JP2010197787A - Ink for color filter, color filter, image display device, and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color filter in which density irregularities and color irregularities are restrained and which is excellent in solvent resistance and luminosity and has high reliability; to provide an ink for the color filter of an inkjet system, which can be suitably used for producing the color filter and is excellent in discharge stability of a liquid droplet; and to provide an image display device equipped with the color filter, and electronic equipment. <P>SOLUTION: The ink for the color filter, which is used for producing the color filter by an ink-jet system, contains a colorant, a liquid medium for dispersing and/or dissolving the colorant, a polymer X shown by formula (7) (wherein a, b and c are each an integer of ≥1 independently), and a hydrophthalic anhydride compound. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a color filter ink, a color filter, an image display device, and an electronic apparatus.

In general, a color filter is used in 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 (coloring 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. For this reason, only a part of the coating film formed in the production of the color filter remains as a colored layer in the finally obtained color filter, and most of it is removed in the production process. Become. For this reason, not only the manufacturing cost of the color filter increases, but also from the viewpoint of resource saving.

On the other hand, in recent years, a method of forming a colored layer of a color filter using an ink jet head (droplet discharge head) has been proposed (see, for example, Patent Document 1). In such a method, the discharge position of the droplets of the colored layer forming material (colored layer forming composition) can be easily controlled and waste of the colored layer forming composition can be reduced. The manufacturing cost can be reduced.
In a method for producing a color filter using an inkjet head, cells partitioned by a partition are formed on a substrate, and color filter ink is applied to the cells. And a color filter is manufactured by forming the colored part by drying and solidifying the ink for color filters.

  However, in the method of manufacturing a color filter using an inkjet head, when droplets are ejected for a long period or when droplets are ejected continuously, the trajectory of the ejected droplets changes (so-called flight curve). In some cases, the liquid droplets cannot be landed on the site for the purpose, or the discharge amount of the liquid droplets becomes unstable. That is, there has been a problem that the droplet ejection stability is not sufficiently excellent. When such a problem occurs, a plurality of types of inks used to form colored portions of different colors may be mixed (mixed colors) on the substrate on which droplets are to be landed, or may be the same in nature. Variations in color density between multiple colored parts that are required to have a color density occur, resulting in color unevenness, density unevenness, etc. in each part of the color filter. Variations in characteristics (particularly color characteristics such as contrast ratio and color reproduction range) among a large number of color filters result in low reliability of the color filters.

Also, the droplet discharge device (industrial use) used in the manufacture of color filters is completely different from that applied to printers (consumer use). For example, mass production or large workpieces (substrates) are used. Therefore, it is required to discharge a large amount of droplets over a long period of time. Since it is used under such harsh conditions, the droplet discharge amount is likely to fluctuate more than originally used for consumer use.
Further, when the manufactured color filter is used in a liquid crystal display device, an ITO film is formed by vapor deposition after being washed with a solvent. For this reason, when a color filter is used in a liquid crystal device, excellent solvent resistance is required.

  In order to make the color filter to be manufactured have sufficient solvent resistance, the color filter ink generally contains a curable resin. However, with conventional color filter inks, curing of the curable resin tends to start in unused color filter inks, increasing the viscosity of the color filter inks, and the ejection stability of the color filter ink droplets. May not be sufficiently good.

  In addition, it may be possible to keep the viscosity of the color filter ink low by using a relatively low molecular weight curable resin, but in such a case, the curing is not sufficient and the solvent resistance is sufficiently excellent. I can't. In addition, when UV irradiation, heat treatment, etc. are performed for a long time in order to sufficiently cure, components other than the curable resin in the color filter ink deteriorate, and the brightness of the formed color filter is sufficiently high. There was a problem that should not be.

JP 2008-225124 A

  An object of the present invention is to provide a highly reliable color filter that is excellent in solvent resistance and brightness, in which density unevenness and color unevenness in each part are suppressed, and can be suitably used for producing the color filter. An object of the present invention is to provide an ink-jet color filter ink having excellent droplet ejection stability, and to provide an image display device and an electronic apparatus provided with the color filter.

これにより、各部位での濃度むら、色むらが抑制され、耐溶剤性および明度に優れた信頼性の高いカラーフィルターの製造に好適に用いることができる液滴の吐出安定性に優れたインクジェット方式のカラーフィルター用インクを提供することができる。 Such an object is achieved by the present invention described below.
The color filter ink of the present invention is a color filter ink used for producing a color filter by an inkjet method,
A colorant;
A liquid medium in which the colorant is dispersed and / or dissolved;
Polymer X containing monomer component x1 represented by the following formula (1), monomer component x2 represented by the following formula (2), and monomer component x3 represented by the following formula (3) When,
And a hydrophthalic anhydride compound.

As a result, density unevenness and color unevenness at each part are suppressed, and an ink jet system with excellent droplet ejection stability that can be suitably used for manufacturing a highly reliable color filter with excellent solvent resistance and brightness. Ink for color filters can be provided.

In the color filter ink of the present invention, the hydrophthalic anhydride compound is preferably a tetrahydrophthalic anhydride compound.
The tetrahydrophthalic anhydride compound is activated by being heated, and can accelerate the curing reaction of the polymer X more efficiently.
Further, since the reaction of the polymer X in a relatively low temperature (for example, 10 to 100 ° C.) environment is sufficiently suppressed, the color filter ink is stored when the color filter ink is stored and when droplets are discharged. The increase in the viscosity of the ink is more reliably prevented, and the discharge stability of the color filter ink droplets is particularly excellent.

In the color filter ink of the present invention, the hydrophthalic anhydride compound preferably contains one or more selected from the group of compounds represented by the following formulas (4) to (6).

These hydrophthalic anhydride compounds are activated by heating, and can accelerate the curing reaction of the polymer X more efficiently.
Further, since the reaction of the polymer X in a relatively low temperature (for example, 10 to 100 ° C.) environment is sufficiently suppressed, the color filter ink is stored when the color filter ink is stored and when droplets are discharged. The increase in the viscosity of the ink is more reliably prevented, and the discharge stability of the color filter ink droplets is particularly excellent.

In the color filter ink of the present invention, the content of the hydrophthalic anhydride compound is preferably 0.1 to 7.0 wt%.
As a result, when the color filter ink is stored, the reaction of the curable resin such as the polymer X at the time of droplet discharge is more reliably suppressed, and when heated at the time of forming the colored portion, the polymer X or the like The reaction of the curable resin can be promoted more effectively.

In the color filter ink of the present invention, the content of the polymer X in the color filter ink is C _X [wt%], and the content of the hydrophthalic anhydride compound in the color filter ink is C _PA [wt%]. It is preferable that the relationship of 0.01 ≦ C _PA / C _X ≦ 5.0 is satisfied.
As a result, when the color filter ink is stored, the reaction of the polymer X at the time of forming the colored portion is more effectively suppressed while the reaction of the polymer X at the time of storage of the droplet is more reliably suppressed. Can be promoted.

  In the color filter ink of the present invention, 1,3-butylene glycol diacetate, bis (2-butoxyethyl) ether, 2- (2-methoxy-1-methylethoxy) -1-methylethyl is used as the liquid medium. It is preferable to include one or more selected from the group consisting of acetate and diethylene glycol monobutyl ether acetate.

These compounds are low in viscosity, have little change in viscosity due to temperature, and have high affinity with the polymer X as described above. For this reason, the polymer X can be suitably dissolved in a liquid medium, and the color filter ink has a sufficiently low viscosity, and is particularly excellent in droplet discharge stability.
In addition, since the resin material such as the polymer X as described above can be suitably dissolved, even when a relatively large amount of the colorant, the resin material, etc. is included in the color filter ink, the color The change in the physical properties of the filter ink is relatively small.

The color filter of the present invention is manufactured using the color filter ink of the present invention.
Thereby, uneven density and uneven color at each part are suppressed, and a highly reliable color filter excellent in solvent resistance and brightness can be provided.
An image display device according to the present invention includes the color filter according to the present invention.
As a result, it is possible to provide a highly reliable image display apparatus including a highly reliable color filter that is excellent in solvent resistance and brightness, in which uneven density and uneven color at each part are suppressed.
The image display device of the present invention is preferably a liquid crystal panel.
As a result, it is possible to provide a highly reliable image display apparatus including a highly reliable color filter that is excellent in solvent resistance and brightness, in which uneven density and uneven color at each part are suppressed.
An electronic apparatus according to the present invention includes the image display device according to the present invention.
Thereby, density unevenness and color unevenness at each part are suppressed, and a highly reliable electronic device including a highly reliable color filter having excellent solvent resistance and brightness can be provided.

It is sectional drawing which shows suitable embodiment of the color filter of this invention. It is sectional drawing which shows the manufacturing method of a color filter. 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. 3 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. It is a figure which shows the droplet discharge head in the droplet discharge apparatus shown in FIG. 3, (a) is a cross-sectional perspective view, (b) is sectional drawing. It is sectional drawing which shows embodiment of a liquid crystal display device. 1 is a perspective view showing a configuration of a mobile (or notebook) personal computer to which an electronic apparatus of the present invention is applied. It is a perspective view which shows the structure of the mobile telephone (PHS is also included) to which the electronic device of this invention is applied. It is a perspective view which shows the structure of the digital still camera to which the electronic device of this invention is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail.
《Color filter ink》
The color filter ink of the present invention is an ink used for the production of a color filter (formation of a colored portion of a color filter), and is particularly used for the production of a color filter by an ink jet method.

The color filter ink of the present invention includes a colorant, a resin material, a liquid medium in which the colorant is dispersed or dissolved, and the like.
The color filter ink is applied to a cell provided on the substrate using a droplet discharge device, as will be described later. The color filter ink applied to the cell is removed by solidification by a process such as heating, and becomes a colored portion.
By the way, the color filter ink of the present invention is represented by the monomer component x1 represented by the following formula (1), the monomer component x3 represented by the following formula (2), and the following formula (3). A polymer X containing a monomer component x4 and a hydrophthalic anhydride compound are included.

The polymer X is a component that contributes to improvement in hardness, heat resistance and solvent resistance in the formed colored portion. The polymer X becomes a three-dimensional network polymer and is cured by application of heat or the like. Thereby, when the polymer X is sufficiently cured, the colored portion has a high hardness, and is excellent in solvent resistance and heat resistance.
Further, even when the polymer X is contained in the color filter ink, unlike a general curable resin material, the viscosity of the color filter ink is small due to the inclusion of the polymer X. Is. In addition, the polymer X is excellent in characteristics (hereinafter also referred to as “curing reaction switching characteristics”) in which the curing reaction does not substantially proceed at a predetermined temperature or lower and the curing reaction can proceed at a higher temperature. ing. For this reason, the color filter ink has excellent droplet ejection stability when droplets are ejected by the droplet ejection device, and the color filter can be suitably manufactured. The unevenness of the thickness of the colored part at each part is suppressed, and the unevenness of the density of the colored part and the uneven color at each part are suppressed.

  On the other hand, the hydrophthalic anhydride compound has a function of being activated by being heated and promoting the curing reaction of the polymer X. Thereby, the color filter ink is relatively short and can be quickly cured by heating under a low temperature condition. As a result, unintentional deterioration of the components in the color filter ink can be prevented, and a colored portion can be formed. For this reason, the colored part to be formed is prevented from being yellowed or having a reduced brightness due to deterioration of the material of the colored part.

As described above, the color filter ink of the present invention is suitable for producing a highly reliable color filter excellent in solvent resistance and lightness, in which density unevenness and color unevenness in each part are suppressed. The discharge stability is excellent.
On the other hand, when the color filter ink does not contain a hydrophthalic anhydride compound, the polymer X cannot be sufficiently cured and the solvent resistance is not sufficient. Alternatively, when the polymer X is sufficiently cured, it is necessary to perform a heat treatment for a long time or for a long time, so that the components of the color filter ink may be deteriorated, and the formed colored portion is yellowed and lightened. Will not be expensive.

Hereinafter, each component constituting the color filter ink of the present invention will be described in detail.
<Hydrophthalic anhydride compound>
Hydrophthalic anhydride compounds are compounds obtained by adding hydrogen to the aromatic nucleus of phthalic anhydride and derivatives thereof. As described above, the hydrophthalic anhydride compound is activated by being heated and has a function of accelerating the curing reaction of the compound having an epoxy group, particularly the polymer X.
Further, the hydrophthalic anhydride compound does not promote the reaction of the polymer X under a relatively low temperature (for example, 10 to 100 ° C.) environment. For this reason, when the color filter ink is stored and droplets are ejected, the viscosity of the color filter ink is prevented from increasing, and the droplet ejection stability of the color filter ink is excellent.

As described above, the hydrophthalic anhydride compound may be any compound in which hydrogen is added to the aromatic nucleus of phthalic anhydride, and examples thereof include a tetrahydrophthalic anhydride compound and a hexahydrophthalic anhydride compound. Among these, tetrahydrophthalic anhydride can obtain the above-described effects particularly remarkably.
The hydrophthalic anhydride compound may have an alkyl group such as a methyl group or an ethyl group or various functional groups.
Examples of the hydrophthalic anhydride compound include compounds represented by the following formulas (4) to (6). These hydrophthalic anhydride compounds can remarkably exhibit the effects as described above.

Among the compounds described above, the compound represented by the formula (4) is sufficiently inert under a relatively low temperature (for example, 10 to 100 ° C.) environment, and the polymer X is cured under a high temperature environment. The reaction can be promoted particularly efficiently.
The content of the hydrophthalic anhydride compound in the color filter ink is preferably 0.01 to 7.0 wt%, more preferably 0.1 to 4.0 wt%, and 0.8 to 1 More preferably, it is 5 wt%. As a result, when the color filter ink is stored, the reaction of the curable resin such as the polymer X at the time of droplet discharge is more reliably suppressed, and when heated at the time of forming the colored portion, the polymer X or the like The reaction of the curable resin can be promoted more effectively.

When the content of the polymer X in the color filter ink is C _X [wt%] and the content of the hydrophthalic anhydride compound in the color filter ink is C _PA [wt%], 0.01 ≦ C _PA / C _X ≦ 5.0 is preferably satisfied, 0.05 ≦ C _PA / C _X ≦ 1.0 is more preferably satisfied, and 0.1 ≦ C _PA / C _X ≦ It is further preferable to satisfy the relationship of 0.7. As a result, when the color filter ink is stored, the reaction of the polymer X at the time of forming the colored portion is more effectively suppressed while the reaction of the polymer X at the time of storage of the droplet is more reliably suppressed. Can be promoted.

<Resin material>
The color filter ink contains a resin material (binder resin). The resin material functions as a binder of the above-described colorant in the formed colored portion, and has a function of improving the adhesion of the colored portion to the substrate. In the color filter ink, the resin material is present as the resin material itself or a precursor thereof (monomer, oligomer, prepolymer, etc.). These resin materials are solidified or cured by applying energy such as heat when the colored portion is formed.
In the present specification, the resin material in the color filter ink will be described as a concept including not only the resin material but also a precursor (monomer, oligomer, prepolymer, etc.) thereof.

[Polymer X]
The polymer X includes a monomer component x1 represented by the above formula (1), a monomer component x2 represented by the above formula (2), and a monomer component x3 represented by the above formula (3). For example, it is represented by the following formula (7). The polymer X may be substantially composed 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, x2, and x3.
The polymer X may contain monomers other than the monomer components x1, x2, and x3, but does not contain the monomer component m3 described later.

(Monomer component x1)
The polymer X contains the monomer component x1 represented by the formula (1) 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 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 suitably advanced. That is, by containing the monomer component x1, the resin material has a characteristic that allows the curing reaction to proceed efficiently at a temperature higher than that at a predetermined temperature or less (subsequently below). , Also referred to as “curing reaction switching characteristics”). Moreover, by containing the monomer component x1 as a monomer component, the solvent resistance, heat resistance, hardness, and the like of the colored portion to be formed can be improved.

  Content of monomer component x1 in polymer X (value determined by conversion based on weight of monomer used for polymer synthesis. Hereinafter, other monomer components (including other polymers) The same applies to the content ratio of.), Preferably 30 to 90 wt%, more preferably 40 to 80 wt%. When the content of the monomer component x1 in the polymer X is a value within the above range, the above-described effects are more prominent without inhibiting the functions of the monomer components x2 and x3 described in detail later. Can be expressed. 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. The same applies to other monomer components and other polymers of the following polymer X. 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 contains the monomer component x2 represented by the above formula (2) as a monomer component.
By containing the monomer component x2 as the monomer component, the solvent resistance and the like of the formed colored portion can be made excellent. Thereby, even if it is a case where after-treatment such as chemical application and washing (especially washing using N-methyl-2-pyrrolidone or γ-butyllactone) is performed after the colored portion forming step (curing step). The occurrence of adverse effects due to these can be reliably prevented.

  In addition, the monomer component x2 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. In a heating environment such as a heat treatment applied in the forming step (curing step), the substrate exhibits sufficient reactivity. Specifically, when the monomer component x2 is applied with heat, the blocking group (1'methylpropylideneamino group) is eliminated and the active isocyanate group is exposed. And an isocyanate group reacts with the hydroxyl group of another molecule | numerator, for example, and forms a urethane bond. On the other hand, the monomer component x2 is not reactive at a relatively low temperature because the isocyanate group is protected by the blocking group. 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.

  The content of the monomer component x2 in the polymer X is preferably 2 to 20 wt%, and more preferably 3 to 15 wt%. When the content rate of the monomer component x2 in the polymer X is a value within the above range, the above-described monomer component x1 and the monomer component x3 described in detail later are inhibited without inhibiting the function. Such an effect can be expressed more remarkably. 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 (3) as a monomer component.
By containing such a monomer component x3 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 suppress the occurrence of unintended irregularities on the surface of the colored portion to be formed.

  Moreover, the monomer component x3 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). Can increase the sex. In this way, in the colored portion 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 suitably advance the curing reaction (polymerization reaction) of the resin material.

  The content of the monomer component x3 in the polymer X is preferably 2 to 20 wt%, and more preferably 3 to 15 wt%. When the content of the monomer component x3 in the polymer X is a value within the above range, the above-described effects are more remarkably exhibited without inhibiting the functions of the monomer components x1 and x2. Can be made. 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.

  The weight average molecular weight of the polymer X is preferably 1000 to 50000, more preferably 1200 to 10000, and further preferably 1500 to 5000. Thereby, the heat resistance and solvent resistance of the formed colored portion can be made sufficiently high while preventing the fluidity of the color filter ink from being excessively lowered during the formation of the colored portion. In addition, the stability over time of the color filter ink of the polymer X (long-term storage stability) and the discharge stability of the color filter ink can be made particularly excellent, and the productivity of the color filter is sufficiently excellent. Therefore, it is possible to more effectively prevent the occurrence of color unevenness in an image displayed using a color filter.

Moreover, it is preferable that the dispersion degree (weight average molecular weight Mw / number average molecular weight Mn) of the polymer X is 1-3.
In addition, the content of the polymer X in the color filter ink is preferably 0.3 to 13.0 wt%, and more preferably 1.0 to 9.0 wt%. As a result, the color filter formed is excellent in solvent resistance while the discharge stability of the color filter ink droplets is particularly excellent.
As described above, in the present invention, the resin material contains the polymer X, but may further contain other resin components.

  Examples of such a resin component include polymer Y, polymer M, polymer W, and polymer Z as described below. These polymers can be cured by applying heat, and can contribute to the curing of colored portions and the improvement of heat resistance. In addition, these polymers are all cured by the hydrophthalic anhydride compound described above when heat is applied.

[Polymer Y]
The polymer Y includes a monomer component y1 represented by the following formula (8) and is, for example, a polymer represented by the following formula (9). The polymer Y may include a monomer other than the monomer component y1, may be substantially composed of a single compound, or may be a mixture of a plurality of types of compounds. Also good. However, when the polymer Y is a mixture of a plurality of types of compounds, each compound contains the monomer component y1.

The polymer Y can make especially the adhesiveness with respect to the board | substrate of the coloring part formed. In addition, since the polymer Y has a methoxysilyl group, the methoxysilyl group can react with a hydroxyl group of another polymer or the like, and the formed colored portion can have high hardness. As a result, the durability of the color filter manufactured using the color filter ink can be made particularly excellent.
Moreover, the polymer Y may contain monomer components other than the monomer component y1.

The weight average molecular weight of the polymer Y is preferably 1000 to 50000, more preferably 1200 to 10000, and further preferably 1500 to 5000. 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.
Moreover, it is preferable that the dispersion degree (weight average molecular weight Mw / number average molecular weight Mn) of the polymer Y is 1-3.

[Polymer M]
The polymer M includes a monomer component m1 represented by the following formula (10), a monomer component m2 having a carboxyl group or an acid anhydride group, and a monomer component m3 represented by the following formula (11): Is included.

The polymer M can uniformly disperse the colorant in the color filter ink, and can maintain the dispersed and dissolved state of the colorant for a long period of time. As a result, the color filter ink has a sufficiently low viscosity and excellent droplet ejection stability.
Also, if the liquid medium is removed at the time of forming the colored portion and the fluidity is lost at a relatively early stage, the unevenness due to the convection of the color filter ink that occurs along with the removal of the liquid medium is retained and formed. However, by including the polymer M, such a problem can be solved. This is because the color filter ink contains the polymer M, so that the polymer M can enter between the molecules and particles of the colorant to prevent the colorant from precipitating and aggregating. It is thought that the fluidity of In particular, when a pigment is used as a colorant, the polymer M enters between the pigment particles, prevents contact between the pigment particles, prevents aggregation of the pigment particles, and is liquid when forming a colored portion. Even when the medium is removed, the color filter ink is likely to maintain fluidity for a relatively long period of time.

  The polymer M is cured by applying heat, but has the “curing reaction switching characteristics” as described above. For this reason, the resin material is cured by heating to a predetermined temperature or higher when forming the colored portion. On the other hand, by storing the color filter ink at a predetermined temperature or less, the long-term storage stability of the color filter ink (the life of the color filter ink) becomes very excellent, and the mass production of the color filter ink is made. Occurrence of problems such as deterioration in quality due to placement can be effectively prevented, and the frequency of ink replacement for color filters can be reduced when manufacturing color filters. Therefore, productivity of color filters and reliability of manufactured color filters Can be made excellent.

In addition, by containing the polymer M, when the color filter ink is manufactured using a manufacturing method as described later (in a fine dispersion step described later), the aggregate of pigment particles used as a raw material can be easily made into fine particles. (Disintegration) and productivity of the color filter ink can be improved. In addition, since the polymer M has extremely excellent stability with respect to mechanical force, modification and deterioration in the fine dispersion step described later are prevented. Therefore, by using the polymer M, it is possible to efficiently prepare an ink for a color filter excellent in pigment dispersibility while reliably preventing deterioration of the resin material.
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 (10), 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 contain a plurality of monomer components m1 represented by the general formula (10) 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, solvent resistance, etc. Such deblocking does not proceed, and the progress of the curing reaction is prevented or suppressed.

In the monomer component m1 represented by the formula (10), R ¹ represents a hydrogen atom or a methyl group, and R ² represents a C 1-8 divalent aliphatic saturated hydrocarbon group. 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 (12) are more preferable.

Examples of the alkyl group having 1 to 8 carbon atoms in R ⁶ and R ⁷ in the formula (12) 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 (12) include 2- [O- (1'-methylpropylideneamino) carboxyamino] ethyl methacrylate (= 2- (1-methylpropylideneamino). (Oxycarbonylaminoethyl) methacrylate) (represented by the following formula (13)), 2- (3,5-dimethylpyrazol-1-yl) carbonylaminoethyl methacrylate (represented by the following formula (14)) ) And the like.

  Content of monomer component m1 in polymer M (value determined by conversion based on weight of monomer used for polymer synthesis; hereinafter, other monomer components (including other polymers) The same applies to the content ratio of.), Preferably from 1 to 99 wt% (for example, from 10 to 95 wt%), more preferably from 20 to 90 wt%, and even more preferably from 25 to 88 wt%. . 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. In addition, when the polymer M contains a plurality of types of monomer components m1, it is preferable that the sum of the contents of the plurality of types of monomer components m1 satisfies the above-described conditions. 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 at the content 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. Further, by containing the monomer component m2 as a monomer component, the uniformity of the colorant (particularly the dispersion stability of the pigment) and the long-term storage stability of the color filter ink can be made particularly 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 (represented by the following formula (15)) are particularly preferred.

  The content of the monomer component m2 in the polymer M is preferably 0.5 to 98 wt% (for example, 2.5 to 70 wt%), more preferably 3 to 50 wt%, and 5 to 40 wt%. % Is more preferable. When the content of the monomer component m2 in the polymer M is a value within the above range, the above-described monomer component m1, the monomer component m3 described in detail later, and the like are not hindered, and the above-described functions are prevented. The effect as described above can be expressed more remarkably. In addition, when the polymer M contains a plurality of types of monomer components m2, it is preferable that the sum of the content ratios of the plurality of types of monomer components m2 satisfies the above conditions. 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 (11) 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 (11) 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. Further, by containing the monomer component m3 as a monomer component in the polymer M, the uniformity of the colorant (especially the dispersion stability of the pigment) can be improved, and the color filter ink The storage stability (long-term storage stability) 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, for example, alkoxy groups such as methoxy and ethoxy groups (for example, alkoxy groups having 1 to 10 carbon atoms); phenoxy groups Aryloxy group such as cyclohexyloxy group, alicyclic hydrocarbon group-substituted oxy group such as cyclohexyloxy group, dicyclopentanyloxy group, etc .; carbon number 1-15 such as aralkyloxy group such as benzyloxy group (preferably carbon number 1 ˜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.

  The content of the monomer component m3 in the polymer M is preferably 0.5 to 98 wt% (for example, 2.5 to 70 wt%), more preferably 3 to 50 wt%, and 5 to 40 wt%. % Is more preferable. 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. In addition, when the polymer M contains a plurality of types of monomer components m3, it is preferable that the sum of the contents of the plurality of types of monomer components m3 satisfies the above-described conditions. 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 m1 [wt%]} ) , it is preferable to satisfy the following relationship. That is, C _m1 / C _m2 is preferably 2/98 to 98/2, more preferably 20/80 to 95/5, and still more preferably 40/60 to 95/5.
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 to 98/2, more preferably 20/80 to 95/5, and still more preferably 40/60 to 95/5.
Examples of the polymer M include those represented by the following formula (16).

  The excellent effects as described above are obtained when the color filter ink contains the polymer M containing the monomer components m1, m2, and m3, and the monomer components m1, m2, and m3 are obtained. 1 or two or more monomer components are not included, or monomer components m1, m2, and m3 are not included in a single molecule (for example, the color filter ink is polymer M In place of a polymer consisting only of the monomer component m1, a polymer consisting only of the monomer component m2, and a polymer consisting only of the monomer component m3). I can't get it.

  Moreover, the polymer M may contain 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 (17) 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. Moreover, a softness | flexibility can be provided to the colored part formed.
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, for example, alkoxy groups such as methoxy and ethoxy groups (for example, alkoxy groups having 1 to 10 carbon atoms); phenoxy groups Aryloxy group such as cyclohexyloxy group, alicyclic hydrocarbon group-substituted oxy group such as cyclohexyloxy group, dicyclopentanyloxy group, etc .; carbon number 1-15 such as aralkyloxy group such as benzyloxy group (preferably carbon number 1 ˜12) hydrocarbon group-substituted oxy groups 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 of the hydrocarbon group (which may have a hydrocarbon group-substituted oxy group) included in the monomer component m4 (hereinafter also referred to as the carbon number of R ⁹ ) 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 (18).

(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 unlikely 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, the uniformity of the colorant (particularly the dispersion stability of the pigment) can be made particularly excellent. Moreover, the hardening reaction of the resin material at the time of colored part formation can be advanced 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 a 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-epoxytricyclo [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. The 3- to 5-membered cyclic ether group mainly contributes to improvement of solvent 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 to 100,000, more preferably 1000 to 40000, and further preferably 2000 to 30000. Thereby, the contrast ratio and lightness of the color filter manufactured using the color filter ink 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. In addition, the productivity of the color filter ink can be made particularly excellent when a manufacturing method as described later is used.

Moreover, it is preferable that the dispersity (weight average molecular weight Mw / number average molecular weight Mn) of the polymer M is 1-3.
Further, the content of _{C M} of the polymer M in the color filter ink is preferably from 0.5～12Wt%, more preferably from 1.0~9.0wt%, 1.2~5 More preferably, it is 0.0 wt%. Thereby, the contrast ratio and lightness of the color filter manufactured using the color filter ink can be made particularly excellent. Further, the storage stability (long-term stability), ejection stability, hardness of the formed colored portion, solvent resistance, and the like can be improved.

[Polymer W]
The polymer W includes a monomer component w1 represented by the following formula (19), a monomer component w2 represented by the following formula (20), and a monomer component w3 represented by the following formula (21): And a monomer component w4 represented by the following formula (22). Examples of the polymer W include those represented by the following formula (23).

  The polymer W, like the polymer M, is a curable resin that cures when given heat, and is excellent in switching characteristics of the curing reaction. Further, like the polymer M, the polymer W has a function of uniformly dispersing and dissolving the colorant. In particular, when the colorant is a pigment, it prevents aggregation of the pigment particles, and the dispersion of the pigment. Stability can be made particularly excellent. In addition, since the polymer W is relatively stable with respect to mechanical force, when the color filter ink is manufactured using a manufacturing method as described later (in a fine dispersion step described later), the raw material The aggregate of the pigment particles used as can be more easily finely divided (pulverized), and the productivity of the color filter ink can be further improved.

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.
The polymer W may contain monomers other than the monomer components w1, w2, w3, and w4 as described above, but does not contain the monomer component m3.

(Monomer component w1)
The polymer W contains the monomer component w1 represented by the above formula (19) 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 characteristic of the curing reaction for the resin material can be made excellent. Further, by containing the monomer component w1 as a monomer component, the uniformity of the colorant in the color filter ink (particularly the dispersion stability of the pigment) can be made particularly excellent, and the color filter The long-term storage stability and ejection stability of the ink for use 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. For this reason, even if it is a case where it uses for the fine dispersion process mentioned later with a pigment, modification | denaturation and deterioration of the polymer W in this process are prevented, and the function of the polymer W is reliably demonstrated in the ink for color filters. be able to. Moreover, the hardness etc. of the colored part formed can be made excellent by containing the monomer component w1 as a monomer component.

  The content of the monomer component w1 in the polymer W is preferably 25 to 75 wt%, and more preferably 40 to 60 wt%. 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. 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 (20) as a monomer component.
By containing 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. Further, by containing the monomer component w2 as a monomer component, the dispersion stability of the dispersant can be made particularly excellent. As a result, when the colorant is a pigment, the dispersion stability of the pigment can be improved. And long-term storage stability of the color filter ink can be particularly improved.

  The content of the monomer component w2 in the polymer W is preferably 2 to 25 wt%, and more preferably 5 to 15 wt%. 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. 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 rate described above.

(Monomer component w3)
The polymer W contains the monomer component w3 represented by the formula (21) as a monomer component.
By including the monomer component w3 as the monomer component, the solvent resistance, solvent resistance, and the like of the formed colored portion 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 is sufficiently low in the polymer (polymer W) at a relatively low temperature (for example, 100 ° C. or less), 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, the uniformity of the colorant (especially the dispersion stability of the pigment) in the color filter ink can be made particularly excellent. The long-term storability and ejection stability of the ink for use can be improved.

  The content of the monomer component w3 in the polymer W is preferably 5 to 50 wt%, and more preferably 10 to 40 wt%. 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, w2 and the monomer component w4 described in detail later, The effects as described above can be expressed more remarkably. 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 (22) 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 is preferably 3 to 40 wt%, and more preferably 5 to 30 wt%. 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. 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 with the content as described above.

The weight average molecular weight of the polymer W is preferably 5000 to 50000, and more preferably 6000 to 15000. 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 or the like 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 W is 1-3.

[Polymer Z]
The polymer Z includes a monomer component z1 represented by the following formula (24), a monomer component z2 represented by the following formula (25), and a monomer component z3 represented by the following formula (26): Is included. Examples of the polymer Z include those represented by the following formula (27).

  The polymer Z, like the polymer M, is a curable resin that cures when given heat, and is excellent in switching characteristics of the curing reaction. Further, like the polymer M, the polymer Z has a function of uniformly dispersing and dissolving the colorant. In particular, when the colorant is a pigment, the polymer Z prevents aggregation of the pigment particles and disperses the pigment. Stability can be made particularly excellent. In addition, since the polymer Z is relatively stable with respect to mechanical force, when the color filter ink is manufactured using a manufacturing method as described later (in a fine dispersion step described later), the raw material The aggregate of the pigment particles used as can be more easily made into fine particles (pulverized), and the productivity of the color filter ink can be further improved.

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.
The polymer Z may contain monomers other than the monomer components z1, z2, and z3 as described above, but does not contain the monomer component m3.

(Monomer component z1)
The polymer Z contains the monomer component z1 represented by the formula (24) 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 characteristic of the curing reaction for the resin material can be made excellent. Further, by containing the monomer component z1 as the monomer component, the uniformity of the colorant in the color filter ink (particularly the dispersion stability of the pigment) can be made particularly excellent, and the color filter The long-term storage stability and ejection stability of the ink for use 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. For this reason, even when it is subjected to the fine dispersion step described later together with the pigment, the modification and deterioration of the polymer Z in this step are prevented, and the function of the polymer Z is reliably exhibited in the color filter ink. be able to. Moreover, the hardness etc. of the colored part formed can be made excellent by containing the monomer component z1 as a monomer component.

  The content of the monomer component z1 in the polymer Z is preferably 50 to 95 wt%, and more preferably 60 to 85 wt%. 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. 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 formula (25) 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 can be reliably prevented, A colored portion having excellent adhesion to the substrate can be suitably formed. Further, by containing the monomer component z2 as a monomer component, the dispersion stability of the dispersant as described above can be made particularly excellent. As a result, when a pigment is used as a colorant, The dispersion stability of the pigment 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 is preferably 3 to 35 wt%, and more preferably 10 to 25 wt%. 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 inhibited. Such an effect can be expressed more remarkably. Further, 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 above-described content.

(Monomer component z3)
The polymer Z contains the monomer component z3 represented by the above formula (26) as a monomer component.
Such a monomer component z3 is a component that contributes to the curing of the resin material in the colored portion forming step (curing step) described later, like the monomer component x1 described above. Whereas x1 has a function of increasing the hardness of the colored portion to be formed, the monomer component z3 gives an appropriate flexibility to the formed colored portion, and the colored portion is provided. Even when the substrate or the like is deformed (for example, thermal expansion or thermal contraction), it has a function of following the deformation and maintaining the adhesion of the colored portion to the substrate or the like. Thereby, 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 less) 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 formed colored portion.

  The content of the monomer component z3 in the polymer Z is preferably 2 to 30 wt%, and more preferably 5 to 20 wt%. 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. Further, 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 to 50000, and more preferably 6000 to 15000. 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 Z is 1-3.
In addition, each polymer mentioned above should finally have a structure as described above (each partial structure corresponding to each monomer component), and is synthesized using each monomer component described above. It may be synthesized, or may be synthesized using a component (precursor, derivative, etc.) different from the monomer component described above.

In addition, the content of the resin material in the color filter ink is preferably 0.5 to 18 wt%, more preferably 1 to 15 wt%, and further preferably 3 to 10 wt%.
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 produced color filter can be improved, and sufficient contrast is ensured even when the thickness of the colored part is made thinner. can do.
The resin material constituting the color filter ink may include a resin component other than those described above or a precursor thereof.

<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, 22, 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, 58; 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. And CI pigment blacks 1 and 7 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 green 58, C.I. I. Pigment blue 15: 6, C.I. I. Pigment violet 23, C.I. I. It is preferable to include one or more selected from the group consisting of CI Pigment Yellow 150 and derivatives thereof. Thereby, the color reproduction range and light resistance of the manufactured 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. Further, the dispersion stability of the pigment particles in the color filter ink can be made excellent. As a result, the fluidity of the color filter ink at the time of forming the colored portion can be maintained for a long time, and the discharge stability of the color filter ink can be made particularly excellent when the ink is applied to the cells.
C. I. Pigment Red 177 derivatives, C.I. I. When the pigment red 254 derivative contains a compound (derivative) represented by the following formula (28) or the following formula (29), the above-described effects are more remarkably exhibited.

  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, C.I. I. Even when the pigment green 58 is included, the dispersion stability in the color filter ink can be improved by using it together with the polymer X as described above. In addition, the color developability of the color filter ink can be further improved, and the decrease in the fluidity of the color filter ink due to the high concentration of the pigment during the formation of the colored portion 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 made particularly excellent.

  In addition, the present inventor I. It has been found that even 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 at the time of forming the colored portion, the decrease in the fluidity of the color filter ink due to the high concentration of the pigment can be more effectively achieved. 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, it is preferable that the sulfonated pigment derivative contains a compound (derivative) represented by the following formula (30). Thereby, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent, and an image with a better contrast can be displayed on the manufactured color filter.

  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 2 to 32 parts by weight, more preferably 7 to 28 parts by weight with respect to 100 parts by weight. Thereby, the dispersion stability of the pigment particles in the color filter ink can be made excellent. Further, the contrast ratio and brightness of the manufactured color filter 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.

  When the color filter ink is a pigment containing a pigment as a colorant (pigment ink), the average particle diameter of the pigment is preferably 10 to 200 nm, and more preferably 20 to 180 nm. As a result, the durability (light resistance) of the color filter manufactured using the color filter ink while sufficiently improving the dispersion stability of the pigment in the color filter ink and the discharge stability of the color filter ink. Etc.) can be made sufficiently excellent, and the color developability, contrast, etc. in the color filter can be made 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 oranges 21, 23, and the like.
The content of the colorant in the color filter ink is preferably 2 to 25 wt%, and more preferably 3 to 20 wt%. When the colorant content is within the above range, a higher color density can be secured in a color filter manufactured using the color filter ink, and the color filter can be used for clearer image display. .

<Liquid medium>
The liquid medium (liquid medium) dissolves the resin material as described above and has a function of dispersing or dissolving the colorant as described above. That is, the liquid medium functions as a dispersion medium and a solvent. 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 ethylene glycol monobutyl ether, ethylene glycol monohexyl ether, ethylene glycol 2-ethylhexyl ether, ethylene glycol di-n-butylate, ethylene glycol monobutyl ether acetate, diethylene glycol monomethyl ether, diethylene glycol. Monoethyl ether, diethylene glycol mononormal butyl ether, diethylene glycol monohexyl ether, diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether, diethylene glycol diethyl ether, diethylene glycol methyl propyl ether, diethylene glycol ethyl propyl ether, diethylene glycol butyl Cyl ether, diethylene glycol butyl ethyl ether, diethylene glycol butyl propyl ether, diethylene glycol mono-2-ethylhexyl ether, diethylene glycol monoethyl ether acetate, diethylene glycol diacetate, diethylene glycol monobutyl ether acetate, diethylene glycol propyl ether acetate, triethylene glycol monomethyl ether, triethylene glycol mono Ethyl ether, triethylene glycol mononormal butyl ether, triethylene glycol dimethyl ether, triethylene glycol methyl ethyl ether, triethylene glycol methyl propyl ether, triethylene glycol ethyl propyl ether, triethylene glycol Trimethylbutyl ether, triethylene glycol butyl ethyl ether, triethylene glycol methyl ether acetate, triethylene glycol ethyl ether acetate, triethylene glycol propyl ether acetate, triethylene glycol butyl ether acetate, triethylene glycol diacetate, tetraethylene glycol dimethyl ether, polyethylene Glycol monomethyl ether, propylene glycol diacetate, dipropylene glycol monomethyl ether, dipropylene glycol mono n-propyl ether, dipropylene glycol mono n-butyl ether, dipropylene glycol dimethyl ether, dipropylene glycol monomethyl ether acetate, tripropylene glycol Rumonomethyl ether, tripropylene glycol mono n-butyl ether, 2- (2-methoxy-1-methylethoxy) -1-methylethyl acetate, 4-methyl-1,3-dioxolan-2-one, bis (2-butoxy) Ethyl) ether, dimethyl glutarate, 1,3-butylene glycol diacetate, 1,6-diacetoxyhexane, butoxypropanol, ethyl 3-ethoxypropionate, 3-methoxybutyl acetate, ethyl octoate, cyclohexyl acetate, succinic acid Dimethyl, diethyl succinate, ethylene glycol diacetate, 4-hydroxy-4-methyl-2-pentanone, 1-butoxy-2-propanol, 3-methoxy-n-butyl acetate, diacetin, butyl glycolate, N-methyl- 2-pylori Emissions, bis (2-propoxy-ethyl) ether, n- nonyl alcohol, butyl cellosolve acetate and the like, may be used alone or in combination of two or more selected from these.

  Among these, as the liquid medium, 1,3-butylene glycol diacetate, bis (2-butoxyethyl) ether, 2- (2-methoxy-1-methylethoxy) -1-methylethyl acetate and diethylene glycol monobutyl ether acetate It is preferable that 1 type or 2 types or more selected from the group which consists of this is included, and it is more preferable that diethylene glycol monobutyl ether acetate is included. As a result, the viscosity of the color filter ink can be lowered, and an increase in the viscosity of the color filter ink can be prevented even when the colored portion is formed. In addition, since the resin material such as the polymer X as described above can be suitably dissolved, even when a relatively large amount of the colorant, the resin material, etc. is included in the color filter ink, the color The change in the physical properties of the 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. Occurrence of flight bends in the process is more effectively suppressed. In addition, in the flushing process to periodically discharge a small amount of color filter ink to prevent nozzle clogging, the color filter ink in the vicinity of the nozzle can be prevented from being dried while the head is moving 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.

  The boiling point of the liquid medium under atmospheric pressure (1 atm) is preferably 160 to 300 ° C, more preferably 180 to 290 ° C, and further preferably 200 to 280 ° C. 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.

  Further, 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 to 98 wt%, more preferably 60 to 95 wt%, and even more preferably 65 to 93 wt%. When the content of the liquid medium is a value within the above range, the color filter manufactured has a particularly excellent dischargeability from the droplet discharge head, and a sufficient color density is secured in the manufactured color filter. can do.

  When the liquid medium is composed of a plurality of types of compounds, in addition to the main components constituting the liquid medium, a group consisting of diethylene glycol mononormal butyl ether, triethylene glycol mononormal butyl ether and ethyl 3-ethoxypropionate It is preferable that 1 type or 2 types or more selected from are included. By including such a compound (hereinafter also referred to as a subcomponent), the colored portion to be formed has less unevenness.

In particular, diethylene glycol mononormal butyl ether and triethylene glycol mononormal butyl ether have a relatively high boiling point and are easy to dissolve the above-described resin material (particularly, polymer X). In forming the colored portion, such a compound is removed relatively gently after most of the liquid medium as a main component is volatilized. On the other hand, since the subcomponent easily dissolves the resin material, it is easy to maintain the fluidity of the color filter ink when the colored portion is formed. As a result, convection of the color filter ink at the time of removing the subcomponent is prevented, high fluidity of the color filter ink is maintained, and the formed colored portion has less unevenness.
In addition, the content of the subcomponents as described above in the color filter ink is preferably 3.0 to 25 wt%, and more preferably 7.0 to 20 wt%.
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. The dispersant can contribute to, for example, improving the dispersibility of the pigment particles in the color filter ink. Thereby, for example, the ejection stability of ink droplets can be made particularly excellent.

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, DISPERBIC 111, DISPERBIC 112, DISPERBIC 116, DISPERBIC 140, DISPERBIC 142, DISPERBIC 160, DISPERBIC 161, DISPERBIC 162, DISPERBIC 163, DISPERBIC 164, DISPERBIC 166, DISPERBIC 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 includes, 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 it contains. Thereby, the effect by the acid value dispersing agent which exhibits the viscosity reduction effect which reduces the viscosity of the ink for color filters and the effect by the amine number dispersing agent which stabilizes the viscosity of the ink for color filters are compatible. As a result, the pigment dispersion stability in the color filter ink and the discharge stability of the color filter ink droplets 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 (manufactured by Ciba Specialty Co., Ltd.); (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 the acid value dispersant and the 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 preferably 5 to 370 KOHmg / g. It is more preferably 20 to 270 KOH mg / g, and further preferably 30 to 135 KOH mg / g. When the acid value of the acid value dispersant is within the above range, the dispersion stability of the pigment when used in combination with the amine value dispersant can be made particularly excellent, and it is also used in combination with the amine value dispersant. In this case, the effect of reducing and stabilizing the viscosity of the color filter ink can be obtained more remarkably. In addition, when a pigment is contained in the color filter ink, the dispersion stability of the pigment can be made particularly excellent. 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 preferably 5 to 200 KOHmg / g. It is more preferably 25 to 170 KOH mg / g, and further preferably 30 to 130 KOH mg / g. When the amine value of the amine value dispersant is within the above range, the dispersion stability of the pigment when used in combination with the acid value dispersant can be made particularly excellent. In this case, the effect of reducing and stabilizing the viscosity of the color filter ink can be obtained more remarkably. 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.
Moreover, you may use a dispersing agent other than the above as a dispersing agent.
The content of the dispersant in the color filter ink is preferably 0.5 to 15 wt%, and more preferably 0.5 to 8 wt%.

<Other ingredients>
The color filter ink of the present invention may contain components other than those described above. Examples of such components include various crosslinking agents; thermal acid generators such as diazonium salts, iodonium, sulfonium salts, phosphonium salts, selenium salts, oxonium salts, ammonium salts, onium salts such as benzothiazolium salts; Photoacid generators such as salts, iodonium salts, sulfonium salts, phosphonium salts, selenium salts, oxonium salts and ammonium salts; various polymerization initiators; surfactants; sensitizers; light stabilizers; light-emitting materials; Inhibitors; UV absorbers; Adhesion improvers; Various light stabilizers; Fillers such as glass and alumina; 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane , Adhesion promoters such as 3-mercaptopropyltrimethoxysilane; 2, -Antioxidants such as thiobis (4-methyl-6-tert-butylphenol), 2,6-di-tert-butylphenol; 2- (3-tert-butyl-5-methyl-2-hydroxyphenyl) -5 Examples include ultraviolet absorbers such as chlorobenzotriazole and alkoxybenzophenone; anti-aggregation agents such as sodium polyacrylate.

  The leveling agent smoothes the surface of the ink and lowers the colored portion by reducing the surface tension of the ink. For this reason, when the ink has a leveling agent, it acts synergistically with the effect of the above-described resin material that maintains fluidity with low viscosity over a long period of time, and the surface of the ink in the cell becomes flatter. For this reason, the colored part to be formed becomes flatter.

  Examples of such leveling agents include acrylic leveling agents, vinyl ether leveling agents, silicone leveling agents, fluorine-silicon leveling agents, acetylene glycol leveling agents, and the like. Can be used in combination. 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) 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, and 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 and 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 (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 surfactants, it is preferable to use one or a combination of two or more selected from acrylic leveling agents, vinyl ether leveling agents, and acetylene glycol leveling agents. In particular, it is preferable to use one or more selected from Surfinol 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 in 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. 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 hinder amine 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 is suitably formed while effectively preventing the color filter ink and the colored portion from being deteriorated, hardly affecting the dispersibility and solubility of the colorant in the color filter ink. In the colored portion, the optical properties such as color, brightness, and contrast ratio are hardly 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 viscosity of the color filter ink at 25 ° C. (viscosity measured using a vibration viscometer) is not particularly limited, but is preferably 4 to 10 mPa · s, and preferably 5 to 9.5 mPa · s. Is more preferable. When the viscosity of the color filter ink is within the above-mentioned range, in the droplet discharge by the ink jet method as described later, the droplet discharge is performed while the variation in the appropriate amount of the color filter ink discharged is particularly small. The occurrence of clogging in the head can be prevented more reliably. 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.

≪Method for producing color filter ink≫
Next, a preferred embodiment of the method for producing the color filter ink as described above, in particular, the method for producing the color filter ink containing a pigment as a colorant will be described.
The manufacturing method of this embodiment includes a preliminary dispersion step of stirring a mixture containing a dispersant and a solvent to obtain a dispersant dispersion in which the dispersant is dispersed in the solvent, and a pigment in the dispersant dispersion. Adding, adding inorganic beads in multiple stages, performing fine dispersion treatment to obtain a pigment dispersion, and mixing step of mixing the pigment dispersion with a material such as polymer X, hydrophthalic anhydride compound, etc. Have

<Preliminary dispersion process>
In the preliminary dispersion step, a dispersant dispersion in which the dispersant is dispersed in the solvent is prepared by stirring a mixture containing the dispersant and the solvent. Thereby, it can be set as the state which the association state of the dispersing agent was released. Incidentally, the acid value dispersant and the amine value dispersant described above originally have a property of being easily attracted to each other. However, as in this embodiment, the acid value dispersant and the amine value dispersant are used for fine dispersion (fine dispersion step) of the pigment. By performing the preliminary dispersion step in advance, the acid value dispersant and the amine value dispersant are brought into association with each other even when an acid value dispersant and an amine value dispersant are used as the dispersant on the surface of the pigment particles. Can be adhered uniformly and stably in a sufficiently undissolved state, and aggregation of dispersants and aggregation of pigment particles can be reliably prevented. As a result, a color filter finally obtained The dispersion stability of the pigment of the ink for use can be made particularly excellent.

  In the case where the color filter ink is prepared by the method of the present embodiment as containing at least one of the polymer M, the polymer W, and the polymer Z, in this step, the polymer M, the polymer W Alternatively, at least one of the polymers Z is preferably used. Accordingly, the presence of these polymers around pigment particles (pigment particles having a relatively large particle size that are not finely dispersed) added in the dispersant dispersion in the fine dispersion step described later, Contact between the pigment particles can be prevented, and aggregation of the pigment particles can be prevented. For this reason, re-aggregation of pigment particles once dispersed in the fine dispersion step can be prevented and the fine dispersion treatment can be efficiently performed, and the productivity of the color filter ink can be made particularly excellent. The long-term dispersion stability of the pigment particles (finely dispersed pigment fine particles) and the discharge stability of the droplets in the finally obtained color filter ink can be made particularly excellent. In particular, when the polymer M is used in this step, the above-described effect becomes more remarkable.

  It is also conceivable to add a relatively stable resin such as a thermoplastic resin to prevent aggregation of the pigment particles in place of the polymer as described above in the dispersant dispersion. However, when a thermoplastic resin is used, it is difficult for the colored portion formed by the color filter ink to have sufficient solvent resistance. In addition, when a normal thermosetting resin is used instead of the polymer as described above, the color filter ink has a high viscosity, and the droplet discharge stability is poor.

The content of the dispersing agent in the dispersing agent dispersion prepared in this step (when including a plurality of types of dispersing agents) is not particularly limited, but is preferably 10 to 40 wt%, More preferably, it is 12-32 wt%. When the content of the dispersant is a value within the above range, the effects as described above are more remarkably exhibited.
The content of the polymer M, the polymer W, and the polymer Z in the dispersant dispersion prepared in this step is not particularly limited, but the total content is 10%. It is preferably ˜40 wt%, more preferably 12 to 32 wt%. Thereby, the effects as described above are more remarkably exhibited.
Moreover, the content rate of the solvent in the dispersing agent dispersion liquid prepared at this process is although it does not specifically limit, It is preferable that it is 40-80 wt%, and it is more preferable that it is 53-75 wt%. When the content of the solvent is within the above range, the effects as described above are more remarkably exhibited.

  In addition, as a solvent, what has the same composition as the liquid medium which comprises the target color filter ink may be used, and the thing of a different composition may be used. In this step, when a solvent having a composition different from the liquid medium constituting the target color filter ink is used as the solvent, for example, in a later step, diluted with a predetermined liquid (solvent), By substituting the liquid (solvent) accompanied by decompression treatment, heat treatment, etc., the liquid medium having a desired composition can be obtained in the finally obtained color filter ink.

In this step, a dispersant dispersion is obtained by stirring the mixture of the above components using various stirrers.
Examples of the stirrer that can be used in this step include a uniaxial or biaxial mixer such as a disper mill.
Although the stirring processing time using a stirrer is not specifically limited, It is preferable that it is 1 to 30 minutes, and it is more preferable that it is 3 to 20 minutes.
Moreover, the rotation speed of the stirring blade which the stirrer has in this step is not particularly limited, but is preferably 500 to 4000 rpm, and more preferably 800 to 3000 rpm.

<Fine dispersion process>
Next, a pigment is added to the dispersant dispersion obtained in the above step, and inorganic beads are added in multiple stages to perform a fine dispersion treatment (a fine dispersion step).
Thus, in this embodiment, prior to adding the pigment, the preliminary dispersion step as described above is provided, and the inorganic beads are added in multiple stages in the step of finely dispersing the pigment (fine dispersion step). By adding inorganic beads in multiple stages in the fine dispersion step, the efficiency of atomization of the pigment can be improved, and the pigment particles in the color filter ink finally obtained are sufficiently small. can do. The color filter ink finally obtained in this way has excellent pigment dispersion stability and droplet ejection stability, and is used for the production of a color filter with very excellent contrast. Of things that can be.

  This step may be performed by adding inorganic beads in multiple stages, and may be performed by adding inorganic beads in three or more stages, but it is preferable to add inorganic beads in two stages. . Thereby, the long-term dispersion stability of the pigment particles in the finally obtained color filter ink can be made sufficiently excellent, and the productivity of the color filter ink can be made particularly excellent.

In the following description, a method of adding inorganic beads in two stages, that is, a first treatment using the first inorganic beads and a second treatment using the second inorganic beads in the fine dispersion step. The method of performing will be described representatively.
The inorganic beads (first inorganic beads, second inorganic beads) used in this step may be made of any material as long as they are made of an inorganic material. Examples include beads made of zirconia (for example, Toray ceram pulverized ball (trade name), manufactured by Toray Industries, Inc.).

[First processing]
In this step, first, a pigment is added to the dispersant dispersion prepared in the above-described preliminary dispersion step, and a first treatment is performed in which primary fine dispersion is performed using first inorganic beads having a predetermined particle size.
The first inorganic beads used in the first treatment are preferably those having a larger particle diameter than the second inorganic beads used in the second treatment.

The average particle diameter of the first inorganic beads is not particularly limited, but is preferably 0.5 to 3.0 mm, more preferably 0.5 to 2.0 mm, and 0.5 to 1.2 mm. More preferably. When the average particle size of the first inorganic beads is a value within the above range, the efficiency of pigment atomization (fine dispersion) as a whole fine dispersion step can be made particularly excellent.
The amount of the first inorganic beads used is not particularly limited, but is preferably 100 to 600 parts by weight and more preferably 200 to 500 parts by weight with respect to 100 parts by weight of the dispersant dispersion.
The amount of the pigment added to the dispersant dispersion is not particularly limited, but is preferably 12 parts by weight or more, and more preferably 18 to 35 parts by weight with respect to 100 parts by weight of the dispersant dispersion.

The first treatment can be performed by stirring using various stirrers in a state where the pigment and the first inorganic beads are added to the dispersant dispersion.
Examples of the stirrer that can be used in the first treatment include a media-type disperser such as a pearl mill, a uniaxial or biaxial mixer such as a disper mill, and the like.
The stirring time using the stirrer (processing time of the first processing) is not particularly limited, but is preferably 10 to 120 minutes, and more preferably 15 to 40 minutes.
Moreover, the rotation speed of the stirring blade which the stirrer has in the first treatment is not particularly limited, but is preferably 1000 to 5000 rpm, and more preferably 1200 to 3800 rpm.

[Second processing]
After performing the first treatment, the second treatment using the second inorganic beads is performed. Thereby, a pigment dispersion in which pigment particles are sufficiently finely dispersed is obtained.
The second treatment may be performed in a state including the first inorganic beads, but it is preferable to remove the first inorganic beads prior to the second treatment. The removal of the first inorganic beads can be easily and reliably performed by a method such as filtration.

It is preferable that the second inorganic beads used in the second treatment have a smaller particle diameter than the first inorganic beads used in the first treatment. Thereby, the pigment in the color filter ink finally obtained can be sufficiently atomized (finely dispersed).
The average particle diameter of the second inorganic beads is not particularly limited, but is preferably 0.03 to 0.3 mm, and more preferably 0.05 to 0.2 mm. When the average particle size of the second inorganic beads is a value within the above range, the efficiency of pigment atomization (fine dispersion) as a whole fine dispersion step can be made particularly excellent.
Although the usage-amount of a 2nd inorganic bead is not specifically limited, It is preferable that it is 100-600 weight part with respect to 100 weight part of dispersing agent dispersion liquid, and it is more preferable that it is 200-500 weight part.

The second treatment can be performed using various stirrers.
Examples of the stirrer that can be used in the second treatment include a media-type disperser such as a pearl mill, a uniaxial or biaxial mixer such as a disper mill, and the like.
The stirring time using the stirrer (second processing time) is not particularly limited, but is preferably 10 to 120 minutes, and more preferably 15 to 40 minutes.
Moreover, the rotation speed of the stirring blade which the stirrer in the second treatment has is not particularly limited, but is preferably 1000 to 5000 rpm, and more preferably 1200 to 3800 rpm.

In the above description, the case where fine dispersion processing is performed in two stages has been mainly described, but three or more stages of processing may be performed. In such a case, it is preferable that the inorganic beads used in the subsequent treatment have a smaller particle size than the inorganic beads used in the previous treatment. In other words, the average particle diameter of the inorganic beads (n-th inorganic beads) used in the n-th stage treatment is that of the inorganic beads ((n-1) inorganic beads) used in the (n-1) -stage treatment. The average particle size is preferably smaller.
In the fine dispersion step (for example, the first process and the second process), for example, a process such as dilution with a solvent may be performed as necessary.

<Mixing process>
The pigment dispersion obtained in the fine dispersion step as described above is mixed with materials such as polymer X and hydrophthalic anhydride compound (mixing step). Thereby, the ink for color filters is obtained.
This step is preferably performed in a state where the second inorganic beads used in the second treatment are removed. The removal of the second inorganic beads can be easily and reliably performed by a method such as filtration.

This step can be performed using various stirrers.
Examples of the stirrer that can be used in this step include a uniaxial or biaxial mixer such as a disper mill.
The stirring time using the stirrer (processing time in this step) is not particularly limited, but is preferably 1 to 60 minutes, more preferably 15 to 40 minutes.
Moreover, the rotation speed of the stirring blade which the stirrer has in this step is not particularly limited, but is preferably 1000 to 5000 rpm, and more preferably 1200 to 3800 rpm.

In this step, a liquid having a composition different from that of the solvent used in the step may be added. This makes it possible to reliably obtain a color filter ink having desired characteristics while suitably dispersing the dispersant in the preliminary dispersion step and finely dispersing the pigment particles in the fine dispersion step.
Moreover, in this process, you may remove at least one part of the solvent used at the said process prior to mixing or after mixing. The removal of the solvent can be performed, for example, by placing the target liquid in a reduced pressure atmosphere or heating.

<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). In forming the colored portions of the plurality of colors, a plurality of types of color filter inks of corresponding colors are used. That is, an ink set including a plurality of color filter inks is used for manufacturing a color filter. In the present invention, in the production of the color filter, the color filter ink as described above may be used as long as it can be used to form at least one colored portion, but it can be used to form colored portions of all colors. Is preferred.

  More specifically, the color filter ink set preferably includes a red ink containing a red pigment, a green ink containing a green pigment, and a blue ink containing a blue pigment. Thereby, the color gamut of the color filter manufactured using the color filter ink set can be made particularly wide. Further, in the color filter, the luminance balance between the respective colors can be easily adjusted, and an image with particularly excellent image quality can be suitably displayed.

"Color filter"
Next, an example of a color filter manufactured using the color filter ink (ink set) as described above will be described.
FIG. 1 is a cross-sectional view showing a preferred embodiment of the color filter of the present invention.
As shown in FIG. 1, 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 light transmittance, and has a function of holding the colored 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.
For this reason, the color filter 1 is excellent in solvent resistance and lightness, and the occurrence of uneven color and uneven density is suppressed, and the color filter 1 is highly reliable.

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. The specific thickness of the partition wall 13 is preferably 0.1 to 10 μm, and more preferably 0.5 to 3.5 μm. Thereby, the viewing angle characteristic in the image display apparatus and the electronic apparatus provided with the color filter 1 can be made excellent.

  The partition wall 13 may be composed of any material, but is preferably composed mainly of a curable resin material, for example. 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.
2 is a cross-sectional view showing a method for manufacturing a color filter, FIG. 3 is a perspective view showing a droplet discharge device used for manufacturing the color filter, and FIG. 4 is a droplet discharge means in the droplet discharge device shown in FIG. FIG. 5 is a diagram showing the bottom surface of the droplet ejection head in the droplet ejection device shown in FIG. 3, and FIG. 6 is a diagram showing the droplet ejection head in the droplet ejection device shown in FIG. It is a figure, (a) is a section perspective view, (b) is a sectional view.

  As shown in FIG. 2, in this embodiment, a substrate preparation step (1a) for preparing a substrate 11, a partition formation step (1b, 1c) for forming a partition 13 on the substrate 11, and a color filter by an ink jet method. An ink application step (1d) 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 and curing the resin material to form a solid colored portion 12 Part forming step (1e).

<Board preparation process>
First, the substrate 11 is prepared (1a). 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 walls of the substrate 11 is applied to almost the entire one surface of the substrate 11 to form the coating film 3 (1b). 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 to 150 ° C. and heating time: 30 to 600 seconds.

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 alkaline developer (1c). PEB can be performed, for example, under the conditions of heating temperature: 50 to 150 ° C., heating time: 30 to 600 seconds, and radiation irradiation intensity: 1 to 500 mJ / cm ² . Further, 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, 10 to 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 to 280 ° C. and heating time: 3 to 120 minutes.

<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 (1d).
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 discharged using a droplet discharge device as shown in FIGS.
As shown in FIG. 3, the droplet discharge device 100 used in this step is supplied with the color filter ink 2 from the tank 101 that holds the color filter ink 2, the tube 110, and the tube 110. A discharge scanning unit 102. The ejection scanning unit 102 includes a droplet ejection unit 103 having a plurality of droplet ejection heads (inkjet heads) 114 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. The stage 106 is configured so that the substrate 11 having the cells 14 to which the color filter ink 2 is to be applied 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. 4, the droplet discharge means 103 has 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. 5, 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 can be set as 50-90 micrometers. Here, the “nozzle pitch HXP in the X-axis direction of 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 the present embodiment, 90 nozzles 118 are aligned in the X-axis direction at regular intervals LNP in each of the nozzle row 116A and the nozzle row 116B. Although the specific value of LNP is not specifically limited, It can be set as 100-180 micrometers.
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. 5). 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, 160 nozzles 118 out of 180 nozzles 118 in the droplet discharge head 114 function as nozzles that discharge the color filter ink 2.

As shown in FIG. 4, 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 ejection heads 114 in one row and the droplet ejection 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 through the supply port 130 positioned between the pair of partition walls 122.

  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 that sandwich 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 nozzle plate 128 is provided with a base material made of stainless steel, a silica film provided to cover the base material and mainly made of a silica compound, and provided to cover the silica film. And a liquid repellent film that contains the liquid repellent film.
Further, the silica film has a function of closely attaching the liquid repellent film and the stainless steel base material, and also has a function of protecting the stainless steel base material.

The control means 112 (see FIG. 3) 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.

  Using the droplet discharge device 100 as described above, the color filter ink 2 corresponding to the colored portions 12 of the plurality of colors of the color filter 1 is applied to the cells 14. By using the apparatus as described above, the color filter ink 2 can be efficiently and selectively applied to the cells 14. In addition, as described above, the color filter ink 2 has excellent ejection stability, and even when droplets are ejected for a long period of time, the flight curve and the droplet ejection amount are low. Problems such as destabilization are extremely unlikely to occur. Accordingly, a plurality of types of inks used to form colored portions of different colors are mixed (mixed), or between a plurality of colored portions that are originally required to have the same color density. Problems such as variations in coloring density can be reliably prevented.

In the illustrated configuration, the droplet discharge device 100 has only one tank 101 for holding the color filter ink 2, a tube 110, etc., 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 by utilizing the thermal expansion of the material by the electrothermal conversion element.

<Colored part forming step (curing step)>
Next, the liquid medium is removed from the color filter ink 2 in the cell 14 and the resin material is cured to form a solid colored portion 12 (1e). Thereby, the color filter 1 is obtained.
This step is performed by heating. By performing this step by heating, the hydrophthalic anhydride compound can accelerate the curing of the resin material such as the polymer X. As a result, the solvent resistance and reliability of the color filter 1 can be made particularly excellent. Also, the productivity of the color filter 1 is improved. Moreover, the adhesiveness with respect to the board | substrate 11 of the coloring part 12 formed can be made especially excellent. Moreover, it can prevent reliably that a liquid medium remains in the colored part 12 formed.

The heating temperature in this step (the temperature of the heated substrate 11) is not particularly limited, but is preferably 100 to 280 ° C, and more preferably 110 to 250 ° C. Thereby, the resin material is suitably cured by the hydrophthalic anhydride compound while preventing the material material of the colored portion 12 from being unintentionally deteriorated or decomposed, and further, the liquid medium is suitably removed from the color filter ink 2. Can be removed.
Moreover, the heating time in this step is not particularly limited, but is preferably 30 to 190 minutes, and more preferably 40 to 130 minutes.

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 in a state in which the surface is flat. Further, by heating at a relatively low temperature, the hydrophthalic anhydride compound can be prevented from being activated, and an unintentional curing reaction of the resin material can be prevented.

  In the second heat treatment, the liquid medium that could not be removed by the first heat treatment can be completely removed. Moreover, by activating the hydrophthalic anhydride compound in this step, the resin material can be efficiently reacted to cure the color filter ink 2. In this case, the color filter ink 2 fixed in a flat state in the first heat treatment can be efficiently cured in the shape.

  As described above, in the case where 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 30 to It is preferable that it is 100 degreeC, and it is more preferable that it is 40-80 degreeC. Thereby, the liquid medium can be suitably removed from the color filter ink 2 while preventing the reaction of the resin material. Also, activation of the hydrophthalic anhydride compound is prevented.

Moreover, the time of the first heat treatment is not particularly limited, but is preferably 3 to 50 minutes, and more preferably 5 to 40 minutes.
Moreover, the processing temperature (temperature of the heated substrate 11) in the second heat treatment is not particularly limited, but is preferably 120 to 280 ° C, and more preferably 150 to 250 ° C. Thereby, the liquid medium which could not be removed by the first heat treatment can be completely removed. In this step, the color filter ink 2 can be cured by reacting a resin material (curable resin material). Further, the hydrophthalic anhydride compound is sufficiently activated, and the curing of the resin material can be promoted.
The time for the second heat treatment is not particularly limited, but is preferably 25 to 150 minutes, and more preferably 30 to 100 minutes.

Moreover, in this process, you may perform the process of irradiating an active energy ray or placing the board | substrate 11 to which the ink 2 for color filters was provided in a pressure-reduced environment, for example.
By irradiating the active energy rays, the curing reaction of the resin material can be efficiently advanced, or even when the heating temperature is relatively low, the curing reaction of the resin material can be reliably advanced, It is possible to obtain such an effect that the adverse effects on the substrate 11 and the like are more reliably prevented. 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.

  In addition, the liquid medium is reliably removed even when the heating temperature is relatively low by placing the substrate 11 to which the color filter ink 2 is applied in a reduced pressure environment (by applying a reduced pressure treatment). Thus, the occurrence of adverse effects on the substrate 11, the colored portion 12 to be formed, etc. can be prevented more reliably. Moreover, a colored part can be formed more efficiently by using a heat treatment and a decompression treatment in combination.

<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 surface side where the colored portion 12 of the color filter 1 is provided, a color filter 1 and a substrate 66. And a polarizing plate 67 provided on the side of the color filter 1 opposite to the surface facing the liquid crystal layer 62 (lower side in FIG. 7). And a polarizing plate 68 provided on the surface 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.

  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 color filter ink 2 (color filter ink set) of the present invention, the color filter 1 is excellent in heat resistance and solvent resistance. A decrease in the voltage holding ratio of the common electrode provided on the color filter is suppressed. For this reason, the liquid crystal display device 60 is highly reliable.

"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 showing the configuration of a mobile (or notebook) personal computer to which the electronic apparatus of the present invention is applied.
In this figure, a personal computer 1100 includes a main body portion 1104 having a keyboard 1102 and a display unit 1106. The display unit 1106 is supported by the main body portion 1104 so as to be rotatable via a hinge structure portion. Yes.
In the personal computer 1100, the display unit 1106 includes an image display device 1000.
FIG. 9 is a perspective view showing a configuration of a mobile phone (including PHS) to which the electronic apparatus of the present invention is applied.
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 showing the configuration of a digital still camera to which the electronic apparatus of the present invention is applied. In this figure, connection with an external device is also simply shown.
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 a display unit, and is configured to display based on an image pickup signal from a 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.

  The electronic device of the present invention includes, for example, a television (for example, a liquid crystal television), a video camera, a viewfinder type, a monitor in addition to the above-described personal computer (mobile personal computer), mobile phone, and digital still camera. 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, videophone, 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), fish finder, each Measuring instruments, gauges (e.g., gages for vehicles, aircraft, and ships), a flight simulator, various monitors, and a projection display such as a projector. In particular, televisions have a remarkable tendency to increase the size of display portions in recent years. However, in electronic devices having such a large display portion (for example, a display portion having a diagonal length of 80 cm or more), conventional color filter inks are used. When the color filter manufactured using the above is applied, problems such as uneven color and uneven density are particularly likely to occur. However, if the present invention is applied, such problems can be reliably prevented.

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 in a lump, and the resin Although it has been described that the material is cured, that is, the colored portion forming step (curing step) is performed only once, the ink application step and the colored portion forming step may be repeatedly performed corresponding to each color. Good.

  In addition, each unit constituting the color filter, the image display device, and the electronic device can be replaced with an arbitrary one that exhibits the same function, or another configuration can be added. For example, in the color filter of the present invention, a protective film that covers the colored portion may be provided on the surface 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 color filter ink of the present invention may be produced by any method, and may not be produced by the method described above.
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)
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 (solvent) 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 formula (1) x1: 180 parts by weight, the monomer component (compound) represented by the formula (2) x2: 15 parts by weight, the formula (3) A monomer component (compound) represented by: x3: 15 parts by weight, 2,2′-azobis (isobutyronitrile) (AIBN): 50 parts by weight dissolved in diethylene glycol monobutyl ether acetate: 200 parts by weight Was added dropwise over 5 hours using a dropping pump, and further aged for 4 hours. Then, it cooled to room temperature and obtained the polymer X1 as the polymer X containing the monomer components x1, x2, and x3 and represented by the said Formula (7).

(Synthesis Examples 2 to 5)
Synthesis Example 1 except that the ratio of monomer components constituting the polymer was changed as shown in Table 1 by changing the type of solvent (solvent) used in the synthesis of the polymer and the ratio of each component. The same operation was performed. As a result, four types of polymers (polymers X2 to X5) were obtained. Each monomer component was used in the synthesis so that the total amount was 300 parts by weight.

(Synthesis Examples 6-8)
Synthesis Example 1 except that the ratio of monomer components constituting the polymer was changed as shown in Table 1 by changing the type of solvent (solvent) used in the synthesis of the polymer and the ratio of each component. The same operation was performed. As a result, three types of polymers (polymers X′1 to X′3) were obtained. Each monomer component was used in the synthesis so that the total amount was 300 parts by weight.

(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 (solvent) 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) represented by the above formula (9) y1: 300 parts by weight, 2,2'-azobis (isobutyronitrile) (AIBN): 50 parts by weight, diethylene glycol monobutyl ether acetate: 200 parts by weight The solution dissolved in the part was dropped over 5 hours using a dropping pump, and further aged for 4 hours. Then, it cooled to room temperature and obtained the polymer Y1 represented by the said Formula (10) including the monomer component y1.

(Synthesis Example 10)
In a reaction vessel (flask) equipped with a stirrer, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer, 100 parts by weight of diethylene glycol monobutyl ether acetate as a solvent (solvent) was added 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 the dropping of the polymerization initiator, the temperature is maintained (aged) at the same temperature for 4 hours, and then cooled to room temperature, including the monomer components m1, m2, and m3 and represented by the above formula (16). A polymer M1 as a combined M was obtained.
(Synthesis Examples 11-16)
The same operation as in Synthesis Example 10 except that the solvent (solvent) used in the synthesis of the polymer, 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. Went. As a result, six types of polymers M (polymers M2 to M7) were obtained.

(Synthesis Example 17)
In a reaction vessel (flask) equipped with a stirrer, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer, 180 parts by weight of diethylene glycol monobutyl ether acetate as a solvent (solvent) was added and heated to 85 ° C. Subsequently, in the flask, monomer component (compound) w1: 188 parts by weight represented by the above formula (19), monomer component (compound) w2: 34 weights represented by the above formula (20) Part, monomer component (compound) w3 represented by the above formula (21): 74 parts by weight, monomer component (compound) w4 represented by the above formula (22): 74 parts by weight, as radical initiator A solution prepared 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 (23) including the monomer components w1, w2, w3, and w4.
(Synthesis Examples 18 and 19)
The same operation as in Synthesis Example 17 was performed except that the type of solvent (solvent) 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, two types of polymers W (polymers W2 and W3) 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 (solvent) was added and heated to 80 ° C. Subsequently, in the flask, the monomer component (compound) represented by the above formula (24) z1: 276 parts by weight, the monomer component (compound) represented by the above formula (25) 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 (27) including the monomer components z1, z2, and z3.
(Synthesis Example 21)
The same operation as in Synthesis Example 20 was performed except that the type of solvent (solvent) 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, a polymer Z2 was obtained.

In Table 1, the ratio of each monomer component which comprises each polymer synthesize | combined by the synthesis examples 1-21, and the weight average molecular weight Mw of each polymer were shown collectively. In Table 1, 2- [O- (1′-methylpropylideneamino) carboxyamino] ethyl methacrylate (= 2- (1-methylpropylideneaminooxycarbonylaminoethyl) methacrylate) is represented by “m1a”, The acid 2- (3,5-dimethylpyrazol-1-yl) carbonylaminoethyl is indicated by “m1b” and the acid 2- (3,5-dimethylpyrazol-1-yl) carbonylaminoethyl is indicated 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 by “m3d”, methyl methacrylate is indicated by “m4a”, Ethyl acid 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 is indicated by “m7”. In the table, “S” means a solvent (solvent), in particular, “S1” indicates diethylene glycol monobutyl ether acetate, and “S2” indicates 1,3-butylene glycol diacetate. , “S3” represents 2- (2-methoxy-1-methylethoxy) -1-methylethyl acetate, “S4” represents bis (2-butoxyethyl) ether, and “S5” represents octane. It means ethyl acid. The weight average molecular weight Mw of each polymer was determined by using a TPC-GEL G5000HXL / G4000HXL / G3000HXL / G2000HXL manufactured by Tosoh as a separation column using a GPC measuring apparatus (HLC-8120GPC manufactured by Tosoh), and a column temperature: 40 ° C. Solvent: Tetrahydrofuran, solvent concentration 0.5 wt%, filter: 0.2 μm, flow rate: 1 ml / min, converted using standard polystyrene, and molecular weight was determined. Moreover, as for the polymer synthesize | combined as mentioned above, all had dispersion degree (weight average molecular weight Mw / number average molecular weight Mn) in the range of 1-3.

[2] Preparation of color filter ink (color filter ink set) (Example 1)
Dispersic 111 as an acid value dispersant, Disperbic 166 as an amine value dispersant, polymer M1, and diethylene glycol monobutyl ether acetate as a liquid medium are put into a stirrer (uniaxial mixer) having an internal capacity of 400 cc. Then, the dispersion was performed by stirring with a disper mill for 10 minutes to obtain a dispersant dispersion (preliminary dispersion step). At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm.

Next, as described below, a fine dispersion step was performed in which a pigment was added to the dispersant dispersion obtained in the preliminary dispersion step, and inorganic beads were added in multiple stages for fine dispersion treatment.
First, a pigment was added to the obtained dispersant dispersion and stirred for 10 minutes. At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm. Examples of the pigment include C.I. I. Pigment Red 177 and a pigment derivative represented by the above formula (28); I. A mixture of Pigment Red 254 and the pigment derivative represented by the above formula (29) and a powder of a sulfonated pigment derivative having a chemical structure represented by the above formula (30) were used. At this time, the mixture was diluted with diethylene glycol monobutyl ether acetate as a liquid medium (dispersion medium) so that the pigment content in the mixture of the dispersant dispersion and the pigment was 16 wt%.
Next, inorganic beads having an average particle diameter of 0.8 mm (first inorganic beads, manufactured by Zirconia, “Toray ceramic pulverized ball” (trade name), manufactured by Toray Industries, Inc.) are added and stirred at room temperature for 30 minutes. First-stage distributed processing (first processing) was performed. At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm.

Next, the inorganic beads (first inorganic beads) are removed by filtration using a filter (“PALL HDCII Membrane Filter”, manufactured by PALL). Inorganic beads, manufactured by zirconia, “Toray ceramic pulverized ball” (trade name), manufactured by Toray Industries, Inc.) were added, and the mixture was further stirred for 30 minutes to perform the second stage dispersion treatment (second treatment). At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm. Moreover, it diluted with the diethylene glycol monobutyl ether acetate as a liquid medium (dispersion medium) so that the content rate of the pigment in the obtained pigment dispersion might be 13 wt% at this time.
Thereafter, the inorganic beads (second inorganic beads) were removed by filtration using a filter (“PALL HDCII Membrane Filter” (trade name), manufactured by PALL) to obtain a pigment dispersion.

  Next, to the pigment dispersion obtained as described above, the polymer X1 and the hydrophthalic anhydride compound represented by the above formula (4), a leveling agent (Surfinol DF58, manufactured by Nissin Chemical Industry Co., Ltd.) )), An antioxidant (TINUVIN 152, manufactured by Ciba Japan Co., Ltd.) and diethylene glycol monobutyl ether acetate and diethylene glycol mononormal butyl ether as a liquid medium were added and mixed (mixing step). This step was performed by putting each of the above materials into a stirrer (uniaxial mixer) having an internal capacity of 400 cc and stirring for 10 minutes with a disper mill. At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm. As a result, the intended red color filter ink (R ink) was obtained. The content ratio of the pigment of the obtained R ink was 7.7 wt%.

  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 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 of the G ink pigment include C.I. I. Pigment Green 58 and a sulfonated pigment derivative powder having the chemical structure represented by the above formula (31) were used, and the pigment content in the final G ink was 10.1 wt%. Examples of the B ink pigment include C.I. I. Pigment blue 15: 6 and C.I. I. Pigment Violet 23 was used, and the pigment content in the final B ink was 4.9 wt%.

(Examples 2 to 12)
A color filter ink (ink set) and a blank ink set were prepared in the same manner as in Example 1 except that the type and content of the color filter ink material were changed as shown in Tables 2 and 3. .
(Comparative Examples 1-4)
A color filter ink (ink set) was prepared in the same manner as in Example 1 except that the type and content of the color filter ink material were changed as shown in Table 3.
In each of the above Examples and Comparative Examples, the resin materials are all used in the preliminary dispersion step for the polymers M, W, Z, and R, and for the polymers X, X ′, and Y, Used in the mixing step.

  Tables 2 and 3 collectively show the types and contents of the components of the color filter ink in each of the above Examples and Comparative Examples. 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 (28) “PR177D”, C.I. I. Pigment Red 254 and a pigment derivative represented by the formula (29) “PR254D”, and a powder composed of the pigment derivative represented by the formula (30) is “SPD”, C.I. I. Pigment Green 58 is changed to “PG58”, C.I. I. Pigment Green 36 is “PG36”, 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”, the hydrophthalic anhydride compound represented by Formula (4) is “PH1”, the hydrophthalic anhydride compound represented by Formula (5) is “PH2”, and the hydrophthalic anhydride compound represented by Formula (6) is used. Phthalic anhydride compound "PH3", SPCN-17X (made by Showa Polymer Co., Ltd.) as thermoplastic resin is "R", Dispersic 111 (acid value: 50 KOHmg / g) is "DA1", Dispersic 166 (amine) Value: 115 KOHmg / g) is “DA4”, leveling agent (Surfinol DF58, manufactured by Nissin Chemical Industry Co., Ltd.) is “DF58”, and leveling agent (LHP-90, manufactured by Enomoto Kasei) is “L90”. The leveling agent (LHP-95, manufactured by Enomoto Kasei Co., Ltd.) is “L95”, and the leveling agent (LF-1970, manufactured by Enomoto Kasei Co., Ltd.) is “LF”. Ing agent (Olefin SPC, Nissin Chemical Industry Co., Ltd.) the "SPC", showed antioxidant (TINUVIN 152, manufactured by Ciba Japan Co., Ltd.) in the "T152". The liquid medium is shown in the same manner as in Table 1. Further, diethylene glycol mononormal butyl ether is “S6”, triethylene glycol mononormal butyl ether is “S7”, ethyl 3-ethoxypropionate is “S8”, dipropylene. Glycol dimethyl ether is indicated by “S9”, and 3-methoxybutyl acetate is indicated by “S10”.

The acid value of the dispersant was determined by a method based on DIN EN ISO 2114, and the amine value was determined by a method based on DIN 16945. Moreover, the viscosity was measured according to JIS Z8809 using a vibration viscometer.
In addition, C.I. used in each example and each comparative example. I. The content ratio of the pigment derivative represented by the formula (28) in the mixture of Pigment Red 177 and the pigment derivative represented by the formula (28) was 0.1 to 10 wt%. In addition, C.I. used in the above Examples and Comparative Examples. I. The content ratio of the pigment derivative represented by the formula (30) in the mixture of Pigment Red 254 and the pigment derivative represented by the formula (29) was 0.1 to 10 wt%.

[3] Evaluation of Color Filter Ink Using the color filter ink obtained in each of the above Examples and Comparative Examples, the following evaluation was performed.
[3.1] Evaluation of landing position accuracy Prepared are a liquid droplet ejection device as shown in FIGS. With the driving waveform of the piezo element optimized, for each ink, the center of each of the landed droplets for 2000 million (2,000,000) droplets ejected from a designated nozzle near the center of the droplet ejection head. An average value of the shift amount d from the center aiming position of the position was obtained and evaluated according to the following five-step criteria. As the average value of the shift amount d, the average value of the values obtained for the three color inks was employed. 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 amount d is less than 0.06 μm.
B: The average value of the shift amount d is 0.06 μm or more and less than 0.12 μm.
C: The average value of the shift amounts d is 0.12 μm or more and less than 0.15 μm.
D: The average value of the shift amounts d is 0.15 μm or more and less than 0.18 μm.
E: The average value of the shift amounts d is 0.18 μm or more.

[3.2] Stability evaluation of droplet discharge amount Droplet discharge device as shown in FIGS. 3 to 6 installed in a chamber (thermal chamber), and ink sets for color filters of the above-described embodiments and comparative examples Were prepared, and 2,000,000 droplets (2,000,000 droplets) were continuously discharged from each nozzle of the droplet discharge head for each ink in a state where the drive waveform of the piezoelectric element was optimized. 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 [Delta] W / W _T, it was used the average of the values obtained for the three colors of ink. 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 0.055.
B: The value of ΔW / _{W T} is less than 0.055 than 0.270.
C: The value of ΔW / _{W T} is less than 0.270 than 0.570.
D: The value of ΔW / _{W T} is less than 0.570 than 0.790.
E: The value of ΔW / _{W T} is 0.790 or more.

[3.3] Evaluation of intermittent ejection performance Prepared are a droplet ejection apparatus as shown in FIGS. 3 to 6 installed in a chamber (thermal chamber) and an ink set for a color filter of each of the above examples and comparative examples, With the driving waveform of the piezo element optimized, 200000 droplets (200000 droplets) are continuously discharged from each nozzle of the droplet discharge head for each ink, and then the droplets are discharged for 180 seconds. Interrupted (first sequence). Thereafter, similarly, the operation of continuously discharging the droplets and interrupting the discharge of the droplets were repeated. For the specified 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 ₅₀ [ng] of the droplets discharged in the 50th sequence And asked. Then, the ratio (| W ₁ −W ₅₀ | / W _T ) of the absolute value of the difference between W ₁ and W ₅₀ to the target discharge amount W _T [ng] of the droplet is obtained, and the following five criteria are used. ,evaluated. _{Incidentally,} | _{W 1} -W 50 | The / _{W T,} was used the average of the values obtained for the three colors of ink. | _W 1 _-W 50 | 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 50 | value of / _{W T} is less than 0.045.
_B: | _{W 1} -W 50 | values of / _{W T} is less than 0.045 0.120.
_C: | _{W 1} -W 50 | values of / _{W T} is less than 0.120 or 0.430.
_D: | _{W 1} -W 50 | values of / _{W T} is less than 0.430 or 0.680.
_E: | _{W 1} -W 50 | value of / _{W T} is 0.680 or more.

[3.4] Continuous Discharge Test Using the droplet discharge device as shown in FIGS. Each ink constituting the color filter ink set was discharged by continuously operating the droplet discharge device for 600 hours in an environment of 40 ° C. and RH.
The nozzle clogging rate ([(number of clogged nozzles) / (total number of nozzles)] × 100) obtained after continuous operation is found and the nozzles are clogged. As for No. 1, 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. As the value of the occurrence rate of nozzle clogging, the average value of the values obtained for the three color inks was adopted.

A: No nozzle clogging occurs.
B: The occurrence rate of nozzle clogging is less than 0.6% (excluding zero), and clogging can be eliminated by cleaning.
C: The occurrence rate of nozzle clogging is 0.6% or more and less than 1.0%, and clogging can be eliminated by cleaning.
D: The occurrence rate of nozzle clogging is 1.0% or more and less than 1.3%, and clogging can be eliminated by cleaning.
E: The occurrence rate of nozzle clogging is 1.3% or more, or clogging cannot be eliminated by cleaning.

[3.5] Viscosity Change The viscosity at 25 ° C .: η _A was measured for the color filter inks of the examples and comparative examples. Next, the color filter ink was left in an environment of 60 ° C. for 40 days. Then, with respect to the color filter ink after standing, the viscosity: η _B at 25 ° C. of the color filter ink was measured. Then, the viscosity of the color filter ink before and after being left was compared, and the change in viscosity was evaluated according to the following five-step criteria.
Moreover, the viscosity was measured according to JIS Z8809 using a vibration viscometer.

A: η _B / η _A ≦ 1.05
B: 1.05 <η _B / η _A ≦ 1.10
C: 1.10 <η _B / η _A ≦ 1.20
D: 1.20 <η _B / η _A ≦ 1.50
E: 1.50 <η _B / η _A
In addition, said evaluation was performed on the same conditions about each Example and each comparative example.

[4] Production of color filter A color filter was produced in the following manner using the color filter ink (ink set) prepared in each of the above Examples and Comparative Examples.
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, irradiation with radiation is performed through a photomask to perform post-exposure baking (PEB), followed by development using an alkali developer, and further by performing post-baking to separate the partition walls. Formed. 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. The post-bake treatment was performed under the conditions of heating temperature: 150 ° C. and heating time: 5 minutes. The formed partition wall had a thickness of 1.6 μm.

  Next, using a droplet discharge device as shown in FIGS. 3 to 6, color filter ink was discharged into a cell as a region surrounded by a 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.

Thereafter, heat treatment was performed on a hot plate at 80 ° C. for 20 minutes (first heat treatment).
Further, a colored portion of three colors (red (R), green (G), blue (B)) was formed by performing a heat treatment in an oven at 200 ° C. for 40 minutes (second heat treatment). Thereafter, washing with isopropyl alcohol was performed, and a color filter as shown in FIG. 1 was obtained.
Using the method as described above, 3000 color filters were produced using the color filter inks (ink sets) of each Example and each Comparative Example.

[5] Evaluation of color filter The following evaluation was performed using each color filter obtained as described above.
[5.1] Color unevenness and density unevenness Among the color filters manufactured using the color filter inks (ink sets) of the respective examples and comparative examples, the color filters manufactured for the 9000th sheet are respectively used. Then, a liquid crystal display device as shown in FIG. 7 was manufactured under the same conditions.
About the manufactured liquid crystal display devices of the respective Examples and Comparative Examples, in the dark room, the red single color display, the green single color display, the blue single color display, and the white single color display were visually observed, The occurrence of color unevenness and density unevenness (including light leakage) at the site was evaluated according to the following five-step 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.

[5.2] Evaluation of brightness The liquid crystal display devices of the above Examples and Comparative Examples manufactured in [5.1] were evaluated as shown below. The liquid crystal display device performs red single color display, green single color display, and blue single color display, and a chromaticity meter (manufactured by Minolta, CM-3700d, using a C light source as a light source) and three by the xyY color system. Stimulus values were determined, and the average of the Y values of the three colors of red light, green light, and blue light was used as the brightness Y of white light, and evaluated according to the following five-step criteria.

A: Brightness Y is 29.0 or more.
B: Brightness Y is 28.3 or more and less than 29.0.
C: Brightness Y is 27.7 or more and less than 28.3.
D: Brightness Y is 27.0 or more and less than 27.7.
E: Lightness Y is less than 27.0.

[6] Solvent resistance Using each color filter ink, a large number of test pieces (test plates) used for the following tests were prepared as follows.
First, each ink was applied onto a glass substrate having a thickness of 0.7 mm by spin coating. The amount of ink applied was set so that the dry film thickness was 2.0 μm.

Next, pre-baking was performed on a 90 ° C. hot plate for 10 minutes. Then, it post-baked by heating at 200 degreeC for 30 minute (s) in the clean oven, and the test piece (test board) which has a colored film was obtained.
Next, the test pieces of each color of each of the examples and comparative examples were measured using a spectrophotometer (MCPD3000, manufactured by Otsuka Electronics Co., Ltd.).
Next, these test pieces were immersed in a solvent at 60 ° C. for 15 minutes, and then colorimetry was similarly performed using a spectrophotometer (MCPD3000, manufactured by Otsuka Electronics Co., Ltd.).
From these results, the color difference before and after the immersion of the solvent (color difference ΔE in the Lab display system) was determined for each test piece, and evaluated according to the following three criteria.

A: Color difference (ΔE) is less than 3.0.
B: Color difference (ΔE) is 3.0 or more and less than 3.5.
C: Color difference (ΔE) is 3.5 or more.
As the solvent, γ-butyrolactone (γ-BL), isopropyl alcohol (IPA), N-methyl-2-pyrrolidone (NMP), 0.5N hydrochloric acid (HCl), 0.5N aqueous sodium hydroxide solution (NaOH) are used. It was.
These results are shown in Tables 4 and 5.

As is apparent from Tables 4 and 5, in the present invention, the manufactured color filter has a highly reliable solvent resistance and lightness with reduced density unevenness and color unevenness at each part. It was. In addition, the color filter ink of the present invention was excellent in droplet ejection stability.
On the other hand, in each comparative example, a satisfactory result was not obtained. Moreover, when the color filter was manufactured in the same manner as in [4], except that the color filter ink of Comparative Example 1 was heated in an oven at 250 ° C. for 60 minutes in the second heat treatment, the manufactured color filter was produced. Was excellent in solvent resistance but inferior in brightness.

  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 ... For color filters Ink 3 ... Coating film 60 ... Liquid crystal display device 61 ... Common electrode 62 ... Liquid crystal layer 63 and 64 ... Alignment film 65 ... Pixel electrode 66 ... Substrate (counter substrate) 67, 68 ... Polarizing plate 100 ... Droplet ejection device 101 ... Tank DESCRIPTION OF SYMBOLS 102 ... Discharge scanning part 103 ... Droplet discharge means 104 ... 1st position control apparatus (moving means) 105 ... Carriage 106 ... Stage 108 ... 2nd position control apparatus (moving means) 110 ... Tube 112 ... Control means 114 ... Droplet Discharge head (inkjet head) 116A, 116B ... Nozzle array 118 ... Nozzle 120 ... Cavity 122 ... Partition 1 24 ... vibrator 124A, 124B ... electrode 124C ... piezo element 126 ... vibration plate 127 ... ejection part 128 ... nozzle plate 129 ... liquid pool 130 ... supply port 131 ... hole 1000 ... image display device 1100 ... personal computer 1102 ... keyboard 1104 ... Main unit 1106 ... Display unit 1200 ... Mobile phone 1202 ... Operation buttons 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 (10)

A color filter ink used in the production of an ink jet color filter,
A colorant;
A liquid medium in which the colorant is dispersed and / or dissolved;
Polymer X containing monomer component x1 represented by the following formula (1), monomer component x2 represented by the following formula (2), and monomer component x3 represented by the following formula (3) When,
A color filter ink comprising a hydrophthalic anhydride compound.

  The color filter ink according to claim 1, wherein the hydrophthalic anhydride compound is a tetrahydrophthalic anhydride compound. The color filter ink according to claim 1, wherein the hydrophthalic anhydride compound includes one or more selected from the group of compounds represented by the following formulas (4) to (6).

  4. The color filter ink according to claim 1, wherein the content of the hydrophthalic anhydride compound is 0.1 to 7.0 wt%. When the content of the polymer X in the color filter ink is C _X [wt%] and the content of the hydrophthalic anhydride compound in the color filter ink is C _PA [wt%], 0.01 ≦ C The color filter ink according to any one of claims 1 to 4, which satisfies a relationship of _PA / C _X ≤5.0.   The liquid medium includes 1,3-butylene glycol diacetate, bis (2-butoxyethyl) ether, 2- (2-methoxy-1-methylethoxy) -1-methylethyl acetate and diethylene glycol monobutyl ether acetate. The color filter ink according to claim 1, comprising one or more selected from the group consisting of:   A color filter manufactured using the color filter ink according to claim 1.   An image display device comprising the color filter according to claim 7.   The image display device according to claim 8, wherein the image display device is a liquid crystal panel.   An electronic apparatus comprising the image display device according to claim 8.

Images