JP2011085681A - Cleaning liquid and droplet discharge device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning liquid capable of removing properly dirt in a channel of ink or clogging of a droplet discharge head, in a droplet discharge device used for manufacture of a color filter, and to provide the droplet discharge device usable properly for manufacture of the color filter over a long period. <P>SOLUTION: The cleaning liquid is used for cleaning the droplet discharge device of ink including a coloring agent, a resin material, and a liquid medium for dissolving or dispersing the coloring agent, which is used for manufacture of the color filter by an ink jet method, and contains a compound A shown by formula (10). In the formula (10), R<SP>1</SP>, R<SP>2</SP>and R<SP>3</SP>show independently a 1-3C alkyl group, respectively, and X<SP>1</SP>, X<SP>2</SP>, X<SP>3</SP>, X<SP>4</SP>and X<SP>5</SP>show independently a hydrogen atom or a halogen atom, respectively. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a cleaning liquid and a droplet discharge device.

A color filter is generally used for a liquid crystal display (LCD) or the like that performs color display.
A color filter has conventionally formed a coating film composed of a material (colored layer forming composition) containing a colorant, a photosensitive resin, a functional monomer, a polymerization initiator, etc. on a substrate, and then a photomask. It has been manufactured by using a so-called photolithography method in which a photosensitive process, a developing process, and the like are performed. In such a method, the colors are usually overlapped by repeating the operation of forming a coating film corresponding to each color on almost the entire surface of the substrate, curing only a part thereof, and removing most of the other part. Manufacture color filters so that they do not match. Therefore, only a part of the coating film formed in the process of manufacturing the color filter remains as a colored layer in the finally obtained color filter, and most of the film is removed in the manufacturing process. It will be. For this reason, not only the manufacturing cost of a color filter rises but it is not preferable also from a viewpoint of resource saving.

On the other hand, in recent years, a method of forming a colored layer of a color filter using an inkjet head (droplet discharge head) has been proposed (see, for example, Patent Document 1). In such a method, waste of the material for forming the colored layer (colored layer forming composition) can be reduced, so that the burden on the environment can be reduced and the manufacturing cost can be suppressed. it can.
By the way, a droplet discharge device (for industrial use) used for manufacturing a color filter is completely different from that applied to a printer (for consumer use). For example, mass production or large work (substrate) is performed. Therefore, it is required to discharge a large amount of droplets over a long period of time. In addition, in order to improve the adhesion of the colored layer (colored portion) to be formed to the substrate, the color filter ink used in the production of the color filter generally includes a resin material (binder resin). In comparison with ink used in printers (for consumer use), the viscosity is high, and the load on the droplet discharge device (particularly near the head) accompanying the droplet discharge is large. In addition, in a droplet discharge device (industrial use) used for manufacturing a color filter, a component (for example, a resin material) contained in ink adheres to the ink flow path, thereby causing ink to be discharged to the droplet discharge head. The supply becomes unstable and the discharge port of the droplet discharge head is clogged. As a result, the discharge amount of the droplet becomes unstable and the flying curve of the droplet occurs. Cheap. For this reason, for example, a method (flushing) performed by discharging droplets on a portion without a substrate (work) for a color filter of the droplet discharge device or a droplet discharge head using a suction unit By a method of forcibly sucking ink, aggregates and adhering substances existing in the droplet discharge head and the ink flow path are removed, and contamination and clogging due to ink or the like are eliminated. However, with only such a method, the aggregates and deposits cannot be sufficiently removed. When the droplets are discharged again, the remaining aggregates and deposits flow into the head, and in a relatively short period of time, There has been a problem that the discharge amount of the droplet becomes unstable and the discharge port becomes clogged again. In such a case, it is necessary to frequently replace the droplet discharge head and other members, and the productivity of the color filter is extremely reduced.

JP 2002-372613 A

  An object of the present invention is to provide a cleaning liquid that can suitably eliminate stains in the ink flow path of a droplet discharge device used for manufacturing a color filter and clogging of a droplet discharge head, and for a long period of time. Another object of the present invention is to provide a droplet discharge device that can be preferably used for manufacturing a color filter.

これにより、カラーフィルターの製造に用いる液滴吐出装置のインクの流路における汚れ、液滴吐出ヘッドの目詰まりを好適に解消することができる洗浄液を提供することができる。 Such an object is achieved by the present invention described below.
The cleaning liquid of the present invention is a cleaning liquid for cleaning an ink droplet discharge device that includes a colorant, a resin material, and a liquid medium that dissolves or disperses the colorant, which is used in the manufacture of an ink-jet color filter. There,
It contains a compound A represented by the following formula (10).

Accordingly, it is possible to provide a cleaning liquid that can suitably eliminate contamination in the ink flow path of the droplet discharge device used for manufacturing the color filter and clogging of the droplet discharge head.

In the cleaning liquid of the present invention, the content of the compound A in the cleaning liquid is preferably 40 wt% or more.
Thereby, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent.
In the cleaning liquid of the present invention, it is preferable that the cleaning liquid further contains the same component as the liquid medium constituting the ink in addition to the compound A.
Thereby, it is possible to make the replacement efficiency of the cleaning liquid and the ink (color filter ink) in the ink flow path of the droplet discharge device excellent after cleaning the droplet discharge device with the cleaning liquid.

In the cleaning liquid of the present invention, the cleaning liquid is at least selected from the group consisting of diethylene glycol monobutyl ether acetate, diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether, diethylene glycol diethyl ether, and 1,3-butylene glycol diacetate in addition to the compound A. It is preferable that 1 type is included.
Thereby, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent. Further, the replacement efficiency of the cleaning liquid and the ink (color filter ink) in the ink flow path of the droplet discharge device after the droplet discharge device is cleaned with the cleaning liquid can be made particularly excellent.

In the cleaning liquid of the present invention, the cleaning liquid preferably further contains a dispersant in addition to the compound A.
Thereby, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent. In particular, when the ink (color filter ink) contains a pigment as a colorant, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent.

In the cleaning liquid of the present invention, the cleaning liquid preferably contains the same dispersant as that constituting the ink as the dispersant.
Thereby, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent.
In the cleaning liquid of the present invention, the dispersant preferably includes an acid value dispersant having a predetermined acid value and an amine value dispersant having a predetermined amine value.
Thereby, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent. Further, the replacement efficiency of the cleaning liquid and the ink (color filter ink) in the ink flow path of the droplet discharge device after the droplet discharge device is cleaned with the cleaning liquid can be made particularly excellent.

In the cleaning liquid of the present invention, when the content of the acid value dispersant is X _A [wt%] and the content of the amine value dispersant is X _B [wt%], 0.1 ≦ X _A / X _B It is preferable to satisfy the relationship of ≦ 1.
Thereby, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be further improved. In addition, it is possible to further improve the efficiency of replacement of the cleaning liquid and the ink (color filter ink) in the ink flow path of the droplet discharge device after the droplet discharge device is cleaned with the cleaning liquid.

In the cleaning liquid of the present invention, the acid value of the acid value dispersant is AV [KOH mg / g], the amine value of the amine value dispersant is BV [KOH mg / g], and the content of the acid value dispersant is X _A [ wt%], and when the content of the amine value dispersant is X _B [wt%], the relationship of 0.01 ≦ (AV × X _A ) / (BV × X _B ) ≦ 1.9 is satisfied. Is preferred.
Thereby, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be further improved. In addition, it is possible to further improve the efficiency of replacement of the cleaning liquid and the ink (color filter ink) in the ink flow path of the droplet discharge device after the droplet discharge device is cleaned with the cleaning liquid.

In the cleaning liquid of the present invention, the cleaning liquid is, as the resin material, a monomer component m1 represented by the following formula (1), a monomer component m2 having a carboxyl group or an acid anhydride group, and the following formula (3). It is preferable to be used for cleaning the droplet discharge device that discharges the ink including the polymer M including the monomer component m3 represented.

  If the ink (color filter ink) contains the polymer M, the colored portion formed using the color filter ink has excellent flatness, and the contrast ratio and lightness of the produced color filter are improved. It can be made excellent, and the durability of the color filter can be made excellent. In addition, the resin material has characteristics such that the curing reaction does not substantially proceed at a predetermined temperature or lower, and the curing reaction can proceed efficiently at a temperature higher than that, and the discharge stability of the color filter ink is formed. The hardness of the colored portion can be made excellent. Further, when the ink (color filter ink) contains the polymer M, the cleaning liquid of the present invention can more suitably eliminate contamination in the ink flow path of the droplet discharge device and clogging of the droplet discharge head. Can do.

In the cleaning liquid of the present invention, the cleaning liquid is a monomer component x1 represented by the following formula (11), a monomer component x3 represented by the following formula (13), and the following formula (14) as the resin material. It is preferably used for cleaning the droplet discharge device that discharges the ink containing the polymer X including the monomer component x4 represented.

  When the ink (ink for color filter) contains the polymer X, the curing reaction of the resin material is not allowed to proceed substantially at a predetermined temperature or lower, and the curing reaction can be efficiently performed at a temperature higher than that. It is possible to make the colored portion formed using the color filter ink particularly excellent in solvent resistance, etc. while sufficiently improving the characteristics and the like, and the surface of the colored portion to be formed is flat. The property can be made particularly high. As a result, it is possible to more reliably prevent color unevenness, density unevenness, contrast reduction, etc. at each part of the color filter manufactured using the color filter ink, and durability and reliability of the color filter. Can be made particularly excellent. Further, if the ink (color filter ink) contains the polymer X, the cleaning liquid of the present invention more suitably eliminates contamination in the ink flow path of the droplet discharge device and clogging of the droplet discharge head. Can do.

In the cleaning liquid of the present invention, the cleaning liquid is used for cleaning the droplet discharge device that discharges the ink containing the polymer Y containing the monomer component y1 represented by the following formula (15) as the resin material. It is preferable.

  If the ink (color filter ink) contains the polymer Y, the color filter ink has excellent ejection stability and the like, and the adhesion of the colored portion formed using the color filter ink to the substrate is improved. It can be made particularly excellent, and the durability and reliability of the produced color filter can be made particularly excellent. Further, if the ink (color filter ink) contains the polymer Y, the cleaning liquid of the present invention more suitably eliminates contamination in the ink flow path of the droplet discharge device and clogging of the droplet discharge head. Can do.

In the cleaning liquid of the present invention, the cleaning liquid is a monomer component z1 represented by the following formula (21), a monomer component z2 represented by the following formula (22), and the following formula (23) as the resin material. A polymer Z containing the monomer component z3 represented, a monomer component w1 represented by the following formula (25), a monomer component w2 represented by the following formula (26), and the following formula (27) For cleaning the droplet discharge device that discharges the ink containing at least one of the polymer W including the monomer component w3 represented by formula (28) and the monomer component w4 represented by the following formula (28): It is preferable to be used.

  When the ink (ink for color filter) contains at least one of the polymer Z and the polymer W, the resin material does not substantially proceed with the curing reaction at a predetermined temperature or lower, and the efficiency is higher at a temperature higher than that. It is possible to make the curing reaction proceed well, the discharge stability of the color filter ink, the hardness of the colored portion to be formed, and the like, and when the pigment is included as the colorant, the color The dispersion stability of the pigment in the filter ink can be made particularly excellent. In addition, when the ink (color filter ink) contains at least one of the polymer Z and the polymer W, the surface of the colored portion formed by using the color filter ink has unintentional irregularities. Can be more effectively prevented, and color unevenness and density unevenness in an image displayed using a color filter and a reduction in contrast ratio can be more effectively prevented. Further, if the ink (color filter ink) contains the polymer Y, the cleaning liquid of the present invention more suitably eliminates contamination in the ink flow path of the droplet discharge device and clogging of the droplet discharge head. Can do.

これにより、長期間にわたって、好適にカラーフィルターの製造に用いることのできる液滴吐出装置を提供することができる。 The droplet discharge device of the present invention is a droplet discharge device used for manufacturing a color filter by an inkjet method,
An ink storage tank for storing ink and a cleaning liquid storage tank for storing cleaning liquid;
The ink includes a colorant, a resin material, and a liquid medium that dissolves or disperses the colorant.
The cleaning liquid contains a compound A represented by the following formula (10).

Accordingly, it is possible to provide a droplet discharge device that can be suitably used for manufacturing a color filter over a long period of time.

It is a perspective view which shows the droplet discharge apparatus used for manufacture of a color filter. It is the figure which observed the droplet discharge means in the droplet discharge apparatus shown in FIG. 1 from the stage side. It is a figure which shows the bottom face of the droplet discharge head in the droplet discharge apparatus shown in FIG. 2A and 2B are diagrams illustrating a droplet discharge head in the droplet discharge apparatus illustrated in FIG. 1, in which FIG. It is sectional drawing which shows suitable embodiment of a color filter. It is sectional drawing which shows the manufacturing method of a color filter. It is sectional drawing which shows embodiment of a liquid crystal display device. It is a perspective view showing a configuration of a mobile (or notebook) personal computer as an electronic device including an image display device having a color filter. It is a perspective view which shows the structure of the mobile telephone (PHS is also included) as an electronic device provided with the image display apparatus which has a color filter. It is a perspective view which shows the structure of the digital still camera as an electronic device provided with the image display apparatus which has a color filter.

Hereinafter, preferred embodiments of the present invention will be described.
《Cleaning liquid》
The cleaning liquid (cleaning ink) of the present invention is for cleaning a droplet discharge device used in the production of a color filter. In particular, a colorant, a resin material, and a liquid medium for dissolving or dispersing the colorant are used. It is intended to suitably eliminate contamination, clogging, and the like of the droplet discharge device with the color filter ink (ink) that is included.

By the way, a droplet discharge device (for industrial use) used for manufacturing a color filter is completely different from that applied to a printer (for consumer use). For example, mass production or large work (substrate) is performed. Therefore, it is required to discharge a large amount of droplets over a long period of time. In addition, in order to improve the adhesion of the colored layer (colored portion) to be formed to the substrate, the color filter ink used in the production of the color filter generally includes a resin material (binder resin). In comparison with inks used in printers (for consumer use), the viscosity is high, and the load on the droplet discharge device (particularly near the head) accompanying the droplet discharge is large. In addition, in a droplet discharge device (industrial use) used for manufacturing a color filter, a component (for example, a resin material) contained in ink adheres to the ink flow path, thereby causing ink to be discharged to the droplet discharge head. The supply becomes unstable and the discharge port of the droplet discharge head is clogged. As a result, the discharge amount of the droplet becomes unstable and the flying curve of the droplet occurs. Cheap. For this reason, for example, a method (flushing) performed by discharging droplets on a portion without a substrate (work) for a color filter of the droplet discharge device or a droplet discharge head using a suction unit By a method of forcibly sucking ink, aggregates and adhering substances existing in the droplet discharge head and the ink flow path are removed, and contamination and clogging due to ink or the like are eliminated. However, with only such a method, the aggregates and deposits cannot be sufficiently removed. When the droplets are discharged again, the remaining aggregates and deposits flow into the head, and in a relatively short period of time, There has been a problem that the discharge amount of the droplet becomes unstable and the discharge port becomes clogged again. In such a case, it is necessary to frequently replace the droplet discharge head and other members, and the productivity of the color filter is extremely reduced.
Thus, as a result of intensive studies, the present inventors have found that the above-described problems can be solved by using a cleaning liquid that can suitably clean the flow path of the color filter ink of the droplet discharge device. It came to.
The cleaning liquid of the present invention contains compound A represented by the following formula (10).

  As described above, the cleaning liquid can suitably remove the deposits on the constituent members of the droplet discharge device such as the droplet discharge head and the color filter ink flow path by containing the compound A. The above problems can be reliably prevented. This is because the compound A contained in the cleaning liquid does not adversely affect the constituent members of the droplet discharge device, and the dirt adhering to the color filter ink channel (including nozzles) and the surface of the channel are not affected. It seems to be due to having a function capable of reducing the adhesion.

<Compound A>
As described above, in the present invention, the cleaning liquid contains the compound A represented by the above formula (10).
In the above formula ^{(10), R 1, R} 2, R 3 are each independently, may as long as it is an alkyl group having 1 to 3 carbon atoms, either, preferably a methyl group. Thereby, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent.
In the above formula (10), X ¹ , X ² , X ³ , X ⁴ , and X ⁵ may each independently be a hydrogen atom or a halogen atom, but all of them are hydrogen atoms. preferable. Thereby, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent.
The cleaning liquid may contain a plurality of types of compounds A having different chemical structures.

  The content of Compound A in the cleaning liquid is not particularly limited, but is preferably 40 wt% or more, more preferably 50 wt% or more and 98 wt% or less, and further preferably 55 wt% or more and 95 wt% or less. When the content rate of the compound A is a value within the above range, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent. On the other hand, when the content rate of the compound A is less than the lower limit, there is a possibility that the effect due to the cleaning liquid containing the compound A is not sufficiently exhibited. In addition, when the content of Compound A exceeds the above upper limit, a component (the same component that constitutes the liquid medium of the ink (ink for color filter), etc.) described in detail later is contained in a sufficient ratio. It cannot be performed, and it becomes difficult to sufficiently exert the effect of using the component together. In addition, when a washing | cleaning liquid contains multiple types of compound A from which chemical structure differs, as the value of the content rate of the compound A, the sum total of the content rate of these several compounds shall be employ | adopted.

<Ingredients that constitute the liquid medium of ink (color filter ink)>
The cleaning liquid preferably contains the same components as those constituting the liquid medium of the ink (color filter ink) in addition to the compound A described above. Thereby, it is possible to make the replacement efficiency of the cleaning liquid and the ink (color filter ink) in the ink flow path of the droplet discharge device excellent after cleaning the droplet discharge device with the cleaning liquid. As a result, the productivity of the color filter can be made particularly excellent.

  The liquid medium constituting the ink (color filter ink) will be described in detail later. The cleaning liquid is diethylene glycol monobutyl ether acetate, diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether, diethylene glycol diethyl ether, and 1,3-butylene glycol diacetate. It is preferable that it contains at least one selected from the group consisting of: Thereby, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent. Further, the replacement efficiency of the cleaning liquid and the ink (color filter ink) in the ink flow path of the droplet discharge device after the droplet discharge device is cleaned with the cleaning liquid can be made particularly excellent.

  When the cleaning liquid contains at least one of at least one selected from the group consisting of diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether and diethylene glycol diethyl ether as a common component with the ink (color filter ink), the cleaning liquid As a result, the fluidity of the cleaning liquid is lowered and the fluidity of the cleaning liquid is increased, and the replacement with the ink after cleaning can be performed more smoothly.

<Dispersant>
The cleaning liquid may contain a dispersant having a function of dispersing a solid content (including a cured product of a resin material described later) of the ink (color filter ink). Thereby, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent. In particular, when the ink (color filter ink) contains a pigment as a colorant, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent.

  The cleaning liquid preferably contains the same dispersant as that constituting the color filter ink as the dispersant. Thereby, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent. In addition, when the ink (color filter ink) contains a pigment, the cleaning liquid in the color filter ink flow path of the droplet discharge device and the color filter ink, which are performed after cleaning the droplet discharge device with the cleaning liquid, are performed. Even when local mixing of the cleaning liquid and the ink occurs at the time of replacement, the pigment in the ink can maintain a stable dispersion, so that the replacement efficiency of the ink can be improved.

Examples of the dispersant include cationic, anionic, nonionic, amphoteric, silicone, and fluorine surfactants.
More specific examples of the dispersant include, for example, Dispersic 101, Dispersic 102, Dispersic 103, Dispersic P104, Dispersic P104S, Dispersic 220S, Dispersic 106, Dispersic 108, Dispersic 109, Disperse Bic 110, Dispersic 111, Dispersic 112, Dispersic 116, Dispersic 140, Dispersic 142, Dispersic 160, Dispersic 161, Dispersic 162, Dispersic 163, Dispersic 164, Dispersic 166, Dispersic 167 Dispersic 168, Dispersic 170, Dispersic 171, Dispersic 1 4, Dispersic 180, Dispersic 182, Dispersic 183, Dispersic 184, Dispersic 185, Dispersic 2000, Dispersic 2001, Dispersic 2050, Dispersic 2070, Dispersic 2095, Dispersic 2150, Dispersic LPN6919, Dispersic 9075, Dispersic 9077 (above, manufactured by BYK Chemie); EFKA 4008, EFKA 4009, EFKA 4010, EFKA 4015, EFKA 4020, EFKA 4046, EFKA 4047, EFKA 4050, EFKA 4055, EFKA 4055, EFKA 4055 , EFKA 4401, EFKA 4402, EFKA 44 3, EFKA 4406, EFKA 4408, EFKA 4300, EFKA 4330, EFKA 4340, EFKA 4015, EFKA 4800, EFKA 5010, EFKA 5065, EFKA 5066, EFKA 5070, EFKA 5070, EFKA 5070 Sol Sparse 3000, Sol Sparse 9000, Sol Sparse 13000, Sol Sparse 16000, Sol Sparse 17000, Sol Sparse 18000, Sol Sparse 20000, Sol Sparse 21000, Sol Sparse 24000, Sol Sparse 26000, Sol Sparse 27000, Sol Sparse 28000, Sol Sparse 32000, Sol Sparse 32500, Sol Sparse 33500, Sol Sparse 33500 Perth 35100, Solsperse 35200, Solsperse 36000, Solsperse 36600, Solsperse 38500, Solsperse 41000, Solsperse 41090, Solsperse 20000 (above, manufactured by Lubrizol Corporation); Manufactured by Fine Techno Co., Ltd.); Disparon 1850, Disparon 1860, Disparon 2150, Disparon 7004, Disparon DA-100, Disparon DA-234, Disparon DA-325, Disparon DA-375, Disparon DA-705, Disparon DA-725, Disparon PW -36 (above, manufactured by Enomoto Kasei Co., Ltd.); DOPA-14, Floren DOPA-15B, Floren DOPA-17, Floren DOPA-22, Floren DOPA-44, Floren TG-710, Floren D-90 (above, manufactured by Kyoei Chemical Co., Ltd.), Anti-Terra-205 (Big Chemie) Hinoact KF-1000, KF-1525, Hinoact 1300M, Hinoact T9050, Hinoact T6000, Hinoact T7000, Hinoact T8000, Hinoact T8000E (above, manufactured by Kawaken Fine Chemical Co., Ltd.), etc. Alternatively, two or more kinds can be used in combination.

  In particular, the cleaning liquid contains, as a dispersant, a dispersant having a predetermined acid value (hereinafter also referred to as an acid value dispersant) and a dispersant having a predetermined amine value (hereinafter also referred to as an amine value dispersant). It is preferable that As a result, the stain adhering to the droplet discharge device (especially, the stain when the color filter ink applied to the droplet discharge device contains a resin material as described in detail later) is swollen more efficiently. In this way, it can be easily removed. For this reason, when the cleaning liquid contains an acid value dispersant and an amine value dispersant, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent. Further, if the cleaning liquid contains an acid value dispersant and an amine value dispersant, the cleaning liquid and the color filter ink in the flow path of the color filter ink of the droplet discharge device are washed after the droplet discharge device is cleaned with the cleaning liquid. The efficiency of substitution with can be made particularly excellent.

  Specific examples of the acid value dispersant include Dispersic P104, Dispersic P104S, Dispersic 220S, Dispersic 110, Dispersic 111, Dispersic 170, Dispersic 171, Dispersic 174, Dispersic 2095 (above, BYK Chemie) EFKA 5010, EFKA 5065, EFKA 5066, EFKA 5070, EFKA 7500, EFKA 7554 (above, manufactured by Ciba Specialty); Solsperse 3000, Solsperse 16000, Solsperse 17000, Solsperse 18000, Solsperse 36000, Solsperse 36000, (Above, manufactured by Lubrizol), Hinoact KF-1000 (Kawaken Fine Chemi) Le Co., Ltd.).

  Specific examples of the amine value dispersant include Dispersic 102, Dispersic 160, Dispersic 161, Dispersic 162, Dispersic 163, Dispersic 164, Dispersic 166, Dispersic 167, Dispersic 168, Dispersic 2150, Dispersic LPN6919, Dispersic 9075, Dispersic 9077 (above, manufactured by BYK Chemie); EFKA 4015, EFKA 4020, EFKA 4046, EFKA 4047, EFKA 4050, EFKA 4055, EFKA 4060, EFKA 4060, EFKA 4060, EFKA 4060, , EFKA 4340, EFKA 4400, EFKA 4401, EFKA 4402, EFK A4403, EFKA 4800 (manufactured by Ciba Specialty); Azisper PB711 (manufactured by Ajinomoto Finetechno); Anti-Terra-205 (manufactured by Big Chemie), KF-1525, Hinoact 1300M, Hinoact T9050, Hinoact T6000 Hinoact T7000, Hinoact T8000, Hinoact T8000E (manufactured by Kawaken Fine Chemical Co., Ltd.) and the like.

When an acid value dispersant and an amine value dispersant are used in combination, the acid value of the acid value dispersant (acid value when converted to solid content) is not particularly limited, but is 5 KOHmg / g or more and 370 KOHmg / g or less. Is more preferably 20 KOH mg / g or more and 270 KOH mg / g or less, and further preferably 30 KOH mg / g or more and 135 KOH mg / g or less. When the acid value of the acid value dispersing agent is a value within the above range, the above effects are more remarkably exhibited. The acid value of the dispersant can be determined by a method based on DIN EN ISO 2114, for example.
Moreover, it is preferable that the acid value dispersant does not have a predetermined amine value, that is, the amine value is zero.

  When the amine value dispersant and the acid value dispersant are used in combination, the amine value of the amine value dispersant (amine value in terms of solid content) is not particularly limited, but is 5 KOHmg / g or more and 200 KOHmg / g or less. Is more preferably 25 KOHmg / g or more and 170 KOHmg / g or less, and further preferably 30 KOHmg / g or more and 130 KOHmg / g or less. When the amine value of the amine value dispersant is a value within the above range, the above effects are more remarkably exhibited. In addition, the amine value about a dispersing agent can be calculated | required by the method based on DIN 16945, for example.

Moreover, it is preferable that the amine value dispersant does not have a predetermined acid value, that is, the acid value is zero.
When the acid value dispersant and the amine value dispersant are used in combination, the content of the acid value dispersant in the cleaning liquid is X _A [wt%], and the content of the amine value dispersant in the cleaning liquid is X _B [ wt%], the relationship 0.1 ≦ X _A / X _B ≦ 1 is preferably satisfied, and the relationship 0.15 ≦ X _A / X _B ≦ 0.5 is more preferably satisfied. By satisfying such a relationship, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be further improved. Further, it is possible to further improve the efficiency of replacing the cleaning liquid and the color filter ink in the flow path of the color filter ink of the droplet discharge apparatus after the droplet discharge apparatus is cleaned with the cleaning liquid.

The acid value of the acid value dispersant is AV [KOH mg / g], the amine value of the amine value dispersant is BV [KOH mg / g], the content of the acid value dispersant is X _A [wt%], the amine When the content of the valent dispersant is X _B [wt%], it is preferable that the relationship of 0.01 ≦ (AV × X _A ) / (BV × X _B ) ≦ 1.9 is satisfied, and 0.10 It is more preferable that the relationship of ≦ (AV × X _A ) / (BV × X _B ) ≦ 1.5 is satisfied. By satisfying such a relationship, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be further improved. Further, it is possible to further improve the efficiency of replacing the cleaning liquid and the color filter ink in the flow path of the color filter ink of the droplet discharge apparatus after the droplet discharge apparatus is cleaned with the cleaning liquid.
Note that a dispersant other than the above may be used as the dispersant.
The content of the dispersant in the cleaning liquid is preferably 0.1 wt% or more and 10 wt% or less, and more preferably 0.2 wt% or more and 6.0 wt% or less. Thereby, the effects as described above are more remarkably exhibited.

<Pigment>
The cleaning liquid of the present invention may contain a pigment. When the cleaning liquid contains a pigment, it is possible to more suitably remove deposits on the constituent members of the droplet discharge device such as the droplet discharge head and the color filter ink flow path. This is presumably because the fine pigment contained in the cleaning liquid suitably scrapes off the dirt adhering to the color filter ink flow path (including nozzles).

  When the cleaning liquid contains a pigment, the content of the pigment in the cleaning liquid is not particularly limited, but is preferably 0.2 wt% or more and 13 wt% or less, and more preferably 0.3 wt% or more and 10 wt% or less. . When the pigment content is within the above range, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent. On the other hand, if the content of the pigment is less than the lower limit, the effect of the cleaning liquid containing the pigment may not be sufficiently exhibited. In addition, when the pigment content exceeds the above upper limit value, dirt in the flow path and the like (especially dirt due to the resin material constituting the color filter ink) can be removed by washing with the washing liquid, but the washing liquid There is a possibility that the pigment inside remains locally at a high concentration in the ink flow path of the droplet discharge device.

As described above, the cleaning liquid contains a pigment, but the content of the pigment in the cleaning liquid is preferably relatively low, and is introduced into the color filter ink (the flow path cleaned by the cleaning liquid). It is more preferable that the content is lower than the content of the colorant in the color filter ink).
More specifically, when the content of the pigment in the cleaning liquid is C _PC [wt%] and the content of the colorant in the color filter ink is C _CI [wt%], 0.05 ≦ C _CI / It is preferable to satisfy the relationship of C _PC ≦ 0.8, and it is more preferable to satisfy the relationship of 0.07 ≦ C _CI / C _PC ≦ 0.5. By satisfying such a relationship, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent.

When the cleaning liquid contains plural kinds of pigments, the sum of these contents is adopted as the pigment content (C _PC ) in the cleaning liquid, and the color filter ink contains plural kinds of pigments. When a colorant is contained, the sum of the content ratios of these components is adopted as the colorant content ratio ( _CCI ) in the color filter ink.
The pigment contained in the cleaning liquid is preferably of the same color as the colorant constituting the color filter ink described in detail later. As a result, even when the cleaning liquid in the ink flow path of the droplet discharge device and the color filter ink are not sufficiently replaced after cleaning the droplet discharge device with the cleaning liquid, The occurrence of poor color tone can be reliably prevented. Here, the “same color system” means that the two colors to be compared have an absolute value of the difference of a ^{* in} the L ^* a ^* b ^* color system (JIS Z 8729) of 10 or less (preferably 5 or less) and the absolute value of the difference in b ^* is 10 or less (preferably 5 or less). In addition, when both the pigment constituting the cleaning liquid and the colorant constituting the color filter ink are registered in the color index, the color name included in the color index name is the same for both. If it is, it can be said that it is “same color system”.

  Moreover, it is preferable that a washing | cleaning liquid contains the same thing as the pigment as a colorant which comprises the ink for color filters as a pigment. Thereby, it is possible to make the replacement efficiency of the cleaning liquid and the color filter ink in the flow path of the color filter ink of the droplet discharge device excellent after cleaning the droplet discharge device with the cleaning liquid. In addition, even if the cleaning liquid and the color filter ink in the flow path of the color filter ink of the droplet discharge device after the cleaning of the droplet discharge device with the cleaning liquid are insufficient, the color produced It can prevent more reliably that a color tone defect generate | occur | produces in a filter.

When the color filter ink contains a pigment as a colorant, the average particle diameter of the pigment contained in the cleaning liquid is D _PC [nm], and the color filter ink used in the flow path to which the cleaning liquid is applied It is preferable that the relationship of D _PC ≦ D _CI is satisfied, where the average particle diameter of the pigment contained in is D _CI [nm]. Thereby, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent.
The average particle size of the pigment contained in the cleaning liquid is preferably 1 nm or more and 180 nm or less, more preferably 2 nm or more and 160 nm or less, and further preferably 5 nm or more and 100 nm or less. When the average particle diameter of the pigment is within the above range, the cleaning efficiency of the droplet discharge device by the cleaning liquid can be made particularly excellent.

<Ceramic particles>
The cleaning liquid of the present invention may contain ceramic particles. When the cleaning liquid contains ceramic particles, it is possible to more suitably remove deposits on the constituent members of the droplet discharge device such as the droplet discharge head and the color filter ink flow path. This is presumably because fine ceramic particles contained in the cleaning liquid suitably scrape off the dirt adhering to the color filter ink flow path (including nozzles).

Ceramic particles are insoluble components and are contained as powders in the cleaning liquid.
As ceramics, for example, Al ₂ O ₃ , SiO ₂ , TiO ₂ , Ti ₂ O ₃ , ZrO ₂ , Y ₂ O ₃ , oxide-based ceramics such as barium titanate and strontium titanate, AlN, Si ₃ N ₄ , SiN, TiN, BN, ZrN, HfN, VN, TaN, NbN, CrN, Cr ₂ N, and other nitride ceramics, graphite, SiC, ZrC, Al ₄ C ₃ , CaC ₂ , WC, TiC, HfC, VC , Carbide ceramics such as TaC and NbC, boride ceramics such as ZrB ₂ and MoB, or composite ceramics in which two or more of these are arbitrarily combined.

Moreover, the ceramic particle should just be mainly comprised with the above ceramics, and may contain materials other than ceramics. For example, glass particles containing components other than SiO ₂ such as soda lime glass can be used as ceramic particles in the present invention. In the present specification, the term “mainly” or “main component” for the constituent material means that the content is the highest in the entire target substance, and preferably the proportion of the total target substance Means 50 wt% or more.

  The content of the ceramic particles (powder) in the cleaning liquid is preferably 0.00001 wt% or more and 0.5 wt% or less, more preferably 0.00005 wt% or more and 0.3 wt% or less, and 0.0001 wt%. More preferably, it is 0.1 wt% or less. By including ceramic particles at such a ratio, the above-described effects are reliably exhibited. On the other hand, when the content rate of the ceramic particles is less than the lower limit, the effect of including the ceramic particles as described above may not be sufficiently exhibited. If the content of the ceramic particles exceeds the upper limit, the dispersion stability of the ceramic particles in the cleaning liquid is drastically decreased, the fluidity of the ceramic particles is drastically decreased, and the discharge port of the droplet discharge head Clogging is likely to occur. Moreover, the adhesiveness with respect to the board | substrate of the coloring part formed will also fall. In addition, although it is not without the possibility that ceramic particles are included as an inevitable component in each material constituting the cleaning liquid, in such a case, the content is very small compared to the above values. Therefore, it cannot be contained at a relatively high content as described above.

When the color filter ink contains a pigment as a colorant, the average particle size of the ceramic particles contained in the cleaning liquid is preferably equal to or less than the average particle size of the pigment. Thereby, the deposits on the constituent members of the droplet discharge device such as the color filter ink flow path can be more suitably removed.
When the average particle diameter of the pigment constituting the color filter ink is D _P [nm] and the average particle diameter of the ceramic particles constituting the cleaning liquid is D _C [nm], 0.2 ≦ D _C / D _P ≦ 1 0.0 is preferable, 0.22 ≦ D _C / D _P ≦ 0.8 is more preferable, and 0.25 ≦ D _C / D _P ≦ 0.7 is satisfied. It is more preferable to satisfy. By satisfying such a relationship, the effects as described above are more remarkably exhibited.

  The average particle size of the ceramic particles (powder) contained in the color filter is preferably 3 nm to 120 nm, and more preferably 5 nm to 60 nm. Thereby, the deposits on the constituent members of the droplet discharge device such as the color filter ink flow path can be more suitably removed. On the other hand, if the average particle size of the ceramic particles is less than the lower limit, the effect of including the ceramic particles as described above may not be sufficiently exhibited depending on the content of the ceramic particles. On the other hand, when the average particle size of the ceramic particles exceeds the upper limit, the dispersion stability of the ceramic particles in the cleaning liquid decreases, and the fluidity of the cleaning liquid also decreases.

<Other ingredients>
The cleaning liquid of the present invention may contain components other than those described above.
Examples of such components include surfactants, antifoaming agents, light stabilizers, antioxidants, ultraviolet absorbers, and aggregation inhibitors such as sodium polyacrylate.
In general, a droplet discharge device used for manufacturing a color filter is provided with independent flow paths for a plurality of types of ink, but a different cleaning liquid is used for each of the plurality of types of ink. May be. That is, a cleaning liquid set including a plurality of different cleaning liquids may be used for cleaning the droplet discharge device.

Next, the color filter ink ejected using the droplet ejection apparatus to which the cleaning liquid of the present invention is applied will be described.
≪Color filter ink≫
The color filter ink is an ink used for manufacturing a color filter (forming a colored portion of the color filter). In the present invention, the color filter ink is particularly used for manufacturing a color filter by an ink jet method.
The color filter ink includes a colorant, a resin material, a liquid medium in which the colorant is dissolved and / or dispersed, and the like.

<Colorant>
The color filter usually has a plurality of different colored portions (generally, three colored portions corresponding to RGB). The colorant is usually selected according to the color tone of the colored portion to be formed. As a colorant constituting the color filter ink, for example, various pigments and various dyes can be used.

  Examples of the pigment include C.I. I. Pigment Red 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 21, 21, 23, 30, 31, 32, 37, 38, 40, 41, 42, 48: 1, 48: 2, 48: 3, 48: 4, 49: 1, 49: 2, 50: 1, 52: 1, 53: 1, 57, 57: 1, 57: 2, 58: 2, 58: 4, 60: 1, 63: 1, 63: 2, 64: 1, 81, 81: 1, 83, 88, 90: 1, 97, 101, 102, 104, 105, 106, 108, 108: 1, 112, 113, 114, 122, 123, 144, 146, 149, 150, 151, 166, 168, 170, 171, 172, 174, 175, 176, 177, 178, 179, 180, 185, 187, 188, 190, 193 194,202,206,207,208,209,215,216,220,224,226,242,243,245,254,255,264,265; C. I. Pigment Green 7, 36, 15, 17, 18, 19, 26, 50; C.I. I. Pigment blue 1,15,15: 1,15: 2,15: 3,15: 4,15: 6, 17: 1,18,60,27,28,29,35,36,60,80; I. Pigment Yellow 1, 3, 12, 13, 14, 15, 16, 17, 20, 24, 31, 34, 35, 35: 1, 37, 37: 1, 42, 43, 53, 55, 60, 61, 65, 71, 73, 74, 81, 83, 93, 94, 95, 97, 98, 100, 101, 104, 106, 108, 109, 110, 113, 114, 116, 117, 119, 120, 126, 127, 128, 129, 138, 139, 150, 151, 152, 153, 154, 155, 156, 157, 166, 168, 175, 180, 184, 185; I. Pigment violet 1, 3, 14, 16, 19, 23, 29, 32, 36, 38, 50; C.I. I. Pigment Orange 1, 5, 13, 14, 16, 17, 20, 20: 1, 24, 34, 36, 38, 40, 43, 46, 49, 51, 61, 63, 64, 71, 73, 104; C. I. Pigment brown 7, 11, 23, 25, 33; I. Pigment black 1 and 7, halogenated phthalocyanine zinc complex, and derivatives thereof.

When the color filter ink contains a pigment as a colorant, it is advantageous in improving the light resistance and heat resistance of the formed color filter (colored portion).
Among the above colorants, the color filter ink is C.I. I. Pigment red 254, C.I. I. Pigment red 177, C.I. I. Pigment blue 15: 6, C.I. I. Pigment violet 23, C.I. I. It is preferable to include one or two or more selected from the group consisting of CI Pigment Yellow 150, a halogenated phthalocyanine zinc complex, and derivatives thereof. Thereby, the color reproduction range and light resistance of the produced color filter can be made particularly excellent.

In particular, the color filter ink is used as a pigment (red pigment) as C.I. I. Pigment Red 177 and its derivatives, and / or C.I. I. When the pigment red 254 and derivatives thereof are included, the color developability of the color filter ink (red color filter ink) can be made particularly excellent. Moreover, the effect by using together with the resin material described in detail later is more remarkably exhibited, and the dispersion stability of the pigment particles in the color filter ink can be improved. As a result, it is possible to suppress an increase in thixotropic property of the color filter ink at the time of forming the colored portion, and at the time of applying the ink to the cell, the discharge stability of the color filter ink is particularly excellent. be able to.
C. I. Pigment Red 177 derivatives, C.I. I. In the case of containing a compound (derivative) represented by the following formula (30) or the following formula (31) as a pigment red 254 derivative, the effects as described above are more remarkably exhibited.

Further, when the color filter ink contains the above-mentioned pigment (red pigment), when an adhering matter is formed on the constituent members of the droplet discharge device such as the flow path of the color filter ink The deposit can be more suitably removed by the cleaning liquid described above.
In particular, the color filter ink is used as a pigment (green pigment). I. When it contains CI Pigment Green 58 (brominated zinc phthalocyanine pigment), the color developability of the color filter ink (green color filter ink) can be made particularly excellent. In addition, C.I. I. Although Pigment Green 58 has a feature of excellent brightness, conventionally, it has been a very difficult material to stably disperse.

  However, the present inventor I. Even when Pigment Green 58 is included, the dispersion stability in the color filter ink can be improved by using a resin material (a resin material including the polymer M) described later in detail. I found. As a result, the color developability of the color filter ink can be further improved, and the increase in thixotropic property of the color filter ink due to the high concentration of the pigment when forming the colored portion can be suppressed. Can do. Further, the long-term dispersion stability of the pigment in the color filter ink (storability of the color filter ink) and the discharge stability of the color filter ink can be made particularly excellent.

In addition, the color filter ink may be C.I. I. When the pigment green 58 (brominated zinc phthalocyanine pigment) is contained, when the deposit on the constituent members of the droplet discharge device such as the flow path of the color filter ink is generated, Can be removed more suitably.
In addition, the present inventor I. It has been found that when Pigment Green 58 is included, the dispersion stability in the color filter ink can be further improved by simultaneously including a sulfonated pigment derivative as a secondary pigment. As a result, the color developability of the color filter ink can be further improved, and the increase in the thixotropic property of the color filter ink due to the increased concentration of the pigment at the time of forming the colored portion is more effective. Can be suppressed. Further, the long-term dispersion stability of the pigment in the color filter ink (storability of the color filter ink) and the discharge stability of the color filter ink can be further improved.

  As a pigment, C.I. I. When the pigment green 58 and the sulfonated pigment derivative are included, the sulfonated pigment derivative preferably contains a compound (derivative) represented by the following formula (32). As a result, the dispersion stability of the pigment particles in the color filter ink and the ejection stability of the color filter ink can be made particularly excellent, and an image with better contrast can be obtained in the produced color filter. Can be displayed.

In this way, a pigment derivative (sub-pigment) having a specific chemical structure is converted into C.I. I. By using together with Pigment Green 58 (main pigment), the above-mentioned excellent effect is obtained as a result of intensive studies by the present inventors, and details of the mechanism are unknown. However, it is thought that this is due to the following reasons.
C. I. The brominated phthalocyanine constituting the pigment green 58 has a highly conjugated system as a whole molecule, and has a planar structure, which is stable in terms of energy. The brominated phthalocyanine is placed in a stable state in which the conjugated π electrons between the molecules overlap each other by arranging (parallel) the planar molecules. For this reason, C.I. I. Pigment Green 58 inherently tends to agglomerate and is difficult to stably disperse in a liquid medium.

  On the other hand, in the pigment derivative as described above, the hydrogen atom bonded to the nitrogen atom in the formula (32) forms a hydrogen bond with the oxygen atom constituting the phthalimide structure. For this reason, the hydrogen atom bonded to the nitrogen atom in formula (32) is substantially bonded to the oxygen atom constituting the phthalimide structure together with the nitrogen atom constituting the quinoline structure. In the pigment derivative (sulfonated pigment derivative) as described above, a stable ring structure (7-membered ring structure) with 7 atoms numbered 1 to 7 in the formula (32) is formed. By forming such a seven-membered ring structure, the plane due to the quinoline structure and the plane due to the phthalimide structure are in a non-parallel state.

  In this way, the plane due to the quinoline structure and the plane due to the phthalimide structure are non-parallel, so that C.I. I. Pigment derivatives (sulfonated pigment derivatives) having moderate affinity for CI Pigment Green 58 (brominated phthalocyanine) are disclosed in C.I. I. Pigment Green 58 enters between the molecules, and as described above, C. I. It is possible to make the pigment green 58 difficult to aggregate. Furthermore, since the above pigment derivatives (sulfonated pigment derivatives) have a sulfo group in the molecule, they are excellent in dispersibility in a liquid medium described later. The above is considered to act synergistically and to obtain the very excellent effects as described above.

  C. I. When the pigment green 58 and the pigment derivative (sulfonated pigment derivative) as described above are included, the content of the pigment derivative (sulfonated pigment derivative) in the color filter ink is not particularly limited. I. Pigment Green 58 (main pigment): It is preferably 10 to 80 parts by weight, more preferably 30 to 70 parts by weight, based on 100 parts by weight. As a result, the long-term dispersion stability of the pigment particles in the color filter ink and the discharge stability of the droplets can be made particularly excellent, and the contrast of the color filter manufactured using the color filter ink, The brightness can be made particularly excellent.

In particular, the color filter ink is used as a pigment (blue pigment). I. Pigment blue 15: 6 and C.I. I. When the pigment violet 23 is contained, the color developability of the color filter ink (blue color filter ink) can be made particularly excellent. Further, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent.
In addition, the color filter ink may be C.I. I. Pigment blue 15: 6 and C.I. I. When the pigment violet 23 is included, when the deposit on the constituent members of the droplet discharge device such as the color filter ink flow path is generated, the deposit is more preferably removed by the above-described cleaning liquid. Can do.

  When the color filter ink is a pigment containing a pigment as a colorant (pigment ink), the average particle size of the pigment is preferably 10 nm or more and 200 nm or less, and more preferably 20 nm or more and 180 nm or less. As a result, the durability of the color filter manufactured using the color filter ink (light resistance) while sufficiently improving the dispersion stability of the pigment in the color filter ink and the discharge stability of the color filter ink. For example, the color developability and contrast of the color filter are particularly excellent.

  Examples of the dye include azo dyes, anthraquinone dyes, condensed polycyclic aromatic carbonyl dyes, indigoid dyes, carbonium dyes, phthalocyanine dyes, methine, and polymethine dyes. Specific examples of the dye include C.I. I. Direct Red 2, 4, 9, 23, 26, 28, 31, 39, 62, 63, 72, 75, 76, 79, 80, 81, 83, 84, 89, 92, 95, 111, 173, 184 207, 211, 212, 214, 218, 221, 223, 224, 225, 226, 227, 232, 233, 240, 241, 242, 243, 247, C.I. I. Acid Red 35, 42, 51, 52, 57, 62, 80, 82, 111, 114, 118, 119, 127, 128, 131, 143, 145, 151, 154, 157, 158, 211, 249, 254 257, 261, 263, 266, 289, 299, 301, 305, 319, 336, 337, 361, 396, 397, C.I. I. Reactive Red 3, 13, 17, 19, 21, 22, 23, 24, 29, 35, 37, 40, 41, 43, 45, 49, 55, C.I. I. Basic Red 12, 13, 14, 15, 18, 22, 23, 24, 25, 27, 29, 35, 36, 38, 39, 45, 46, C.I. I. Direct violet 7, 9, 47, 48, 51, 66, 90, 93, 94, 95, 98, 100, 101, C.I. I. Acid Violet 5, 9, 11, 34, 43, 47, 48, 51, 75, 90, 103, 126, C.I. I. Reactive violet 1,3,4,5,6,7,8,9,16,17,22,23,24,26,27,33,34, C.I. I. Basic violet 1, 2, 3, 7, 10, 15, 16, 20, 21, 25, 27, 28, 35, 37, 39, 40, 48, C.I. I. Direct yellow 8, 9, 11, 12, 27, 28, 29, 33, 35, 39, 41, 44, 50, 53, 58, 59, 68, 87, 93, 95, 96, 98, 100, 106, 108, 109, 110, 130, 142, 144, 161, 163, C.I. I. Acid Yellow 17, 19, 23, 25, 39, 40, 42, 44, 49, 50, 61, 64, 76, 79, 110, 127, 135, 143, 151, 159, 169, 174, 190, 195 196, 197, 199, 218, 219, 222, 227, C.I. I. Reactive Yellow 2, 3, 13, 14, 15, 17, 18, 23, 24, 25, 26, 27, 29, 35, 37, 41, 42, C.I. I. Basic yellow 1, 2, 4, 11, 13, 14, 15, 19, 21, 23, 24, 25, 28, 29, 32, 36, 39, 40, C.I. I. Acid Green 16, C.I. I. Acid Blue 9, 45, 80, 83, 90, 185, C.I. I. Basic orange 21, 23, etc. are mentioned.

  The content of the colorant in the color filter ink is preferably 2 wt% or more and 25 wt% or less, and more preferably 3 wt% or more and 20 wt% or less. When the colorant content is within the above range, a higher color density can be ensured in a color filter produced using the color filter ink, and the color filter can be used for clearer image display. . In addition, the amount of color filter ink required to form a colored portion having a predetermined color density can be reduced, which is advantageous from the viewpoint of resource saving. Moreover, since the volatilization amount of the solvent when forming the colored portion of the color filter can be suppressed, the burden on the environment can be reduced.

<Resin material>
In general, the color filter ink contains a resin material (binder resin) for the purpose of improving the adhesion of the formed colored portion to the substrate. In general, a color filter manufactured using an ink jet method is subjected to a heat treatment and a cleaning treatment with a solvent or the like in the manufacturing process. For this reason, color filters manufactured using the inkjet method are required to have durability such as heat resistance and solvent resistance, but it has been difficult to obtain satisfactory durability with conventional color filters. . Conventionally, the contrast ratio and brightness of an image displayed using a color filter cannot be made sufficiently high, resulting in color unevenness, density unevenness, and the like. Such a tendency is more prominent when a pigment is included as a colorant and the content of the pigment is higher than that of the resin material. This is considered to be due to aggregation of pigment particles contained in the ink as the solid content concentration increases.
On the other hand, the present inventor has found that the above problems can be solved by using the resin material described below.

Hereinafter, the resin material (curable resin material) constituting the color filter ink will be described in detail.
In the color filter ink of the present embodiment, the resin material is a monomer component m1 represented by the following formula (1), a monomer component m2 having a carboxyl group or an acid anhydride group, and the following formula (3). The polymer M containing the monomer component m3 represented is included.

[Polymer M]
The polymer M includes a monomer component m1 represented by the above formula (1), a monomer component m2 having a carboxyl group or an acid anhydride group, and a monomer component m3 represented by the above formula (3). Is included.
By including such a polymer M, the colored portion formed using the color filter ink has excellent flatness, and the contrast ratio and brightness of the produced color filter are excellent. In addition, the durability of the color filter can be improved. In addition, the resin material has a characteristic that allows the curing reaction to proceed efficiently at a temperature higher than the predetermined temperature at a predetermined temperature or lower (hereinafter, also referred to as “curing reaction switching characteristics”). In addition, the discharge stability of the color filter ink, the hardness of the colored portion to be formed can be made excellent, and the dispersion stability of the pigment in the color filter ink can be made particularly excellent. it can. Moreover, since the polymer M is very excellent in affinity and compatibility with the resin components (polymer X, polymer Y, polymer Z, polymer W) described later, resin components other than the polymer M In addition, the resin material can be prevented from unintentionally precipitating in the color filter ink, and droplets can be discharged with excellent discharge stability. The characteristics of the components can be fully exhibited, and the occurrence of problems such as a decrease in transparency due to unintended phase separation can be reliably prevented. In addition, the long-term storage stability of the color filter ink (the life of the color filter ink) is extremely excellent, and it effectively prevents the occurrence of problems such as quality degradation due to the mass production of color filter ink. In addition, since the replacement frequency of the color filter ink can be reduced when manufacturing the color filter, the productivity of the color filter and the reliability of the manufactured color filter can be improved. Further, when the color filter ink contains the polymer M, the cleaning liquid as described above can more suitably eliminate contamination in the ink flow path of the droplet discharge device and clogging of the droplet discharge head. .
The polymer M may be substantially composed of a single compound, or may be a mixture of a plurality of types of compounds. However, when the polymer M is a mixture of a plurality of types of compounds, each compound contains monomer components m1, m2, and m3.

(Monomer component m1)
The polymer M contains a monomer component m1 represented by the above formula (1), that is, a compound having a blocked isocyanate group (hereinafter also referred to as “block isocyanate group”) as a monomer component. It will be. The polymer M constituting the color filter ink may include a plurality of monomer components m1 represented by the general formula (1) in the molecule.

  By including such a monomer component m1 as a monomer component in the polymer M, an unintentional reaction (polymerization reaction) of the resin material during storage of the color filter ink or in an ink application process described later. In the colored part forming step (curing step) performed under a heating environment, the curing reaction (polymerization reaction) of the resin material can be suitably advanced. That is, the switching characteristics of the curing reaction for the resin material can be made excellent. This is considered to be due to the following reasons. That is, the blocked isocyanate group of the monomer m1 in the polymer M is deblocked by a relatively high energy as given in the colored portion forming step (curing step), and an active isocyanate group is generated. Isocyanate group and carboxyl group or acid anhydride group contribute to the curing, and can improve the adhesion to the substrate, heat resistance, chemical resistance, etc. Such deblocking does not proceed, and the progress of the curing reaction is prevented or suppressed.

In the monomer A represented by the formula (1), R ¹ represents a hydrogen atom or a methyl group, and R ² represents a divalent aliphatic saturated hydrocarbon group having 1 to 8 carbon atoms. R ³ represents a residue of an isocyanate group blocking agent R ³ H.
Examples of the divalent saturated aliphatic hydrocarbon group having 1 to 8 carbon atoms in R ² include linear chains such as methylene, ethylene, trimethylene, propylene, tetramethylene, pentamethylene, hexamethylene, heptamethylene, and octamethylene groups. And a branched divalent saturated aliphatic hydrocarbon group (alkylene group). Among these, C2-C4 bivalent saturated aliphatic hydrocarbon groups, such as ethylene, trimethylene, and a propylene group, are preferable.

Examples of the isocyanate group blocking agent R ³ H include oxime blocking agents such as formaldoxime, acetoaldoxime, acetoxime, methyl ethyl ketoxime, methyl isobutyl ketoxime, diethyl ketoxime, cyclohexanone oxime, diacetyl monooxime, and benzophenone oxime. A pyrazole block agent such as 3,5-dimethylpyrazole; an alcohol block agent such as methanol and ethanol; a phenol block agent such as phenol and cresol; a mercaptan block agent such as butyl mercaptan; acetanilide, ε-caprolactam, γ -Acid amide blocking agents such as butyrolactam; active methylene blocking agents such as dimethyl malonate and methyl acetoacetate; imides such as succinimide and maleic imide Lock agent; urea blocking agents; N- phenylcarbamate type blocking agents of phenyl carbamate, and the like; diphenylamine, amine blocking agents such as aniline, ethylene imine, etc. imine blocking agents such as polyethyleneimine.
As an isocyanate group blocking agent, an oxime blocking agent and a pyrazole blocking agent are preferable, and those represented by the following formula (5) are more preferable.

Examples of the alkyl group having 1 to 8 carbon atoms in R ⁶ and R ⁷ in the formula (5) include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, s-butyl, t-butyl, pentyl, hexyl, and octyl. And linear or branched alkyl groups such as groups. Among these, a linear or branched alkyl group having 1 to 4 carbon atoms such as methyl, ethyl, and propyl groups is preferable. Examples of the ring in which R ⁶ and R ⁷ are bonded to each other together with the adjacent carbon atom include a cycloalkane having about 3 to 12 members (preferably 5 or 6 members) such as a cyclobutane ring, a cyclopentane ring, and a cyclohexane ring. A ring etc. are mentioned.

  Specific examples of the monomer component m1 represented by the formula (1) include 2- [O- (1'-methylpropylideneamino) carboxyamino] ethyl methacrylate (= 2- (1-methylpropylideneamino). (Oxycarbonylaminoethyl) methacrylate) (represented by the following formula (6)), 2- (3,5-dimethylpyrazol-1-yl) carbonylaminoethyl methacrylate (represented by the following formula (7)) ) And the like.

  The content of the monomer component m1 in the polymer M (value obtained by conversion in terms of the weight of the monomer used for polymer synthesis) is 1 wt% or more and 99 wt% or less (for example, 10 wt% or more and 95 wt% or less). It is preferably 20 wt% or more and 90 wt% or less, more preferably 25 wt% or more and 88 wt% or less. When the content of the monomer component m1 in the polymer M is a value within the above range, the above-described effects can be obtained without inhibiting the functions of the monomer components m2, m3 and the like described later in detail. It can be remarkably expressed. On the other hand, when the content of the monomer component m1 in the polymer M is less than the lower limit, the effect of including the monomer component m1 may not be sufficiently exhibited. On the other hand, if the content of the monomer component m1 in the polymer M exceeds the upper limit, the content of the monomer components m2, m3, etc. may be relatively decreased, and these functions may not be sufficiently exhibited. There is sex. In addition, when the polymer M contains a plurality of types of monomer components m1, it is preferable that the sum of the content ratios of the plurality of types of monomer components m1 satisfies the above conditions. When the polymer M is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds is used as the content value of the monomer component m1. can do. Moreover, when the polymer M is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component m1 with the content as described above.

(Monomer component m2)
The polymer M contains a monomer component m2 having a carboxyl group or an acid anhydride group as a monomer component. The polymer M constituting the color filter ink may include a plurality of types of monomer components m2 in the molecule.
By including such a monomer component m2 as a monomer component in the polymer M, it is possible to improve the wetting and spreading of the color filter ink onto the substrate, and the incorporation of bubbles and the like A colored portion that is reliably prevented and has excellent adhesion to the substrate can be suitably formed. In addition, when the color filter ink contains a pigment, the dispersion stability of the pigment and the long-term storage stability of the color filter ink are particularly excellent by including the monomer component m2 as the monomer component. It can be. In the case where the color filter ink contains a polymer Z and / or a polymer W as will be described later, the affinity between the polymer M and these polymers (polymer Z, polymer W), phase The solubility can be made sufficiently excellent. As a result, the discharge stability of the color filter ink can be improved, and the colored portion formed using the color filter ink is particularly excellent in transparency (light due to the opacity of the resin material). The reduction in transmittance is more effectively prevented), the adhesion to the substrate is particularly excellent, and problems such as cracks are less likely to occur.

  Examples of the monomer component m2 include unsaturated carboxylic acids or acid anhydrides thereof. Specific examples of the monomer component m2 include α, β-unsaturated carboxylic acids such as acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid, and acid anhydrides thereof (maleic anhydride, itaconic anhydride). Acid) and the like, among which acrylic acid and methacrylic acid (those represented by the following formula (2)) are particularly preferable.

  The content of the monomer component m2 in the polymer M (value obtained by conversion based on the weight of the monomer used for polymer synthesis) is 0.5 wt% or more and 98 wt% or less (for example, 2.5 wt% or more). 70 wt% or less), preferably 3 wt% or more and 50 wt% or less, more preferably 5 wt% or more and 40 wt% or less. When the content rate of the monomer component m2 in the polymer M is a value within the above range, the above-described monomer component m1 and the monomer component m3 described in detail later are not inhibited, and the above-described functions are prevented. The effect as described above can be expressed more remarkably. On the other hand, when the content of the monomer component m2 in the polymer M is less than the lower limit, the effect of including the monomer component m2 may not be sufficiently exhibited. On the other hand, when the content of the monomer component m2 in the polymer M exceeds the upper limit, the content of the monomer components m1, m3, etc. may be relatively decreased, and these functions may not be sufficiently exhibited. There is sex. In addition, when the polymer M contains a plurality of types of monomer components m2, it is preferable that the sum of the contents of the plurality of types of monomer components m2 satisfies the above-described conditions. Further, when the polymer M is a mixture of plural kinds of compounds, the weighted average value (weighted average value based on the weight ratio) of these compounds is adopted as the content value of the monomer component m2. can do. Moreover, when the polymer M is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component m2 with the content as described above.

(Monomer component m3)
The polymer M contains the monomer component m3 ((meth) acrylic acid ester) represented by the above formula (3) as a monomer component. The polymer M constituting the color filter ink may contain a plurality of monomer components m3 represented by the general formula (3) in the molecule.

  By containing such a monomer component m3 as a monomer component in the polymer M, the flatness of the colored portion formed using the color filter ink can be made high. Further, by containing the monomer component m3 as a monomer component in the polymer M, the discharge stability of the color filter ink can be made excellent. In addition, by containing the monomer component m3 as a monomer component in the polymer M, when the color filter ink includes a pigment, the dispersion stability of the pigment can be improved. The storage stability (long-term storage stability) of the color filter ink can be made excellent.

Examples of the hydrocarbon group having 16 to 25 carbon atoms in R ⁵ include alkyl groups such as hexadecyl (cetyl), heptadecyl, octadecyl (stearyl), nonadecyl, icosyl, docosyl (behenyl) group; 10-cyclohexyldecyl, 12- Groups in which an alicyclic hydrocarbon group such as cyclohexyldodecyl, 14-cyclohexyltetradecyl, 16-cyclohexylhexadecyl and the like are bonded to an alkyl group; 10-phenyldecyl, 12-phenyldodecyl, 14-phenyltetradecyl, 16- Examples include aralkyl groups such as phenylhexadecyl group.

  Examples of the hydrocarbon group-substituted oxy group that the hydrocarbon group having 16 to 25 carbon atoms may have include an alkoxy group such as methoxy and ethoxy group (for example, an alkoxy group having 1 to 10 carbon atoms); a phenoxy group Aryloxy group such as cyclohexyloxy group, alicyclic hydrocarbon group-substituted oxy group such as cyclohexyloxy group, dicyclopentanyloxy group, etc .; ˜12) hydrocarbon group-substituted oxy group and the like.

Specific examples of the monomer component m3 include cetyl (meth) acrylate, stearyl (meth) acrylate, and behenyl (meth) acrylate.
As described above, the number of carbon atoms of the hydrocarbon group (which may have a hydrocarbon group-substituted oxy group) contained in the monomer component m3 constituting the polymer M (hereinafter also referred to as the carbon number of R ⁵ ) Is from 16 to 25, but is particularly preferably from 16 to 22, and more preferably from 16 to 20. Thereby, the effect mentioned above is exhibited more notably. On the other hand, when the carbon number of R ⁵ is less than the lower limit value or exceeds the upper limit value, the excellent effects as described above cannot be obtained.

  The content of the monomer component m3 in the polymer M (value obtained by conversion based on the weight of the monomer used for polymer synthesis) is 0.5 wt% or more and 98 wt% or less (for example, 2.5 wt% or more). 70 wt% or less), preferably 3 wt% or more and 50 wt% or less, more preferably 5 wt% or more and 40 wt% or less. When the content of the monomer component m3 in the polymer M is a value within the above range, the above-described effects are more prominent without inhibiting the functions of the monomer components m1, m2, and the like. Can be expressed. On the other hand, when the content of the monomer component m3 in the polymer M is less than the lower limit, the effect of including the monomer component m3 may not be sufficiently exhibited. On the other hand, if the content of the monomer component m3 in the polymer M exceeds the upper limit, the content of the monomer components m1, m2, etc. may be relatively decreased, and these functions may not be sufficiently exhibited. There is sex. In addition, when the polymer M contains a plurality of types of monomer components m3, it is preferable that the sum of the content ratios of the plurality of types of monomer components m3 satisfies the above conditions. Further, when the polymer M is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds is adopted as the content value of the monomer component m3. can do. Moreover, when the polymer M is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component m3 at the above-described content.

Polymer ratio of the monomer component m1 in _{M (C m1 [wt%]} ) and the monomer ratio of the components _{m2 (C m2 [wt%]} ) , it is preferable to satisfy the following relationship. That is, C _m1 / C _m2 is preferably 2/98 or more and 98/2 or less, more preferably 20/80 or more and 95/5 or less, and 40/60 or more and 95/5 or less. Further preferred.
Further, the ratio of monomer component m1 in polymer M ( _Cm1 [wt%]) and the ratio of monomer component m3 ( _Cm3 [wt%]) preferably satisfy the following relationship. . That is, C _m1 / C _m3 is preferably 2/98 or more and 98/2 or less, more preferably 20/80 or more and 95/5 or less, and 40/60 or more and 95/5 or less. Further preferred.
Examples of the polymer M include those represented by the following formula (8).

  The polymer M may include components other than the monomer components m1, m2, and m3 described above. Thereby, for example, the effects derived from the chemical structures of other monomer components can be obtained while exhibiting the above-described characteristics. Examples of such components include monomer component m4, monomer component m5, monomer component m6, monomer component m7 and the like as described below.

(Monomer component m4)
The polymer M may contain the monomer component m4 ((meth) acrylic acid ester) represented by the following formula (4) as a monomer component.

By including the monomer component m4 in the polymer M, the solubility of the resin material in the color filter ink should be excellent even when the liquid medium described later in detail is highly hydrophilic. The transparency of the colored part formed using the color filter ink can be made excellent.
In the monomer component m4, R ⁹ represents a hydrocarbon group having 1 to 15 carbon atoms which may have a hydrocarbon group-substituted oxy group, and the hydrocarbon group has 1 to 12 carbon atoms. Preferably there is. Examples of the hydrocarbon group represented by R ⁹ include alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, s-butyl, t-butyl, pentyl, hexyl, octyl, 2-ethylhexyl, decyl group; Alicyclic hydrocarbon groups such as cyclohexyl, dicyclopentanyl and isobornyl groups; aryl groups such as phenyl groups; aralkyl groups such as benzyl, 1-phenylethyl and 2-phenylethyl groups; groups in which two or more of these are bonded, etc. Is mentioned.

  Examples of the hydrocarbon group-substituted oxy group that the hydrocarbon group having 1 to 15 carbon atoms may have include an alkoxy group such as a methoxy group and an ethoxy group (for example, an alkoxy group having 1 to 10 carbon atoms); a phenoxy group Aryloxy group such as cyclohexyloxy group, alicyclic hydrocarbon group-substituted oxy group such as cyclohexyloxy group, dicyclopentanyloxy group, etc .; ˜12) hydrocarbon group-substituted oxy group and the like.

  Specific examples of the monomer component m4 include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, phenyl (meth) acrylate, cyclohexyl (meth) acrylate, di Examples include cyclopentanyl (meth) acrylate, dicyclopentanyloxyethyl (meth) acrylate, isobornyl (meth) acrylate, benzyl (meth) acrylate, phenylethyl (meth) acrylate, and the like.

As described above, the carbon number (hereinafter also referred to as the carbon number of R ⁹ ) of the hydrocarbon group (which may have a hydrocarbon group-substituted oxy group) of the monomer component m4 is 1 to 15. Although it is, it is preferable that it is 1-8 especially, and it is more preferable that it is 1-4. Thereby, the effect mentioned above is exhibited more notably.
Examples of the polymer M containing the monomer component m4 as described above include those represented by the following formula (9).

(Monomer component m5)
The polymer M may contain the monomer component m5 which is an aromatic vinyl compound as a monomer component.
When the polymer M contains the monomer component m5, the discharge stability of the color filter ink can be made particularly excellent. In addition, the colored portion formed using the color filter ink is particularly excellent in transparency (a reduction in light transmittance due to the opacity of the resin material is more effectively prevented), and particularly excellent in adhesion to the substrate, Problems such as cracks are particularly difficult to occur.
Specific examples of the monomer component m5 include styrene, α-methylstyrene, vinyl toluene, vinyl naphthalene, vinyl biphenyl, and the like.

(Monomer component m6)
The polymer M may include a monomer component m6 that is a hydroxyl group-containing compound as a monomer component.
When the polymer M contains the monomer component m6, when the color filter ink contains a pigment as a colorant, the dispersion stability of the pigment can be made particularly excellent. Further, a curing reaction of the resin material at the time of forming the colored portion (in particular, in addition to the polymer M, includes at least one selected from the group consisting of a polymer X, a polymer Z, and a polymer W as described in detail later) The curing reaction of the resin material can be progressed more suitably.

  Specific examples of the monomer component m6 include 2-hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, 2,3-dihydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and 6-hydroxy. Polyhydric alcohol and acrylic acid such as hexyl (meth) acrylate, hydroxyalkyl (meth) acrylate such as 8-hydroxyoctyl (meth) acrylate, 4-hydroxymethylcyclohexyl (meth) acrylate, polyalkylene glycol mono (meth) acrylate, etc. Or a compound obtained by ring-opening polymerization of ε-caprolactone to a monoesterified product of methacrylic acid, a monoesterified product of the above polyhydric alcohol and acrylic acid or methacrylic acid, ethylene oxide, or propylene oxide. Ring-opening polymerized hydroxyl containing compounds, and the like to.

(Monomer component m7)
The polymer M may contain the monomer component m7 which is a vinyl compound having a 3- to 5-membered cyclic ether group as a monomer component.
The monomer component m7 (a vinyl compound having a 3- to 5-membered cyclic ether group) includes an oxirane ring (epoxy group) -containing polymerizable unsaturated compound, an oxetane ring (oxetanyl group) -containing polymerizable unsaturated compound, and an oxolane ring. (Oxolanyl group) -containing polymerizable unsaturated compounds are included.
By including the monomer component m7 in the polymer M, it is possible to further improve the hardness of the colored portion formed using the color filter ink, the adhesion to the substrate, and the like.

Examples of the oxirane ring (epoxy group) -containing polymerizable unsaturated compound include oxiranyl (meth) acrylate, glycidyl (meth) acrylate, 2-methylglycidyl (meth) acrylate, 2-ethylglycidyl (meth) acrylate, 2-oxy Polymerizable unsaturated compounds containing an oxirane ring (monocyclic) such as ranylethyl (meth) acrylate, 2-glycidyloxyethyl (meth) acrylate, 3-glycidyloxypropyl (meth) acrylate, glycidyloxyphenyl (meth) acrylate, etc. ((Meth) acrylic acid ester derivatives and the like); 3,4-epoxycyclohexyl (meth) acrylate, 3,4-epoxycyclohexylmethyl (meth) acrylate, 2- (3,4-epoxycyclohexyl) ethyl (meth) acrylate, Epoxy group-containing alicyclic rings such as 3,4-epoxycyclohexane rings such as-(3,4-epoxycyclohexylmethyloxy) ethyl (meth) acrylate and 3- (3,4-epoxycyclohexylmethyloxy) propyl (meth) acrylate Polymerizable unsaturated compounds containing the formula carbocycle ((meth) acrylic acid ester derivatives and the like); 5,6-epoxy- such as 5,6-epoxy-2-bicyclo [2.2.1] heptyl (meth) acrylate Polymerizable unsaturated compounds containing a 2-bicyclo [2.2.1] heptane ring (such as (meth) acrylic acid ester derivatives); epoxidized dicyclopentenyl (meth) acrylate [3,4-epoxytricyclo [5. 2.1.0 ^2,6] decan-9-yl (meth) acrylate, 3,4-epoxytricyclo [5.2.1.0 ^2, ] Decan-8-yl (meth) acrylate or mixtures thereof,], epoxidized dicyclopentenyloxyethyl (meth) acrylate [2- (3,4-epoxytricyclo [5.2.1.0 ^2,6 ] Decan-9-yloxy) ethyl (meth) acrylate, 2- (3,4-epoxytricyclo [5.2.1.0 ^2,6 ] decan-8-yloxy) ethyl (meth) acrylate, or these Mixture], 3,4-epoxy tricyclo [5.2.1.0 ^2,6 ] decane ring such as epoxidized dicyclopentenyloxybutyl (meth) acrylate, epoxidized dicyclopentenyloxyhexyl (meth) acrylate, etc. Examples thereof include polymerizable unsaturated compounds (such as (meth) acrylic acid ester derivatives). As another oxirane ring (epoxy group) -containing polymerizable unsaturated compound, a vinyl ether compound containing an epoxy group, an allyl ether compound containing an epoxy group, an aromatic vinyl compound containing an epoxy group, or the like can also be used. Examples of the aromatic vinyl compound containing an epoxy group include styrene derivatives such as 4-vinylbenzylglycidyl ether, 4-vinylbenzyloxirane, and 4-vinylphenethyloxirane.

  Examples of the oxetane ring (oxetanyl group) -containing polymerizable unsaturated compound include oxetanyl (meth) acrylate, 3-methyl-3-oxetanyl (meth) acrylate, 3-ethyl-3-oxetanyl (meth) acrylate, (3- Methyl-3-oxetanyl) methyl (meth) acrylate, (3-ethyl-3-oxetanyl) methyl (meth) acrylate, 2- (3-methyl-3-oxetanyl) ethyl (meth) acrylate, 2- (3-ethyl -3-Oxetanyl) ethyl (meth) acrylate, 2-[(3-methyl-3-oxetanyl) methyloxy] ethyl (meth) acrylate, 2-[(3-ethyl-3-oxetanyl) methyloxy] ethyl (meta ) Acrylate, 3-[(3-Methyl-3-oxetanyl) methyloxy] propyl Pill (meth) acrylate, 3 - and [(3-ethyl-3-oxetanyl) methyloxy] propyl (meth) acrylate, vinyl ether compounds containing oxetanyl group, allyl ether compounds containing oxetanyl group.

Examples of the oxolane ring (oxolanyl group) -containing polymerizable unsaturated compound include tetrahydrofurfuryl (meth) acrylate, vinyl ether compounds containing an oxolanyl group, and allyl ether compounds containing an oxolanyl group.
When the polymer M constituting the color filter ink contains the monomer component m7 as described above, a 3- to 5-membered cyclic ether group (oxirane ring (epoxy group), oxetane ring (oxetanyl group), oxolane The ring (oxolanyl group)) acts as a curable group. A 3- to 5-membered cyclic ether group mainly contributes to improvement of chemical resistance (solvent resistance, alkali resistance, etc.).

  When the polymer M contains at least one monomer component selected from the group consisting of the monomer components m4, m5, m6 and m7 in addition to the monomer components m1, m2 and m3, The total content of the monomer components m4, m5, m6 and m7 in the polymer M is preferably 60 wt% or less, more preferably 50 wt% or less, and further preferably 40 wt% or less. preferable. Thereby, the effect by including the monomer components m4, m5, m6, and m7 is exhibited while fully exhibiting the effect by including the monomer components m1, m2, and m3.

  The weight average molecular weight of the polymer M is preferably 500 or more and 100000 or less, more preferably 1000 or more and 40000 or less, and further preferably 2000 or more and 30000 or less. As a result, the contrast ratio and lightness of the color filter manufactured using the color filter ink can be made particularly excellent, and the durability of the color filter can be made particularly excellent. In addition, the storage stability (long-term stability), ejection stability, hardness of the colored portion to be formed, and the like of the color filter ink can be improved.

Further, the dispersity (weight average molecular weight Mw / number average molecular weight Mn) of the polymer M is preferably 1 or more and 3 or less.
The content _{C M} of the polymer M in the color filter ink is preferably less 0.5 wt% or more 12 wt%, and more preferably less than 1.0 wt% 9.0 wt%.
As described above, in the present embodiment, the resin material includes the polymer M, but may further include another resin component (polymer).
Examples of such a resin component (polymer) include polymer X, polymer Y, polymer Z, and polymer W as described below.

[Polymer X]
The polymer X includes a monomer component x1 represented by the following formula (11), a monomer component x3 represented by the following formula (13), and a monomer component x4 represented by the following formula (14). Is included. Examples of the polymer X include those represented by the following formula (17).

By including such a polymer X, the color filter while sufficiently improving the switching characteristics of the curing reaction as a whole resin material and the affinity and compatibility of each polymer component in the color filter ink. In particular, the solvent resistance of the colored portion formed using the ink for ink can be made particularly excellent, and the flatness of the surface of the colored portion to be formed can be made particularly high. As a result, it is possible to more reliably prevent color unevenness, density unevenness, contrast reduction, etc. at each part of the color filter manufactured using the color filter ink, and durability and reliability of the color filter. Can be made particularly excellent. Further, when the color filter ink contains the polymer X, the cleaning liquid as described above can more suitably eliminate contamination in the ink flow path of the droplet discharge device and clogging of the droplet discharge head. .
In addition, the polymer X may consist essentially of a single compound, or may be a mixture of a plurality of types of compounds. However, when the polymer X is a mixture of a plurality of types of compounds, each compound contains monomer components x1, x3, and x4.

(Monomer component x1)
The polymer X contains the monomer component x1 represented by the formula (11) as a monomer component.
By containing such a monomer component x1 as a monomer component, an unintentional reaction (polymerization reaction) of the resin material can be reliably prevented during storage of the color filter ink or in the ink application step described later. On the other hand, in the colored part forming step (curing step) performed in a heating environment, the curing reaction (polymerization reaction) of the resin material can be more suitably progressed. That is, by including the monomer component x1, the switching characteristics of the curing reaction for the resin material can be made particularly excellent. Further, by containing the monomer component x1 as the monomer component, for example, the dispersion stability of the pigment particles in the color filter ink can be improved, and the long-term storage stability of the color filter ink. The discharge stability can be made excellent. Moreover, the hardness etc. of the colored part formed can be made excellent by containing the monomer component x1 as a monomer component.

  The content of the monomer component x1 in the polymer X (a value obtained by conversion based on the weight of the monomer used for polymer synthesis) is preferably 30 wt% or more and 90 wt% or less, and 40 wt% or more. More preferably, it is 80 wt% or less. When the content of the monomer component x1 in the polymer X is a value within the above range, the above-described effects can be achieved without inhibiting the functions of the monomer components x2, x3, and x4 described in detail later. It can be expressed more significantly. On the other hand, if the content of the monomer component x1 in the polymer X is less than the lower limit value, the effect of including the monomer component x1 may not be sufficiently exhibited. On the other hand, when the content of the monomer component x1 in the polymer X exceeds the upper limit, the content of the monomer components x2, x3, and x4 is relatively lowered, and these functions are not sufficiently exhibited. there is a possibility. Further, the reaction rate of the polymer X at a high temperature decreases, and it becomes difficult to produce a color filter with sufficiently excellent productivity. In addition, when the polymer X is a mixture of plural kinds of compounds, the weighted average value (weighted average value based on the weight ratio) of these compounds is adopted as the content value of the monomer component x1. can do. Moreover, when the polymer X is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component x1 at the content as described above.

(Monomer component x2)
The polymer X may contain the monomer component x2 represented by the following formula (12) as a monomer component.

By containing such a monomer component x2 as a monomer component (particularly, together with the monomer component x1 described above and the monomer component x3 described in detail later), it is possible to preserve the color filter ink. In the colored part formation process (curing process) performed in a heated environment while reliably preventing unintentional reaction (polymerization reaction) of the resin material in the ink application process or the like described later, the resin material curing reaction (polymerization) Reaction) can proceed more suitably. In particular, in the colored portion forming step (curing step) under a heating environment, the rising of the polymerization reaction of the resin material can be improved, and the polymerization reaction can be continuously advanced. Further, by containing the monomer component x2 as the monomer component, the hardness of the colored portion to be formed can be made particularly excellent.
Examples of the polymer X containing the monomer component x2 as a monomer component include those represented by the following formula (19).

  The content of the monomer component x2 in the polymer X (value obtained by conversion in terms of the weight of the monomer used for polymer synthesis) is preferably 5 wt% or more and 60 wt% or less, preferably 10 wt% or more. More preferably, it is 50 wt% or less. When the content of the monomer component x2 in the polymer X is a value within the above range, without inhibiting the functions of the monomer component x1 and the monomer components x3 and x4 described in detail later, The effects as described above can be expressed more remarkably. On the other hand, when the content of the monomer component x2 in the polymer X is less than the lower limit, the effect of including the monomer component x2 may not be sufficiently exhibited. On the other hand, when the content of the monomer component x2 in the polymer X exceeds the upper limit, the content of the monomer components x1, x3, and x4 is relatively lowered, and these functions are not sufficiently exhibited. there is a possibility. In addition, the reactivity of the polymer X at a relatively low temperature increases, and the storage stability of the color filter ink tends to decrease. In addition, when the polymer X is a mixture of a plurality of kinds of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds is adopted as the content value of the monomer component x2. can do. Moreover, when the polymer X is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component x2 at the above-described content.

(Monomer component x3)
The polymer X contains the monomer component x3 represented by the above formula (13) as a monomer component.
By containing the monomer component x3 as the monomer component, the chemical resistance, solvent resistance, and the like of the colored portion to be formed can be made particularly excellent. Thus, after the colored portion forming step (curing step), chemical application and washing (especially washing with N-methyl-2-pyrrolidone, γ-butyrolactone, isopropyl alcohol, hydrochloric acid, aqueous sodium hydroxide, etc.), etc. Even when post-processing is performed, the occurrence of adverse effects due to these can be reliably prevented.

Further, the monomer component x3 has a sufficiently low reactivity at a relatively low temperature (for example, 100 ° C. or lower) in the polymer X, similarly to the monomer component x1 described above. Under a heating environment such as a heat treatment applied in the forming step (curing step), the substrate exhibits sufficient reactivity. For this reason, in the coloring part formation process (curing process) performed in a heating environment while reliably preventing unintentional reaction (polymerization reaction) of the resin material during storage of the color filter ink or in the ink application process described later. Can suitably advance the curing reaction (polymerization reaction) of the resin material.
Further, by containing the monomer component x3 as a monomer component, for example, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent, and the color filter ink can be stored for a long time. And discharge stability can be made particularly excellent.

  The content of the monomer component x3 in the polymer X (value obtained by conversion in terms of the weight of the monomer used for polymer synthesis) is preferably 2 wt% or more and 20 wt% or less, preferably 3 wt% or more. More preferably, it is 15 wt% or less. When the content of the monomer component x3 in the polymer X is a value within the above range, without inhibiting the functions of the monomer components x1, x2 and the monomer component x4 described in detail later, The effects as described above can be expressed more remarkably. On the other hand, when the content of the monomer component x3 in the polymer X is less than the lower limit, the effect of including the monomer component x3 may not be sufficiently exhibited. On the other hand, when the content of the monomer component x3 in the polymer X exceeds the upper limit, the content of the monomer components x1, x2, and x4 is relatively lowered, and these functions are not sufficiently exhibited. there is a possibility. In addition, the colored portion formed using the color filter ink becomes too hard, and the tendency to follow the deformation of the substrate or the like accompanying a change in temperature appears. In addition, when the polymer X is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) of these compounds is adopted as the content value of the monomer component x3. can do. Moreover, when the polymer X is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component x3 with the content as described above.

(Monomer component x4)
The polymer X contains the monomer component x4 represented by the formula (14) as a monomer component.
By containing such a monomer component x4 as a monomer component, the solid content concentration is increased when the liquid medium is removed from the color filter ink applied on the substrate during the formation of the colored portion. As a result, the thixotropic property and viscosity of the color filter ink are increased, and it is possible to more reliably prevent the occurrence of unintended irregularities on the surface of the formed colored portion.

Moreover, the monomer component x4 has a hydroxyl group at the terminal. By having such a structure, the reaction at a relatively low temperature (for example, 100 ° C. or less) is sufficiently low, and the reaction is performed in a heating environment such as a heat treatment performed in the colored portion forming step (curing step). The sex can be further enhanced. By this, in the colored part forming step (curing step) performed in a heating environment while reliably preventing unintentional reaction (polymerization reaction) of the resin material during storage of the color filter ink or in the ink application step described later Can advance the curing reaction (polymerization reaction) of the resin material more suitably.
Further, by containing the monomer component x4 as the monomer component, for example, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent, and the color filter ink can be stored for a long time. And discharge stability can be made particularly excellent.

  The content of the monomer component x4 in the polymer X (value obtained by conversion in terms of the weight of the monomer used for polymer synthesis) is preferably 2 wt% or more and 20 wt% or less, preferably 3 wt% or more. More preferably, it is 15 wt% or less. When the content of the monomer component x4 in the polymer X is a value within the above range, the above-described effects are more remarkable without inhibiting the functions of the monomer components x1, x2, and x3. Can be expressed. On the other hand, when the content of the monomer component x4 in the polymer X is less than the lower limit, the effect due to the inclusion of the monomer component x4 may not be sufficiently exhibited. On the other hand, when the content of the monomer component x4 in the polymer X exceeds the upper limit, the content of the monomer components x1, x2, and x3 is relatively lowered, and these functions are not sufficiently exhibited. there is a possibility. Moreover, the tendency for the hardness of the colored part formed using the ink for color filters to fall appears. In addition, when the polymer X is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) of these compounds is used as the content value of the monomer component x4. can do. Moreover, when the polymer X is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component x4 with the content as described above.

The polymer X may include a monomer component (other monomer component) other than the monomer components x1, x2, x3, and x4 described above. Thereby, for example, the effects derived from the chemical structures of other monomer components can be obtained while exhibiting the above-described characteristics.
When the polymer X contains other monomer components (monomer components other than the monomer components x1, x2, x3, x4), the content of other monomer components in the polymer X ( When a plurality of other monomer components are included, the sum of these contents) is preferably 15 wt% or less, and more preferably 10 wt% or less.

The weight average molecular weight of the polymer X is preferably 1000 or more and 50000 or less, more preferably 1200 or more and 10,000 or less, and further preferably 1500 or more and 5000 or less. As a result, it is possible to make the color filter ink stable over time (long-term storage stability), the discharge stability of the color filter ink, and the color filter productivity sufficiently. Furthermore, the flatness of the colored portion formed using the color filter ink can be made more reliable, and the occurrence of color unevenness in the image displayed using the color filter can be more effectively achieved. Can be prevented.
Further, the dispersity (weight average molecular weight Mw / number average molecular weight Mn) of the polymer X is preferably 1 or more and 3 or less.

[Polymer Y]
The polymer Y includes a monomer component y1 represented by the following formula (15). Examples of the polymer Y include those represented by the following formula (18).

By including such a polymer Y, the discharge stability of the color filter ink, the dispersion stability of the pigment in the color filter, and the like can be improved, while the colored portion formed using the color filter ink The adhesion to the substrate can be made particularly excellent, and the durability and reliability of the produced color filter can be made particularly excellent. Further, when the color filter ink contains the polymer Y, the cleaning liquid as described above can more suitably eliminate contamination in the ink flow path of the droplet discharge device and clogging of the droplet discharge head. .
The polymer Y may be substantially composed of a single compound, or may be a mixture of a plurality of types of compounds. However, when the polymer Y is a mixture of a plurality of types of compounds, each compound contains the monomer component y1.

(Monomer component y1)
The polymer Y contains the monomer component y1 represented by the above formula (15) as a monomer component.
By including such a monomer component y1 as the monomer component, the adhesion of the formed colored portion to the substrate can be made particularly excellent. As a result, the durability of the color filter can be made particularly excellent.

  The content of the monomer component y1 in the polymer Y (value obtained by conversion in terms of the weight of the monomer used for polymer synthesis) is preferably 30 wt% or more and 90 wt% or less, and 40 wt% or more. More preferably, it is 80 wt% or less. When the content of the monomer component y1 in the polymer Y is a value within the above range, for example, when the polymer Y includes the monomer component y2 described in detail later as the monomer component, the unit The effects as described above can be expressed more significantly without inhibiting the function of the monomer component y2. On the other hand, when the content of the monomer component y1 in the polymer Y is less than the lower limit value, the effect of including the monomer component y1 may not be sufficiently exhibited. On the other hand, when the content of the monomer component y1 in the polymer Y exceeds the upper limit, for example, when the polymer Y includes the monomer component y2 described in detail later as the monomer component, Accordingly, the content of the monomer component y2 may be reduced, and the function of the monomer component y2 may not be sufficiently exhibited. In addition, when the colored portion is formed, when the liquid medium is removed from the color filter ink applied on the substrate, the viscosity of the color filter ink tends to increase as the solid content concentration increases. Involuntary irregularities are likely to occur on the surface of the colored portion. In addition, when the polymer Y is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds is adopted as the content value of the monomer component y1. can do. Moreover, when the polymer Y is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component y1 at the content as described above.

(Monomer component y2)
The polymer Y may contain the monomer component y2 represented by the following formula (16) as a monomer component.

  By containing such a monomer component y2 as a monomer component (particularly, together with the above-described monomer component y1), the resin in the storage of the color filter ink or in the ink application step described later, etc. In the colored part forming step (curing step) performed in a heating environment while preventing unintentional reaction (polymerization reaction) of the material more reliably, the curing reaction (polymerization reaction) of the resin material can be suitably advanced. it can. In particular, in the colored portion forming step (curing step) under a heating environment, the rising of the polymerization reaction of the resin material can be improved, and the polymerization reaction can be continuously advanced. Moreover, the hardness etc. of the colored part formed can be made excellent by containing the monomer component y2 as a monomer component.

Further, when the polymer Y contains the monomer component y2, the affinity and compatibility with the polymer M, the polymer X, and the like can be sufficiently improved. As a result, the discharge stability of the color filter ink can be made excellent, and the colored portion formed using the color filter ink has excellent transparency (light transmission due to the opacity of the resin material). Rate is prevented), adhesion to the substrate is particularly excellent, and problems such as cracks are less likely to occur. On the other hand, when the monomer component y2 is not contained as the monomer component, the affinity with the polymer M and the compatibility cannot be sufficiently improved, and the color filter ink is ejected. The color filter produced is inferior in stability, and color unevenness and density unevenness are likely to occur, making it difficult to sufficiently improve contrast, durability, reliability, and the like.
An example of the polymer Y containing the monomer component y2 as a monomer component is represented by the following formula (20).

  The content of the monomer component y2 in the polymer Y (value obtained by conversion based on the weight of the monomer used for polymer synthesis) is preferably 10 wt% or more and 70 wt% or less, and more preferably 20 wt% or more. More preferably, it is 60 wt% or less. When the content of the monomer component y2 in the polymer Y is a value within the above range, the above-described effects can be expressed more significantly without inhibiting the function of the monomer component y1 described above. Can do. On the other hand, when the content of the monomer component y2 in the polymer Y is less than the lower limit value, the effect of including the monomer component y2 may not be sufficiently exhibited. On the other hand, when the content of the monomer component y2 in the polymer Y exceeds the upper limit, the content of the monomer component y1 is relatively lowered, and the function of the monomer component y1 is not sufficiently exhibited. there is a possibility. In addition, the reactivity of the polymer Y at a relatively low temperature increases, and the storage stability of the color filter ink tends to decrease. In addition, when the polymer Y is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds is adopted as the content value of the monomer component y2. can do. Moreover, when the polymer Y is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component y2 with the content as described above.

The polymer Y may include monomer components (other monomer components) other than the monomer components y1 and y2 described above. Thereby, for example, the effects derived from the chemical structures of other monomer components can be obtained while exhibiting the above-described characteristics.
When the polymer Y contains other monomer components (monomer components other than the monomer components y1 and y2), the content of other monomer components in the polymer Y (multiple types of other components) In the case where the monomer component is included, the sum of these content ratios) is preferably 15 wt% or less, and more preferably 10 wt% or less.

The weight average molecular weight of the polymer Y is preferably 1000 or more and 50000 or less, more preferably 1200 or more and 10,000 or less, and further preferably 1500 or more and 5000 or less. As a result, it is possible to make the color filter ink stable over time (long-term storage stability), the discharge stability of the color filter ink, and the color filter productivity sufficiently. Furthermore, the flatness of the colored portion formed using the color filter ink can be made more reliable, and the occurrence of color unevenness in the image displayed using the color filter can be more effectively achieved. Can be prevented.
Moreover, it is preferable that the dispersion degree (weight average molecular weight Mw / number average molecular weight Mn) of the polymer Y is 1 or more and 3 or less.

[Polymer Z]
The polymer Z includes a monomer component z1 represented by the following formula (21), a monomer component z2 represented by the following formula (22), and a monomer component z3 represented by the following formula (23): Is included. Examples of the polymer Z include those represented by the following formula (24).

By including such a polymer Z, the switching characteristics of the curing reaction as the resin material, the discharge stability of the color filter ink, the hardness of the colored portion to be formed, and the like can be made particularly excellent. When a pigment is included as the colorant, the dispersion stability of the pigment in the color filter ink can be made particularly excellent. Moreover, by including the polymer Z, it is possible to more effectively prevent unintended irregularities from occurring on the surface of the colored portion formed using the color filter ink. It is possible to more effectively prevent the occurrence of color unevenness and density unevenness and a decrease in contrast ratio in the displayed image. In addition, when the color filter ink contains the polymer Z, the cleaning liquid as described above can more suitably eliminate contamination in the ink flow path of the droplet discharge device and clogging of the droplet discharge head. .
The polymer Z may be substantially composed of a single compound, or may be a mixture of a plurality of types of compounds. However, when the polymer Z is a mixture of a plurality of types of compounds, each compound contains monomer components z1, z2, and z3.

(Monomer component z1)
The polymer Z contains the monomer component z1 represented by the formula (21) as a monomer component.
By containing such a monomer component z1 as a monomer component, an unintentional reaction (polymerization reaction) of the resin material can be reliably prevented during storage of the color filter ink or in the ink application process described later. On the other hand, in the colored part forming step (curing step) performed in a heating environment, the curing reaction (polymerization reaction) of the resin material can be more suitably progressed. That is, the switching characteristics of the curing reaction for the resin material can be made excellent. Further, by containing the monomer component z1 as a monomer component, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent, and the long-term storage stability of the color filter ink, The discharge stability can be made particularly excellent. In addition, the monomer component z1 in the polymer Z is excellent in reactivity under a high temperature environment, but has extremely excellent stability against mechanical force. Moreover, the hardness etc. of the colored part formed can be made excellent by containing the monomer component z1 as a monomer component.

  In addition, when the polymer Z contains the monomer component z1, the affinity and compatibility between the polymer Z and the polymer M and the like can be made sufficiently excellent. As a result, the discharge stability of the color filter ink can be made excellent, and the colored portion formed using the color filter ink is particularly excellent in transparency (light due to the opacity of the resin material). The reduction in transmittance is more effectively prevented), the adhesion to the substrate is particularly excellent, and problems such as cracks are less likely to occur.

  The content of the monomer component z1 in the polymer Z (value obtained by conversion in terms of the weight of the monomer used for the synthesis of the polymer) is preferably 50 wt% or more and 95 wt% or less, preferably 60 wt% or more. More preferably, it is 85 wt% or less. When the content of the monomer component z1 in the polymer Z is a value within the above range, the above-described effects are more prominent without inhibiting the functions of the monomer components z2 and z3 described in detail later. Can be expressed. In addition, when the polymer Z is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds is adopted as the content value of the monomer component z1. can do. Moreover, when the polymer Z is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component z1 at the content as described above.

(Monomer component z2)
The polymer Z contains the monomer component z2 represented by the above formula (22) as a monomer component.
By containing such a monomer component z2 as a monomer component, wetting and spreading of the color filter ink onto the substrate can be improved, and mixing of bubbles and the like is reliably prevented, A colored portion having excellent adhesion to the substrate can be suitably formed. When the color filter ink contains a pigment and a dispersant, the dispersion stability of the dispersant can be made particularly excellent by containing the monomer component z2 as the monomer component. As a result, the pigment dispersion stability and the long-term storage stability of the color filter ink can be made particularly excellent.

  The content of the monomer component z2 in the polymer Z (value obtained by conversion in terms of the weight of the monomer used for the synthesis of the polymer) is preferably 3 wt% or more and 35 wt% or less, preferably 10 wt% or more. More preferably, it is 25 wt% or less. When the content of the monomer component z2 in the polymer Z is a value within the above range, the above-described monomer component z1 and the above-described monomer component z3 described in detail later are not impaired. Such an effect can be expressed more remarkably. In addition, when the polymer Z is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) of these compounds is adopted as the content value of the monomer component z2. can do. Moreover, when the polymer Z is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component z2 at the content as described above.

(Monomer component z3)
The polymer Z contains the monomer component z3 represented by the formula (23) as a monomer component.
Such a monomer component z3 is a component that contributes to the curing of the resin material in the coloring portion forming step (curing step) described later, similarly to the monomer components x1, x2, z1, and the like described above. While the monomer components x1, x2, and z1 have a function of increasing the hardness of the colored portion to be formed, the monomer component z3 has an appropriate flexibility in the formed colored portion. Even if deformation (for example, thermal expansion, thermal contraction, etc.) occurs in the substrate on which the colored portion is provided, the function of following the deformation and maintaining the adhesion of the colored portion to the substrate, etc. Have. As a result, for example, even when the manufactured color filter is repeatedly exposed to a rapid temperature change accompanying image display, good adhesion can be maintained, and problems such as light leakage (white spots, bright spots), etc. Can be prevented more reliably. That is, the durability of the color filter can be made particularly excellent.

The monomer component z3 is not sufficiently reactive at a relatively low temperature (for example, 100 ° C. or lower) in the polymer Z, whereas the monomer component z3 is a heat treatment applied in the colored portion forming step (curing step). In a heating environment, it has sufficient reactivity. For this reason, in the coloring part formation process (curing process) performed in a heating environment while reliably preventing unintentional reaction (polymerization reaction) of the resin material during storage of the color filter ink or in the ink application process described later. Can suitably advance the curing reaction (polymerization reaction) of the resin material.
In addition, by containing the monomer component z3 as a monomer component, the solid content concentration is increased when the liquid medium is removed from the color filter ink applied on the substrate during the formation of the colored portion. Along with this, the thixotropic property and viscosity of the color filter ink are increased, and it is possible to reliably prevent the occurrence of unintended irregularities on the surface of the colored portion to be formed.

  The content of the monomer component z3 in the polymer Z (value obtained by conversion in terms of the weight of the monomer used for polymer synthesis) is preferably 2 wt% or more and 30 wt% or less, preferably 5 wt% or more. More preferably, it is 20 wt% or less. When the content of the monomer component z3 in the polymer Z is a value within the above range, the above-described effects are more remarkably exhibited without inhibiting the functions of the monomer components z1 and z2. Can be made. In addition, when the polymer Z is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds is adopted as the content value of the monomer component z3. can do. Moreover, when the polymer Z is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component z3 at the above-described content.

The weight average molecular weight of the polymer Z is preferably 5000 or more and 50000 or less, and more preferably 6000 or more and 15000 or less. As a result, it is possible to make the color filter ink stable over time (long-term storage stability), the discharge stability of the color filter ink, and the color filter productivity sufficiently. Furthermore, the flatness of the colored portion formed using the color filter ink can be made more reliable, and the occurrence of color unevenness in the image displayed using the color filter can be more effectively achieved. Can be prevented.
Further, the dispersity (weight average molecular weight Mw / number average molecular weight Mn) of the polymer Z is preferably 1 or more and 3 or less.

[Polymer W]
The polymer W includes a monomer component w1 represented by the following formula (25), a monomer component w2 represented by the following formula (26), and a monomer component w3 represented by the following formula (27): And a monomer component w4 represented by the following formula (28). An example of the polymer W is represented by the following formula (29).

By including such a polymer W, the switching characteristics of the curing reaction as the resin material, the ejection stability of the color filter ink, the hardness of the colored portion to be formed, and the like can be made particularly excellent. When a pigment is included as a colorant, the dispersion stability of the pigment in the color filter ink can be made particularly excellent. In addition, by including the polymer W, it is possible to more effectively prevent unintentional irregularities from occurring on the surface of the colored portion formed using the color filter ink. It is possible to more effectively prevent the occurrence of color unevenness and density unevenness and a decrease in contrast ratio in the displayed image. Further, when the color filter ink contains the polymer W, the cleaning liquid as described above can more suitably eliminate contamination in the ink flow path of the droplet discharge device and clogging of the droplet discharge head. .
The polymer W may be substantially composed of a single compound, or may be a mixture of a plurality of types of compounds. However, when the polymer W is a mixture of a plurality of types of compounds, each compound contains monomer components w1, w2, w3, and w4.

(Monomer component w1)
The polymer W contains the monomer component w1 represented by the formula (25) as a monomer component.
By containing such a monomer component w1 as a monomer component, unintentional reaction (polymerization reaction) of the resin material can be reliably prevented during storage of the color filter ink or in the ink application step described later. On the other hand, in the colored part forming step (curing step) performed in a heating environment, the curing reaction (polymerization reaction) of the resin material can be more suitably progressed. That is, the switching characteristics of the curing reaction for the resin material can be made excellent. Further, by containing the monomer component w1 as a monomer component, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent, and the long-term storage stability of the color filter ink, The discharge stability can be made particularly excellent. In addition, the monomer component w1 is excellent in reactivity in a high-temperature environment in the polymer W, but has extremely excellent stability against mechanical force. Moreover, the hardness etc. of the colored part formed can be made excellent by containing the monomer component w1 as a monomer component.

  In addition, when the polymer W contains the monomer component w1, the affinity and compatibility between the polymer W and the polymer M and the like can be sufficiently improved. As a result, the discharge stability of the color filter ink can be made excellent, and the colored portion formed using the color filter ink is particularly excellent in transparency (light due to the opacity of the resin material). The reduction in transmittance is more effectively prevented), the adhesion to the substrate is particularly excellent, and problems such as cracks are less likely to occur.

  The content of the monomer component w1 in the polymer W (value obtained by conversion based on the weight of the monomer used for polymer synthesis) is preferably 25 wt% or more and 75 wt% or less, and 40 wt% or more. More preferably, it is 60 wt% or less. When the content of the monomer component w1 in the polymer W is a value within the above range, the above-described effects can be achieved without inhibiting the functions of the monomer components w2, w3, and w4 described in detail later. It can be expressed more significantly. In addition, when the polymer W is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds is adopted as the content value of the monomer component w1. can do. Moreover, when the polymer W is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component w1 at the content as described above.

(Monomer component w2)
The polymer W contains the monomer component w2 represented by the above formula (26) as a monomer component.
By including such a monomer component w2 as a monomer component, it is possible to improve the wetting and spreading of the color filter ink on the substrate, and mixing of bubbles and the like is reliably prevented, A colored portion having excellent adhesion to the substrate can be suitably formed. When the color filter ink contains a pigment and a dispersant, the dispersion stability of the dispersant can be made particularly excellent by containing the monomer component w2 as the monomer component. As a result, the pigment dispersion stability and the long-term storage stability of the color filter ink can be made particularly excellent.

  The content of the monomer component w2 in the polymer W (value obtained by conversion in terms of the weight of the monomer used for polymer synthesis) is preferably 2 wt% or more and 25 wt% or less, preferably 5 wt% or more. More preferably, it is 15 wt% or less. When the content of the monomer component w2 in the polymer W is a value within the above range, without inhibiting the functions of the monomer component w1 and the monomer components w3 and w4 described in detail later, The effects as described above can be expressed more remarkably. In addition, when the polymer W is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds is used as the content value of the monomer component w2. can do. Moreover, when the polymer W is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component w2 at the content as described above.

(Monomer component w3)
The polymer W contains the monomer component w3 represented by the above formula (27) as a monomer component.
By including the monomer component w3 as the monomer component, the chemical resistance, solvent resistance, and the like of the colored portion to be formed can be made particularly excellent. Thus, after the colored portion forming step (curing step), chemical application and washing (especially washing with N-methyl-2-pyrrolidone, γ-butyrolactone, isopropyl alcohol, hydrochloric acid, aqueous sodium hydroxide, etc.), etc. Even when post-processing is performed, the occurrence of adverse effects due to these can be more reliably prevented.

In addition, the monomer component w3 has a sufficiently low reactivity at a relatively low temperature (for example, 100 ° C. or less) in the polymer (polymer W), whereas in the colored portion forming step (curing step). Under a heating environment such as a heat treatment to be applied, it has sufficient reactivity. For this reason, in the coloring part formation process (curing process) performed in a heating environment while reliably preventing unintentional reaction (polymerization reaction) of the resin material during storage of the color filter ink or in the ink application process described later. Can suitably advance the curing reaction (polymerization reaction) of the resin material.
Further, by containing the monomer component w3 as a monomer component, for example, when the color filter ink contains a pigment as a colorant, the dispersion stability of the pigment particles in the color filter ink is particularly excellent. The long-term storage stability and ejection stability of the color filter ink can be improved.

  The content of the monomer component w3 in the polymer W (value obtained by conversion in terms of the weight of the monomer used for the synthesis of the polymer) is preferably 5 wt% or more and 50 wt% or less, preferably 10 wt% or more. More preferably, it is 40 wt% or less. When the content of the monomer component w3 in the polymer W is a value within the above range, without inhibiting the functions of the monomer components w1 and w2 described above and the monomer component w4 described in detail later, The effects as described above can be expressed more remarkably. In addition, when the polymer W is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) of these compounds is used as the content value of the monomer component w3. can do. Moreover, when the polymer W is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component w3 at the above-described content.

(Monomer component w4)
The polymer W contains the monomer component w4 represented by the above formula (28) as a monomer component.
By including such a monomer component w4 as a monomer component, the solid content concentration is increased when the liquid medium is removed from the color filter ink applied on the substrate during the formation of the colored portion. As a result, the thixotropic property and viscosity of the color filter ink are increased, and it is possible to more reliably prevent the occurrence of unintended irregularities on the surface of the formed colored portion.

  Further, by containing the monomer component w4 as a monomer component, the hydrophobicity of the entire resin material can be suitably adjusted, and the affinity and compatibility of each polymer constituting the resin material are particularly good. It can be excellent. As a result, the discharge stability of the color filter ink can be made particularly excellent, and the colored portion formed using the color filter ink has excellent transparency (light due to the opacity of the resin material). The decrease in transmittance is prevented), and the adhesion to the substrate is particularly excellent, and problems such as cracks are less likely to occur.

  The content of the monomer component w4 in the polymer W (value obtained by conversion based on the weight of the monomer used for polymer synthesis) is preferably 3 wt% or more and 40 wt% or less, preferably 5 wt% or more. More preferably, it is 30 wt% or less. When the content of the monomer component w4 in the polymer W is a value within the above range, the above-described effects are more remarkable without inhibiting the functions of the monomer components w1, w2, and w3. Can be expressed. In addition, when the polymer W is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) of these compounds is used as the content value of the monomer component w4. can do. Moreover, when the polymer W is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component w4 at the above-described content.

  The weight average molecular weight of the polymer W is preferably 5000 or more and 50000 or less, and more preferably 6000 or more and 15000 or less. As a result, it is possible to make the color filter ink stable over time (long-term storage stability), the discharge stability of the color filter ink, and the color filter productivity sufficiently. Furthermore, the flatness of the colored portion formed using the color filter ink can be made more reliable, and the occurrence of color unevenness in the image displayed using the color filter can be more effectively achieved. Can be prevented.

Further, the dispersity (weight average molecular weight Mw / number average molecular weight Mn) of the polymer W is preferably 1 or more and 3 or less.
In addition, each polymer mentioned above should just have the structure (each partial structure corresponding to each monomer component) as mentioned above, and it synthesize | combines using each monomer component itself mentioned above. It may be synthesized, or may be synthesized using a component (precursor, derivative, etc.) different from the monomer component described above.

The content of the resin material in the color filter ink is preferably 0.5 wt% or more and 18 wt% or less, more preferably 1 wt% or more and 15 wt% or less, and 3 wt% or more and 12 wt% or less. Is more preferable.
When the content of the resin material in the color filter ink is C _R [wt%] and the content of the colorant in the color filter ink is C _C [wt%], 0.2 ≦ C _R / The relationship of C _C ≦ 9.0 is preferably satisfied, the relationship of 0.3 ≦ C _R / C _C ≦ 5.0 is more preferably satisfied, and 0.4 ≦ C _R / C _C ≦ 3. It is more preferable that the relationship 5 is satisfied. By satisfying such a relationship, the contrast of the manufactured color filter can be improved, and sufficient contrast can be ensured even when the thickness of the colored portion is made thinner. can do.
The resin material constituting the color filter ink is a polymer other than those described above (for example, a thermoplastic polymer or a curable polymer other than the above-described polymers M, X, Y, Z, and W). It may be included.

<Liquid medium>
The liquid medium (liquid medium) has a function of dissolving and / or dispersing the colorant and the like as described above. That is, the liquid medium functions as a solvent and / or a dispersion medium. In general, most of the liquid medium is removed in the process of manufacturing the color filter.

  As the liquid medium constituting the color filter ink, for example, ester compounds, ether compounds, hydroxy ketones, carbonic acid diesters, cyclic amide compounds and the like can be used. Among them, [1] polyhydric alcohols (for example, ethylene glycol) , Propylene glycol, butylene glycol, glycerin, etc.) condensates (polyhydric alcohol ethers), polyhydric alcohols or alkyl ethers of polyhydric alcohol ethers (eg, methyl ether, ethyl ether, butyl ether, hexyl ether, etc.) , Esters (eg, formate, acetate, propionate, etc.), [2] esters of polyvalent carboxylic acids (eg, succinic acid, glutaric acid, etc.) (eg, methyl esters), [3] at least one hydroxyl group in the molecule When Ether compounds having one carboxyl group even without (hydroxy acid), esters and the like, (4) polyhydric alcohol and carbonic acid diester having a chemical structure as obtained in the reaction with phosgene is preferred. Examples of the compound that can be used as the liquid medium include 2- (2-methoxy-1-methylethoxy) -1-methylethyl acetate, triethylene glycol dimethyl ether, triethylene glycol diacetate, diethylene glycol monoethyl ether acetate, 4-methyl-1,3-dioxolan-2-one, bis (2-butoxyethyl) ether, dimethyl glutarate, ethylene glycol di-n-butylate, 1,3-butylene glycol diacetate, diethylene glycol monobutyl ether acetate, methylpropylene Triglycol, tetraethylene glycol dimethyl ether, 1,6-diacetoxyhexane, tripropylene glycol monomethyl ether, butoxypropanol, diethyleneglycol Methyl ethyl ether, diethylene glycol methyl butyl ether, triethylene glycol methyl ethyl ether, triethylene glycol methyl butyl ether, dipropylene glycol monomethyl ether acetate, diethylene glycol dimethyl ether, diethylene glycol ethyl methyl ether, 3-methoxybutyl acetate, diethylene glycol diethyl ether, ethyl octoate, Ethylene glycol monobutyl ether acetate, ethylene glycol monobutyl ether, cyclohexyl acetate, diethyl succinate, ethylene glycol diacetate, propylene glycol diacetate, 4-hydroxy-4-methyl-2-pentanone, dimethyl succinate, 1-butoxy-2- Propanol, diethylene Recall monoethyl ether, diethylene glycol monomethyl ether, dipropylene glycol monomethyl ether, 3-methoxy-n-butyl acetate, diacetin, dipropylene glycol mono n-propyl ether, polyethylene glycol monomethyl ether, butyl glycolate, ethylene glycol monohexyl ether, Dipropylene glycol mono n-butyl ether, N-methyl-2-pyrrolidone, triethylene glycol butyl methyl ether, bis (2-propoxyethyl) ether, diethylene glycol diacetate, diethylene glycol butyl methyl ether, diethylene glycol butyl ethyl ether, diethylene glycol butyl propyl ether , Diethylene glycol ethyl propyl ether Diethylene glycol methyl propyl ether, diethylene glycol propyl ether acetate, triethylene glycol methyl ether acetate, triethylene glycol ethyl ether acetate, triethylene glycol propyl ether acetate, triethylene glycol butyl ether acetate, triethylene glycol butyl ethyl ether, triethylene glycol ethyl Methyl ether, triethylene glycol ethyl propyl ether, triethylene glycol methyl propyl ether, dipropylene glycol methyl ether acetate, n-nonyl alcohol, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, ethylene glycol 2-ethylhexyl ether Examples include triethylene glycol monoethyl ether, diethylene glycol monohexyl ether, triethylene glycol monobutyl ether, diethylene glycol mono-2-ethylhexyl ether, tripropylene glycol mono n-butyl ether, butyl cellosolve acetate, and one or two selected from these A combination of more than one species can be used.

  Among them, as the liquid medium, 1,3-butylene glycol diacetate, bis (2-butoxyethyl) ether, 2- (2-methoxy-1-methylethoxy) -1-methylethyl acetate, methylpropylene triglycol, It is preferably one or two or more selected from the group consisting of diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether, diethylene glycol diethyl ether and diethylene glycol monobutyl ether acetate, and is mainly composed of compounds constituting the above group. More preferably. As a result, the dissolved state of the resin material in the color filter ink can be made more uniform, and the discharge stability of the color filter ink becomes particularly excellent, and is displayed using the manufactured color filter. In particular, the contrast ratio and brightness of an image can be made excellent. Further, when the color filter ink contains a pigment as a colorant, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent. Even when a relatively large amount of a colorant, a resin material, or the like is contained in the color filter ink, the change in the physical properties of the color filter ink is relatively small. In addition, when the liquid medium is composed of the above-described compound, in the color filter manufacturing method as described later, the color filter ink is more reliably spread throughout the cell. Can do.

  Among the above, when the liquid medium contains diethylene glycol monobutyl ether acetate, the viscosity of the color filter ink can be made particularly low, and the discharge stability of the color filter ink droplets is particularly excellent. Can be. In addition, since the color filter ink spreads quickly and everywhere on the substrate, the uniformity of the thickness of the colored portion to be formed can be increased, and color reproducibility and depolarization (contrast ratio) can be achieved. Can be made particularly excellent. Moreover, when a liquid medium contains diethylene glycol monobutyl ether acetate, the solubility to the liquid medium of water can be made moderate. For this reason, the liquid medium constituting the color filter ink can reliably prevent moisture absorption from the outside. Further, even when water is mixed into the color filter ink flow path or the like of the droplet discharge device, the water can be suitably dissolved and removed. As a result, the discharge stability of the color filter ink droplets from the droplet discharge head (for example, the uniformity of the droplet discharge amount) can be made particularly excellent over a longer period of time.

  In addition, among the above, when the liquid medium contains bis (2-butoxyethyl) ether and 1,3-butylene glycol diacetate, the color filter ink becomes very difficult to dry in the vicinity of the nozzle, and the ink is applied. The occurrence of flight bends in the process is more effectively suppressed. Also, in the flushing process that is performed to periodically discharge a small amount of color filter ink to prevent nozzle clogging, it is possible to prevent the color filter ink from drying near the nozzle while moving the head over a long distance. A discarded area such as a dummy pixel provided is unnecessary. In addition, since the color filter ink is difficult to dry, deterioration, aggregation, and segregation of components such as a colorant and a resin material can be more reliably prevented.

  In particular, when the liquid medium contains 1,3-butylene glycol diacetate, the solubility of water in the liquid medium can be made appropriate. For this reason, the liquid medium constituting the color filter ink surely prevents the absorption of excessive moisture from the outside, while some moisture is inside the color filter ink flow path of the droplet discharge device. Even when it is mixed, it is possible to move in the flow path while maintaining dispersion stability and fluidity by suitably dissolving water.

In particular, when the liquid medium contains at least one selected from the group consisting of diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether, and diethylene glycol diethyl ether, the viscosity of the cleaning liquid decreases and the fluidity of the cleaning liquid increases, Replacement with ink can be performed more smoothly.
In the case where the liquid medium is composed of a plurality of types of compounds, one or more selected from the group consisting of diethylene glycol mono-normal butyl ether, triethylene glycol mono-normal butyl ether and ethyl 3-ethoxypropionate is used as a secondary. When it is contained as a component (secondary liquid medium), the following effects are obtained.

  That is, these compounds (compounds as subcomponents) have a relatively high boiling point and easily dissolve the resin material as described above. And at the time of colored part formation, after most of the liquid medium used as a main component volatilizes, such a compound (subcomponent) is removed comparatively gently. On the other hand, since the subcomponent easily dissolves the above-described resin material, it tends to maintain the fluidity of the color filter ink when forming the colored portion. As a result, the convection of the color filter ink at the time of removing the subcomponent is prevented, the high fluidity of the color filter ink is maintained, and the formed colored portion has less unevenness.

In addition, the ratio of subcomponents in the liquid medium (when the compounds included as subcomponents are two or three selected from the above) may be 50 wt% or less, but 1 wt% % Or more and 40 wt% or less is preferable.
The boiling point of the liquid medium under atmospheric pressure (1 atm) is preferably 160 ° C. or higher and 300 ° C. or lower, more preferably 180 ° C. or higher and 290 ° C. or lower, and 200 ° C. or higher and 280 ° C. or lower. Further preferred. When the boiling point of the liquid medium under atmospheric pressure is a value within the above range, clogging or the like in the droplet discharge head that discharges the color filter ink can be more effectively prevented, and the productivity of the color filter is improved. Can be made particularly excellent.

  The vapor pressure at 25 ° C. of the liquid medium is preferably 0.7 mmHg or less, and more preferably 0.1 mmHg or less. When the vapor pressure of the liquid medium is within the above range, it is possible to more effectively prevent clogging and the like in the droplet discharge head that discharges the color filter ink, and the color filter productivity is particularly excellent. Can be.

The content of the liquid medium in the color filter ink is preferably 50 wt% or more and 98 wt% or less, more preferably 60 wt% or more and 95 wt% or less, and further preferably 65 wt% or more and 93 wt% or less. preferable. When the content of the liquid medium is a value within the above range, the color filter ink is excellent in the discharge property from the droplet discharge head, and the manufactured color filter has excellent durability. can do. In addition, a sufficient color density can be ensured in the manufactured color filter.
The color filter ink may contain components other than those described above. Examples of the components other than those described above constituting the color filter ink include a dispersant.

<Dispersant>
The color filter ink may contain a dispersant. Thereby, for example, the ejection stability of ink droplets can be made particularly excellent. Further, when a pigment is contained in the color filter ink, the dispersant can contribute to improving the dispersibility of the pigment particles in the color filter ink.

Examples of the dispersant include cationic, anionic, nonionic, amphoteric, silicone, and fluorine surfactants.
More specific examples of the dispersant include, for example, Dispersic 101, Dispersic 102, Dispersic 103, Dispersic P104, Dispersic P104S, Dispersic 220S, Dispersic 106, Dispersic 108, Dispersic 109, Disperse Bic 110, Dispersic 111, Dispersic 112, Dispersic 116, Dispersic 140, Dispersic 142, Dispersic 160, Dispersic 161, Dispersic 162, Dispersic 163, Dispersic 164, Dispersic 166, Dispersic 167 Dispersic 168, Dispersic 170, Dispersic 171, Dispersic 1 4, Dispersic 180, Dispersic 182, Dispersic 183, Dispersic 184, Dispersic 185, Dispersic 2000, Dispersic 2001, Dispersic 2050, Dispersic 2070, Dispersic 2095, Dispersic 2150, Dispersic LPN6919, Dispersic 9075, Dispersic 9077 (above, manufactured by BYK Chemie); EFKA 4008, EFKA 4009, EFKA 4010, EFKA 4015, EFKA 4020, EFKA 4046, EFKA 4047, EFKA 4050, EFKA 4055, EFKA 4055, EFKA 4055 , EFKA 4401, EFKA 4402, EFKA 44 3, EFKA 4406, EFKA 4408, EFKA 4300, EFKA 4330, EFKA 4340, EFKA 4015, EFKA 4800, EFKA 5010, EFKA 5065, EFKA 5066, EFKA 5070, EFKA 5070, EFKA 5070 Sol Sparse 3000, Sol Sparse 9000, Sol Sparse 13000, Sol Sparse 16000, Sol Sparse 17000, Sol Sparse 18000, Sol Sparse 20000, Sol Sparse 21000, Sol Sparse 24000, Sol Sparse 26000, Sol Sparse 27000, Sol Sparse 28000, Sol Sparse 32000, Sol Sparse 32500, Sol Sparse 33500, Sol Sparse 33500 Perth 35100, Solsperse 35200, Solsperse 36000, Solsperse 36600, Solsperse 38500, Solsperse 41000, Solsperse 41090, Solsperse 20000 (above, manufactured by Lubrizol Corporation); Manufactured by Fine Techno Co., Ltd.); Disparon 1850, Disparon 1860, Disparon 2150, Disparon 7004, Disparon DA-100, Disparon DA-234, Disparon DA-325, Disparon DA-375, Disparon DA-705, Disparon DA-725, Disparon PW -36 (above, manufactured by Enomoto Kasei Co., Ltd.); DOPA-14, Floren DOPA-15B, Floren DOPA-17, Floren DOPA-22, Floren DOPA-44, Floren TG-710, Floren D-90 (above, manufactured by Kyoei Chemical Co., Ltd.), Anti-Terra-205 (Big Chemie) Hinoact KF-1000, KF-1525, Hinoact 1300M, Hinoact T9050, Hinoact T6000, Hinoact T7000, Hinoact T8000, Hinoact T8000E (above, manufactured by Kawaken Fine Chemical Co., Ltd.), etc. Alternatively, two or more kinds can be used in combination.
In particular, the color filter ink preferably contains an acid value dispersant having a predetermined acid value and an amine value dispersant having a predetermined amine value as a dispersant. Thereby, the dispersion stability of the pigment in the color filter ink and the discharge stability of the droplets of the color filter ink can be made particularly excellent.

  Specific examples of the acid value dispersant include Dispersic P104, Dispersic P104S, Dispersic 220S, Dispersic 110, Dispersic 111, Dispersic 170, Dispersic 171, Dispersic 174, Dispersic 2095 (above, BYK Chemie) EFKA 5010, EFKA 5065, EFKA 5066, EFKA 5070, EFKA 7500, EFKA 7554 (above, manufactured by Ciba Specialty); Solsperse 3000, Solsperse 16000, Solsperse 17000, Solsperse 18000, Solsperse 36000, Solsperse 36000, (Above, manufactured by Lubrizol), Hinoact KF-1000 (Kawaken Fine Chemi) Le Co., Ltd.).

Specific examples of the amine value dispersant include Dispersic 102, Dispersic 160, Dispersic 161, Dispersic 162, Dispersic 163, Dispersic 164, Dispersic 166, Dispersic 167, Dispersic 168, Dispersic 2150, Dispersic LPN6919, Dispersic 9075, Dispersic 9077 (above, manufactured by BYK Chemie); EFKA 4015, EFKA 4020, EFKA 4046, EFKA 4047, EFKA 4050, EFKA 4055, EFKA 4060, EFKA 4060, EFKA 4060, EFKA 4060, , EFKA 4340, EFKA 4400, EFKA 4401, EFKA 4402, EFKA 440 , EFKA 4800 (above, manufactured by Ciba Specialty); Addisper PB711 (above, manufactured by Ajinomoto Fine-Techno); Anti-Terra-205 (produced by Big Chemie), KF-1525, Hinoact 1300M, Hinoact T9050, Hinoact T6000, Hinoact T7000, Hinoact T8000, Hinoact T8000E (manufactured by Kawaken Fine Chemical Co., Ltd.) and the like.
By using such a dispersant (acid value dispersant and amine value dispersant), the dispersion stability of the pigment in the ink is excellent without adversely affecting the color of the formed colored portion. can do.

  When an acid value dispersant and an amine value dispersant are used in combination, the acid value of the acid value dispersant (acid value when converted to solid content) is not particularly limited, but is 5 KOHmg / g or more and 370 KOHmg / g or less. Is more preferably 20 KOH mg / g or more and 270 KOH mg / g or less, and further preferably 30 KOH mg / g or more and 135 KOH mg / g or less. When the acid value of the acid value dispersing agent is a value within the above range, the effects as described above are more remarkably exhibited. The acid value of the dispersant can be determined by a method based on DIN EN ISO 2114, for example.

Moreover, it is preferable that the acid value dispersant does not have a predetermined amine value, that is, the amine value is zero.
When an amine value dispersant and an acid value dispersant are used in combination, the amine value of the amine value dispersant (amine value in terms of solid content) is not particularly limited, but is 5 KOHmg / g or more and 200 KOHmg / g or less. More preferably, it is 25 KOHmg / g or more and 170 KOHmg / g or less, More preferably, it is 30 KOHmg / g or more and 130 KOHmg / g or less. When the amine value of the amine value dispersant is a value within the above range, the above-described effects are more remarkably exhibited. In addition, the amine value about a dispersing agent can be calculated | required by the method based on DIN 16945, for example.

Moreover, it is preferable that the amine value dispersant does not have a predetermined acid value, that is, the acid value is zero.
When the acid value dispersant and the amine value dispersant are used in combination, the content of the acid value dispersant in the color filter ink is X _A [wt%], and the amine value dispersant in the color filter ink When the content rate is X _B [wt%], it is preferable that the relationship of 0.1 ≦ X _A / X _B ≦ 1 is satisfied, and the relationship of 0.15 ≦ X _A / X _B ≦ 0.5 is satisfied. More preferably. By satisfying such a relationship, the synergistic effect due to the combined use of the acid value dispersant and the amine value dispersant is more prominently exhibited, and the droplet discharge stability and the like are particularly excellent. it can.

The acid value of the acid value dispersant is AV [KOH mg / g], the amine value of the amine value dispersant is BV [KOH mg / g], the content of the acid value dispersant is X _A [wt%], the amine When the content of the valent dispersant is X _B [wt%], it is preferable that the relationship of 0.01 ≦ (AV × X _A ) / (BV × X _B ) ≦ 1.9 is satisfied, and 0.10 It is more preferable that the relationship of ≦ (AV × X _A ) / (BV × X _B ) ≦ 1.5 is satisfied. By satisfying such a relationship, the synergistic effect due to the combined use of the acid value dispersant and the amine value dispersant is more prominently exhibited, and the droplet discharge stability and the like are particularly excellent. it can.
The content of the dispersant in the color filter ink is preferably 0.5 wt% or more and 15 wt% or less, and more preferably 0.5 wt% or more and 8 wt% or less.

<Other ingredients>
The color filter ink may contain components other than those described above. Examples of such components include various crosslinking agents; thermal acid generators such as diazonium salts, iodonium salts, sulfonium salts, phosphonium salts, selenium salts, oxonium salts, ammonium salts, onium salts such as benzothiazolium salts; Photoacid generators such as diazonium salts, iodonium salts, sulfonium salts, phosphonium salts, selenium salts, oxonium salts, ammonium salts; various polymerization initiators; acid crosslinking agents; surfactants; sensitizers; light stabilizers; Leveling agent; antioxidant; ultraviolet absorber; adhesion improver; various polymerization accelerators; various light stabilizers; vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, N- ( 2-aminoethyl) -3-aminopropylmethyldimethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxy Adhesion promoters such as silane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane; 2,2-thiobis (4-methyl- 6-t-butylphenol), 2,6-di-t-butylphenol and other antioxidants; 2- (3-t-butyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotriazole, alkoxybenzophenone, etc. UV absorbers; polyacrylic Aggregation inhibitor such as sodium and the like.

  As the crosslinking agent, for example, polyvalent carboxylic acid anhydride, polyvalent carboxylic acid, polyfunctional epoxy monomer, polyfunctional acrylic monomer, polyfunctional vinyl ether monomer, polyfunctional oxetane monomer and the like can be used. Specific examples of polyhydric carboxylic acid anhydrides include phthalic anhydride, itaconic anhydride, succinic anhydride, citraconic anhydride, dodecenyl succinic anhydride, tricarballylic anhydride, maleic anhydride, hexahydrophthalic anhydride, dimethyltetrahydro anhydride Aliphatic or alicyclic dicarboxylic acid anhydrides such as phthalic acid, hymic anhydride, nadic anhydride; fats such as 1,2,3,4-butanetetracarboxylic dianhydride, cyclopentanetetracarboxylic dianhydride Aromatic polycarboxylic dianhydrides; aromatic polycarboxylic anhydrides such as pyromellitic anhydride, trimellitic anhydride, and benzophenone tetracarboxylic anhydride; ester groups such as ethylene glycol bistrimellitate and glycerin tristrimitate Examples of the acid anhydrides include aromatic polyvalent carboxylic acid anhydrides. Masui. Moreover, the epoxy resin hardening | curing agent which consists of a commercially available carboxylic acid anhydride can also be used suitably. Specific examples of the polycarboxylic acid include aliphatic polycarboxylic acids such as succinic acid, glutaric acid, adipic acid, butanetetracarboxylic acid, maleic acid, and itaconic acid; hexahydrophthalic acid, 1,2-cyclohexane. Aliphatic polycarboxylic acids such as dicarboxylic acid, 1,2,4-cyclohexanetricarboxylic acid and cyclopentanetetracarboxylic acid, and phthalic acid, isophthalic acid, terephthalic acid, pyromellitic acid, trimellitic acid, 1,4,5 , 8-Naphthalenetetracarboxylic acid, benzophenonetetracarboxylic acid and the like, and aromatic polyvalent carboxylic acids are preferable. Specific examples of the polyfunctional epoxy monomer include Daicel Chemical Industries, Ltd., trade name Celoxide 2021, Daicel Chemical Industries, Ltd., trade name Epolide GT401, Daicel Chemical Industries, Ltd., trade name Epolide PB3600, and Bisphenol A. , Hydrogenated bisphenol A, triglycidyl isocyanurate, and the like. Specific examples of the polyfunctional acrylic monomer include pentaerythritol ethoxytetraacrylate, pentaerythritol tetraacrylate, pentaerythritol triacrylate, ditrimethylolpropane tetraacrylate, trimethylolpropane triacrylate, trimethylolpropane ethoxytriacrylate, dipentaerythritol. Examples include hexaacrylate trimethallyl isocyanurate and triallyl isocyanurate. Specific examples of the polyfunctional vinyl ether monomer include 1,4-butanediol divinyl ether, 1,6-hexanediol divinyl ether, nonanediol divinyl ether, cyclohexanediol divinyl ether, cyclohexanedimethanol divinyl ether, and triethylene. Examples include glycol divinyl ether, trimethylolpropane trivinyl ether, pentaerythritol tetravinyl ether, and the like. Specific examples of the polyfunctional oxetane monomer include xylylene oxetane, biphenyl type oxetane, and novolak type oxetane.

  The leveling agent smoothes the surface of the color filter ink applied in the cell and lowers the colored portion by reducing the surface tension of the color filter ink. For this reason, since the color filter ink has a leveling agent, it acts synergistically with the effect of the resin material as described above, and the surface of the color filter ink in the cell can be made flatter. For this reason, the colored part to be formed becomes flatter.

  Examples of the leveling agent include acrylic leveling agents, vinyl ether leveling agents, silicone leveling agents, fluorine-silicon leveling agents, acetylene glycol leveling agents, and the like. Among these, one or a combination of two or more may be used. Can be used. Specific examples of the leveling agent include OX-880EF, OX-881, OX-883, OX-883HF, OX-70, OX-77EF, OX-60, OX-710, OX-720, OX-720EF, OX- 750HF, LAP-10, LAP-20, LAP-30, 1970, 230, LF-1970, LF-1980, LF-1982, LF-1983, LF-1984, LF-1985, LHP-95, LHP-96, UVX-35, UVX-36, UVX-39, AQ-200 (above, manufactured by Enomoto Kasei Co., Ltd.) BYK-350, BYK-352, BYK-354, BYK-355, BYK-358N / 361N, BYK-380N, BYK -811, acrylic leveling agents such as BYK-392 (above, manufactured by Big Chemie Japan), LHP 90, vinyl ether leveling agents such as LHP-91 (manufactured by Enomoto Kasei Co., Ltd.), BYK-307, BYK-300, BYK-302, BYK-306, BYK-330, BYK-331, BYK-344, BYK- Silicone leveling agents such as silicone 3700 (above, manufactured by Big Chemie Japan), KP-321, KP-324 (above, manufactured by Shin-Etsu Chemical Co., Ltd.), MegaFuck F-443, F-444, F-445, F- 446, F-470, F-471, F-472SF, F-474, F-475, F-477, F-478, F-479, F-480SF, F-482, F-483, F-484 Fluorine-silicon leveling agents such as F-486, F-487, F-489 (above, manufactured by Dainippon Ink & Chemicals, Inc.), Surfynol 04, Surfinol 82, Surfinol 2502, Surfinol 420, Surfinol 440, Surfinol 465, Surfinol 485, Surfinol 104E, Surfinol 104H, Surfinol 104A, Surfinol 104BC, Surfinol 104DPM, Surfinol 104PA, Surfinol 104PG-50, Surfinol 104S, Surfinol SE, Surfinol SE-F, Surfinol 504, Surfinol 61, Surfinol 2502, Surfinol 82, Surfinol DF110D, Surfinol DF37, Surfinol DF58, Surfinol DF75, Surfinol DF210, Surfinol CT111, Surfinol CT121, Surfino Le CT131, Surfynol CT136, Surfinol CT151, Surfinol TG, Surfinol GA, Surfinol PSA-336, Dinol 604, Envirogem AD-01, Orphin E1004, Orphin E1010, Orphin PD-001, Orphin PD-002W, Orphin PD-004, Orphin EXP. 4001, Olfine EXP. 4036, Olfine EXP. 4051F, Orphine SPC, Orphin AF-103, Olphin AF-104, Orphine AK-02, Orphin SK-14, Orphin AE-3, Orphin PD-003, Orphin PD-201, Orphin PD-202, Olphin PD-301, Acetylene glycol leveling agents such as Olphine B, Olphine P, Olphine Y, Olphine A, Olphine STG, Olphine SPC (and above, manufactured by Nissin Chemical Industry Co., Ltd.), Novec FC-4430, Novec FC-4432 (and above, Sumitomo 3M Limited); Phosphanol ML-200, Phosphanol ML-220, Phosphanol RD-510Y, Phosphanol RS-410, Phosphanol RS-610, Phosphanol RS-710, Fo Fanol RL-210, Phosphanol RL-310, Phosphanol RB-410, Phosphanol RD-720N (above, manufactured by Toho Chemical Co., Ltd.); Lanco Flow L, Lanco Flow U, SOLSPERSE 20000 (above, Lubrizol Deutschland GmbH): Aftergent 100, Aftergent 100C, Aftergent 110, Aftergent 140A, Aftergent 150, Aftergent 150CH, Aftergent AK, Aftergent 501, Aftergent 250, Aftergent 251, Aftergent Gent 222F, FTX-218, Aftergent 300, Aftergent 310, Aftergent 400SW, Aftergent 251, FTX-212M, Aftergent 250, FTX-245M, FTX-290M, FTX-207S, TX-211S, FTX-220S, FTS-230S, FTX-209F, FTX-213F, Footent 222F, FTX-233F, FTX-245F, FTX-208G, FTX-218G, FTX-230G, FTS-240G, FTX- 204D, FTX-208D, FTX-212D, FTX-216D, FTX-218D, FTX-220D, FTX-222D, FTX-720C, FTX-740C (above, manufactured by Neos Co., Ltd.); Surflon S-111n, Surflon S-113, Surflon S-121, Surflon S-131, Surflon S-132, Surflon S-141, Surflon S-145, Surflon S-381, Surflon S-383, Surflon S-393, Surflon SC-101, Surflon K H-40, Surflon SA-100 (above, manufactured by AGC Seimi Chemical Co., Ltd.); Unidyne DS-401, Unidyne DS-403, Unidyne NS-1602, Unidyne NS-1603, Unidyne NS-1605 (above, Nihon Evolution) Seisei Co., Ltd.). Among such leveling agents, it is preferable to use an acrylic leveling agent, a vinyl ether leveling agent, or an acetylene glycol leveling agent. In particular, it is preferable to use one or more selected from Surfynol DF-58, LHP-95, LHP-90, and LF1970 in combination. Thereby, the surface of the colored part to be formed is further flattened, and the obtained color filter has particularly small color unevenness and density unevenness at each part.

  The antioxidant can prevent deterioration of the color filter ink due to oxidation or the like, and can prevent deterioration of the colorant or resin material due to heat, light, or the like in the colored portion formed by the color filter ink. In particular, red colorants tend to be altered by light, heat, etc., compared to green, blue, and other colorants. However, by using an antioxidant together with a red colorant, red coloration is suitably performed. Alteration of the agent can be prevented.

  Antioxidants include various phosphorus antioxidants; various sulfur antioxidants; various hindered phenols such as IRGANOX 1010, IRGANOX 1035, IRGANOX 1076, IRGANOX 1135, IRGANOX 1520L (above, manufactured by Ciba Japan Co., Ltd.) Antioxidants: various hindered amine-based antioxidants such as TINUVIN 111FDL, TINUVIN 123, TINUVIN 144, TINUVIN 152, TINUVIN 292, TINUVIN 5100, TINUVIN 5050, TINUVIN 5060, TINUVIN 5151 (above, manufactured by Ciba Japan Co., Ltd.), etc. Various antioxidants can be used alone or in combination of two or more. Among these, it is preferable to use at least one of a hindered amine antioxidant and a hindered phenol antioxidant, more preferably a hindered phenol antioxidant, and even more preferably TINUVIN152. Such an antioxidant suitably prevents the color filter ink and the colored portion from deteriorating effectively, hardly affects the dispersibility of the pigment in the color filter ink, and in the formed colored portion. , Color, lightness, contrast ratio, and other optical characteristics are less affected.

The ultraviolet absorber has a function of preventing deterioration of other components of the colored portion by absorbing ultraviolet rays in the colored portion. As such an ultraviolet absorber, various ultraviolet absorbers such as a benzophenone ultraviolet absorber, a salicylate ultraviolet absorber, and a benzotriazole ultraviolet absorber can be used.
The thermal acid generator is a component that generates an acid by heating, and among them, a sulfonium salt and a benzothiazolium salt are particularly preferable. As more specific examples of thermal acid generators, as trade names, Sun-Aid SI-45, Same as left SI-47, Same as left SI-60, Same as left SI-60L, Same as left SI-80, Same as left SI-80L, Same as left SI- 100, same left SI-100L, same left SI-145, same left SI-150, same left SI-160, same left SI-110L, same left SI-180L (above, Sanshin Chemical Co., Ltd., product name), CI-2921, CI -2920, CI-2946, CI-3128, CI-2624, CI-2639, CI-2064 (Nippon Soda Co., Ltd. product, trade name), CP-66, CP-77 (Asahi Denka Kogyo Co., Ltd. products) , Product name), FC-520 (product of 3M company, product name) and the like.

  The photoacid generator is a component that generates an acid by light. As more specific examples, as trade names, Cyracure UVI-6970, Cyracure UVI-6974, Cyracure UVI-6990, Cyracure UVI-950 (above, US Union Carbide, trade name), Irgacure 261 (Ciba Specialty Chemicals, trade name), SP-150, SP-151, SP-170, Optmer SP-171 (above, manufactured by Asahi Denka Kogyo Co., Ltd.) , Trade name), CG-24-61 (trade name, manufactured by Ciba Specialty Chemicals), DAICAT II (trade name, manufactured by Daicel Chemical Industries, Ltd.), UVAC1591 (trade name, manufactured by Daicel UCB Co., Ltd.) CI-2064, CI-2639, CI-2624, CI-2481, CI-2 34, CI-2855, CI-2823, CI-2758 (Nippon Soda Co., Ltd. product, trade name), PI-2074 (Rhone-Poulenc, trade name, pentafluorophenylborate toluylcumyl iodonium salt), FFC509 ( 3M company product, trade name), BBI-102, BBI-101, BBI-103, MPI-103, TPS-103, MDS-103, DTS-103, NAT-103, NDS-103 (Midori Chemical Co., Ltd., product) Name), CD-1012 (trade name, manufactured by Sartomer, USA) and the like.

  The color filter ink may contain polyalkylene glycol. The polyalkylene glycol can maintain the fluidity of the color filter ink by reducing the thixotropic property of the color filter ink during the formation of the colored portion, thereby contributing to the flattening of the colored portion. can do. Further, the polyalkylene glycol is removed by heating at the time of forming the colored portion.

  Examples of the glycols constituting the polyalkylene glycol include propylene glycol such as ethylene glycol and 1,2-propylene glycol, various butylene glycols, various pentylene glycols, various hexylene glycols, and the like. Alternatively, two or more types can be used in combination. Among these, it is preferable to use an oligomer of ethylene glycol or an oligomer of 1,2-propylene glycol.

  The polyalkylene glycol preferably has a hydroxyl group. For example, it is preferable that the terminal hydroxyl group is not substituted. As described above, since the polyalkylene glycol has a hydroxyl group, the thixotropic property of the ink can be further reduced. In addition, the affinity for the color filter ink to a substrate (particularly a glass substrate), which will be described later, becomes excellent, and the color filter ink can suitably spread in the cells.

The degree of polymerization of the polyalkylene glycol is preferably 3 or more and 40 or less, and more preferably 3 or more and 20 or less. Thereby, the thixotropic property of the color filter ink can be sufficiently reduced.
The weight average molecular weight of the polyalkylene glycol is preferably 150 or more and 2000 or less, more preferably 180 or more and 1000 or less, and further preferably 180 or more and 500 or less. Thereby, the thixotropic property of the color filter ink can be sufficiently reduced.

  The viscosity at 25 ° C. of the color filter ink (viscosity measured using a vibration viscometer) is not particularly limited, but is preferably 4 mPa · s or more and 12 mPa · s or less, preferably 5 mPa · s or more and 11 mPa · s. The following is more preferable. When the viscosity of the color filter ink is within the above range, the droplet ejection stability by the ink jet method can be made particularly excellent, and the color filter production efficiency (colored portion formation efficiency) is particularly high. In addition to being excellent, it is possible to effectively prevent unintentional variations in the thickness of the colored portion. The viscosity of the color filter ink can be measured using, for example, a vibration viscometer, and can be performed in particular in accordance with JIS Z8809.

<Ink set>
The color filter ink as described above is used for manufacturing a color filter by an ink jet method. Since the color filter usually corresponds to full color display, it has a plurality of colored portions (usually, three RGB colors corresponding to the three primary colors of light). For forming the colored portions of the plurality of colors, a plurality of types of color filter inks (for example, a color filter ink (R ink) for forming a red colored portion, a green colored portion forming color) corresponding to each color are formed. Color filter ink (G ink) and blue color portion forming color filter ink (B ink)) are used. That is, an ink set (color filter ink set) including a plurality of colors of color filter inks is used for manufacturing a color filter. In the production of a color filter, the color filter ink as described above is preferably used for forming at least one colored portion, and more preferably used for forming all colored portions. As a result, it is possible to suppress variations in droplet discharge stability between the colors at a higher level, and it is possible to manufacture a more reliable color filter.

<Droplet ejection device>
Next, an example of a droplet discharge device to which the cleaning liquid (cleaning liquid set) of the present invention is applied will be described.
The ink for color filter by the ink jet method is discharged using, for example, a droplet discharge device as shown in FIGS. 1 is a perspective view showing a droplet discharge device used for manufacturing a color filter, FIG. 2 is a view of droplet discharge means in the droplet discharge device shown in FIG. 1 observed from the stage side, and FIG. FIG. 4 is a view showing a bottom surface of a droplet discharge head in the droplet discharge device shown in FIG. 4, FIG. 4 is a view showing a droplet discharge head in the droplet discharge device shown in FIG. 1, and FIG. ) Is a cross-sectional view. In addition, the cleaning liquid as described above is flowed through the color filter ink flow path in the droplet discharge apparatus 100 to clean the droplet discharge apparatus 100 and remove deposits on the color filter ink flow path. To do.

  As shown in FIG. 1, the droplet discharge device 100 used in this process is supplied with a color filter ink 2 from a tank 101 holding a color filter ink 2, a tube 110, and the tube 110. A discharge scanning unit 102. The ejection scanning unit 102 includes a droplet ejection unit 103 in which a plurality of droplet ejection heads (inkjet heads) 114 are mounted on a carriage 105, and a first position control device 104 (movement) that controls the position of the droplet ejection unit 103. Means), a stage 106 for holding the substrate 11 on which the partition wall 13 is formed in the above process (hereinafter also simply referred to as "substrate 11"), and a second position control device 108 (moving means) for controlling the position of the stage 106. ) And a control means 112. The tank 101 and a plurality of droplet discharge heads 114 in the droplet discharge means 103 are connected by a tube 110, and the color filter ink 2 is compressed by compressed air from the tank 101 to each of the plurality of droplet discharge heads 114. Supplied.

  The first position control device 104 moves the droplet discharge means 103 along the X-axis direction and the Z-axis direction orthogonal to the X-axis direction in response to a signal from the control means 112. Further, the first position control device 104 also has a function of rotating the droplet discharge means 103 around an axis parallel to the Z axis. In the present embodiment, the Z-axis direction is a direction parallel to the vertical direction (that is, the direction of gravitational acceleration). The second position controller 108 moves the stage 106 along the Y-axis direction orthogonal to both the X-axis direction and the Z-axis direction in response to a signal from the control unit 112. Further, the second position control device 108 also has a function of rotating the stage 106 around an axis parallel to the Z axis.

The stage 106 has a plane parallel to both the X-axis direction and the Y-axis direction. Further, the stage 106 is configured so that the substrate 11 having the cells 14 to which the color filter ink 2 to be applied as shown in FIG. 6 (7d) described later can be fixed or held on the plane.
As described above, the droplet discharge means 103 is moved in the X-axis direction by the first position control device 104. On the other hand, the stage 106 is moved in the Y-axis direction by the second position control device 108. That is, the first position controller 104 and the second position controller 108 change the relative position of the droplet discharge head 114 with respect to the stage 106 (the substrate 11 held on the stage 106 and the droplet discharge means 103 are relative to each other). To go to).
The control unit 112 is configured to receive ejection data representing a relative position at which the color filter ink 2 is to be ejected from an external information processing apparatus.

  As shown in FIG. 2, the droplet discharge means 103 includes a plurality of droplet discharge heads 114 each having substantially the same structure, and a carriage 105 that holds these droplet discharge heads 114. In the present embodiment, the number of droplet discharge heads 114 held by the droplet discharge means 103 is eight. Each droplet discharge head 114 has a bottom surface provided with a plurality of nozzles 118 described later. The shape of the bottom surface of each droplet discharge head 114 is a polygon having two long sides and two short sides. The bottom surface of the droplet discharge head 114 held by the droplet discharge means 103 faces the stage 106 side, and the long side direction and the short side direction of the droplet discharge head 114 are respectively an X-axis direction and a Y-axis direction. Parallel to the direction.

  As shown in FIG. 3, the droplet discharge head 114 has a plurality of nozzles 118 arranged in the X-axis direction. The plurality of nozzles 118 are arranged such that the nozzle pitch HXP in the X-axis direction in the droplet discharge head 114 has a predetermined value. Although the specific value of nozzle pitch HXP is not specifically limited, For example, it is 50 micrometers or more and 90 micrometers or less. Here, the “nozzle pitch HXP in the X-axis direction in the droplet discharge head 114” is a plurality of images obtained by projecting all the nozzles 118 in the droplet discharge head 114 onto the X-axis along the Y-axis direction. This corresponds to the pitch between nozzle images.

In the present embodiment, the plurality of nozzles 118 in the droplet discharge head 114 form a nozzle row 116A and a nozzle row 116B that both extend in the X-axis direction. The nozzle row 116A and the nozzle row 116B are arranged in parallel with a space therebetween. In this embodiment, 90 nozzles 118 are arranged in a line in the X-axis direction at a constant interval LNP in each of the nozzle array 116A and the nozzle array 116B. Although the specific value of LNP is not specifically limited, it can be 100 μm or more and 180 μm or less.
The position of the nozzle row 116B is shifted from the position of the nozzle row 116A by a half length of the nozzle pitch LNP in the positive direction in the X-axis direction (right direction in FIG. 3). Therefore, the nozzle pitch HXP in the X-axis direction of the droplet discharge head 114 is half the nozzle pitch LNP of the nozzle row 116A (or nozzle row 116B).

  Accordingly, the nozzle line density in the X-axis direction of the droplet discharge head 114 is twice the nozzle line density of the nozzle row 116A (or nozzle row 116B). In the present specification, “nozzle line density in the X-axis direction” means the number per unit length of a plurality of nozzle images obtained by projecting a plurality of nozzles on the X-axis along the Y-axis direction. It corresponds to. Of course, the number of nozzle rows included in the droplet discharge head 114 is not limited to two. The droplet discharge head 114 may include M nozzle rows. Here, M is a natural number of 1 or more. In this case, in each of the M nozzle rows, the plurality of nozzles 118 are arranged at a pitch that is M times the nozzle pitch HXP. Further, when M is a natural number of 2 or more, the other (M−1) nozzle rows are only i times as long as the nozzle pitch HXP with respect to one of the M nozzle rows. There is no overlap in the X-axis direction. Here, i is a natural number from 1 to (M−1).

  In the present embodiment, since each of the nozzle row 116 </ b> A and the nozzle row 116 </ b> B includes 90 nozzles 118, one droplet discharge head 114 has 180 nozzles 118. However, 5 nozzles at both ends of the nozzle row 116A are set as “pause nozzles”. Similarly, 5 nozzles at both ends of the nozzle row 116B are also set as “pause nozzles”. The color filter ink 2 is not ejected from these 20 “rest nozzles”. Therefore, of the 180 nozzles 118 in the droplet discharge head 114, 160 nozzles 118 function as nozzles that discharge the color filter ink 2.

  As shown in FIG. 2, in the droplet discharge means 103, a plurality of the droplet discharge heads 114 are arranged in two rows along the X-axis direction. The droplet discharge heads 114 in one row and the droplet discharge heads 114 in the other row are arranged so as to partially overlap when viewed from the Y-axis direction in consideration of the rest nozzles. Thereby, in the droplet discharge means 103, the nozzle 118 that discharges the color filter ink 2 is continuous in the X-axis direction at the nozzle pitch HXP over the length of the dimension of the substrate 11 in the X-axis direction. It is configured.

In the droplet discharge means 103 of this embodiment, the droplet discharge head 114 is disposed so as to cover the entire length of the substrate 11 in the X-axis direction. A part of the length of the substrate 11 corresponding to the dimension in the X-axis direction may be covered.
As shown in the figure, each droplet discharge head 114 is an inkjet head. More specifically, each droplet discharge head 114 includes a vibration plate 126 and a nozzle plate 128. Between the diaphragm 126 and the nozzle plate 128, a liquid pool 129 that is always filled with the color filter ink 2 supplied from the tank 101 through the hole 131 is located.

  In addition, a plurality of partition walls 122 are located between the diaphragm 126 and the nozzle plate 128. A portion surrounded by the diaphragm 126, the nozzle plate 128, and the pair of partition walls 122 is a cavity 120. Since the cavities 120 are provided corresponding to the nozzles 118, the number of the cavities 120 and the number of the nozzles 118 are the same. The color filter ink 2 is supplied from the liquid pool 129 to the cavity 120 via the supply port 130 positioned between the pair of partition walls 122.

  Further, the vicinity of the nozzle 118 of the nozzle plate 128 is covered with a silica film having an alkyl fluoride group in the vicinity of the surface. As a result, the nozzle 118 has excellent liquid repellency and can repel the ink 2 particularly preferably. In particular, since the nozzle plate 128 has such a silica film, solid adhesion in the vicinity of the nozzle 118 can be prevented. For this reason, it is possible to reliably prevent the occurrence of flight bends during droplet ejection, fluctuations in the amount of droplets, and clogging of the nozzle 118, and the ejection of droplets of the color filter ink 2 over an extremely long period of time. The property can be made particularly excellent.

  On the diaphragm 126, the vibrator 124 is positioned corresponding to each cavity 120. The vibrator 124 includes a piezoelectric element 124C and a pair of electrodes 124A and 124B sandwiching the piezoelectric element 124C. By applying a driving voltage between the pair of electrodes 124A and 124B, the color filter ink 2 is ejected from the corresponding nozzle 118. The shape of the nozzle 118 is adjusted so that the color filter ink 2 is ejected from the nozzle 118 in the Z-axis direction.

  The control means 112 (see FIG. 1) may be configured to give a signal to each of the plurality of vibrators 124 independently of each other. That is, the volume of the color filter ink 2 ejected from the nozzle 118 may be controlled for each nozzle 118 in accordance with a signal from the control unit 112. The control unit 112 can also set the nozzle 118 that performs the ejection operation during the application scan and the nozzle 118 that does not perform the ejection operation.

In this specification, a portion including one nozzle 118, a cavity 120 corresponding to the nozzle 118, and a vibrator 124 corresponding to the cavity 120 may be referred to as “ejection unit 127”. According to this notation, one droplet discharge head 114 has the same number of discharge units 127 as the number of nozzles 118.
In the configuration shown in the figure, the droplet discharge device 100 has only one tank 101 for holding the color filter ink 2, a tube 110, and the like for one color, but the color filter 1 has a plurality of these members. It may have a plurality of colors corresponding to the colored portion 12. In manufacturing the color filter 1, a plurality of droplet discharge devices 100 corresponding to a plurality of color filter inks 2 may be used.
In the present invention, the droplet discharge head 114 may use an electrostatic actuator as a driving element instead of a piezoelectric element. In addition, the droplet discharge head 114 may be configured to use an electrothermal conversion element as a drive element and discharge the color filter ink using thermal expansion of a material by the electrothermal conversion element.

  Further, the droplet discharge device 100 has an ink storage tank 132 and a cleaning liquid storage tank 133 as shown in FIG. The ink storage tank 132 stores the color filter ink 2, and the cleaning liquid storage tank 133 stores the cleaning liquid 4. At the time of droplet discharge, the color filter ink 2 is transported to the tank 101 by the transport path 134 and used for manufacturing the color filter 1. Further, at the time of cleaning, the cleaning liquid 4 is transported to the tank 101 by the transport path 134 and is stored after being replaced with the color filter ink 2. The stored cleaning liquid 4 is stored along the flow path of the color filter ink 2. By flowing, the flow path of the color filter ink 2 in the tank 101, the tube 110, the droplet discharge means 103 and the like is cleaned. By having the ink storage tank 132 and the cleaning liquid storage tank 133 in this way, the ink flow path can be cleaned more easily and reliably. In addition, the color filter ink 2 can be efficiently flowed after cleaning, and the cleaning liquid 4 can be quickly replaced with the color filter ink 2. As a result, the droplet discharge device 100 can be operated efficiently, and the productivity of the color filter 1 can be improved.

<Dropping device cleaning method>
The ink flow path can be cleaned using the cleaning liquid (cleaning liquid set) of the present invention for the above-described droplet discharge device.
The cleaning may be performed at any time. For example, when the droplet discharge is stopped, the color filter ink 2 is replaced or replenished, before or after the droplet discharge device 100 is operated, when the droplet discharge head is replaced, the ink is This can be done at the time of replacement of parts in the flow path. By periodically performing cleaning with the cleaning liquid 4 during such a period, it is possible to reliably prevent adhesion of dirt in the ink flow path of the droplet discharge device 100 and clogging of the nozzle 118. In addition, the life of each component of the droplet discharge device can be made extremely long. For example, replacement due to deterioration of the droplet discharge head 114 can be reduced.

  Examples of the flow path of the color filter ink 2 include a tank 101, a tube 110, a droplet discharge head 114, and the like. In particular, the nozzle (ejection port) 118 in the droplet ejection head 114 tends to cause solids to deposit and adhere, and as a result, clogging and droplet bending are likely to occur frequently. However, these problems can be reliably solved by performing the cleaning using the cleaning liquid 4.

  Further, any method may be used for cleaning the droplet discharge device 100 with the cleaning liquid 4. For example, as shown in FIG. 1, the cleaning liquid 4 is caused to flow through the flow path along the direction in which the color filter ink 2 normally flows. It may be a thing. Further, for example, the cleaning liquid 4 may be caused to flow in the flow path along the direction opposite to the direction in which the color filter ink 2 normally flows. Further, for example, the cleaning liquid 4 may be applied to the cleaning site of the droplet discharge device 100 or may be sprayed.

  In this manner, the droplet discharge device 100 is cleaned by bringing the cleaning liquid 4 into contact with the flow channel of the color filter ink 2 in the droplet discharge device 100, and the adhering matter to the flow channel of the color filter ink 2 is ensured. Can be removed. In addition, it is possible to reliably prevent re-adhesion of the solid content constituting the color filter ink to the flow path. For this reason, by performing the cleaning using the cleaning liquid according to the present invention, the discharge of the color filter ink droplets by the droplet discharge device has a stable discharge amount and less clogging, The discharge amount, flight accuracy, etc. will be stable over a long period of time. Further, the color filter 1 manufactured using such a droplet discharge device has a small variation in characteristics among individuals.

"Color filter"
Next, an example of a color filter manufactured using the color filter ink (ink set) as described above (a color filter manufactured by a color filter manufacturing system using the color filter ink and a cleaning liquid) will be described.

FIG. 5 is a cross-sectional view showing a preferred embodiment of the color filter.
As shown in FIG. 5, the color filter 1 includes a substrate 11 and a colored portion 12 formed using the color filter ink described above. As the coloring portion 12, a first coloring portion 12A, a second coloring portion 12B, and a third coloring portion 12C having different colors are provided. A partition wall 13 is provided between the adjacent colored portions 12.

<Board>
The substrate 11 is a plate-like member having optical transparency, and has a function of holding the coloring portion 12 and the partition wall 13.
The substrate 11 is preferably made of a substantially transparent material. Thereby, a clearer image can be formed by the light transmitted through the color filter 1.

  The substrate 11 is preferably excellent in heat resistance and mechanical strength. Thereby, for example, deformation due to heat applied during the manufacture of the color filter 1 can be reliably prevented. Examples of the constituent material of the substrate 11 that satisfies such conditions include glass, silicon, polycarbonate, polyester, aromatic polyamide, polyamideimide, polyimide, norbornene-based ring-opening polymer, and hydrogenated products thereof.

<Coloring part>
The colored portion 12 is formed using the color filter ink (color filter ink set) as described above.
Since the coloring portion 12 is formed using the color filter ink (color filter ink set) as described above, variation in characteristics among the pixels is small, and unintentional color mixing (plural kinds of colors) Mixing of color filter ink) is reliably prevented. For this reason, the color filter 1 has high reliability in which the occurrence of uneven color and uneven density is suppressed. Moreover, the color filter 1 is excellent in the coloring property of the coloring part 12, and excellent in contrast.

Each coloring portion 12 is provided in a cell 14 which is a region surrounded by a partition wall 13 which will be described later.
The first colored portion 12A, the second colored portion 12B, and the third colored portion 12C have different colors. For example, the first colored portion 12A can be a red filter region (R), the second colored portion 12B can be a green filter region (G), and the third colored portion 12C can be a blue filter region (B).

  One set of colored portions 12A, 12B, and 12C of different colors constitutes one pixel. In the color filter 1, a predetermined number of colored portions 12 are arranged in the horizontal direction and the vertical direction. For example, when the color filter 1 is a high-definition color filter, 1366 × 768 pixels are arranged, and when the color filter 1 is a full high-definition color filter, 1920 × 1080 pixels are arranged. In the case of a super high vision color filter, 7680 × 4320 pixels are arranged. Note that the color filter 1 may be provided with a spare pixel outside the effective area, for example.

<Partition wall>
A partition wall (bank) 13 is provided between the adjacent colored portions 12. Thereby, it can prevent reliably that the adjacent coloring parts 12 will mix colors, As a result, a clear image can be displayed reliably.
The partition wall 13 may be made of a transparent material, but is preferably made of a light-shielding material. Thereby, an image with excellent contrast can be displayed. The color of the partition wall (light shielding part) 13 is not particularly limited, but is preferably black. Thereby, the contrast of the displayed image can be made particularly excellent.

  The height of the partition wall 13 is not particularly limited, but is preferably substantially the same as the film thickness of the colored portion 12. Thereby, the color mixture between the adjacent coloring parts 12 can be prevented reliably. The specific thickness of the partition wall 13 is preferably 0.1 μm or more and 10 μm or less, and more preferably 0.5 μm or more and 3.5 μm or less. As a result, color mixing between the adjacent colored portions 12 can be surely prevented, and the viewing angle characteristics of the image display device and electronic apparatus including the color filter 1 can be improved.

  The partition wall 13 may be made of any material, but for example, is preferably made mainly of a resin material. Thereby, the partition wall 13 can be easily formed as having a desired shape by a method as described later. Moreover, when the partition 13 has a function as a light-shielding part, it may include a light-absorbing material such as carbon black as a constituent material.

《Color filter manufacturing method》
Next, an example of a method for manufacturing the color filter 1 as described above will be described.
FIG. 6 is a cross-sectional view illustrating a method for manufacturing a color filter.
As shown in FIG. 6, in this embodiment, a substrate preparation step (7a) for preparing the substrate 11, a partition formation step (7b, 7c) for forming the partition 13 on the substrate 11, and a color filter by an inkjet method. An ink application step (7d) for applying the ink 2 to the region surrounded by the partition wall 13, and removing the liquid medium from the color filter ink 2 to cure the curable resin, thereby forming the solid colored portion 12. A colored portion forming step (7e).

<Board preparation process>
First, the substrate 11 is prepared (7a). The substrate 11 prepared in this step is preferably subjected to a cleaning process. Further, the substrate 11 prepared in this step is subjected to appropriate pretreatment such as chemical treatment with a silane coupling agent or the like, plasma treatment, ion plating, sputtering, gas phase reaction method, vacuum deposition, and the like. Also good.

<Partition forming process>
Next, the radiation-sensitive composition for forming the partition wall of the substrate 11 is applied to almost the entire one surface of the substrate 11 to form the coating film 3 (7b). In addition, after giving a radiation sensitive composition on the board | substrate 11, you may perform a prebaking process as needed. The pre-bake treatment can be performed, for example, under the conditions of heating temperature: 50 ° C. or higher and 150 ° C. or lower, heating time: 30 seconds or longer and 600 seconds or shorter.

Then, the partition 13 is formed by performing a post-exposure baking process (PEB) by irradiating with a radiation through a photomask, and further performing a developing process using an alkali developer (7c). PEB can be performed, for example, under the conditions of heating temperature: 50 ° C. to 150 ° C., heating time: 30 seconds to 600 seconds, and radiation irradiation intensity: 1 mJ / cm ^{2 to} 500 mJ / cm ² . The development processing can be performed by, for example, a liquid piling method, a dipping method, a vibration dipping method, or the like, and the development processing time can be, for example, not less than 10 seconds and not more than 300 seconds. Further, after the development process, a post-bake process may be performed as necessary. The post-bake treatment can be performed, for example, under the conditions of heating temperature: 150 ° C. or higher and 280 ° C. or lower and heating time: 3 minutes or longer and 120 minutes or shorter.

  Moreover, you may perform a liquid-repellent process with respect to the coating film 3 before image development processing. For example, before the development treatment, a fluororesin may be applied to the coating film 3 by a stamp method or the like, and fluorine is doped on the surface of the coating film 3 (radiation sensitive composition) by plasma polymerization treatment. Also good. By performing such a process, only the bank surface (upper surface in the drawing, a portion excluding the inner wall surface) is made liquid repellent, and contributes to the flattening of the surface of the colored portion 12 formed in a later step. Further, a fluororesin having a light specific gravity may be added to the radiation-sensitive composition so as to be oriented only on the surface.

<Ink application process>
Next, the color filter ink 2 is applied to the cell 14 surrounded by the partition wall 13 by an inkjet method (7d).
This step is performed using a plurality of types of color filter inks 2 corresponding to the plurality of colored portions 12 to be formed. At this time, since the partition wall 13 is provided, it is reliably prevented that two or more kinds of color filter inks 2 are mixed.

  The color filter ink 2 is applied to the color filter corresponding to the colored portions 12 of the color filter 1 using the droplet discharge device 100 shown in FIGS. 1 to 4 as described above. The ink 2 is applied by being applied in the cell 14. By using the droplet discharge device and the cleaning liquid as described above, the discharge property of the color filter ink 2 becomes excellent, and a desired amount of the color filter ink 2 can be efficiently applied in the cell 14. it can.

<Colored part forming step (curing step)>
Next, the liquid medium is removed from the color filter ink 2 in the cell 14, and the curable resin is cured to form a solid colored portion 12 (7e). Thereby, the color filter 1 is obtained.
This step is usually performed by heating. By performing this step by heating, the adhesion of the colored portion 12 to be formed to the substrate 11 can be made particularly excellent. Further, it is possible to reliably prevent the liquid medium of the color filter ink from remaining in the colored portion 12 to be formed. As a result, the durability and reliability of the color filter 1 can be made particularly excellent. Also, the productivity of the color filter 1 is improved.

  The heating temperature in this step (the temperature of the heated substrate 11) is not particularly limited, but is preferably 100 ° C. or higher and 280 ° C. or lower, and more preferably 110 ° C. or higher and 250 ° C. or lower. Thereby, the curing reaction of the resin material can be efficiently advanced while preventing the unintentional deterioration / decomposition of the constituent material of the colored portion 12, and the liquid medium can be suitably removed from the color filter ink 2.

The heating time in this step is not particularly limited, but is preferably 30 minutes or longer and 190 minutes or shorter, and more preferably 40 minutes or longer and 130 minutes or shorter.
In this step, a plurality of heat treatments with different temperatures may be performed. Specifically, in this step, a first heat treatment that heats the substrate 11 at a relatively low temperature and a second heat treatment that heats the substrate 11 at a temperature higher than the first heat treatment are performed. May be.

As a result, unintentional deterioration / decomposition of the constituent material of the colored portion 12 is prevented, the productivity of the color filter 1 is improved, and the liquid medium remains in the formed colored portion 12. Can be prevented.
Further, in this step, by performing a first heat treatment for heating the substrate 11 at a relatively low temperature and a second heat treatment for heating the substrate 11 at a temperature higher than the first heat treatment, The flatness of the surface of the coloring part 12 can be made higher.

  In such a case, by heating the substrate 11 at a relatively low temperature in the first heat treatment, the liquid medium is gently removed while preventing the convection of the color filter ink 2, and the color filter ink 2. The fluidity can be lost or reduced with the surface of the substrate flat. Moreover, the unintentional curing reaction of the resin material can be prevented by heating at a relatively low temperature.

In the second heat treatment, the liquid medium that could not be removed by the first heat treatment can be completely removed. In this step, when the color filter ink 2 is cured by reacting the resin material, the color filter ink 2 fixed in a flat state in the first heat treatment is efficiently cured in the shape. Can be made.
As described above, when the first heat treatment and the second heat treatment are performed in this step, the treatment temperature in the first heat treatment (the temperature of the heated substrate 11) is not particularly limited, but is 30 ° C. The temperature is preferably 100 ° C. or lower and more preferably 40 ° C. or higher and 80 ° C. or lower. Accordingly, the liquid medium can be suitably removed from the color filter ink 2 while reliably preventing convection of the color filter ink 2.

The time for the first heat treatment is not particularly limited, but is preferably 3 minutes or longer and 50 minutes or shorter, and more preferably 5 minutes or longer and 40 minutes or shorter.
The treatment temperature in the second heat treatment (the temperature of the heated substrate 11) is not particularly limited, but is preferably 120 ° C. or higher and 280 ° C. or lower, and more preferably 150 ° C. or higher and 250 ° C. or lower. preferable. Thereby, the liquid medium which could not be removed by the first heat treatment can be completely removed. In this step, when the color filter ink 2 is cured by reacting a resin material (curable resin material), the color filter ink 2 fixed in a flat state in the first heat treatment is used. It can be efficiently cured in that shape.
The time for the second heat treatment is not particularly limited, but is preferably 25 minutes or more and 150 minutes or less, and more preferably 30 minutes or more and 100 minutes or less.
Further, in this step, for example, treatment such as irradiation with active energy rays or placing the substrate 11 to which the color filter ink 2 is applied in a reduced pressure environment may be performed.

  By irradiating active energy rays, the curing reaction of the curable resin can proceed efficiently, or the curing reaction of the curable resin can proceed reliably even when the heating temperature is relatively low. Thus, it is possible to obtain an effect that the occurrence of adverse effects on the substrate 11 and the like can be prevented more reliably. As the active energy ray, light beams having various wavelengths, for example, ultraviolet rays, X-rays, g-rays, i-rays, excimer lasers, and the like can be used.

  Further, by placing the substrate 11 provided with the color filter ink 2 in a reduced pressure environment (depressurization treatment), the liquid medium can be removed more efficiently, or coloring in the pixels (cells). Even when the shape of the portion can be reliably made preferable or the heating temperature is relatively low, the liquid medium can be reliably removed, and the substrate 11 can be colored. It is possible to obtain effects such as more reliably preventing the occurrence of adverse effects on the portion 12 and the like. Moreover, a colored part can be more efficiently formed by using heat processing and pressure reduction processing together.

<Image display device>
Next, a preferred embodiment of a liquid crystal display device that is an image display device (electro-optical device) having the color filter 1 will be described.
FIG. 7 is a cross-sectional view showing a preferred embodiment of the liquid crystal display device. As shown in the figure, the liquid crystal display device 60 includes a color filter 1, a substrate (opposite substrate) 66 disposed on the side of the color filter 1 on which the colored portion 12 is provided, a color filter 1 and a substrate 66. And a polarizing plate 67 provided on the surface side opposite to the surface of the substrate 11 of the color filter 1 opposite to the liquid crystal layer 62 (lower side in FIG. 7). And a polarizing plate 68 provided on the surface side opposite to the surface facing the liquid crystal layer 62 of the substrate 66 (upper side in FIG. 7). A common electrode 61 is provided on the surface of the color filter 1 on which the colored portion 12 and the partition wall 13 are provided (the surface opposite to the surface of the colored portion 12 and the partition wall 13 facing the substrate 11). On the surface of the (opposite substrate) 66 facing the liquid crystal layer 62 and the color filter 1, pixel electrodes 65 are arranged in a matrix at positions corresponding to the colored portions 12 of the color filter 1. Further, an alignment film 64 is provided between the common electrode 61 and the liquid crystal layer 62, and an alignment film 63 is provided between the substrate 66 (pixel electrode 65) and the liquid crystal layer 62.

The substrate 66 is a substrate having optical transparency with respect to visible light, and is, for example, a glass substrate.
The common electrode 61 and the pixel electrode 65 are made of a material having optical transparency to visible light, and are made of, for example, ITO.
Although omitted in the drawing, a plurality of switching elements (for example, TFTs: thin film transistors) are provided so as to correspond to the respective pixel electrodes 65. For each pixel electrode 65 corresponding to each coloring portion 12, by controlling the voltage application state between the common electrode 61, in the region corresponding to each coloring portion 12 (each pixel electrode 65), Light transmittance can be controlled.

In the liquid crystal display device 60, light emitted from a backlight (not shown) enters from the polarizing plate 68 side (upper side in FIG. 7). And the light which permeate | transmitted the liquid crystal layer 62 and entered into each coloring part 12 (12A, 12B, 12C) of the color filter 1 is polarized as light of the color corresponding to each coloring part 12 (12A, 12B, 12C). The light is emitted from the plate 67 (lower side in FIG. 7).
As described above, since the colored portion 12 is formed using the droplet discharge device and the color filter ink 2 to which the above-described cleaning liquid is applied, variation in characteristics between colors and between pixels. Is suppressed. As a result, the liquid crystal display device 60 can stably display an image in which color unevenness, density unevenness, and the like at each part are suppressed.

"Electronics"
An image display device (electro-optical device) 1000 such as a liquid crystal display device having the color filter 1 as described above can be used for display portions of various electronic devices.
FIG. 8 is a perspective view illustrating a configuration of a mobile (or notebook) personal computer as an electronic apparatus including an image display device having a color filter.

In this figure, a personal computer 1100 includes a main body 1104 having a keyboard 1102 and a display unit 1106. The display unit 1106 is supported by the main body 1104 through a hinge structure so as to be rotatable. Yes.
In the personal computer 1100, the display unit 1106 includes an image display device 1000.

FIG. 9 is a perspective view illustrating a configuration of a mobile phone (including PHS) as an electronic apparatus including an image display device having a color filter.
In this figure, a cellular phone 1200 includes a plurality of operation buttons 1202, an earpiece 1204 and a mouthpiece 1206, and an image display device 1000 in a display unit.

FIG. 10 is a perspective view illustrating a configuration of a digital still camera as an electronic apparatus including an image display device having a color filter. In this figure, the connection with an external device is also shown in a simplified manner.
Here, an ordinary camera sensitizes a silver salt photographic film with a light image of a subject, whereas a digital still camera 1300 photoelectrically converts a light image of a subject with an image sensor such as a CCD (Charge Coupled Device). An imaging signal (image signal) is generated.

On the back of a case (body) 1302 in the digital still camera 1300, an image display device 1000 is provided in the display unit, and is configured to display based on an imaging signal from the CCD, and a finder that displays an object as an electronic image. Function as.
A circuit board 1308 is installed inside the case. The circuit board 1308 is provided with a memory that can store (store) an imaging signal.

A light receiving unit 1304 including an optical lens (imaging optical system), a CCD, and the like is provided on the front side of the case 1302 (on the back side in the illustrated configuration).
When the photographer confirms the subject image displayed on the display unit and presses the shutter button 1306, the CCD image pickup signal at that time is transferred and stored in the memory of the circuit board 1308.

  In the digital still camera 1300, a video signal output terminal 1312 and an input / output terminal 1314 for data communication are provided on the side surface of the case 1302. As shown in the figure, a television monitor 1430 is connected to the video signal output terminal 1312 and a personal computer 1440 is connected to the input / output terminal 1314 for data communication as necessary. Further, the imaging signal stored in the memory of the circuit board 1308 is output to the television monitor 1430 or the personal computer 1440 by a predetermined operation.

  In addition to the above-described personal computer (mobile personal computer), mobile phone, and digital still camera, the above-described image display device includes, for example, a television (for example, a liquid crystal television), a video camera, a viewfinder type, a monitor. Direct-view video tape recorder, laptop personal computer, car navigation system, pager, electronic notebook (including communication function), electronic dictionary, calculator, electronic game device, word processor, workstation, video phone, security TV monitor , Electronic binoculars, POS terminals, devices equipped with touch panels (for example, cash dispensers of financial institutions, automatic ticket vending machines), medical devices (for example, electronic thermometers, blood pressure monitors, blood glucose meters, electrocardiographic display devices, ultrasonic diagnostic devices, endoscopy) Mirror display device , A fish finder, various measurement devices, gauges (e.g., gages for vehicles, aircraft, and ships), a flight simulator, various monitors such, can be applied to the projection type display device such as a projector. In particular, televisions have a remarkable tendency to increase the size of display units in recent years. However, in electronic devices having such a large display unit (for example, a display unit having a diagonal length of 80 cm or more), conventional color filter inks are used. When the color filter manufactured using the filter is applied, problems such as color unevenness and density unevenness are particularly likely to occur. However, the ink for color filter is discharged while applying the cleaning liquid of the present invention to the droplet discharge device. Thus, the occurrence of such a problem can be surely prevented. That is, when applied to an electronic device having a large display unit as described above, the effects of the present invention are more remarkably exhibited.

As mentioned above, although this invention was demonstrated based on suitable embodiment, this invention is not limited to these.
For example, in the above-described embodiment, after applying the color filter ink corresponding to the colored portion of each color into the cell, the liquid medium is removed from the color filter ink of each color in the cell and cured. In the above description, the coloring resin forming step (curing step) is performed only once. However, the ink application step and the coloring portion forming step are repeated for each color. Also good.

In addition, each part of the color filter, the image display device, and the electronic device can be replaced with any one that exhibits the same function, or other configurations can be added. For example, in the present invention, the color filter may be provided with a protective film covering the colored portion on the side of the colored portion opposite to the surface facing the substrate. Thereby, damage, deterioration, etc. of a coloring part can be prevented more effectively.
Further, the cleaning liquid may have been subjected to processing such as deaeration. Thereby, the dissolved gas melt | dissolved in the washing | cleaning liquid can be removed reliably. For this reason, bubbles and the like can be reliably prevented from remaining in the ink flow path and the like during cleaning with the cleaning liquid.

In the above-described embodiment, the case where the cleaning liquid is used only for cleaning the ink such as the ink flow path has been mainly described. However, the cleaning liquid of the present invention is for cleaning other portions. May be.
Further, for example, the cleaning liquid may be used to fill the ink flow path when the liquid droplet ejection apparatus is stopped. By filling the ink flow path with the liquid in this way, it is possible to maintain the wettability of the ink flow path of the droplet discharge device, particularly the wettability of the discharge port.

Further, for example, when the ink flow path of the droplet discharge device is not filled with the liquid, the cleaning liquid may be flowed to fill the ink flow path with the liquid. After flowing the cleaning liquid, the ink can be efficiently filled by filling the flow path with the ink.
Further, in the above-described embodiment, the liquid droplet ejection apparatus has been described as including the ink storage tank and the cleaning liquid storage tank, but the liquid droplet ejection apparatus may not include these.

  In the above-described embodiment, the case where the color filter ink set includes the three types (three colors) of color filter inks corresponding to the three primary colors of light has been mainly described, but the color filter ink set is configured. The number and type (color) of the color filter ink to be performed are not limited to those described above. For example, in the present invention, the color filter ink set may include four or more color filter inks.

Next, specific examples of the present invention will be described.
[1] Synthesis of polymer (Synthesis Example 1)
A reaction vessel (flask) equipped with a stirrer, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer was charged with 100 parts by weight of diethylene glycol monobutyl ether acetate as a solvent (liquid medium) and heated to 80 ° C. . Subsequently, 2- [O- (1'-methylpropylideneamino) carboxyamino] ethyl methacrylate (= 2- (1-methylpropylideneaminooxycarbonylaminoethyl) as the monomer component m1 was placed in the flask. ) Methacrylate): 60 parts by weight, methacrylic acid as monomer component m2: 20 parts by weight, stearyl methacrylate as monomer component m3: 20 parts by weight in diethylene glycol monobutyl ether acetate: 30 parts by weight It dropped in the flask over 4 hours using the dripping pump. On the other hand, a solution prepared by dissolving 5 parts by weight of azobisdimethylvaleronitrile as a radical initiator (polymerization initiator) in 90 parts by weight of diethylene glycol monobutyl ether acetate was added to the flask for 4 hours using another dropping pump. It was dripped in. After completion of dropping of the polymerization initiator, the temperature is maintained (aged) at the same temperature for 4 hours, and then cooled to room temperature, and the monomer component m1, m2, m3 and represented by the above formula (8) A polymer M1 as a combined M was obtained.
(Synthesis Examples 2 to 8)
The same as Synthesis Example 1 except that the solvent (liquid medium) used for polymer synthesis, the types of monomer components, the ratio of each component were adjusted, and the composition of the polymer was changed as shown in Table 1. Was performed. As a result, seven types of polymers M (polymers M2 to M8) were obtained.

(Synthesis Example 9)
In a reaction vessel (flask) equipped with a stirrer, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer, 314 parts by weight of diethylene glycol monobutyl ether acetate as a solvent (liquid medium) was added and heated to 90 ° C. . Subsequently, 2,2′-azobis (isobutyronitrile) (AIBN) as a radical initiator: 20 parts by weight and diethylene glycol monobutyl ether acetate (solvent): 30 parts by weight were added to the flask. The monomer component (compound) represented by the above formula (11) x1: 180 parts by weight, the monomer component (compound) represented by the above formula (12) x2: 90 parts by weight, the above formula (13) Monomer component (compound) x3: 15 parts by weight, monomer component (compound) x4: 15 parts by weight represented by the above formula (14), 2,2′-azobis (isobutyronitrile) ) (AIBN): A solution prepared by dissolving 50 parts by weight of diethylene glycol monobutyl ether acetate: 200 parts by weight was added dropwise using a dropping pump over 5 hours, and further aged for 4 hours. Then, it cooled to room temperature and obtained the polymer X1 as the polymer X represented by the said Formula (19) including the monomer components x1, x2, x3, x4.
(Synthesis Examples 10 to 16)
The same operation as in Synthesis Example 9 was performed, except that the type of solvent (liquid medium) used in the synthesis of the polymer and the ratio of each component were adjusted and the composition of the polymer was changed as shown in Table 1. . As a result, seven types of polymers X (polymers X2 to X8) were obtained.

(Synthesis Example 17)
In a reaction vessel (flask) equipped with a stirrer, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer, 314 parts by weight of diethylene glycol monobutyl ether acetate as a solvent (liquid medium) was added and heated to 90 ° C. . Subsequently, 2,2′-azobis (isobutyronitrile) (AIBN) as a radical initiator: 20 parts by weight and diethylene glycol monobutyl ether acetate (solvent): 30 parts by weight were added to the flask. , Monomer component (compound) y1: 200 parts by weight represented by the formula (15), monomer component (compound) y2 represented by the formula (16): 100 parts by weight, 2,2′- A solution obtained by dissolving 50 parts by weight of azobis (isobutyronitrile) (AIBN) in 200 parts by weight of diethylene glycol monobutyl ether acetate was added dropwise over 5 hours using a dropping pump, and the mixture was further aged for 4 hours. Then, it cooled to room temperature and obtained the polymer Y1 as the polymer Y containing the monomer components y1 and y2 and represented by the said Formula (20).
(Synthesis Examples 18 and 19)
The same operation as in Synthesis Example 17 was performed except that the type of solvent (liquid medium) used for polymer synthesis and the ratio of each component were adjusted and the composition of the polymer was changed as shown in Table 1. . As a result, two types of polymers Y (polymers Y2 and Y3) were obtained.

(Synthesis Example 20)
Into a reaction vessel (flask) equipped with a stirrer, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer, 246 parts by weight of diethylene glycol monobutyl ether acetate as a solvent (liquid medium) was added and heated to 80 ° C. . Subsequently, in the flask, the monomer component (compound) represented by the above formula (21) z1: 276 parts by weight, the monomer component (compound) represented by the above formula (22) z2: 51 weights. A solution prepared by dissolving 39 parts by weight of azobisdimethylvaleronitrile as a radical initiator in 360 parts by weight of diethylene glycol monobutyl ether acetate was added dropwise using a dropping pump over 5 hours, and further aged for 3 hours.
Thereafter, 26 parts by weight of glycidyl methacrylate and 2 parts by weight of methoquinone were added to the flask and reacted at 110 ° C. for 10 hours. Then, it cooled to room temperature and obtained the polymer Z1 as the polymer Z represented by the said Formula (24) including the monomer components z1, z2, and z3.
(Synthesis Examples 21 and 22)
The same operation as in Synthesis Example 20 was performed except that the type of solvent (liquid medium) used for polymer synthesis and the ratio of each component were adjusted and the composition of the polymer was changed as shown in Table 1. . As a result, two types of polymers Z (polymers Z2 and Z3) were obtained.

(Synthesis Example 23)
A reaction vessel (flask) equipped with a stirrer, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer was charged with 180 parts by weight of diethylene glycol monobutyl ether acetate as a solvent (liquid medium) and heated to 85 ° C. . Subsequently, the monomer component (compound) w1: 188 parts by weight represented by the above formula (25) and the monomer component (compound) w2 represented by the above formula (26) w: 34 weights in the flask. Parts: monomer component (compound) w3: 74 parts by weight represented by formula (27) above, monomer component (compound) w4: 74 parts by weight represented by formula (28) above, as radical initiator A solution obtained by dissolving 64 parts by weight of azobisdimethylvaleronitrile in 386 parts by weight of diethylene glycol monobutyl ether acetate was added dropwise over 5 hours using a dropping pump, and further aged for 3 hours. Then, it cooled to room temperature and obtained the polymer W1 as the polymer W represented by the said Formula (29) including the monomer components w1, w2, w3, and w4.
(Synthesis Examples 24 and 25)
The same operation as in Synthesis Example 23 was performed except that the type of solvent (liquid medium) used for polymer synthesis and the ratio of each component were adjusted and the composition of the polymer was changed as shown in Table 1. . As a result, two types of polymers W (polymers W2 and W3) were obtained.

In Table 1, the ratio of each monomer component which comprises each polymer synthesize | combined by the synthesis examples 1-25, and the weight average molecular weight Mw of each polymer were shown collectively. In the table, methacrylic acid 2- [O- (1′-methylpropylideneamino) carboxyamino] ethyl (= 2- (1-methylpropylideneaminooxycarbonylaminoethyl) methacrylate) is represented by “m1a” and methacrylic acid. 2- (3,5-dimethylpyrazol-1-yl) carbonylaminoethyl is denoted by “m1b”, 2- (3,5-dimethylpyrazol-1-yl) carbonylaminoethyl acrylate is denoted by “m1c”, Methacrylic acid is indicated by “m2a”, acrylic acid is indicated by “m2b”, stearyl methacrylate is indicated by “m3a”, behenyl methacrylate is indicated by “m3b”, palmityl acrylate is indicated by “m3c”, and lignoceryl methacrylate is indicated. Indicated as “m3d”, methyl methacrylate as “m4a”, acrylic Ethyl is indicated by “m4b”, pentyl acrylate is indicated by “m4c”, styrene is indicated by “m5”, 2-hydroxyethyl methacrylate is indicated by “m6”, and 3,4-epoxytricyclo [5.2. A mixture of 1.0 ^2,6 ] decan-9-yl acrylate and 3,4-epoxytricyclo [5.2.1.0 ^2,6 ] decan-8-yl acrylate was designated “m7”. The polymers synthesized as described above had a dispersity (weight average molecular weight Mw / number average molecular weight Mn) in the range of 1 or more and 3 or less.

[2] Preparation of cleaning liquid and color filter ink (Example 1)
[Preparation of cleaning solution]
Dispersic 111 as an acid value dispersant, Dispersic 166 as an amine value dispersant, Compound A represented by the following formula (36), diethylene glycol monobutyl ether acetate, diethylene glycol mononormal butyl ether, and methylpropylene triglycol Was mixed to obtain a cleaning solution.

[Preparation of color filter ink]
C. I. Pigment Red 177 and a pigment derivative represented by the above formula (30); I. A mixture of Pigment Red 254 and a pigment derivative represented by the above formula (31), a powder of a sulfonated pigment derivative having a chemical structure represented by the following formula (34), a polymer M1, a polymer X1, Polymer Y1, Polymer Z1, Polymer W1, Dispersic 111 as an acid value dispersant, Dispersic 166 as an amine value dispersant, and leveling agents (Surfinol DF58, Nissin Chemical Industry Co., Ltd.) )), Antioxidant (TINUVIN 152, manufactured by Ciba Japan Co., Ltd.), diethylene glycol monobutyl ether acetate (liquid medium), diethylene glycol mononormal butyl ether (liquid medium), and methylpropylene triglycol (liquid medium) And a red color filter ink in which a pigment is dispersed in a liquid medium ( R ink) was prepared.

  In addition, the color filter ink (G ink) and the blue color filter ink (B ink) are the same as the red color filter ink except that the type of pigment and the amount of each component used are changed. Was prepared. As a result, an ink set for a color filter composed of three colors of R, G, and B was obtained. The average particle diameter of the pigment constituting the R ink, the average particle diameter of the pigment constituting the G ink, and the average particle diameter of the pigment constituting the B ink were 70 nm, 70 nm, and 70 nm, respectively.

(Examples 2 to 5)
A cleaning solution was prepared in the same manner as in Example 1 except that the type and amount of materials used for the preparation of the cleaning solution were changed as shown in Table 2.
In addition, a color filter ink (color filter ink set) was prepared in the same manner as in Example 1 except that the types and amounts of materials used for preparing the color filter ink were changed as shown in Table 5. .

(Example 6)
Dispersic 111 as an acid value dispersant, Dispersic 166 as an amine value dispersant, Compound A represented by the above formula (36), diethylene glycol monobutyl ether acetate, diethylene glycol mononormal butyl ether, and methylpropylene triglycol And C.I. I. Pigment Red 177 and a pigment derivative represented by the above formula (30); I. By mixing a mixture of Pigment Red 254 and the pigment derivative represented by the above formula (31) with a powder of a sulfonated pigment derivative having a chemical structure represented by the following formula (34), A cleaning liquid (R cleaning liquid) was obtained.

Further, a cleaning liquid containing a green pigment (G cleaning liquid) and a cleaning liquid containing a blue pigment (B cleaning liquid) were prepared in the same manner as the cleaning liquid containing the red pigment except that the type of pigment and the amount of each component used were changed. . As a result, a cleaning liquid set comprising three types of R cleaning liquid, G cleaning liquid, and B cleaning liquid was obtained. That is, in this example, a cleaning liquid set including a plurality of types of cleaning liquids corresponding to each color filter ink constituting the color filter ink set was obtained. The average particle diameter of the pigment constituting the R cleaning liquid, the average particle diameter of the pigment constituting the G cleaning liquid, and the average particle diameter of the pigment constituting the B cleaning liquid were 50 nm, 50 nm, and 50 nm, respectively.
The color filter ink was prepared in the same manner as in Example 1.

(Examples 7 to 10)
A cleaning liquid (cleaning liquid set) was obtained in the same manner as in Example 6 except that the types and amounts of materials used for the preparation of the cleaning liquid were changed as shown in Tables 2 and 3.
In addition, the color filter ink (color filter ink set) was used in the same manner as in Example 1 except that the types and amounts of materials used for preparing the color filter ink were changed as shown in Tables 5 and 6. Was prepared.

(Example 11)
A cleaning liquid (cleaning liquid set) was obtained in the same manner as in Example 6 except that zirconia (ZrO ₂ ) particles as ceramic particles were used for the preparation of each cleaning liquid constituting the cleaning liquid set.
The color filter ink was prepared in the same manner as in Example 1.

(Examples 12 to 15)
A cleaning liquid (cleaning liquid set) was obtained in the same manner as in Example 11 except that the types and amounts of materials used for the preparation of the cleaning liquid were changed as shown in Table 3.
In addition, a color filter ink (color filter ink set) was prepared in the same manner as in Example 1 except that the types and amounts of materials used for preparing the color filter ink were changed as shown in Table 6. .

(Example 16)
A cleaning liquid (cleaning liquid set) was obtained in the same manner as in Example 6 except that glass particles as ceramic particles were further used for the preparation of each cleaning liquid constituting the cleaning liquid set. The glass particles include alkali-free glass (SiO ₂ : 55.0 wt%, CaO: 23.0 wt%, Al ₂ O ₃ : 14.2 wt%, B ₂ O ₃ : 5.8 wt%, MgO: 0.0. _{2wt%, Na 2 O: 0.4wt} %, K 2 O: 0.2wt%, Fe 2 O 3: 0.2wt%, TiO 2: 0.4wt%, F 2: 0.5wt%, SrO: 0 .1 wt%) was used.
The color filter ink was prepared in the same manner as in Example 1.

(Examples 17 to 20)
A cleaning liquid (cleaning liquid set) was obtained in the same manner as in Example 16 except that the types and amounts of materials used for the preparation of the cleaning liquid were changed as shown in Table 4.
In addition, a color filter ink (color filter ink set) was prepared in the same manner as in Example 1 except that the types and amounts of materials used for preparing the color filter ink were changed as shown in Table 7. .

(Comparative Example 1)
A cleaning liquid was prepared in the same manner as in Example 1 except that the amount of diethylene glycol monobutyl ether acetate, diethylene glycol mononormal butyl ether and methylpropylene triglycol was changed without using Compound A.
The color filter ink was prepared in the same manner as in Example 1.

(Comparative Examples 2 to 4)
A cleaning liquid (cleaning liquid set) was obtained in the same manner as in Comparative Example 1 except that the types and amounts of materials used for the preparation of the cleaning liquid were changed as shown in Table 7.
The color filter ink was prepared in the same manner as in Example 1.

Tables 2, 3 and 4 collectively show the composition of the cleaning solution for each of the Examples and Comparative Examples. The composition of the color filter ink is shown in Table 5, Table 6, and Table 7. In the table, C.I. I. Pigment Red 177 is “PR177”, C.I. I. Pigment Red 254 is "PR254", C.I. I. Pigment Red 177 and a pigment derivative represented by the formula (30) were mixed with “PR177D”, C.I. I. “PR254D” is a mixture of Pigment Red 254 and the pigment derivative represented by Formula (31), and a powder composed of the pigment derivative (one sulfo group in the molecule) represented by Formula (34) is “ SPD1 ”, a powder composed of a pigment derivative represented by the following formula (35) (two sulfo groups in the molecule) is designated“ SPD2 ”, C.I. I. Pigment Green 36 is “PG36”, C.I. I. Pigment Green 58 is changed to “PG58”, C.I. I. Pigment Blue 15: 6 is changed to “PB15: 6”, C.I. I. Pigment Yellow 150 is changed to “PY150”, C.I. I. Pigment Violet 23 is “PV23”, Dispersic 111 (acid value: 50 KOHmg / g) is “DA1”, Dispersic 2095 (acid value: 13 KOHmg / g) is “DA2”, Dispersic P104 (acid value: 360 KOHmg / g) ) “DA3”, Dispersic 166 (amine number: 115 KOHmg / g) “DA4”, Dispersic 9075 (amine number: 12 KOHmg / g) “DA5”, Dispersic 2001 “DA6”, leveling agent (surf Nord DF58, manufactured by Nissin Chemical Industry Co., Ltd.) “DF58”, leveling agent (LHP-90, manufactured by Enomoto Kasei Co., Ltd.) “L90”, and leveling agent (LHP-95, manufactured by Enomoto Kasei Co., Ltd.) “L95” ”, Leveling agent (Olfin SPC, manufactured by Nissin Chemical Industry Co., Ltd.) SPC ", antioxidant (TINUVIN 152, manufactured by Ciba Japan Co., Ltd.)" T152 ", diethylene glycol monobutyl ether acetate" S1 ", 1,3-butylene glycol diacetate" S2 ", 2- (2-methoxy- 1-methylethoxy) -1-methylethyl acetate “S3”, bis (2-butoxyethyl) ether “S4”, ethyl octoate “S5”, diethylene glycol mononormal butyl ether “S6”, triethylene glycol mono Normal butyl ether “S7”, ethyl 3-ethoxypropionate “S8”, methylpropylene triglycol “S9”, diethylene glycol methyl ethyl ether “S10”, diethylene glycol dimethyl ether “S11”, diethylene Recall diethyl ether "S12", showed zirconia particles "Z", the glass particles in the "G". The amine value of the dispersant was determined by a method according to DIN 16945, and the acid value was determined by a method according to DIN EN ISO 2114. In addition, C.I. used in each example and each comparative example. I. The content of the pigment derivative represented by the formula (30) in the mixture of Pigment Red 177 and the pigment derivative represented by the formula (30) was 0.1 wt% or more and 10 wt% or less. In addition, C.I. used in each of the above examples and comparative examples. I. The content of the pigment derivative represented by the formula (31) in the mixture of Pigment Red 254 and the pigment derivative represented by the formula (31) was 0.1 wt% or more and 10 wt% or less. In addition, the viscosity at 25 ° C. of the color filter ink of each of the above examples measured according to JIS Z8809 using a vibration viscometer is in the range of 5 mPa · s to 11 mPa · s. Value. In Examples 6 to 20, the pigment constituting the color filter ink and the pigment constituting the cleaning liquid corresponding to the color filter ink have the same color system, and these color differences are all 5 It was the following. In Examples 6 to 20, the average particle diameter of the pigment constituting the color filter ink was larger than the average particle diameter of the pigment constituting the cleaning liquid corresponding to the color filter ink. In Examples 11 to 20, when the average particle diameter of the pigment constituting the color filter ink is D _P [nm] and the average particle diameter of the ceramic particles constituting the cleaning liquid is D _C [nm], Also, the relationship of 0.25 ≦ D _C / D _P ≦ 0.7 was satisfied.

[3] Evaluation of cleaning properties and ease of replacement of cleaning liquid The color filter ink prepared in each of the above Examples and Comparative Examples was enclosed in a Teflon tube ("Teflon" is a registered trademark) with an inner diameter of 2 mm and a length of 30 cm. And left to stand in an environment of 35 ° C. for 20 days. Thereafter, the cleaning liquid prepared in each of the above Examples and Comparative Examples was passed through a Teflon tube (“Teflon” is a registered trademark) at a flow rate of 1.5 ml / min for 120 seconds. Next, a liquid (colorless liquid) having a composition obtained by removing the solid content from each cleaning liquid was passed through a Teflon tube (“Teflon” is a registered trademark) at a flow rate of 1.0 ml / min for 60 seconds. When the liquid (colorless liquid) had been poured, the remaining state of the solid content in the tube was visually observed and evaluated according to the following five-stage criteria.

A: There is no solid content in the tube.
B: Almost no solid content remains in the tube.
C: Remaining solid content in the tube is slightly observed.
D: The solid content remains clearly in the tube.
E: Remaining solid content in the tube is noticeable.

[4] Droplet discharge stability evaluation (discharge stability evaluation)
Using the color filter inks of the respective Examples and Comparative Examples, evaluations by the following tests were performed.
[4.1] Evaluation of landing position accuracy Prepared are a droplet discharge device as shown in FIGS. 1 to 4 installed in a chamber (thermal chamber), and ink sets for color filters of the respective examples and comparative examples, With the drive waveform of the piezo element optimized, continuous ejection of 2000 million (2,000,000) droplets from each nozzle of the droplet ejection head for each color ink in an environment of 25 ° C. and 55% RH. went. Thereafter, the operation of the droplet discharge device was stopped, and the droplet discharge device was left in an environment of 35 ° C. and 55% RH for 360 hours in a state where each flow channel was filled with ink. Thereafter, the flow paths of the respective inks of the respective Examples and Comparative Examples were washed with the corresponding cleaning liquids (the cleaning liquids containing the same color pigments in Examples 6 to 20). Cleaning was performed by flowing the cleaning solution at a flow rate of 1.0 ml / min for 300 seconds. After washing, the same ink as above was filled again in the ink flow path of the droplet discharge device. Filling was performed by flowing the color filter ink at a flow rate of 1.0 ml / min for 300 seconds in the ink flow path. Subsequently, 2000 million (2,000,000 drops) of droplets were continuously discharged from each nozzle of the droplet discharge head in an environment of 25 ° C. and 55% RH. Deviation amount d from the center target position of the center position of each of the landed droplets of the 2000 million droplets ejected from the designated nozzle near the center of the droplet ejection head after filling the color filter ink The average value was obtained and evaluated according to the following five-step criteria. It can be said that the smaller the value is, the more effectively the occurrence of flight bending is prevented.

A: The average value of the shift amounts d is less than 0.09 μm.
B: The average value of the shift amount d is 0.09 μm or more and less than 0.15 μm.
C: The average value of the shift amount d is 0.15 μm or more and less than 0.18 μm.
D: The average value of the shift amounts d is 0.18 μm or more and less than 0.22 μm.
E: The average value of the shift amounts d is 0.22 μm or more.

[4.2] Evaluation of stability of droplet discharge amount Regarding the droplet discharge device used in the evaluation of [4.1] above, the droplet discharge is performed again after continuous discharge of the above 2000 million (2,000,000 drops) droplets. The operation of the apparatus was stopped, and the ink was filled in the flow path of the droplet discharge apparatus and left in an environment of 35 ° C. and 55% RH for 240 hours. Thereafter, the flow paths of the respective inks of the respective Examples and Comparative Examples were washed with the corresponding cleaning liquids (the cleaning liquids containing the same color pigments in Examples 6 to 20). Cleaning was performed by flowing the cleaning solution at a flow rate of 1.0 ml / min for 300 seconds. After washing, the same ink as above was filled again in the ink flow path of the droplet discharge device. Filling was performed by flowing the color filter ink at a flow rate of 1.0 ml / min for 300 seconds in the ink flow path. Subsequently, 1500000 droplets (1500000 droplets) were continuously discharged from each nozzle of the droplet discharge head in an environment of 25 ° C. and 55% RH. For the two specified nozzles on the left and right ends of the droplet discharge head, the total weight of the discharged droplets is obtained, and the absolute value ΔW [ng] of the difference between the average discharge amounts of the droplets discharged from the two nozzles is calculated. Asked. A ratio (ΔW / W _T ) of ΔW with respect to the target discharge amount W _T [ng] of the droplet was obtained and evaluated according to the following five-stage criteria. As the value of [Delta] W / W _T is small, it can be said that the greater the stability of the droplet discharge amount.

A: The value of ΔW / _{W T} is less than 0.090.
B: The value of ΔW / _{W T} is less than 0.090 than 0.320.
C: The value of ΔW / _{W T} is less than 0.320 than 0.620.
D: The value of ΔW / _{W T} is less than 0.620 than 0.840.
E: The value of ΔW / _{W T} is 0.840 or more.

[4.3] Evaluation of intermittent printing performance With respect to the droplet discharge device used in the evaluation of [4.2], the droplet discharge device is operated again after continuous discharge of the above 1500000 (1500000 droplets). The ink was stopped and left in an environment of 35 ° C. and 55% RH for 240 hours with each ink filled in the flow path of the droplet discharge device. Thereafter, the flow paths of the respective inks of the respective Examples and Comparative Examples were washed with the corresponding cleaning liquids (the cleaning liquids containing the same color pigments in Examples 6 to 20). Cleaning was performed by flowing the cleaning solution at a flow rate of 1.0 ml / min for 300 seconds. After washing, the same ink as above was filled again in the ink flow path of the droplet discharge device. Filling was performed by flowing the color filter ink at a flow rate of 1.0 ml / min for 300 seconds in the ink flow path. Thereafter, 200000 droplets (200000 droplets) were continuously discharged from each nozzle of the droplet discharge head in an environment of 25 ° C. and 55% RH, and then the droplet discharge was interrupted for 180 seconds. (First sequence). Thereafter, similarly, the operation of continuously discharging the droplets and interrupting the discharge of the droplets were repeated. For the designated nozzle near the center of the droplet discharge head, the average weight W ₁ [ng] of the droplets discharged in the first sequence and the average weight W ₃₀ [ng] of the droplets discharged in the 30th sequence And asked. Then, the ratio (| W ₁ −W ₃₀ | / W _T ) of the absolute value of the difference between W ₁ and W ₃₀ to the target discharge amount W _T [ng] of the droplet is obtained, and the following five criteria are used. ,evaluated. | _W 1 _-W 30 | as the value of / _{W T} is small, it can be said to be excellent in intermittent printing performance (stability of the droplet discharge quantity).

_A: | _{W 1} -W 30 | value of / _{W T} is less than 0.060.
_B: | _{W 1} -W 30 | values of / _{W T} is less than 0.060 or 0.150.
_C: | _{W 1} -W 30 | values of / _{W T} is less than 0.150 or 0.470.
_D: | _{W 1} -W 30 | values of / _{W T} is less than 0.470 or 0.730.
_E: | _{W 1} -W 30 | value of / _{W T} is 0.730 or more.

[4.4] Continuous Discharge Test Regarding the droplet discharge device used in the evaluation of [4.3], the droplet discharge device is stopped again after the 30th sequence of droplet discharge, and the droplet discharge is performed. With each ink filled in the flow path of the apparatus, it was left for 240 hours in an environment of 35 ° C. and 55% RH. Thereafter, the flow paths of the respective inks of the respective Examples and Comparative Examples were washed with the corresponding cleaning liquids (the cleaning liquids containing the same color pigments in Examples 6 to 20). Cleaning was performed by flowing the cleaning solution at a flow rate of 1.0 ml / min for 300 seconds. After washing, the same ink as above was filled again in the ink flow path of the droplet discharge device. Filling was performed by flowing the color filter ink at a flow rate of 1.0 ml / min for 300 seconds in the ink flow path. Thereafter, each of the nozzles of the color filter ink set is continuously discharged from each nozzle of the droplet discharge head by continuously operating the droplet discharge device for 400 hours in an environment of 25 ° C. and 55% RH. Went.
The nozzle clogging rate ([(number of clogged nozzles) / (total number of nozzles)] × 100) obtained after continuous operation is found and the nozzles are clogged. With respect to the above, it was examined whether or not clogging can be eliminated by a cleaning member made of a plastic material. The results were evaluated according to the following five-step criteria.

A: No nozzle clogging occurs.
B: The occurrence rate of nozzle clogging is less than 0.7% (excluding zero), and clogging can be eliminated by cleaning.
C: The occurrence rate of nozzle clogging is 0.7% or more and less than 1.2%, and clogging can be eliminated by cleaning.
D: The occurrence rate of nozzle clogging is 1.2% or more and less than 1.5%, and clogging can be eliminated by cleaning.
E: The occurrence rate of nozzle clogging is 1.5% or more, or clogging cannot be eliminated by cleaning.
In addition, said evaluation was performed on the same conditions about each Example and each comparative example.

[5] Manufacture of color filter For the droplet discharge device used in the evaluation of [4.4] above, after the 600 hours of continuous operation, the operation of the droplet discharge device was stopped again, and the flow of the droplet discharge device With each ink filled in the path, it was left in an environment of 35 ° C. and 55% RH for 240 hours. Thereafter, the flow paths of the respective inks of the respective Examples and Comparative Examples were washed with the corresponding cleaning liquids (the cleaning liquids containing the same color pigments in Examples 6 to 20). Cleaning was performed by flowing the cleaning solution at a flow rate of 1.0 ml / min for 300 seconds. After washing, the same ink as above was filled again in the ink flow path of the droplet discharge device. Filling was performed by flowing the color filter ink at a flow rate of 1.0 ml / min for 300 seconds in the ink flow path.

Thereafter, the color filter ink was ejected into the cell (region surrounded by the partition wall) of the substrate provided with the partition wall. At this time, three color filter inks were used so that the color filter inks of the respective colors were not mixed. In each cell, the color filter ink was applied in such an amount that the average thickness of the colored portion to be formed was 2.0 μm.
The board | substrate provided with the partition was manufactured as follows.

First, a soda glass substrate (G5 size: 1100 × 1300 mm) on which a silica (SiO ₂ ) film for preventing elution of sodium ions was formed on both surfaces was prepared and subjected to a cleaning treatment.
Next, the radiation-sensitive composition for forming partition walls containing carbon black was applied to the entire surface of one of the cleaned substrates to form a coating film.
Next, prebaking was performed under the conditions of heating temperature: 110 ° C. and heating time: 120 seconds.

Thereafter, radiation is applied through a photomask, post-exposure baking (PEB) is performed, and subsequently, atmospheric pressure in which a gas in which CF ₄ and He gas are mixed at a volume ratio of 1: 9 is introduced. With a plasma polymerization apparatus, the output is 800 W, the distance from the plasma generator to the table: 0.5 mm, the processing table speed: 10 m / s, only on the surface of the coating film that has been pre-baked and post-exposure baked. Fluorine doped. Thereafter, development processing using an alkali developer was performed, and further, post-baking processing was performed to form partition walls. PEB was performed under the conditions of heating temperature: 110 ° C., heating time: 120 seconds, and radiation irradiation intensity: 150 mJ / cm ² . The development process was performed by, for example, a vibration dipping method. The development processing time was 60 seconds. Moreover, the post-baking process was performed on the conditions of heating temperature: 140 degreeC and heating time: 10 minutes. The formed partition wall had a thickness of 2.0 μm.

After applying the color filter ink as described above in the cell (region surrounded by the partition wall) of the substrate provided with the partition wall obtained in this manner, it is performed at 80 ° C. for 20 minutes on the hot plate. The first heat treatment was performed.
Furthermore, by performing heat treatment in an oven at 240 ° C. for 50 minutes (second heat treatment), colored portions of three colors (red (R), green (G), and blue (B)) were formed. Thereafter, washing with N-methyl-2-pyrrolidone and γ-butyrolactone was performed, and a color filter as shown in FIG. 5 was obtained.

  Using the method as described above, 8000 color filters were produced using the color filter inks (ink sets) of each Example and each Comparative Example. The droplet discharge device was used by cleaning the ink flow path and refilling the ink each time discharge was completed on 1000 substrates. Further, in addition to cleaning with such a cleaning liquid, the droplet discharge device is a method (flushing) performed by discharging droplets on a portion without a substrate (work) for the color filter of the droplet discharge device, and suction means The ink flow path was periodically cleaned by a method of forcibly sucking the ink accumulated in the droplet discharge head using

[6] Evaluation of color filter The following evaluation was performed using each color filter obtained as described above.
[6.1] Flatness of Colored Part For each of the Examples and Comparative Examples, among the color filters manufactured as described above, a color filter manufactured for the 2000th sheet was prepared.
About these color filters, the difference (DELTA) D of the maximum height of a coloring part and minimum height was calculated | required using the stylus-type roughness meter (the Tencor company make, P-15), and it evaluated according to the following 5 steps | paragraphs of criteria. .

A: ΔD is less than 0.20 μm.
B: ΔD is 0.20 μm or more and less than 0.32 μm.
C: ΔD is 0.32 μm or more and less than 0.47 μm.
D: ΔD is 0.47 μm or more and less than 0.57 μm.
E: ΔD is 0.57 μm or more.

[6.2] Evaluation of contrast ratio For each of the examples and comparative examples, among the color filters manufactured as described above, the color filter manufactured for the 8000th sheet was used under the same conditions. A liquid crystal display device as shown in FIG. 7 was manufactured.
When these liquid crystal display devices are used, a red single color display, a green single color display, and a blue single color display are performed, and a single color display is not performed using a contrast tester (CT-1 manufactured by Aisaka Electric Co., Ltd.). The contrast ratio (CR) in comparison with was calculated and evaluated as follows.

In the case of a red single color display, evaluation was performed according to the following five-stage criteria.
A: CR is 2700 or more.
B: CR is 2200 or more and less than 2700.
C: CR is 1800 or more and less than 2200.
D: CR is 1500 or more and less than 1800.
E: CR is less than 1500.

In the case of green single color display, evaluation was performed according to the following five-stage criteria.
A: CR is 3600 or more.
B: CR is 3300 or more and less than 3600.
C: CR is 3000 or more and less than 3300.
D: CR is 2600 or more and less than 3000.
E: CR is less than 2600.

In the case of blue single color display, evaluation was performed according to the following five-step criteria.
A: CR is 2900 or more.
B: CR is 2500 or more and less than 2900.
C: CR is 2200 or more and less than 2500.
D: CR is 2000 or more and less than 2200.
E: CR is less than 2000.

[6.3] Color Unevenness, Density Unevenness About the liquid crystal display devices of the above Examples and Comparative Examples manufactured in [6.2], in the dark room, red single color display, green single color display, blue single color display Then, visual observation was performed in a state where white single color display was performed, and the occurrence of color unevenness and density unevenness (including those caused by light leakage) in each part was evaluated according to the following five criteria.

A: Color unevenness and density unevenness are not recognized at all.
B: Color unevenness and density unevenness are hardly recognized.
C: Color unevenness and density unevenness are slightly recognized.
D: Color unevenness and density unevenness are clearly recognized.
E: Color unevenness and density unevenness are noticeable.

[6.4] Difference in characteristics among individuals For each of the above Examples and Comparative Examples, among the color filters produced as described above, the 1st to 20th sheets and the 7480th to 7499th sheets, respectively. The manufactured color filter is prepared. In the dark room, red color display, green color display, blue color display, and white color display are performed, and colorimetry is performed using a spectrophotometer (MCPD3000, manufactured by Otsuka Electronics Co., Ltd.). did. From the results, for each example and each comparative example, the color difference (in the Lab display system) that is the largest among the color filters manufactured in the 1st to 20th sheets and 7480 to 7499th sheets (total of 40 color filters), respectively. The color difference ΔE) was determined and evaluated according to the following five-step criteria.

A: Color difference (ΔE) is less than 1.8.
B: Color difference (ΔE) is 1.8 or more and less than 3.0.
C: Color difference (ΔE) is 3.0 or more and less than 3.9.
D: Color difference (ΔE) is 3.9 or more and less than 4.9.
E: Color difference (ΔE) is 4.9 or more.

[6.5] Durability test For each of the above examples and comparative examples, among the color filters manufactured as described above, the same conditions were used, using the color filters manufactured in the 5001st to 5010th sheets, respectively. A liquid crystal display device as shown in FIG. 7 was manufactured.
Using these liquid crystal display devices, light leakage (white spots, bright spots) occurs when visual observation is performed in a dark room with red single color display, green single color display, and blue single color display. Confirmed that there is no.

Next, the color filter was removed from the liquid crystal display device.
Each removed color filter was placed in a 20 ° C. environment for 1.5 hours, then in a 75 ° C. environment in 2.5 hours, then in a 20 ° C. environment in 1.5 hours, and then −15 ° C. It was left in the environment for 2.5 hours. Thereafter, the ambient temperature was returned again to 20 ° C., which was set to one cycle (8 hours), and this cycle was repeated 30 times in total (total 240 hours).

Thereafter, using these color filters, a liquid crystal display device as shown in FIG. 7 was assembled again.
Using these liquid crystal display devices, visual observation is performed in a dark room with red single color display, green single color display, and blue single color display, and the occurrence of light leakage (white spots, bright spots) is observed. The evaluation was made according to the following 6-step criteria.

A: There is no color filter in which light leakage (white spots, bright spots) occurs.
B: Light leakage (white spots, bright spots) is observed in one or two color filters.
C: Light leakage (white spots, bright spots) is observed in 3 to 4 color filters.
D: Light leakage (white spots, bright spots) is observed in 5 to 7 color filters.
E: Light leakage (white spots, bright spots) is observed in 8 to 9 color filters.
F: Light leakage (white spots, bright spots) is observed in 10 color filters.
These results are shown in Table 8, Table 9, and Table 10.

As is clear from Tables 8, 9, and 10, excellent results were obtained in the present invention, whereas satisfactory results were not obtained in the comparative example.
Moreover, when a commercially available liquid crystal television was disassembled and the liquid crystal display device part was replaced with one manufactured as described above, and the same evaluation as described above was performed, the same result as above was obtained.

  DESCRIPTION OF SYMBOLS 1 ... Color filter 11 ... Board | substrate 12 ... Coloring part 12A ... 1st coloring part 12B ... 2nd coloring part 12C ... 3rd coloring part 13 ... Partition (bank, light-shielding part) 14 ... Cell 2 ... Color filter ink DESCRIPTION OF SYMBOLS 3 ... Coating film 4 ... Cleaning liquid 60 ... Liquid crystal display device 61 ... Common electrode 62 ... Liquid crystal layer 63, 64 ... Orientation film 65 ... Pixel electrode 66 ... Substrate (counter substrate) 67, 68 ... Polarizing plate 100 ... Droplet discharge device 101 DESCRIPTION OF SYMBOLS ... Tank 102 ... Discharge scanning part 103 ... Droplet discharge means 104 ... 1st position control apparatus 105 ... Carriage 106 ... Stage 108 ... 2nd position control apparatus 110 ... Tube 112 ... Control means 114 ... Droplet discharge head (inkjet head) 116A, 116B ... Nozzle row 118 ... Nozzle 120 ... Cavity 122 ... Bulkhead 124 ... Vibrator 24A, 124B ... Electrode 124C ... Piezo element 126 ... Vibration plate 127 ... Discharge unit 128 ... Nozzle plate 129 ... Liquid pool 130 ... Supply port 131 ... Hole 132 ... Ink storage tank 133 ... Cleaning liquid storage tank 134 ... Conveyance path 1000 ... Image display Device 1100 ... Personal computer 1102 ... Keyboard 1104 ... Main body 1106 ... Display unit 1200 ... Mobile phone 1202 ... Operation button 1204 ... Earpiece 1206 ... Mouthpiece 1300 ... Digital still camera 1302 ... Case (body) 1304 ... Light receiving unit 1306 ... Shutter button 1308 ... Circuit board 1312 ... Video signal output terminal 1314 ... Input / output terminal for data communication 1430 ... Television monitor 1440 ... Personal computer

Claims (14)

A cleaning liquid for cleaning an ink droplet discharge device that includes a colorant, a resin material, and a liquid medium that dissolves or disperses the colorant, which is used in manufacturing an ink-jet color filter,
A cleaning solution comprising a compound A represented by the following formula (10):

  The cleaning liquid according to claim 1, wherein a content ratio of the compound A in the cleaning liquid is 40 wt% or more.   The cleaning liquid according to claim 1, wherein the cleaning liquid further contains the same component as the liquid medium constituting the ink in addition to the compound A.   The cleaning liquid further contains at least one selected from the group consisting of diethylene glycol monobutyl ether acetate, diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether, diethylene glycol diethyl ether, and 1,3-butylene glycol diacetate in addition to the compound A. Item 4. The cleaning liquid according to Item 3.   The cleaning liquid according to any one of claims 1 to 4, further comprising a dispersant in addition to the compound A.   The cleaning liquid according to claim 5, wherein the cleaning liquid contains the same dispersant as the dispersant constituting the ink.   The cleaning liquid according to claim 5 or 6, comprising an acid value dispersant having a predetermined acid value and an amine value dispersant having a predetermined amine value as the dispersant. When the content of the acid value dispersant is X _A [wt%] and the content of the amine value dispersant is X _B [wt%], the relationship 0.1 ≦ X _A / X _B ≦ 1 is satisfied. The cleaning liquid according to claim 7. The acid value of the acid value dispersant is AV [KOH mg / g], the amine value of the amine value dispersant is BV [KOH mg / g], the content of the acid value dispersant is X _A [wt%], the amine 9 or 8 satisfying the relationship of 0.01 ≦ (AV × X _A ) / (BV × X _B ) ≦ 1.9, where X _B [wt%] is the content of the valent dispersant. Cleaning solution. The cleaning liquid comprises a monomer component m1 represented by the following formula (1), a monomer component m2 having a carboxyl group or an acid anhydride group, and a monomer represented by the following formula (3) as the resin material. The cleaning liquid according to any one of claims 1 to 9, wherein the cleaning liquid is used for cleaning the droplet discharge device that discharges the ink including the polymer M including the component m3.

The cleaning liquid includes a monomer component x1 represented by the following formula (11), a monomer component x3 represented by the following formula (13), and a monomer represented by the following formula (14) as the resin material. The cleaning liquid according to claim 1, wherein the cleaning liquid is used for cleaning the droplet discharge device that discharges the ink containing the polymer X containing the component x4.

The cleaning liquid is used for cleaning the droplet discharge device that discharges the ink containing the polymer Y containing the monomer component y1 represented by the following formula (15) as the resin material. Thru | or 11 the washing | cleaning liquid in any one.

As the resin material, the cleaning liquid is a monomer component z1 represented by the following formula (21), a monomer component z2 represented by the following formula (22), and a monomer represented by the following formula (23). Polymer Z containing component z3, monomer component w1 represented by the following formula (25), monomer component w2 represented by the following formula (26), and single monomer represented by the following formula (27) The liquid droplet ejection device that ejects the ink containing at least one of the polymer W including the body component w3 and the monomer component w4 represented by the following formula (28) is used for cleaning. Item 13. A cleaning liquid according to any one of Items 1 to 12.

A droplet discharge device used for manufacturing an ink-jet color filter,
An ink storage tank for storing ink and a cleaning liquid storage tank for storing cleaning liquid;
The ink includes a colorant, a resin material, and a liquid medium that dissolves or disperses the colorant.
The liquid droplet ejection apparatus, wherein the cleaning liquid contains a compound A represented by the following formula (10).

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