JP2010197443A - Ink for color filter, color filter, image display device, and electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide ink for a color filter of an inkjet system which is suitably used for manufacture of the color filter having excellent contrast ratio and excellent luminosity, the color filter capable of displaying an image having a contrast ratio and excellent luminosity, an image display device provided with the color filter, and an electronic device. <P>SOLUTION: The ink for the color filter is used for manufacture of the color filter of the inkjet system, and the ink contains a pigment containing a zinc complex of halogenated phthalocyanine as a main pigment and a sulfonated pigment derivative as a sub pigment, a liquid medium in which the pigment is dispersed and a compound F represented by formula (1). In formula (1), a and b are each independently a natural number of one or more, and R<SB>1</SB>and R<SB>2</SB>are each independently a hydrogen atom or a methyl group. <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 (colored portion) of a color filter using an inkjet 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 also be suppressed.

  The color filter ink used in such a method for producing a color filter using an ink jet generally contains a colorant and a liquid medium (solvent) that dissolves and disperses the colorant. Since pigments generally have characteristics such as excellent light resistance compared to dyes, pigments are widely used as colorants in color filter inks. Further, in the manufacture of a color filter, usually three color inks (color filter inks) corresponding to the three primary colors of light (red, green, blue) are used.

By the way, in the case of green color filter inks, from the viewpoint of dispersibility and dispersion stability of pigment particles, C.I. I. Pigment Green 36 is widely used. However, C.I. I. When the pigment green 36 is used, it has been difficult to sufficiently meet the recent demand for higher brightness of the display image.
On the other hand, the inventor of the present invention uses a halogenated phthalocyanine zinc complex in the production of a color filter to obtain C.I. I. It has been found that a green colored portion having superior brightness, luminance, and contrast can be formed as compared with Pigment Green 36. However, the halogenated phthalocyanine zinc complex is inferior in dispersion stability in the ink, and the viscosity of the color filter ink tends to increase. For this reason, if droplets are ejected for a long period of time or droplets are ejected continuously, the trajectory of the ejected droplets changes (so-called flight bending occurs), and droplets are applied to the site for the purpose. In some cases, it may not be possible to land, or the discharge amount of droplets may become 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) on the substrate on which the 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, color gamut, etc.) among a large number of color filters result in low color filter reliability. In addition, when the pigment cannot be stably dispersed in the color filter ink, the pigment is likely to be present in an aggregated state in the formed colored portion. In such a case, the brightness and contrast ratio of the color filter are high. Don't be.

  In general, the colored portion is formed by removing the liquid medium (solvent) from the color filter ink and solidifying the color filter ink. However, conventional color filter inks containing a halogenated phthalocyanine zinc complex have a relatively high viscosity and low fluidity, so that they are solidified and colored while maintaining the irregularities that occur when removing the liquid medium. Part. When the colored portion thus formed has irregularities and does not become flat, there is a problem that the contrast ratio and brightness of the manufactured color filter are not sufficiently increased.

JP 2008-225124 A

  An object of the present invention is to provide a color filter capable of displaying an image with excellent contrast ratio and brightness, suppressing uneven density and uneven color at each part, and excellent in uniformity of characteristics among individuals. And providing an ink for an ink-jet color filter that can be suitably used in the production of the color filter, has excellent ejection stability and excellent pigment dispersion stability, and includes the color filter. An object is to provide an image display device and an electronic device.

これにより、コントラスト比、明度に優れた画像を表示することができ、各部位での濃度むら、色むらが抑制され、かつ個体間での特性の均一性に優れたカラーフィルターの製造に好適に用いることができる、吐出安定性に優れるとともに顔料の分散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 pigment comprising a halogenated phthalocyanine zinc complex as a primary pigment and a sulfonated pigment derivative as a secondary pigment;
A liquid medium in which the pigment is dispersed;
And a compound F represented by the following formula (1).

This makes it possible to display an image with excellent contrast ratio and brightness, suitable for the manufacture of a color filter that suppresses uneven density and uneven color at each part, and has excellent uniformity of characteristics among individuals. An ink for an ink-jet color filter that is excellent in ejection stability and excellent in pigment dispersion stability can be provided.

In the color filter ink of the present invention, the pigment derivative preferably has a chemical structure represented by the following formula (2).

  Thereby, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent. For this reason, the viscosity of the color filter ink can be made sufficiently low, and the discharge stability of the color filter ink can be made excellent. In addition, when the pigment particles are stably dispersed, the contrast ratio and brightness of the color filter to be formed can be made particularly excellent.

In the color filter ink of the present invention, it is preferable that the content of the sub-pigment is 10 to 80 parts by weight with respect to 100 parts by weight of the main pigment.
As a result, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent, the content of the main pigment can be made sufficient, and the desired color tone can be expressed. can do.

In the color filter ink of the present invention, the content of the sub-pigment is preferably 4 to 30 parts by weight with respect to 100 parts by weight of the compound F.
Thereby, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent.
In the color filter ink of the present invention, the compound F preferably has an alkylene glycol chain.
Thereby, since the compound F can have a high degree of freedom in its molecular structure (easy to be deformed within the molecule), the viscosity of the color filter ink can be lowered, and the color filter ink liquid can be reduced. Drop ejection properties can be made particularly excellent. Moreover, the fluidity of the color filter ink when forming the colored portion can be made higher.

In the color filter ink of the present invention, the compound F preferably has a structure represented by the following formula (3).

  Thereby, since the compound F can have a high degree of freedom in its molecular structure (easy to be deformed within the molecule), the viscosity of the color filter ink can be lowered, and the color filter ink liquid can be reduced. Drop ejection properties can be made particularly excellent. Moreover, the fluidity of the color filter ink when forming the colored portion can be made higher. Moreover, the solvent resistance and heat resistance of the colored part to be formed can be made sufficiently high.

In the color filter ink of the present invention, the compound F preferably has a molecular weight of 184 to 492.
Accordingly, the compound F has a relatively low molecular weight, can move more freely in the color filter ink, and can have higher fluidity when forming the colored portion of the color filter ink.

これにより、形成される着色部は耐久性に優れたものとなり、着色部が劣化しにくいため、長期にわたって使用された場合でも着色部は優れたコントラスト比、明度等を維持できるものとなる。 In the color filter ink of the present invention, a monomer component x1 represented by the following formula (4), a monomer component x3 represented by the following formula (5), and a single amount represented by the following formula (6) It is preferable that the polymer X containing the body component x4 is included.

Thereby, the colored part to be formed is excellent in durability and the colored part is not easily deteriorated, so that the colored part can maintain an excellent contrast ratio, brightness, etc. even when used for a long time.

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

These compounds are low in viscosity, have little viscosity change due to temperature, and have high affinity for the compound F as described above. Therefore, the compound F can be suitably dissolved in the liquid medium, and the color filter ink has a sufficiently low viscosity, and is particularly excellent in droplet discharge stability.
In addition, even when a small amount of the liquid medium remains in the color filter ink when the colored portion is formed, the compound F is suitably dissolved in the liquid medium, and the color filter ink maintains fluidity. be able to. For this reason, the viscosity of the ink for color filters can be made low, and also the viscosity of the ink for color filters can be prevented from increasing even when the colored portion is formed. As a result, the colored portion is flat, and the color filter is particularly excellent in contrast ratio and brightness.
Further, since such a compound has an excellent affinity with the sulfonated pigment derivative described above, the dispersion stability of the halogenated phthalocyanine zinc complex to which the sulfonated pigment derivative is adhered in the color filter ink is excellent. be able to.

In the color filter ink of the present invention, the liquid medium further comprises diethylene glycol mononormal butyl ether, triethylene glycol mononormal butyl ether, ethyl 3-ethoxypropionate, dipropylene glycol dimethyl ether, and 3-methoxybutyl acetate. It is preferable that 1 type or 2 types or more selected from are included.
Thereby, at the time of forming the colored portion, the high fluidity of the color filter ink is maintained, the formed colored portion has less unevenness, and the color filter is particularly excellent in contrast ratio and brightness.

The color filter of the present invention is manufactured using the color filter ink of the present invention.
As a result, it is possible to display an image with excellent contrast ratio and brightness, to provide a color filter that suppresses uneven density and uneven color at each part, and has excellent uniformity of characteristics among individuals. it can.

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 an image display device that can display an image having excellent contrast ratio and brightness by suppressing uneven density and uneven color of the display unit.
The image display device of the present invention is preferably a liquid crystal panel.
As a result, it is possible to provide an image display device that can display an image having excellent contrast ratio and brightness by suppressing uneven density and uneven color of the display unit.
An electronic apparatus according to the present invention includes the image display device according to the present invention.
As a result, it is possible to provide an electronic device that can suppress uneven density and color unevenness of the display unit and display an image with excellent contrast ratio and brightness.

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 includes a pigment, a resin material, a liquid medium in which the pigment is dispersed, 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.

<Pigment>
The color filter ink of the present invention includes a halogenated phthalocyanine zinc complex (hereinafter, also simply referred to as “halogenated phthalocyanine complex”) as a main pigment, and a sulfonated pigment derivative (hereinafter referred to as “sub-pigment”). Simply referred to as “sulfonated pigment derivative”). The halogenated phthalocyanine zinc complex is a green pigment, and is usually used for a green color filter ink.

[Main pigment (Zinc complex of halogenated phthalocyanine)]
A zinc complex of halogenated phthalocyanine as a main pigment includes zinc as a central metal and halogenated phthalocyanine as a ligand. The halogenated phthalocyanine zinc complex is C.I. I. Pigment Green 7 and C.I. I. Compared to Pigment Green 36, the brightness is superior. For this reason, the color filter excellent in the brightness can be formed by using the ink for color filters containing the halogenated phthalocyanine zinc complex.

  The halogenated phthalocyanine is obtained by substituting at least a part of the hydrogen atoms of the benzene ring constituting the phthalocyanine with a halogen atom. The halogenated phthalocyanine may be any as long as it satisfies such conditions, but preferably has a chemical structure represented by the following formula (7). The zinc complex of halogenated phthalocyanine having such a structure is excellent in lightness and luminance, and also in color development.

The content of the zinc complex of halogenated phthalocyanine in the color filter ink is not particularly limited, but is preferably 2.8 to 10.7 wt%, more preferably 2.9 to 8.6 wt%. .
The zinc complex of halogenated phthalocyanine may be composed of a single compound or a mixture of a plurality of types of compounds.

[Sub-pigment]
As described above, in the present invention, the color filter ink contains a sulfonated pigment derivative as a sub-pigment in addition to a zinc complex (main pigment) of a halogenated phthalocyanine as a pigment.
Thus, the color filter ink contains a sulfonated pigment derivative together with a halogenated phthalocyanine zinc complex (main pigment) in the color filter ink (and further includes a curable resin material as described later). The dispersibility and dispersion stability of a halogenated phthalocyanine zinc complex (originally, a halogenated phthalocyanine zinc complex that is inferior in dispersibility and dispersion stability) can be made excellent in the ink for use. Thus, the viscosity of the color filter ink can be made sufficiently low by stably dispersing the halogenated phthalocyanine complex. Further, in the colored portion to be formed, the pigment can be present in a sufficiently dispersed state, and the colored portion is excellent in brightness and contrast ratio.

The sulfonated pigment derivative as an auxiliary pigment is obtained by subjecting a known pigment or a known pigment derivative to a sulfonation treatment.
Sulfonation is, for example, sulfonation of fuming sulfuric acid, concentrated sulfuric acid, a mixture of fuming sulfuric acid and concentrated sulfuric acid, a mixture of sulfuric acid and phosphorus pentoxide, chlorosulfonic acid, sodium bisulfite, a mixture of sulfuryl chloride and aluminum chloride, etc. It can be carried out by an aromatic substitution reaction using an agent. In the aromatic substitution reaction, the reaction system may be heated as necessary.

In the sulfonation treatment, a catalyst may be used as necessary. Examples of the catalyst that can be used include metal sulfate salts such as calcium sulfate, aluminum sulfate, and iron sulfate. By using a catalyst, for example, effects such as prevention / suppression of undesirable side reactions, relaxation of reaction conditions, and increase in reaction rate can be obtained.
Although the usage-amount of a catalyst is not specifically limited, It is preferable that it is 0.05-10 weight part with respect to 100 weight part of pigments which should be sulfonated.
In the sulfonation treatment, ethylene glycol, propylene glycol, chloroform, ethylene chloride, carbon tetrachloride or the like may be used in the reaction system as necessary in order to control (suppress) the reaction rate.

  After completion of the sulfonation reaction, the sulfonated pigment derivative can be precipitated by pouring the reaction mixture into a large excess of water relative to the sulfonating agent used. The sulfonated pigment derivative is separated by filtration, washed with dilute acid such as dilute hydrochloric acid, washed with water and dried to obtain the desired sulfonated pigment derivative. When a volatile solvent that is insoluble in water, such as chloroform, ethylene chloride, or carbon tetrachloride, is used, it is preferable to distill off the solvent prior to adding the reaction mixture to water.

  In the present invention, the sulfonic acid obtained as described above may be used as an auxiliary pigment (sulfonated pigment derivative) as it is, or a salt of the sulfonic acid may be used as an auxiliary pigment (sulfonated pigment derivative). . Examples of the compound or atom that forms a salt with the sulfonic acid include, for example, 1 to 3 metal atoms such as lithium, potassium, sodium, calcium, magnesium, strontium, and aluminum, monoalkylamines such as ethylamine and butylamine, and dimethylamine. And dialkylamines such as diethylamine, trialkylamines such as trimethylamine and triethylamine, monoethanolamines, organic amines such as alkanolamines such as diethanolamine and triethanolamine, and ammonia.

Among these, when the salt is an alkali metal salt, the salt becomes water-soluble, and the following effects are obtained. That is, after dissolving the salt in water, the water-insoluble impurities can be easily separated by simply filtering, and the sulfonated pigment derivative can be obtained with high purity.
In the present invention, the sub-pigment may be any sulfonated pigment derivative, but preferably has a chemical structure represented by the following formula (2).

  Thereby, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent. For this reason, the viscosity of the color filter ink can be made sufficiently low, and the discharge stability of the color filter ink can be made excellent. In addition, when the pigment particles are stably dispersed, the contrast ratio and brightness of the color filter to be formed can be made particularly excellent.

As described above, by using a sulfonated pigment derivative (sub-pigment) having a specific chemical structure together with a zinc complex (main pigment) of a halogenated phthalocyanine, the excellent effects as described above are obtained. It was discovered as a result of intensive research by the author, and the details of the mechanism are unknown, but it is thought to be due to the following reasons.
The halogenated phthalocyanine constituting the main pigment has a highly conjugated system as a whole molecule, and has a planar structure, which is stable in terms of energy. The halogenated phthalocyanine is arranged in a stable state in which the conjugated π-electrons possessed by each molecule overlap each other by arranging (parallel) the planar molecules. For this reason, the main pigment originally tends to aggregate and is difficult to stably disperse in the solvent.

  On the other hand, in the sulfonated pigment derivative as described above, the hydrogen atom bonded to the nitrogen atom in the formula (2) forms a hydrogen bond with the oxygen atom constituting the phthalimide structure. For this reason, the hydrogen atom bonded to the nitrogen atom in formula (2) is substantially bonded to the oxygen atom constituting the phthalimide structure together with the nitrogen atom constituting the quinoline structure. In the sulfonated pigment derivative as described above, a stable ring structure (7-membered ring structure) is formed by 7 atoms numbered 1 to 7 in the formula (2). By forming such a seven-membered ring structure, the plane due to the quinoline structure and the plane due to the phthalimide structure are in a non-parallel state.

  Thus, the plane of the quinoline structure and the plane of the phthalimide structure are non-parallel, so that the sulfonated pigment derivative having an appropriate affinity for the halogenated phthalocyanine becomes a molecule of the halogenated phthalocyanine zinc complex. As described above, the zinc complex of halogenated phthalocyanine that originally tends to aggregate can be made difficult to aggregate. Furthermore, since the sulfonated pigment derivative (sub-pigment) has a sulfo group in the molecule, it is excellent in dispersibility in a liquid medium and a resin material described later. The above is considered to act synergistically and obtain the excellent effects as described above.

  As described above, in the present invention, the sulfonated pigment derivative preferably has a chemical structure represented by the formula (2), but has a chemical structure represented by the following formula (8). It is particularly preferred. Thereby, the effects as described above are more remarkably exhibited. This is because the sulfonated pigment derivative, having a sulfo group, is highly halogenated while maintaining excellent affinity for resin materials and liquid media as described later. This is considered to be because the affinity for the main pigment is particularly excellent.

The content of the sulfonated pigment derivative in the color filter ink is not particularly limited, but is preferably 0.1 to 5.0 wt%, and more preferably 1.0 to 4.0 wt%.
Further, the content of the sub pigment (sulfonated pigment derivative) in the color filter ink is not particularly limited, but is preferably 10 to 80 parts by weight with respect to 100 parts by weight of the main pigment, and preferably 30 to 70 parts. More preferred are parts by weight. As a result, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent, the content of the main pigment can be made sufficient, and the desired color tone can be expressed. can do.

The content of the sub-pigment (sulfonated pigment derivative) in the color filter ink is preferably 30 to 2000 parts by weight and 200 to 1500 parts by weight with respect to 100 parts by weight of the compound F. Is more preferable. As a result, the dispersion stability of the halogenated phthalocyanine complex (main pigment) to which the sub-pigment adheres in the color filter ink can be made particularly excellent.
The sulfonated pigment derivative (sub-pigment) may be composed of a single compound or a mixture of a plurality of types of compounds.

[Other pigments]
In the present invention, the color filter ink may include a halogenated phthalocyanine zinc complex (main pigment) and a sulfonated pigment derivative (sub-pigment) as pigments, but other pigment components (others) May be included.
As other pigments, various organic pigments and various inorganic pigments can be used, but more specifically, they are classified as “Pigment” in the Color Index (CI; issued by The Society of Dyers and Colourists). Compounds, and more specifically, those with the following color index (CI) numbers can be mentioned. That is, as other pigments, for example, C.I. 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 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 violet 1, 3, 14, 16, 19, 23, 29, 32, 36, 38, 50; 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 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 Green 7, 36, 15, 17, 18, 19, 26, 50; C.I. I. Pigment Brown 7, 11, 23, 25, 33; I. Pigment Black 1 and 7 and derivatives thereof may be used, and one or more selected from these may be used in combination.
When other pigments are included, the content of other pigments in the color filter ink is not particularly limited, but is less than the content of the halogenated phthalocyanine zinc complex and the content of the sulfonated pigment derivative described above. Preferably there is.

  The content of the pigment (including the main pigment and the sub-pigment) in the color filter ink is preferably 2.0 to 25 wt% or more, more preferably 3.5 to 20 wt%, and 6.0 More preferably, it is ˜12.0. When the pigment content is a value within the above range, the dispersion stability of the pigment in the color filter ink can be made sufficiently excellent, and a higher color density can be achieved in the produced color filter. Can be secured.

  Conventionally, when pigment is contained at such a relatively high concentration, the ejection stability is particularly low, and when the ink droplets for color filter are ejected, the flight curve and the droplet ejection amount In particular, problems such as destabilization of the system were likely to occur. Also, in the past, particularly when a colored portion is formed by discharging droplets on a large substrate (for example, G5 or more), the occurrence of defective products due to variations in the discharge amount at each site in the surface becomes significant. There is a problem that the productivity of the color filter is remarkably lowered. On the other hand, in the present invention, even when the pigment is contained at a relatively high concentration, as described in detail later, it is possible to reliably prevent the occurrence of the above-described problems, and the manufactured color filter Thus, it is possible to reliably prevent the occurrence of color unevenness, density unevenness, etc., and variation in characteristics among individuals, and a color filter can be manufactured with excellent productivity. That is, when the color filter ink contains a relatively high concentration of pigment as described above, the effects of the present invention are more remarkably exhibited. In addition, the durability of the manufactured color filter can be made particularly excellent.

  The average particle diameter of the pigment particles in the color filter ink is not particularly limited, but is preferably 10 to 200 nm, and more preferably 20 to 180 nm. As a result, the light filter of the color filter manufactured using the color filter ink is sufficiently excellent in light resistance, and the pigment dispersion stability in the color filter ink, the contrast and brightness of the color filter are particularly excellent. Can be.

<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.

[Compound F]
In the present invention, the color filter ink contains a compound F represented by the following formula (1) as a resin material.
Compound F is a compound represented by the following formula (1). Compound F has a function of curing the colored portion by being applied with energy such as heat, and when most of the liquid medium is removed from the color filter ink, Has the function of maintaining fluidity.

  By the way, in general, the colored portion is formed by removing the liquid medium from the color filter ink applied in the cell and solidifying the color filter ink. In such a case, the solid content concentration of pigment, resin material, etc. in the color filter ink in the cell increases, and the viscosity of the color filter ink increases with the removal of the liquid medium. As described above, when the viscosity is high, the color filter ink loses fluidity and is easily solidified. In particular, when the halogenated phthalocyanine complex is used as a pigment, the increase in the viscosity of the color filter ink accompanying the removal of the liquid medium is significant.

  In addition, when the ink is dried by heating or vacuum drying, a phenomenon in which the ink is thermally convected (Benard cell phenomenon) occurs due to volatilization of the liquid medium from the outer surface of the ink in the cell. In addition, due to non-uniform heat distribution in the ink in the cell, volatilization of the liquid medium in the ink tends to occur from a specific part of the cell. For this reason, the color filter ink in the cell is difficult to have a uniform solid content when the inside of the cell is viewed in plan, and is likely to be uneven.

  As described above, when the viscosity of the color filter ink is increased and the convection of the ink in the cell or the volatilization of the liquid medium from a specific portion occurs, the color filter ink is compared with the progress of the removal of the liquid medium. At an early stage, the shape with irregularities loses fluidity and solidifies. As a result, when the conventional ink is used, the surface of the colored portion to be formed has many irregularities. Thus, when the colored part to be formed is not flat, there is a problem that the brightness and contrast ratio of the color filter are not high.

On the other hand, in the present invention, the color filter ink contains the compound F represented by the above formula (1) as a resin material. Compound F is liquid at normal temperature (25 ° C.) and itself has high fluidity. The compound F also has a function as a liquid medium for dispersing (or dissolving) pigments and other color filter ink components.
Compound F has a high affinity for the sulfonated pigment derivative as described above. Therefore, the halogenated phthalocyanine complex particles to which the sulfonated pigment derivative is adhered can be stably dispersed in the color filter ink containing the compound F.

As described above, when forming the colored portion, the color filter ink has a sufficiently low viscosity after most of the liquid medium has volatilized, and the fluidity of the color filter ink is maintained. Then, when the volatilization amount of the liquid medium is reduced and the convection of the color filter ink as described above is suppressed, the fluid color filter ink becomes flat in the cell and is cured in that shape. To do. For this reason, the colored part formed using the color filter ink of the present invention is flat with few irregularities.
As a result, the color filter formed using the color filter ink of the present invention is excellent in contrast ratio and brightness.
In addition, even when droplets are ejected, the viscosity of the color filter ink is low for the same reason, and the droplet ejection stability of the color filter ink is excellent.

  In the above formula (1), a may be a natural number, but is preferably 1 to 12, and more preferably 2 to 7. Thereby, the compound F is prevented from being entangled with other molecules, and the compound F is more easily deformed. As a result, the viscosity of the color filter ink can be lowered. In addition, when the colored portion is formed, it is possible to more reliably suppress a decrease in the fluidity of the color filter ink (an increase in viscosity).

  In the above formula (1), b may be a natural number, but is preferably 1 to 4, more preferably 1 or 2, and still more preferably 1. Thus, b becomes a relatively small value, so that the compound F is prevented from being entangled with other molecules, and the viscosity of the color filter ink can be lowered. Moreover, the solvent resistance and heat resistance of the colored part to be formed can be made sufficiently high. The expression of the excellent solvent resistance and heat resistance of such a colored portion is that b is a relatively small value, and as a result, the number of ether bonds in the compound F is reduced. As a result, the carbon-carbon bond in the compound F is reduced. This is thought to be due to the fact that the compound (polymer) derived from the compound F is less cut by heat, chemicals, etc. in the colored part.

  Compound F preferably has an alkylene glycol chain. Thereby, since the compound F can have a high degree of freedom in its molecular structure (easy to be deformed in the molecule), the viscosity of the color filter ink can be lowered, and the colored portion is formed. The fluidity of the color filter ink can be made higher. Further, when a compound having an alkylene glycol chain is used as the liquid medium, since the affinity between the compound F and the compound having an alkylene glycol chain is high, the viscosity of the color filter ink can be lowered. The droplet discharge property of the filter ink can be made particularly excellent.

Further, Compound F preferably has a straight chain and no branched chain except for a methacryloyl group. Thereby, since the compound F has a high degree of freedom in the molecular structure, the viscosity of the color filter ink can be lowered, and the fluidity of the color filter ink at the time of forming the colored portion is higher. It can be.
In particular, the compound F preferably has a structure represented by the following formula (3). Thereby, the compound F can make the colored part formed sufficiently high in solvent resistance and heat resistance, while increasing the degree of freedom of the molecular structure.

The molecular weight of the compound F is preferably 184 to 492, and more preferably 184 to 252. Accordingly, the compound F has a relatively low molecular weight, can move more freely in the color filter ink, and can have higher fluidity when forming the colored portion of the color filter ink.
In addition, as the molecular weight of the compound F, when the compound F is comprised with multiple types of compound, the weight average molecular weight of these multiple types of compounds can be used.

  Examples of the compound F include compounds represented by the following formulas (9) to (13). Among these, as the compound F, it is preferable to use a compound represented by the following formula (9). Thereby, the fluidity at the time of forming the colored portion of the color filter ink can be made particularly excellent by increasing the degree of freedom of the molecular structure of the compound F. Furthermore, when a liquid medium having a glycol chain is used, the affinity with the liquid medium can be made particularly excellent, and the droplet discharge stability of the color filter ink should be made particularly excellent. Can do.

The content of compound F in the color filter ink is preferably 0.1 to 8.0 wt%, and more preferably 0.3 to 6.0 wt%. Thereby, the fluidity at the time of forming the colored portion of the color filter ink can be made high, and the solvent resistance and heat resistance of the formed colored portion can be made sufficiently high.
As described above, in the present invention, the resin material contains the compound F, but may further contain other resin components.
Examples of such a resin component (polymer) include polymer X, polymer Y, polymer M, polymer W, and polymer Z as described below.

[Polymer X]
The polymer X includes a monomer component x1 represented by the following formula (4), a monomer component x2 represented by the following formula (5), and a monomer component x3 represented by the following formula (6): For example, it is represented by the following formula (14). 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 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 when heated or the like is applied, and exhibits excellent hardness, heat resistance, and solvent resistance.
Moreover, since the polymer X is a polymer of a monomer having methacrylic acid and the compound F is an acrylic ester compound or a methacrylic ester compound, the polymer X and the compound F have high affinity. For this reason, the color filter ink can obtain the following effects by including the polymer X and the compound F at the same time.

  As described above, the polymer X forms a three-dimensional network polymer by applying heat or the like. On the other hand, since the compound F has two methacryloyl groups in the molecule, it becomes a three-dimensional network polymer when cured. For this reason, the colored portion formed by curing in a state where the high-affinity polymer X and the compound F are mixed is composed of a polymer derived from the affinity compound F and a polymer derived from the polymer X. Are intertwined so as to fill the gaps between them, and are particularly excellent in solvent resistance, heat resistance and hardness. As a result, the manufactured color filter has excellent brightness, contrast ratio, etc. over a long period of time.

  Moreover, the polymer X can prevent volatilization of the compound F. When compound F is used alone as a precursor of the resin material, compound F is likely to volatilize by being heated at the time of forming the colored portion. However, by simultaneously using the compound F and the polymer X having a high affinity, volatilization of the compound F at the time of forming the colored portion can be prevented, and the formed colored portion can be made flatter.

  Further, when the polymer X is used alone as a resin material, the liquidity of the color filter ink tends to be low when most of the liquid medium is removed from the color filter ink. However, in the present invention, even when the polymer X is used as the resin material, the fluidity of the color filter ink is eliminated even when most of the liquid medium is removed from the color filter ink by including the compound F. Is maintained for a long time as high. This is because the compound F having a high affinity with the polymer X enters the gap between the molecular chains of the polymer X in the color filter ink and functions as a plasticizer and a fluidity improving auxiliary agent for the polymer X. Can be considered.

(Monomer component x1)
The polymer X contains the monomer component x1 represented by the above formula (4) 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 (5) as a monomer component.
By containing the monomer component x2 as the monomer component, the chemical resistance, solvent resistance, heat resistance, and the like of the colored portion to be formed can be improved. 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. 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 (6) 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 chemical resistance of the formed colored portion can be made sufficiently high while preventing the fluidity of the color filter ink from excessively decreasing 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 0.7 to 8.0 wt%.

Further, when the content of the polymer X in the color filter ink is C _X [wt%] and the content of the compound F in the color filter ink is C _F [wt%], 1.0 ≦ C _X It is preferable that the relationship of / C _F ≦ 5.0 is satisfied, and it is more preferable that the relationship of 1.2 ≦ C _X / C _F ≦ 4.0 is satisfied. As a result, the colored portion to be formed has less unevenness, is particularly excellent in brightness and contrast ratio, and is particularly excellent in hardness, solvent resistance, and heat resistance.

[Polymer Y]
The polymer Y includes a monomer component y1 represented by the following formula (15) and is, for example, a polymer represented by the following formula (16). The polymer Y may be substantially composed of a single compound or a mixture of a plurality of types of compounds. However, when the polymer Y is a mixture of a plurality of types of compounds, each compound contains the monomer component y1.

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 (17), a monomer component m2 having a carboxyl group or an acid anhydride group, and a monomer component m3 represented by the following formula (18): Is included.

  The polymer M can uniformly disperse the pigment in the color filter ink, and can maintain the dispersed state of the pigment over a long period of time. As a result, the color filter ink has a sufficiently low viscosity and excellent droplet ejection stability. It will be easy to keep. This is presumably because the polymer M can enter between the pigment particles to prevent contact between the pigment particles, and as a result, aggregation of the pigment particles is prevented.

  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 (17), 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 (17) 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 contributes to curing, and can improve the adhesion to the substrate, heat resistance, chemical resistance, etc. Such deblocking does not proceed, and the progress of the curing reaction is prevented or suppressed.

In the monomer component m1 represented by the formula (17), 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 (19) are more preferable.

Examples of the alkyl group having 1 to 8 carbon atoms for R ⁶ and R ⁷ in the formula (19) 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 (17) include 2- [O- (1'-methylpropylideneamino) carboxyamino] ethyl methacrylate (= 2- (1-methylpropylideneamino). (Oxycarbonylaminoethyl) methacrylate) (represented by the following formula (20)), 2- (3,5-dimethylpyrazol-1-yl) carbonylaminoethyl methacrylate (represented by the following formula (21)) ) 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 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 (22)) 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 (18) as a monomer component. The polymer M constituting the color filter ink may include a plurality of monomer components m3 represented by the general formula (18) 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 dispersion stability of the pigment can be improved, and the storage stability of the color filter ink (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 (23).

  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 (24) 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 (25).

(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 pigment dispersion stability can be particularly improved. Further, a curing reaction of the resin material at the time of forming the colored portion (in particular, in addition to the polymer M, includes at least one selected from the group consisting of a polymer X, a polymer Z, and a polymer W as described in detail later) The curing reaction of the resin material can be progressed more suitably.

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

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

Examples of the oxirane ring (epoxy group) -containing polymerizable unsaturated compound include oxiranyl (meth) acrylate, glycidyl (meth) acrylate, 2-methylglycidyl (meth) acrylate, 2-ethylglycidyl (meth) acrylate, 2-oxy Polymerizable unsaturated compounds containing an oxirane ring (monocyclic) such as ranylethyl (meth) acrylate, 2-glycidyloxyethyl (meth) acrylate, 3-glycidyloxypropyl (meth) acrylate, glycidyloxyphenyl (meth) acrylate, etc. ((Meth) acrylic acid ester derivatives and the like); 3,4-epoxycyclohexyl (meth) acrylate, 3,4-epoxycyclohexylmethyl (meth) acrylate, 2- (3,4-epoxycyclohexyl) ethyl (meth) acrylate, Epoxy group-containing alicyclic rings such as 3,4-epoxycyclohexane rings such as-(3,4-epoxycyclohexylmethyloxy) ethyl (meth) acrylate and 3- (3,4-epoxycyclohexylmethyloxy) propyl (meth) acrylate Polymerizable unsaturated compounds containing 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 chemical resistance (solvent resistance, alkali resistance, etc.).

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

The weight average molecular weight of the polymer M is preferably 500 to 100,000, more preferably 1000 to 40000, and further preferably 2000 to 30000. As a result, the contrast ratio and brightness of the color filter manufactured using the color filter ink can be made particularly excellent, and the durability of the color filter can be made particularly excellent. In addition, the storage stability (long-term stability), ejection stability, hardness of the formed colored portion, and the like 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.
The content _{C M} of the polymer M in the color filter ink is preferably from 0.5～12Wt%, and more preferably 1.0~9.0wt%.

[Polymer W]
The polymer W includes a monomer component w1 represented by the following formula (26), a monomer component w2 represented by the following formula (27), and a monomer component w3 represented by the following formula (28): And a monomer component w4 represented by the following formula (29). Examples of the polymer W include those represented by the following formula (30).

  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 can prevent aggregation of the pigment particles and can make the dispersion stability of the pigment 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 formula (26) 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 dispersion stability of the pigment particles in the color filter ink can be made particularly excellent, and the long-term storage stability of the color filter ink, The discharge stability can be made particularly excellent. In addition, the monomer component w1 is excellent in reactivity in a high-temperature environment in the polymer W, but has extremely excellent stability against mechanical force. 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 (27) 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 the monomer component, the dispersion stability of the dispersant can be made particularly excellent. The storage stability can be made particularly excellent.

  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 above formula (28) as a monomer component.
By including the monomer component w3 as the monomer component, the chemical resistance, solvent resistance, and the like of the colored portion to be formed can be made particularly excellent. Thus, after the colored portion forming step (curing step), chemical application and washing (especially washing with N-methyl-2-pyrrolidone, γ-butyrolactone, isopropyl alcohol, hydrochloric acid, aqueous sodium hydroxide, etc.), etc. Even when post-processing is performed, the occurrence of adverse effects due to these can be more reliably prevented.

In addition, the monomer component w3 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 the monomer component, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent, and the long-term storage stability of the color filter ink The discharge stability can be made excellent.

  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 (29) 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 (31), a monomer component z2 represented by the following formula (32), and a monomer component z3 represented by the following formula (33). Is included. Examples of the polymer Z include those represented by the following formula (34).

  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 can prevent the pigment particles from aggregating and can make the dispersion stability of the pigment 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 W 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 (31) 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 dispersion stability of the pigment particles in the color filter ink can be made particularly excellent, and the long-term storage stability of the color filter ink, The discharge stability can be made particularly excellent. In addition, the monomer component z1 in the polymer Z is excellent in reactivity under a high temperature environment, but has extremely excellent stability against mechanical force. 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 above formula (32) 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 the monomer component, the dispersion stability of the dispersant as described above can be made particularly excellent. As a result, the dispersion stability of the pigment, the color filter The long-term storage stability of the ink for use 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 (33) 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%.
Further, when the content of the resin material in the color filter ink is C _R [wt%] and the content of the pigment in the color filter ink is C _C [wt%], 0.2 ≦ C _R / C The relationship of _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 ≦ 3.5 It is more preferable to satisfy this relationship. 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. In addition, in the conventional color filter ink, when the content of the resin material relative to the content of the pigment is low, inconveniences such as unintentional irregularities on the surface of the formed colored portion are likely to occur, In the present invention, as described above, even when the content of the resin material with respect to the content of the pigment is low, it is possible to reliably prevent unintended irregularities from occurring on the surface of the formed colored portion. be able to. That is, by satisfying the relationship as described above, the effects of the present invention are more remarkably exhibited.
The resin material constituting the color filter ink may include a resin component other than those described above or a precursor thereof.

<Liquid medium>
The liquid medium (liquid medium) has a function of dispersing the pigment as described above. That is, the liquid medium functions as a dispersion medium. In general, most of the liquid medium is removed in the process of manufacturing the color filter.
As the liquid medium constituting the color filter ink, for example, ester compounds, ether compounds, hydroxy ketones, carbonic acid diesters, cyclic amide compounds and the like can be used. Among them, [1] polyhydric alcohols (for example, ethylene glycol) , Propylene glycol, butylene glycol, glycerin, etc.) condensates (polyhydric alcohol ethers), polyhydric alcohols or alkyl ethers of polyhydric alcohol ethers (eg, methyl ether, ethyl ether, butyl ether, hexyl ether, etc.) , Esters (eg, formate, acetate, propionate, etc.), [2] esters of polyvalent carboxylic acids (eg, succinic acid, glutaric acid, etc.) (eg, methyl esters), [3] at least one hydroxyl group in the molecule When Ether compounds having one carboxyl group even without (hydroxy acid), esters and the like, (4) polyhydric alcohol and carbonic acid diester having a chemical structure as obtained in the reaction with phosgene is preferred. Examples of the compound that can be used as the liquid medium include 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, and 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 them, the liquid medium is selected from the group consisting of 1,3-butylene glycol diacetate, ethylene glycol monobutyl ether acetate, 2- (2-methoxy-1-methylethoxy) -1-methylethyl acetate and diethylene glycol monobutyl ether acetate. It is preferable to include one or more selected, and more preferable to include 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 compound F as described above. Therefore, the compound F can be suitably dissolved in the liquid medium, and the viscosity of the color filter ink is sufficiently low. Further, even when a small amount of the liquid medium remains in the color filter ink when forming the colored portion, the compound F is suitably dissolved in the liquid medium, and the color filter ink maintains fluidity. be able to. Furthermore, since such a compound has excellent affinity with the sulfonated pigment derivative described above, the dispersion stability of the halogenated phthalocyanine complex to which the sulfonated pigment derivative is adhered in the color filter ink should be excellent. Can do. For this reason, the viscosity of the ink for color filters can be made low, and also the viscosity of the ink for color filters can be prevented from increasing even when the colored portion is formed. Even when a relatively large amount of pigment, resin material, or the like is contained in the color filter ink, the change in the physical properties of the color filter ink is relatively small. In addition, when the liquid medium is composed of the above-described compound, in the color filter manufacturing method as described later, the color filter ink is more reliably spread throughout the cell. Can do. In particular, when the compound F has an alkylene glycol chain, the affinity as described above having an alkylene glycol chain is particularly high, and thus the above-described effects become more remarkable.

  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 1,3-butylene glycol diacetate, the color filter ink becomes very difficult to dry in the vicinity of the nozzles, and the occurrence of flight bending in the ink application process is more effective. Is 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. Further, since the color filter ink is difficult to dry, deterioration, aggregation, and segregation of components such as pigments and resin materials 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 When one or more selected from the above are included, the following effects are obtained. These compounds have a relatively high boiling point and easily dissolve the resin material as described above (particularly compound F). Then, at the time of forming the colored portion, after most of the liquid medium serving as the main component is volatilized, such a compound (hereinafter also referred to as a subcomponent) is removed relatively gently. 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 contributes to the improvement of dispersibility of the pigment particles in the color filter ink by adhering to the surface of the pigment particles.
Examples of the dispersant include cationic, anionic, nonionic, amphoteric, silicone, and fluorine surfactants.

  More specific examples of the dispersant include, for example, Dispersic 101, Dispersic 102, Dispersic 103, Dispersic P104, Dispersic P104S, Dispersic 220S, Dispersic 106, Dispersic 108, Dispersic 109, Disperse Bic 110, Dispersic 111, Dispersic 112, Dispersic 116, Dispersic 140, Dispersic 142, Dispersic 160, Dispersic 161, Dispersic 162, Dispersic 163, Dispersic 164, Dispersic 166, Dispersic 167 Dispersic 168, Dispersic 170, Dispersic 171, Dispersic 1 4, Dispersic 180, Dispersic 182, Dispersic 183, Dispersic 184, Dispersic 185, Dispersic 2000, Dispersic 2001, Dispersic 2050, Dispersic 2070, Dispersic 2095, Dispersic 2150, Dispersic LPN6919, Dispersic 9075, Dispersic 9077 (above, manufactured by BYK Chemie); EFKA 4008, EFKA 4009, EFKA 4010, EFKA 4015, EFKA 4020, EFKA 4046, EFKA 4047, EFKA 4050, EFKA 4055, EFKA 4055, EFKA 4055 , EFKA 4401, EFKA 4402, EF A 4403, 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 32550, Sol Sparse 33500, Solsperse 35100, Solsperse 35200, Solsperse 36000, Solsperse 36600, Solsperse 38500, Solsperse 41000, Solsperse 41090, Solsperse 20000 (above, manufactured by Lubrizol); Manufactured by Ajinomoto 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.) And Florene DOPA-14, Florene DOPA-15B, Florene DOPA-17, Florene DOPA-22, Floren DOPA-44, Floren TG-710, Floren D-90 (manufactured by Kyoei Chemical Co., Ltd.), Anti-Terra-205 (Made by 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.) and the like are selected. These can be used alone or 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 dyes, various crosslinking agents; thermal acids such as diazonium salts, iodonium salts, sulfonium salts, phosphonium salts, selenium salts, oxonium salts, ammonium salts, and onium salts such as benzothiazolium salts. Generator: Photoacid generator such as diazonium salt, iodonium salt, sulfonium salt, phosphonium salt, selenium salt, oxonium salt, ammonium salt, etc .; various polymerization initiators; acid crosslinking agent; surfactant; sensitizer; Various dyes, luminescent materials, leveling agents, antioxidants, UV absorbers, adhesion improvers, various polymerization accelerators, various light stabilizers, fillers such as glass and alumina, vinyltrimethoxysilane, vinyltriethoxy Silane, vinyltris (2-methoxyethoxy) silane, N- (2-aminoethyl) -3-aminopropi Methyldimethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2 -(3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, etc. Agents; antioxidants such as 2,2-thiobis (4-methyl-6-t-butylphenol), 2,6-di-t-butylphenol; 2- (3-t-butyl-5-methyl-2-hydroxy) Phenyl) -5-chlorobenzotriazole, al Ultraviolet absorbers such as carboxymethyl benzophenone; anti-agglomeration agent such as sodium polyacrylate, and the like.

  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.

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

  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 type 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 -Silicane 3700 (above, manufactured by Big Chemie Japan), silicone leveling agents such as KP-321, KP-324 (above, manufactured by Shin-Etsu Chemical Co., Ltd.), Megafac 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 , F-486, F-487, F-489 (above, manufactured by Dainippon Ink & Chemicals, Inc.) 104, 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 CT131, Surfinol 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 , Olfin PD-004, Orphine 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 also prevent deterioration of the pigment or resin material due to heat, light, or the like in the colored portion formed by the color filter ink.
Antioxidants include various phosphorus antioxidants; various sulfur antioxidants; various hindered phenols such as IRGANOX 1010, IRGANOX 1035, IRGANOX 1076, IRGANOX 1135, IRGANOX 1520L (above, manufactured by Ciba Japan Co., Ltd.) Antioxidants: various hindered amine-based antioxidants such as TINUVIN 111FDL, TINUVIN 123, TINUVIN 144, TINUVIN 152, TINUVIN 292, TINUVIN 5100, TINUVIN 5050, TINUVIN 5060, TINUVIN 5151 (above, manufactured by Ciba Japan Co., Ltd.), etc. Various antioxidants can be used alone or in combination of two or more. Among these, it is preferable to use at least one of a hindered amine antioxidant and a hindered phenol antioxidant, more preferably a hindered phenol antioxidant, and even more preferably TINUVIN152. Such an antioxidant suitably prevents the color filter ink and the colored portion from deteriorating effectively, hardly affects the dispersibility of the pigment in the color filter ink, and in the formed colored portion. , Color, lightness, contrast ratio, and other optical characteristics are less affected.

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

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

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

Examples of the glycols constituting the polyalkylene glycol include propylene glycol such as ethylene glycol and 1,2-propylene glycol, various butylene glycols, various pentylene glycols, various hexylene glycols, and the like. Alternatively, two or more types can be used in combination. Among these, it is preferable to use an oligomer of ethylene glycol or an oligomer of 1,2-propylene glycol.
Moreover, it is preferable that the polyalkylene glycol does not substitute the terminal hydroxyl group.

The degree of polymerization of the polyalkylene glycol is preferably 3 to 40, and more preferably 3 to 20. Thereby, the thixotropic property of the color filter ink can be sufficiently reduced.
Moreover, it is preferable that the weight average molecular weights of polyalkylene glycol are 150-2000, It is more preferable that it is 180-1000, It is further more preferable that it is 180-500.

  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 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. And adding a fine dispersion process by adding inorganic beads in multiple stages to obtain a pigment dispersion, and a mixing process for mixing the pigment dispersion and the components constituting the resin material such as compound F .

<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.

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 components constituting the resin material such as Compound F (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, the ink set includes, as described above, the color filter ink of the present invention containing the halogenated phthalocyanine zinc complex as the main pigment and the sulfonated pigment derivative as the sub-pigment, and other color inks ( Color filter ink). The color filter ink of the present invention containing a halogenated phthalocyanine zinc complex and a sulfonated pigment derivative is usually used for forming a green colored portion. Accordingly, the ink set includes, for example, the ink used for forming the red colored portion (color filter ink) and the ink used for forming the blue colored portion (color filter ink) in addition to the color filter ink of the present invention. ).

When the ink set includes a red color filter ink (R ink) in addition to the color filter ink of the present invention (green color filter ink) as described above, the R ink is used as a pigment. , C.I. I. Pigment red 177 and its derivatives, and / or C.I. I. It is preferable to include CI Pigment Red 254 and its derivatives. Thereby, the color developability of the R ink can be made particularly excellent. Further, the long-term dispersion stability of the pigment particles in the color filter ink and the discharge stability of the color filter ink can be made particularly excellent.
C. I. Pigment Red 177 derivatives, C.I. I. In the case of containing a compound (derivative) represented by the following formula (35) or the following formula (36) as a derivative of CI Pigment Red 254, the effects as described above are more remarkably exhibited.

  Moreover, it is preferable that the composition of R ink and B ink contains the same kind of material as G ink except a coloring agent. In particular, when the R ink and the B ink contain the compound F as described above, the formed colored portion becomes flatter. In particular, when the R ink and the B ink include the polymer M as described above, the R ink and the B ink can have excellent pigment dispersion stability.

"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 set as described above.
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).
A set of different colored portions 12A, 12B, and 12C 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.

  The colored portion 12B is formed using the color filter ink of the present invention. For this reason, variation in characteristics between pixels is small, and unintentional color mixing (mixing of plural kinds of color filter inks) is reliably prevented. For this reason, the color filter 1 has high reliability in which the occurrence of uneven color and uneven density is suppressed. Moreover, since the coloring part 12B is flat, it has excellent brightness and contrast ratio.

<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.

  Further, as described above, the green color ink of the color filter ink 2 contains a halogenated phthalocyanine complex, a sulfonated pigment derivative, and compound F at the same time, and has excellent pigment dispersion stability and a comparative viscosity. Therefore, the droplet discharge stability is excellent. For this reason, even when the color filter 1 to be manufactured is large or when a large number of color filters 1 are manufactured continuously, it is possible to reliably prevent problems such as flight bending. The droplet discharge amount can be easily and reliably controlled. As a result, it is possible to reliably prevent problems such as color mixing, color unevenness / density unevenness, and reduction in contrast ratio in the manufactured color filter 1.

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 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 usually performed by heating. Thereby, the adhesiveness with respect to the board | substrate 11 of the colored part 12 formed can be made especially excellent. Moreover, it can prevent reliably that a liquid medium remains in the colored part 12 formed. As a result, the durability and reliability of the color filter 1 can be made particularly excellent. Also, the productivity of the color filter 1 is improved.

The heating temperature in this step (the temperature of the heated substrate 11) is not particularly limited, but is preferably 100 to 280 ° C, and more preferably 110 to 250 ° C. Accordingly, the curing reaction of the resin material can be efficiently advanced while preventing the unintentional deterioration / decomposition of the constituent material of the colored portion 12, and the liquid medium can be suitably removed from the color filter ink 2.
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. Moreover, the unintentional curing reaction of the resin material can be prevented by heating at a relatively low temperature.
In the second heat treatment, the liquid medium that could not be removed by the first heat treatment can be completely removed. In this step, when the color filter ink 2 is cured by reacting the resin material, the color filter ink 2 fixed in a flat state in the first heat treatment is efficiently cured in the shape. Can be made.

As described above, 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. Thus, the liquid medium can be suitably removed from the color filter ink 2 while reliably preventing convection of the color filter ink 2.
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. Further, in this step, when the color filter ink 2 is cured by reacting a resin material (curable resin material), the color filter ink 2 fixed in a flat state in the first heat treatment is used. It can be efficiently cured in that shape.
The time for the second heat treatment is not particularly limited, but is preferably 25 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.
The common electrode 61 and the pixel electrode 65 are made of a material having optical transparency to visible light, and are made of, for example, ITO.
Although not shown in the drawing, a plurality of switching elements (for example, TFT: thin film transistor) are provided so as to correspond to each pixel electrode 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 12B is formed using the color filter ink 2 (color filter ink set) of the present invention, variation in characteristics among pixels is suppressed. is there. As a result, in the liquid crystal display device 60, color unevenness, density unevenness, and the like at each part are suppressed, and an image excellent in brightness and contrast ratio can be stably displayed.

"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, 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 (4) x1: 180 parts by weight, the monomer component (compound) x2 represented by the formula (5): 15 parts by weight, the formula (6) 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 component x1, x2, x3 and represented by the said Formula (14).

(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 Example 6)
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 (15) 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 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 Y represented by the said Formula (16) including the monomer component y1.

(Synthesis Example 7)
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 (23). A polymer M1 as a combined M was obtained.
(Synthesis Examples 8 to 14)
The same operation as in Synthesis Example 7 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, seven types of polymers M (polymers M2 to M8) were obtained.

(Synthesis Example 15)
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, the monomer component (compound) w1: 188 parts by weight represented by the above formula (25) and the monomer component (compound) w2 represented by the above formula (26) w: 34 weights in the flask. Parts: monomer component (compound) w3: 74 parts by weight represented by the above formula (27), monomer component (compound) w4: 74 parts by weight represented by the above formula (28), as a radical initiator A solution obtained by dissolving 64 parts by weight of azobisdimethylvaleronitrile in 386 parts by weight of diethylene glycol monobutyl ether acetate was added dropwise over 5 hours using a dropping pump, and further aged for 3 hours. Then, it cooled to room temperature and obtained the polymer W1 as the polymer W represented by the said Formula (30) including the monomer components w1, w2, w3, and w4.
(Synthesis Examples 16 and 17)
The same operation as in Synthesis Example 15 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 18)
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 (31) z1: 276 parts by weight, the monomer component (compound) represented by the above formula (32) z2: 51 weights. A solution obtained 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 over 5 hours using a dropping pump, 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 (34) including the monomer components z1, z2, and z3.
(Synthesis Examples 19 and 20)
The same operation as in Synthesis Example 18 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 Z (polymers Z2 and Z3) were obtained.

In Table 1, the ratio of each monomer component which comprises each polymer synthesize | combined by the synthesis examples 1-20, 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 .1.0 ^2,6 ] decan-9-yl acrylate and 3,4-epoxytricyclo [5.2.1.0 ^2,6 ] decan-8-yl acrylate, indicated by “m7”, Tinyl methacrylate is indicated by “m3 ′”. 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 ethylene glycol monobutyl ether acetate, and “S5” represents ethyl octanoate. It shows that. 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. In addition, as the pigment, a halogenated phthalocyanine zinc complex represented by the above formula (7) (however, of the 16 X in the molecule, 2 are hydrogen atoms, 4 are chlorine atoms, 10 are bromine atoms) And a sulfonated pigment derivative powder having a chemical structure represented by the above formula (8). 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, 1,4-butanediol dimethacrylate as a polymer X1 and compound F, a leveling agent (Surfinol DF58, manufactured by Nissin Chemical Industry 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 green color filter ink (G ink) was obtained. The content ratio of the pigment of the obtained G ink was 10.1 wt%.

  In addition, the color filter ink (R ink) and the blue color filter ink (B ink) are the same as the green color filter ink except that the pigment type 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. Further, as pigments for R ink, C.I. I. Pigment Red 177 and a pigment derivative represented by the above formula (35); I. Pigment Red 254 and a pigment derivative represented by the above formula (36) and a sulfonated pigment derivative powder having a chemical structure represented by the above formula (8) are used to form a pigment in the final R ink. The content of 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%. In addition, C.I. I. The content of the pigment derivative represented by the formula (35) in the mixture of Pigment Red 177 and the pigment derivative represented by the formula (35) was 0.1 to 10 wt%. In addition, C.I. used in the above Examples and Comparative Examples. I. The content rate of the pigment derivative represented by the formula (36) in the mixture of Pigment Red 254 and the pigment derivative represented by the formula (36) was 0.1 to 10 wt%.

(Examples 2 to 14)
A color filter ink (G ink) 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 2. For the R ink and the B ink, the same pigment as that used in Example 1 was used, and the other materials used were the same materials as the G ink used in each example.

(Comparative Examples 1-3)
A color filter ink (G ink) 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 2. For the R ink and B ink, the same pigments as those used in Example 1 were used, and for the other materials, the same materials as those used for the G ink of each comparative example were used.
In each of the above Examples and Comparative Examples, all of the polymers M, W, Z, and R are used in the preliminary dispersion step, and the polymers X, Y, and the compound F are used in the mixing step. It was.

Table 2 summarizes the types, contents, and the like of the components of the color filter ink in each of the above Examples and Comparative Examples. In the table, a zinc complex of halogenated phthalocyanine represented by the above formula (7) (however, of 16 X in the molecule, 2 are hydrogen atoms, 4 are chlorine atoms, 10 are bromine atoms. ), And a halogenated phthalocyanine zinc complex represented by the above formula (7) (wherein, of the 16 Xs in the molecule, 1 is a hydrogen atom, 3 are chlorine atoms, “HDZC2” is a powder composed of 12 bromine atoms, “SPD1” is a powder composed of a pigment derivative represented by the above formula (8) (the number of sulfo groups in the molecule is 1), A powder composed of a pigment derivative represented by the formula (8) (the number of sulfo groups in the molecule is 2) is referred to as “SPD2”, C.I. I. Pigment Green 36 is “PG36”, Compound F (molecular weight: 226) represented by Formula (9) is “F1”, Compound F (molecular weight: 226) represented by Formula (10) is “F2”, Formula (11) Compound F (molecular weight: 240) represented by formula (12) is represented by “F3”, and compound F represented by formula (12) (where b≈4, weight average molecular weight: 330) is represented by formula (12). Compound F (wherein b≈9, weight average molecular weight: 540) is “F5”, compound F represented by formula (13) (molecular weight: 268) is “F6”, SPCN-17X as a thermoplastic resin (Showa) “R”, manufactured by Kobunshi Co., Ltd., Dispersic 111 (acid value: 50 KOHmg / g) as “DA1”, Dispersic 2095 (acid value: 13 KOHmg / g) as “DA2,” Dispersic P104 (acid value: 360 KOH) g / g) “DA3”, Dispersic 166 (amine number: 115 KOH mg / g) “DA4”, Dispersic 9075 (amine number: 12 KOH mg / g) “DA5”, leveling agent (Surfinol DF58, Nissin) Chemical Industry Co., Ltd.)) "DF58", Leveling Agent (LHP-90, Enomoto Kasei Co., Ltd.) "L90", Leveling Agent (LHP-95, Enomoto Kasei Co., Ltd.) "L95", Leveling Agent (LF-1970, manufactured by Enomoto Kasei Co., Ltd.) “LF”, leveling agent (Olfin SPC, manufactured by Nissin Chemical Industry Co., Ltd.) “SPC”, antioxidant (TINUVIN 152, manufactured by Ciba Japan Co., Ltd.) This is indicated by “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”. In the table, the content of the polymer X in the color filter ink is C _X [wt%], the content of the compound F is C _F [wt%], and the content of the sulfonated pigment derivative is C _D [wt %].
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.

[3] Evaluation of ink for color filter [3.1] Accuracy of landing position Droplet discharge device as shown in FIGS. 3 to 6 installed in a chamber (thermal chamber), and green of each of the examples and comparative examples Color filter ink (G ink) was prepared, and the ejection waveform of 100,000 (100,000 droplets) was continuously ejected from each nozzle of the droplet ejection head for each ink in a state where the drive waveform of the piezo element was optimized. Went. For the 100,000 droplets ejected from the designated nozzle near the center of the droplet ejection head, the average value of the deviation amount d from the center aiming position of the center position of each landed droplet is obtained, and the following four steps Evaluation was performed according to the criteria of
A: The average value of the shift amounts d is less than 0.02 μm.
B: The average value of the shift amount d is 0.02 μm or more and less than 0.07 μm.
C: The average value of the shift amount d is 0.07 μm or more and less than 0.11 μm.
D: The average value of the shift amounts d is 0.11 μm or more.

[3.2] Continuous Discharge Test Using a droplet discharge device as shown in FIGS. 3 to 6 installed in a chamber (thermal chamber), the color filter ink set of each of the above examples and comparative examples, 25 G ink constituting the color filter ink set was discharged by continuously operating the droplet discharge device for 72 hours in an environment of 35 ° C. and 35% 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 four criteria.

A: No nozzle clogging occurs.
B: The occurrence rate of nozzle clogging is less than 0.5% (excluding zero), and clogging can be eliminated by cleaning.
C: The occurrence rate of nozzle clogging is 0.5% 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, or clogging cannot be eliminated by cleaning.

[3.3] Dispersion stability The color filter inks (G inks) of the above examples and comparative examples were allowed to stand for 40 days in an environment at 55 ° C., and then visually observed. And evaluated.
A: No change from before heating is observed.
B: Almost no aggregation or sedimentation of pigment particles is observed.
C: Slight aggregation / precipitation of pigment particles is observed.
D: Aggregation / sedimentation of pigment particles is clearly observed.
E: Aggregation / sedimentation of pigment particles is noticeable.

[3.4] Viscosity change due to change in solid content The green color filter ink (G ink) of each example and each comparative example was left in an environment of 100 ° C., and the solid in the original color filter ink The liquid medium was removed so that the solid content increased by 10.0 wt% relative to the amount. And about the ink for color filters which removed the liquid medium, the viscosity: (eta) _A in 25 degreeC of the said ink for color filters was measured. Then, the viscosity at 25 ° C. of the color filter ink before removing the liquid medium was compared with η _B, and the change in viscosity due to the change in the solid content was evaluated according to the following five-stage criteria.

The solid content of the color filter ink is as follows: 1 g of color filter ink is applied to a glass plate by spin coating so that the film thickness is about 1 mm, and left at 200 ° C. for 1 hour. The weight remained without volatilization. The solid content in the color filter ink was the ratio [wt%] of the solid content to the total weight of the color filter ink.
Moreover, the viscosity was measured according to JIS Z8809 using a vibration viscometer.

A: η _A / η _B ≦ 3.0
B: 3.0 <η _A / η _B ≦ 6.0
C: 6.0 <η _A / η _B ≦ 10.0
D: 10.0 <η _A / η _B ≦ 30.0
E: 30.0 <η _A / η _B
In addition, each 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 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, by performing heat treatment in an oven at 230 ° C. for 60 minutes (second heat treatment), colored portions of three colors (red (R), green (G), and blue (B)) were formed. Thereafter, washing with N-methyl-2-pyrrolidone and γ-butyllactone was performed, and a color filter as shown in FIG. 1 was obtained.
Using the method as described above, 6000 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 Of the color filters manufactured using the color filter inks (ink sets) of the respective Examples and Comparative Examples, the color filters manufactured for the 4000th sheet are respectively Then, a liquid crystal display device as shown in FIG. 7 was manufactured under the same conditions.
Using these liquid crystal display devices, visual observation is performed in a dark room with a single color display of green and a single color display of white, and the occurrence of color unevenness and density unevenness at each part is determined in the following five stages. Evaluation was performed according to the criteria of

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] Characteristic difference between individuals Among the color filters manufactured using the color filter inks (ink sets) of the respective Examples and Comparative Examples, the first to tenth sheets and 2990, respectively. A color filter manufactured on the 2nd to 2999th sheets was prepared, a single color display of green was performed in a dark room, and color measurement was performed using a spectrophotometer (MCPD3000, manufactured by Otsuka Electronics Co., Ltd.). From the results, for each example and each comparative example, the color difference (in the Lab display system) that is the largest among the color filters manufactured in the 1st to 10th sheets and the 2990 to 2999th sheets (total 20 color filters), respectively. The color difference ΔE) was determined and evaluated according to the following five-step criteria.

A: Color difference (ΔE) is less than 2.2.
B: Color difference (ΔE) is 2.2 or more and less than 3.2.
C: Color difference (ΔE) is 3.2 or more and less than 4.2.
D: Color difference (ΔE) is 4.2 or more and less than 5.2.
E: Color difference (ΔE) is 5.2 or more.

[5.3] Flatness of colored portion Of the color filters manufactured using the color filter inks (ink sets) of the respective Examples and Comparative Examples, the color filters manufactured on the 31st sheet are respectively Prepared.
About these color filters, using a stylus type roughness meter (manufactured by Tencor, P-15), the difference ΔD between the maximum height and the minimum height of the green colored portion is obtained, and according to the following three-stage criteria, evaluated.
A: ΔD is less than 0.2 μm.
B: ΔD is 0.2 μm or more and less than 0.5 μm.
C: ΔD is 0.5 μm or more.

[6] Evaluation of contrast ratio Using the color filter ink (ink set) of each of the above examples and comparative examples, 10000 color filters whose color parts are all green are produced in the same manner as in [4]. A liquid crystal display device as shown in FIG. 7 was manufactured under the same conditions using the color filter manufactured for the 6000th sheet. Thus, a liquid crystal display device having a green color filter in each of the embodiments and comparative examples is prepared, and all color display (image display in the entire pixel effective area) is performed, and a photometer (PHOTO RESEARCH) Manufactured by PR-800), a contrast ratio (CR) was obtained in comparison with the case where color display was not performed, and evaluation was performed according to the following five-step criteria.

A: CR is 5400 or more.
B: CR is 4800 or more and less than 5400.
C: CR is 4200 or more and less than 4800.
D: CR is 3600 or more and less than 4200.
E: CR is less than 3600.

[7] Lightness Evaluation The liquid crystal display device in which the colored parts produced in [6] are all green was evaluated as shown below. For a liquid crystal display device, a single color display of green is performed, and tristimulus values are obtained by a xyY colorimetric method using a chromaticity meter (manufactured by Minolta, CM-3700d, using C light source as a light source), and the Y value of green light Was evaluated according to the following five-step criteria.

A: Brightness Y is 56.0 or more.
B: The brightness Y is 55.3 or more and less than 56.0.
C: Brightness Y is 54.7 or more and less than 55.3.
D: Brightness Y is 54.0 or more and less than 54.7.
E: Lightness Y is less than 54.0.
These results are shown in Table 3.

As is apparent from Table 3, in the present invention, the manufactured color filter was suppressed in uneven density and uneven color in each part, and excellent in uniformity of characteristics among individuals. In the present invention, the produced color filter was excellent in brightness and contrast ratio.
On the other hand, in each comparative example, a satisfactory result was not obtained.
Further, when a commercially available liquid crystal television was disassembled and the liquid crystal display device part was replaced with one manufactured as described above, and the same evaluation as described above was performed, the same result as above was obtained.

  DESCRIPTION OF SYMBOLS 1 ... Color filter 11 ... Board | substrate 12 ... Coloring part 12A ... 1st coloring part 12B ... 2nd coloring part 12C ... 3rd coloring part 13 ... Partition (bank) (light-shielding part) 14 ... Cell 2 ... 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 (14)

A color filter ink used in the production of an ink jet color filter,
A pigment comprising a halogenated phthalocyanine zinc complex as a primary pigment and a sulfonated pigment derivative as a secondary pigment;
A liquid medium in which the pigment is dispersed;
A color filter ink comprising a compound F represented by the following formula (1):

The color filter ink according to claim 1, wherein the pigment derivative has a chemical structure represented by the following formula (2).

  3. The color filter ink according to claim 1, wherein a content of the sub-pigment is 10 to 80 parts by weight with respect to 100 parts by weight of the main pigment.   The color filter ink according to claim 1 or 2, wherein a content of the sub-pigment is 4 to 30 parts by weight with respect to 100 parts by weight of the compound F.   The color filter ink according to claim 1, wherein the compound F has an alkylene glycol chain. The color filter ink according to any one of claims 1 to 5, wherein the compound F has a structure represented by the following formula (3).

  The color filter ink according to any one of claims 1 to 6, wherein the compound F has a molecular weight of 184 to 492. Polymer X containing monomer component x1 represented by the following formula (4), monomer component x3 represented by the following formula (5), and monomer component x4 represented by the following formula (6) The color filter ink according to claim 1, comprising:

  The liquid medium is selected from the group consisting of 1,3-butylene glycol diacetate, ethylene glycol monobutyl ether acetate, 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 of the above.   The liquid medium is further one or two selected from the group consisting of diethylene glycol mononormal butyl ether, triethylene glycol mononormal butyl ether, ethyl 3-ethoxypropionate, dipropylene glycol dimethyl ether, and 3-methoxybutyl acetate. The color filter ink according to claim 9, comprising the above.   A color filter manufactured using the color filter ink according to claim 1.   An image display device comprising the color filter according to claim 11.   The image display device according to claim 12, wherein the image display device is a liquid crystal panel.   An electronic apparatus comprising the image display device according to claim 12.

Images