JP2010276649A - Ink for color filter, color filter, image display device, and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide: ink for a color filter, with which a color filter having suppressed color unevenness and concentration unevenness at respective regions and excellent in contrast ratio and in brightness is produced and which has excellent discharge stability of liquid droplets; a color filter in which the color unevenness and the concentration unevenness at the respective regions are suppressed and which is excellent in the contrast ratio, in the brightness, and in light resistance; and an image display device including the color filter and an electronic apparatus. <P>SOLUTION: The ink for the color filter is used for a production of the color filter with an inkjet method, and includes a pigment containing C.I. pigment blue 15:6 and a dyestuff A represented by formula (1) wherein: R1 is an amino group or the like; R2 and R3 are each independently an aryl group or the like; and R4 and R5 are each independently an alkoxy group or the like. <P>COPYRIGHT: (C)2011,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 color filter manufacturing process remains as a colored layer in the finally obtained color filter, and most of it is removed in the manufacturing process. It becomes. 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 for forming a colored layer (colored portion) of a color filter by ejecting color filter ink using an inkjet head (droplet ejection 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.

  In general, a color filter ink used in a method for producing a color filter using such an inkjet head includes a colorant and a liquid medium (solvent) in which the colorant is dissolved and dispersed. Examples of the colorant include pigments and dyes, and pigments generally have characteristics such as excellent light resistance as compared to dyes and are widely used as colorants. In the production of a color filter, usually, three color inks (color filter inks) corresponding to the three primary colors of light (red, green, and blue) are used.

  Among these, as a colorant for a color filter ink corresponding to blue, C.I. I. Pigment Blue 15: 6 is widely used. However, C.I. I. Since pigment blue 15: 6 is a pigment, it is necessary to sufficiently atomize the pigment particles in order to sufficiently increase the brightness, contrast ratio, and the like of the colored layer to be formed. When these pigment particles are sufficiently atomized, the viscosity of the color filter ink increases as the pigment particles are atomized. In such a case, when 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 the droplets are applied to the target site. May not be able 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 colors) on the substrate on which droplets are to be landed, or may be the same in nature. Variations in color density between multiple colored parts that are required to have a color density occur, resulting in color unevenness, density unevenness, etc. in each part of the color filter. Variations in characteristics (particularly color characteristics such as contrast ratio and color reproduction range) among a large number of color filters result in low reliability of the color filters.

JP 2008-225124 A

  An object of the present invention is to provide a color filter ink that is excellent in droplet ejection stability, in which color unevenness and density unevenness in each part are suppressed, and a color filter excellent in contrast ratio and brightness can be produced. Another object of the present invention is to provide a color filter excellent in contrast ratio, brightness, and light resistance, in which color unevenness and density unevenness in each part are suppressed, and an image display device and electronic apparatus provided with the color filter.

これにより、各部位での色むら、濃度むらが抑制され、コントラスト比、明度に優れたカラーフィルターを製造することのできる液滴の吐出安定性に優れた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,
C. I. Pigment Blue 15: 6 and a dye A represented by the following formula (1) are included.

As a result, it is possible to provide a color filter ink with excellent droplet ejection stability that can suppress color unevenness and density unevenness at each site and can produce a color filter with excellent contrast ratio and brightness. .

In the color filter ink of the present invention, the content of the dye A in the color filter ink is X _DA [wt%], the C.I. I. It is preferable that the relationship of 0.01 ≦ X _DA / X _PB ≦ 0.40 is satisfied when the content ratio of Pigment Blue 15: 6 is X _PB [wt%].
As a result, C.I. I. The dispersion stability of pigment particles such as CI Pigment Blue 15: 6 can be made particularly excellent. As a result, the lightness and contrast of the colored portion formed using the color filter ink are made particularly excellent. In addition, the discharge stability of the color filter ink droplets can be made particularly excellent. In addition, the content of the dye A in the color filter ink becomes too high, the viscosity of the color filter ink becomes high, or the content of the blue pigment relatively decreases, and the color filter ink is formed using the color filter ink. It is possible to prevent the colored portion from being deviated from a desired color tone and the brightness and contrast ratio from being lowered.

The color filter ink of the present invention preferably further includes an acid value dispersant having a predetermined acid value and an amine value dispersant having a predetermined amine value.
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. In addition, in the manufactured color filter, the contrast ratio and brightness of the colored portion are excellent.

In the color filter ink of the present invention, the acid value of the acid value dispersant is AV [KOHmg / g], the amine value of the amine value dispersant is BV [KOHmg / g], and the content of the acid value dispersant is When X _A [wt%] and the content of the amine value dispersant are X _B [wt%], a relationship of 0.01 ≦ (AV × X _A ) / (BV × X _B ) ≦ 1.9 is established. It is preferable to satisfy.
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 pigment dispersion stability in the color filter ink is excellent. In particular, the droplet discharge stability and the like can be made particularly excellent. Further, the brightness and contrast ratio of the colored portion to be formed can be made sufficiently high.

In the color filter ink of the present invention, the monomer component m1 represented by the following formula (2), the monomer component m2 having a carboxyl group or an acid anhydride group, and the following formula (3) are further represented. It is preferable that the polymer M containing the monomer component m3 is included.

  As a result, the color filter ink has a sufficiently low viscosity and is particularly excellent in droplet ejection stability. In addition, the color filter ink is easy to maintain fluidity for a relatively long period of time when the liquid medium is removed when forming the colored portion, and the formed colored portion has less unevenness. Therefore, the brightness and contrast ratio are higher.

これにより、形成される着色部は、明度およびコントラスト比がより高いものとなる。 In the color filter ink of the present invention, the monomer component x1 represented by the following formula (4), the monomer component x2 represented by the following formula (5), and the following formula (6) are further represented. It is preferable that the polymer X containing the monomer component x3 is included.

Thereby, the colored part to be formed has higher brightness and contrast ratio.

The color filter ink of the present invention further includes a liquid medium in which the pigment is dispersed,
The liquid medium is 1,3-butylene glycol diacetate, ethylene glycol monobutyl ether acetate, 2- (2-methoxy-1-methylethoxy) -1-methylethyl acetate, diethylene glycol monobutyl ether acetate, tripropylene glycol dimethyl ether and It is preferable to include one or more selected from the group consisting of ethyl octoate.

  These compounds are low in viscosity and have little change in viscosity due to temperature, and can dissolve the dye A as described above suitably. For this reason, the pigment particles to which the dye A is adhered can be stably dispersed in the liquid medium, and the viscosity of the color filter ink is sufficiently low. In addition, since the pigment can be stably dispersed in the form of fine particles, the colored portion formed using the color filter ink has a sufficiently high contrast ratio and brightness.

In the color filter ink of the present invention, the pigment is preferably atomized in a mixture containing the pigment and the dye A.
As a result, the brightness and contrast of the colored portion formed using the color filter ink can be made particularly excellent, and the discharge stability of the color filter ink droplets can be made particularly excellent. Can do.

The color filter of the present invention is manufactured using the color filter ink of the present invention.
Thereby, color unevenness and density unevenness in each part are suppressed, and a color filter excellent in contrast ratio and brightness can be provided.
An image display device according to the present invention includes the color filter according to the present invention.
As a result, it is possible to provide an image display device that can stably display an image with excellent brightness and contrast ratio by suppressing color unevenness and density unevenness at each part.

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 stably display an image with excellent brightness and contrast ratio by suppressing color unevenness and density unevenness at each part.
An electronic apparatus according to the present invention includes the image display device according to the present invention.
Accordingly, it is possible to provide an electronic device that can suppress uneven color and density unevenness at each portion and can stably display an image having excellent brightness and contrast ratio.

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 colorant, a liquid material in which the colorant is dispersed or dissolved, and the like.
The color filter ink is applied to a cell provided on the substrate using a droplet discharge device, as will be described later. The color filter ink applied to the cell is removed by solidification by a process such as heating, and becomes a colored portion.

<Colorant>
The color filter ink of the present invention contains C.I. I. A pigment containing CI Pigment Blue 15: 6 and a dye A represented by the following formula (1). The present invention is characterized in this respect.

  More specifically, in the conventional color filter ink, C.I. I. When a pigment containing Pigment Blue 15: 6 is used as a colorant, it is necessary to atomize the pigment in order to sufficiently increase the brightness and contrast ratio of the color filter formed using the color filter ink. However, when the above pigment is sufficiently atomized, the viscosity of the color filter ink tends to increase, and the pigment particles are difficult to stably disperse.

  On the other hand, the color filter ink of the present invention has C.I. I. Dye A is included along with pigments including Pigment Blue 15: 6. Dye A is C.I. I. It adheres to the particle surface of the pigment containing Pigment Blue 15: 6, contributes to improving the affinity of the pigment particle to the liquid medium, and improves the dispersion stability of the pigment particle in the liquid medium. As a result, the color filter ink can have excellent droplet ejection stability. And in the color filter manufactured using the color filter ink, color unevenness and density unevenness at each part are sufficiently suppressed. Further, since the pigment particles are stably dispersed, the brightness and contrast ratio of the colored portion of the color filter are excellent.

Hereinafter, each colorant will be described.
[C. I. Pigment Blue 15: 6]
As described above, the color filter ink is C.I. I. Pigment Blue 15: 6. C. I. Pigment Blue 15: 6 is a blue pigment, which has a sufficiently high color density and is excellent in the color density of the colored part when used in a color filter. For this reason, when such a pigment is used, the obtained color filter has a wide color reproduction range. In addition, C.I. I. Pigment Blue 15: 6 is a pigment excellent in light resistance and heat resistance, and when such a pigment is used, the obtained color filter maintains a wide color reproduction range over a long period of time.

On the other hand, C.I. I. Pigment Blue 15: 6 was difficult to stably disperse when the pigment particles were small in the color filter ink. However, in the present invention, the dye A is contained in the color filter ink. This prevents such a problem.
C. in the color filter ink I. The content of Pigment Blue 15: 6 is not particularly limited, but is preferably 0.4 wt% or more and 10 wt% or less, and more preferably 1.0 wt% or more and 8.0 wt% or less. As a result, C.I. I. Pigment Blue 15: 6 can be more stably dispersed, and the color filter ink is excellent in ejection stability and pigment dispersion stability. Further, the color density, contrast ratio, and brightness of the colored portion of the obtained color filter can be made particularly high at the same time, and the color reproduction range can be made sufficiently wide.

[Dye A]
The dye A is a compound represented by the above formula (1) and dissolves in a medium such as a solvent or a resin material, and usually exhibits a blue or purple color.
As described above, the dye A adheres to the particle surface of the pigment particles (particularly CI Pigment Blue 15: 6) and has excellent affinity for the liquid medium of the pigment particles. The dispersion stability of pigment particles in the ink for use is improved. As a result, the contrast of the colored part formed using the color filter ink can be made excellent, and the droplet ejection stability of the color filter ink can be made excellent.

This is because the dye A has an appropriate polarity and the chemical structure of the entire dye A molecule is asymmetric. I. It is considered that the affinity for Pigment Blue 15: 6 and the surrounding liquid medium can be improved at the same time. In addition, since the dye A has two aromatic rings in the anthraquinone skeleton, the dye A molecules hardly aggregate and are easily dispersed. For this reason, C.I. I. It is considered that the dye A molecules adhering to the surface of the pigment blue 15: 6 particles are prevented from further adhering to the dye A molecules, and therefore aggregation via a plurality of dye A molecules is unlikely to occur.
In addition, since the dye A exhibits purple or blue as described above, the color tone of the colored portion formed using the color filter ink is adjusted by including the dye A in the color filter ink. Is done.

In the above formula (1), R1 is an amino group, an alkoxy group, or a hydroxyl group.
Examples of the amino group include a substituted or unsubstituted alkylamino group having 1 to 30 carbon atoms and a substituted or unsubstituted arylamino group having 6 to 30 carbon atoms. Examples of the substituent include a hydroxyl group, an alkoxy group, a cyano group, and a halogen atom, a sulfo group (which may be in the form of a salt) and a carboxyl group (which may be in the form of a salt) (hereinafter, other substituents are also included). the same). Specific examples of the amino group include amino, methylamino, ethylamino, dimethylamino, anilino, N-methyl-anilino, diphenylamino, hydroxyethylamino, carboxyethylamino, sulfoethylamino, 3,5-dicarboxyani Reno etc. are mentioned.

  The alkoxy group includes substituted and unsubstituted alkoxy groups. The substituted or unsubstituted alkoxy group is preferably an alkoxy group having 1 to 30 carbon atoms. Examples of the substituent include the same substituents as the aryl group. Examples of the alkoxy group include methoxy, ethoxy, isopropoxy, n-octyloxy, methoxyethoxy, hydroxyethoxy, 3-carboxypropoxy and the like.

In the above formula (1), R2 and R3 each independently represent an aryl group, an alkyl group or a hydrogen atom.
The aryl group is a substituted or unsubstituted aryl group having 6 to 30 carbon atoms. Specific examples thereof include phenyl, m-methylphenyl, p-methylphenyl, p-tolyl, naphthyl, m-chlorophenyl, o- And hexadecanoylaminophenyl.

  Alkyl groups include substituted and unsubstituted alkyl groups. The substituted or unsubstituted alkyl group is preferably an alkyl group having 1 to 30 carbon atoms. Examples of the alkyl group include methyl, ethyl, propyl, isopropyl, butyl, t-butyl, n-octyl, eicosyl, 2-chloroethyl, hydroxyethyl, cyanoethyl, 4-sulfobutyl and the like.

In the above formula (1), R4 and R5 each independently represent an alkoxy group, an aryloxy group or a hydrogen atom.
The aryloxy group is a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, and specific examples include phenoxy, 2-methylphenoxy, 4-t-butylphenoxy, 3-nitrophenoxy, 2-tetra Examples include decanoylaminophenoxy.
The alkoxyl group in R4 is the same as the alkoxyl group in R2 or R3.
Specific examples of the dye A that can be used in the present invention include compounds represented by the following formulas (7) to (13).

  Among the above, it is preferable that the dye A includes a compound represented by the above formula (7) (hereinafter also referred to as a dye A1). The dye A1 easily adheres favorably to the surface of pigment particles (particularly CI Pigment Blue 15: 6), and has a particularly remarkable effect in improving the dispersion stability of the pigment particles. As a result, the color filter ink has particularly excellent droplet ejection stability, and the color filter manufactured using the color filter ink has further suppressed color unevenness and density unevenness in each part. It will be a thing. In addition, the pigment particles are stably dispersed in the colored portion in the color filter, and the colored portion has higher brightness and contrast ratio.

  Furthermore, the dye A1 has a property that is relatively difficult to change with respect to mechanical force. For this reason, for example, when the pigment is atomized, the pigment and the dye A1 are mixed to obtain a mixture, and the pigment can be atomized in the mixture. In such a case, the atomization of the pigment proceeds favorably, the dye A1 is more easily attached near the surface of the pigment particle, and the effect of improving the dispersion stability of the pigment particle of the dye A1 is further improved. It will be remarkable.

In addition, since the dye A1 is excellent in light resistance, heat resistance, and the like, the durability and reliability of the manufactured color filter can be made particularly excellent. In particular, the color filter ink contains a resin material to be described later, and even when the resin material is cured at the time of forming the colored portion, the compound having the chemical structure represented by the formula (1) is: Less likely to cause modification and deterioration associated with the curing reaction of the resin material. Therefore, a colored portion having a desired color tone can be reliably formed.
The dye A may be composed of a single compound, or may be a mixture of a plurality of types of compounds.

The content of the dye A in the color filter ink is not particularly limited, but is preferably 0.03 wt% or more and 1.5 wt% or less, more preferably 0.08 wt% or more and 0.9 wt% or less. . As a result, C.I. I. The dispersion stability of pigment particles such as CI Pigment Blue 15: 6 can be made particularly excellent, and the content of the dye in the color filter ink is too high, so that the color filter ink is formed. The content of dye A in the color filter ink is X _DA [wt%], C.I. I. When the content ratio of Pigment Blue 15: 6 is X _PB [wt%], it is preferable to satisfy the relationship of 0.01 ≦ X _DA / X _PB ≦ 0.40, and 0.02 ≦ X _DA / X _PB It is more preferable to satisfy the relationship of ≦ 0.23. As a result, C.I. I. The dispersion stability of pigment particles such as CI Pigment Blue 15: 6 can be made particularly excellent. As a result, the lightness and contrast of the colored portion formed using the color filter ink are made particularly excellent. In addition, the discharge stability of the color filter ink droplets can be made particularly excellent. In addition, the content of the dye A in the color filter ink becomes too high, the viscosity of the color filter ink becomes high, or the content of the blue pigment relatively decreases, and the color filter ink is formed using the color filter ink. It is possible to prevent the colored portion from being deviated from a desired color tone and the brightness and contrast ratio from being lowered.
The dye A is suitably attached to the surface of the pigment particles by, for example, mixing the pigment and the dye A as described later to obtain a mixture and atomizing the pigment in the mixture. Thereby, the effect of dye A mentioned above can be acquired more notably, and the effect of the present invention can be acquired more notably.

[Other colorants]
In the present invention, the color filter ink contains C.I. I. Pigment Blue 15: 6 may be included, but pigment components other than these (other pigments) 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 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 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 Blue 1,15,15: 1,15: 2,15: 3,15: 4, 17: 1,18,60,27,28,29,35,36,60,80; I. Pigment Green 7, 36, 15, 17, 18, 19, 26, 50, 58; 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. Among the above, C.I. I. The pigment violet 23 is suitably used for adjusting the color tone when preparing a blue color filter ink.

Note that C.I. I. When pigments are included in addition to Pigment Blue 15: 6, the content of these pigments in the color filter ink (the total content of each pigment) is C.I. I. It is preferable that it is smaller than the content ratio in the pigment blue 15: 6 color filter ink.
In the present invention, the color filter ink may contain dye A as a dye, but may contain other dye components (other dyes).

  Examples of other dyes 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 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. 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. Acid Green 16, C.I. I. Acid Blue 9, 45, 80, 83, 90, 185, C.I. I. Solvent Violet 8, 9, 11, 12, 14, 17, 28, 31, 36, 37, 38, 56, 58, 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. Basic oranges 21, 23 and the like can be mentioned, and one or more selected from these can be used in combination.

  The content of the colorant in the color filter ink is preferably 2.0 wt% or more and 25 wt% or less, more preferably 3.5 wt% or more and 20 wt% or less, and 6.0 wt% or more and 12.0 wt%. % Or less is more preferable. When the content of the colorant is a value within the above range, the viscosity of the color filter ink can be made sufficiently low, and the discharge stability of the droplets can be made particularly excellent. In the produced color filter, a higher coloring density can be ensured. Conventionally, when a colorant is contained at a relatively high concentration as described above, the ejection stability tends to be low, and when ejecting droplets of color filter ink, flight bending or droplet ejection Problems such as destabilization of quantity 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 a colorant is contained at a relatively high concentration, it is possible to reliably prevent the occurrence of the above problems, and the color at each part of the manufactured color filter. Unevenness, unevenness of density, etc. and variations in characteristics among individuals can be reliably prevented, and a color filter can be produced with excellent productivity. That is, when the color filter ink contains a relatively high concentration of the colorant as described above, the effects of the present invention are more remarkably exhibited.

  The average particle size of the pigment particles in the color filter ink is not particularly limited, but is preferably 10 nm or more and 200 nm or less, and more preferably 20 nm or more and 180 nm or less. As a result, the 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.

<Liquid medium>
The liquid medium (liquid medium) functions as a dispersion medium for dispersing the pigment as described above. On the other hand, the liquid medium also functions as a solvent for dissolving a dye, a resin material described later, and the like. In general, most of the liquid medium is removed in the process of manufacturing the color filter.

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

  Among them, as the liquid medium, 1,3-butylene glycol diacetate, ethylene glycol monobutyl ether acetate, 2- (2-methoxy-1-methylethoxy) -1-methylethyl acetate, diethylene glycol monobutyl ether acetate, tripropylene glycol It preferably contains one or more selected from the group consisting of dimethyl ether and ethyl octoate, and more preferably contains diethylene glycol monobutyl ether acetate. These compounds have a low viscosity and a small change in viscosity due to temperature, and can suitably dissolve the dye A (particularly the dye A1) as described above. For this reason, the pigment particles to which the dye A is adhered can be stably dispersed in the liquid medium, and the viscosity of the color filter ink is sufficiently low. In addition, since the pigment can be stably dispersed in the form of fine particles, the colored portion formed using the color filter ink has a sufficiently high contrast ratio and brightness.

  The boiling point of the liquid medium under atmospheric pressure (1 atm) is preferably 160 ° C. or higher and 300 ° C. or lower, more preferably 180 ° C. or higher and 290 ° C. or lower, and 200 ° C. or higher and 280 ° C. or lower. Further preferred. When the boiling point of the liquid medium under atmospheric pressure is a value within the above range, clogging or the like in the droplet discharge head that discharges the color filter ink can be more effectively prevented, and the productivity of the color filter is improved. Can be made particularly excellent.

  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 wt% or more and 98 wt% or less, more preferably 60 wt% or more and 95 wt% or less, and further preferably 65 wt% or more and 93 wt% or less. preferable. When the content of the liquid medium is a value within the above range, the color filter 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 are easy to dissolve the above-described dye A (particularly, dye A1) and a resin material as described later. 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. As described above, when the unevenness in the colored portion is reduced, the brightness and contrast ratio of the colored portion are higher.
In addition, the content of the subcomponents as described above in the color filter ink is preferably 3.0 wt% or more and 25 wt% or less, and more preferably 7.0 wt% or more and 20 wt% or less.

<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.
Examples of the resin material contained in the color filter ink 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.
Further, the polymer X has a relatively high affinity with the above-described dye A (particularly the dye A1). For this reason, even when a large part of the liquid medium is removed at the time of forming the colored portion, the polymer X and the dye A can be suitably mixed, and the dye A is precipitated, It is possible to prevent the pigment particles to which A is attached from being aggregated. As a result, the colored portion to be formed has higher brightness and contrast ratio.

(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 A).) Is preferably 30 wt% or more and 90 wt% or less, and more preferably 40 wt% or more and 80 wt% or less. When the content of the monomer component x1 in the polymer X is a value within the above range, the above-described effects 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 wt% or more and 20 wt% or less, and more preferably 3 wt% or more and 15 wt% or less. 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. As a result, the brightness and contrast ratio of the colored portion are higher.

  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. By this, in the colored part forming step (curing step) performed in a heating environment while reliably preventing unintentional reaction (polymerization reaction) of the resin material during storage of the color filter ink or in the ink application step described later Can 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 wt% or more and 20 wt% or less, and more preferably 3 wt% or more and 15 wt% or less. 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 or more and 50000 or less, more preferably 1200 or more and 10,000 or less, and further preferably 1500 or more and 5000 or less. 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) 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.

Further, the dispersity (weight average molecular weight Mw / number average molecular weight Mn) of the polymer X is preferably 1 or more and 3 or less.
The content of the polymer X in the color filter ink is preferably 0.3 wt% or more and 13.0 wt% or less, and more preferably 0.7 wt% or more and 8.0 wt% or less.

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

[Polymer M]
The polymer M includes a monomer component m1 represented by the following formula (2), a monomer component m2 having a carboxyl group or an acid anhydride group, a monomer component m3 represented by the following formula (3), 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 is particularly excellent in droplet ejection stability. In addition, the color filter ink is easy to maintain fluidity for a relatively long time even when the liquid medium is removed when forming the colored portion, and the formed colored portion has less unevenness. , The brightness and contrast ratio will be higher. 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 (2), 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 (2) 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 (2), R ¹ represents a hydrogen atom or a methyl group, and R ² represents a divalent aliphatic saturated hydrocarbon group having 1 to 8 carbon atoms. R ³ represents a residue of an isocyanate group blocking agent R ³ H.
Examples of the divalent saturated aliphatic hydrocarbon group having 1 to 8 carbon atoms in R ² include a methylene, ethylene, trimethylene, propylene, tetramethylene, pentamethylene, hexamethylene, heptamethylene, octamethylene group and the like. A linear or branched divalent saturated aliphatic hydrocarbon group (alkylene group) may be mentioned. Among these, a divalent saturated aliphatic hydrocarbon group having 2 to 4 carbon atoms such as ethylene, trimethylene, and propylene group is 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; an 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 (17) are more preferable.

Examples of the alkyl group having 1 to 8 carbon atoms in R ⁶ and R ⁷ in the formula (17) include, for example, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, s-butyl, t-butyl, pentyl, hexyl, Examples thereof include a linear or branched alkyl group such as an octyl group. Of these, linear or branched alkyl groups having 1 to 4 carbon atoms such as methyl, ethyl, and propyl groups are preferable. Examples of the ring in which R ⁶ and R ⁷ are bonded to each other and bonded together with the adjacent carbon atom include, for example, a cyclobutane ring, a cyclopentane ring, a cyclohexane ring, etc. Examples include alkane rings.

  Specific examples of the monomer component m1 represented by the formula (2) include 2- [O- (1'-methylpropylideneamino) carboxyamino] ethyl methacrylate (= 2- (1-methylpropylideneamino). (Oxycarbonylaminoethyl) methacrylate) (represented by the following formula (18)), 2- (3,5-dimethylpyrazol-1-yl) carbonylaminoethyl methacrylate (represented by the following formula (19)) ) 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 .about.1 wt% to 99 wt% (for example, 10 wt% to 95 wt%), more preferably 20 wt% to 90 wt%, and more preferably 25 wt% to 88 wt%. % Or less is more preferable. 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 (20)) are particularly preferable.

  The content of the monomer component m2 in the polymer M is preferably 0.5 wt% or more and 98 wt% or less (for example, 2.5 wt% or more and 70 wt% or less), and is preferably 3 wt% or more and 50 wt% or less. More preferably, it is 5 wt% or more and 40 wt% or less. 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 (3) as a monomer component. The polymer M constituting the color filter ink may contain a plurality of monomer components m3 represented by the general formula (3) in the molecule.

  By containing such a monomer component m3 as a monomer component in the polymer M, the flatness of the colored portion formed using the color filter ink can be made high. Further, by containing the monomer component m3 as a monomer component in the polymer M, the discharge stability of the color filter ink can be made excellent. 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 and docosyl (behenyl) groups; 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 -Aralkyl groups, such as a phenyl hexadecyl group, etc. are mentioned.

  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); Aryloxy group such as phenoxy group; alicyclic hydrocarbon group-substituted oxy group such as cyclohexyloxy group and dicyclopentanyloxy group; and 1 to 15 carbon atoms such as aralkyloxy group such as benzyloxy group (preferably, And a hydrocarbon group-substituted oxy group having 1 to 12 carbon atoms.

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 16 or more and 25 or less, particularly preferably 16 or more and 22 or less, and more preferably 16 or more and 20 or less. Thereby, the effect mentioned above is exhibited more notably.

  The content of the monomer component m3 in the polymer M is preferably 0.5 wt% or more and 98 wt% or less (for example, 2.5 wt% or more and 70 wt% or less), and is preferably 3 wt% or more and 50 wt% or less. More preferably, it is 5 wt% or more and 40 wt% or less. When the content of the monomer component m3 in the polymer M is a value within the above range, the above-described effects are more prominent without inhibiting the functions of the monomer components m1, m2, and the like. Can be expressed. 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 m2 [wt%]} ) , it is preferable to satisfy the following relationship. That is, C _m1 / C _m2 is preferably 2/98 or more and 98/2 or less, more preferably 20/80 or more and 95/5 or less, and 40/60 or more and 95/5 or less. Further preferred.
Further, the ratio of monomer component m1 in polymer M ( _Cm1 [wt%]) and the ratio of monomer component m3 ( _Cm3 [wt%]) preferably satisfy the following relationship. . That is, C _m1 / C _m3 is preferably 2/98 or more and 98/2 or less, more preferably 20/80 or more and 95/5 or less, and 40/60 or more and 95/5 or less. Further preferred.
Examples of the polymer M include those represented by the following formula (21).

  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 (22) 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. It is preferable that: 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); Aryloxy group such as phenoxy group; alicyclic hydrocarbon group-substituted oxy group such as cyclohexyloxy group and dicyclopentanyloxy group; A hydrocarbon group-substituted oxy group having 1 to 12 carbon atoms).

  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 or more and 15 or less. However, it is particularly preferably 1 or more and 8 or less, and more preferably 1 or more and 4 or less. 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 (23).

(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 cyclic ether group of 3 to 5 members as a monomer component.
Monomer component m7 (vinyl compound having a cyclic ether group of 3 to 5 members) includes an oxirane ring (epoxy group) -containing polymerizable unsaturated compound, an oxetane ring (oxetanyl group) -containing polymerizable unsaturated compound, An oxolane ring (oxolanyl group) -containing polymerizable unsaturated compound is 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 includes the monomer component m7 as described above, a cyclic ether group having 3 to 5 members (oxirane ring (epoxy group), oxetane ring (oxetanyl group)) The oxolane ring (oxolanyl group)) acts as a curable group. The cyclic ether group having 3 to 5 members mainly contributes to improvement of chemical resistance (solvent resistance, alkali resistance, etc.).

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

  The weight average molecular weight of the polymer M is preferably 500 or more and 100,000 or less, more preferably 1000 or more and 40000 or less, and further preferably 2000 or more and 30000 or less. As a result, the contrast ratio and 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 colored portion to be formed, and the like of the color filter ink can be improved. In addition, the productivity of the color filter ink can be made particularly excellent when a manufacturing method as described later is used.

Further, the dispersity (weight average molecular weight Mw / number average molecular weight Mn) of the polymer M is preferably 1 or more and 3 or less.
The content _{C M} of the polymer M in the color filter ink is preferably less 0.5 wt% or more 12 wt%, and more preferably less than 1.0 wt% 9.0 wt%.

[Polymer W]
The polymer W includes a monomer component w1 represented by the following formula (24), a monomer component w2 represented by the following formula (25), and a monomer component w3 represented by the following formula (26): And a monomer component w4 represented by the following formula (27). Examples of the polymer W include those represented by the following formula (28).

  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 (24) 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 wt% or more and 75 wt% or less, and more preferably 40 wt% or more and 60 wt% or less. When the content of the monomer component w1 in the polymer W is a value within the above range, the above-described effects can be achieved without inhibiting the functions of the monomer components w2, w3, and w4 described in detail later. It can be expressed more significantly. 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 (25) 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 as described above can be made particularly excellent. As a result, the dispersion stability of the pigment, the color filter The long-term storability of the ink for use can be made particularly excellent.

  The content of the monomer component w2 in the polymer W is preferably 2 wt% or more and 25 wt% or less, and more preferably 5 wt% or more and 15 wt% or less. When the content of the monomer component w2 in the polymer W is a value within the above range, without inhibiting the functions of the monomer component w1 and the monomer components w3 and w4 described in detail later, The effects as described above can be expressed more remarkably. 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 (26) 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 improved.

  The content of the monomer component w3 in the polymer W is preferably 5 wt% or more and 50 wt% or less, and more preferably 10 wt% or more and 40 wt% or less. When the content of the monomer component w3 in the polymer W is a value within the above range, without inhibiting the functions of the monomer components w1, 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 (27) 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 wt% or more and 40 wt% or less, and more preferably 5 wt% or more and 30 wt% or less. When the content of the monomer component w4 in the polymer W is a value within the above range, the above-described effects are more remarkable without inhibiting the functions of the monomer components w1, w2, and w3. Can be expressed. 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 or more and 50000 or less, and more preferably 6000 or more and 15000 or less. As a result, it is possible to make the color filter ink stable over time (long-term storage stability), the discharge stability of the color filter ink, and the color filter productivity sufficiently. Furthermore, the flatness of the colored portion formed using the color filter ink can be made more reliable, and the occurrence of color unevenness or the like in the image displayed using the color filter can be more effectively achieved. Can be prevented.
Further, the dispersity (weight average molecular weight Mw / number average molecular weight Mn) of the polymer W is preferably 1 or more and 3 or less.

[Polymer Z]
The polymer Z includes a monomer component z1 represented by the following formula (29), a monomer component z2 represented by the following formula (30), and a monomer component z3 represented by the following formula (31): Is included. Examples of the polymer Z include those represented by the following formula (32).

  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 dispersed (pulverized) more easily, 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 (29) 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 wt% or more and 95 wt% or less, and more preferably 60 wt% or more and 85 wt% or less. When the content of the monomer component z1 in the polymer Z is a value within the above range, the above-described effects are more prominent without inhibiting the functions of the monomer components z2 and z3 described in detail later. Can be expressed. 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 (30) 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 storability of the ink for use can be made particularly excellent.

  The content of the monomer component z2 in the polymer Z is preferably 3 wt% or more and 35 wt% or less, and more preferably 10 wt% or more and 25 wt% or less. When the content of the monomer component z2 in the polymer Z is a value within the above range, the above-described monomer component z1 and the above-described monomer component z3 described in detail later are not 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 (31) 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 wt% or more and 30 wt% or less, and more preferably 5 wt% or more and 20 wt% or less. When the content of the monomer component z3 in the polymer Z is a value within the above range, the above-described effects are more remarkably exhibited without inhibiting the functions of the monomer components z1 and z2. Can be made. 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 or more and 50000 or less, and more preferably 6000 or more and 15000 or less. As a result, it is possible to make the color filter ink stable over time (long-term storage stability), the discharge stability of the color filter ink, and the color filter productivity sufficiently. Furthermore, the flatness of the colored portion formed using the color filter ink can be made more reliable, and the occurrence of color unevenness in the image displayed using the color filter can be more effectively achieved. Can be prevented.

Further, the dispersity (weight average molecular weight Mw / number average molecular weight Mn) of the polymer Z is preferably 1 or more and 3 or less.
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.

Further, the content of the resin material in the color filter ink is preferably 0.5 wt% or more and 18 wt% or less, more preferably 1 wt% or more and 15 wt% or less, and 3 wt% or more and 10 wt% or less. Is more preferable.
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 etc. of the produced color filter can be made more excellent, or even when the colored portion thickness is made thinner, a sufficient contrast ratio and Brightness can be ensured.
The resin material constituting the color filter ink may include a resin component other than those described above or a precursor thereof.
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. In addition, since the dispersion stability of the pigment in the color filter ink is particularly excellent, even in the produced color filter, the pigment is uniformly finely dispersed in the colored part, and the contrast ratio and brightness of the colored part Will be 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 an acid value dispersant and an amine value dispersant are used in combination, the acid value of the acid value dispersant (acid value when converted to solid content) is not particularly limited, but is 5 KOHmg / g or more and 370 KOHmg / g or less. Is more preferably 20 KOH mg / g or more and 270 KOH mg / g or less, and further preferably 30 KOH mg / g or more and 135 KOH mg / g or less. When the acid value of the acid value 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. In this case, the effect of reducing and stabilizing the viscosity of the color filter ink can be obtained more remarkably. Further, 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 5 KOHmg / g or more and 200 KOHmg / g or less. Is more preferably 25 KOHmg / g or more and 170 KOHmg / g or less, and further preferably 30 KOHmg / g or more and 130 KOHmg / g or less. When the amine value of the amine value dispersant is 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 pigment dispersion stability in the color filter ink is excellent. In particular, the droplet discharge stability and the like can be made particularly excellent. Further, the brightness and contrast ratio of the colored portion to be formed can be made sufficiently high.

The acid value of the acid value dispersant is AV [KOH mg / g], the amine value of the amine value dispersant is BV [KOH mg / g], the content of the acid value dispersant is X _A [wt%], and the amine When the content of the valent dispersant is X _B [wt%], it is preferable that the relationship of 0.01 ≦ (AV × X _A ) / (BV × X _B ) ≦ 1.9 is satisfied, and 0.10 _{≦ (AV × X a) /} (BV × X B) is more desirable to satisfy the relation of ≦ 1.5. 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 pigment dispersion stability in the color filter ink is excellent. In particular, the droplet discharge stability and the like can be made particularly excellent. Further, the brightness and contrast ratio of the colored portion to be formed can be made sufficiently high.
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 wt% or more and 15 wt% or less, and more preferably 0.5 wt% or more and 8 wt% or less.

<Other ingredients>
The color filter ink of the present invention may contain components other than those described above. Examples of such components include various crosslinking agents; thermal acid generators such as diazonium salts, iodonium salts, sulfonium salts, phosphonium salts, selenium salts, oxonium salts, ammonium salts, onium salts such as benzothiazolium salts; Photoacid generators such as diazonium salts, iodonium salts, sulfonium salts, phosphonium salts, selenium salts, oxonium salts, ammonium salts; various polymerization initiators; acid crosslinking agents; surfactants; sensitizers; light stabilizers; ; Leveling agent; Antioxidant; UV absorber; Adhesion improver; Various polymerization accelerators; Various light stabilizers; Fillers such as glass and alumina; Vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2- Methoxyethoxy) silane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2- ( 3,4-epoxycyclohexyl) adhesion promoters such as ethyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane; Antioxidants such as 2,2-thiobis (4-methyl-6-t-butylphenol) and 2,6-di-t-butylphenol; 2- (3-t-butyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotriazole, alkoxybenzophenone UV absorbers; anti-agglomeration agent such as sodium polyacrylate, 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 color filter ink contains a leveling agent, the colored portion to be formed becomes flatter and the brightness and contrast ratio become higher. In particular, when the color filter ink includes the resin material as described above, the effect of the resin material as described above that maintains fluidity with low viscosity over a long period of time and the effect of the leveling agent that reduces the surface tension of the ink are synergistic. The surface of the ink in the cell becomes flatter.

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

The antioxidant can prevent deterioration of the color filter ink due to oxidation or the like, and can prevent deterioration of the colorant or resin material due to heat, light, or the like in the colored portion formed by the color filter ink.
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 viscosity at 25 ° C. of the color filter ink (viscosity measured using a vibration viscometer) is not particularly limited, but is preferably 4 mPa · s or more and 10 mPa · s or less, preferably 5 mPa · s or more and 9.5 mPa · s. -More preferably, it is s or less. 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 is C.I. I. Pigment Blue 15: 6 pigment is atomized in a mixture containing the pigment and Dye A to obtain a colorant containing the atomized pigment, and a mixture containing a dispersant and a liquid medium A pre-dispersing step for obtaining a dispersant dispersion in which the dispersant is dispersed in a liquid medium by stirring, adding the colorant to the dispersant dispersion, and adding inorganic beads in multiple stages for fine dispersion A fine dispersion step of performing a treatment to obtain a pigment dispersion, and a mixing step of mixing the pigment dispersion and a resin material such as the polymer X.

<Atomization process>
In the atomization step, C.I. I. The pigment containing Pigment Blue 15: 6 is atomized (milled) in a mixture (colorant mixture) containing the pigment and Dye A to obtain a colorant containing the atomized pigment. Thus, C.I. I. When the pigment is atomized in a mixture containing Pigment Blue 15: 6 and Dye A, Dye A easily adheres to the pigment particle surface of the pigment. As a result, the once-pulverized pigment particles are prevented from agglomerating, and the pigment particles are suitably atomized. In addition, in the manufactured color filter ink, the dispersion stability of the pigment particles is particularly excellent.

In particular, when the above-described dye A1 is used as the dye A, the dye A1 is relatively stable against heat and mechanical force, and thus hardly deteriorates in this step and the fine dispersion step described later.
Further, since the pigment is usually in the form of a lump at the time of production, it is necessary to atomize the pigment to obtain a pigment having a particle diameter as described above, and this step is provided.
In this step, the atomization of the pigment particles can be performed by a method of applying a mechanical force to the colorant mixture. For example, the pigment and the salt are mixed to obtain a mixture, and the mixture is kneaded to obtain the pigment. A salt milling method for obtaining fine particles, a solvent milling method for mixing pigments and a solvent to obtain a mixture, and kneading the mixture to obtain fine particles of the pigment can be used.

In this embodiment, a salt milling method will be described.
In this step, first, C.I. I. A colorant mixture is prepared containing a pigment containing Pigment Blue 15: 6, Dye A, a salt, and a solvent.
Examples of the salt that can be used in this step include various water-soluble inorganic salts such as NaCl, KCl, calcium chloride, zinc chloride, sodium sulfate, and potassium sulfate. Among these, one or a combination of two or more types can be used. Can be used. Such an inorganic salt can suitably promote the pulverization of the pigment, and is preferably removed from the colorant mixture by washing the colorant mixture after atomization with a polar solvent such as water. It is difficult to affect the composition of the color filter ink.

The solvent contained in the colorant mixture functions as a wetting agent for the colorant mixture, and uniformizes the degree of pulverization (kneading) at each part of the colorant mixture during atomization.
Although it does not specifically limit as a solvent, For example, the organic solvent (water-soluble organic solvent) which has water solubility can be used. Thus, when the solvent is water-soluble, the solvent is easily removed by washing the colorant mixture after atomizing the pigment.
Moreover, as a solvent, it is preferable that it is a comparatively high boiling point (for example, 100 degreeC or more). Heat is easily generated during the atomization of the pigment, but the solvent has a relatively high boiling point, so that the solvent can be prevented from volatilizing during the atomization of the pigment.

  The solvent that can be used in this step is not particularly limited as long as it has the functions described above. Specifically, a water-soluble organic solvent can be used, for example, methanol, ethanol, isopropanol, n- Propanol, isobutanol, n-butanol, 2- (methoxymethoxy) ethanol, 2-butoxyethanol, 2- (isopentyloxy) ethanol, 2- (hexyloxy) ethanol, 1-methoxy-2-propanol, 1-ethoxy Alcohols such as 2-propanol and dipropylene glycol; ethylene glycol, propylene glycol, diethylene glycol, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol Alkylene glycol or polyalkylene glycols such as dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, propylene glycolic monomethyl ether acetate, triethylene glycol monomethyl ether, etc. Ether or polyalkylene glycol alkyl ether; glycerin, polyglycerin, aniline, pyridine, tetrahydrofuran, dioxane, ethyl acetate, isopropyl acetate, acetone, methyl ethyl ketone, dimethylformamide, dimethyl sulfoxide, N-methylpyrrolidone, etc. Can be used alone or in combination of two or more .

Moreover, as a solvent, you may have a water-insoluble solvent. In this case, by setting the ratio of the combination to an appropriate ratio, in washing after atomization, it remains appropriately in the colored mixture after washing, thereby aggregating pigment particles in the subsequent fine dispersion step. The effect of loosening (breaking) can be made stronger.
The content of the water-insoluble solvent in the solvent is preferably 5 wt% or less, and more preferably 0.1 wt% or more and 1 wt% or less. Thereby, a salt can be removed efficiently in a washing | cleaning process, and said effect can be acquired. In particular, when a liquid similar to the liquid medium of the color filter ink is used as the water-insoluble solvent, it is preferable because the compatibility with each material in the subsequent mixing step is excellent.

The colorant mixture may contain other components such as a dispersant.
In preparing the colorant mixture, the solvent and the pigment are preferably mixed after the solvent and the dye A are mixed. Thereby, the pigment and the dye A in the colorant mixture are more likely to be present more uniformly.
The solid content (colorant, salt, etc.) content in the colorant mixture is preferably 30 wt% or more, and more preferably 30 wt% or more and 99.5 wt% or less. Thereby, kneading is efficiently performed at the time of atomization, and the atomization of the pigment proceeds.

Next, by applying mechanical force to the obtained colorant mixture, kneading is performed and the pigment is atomized.
The atomization apparatus that can be used for such atomization is not particularly limited, and examples thereof include a pressure kneader and a double kneader.
After the atomization of the pigment, the colorant mixture may be used as it is in the fine dispersion step described later, or the colorant containing the atomized pigment and dye A is purified (washed), and the colorant May be used in the fine dispersion step described later, but it is preferable to purify the colorant.

  When the color filter ink contains a large amount of salt, the reliability of the color filter formed using the color filter ink may be deteriorated. In particular, in the case where a transparent electrode such as indium tin oxide is directly formed without forming a protective film on the color filter, when the liquid crystal panel (liquid crystal display device) is used for a long time, the color filter component May ooze out from the pinhole of the transparent electrode and may be mixed into the liquid crystal in a small amount. In such a case, the voltage holding ratio of the liquid crystal is liable to decrease, and as a result, the pixel of the liquid crystal display device is poorly lit, affecting the long-term reliability of the liquid crystal panel (liquid crystal display device).

In this embodiment, the colorant mixture after atomization is washed to remove the salt and solvent to obtain a colorant.
The colorant mixture is washed by, for example, dispersing the colorant mixture in a polar solvent such as water, dissolving the salt and solvent in the polar solvent, and removing the polar solvent by filtration or the like. be able to. Thereby, the colorant from which the salt and the solvent have been suitably removed from the colorant mixture is obtained. The obtained colorant is a cake-like solid in which finely divided pigments are aggregated.

The dye A as described above is preferably C.I. I. Since it is attached (adsorbed) to CI Pigment Blue 15: 6, it is difficult to be removed from the colorant mixture by the above washing treatment.
Further, this cleaning process may be repeated.
Moreover, you may perform a drying process with respect to the coloring agent after washing | cleaning. Thereby, a polar solvent, a solvent, etc. can be removed more reliably. As the drying treatment, for example, various drying treatments such as warm air drying, heat drying, air drying, and vacuum drying can be used.

<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 dispersant in the dispersant dispersion prepared in this step (the sum of the content when a plurality of types of dispersants are included) is not particularly limited, but is 10 wt% or more and 40 wt% or less. Preferably, it is 12 wt% or more and 32 wt% or less. 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 is 10 wt. % Or more and 40 wt% or less is preferable, and 12 wt% or more and 32 wt% or less is more preferable. 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 to 80 wt%, and it is more preferable that it is 53 to 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), A liquid medium having a desired composition can be obtained in the finally obtained color filter ink by substituting a liquid (solvent) accompanied by a decompression treatment, a heat treatment or the like.

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.
The stirring time using the stirrer is not particularly limited, but is preferably 1 minute or longer and 30 minutes or shorter, and more preferably 3 minutes or longer and 20 minutes or shorter.

Moreover, the rotation speed of the stirring blade of the stirrer in this step is not particularly limited, but is preferably 500 rpm or more and 4000 rpm or less, and more preferably 800 rpm or more and 3000 rpm or less.
In addition, this process may be performed prior to the atomization process or may be performed simultaneously with the atomization process.

<Fine dispersion process>
Next, a colorant is added to the dispersant dispersion obtained in the above step, and inorganic beads are added in multiple stages for fine dispersion treatment (fine dispersion step).
The colorant containing the finely divided pigment is a cake-like solid in which the pigment is agglomerated. Therefore, in this step, the agglomeration of the pigment particles is loosened (pulverized) and the fine pigment is obtained. A pigment dispersion in which the particles are dispersed is obtained.

  As described above, in this embodiment, prior to the addition of the colorant, 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). In the fine dispersion step, the efficiency of fine dispersion of the pigment can be improved by adding inorganic beads in multiple stages. The color filter ink finally obtained in this way is very excellent in pigment dispersion stability and droplet ejection stability, and manufactures color filters with excellent brightness and contrast. It can be used for.

  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 colorant is added to the dispersant dispersion prepared in the preliminary dispersion step described above, and a first treatment is performed for primary fine dispersion 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 mm or more and 3.0 mm or less, more preferably 0.5 mm or more and 2.0 mm or less, and 0.5 mm or more and 1 mm or less. More preferably, it is 2 mm or less. When the average particle diameter of the first inorganic beads is within the above range, the efficiency of fine dispersion of the pigment as the 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 parts by weight or more and 600 parts by weight or less, and 200 parts by weight or more and 500 parts by weight or less with respect to 100 parts by weight of the dispersant dispersion. Is more preferable.
The amount of the pigment added to the dispersant dispersion is not particularly limited, but it is preferably 12 parts by weight or more, and 18 parts by weight or more and 35 parts by weight or less with respect to 100 parts by weight of the dispersant dispersion. More preferred.

The first treatment can be performed by stirring with various stirrers in a state where the colorant 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 minutes or longer and 120 minutes or shorter, and more preferably 15 minutes or longer and 40 minutes or shorter.
Moreover, the rotation speed of the stirring blade of the stirrer in the first treatment is not particularly limited, but is preferably 1000 rpm or more and 5000 rpm or less, and more preferably 1200 rpm or more and 3800 rpm or less.

[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 finely dispersed.
The average particle size of the second inorganic beads is not particularly limited, but is preferably 0.03 mm or more and 0.3 mm or less, and more preferably 0.05 mm or more and 0.2 mm or less. 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.

The amount of the second inorganic beads used is not particularly limited, but is preferably 100 parts by weight or more and 600 parts by weight or less, and 200 parts by weight or more and 500 parts by weight or less with respect to 100 parts by weight of the dispersant dispersion. Is more preferable.
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 minutes to 120 minutes, and more preferably 15 minutes to 40 minutes.
Moreover, the rotation speed of the stirring blade of the stirrer in the second treatment is not particularly limited, but is preferably 1000 rpm or more and 5000 rpm or less, and more preferably 1200 rpm or more and 3800 rpm or less.

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 color filter ink such as the polymer X (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 minute to 60 minutes and more preferably 15 minutes to 40 minutes.

Moreover, the rotation speed of the stirring blade of the stirrer in this step is not particularly limited, but is preferably 1000 rpm to 5000 rpm, and more preferably 1200 rpm 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.

In this step, a dye other than the dye A and other components of the color filter ink can be appropriately mixed with the pigment dispersion.
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, an ink set includes the color filter ink of the present invention and another color ink (color filter ink). C. I. The color filter ink of the present invention containing Pigment Blue 15: 6 is usually used for forming a blue 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 green 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 (blue color filter ink) of the present invention 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. When the compound of Pigment Red 254 contains a compound (derivative) represented by the following formula (33) or the following formula (34), the effects described above are more remarkably exhibited.

  In the case where the ink set is provided with a green color filter ink (G ink) in addition to the color filter ink (blue color filter ink) of the present invention as described above, the G ink is a colorant. As C.I. I. It is preferable that it contains a pigment green 58 and a pigment derivative represented by the following formula (35). Thereby, the color developability of the G 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.

  Moreover, it is preferable that the composition of R ink and G ink contains the same kind of material as B ink except a coloring agent. In particular, when the R ink and the G ink contain the polymer M as described above, the R ink and the G 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 12C 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. Further, the colored portion 12C is excellent in brightness and contrast ratio because the pigment is suitably finely dispersed.

<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 μm or more and 10 μm or less, and more preferably 0.5 μm or more and 3.5 μm or less. 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 ° C. or higher and 150 ° C. or lower, heating time: 30 seconds or longer and 600 seconds or shorter.

Then, the partition 13 is formed by performing a post-exposure baking process (PEB) by irradiating with a radiation through a photomask, and further performing a developing process using an alkaline developer (1c). PEB can be performed, for example, under conditions of heating temperature: 50 ° C. or more and 150 ° C. or less, heating time: 30 seconds or more and 600 seconds or less, and radiation irradiation intensity: 1 mJ / cm ² or more and 500 mJ / cm ² or less. 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 seconds 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 ° C. or higher and 280 ° C. or lower and heating time: 3 minutes or longer and 120 minutes or shorter.

<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 blue ink (B ink) of the color filter ink 2 is excellent in the dispersion stability of the pigment and has a relatively low viscosity, and thus is excellent in the droplet ejection stability. 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 the occurrence of problems such as color mixing, color unevenness / density unevenness, contrast ratio, and brightness reduction 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 micrometers or more and 90 micrometers or less. 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 this embodiment, 90 nozzles 118 are arranged in a line in the X-axis direction at a constant interval LNP in each of the nozzle array 116A and the nozzle array 116B. Although the specific value of LNP is not specifically limited, it can be 100 μm or more and 180 μm or less.

The position of the nozzle row 116B is shifted from the position of the nozzle row 116A by a half length of the nozzle pitch LNP in the positive direction in the X-axis direction (right direction in FIG. 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).
Therefore, 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 linear 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 ° C. or higher and 280 ° C. or lower, and more preferably 110 ° C. or higher and 250 ° C. or lower. Thereby, the curing reaction of the resin material can be efficiently advanced while preventing the unintentional deterioration / decomposition of the constituent material of the colored portion 12, and the liquid medium can be suitably removed from the color filter ink 2.

Moreover, the heating time in this step is not particularly limited, but is preferably 30 minutes or longer and 190 minutes or shorter, and more preferably 40 minutes or longer and 130 minutes or shorter.
In this step, a plurality of heat treatments with different temperatures may be performed. Specifically, in this step, a first heat treatment that heats the substrate 11 at a relatively low temperature and a second heat treatment that heats the substrate 11 at a temperature higher than the first heat treatment are performed. May be.
As a result, unintentional deterioration / decomposition of the constituent material of the colored portion 12 is prevented, the productivity of the color filter 1 is improved, and the liquid medium remains in the formed colored portion 12. Can be prevented.

Further, in this step, by performing a first heat treatment for heating the substrate 11 at a relatively low temperature and a second heat treatment for heating the substrate 11 at a temperature higher than the first heat treatment, The flatness of the surface of the coloring part 12 can be made higher.
In such a case, by heating the substrate 11 at a relatively low temperature in the first heat treatment, the liquid medium is gently removed while preventing the convection of the color filter ink 2, and the color filter ink 2. The fluidity can be lost or reduced 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, when the first heat treatment and the second heat treatment are performed in this step, the treatment temperature in the first heat treatment (the temperature of the heated substrate 11) is not particularly limited, but is 30 ° C. The temperature is preferably 100 ° C. or lower and more preferably 40 ° C. or higher and 80 ° C. or lower. Thus, the liquid medium can be suitably removed from the color filter ink 2 while reliably preventing convection of the color filter ink 2.

The time for the first heat treatment is not particularly limited, but is preferably 3 minutes or longer and 50 minutes or shorter, and more preferably 5 minutes or longer and 40 minutes or shorter.
The treatment temperature in the second heat treatment (the temperature of the heated substrate 11) is not particularly limited, but is preferably 120 ° C. or higher and 280 ° C. or lower, and more preferably 150 ° C. or higher and 250 ° C. or lower. preferable. Thereby, the liquid medium which could not be removed by the first heat treatment can be completely removed. 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 minutes or more and 150 minutes or less, and more preferably 30 minutes or more and 100 minutes or less.

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, the colored portion 12C is formed using the color filter ink 2 of the present invention, and therefore, variation in characteristics among pixels is suppressed. As a result, in the liquid crystal display device 60, color unevenness, density unevenness, and the like at each portion are suppressed, and an image with excellent 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 three kinds of color filter inks corresponding to the three primary colors of light has been mainly described. The number and type (color) of ink 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. , Monomer component (compound) represented by formula (4) x1: 164 parts by weight, monomer component (compound) represented by formula (5) x2: 23 parts by weight, formula (6) A solution in which 23 parts by weight of a monomer component (compound) represented by formula (2) and 2,2′-azobis (isobutyronitrile) (AIBN): 50 parts by weight are dissolved in 200 parts by weight of diethylene glycol monobutyl ether acetate. 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 6)
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, five types of polymers (polymers X2 to X6) were obtained. Each monomer component was used in the synthesis so that the total amount was 300 parts by weight.

(Synthesis Example 7)
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 Y1 represented by the said Formula (16) including the monomer component y1.

(Synthesis Example 8)
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 (21). A polymer M1 as a combined M was obtained.
(Synthesis Examples 9 to 15)
The same operation as in Synthesis Example 8 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 16)
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 (24) and the monomer component (compound) w2: 34 weight represented by the above formula (25) in the flask. Parts: monomer component (compound) w3: 74 parts by weight represented by the above formula (26), monomer component (compound) w4: 74 parts by weight represented by the above formula (27), as radical initiator A solution prepared by dissolving 64 parts by weight of azobisdimethylvaleronitrile in 386 parts by weight of diethylene glycol monobutyl ether acetate was added dropwise over 5 hours using a dropping pump, and further aged for 3 hours. Then, it cooled to room temperature and obtained the polymer W1 as the polymer W represented by the said Formula (28) including the monomer components w1, w2, w3, and w4.
(Synthesis Examples 17 and 18)
The same operation as in Synthesis Example 16 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 19)
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 placed and heated to 80 ° C. Subsequently, in the flask, the monomer component (compound) represented by the formula (29) z1: 276 parts by weight, the monomer component (compound) represented by the formula (30) z2: 51 weights. A solution prepared by dissolving 39 parts by weight of azobisdimethylvaleronitrile as a radical initiator in 360 parts by weight of diethylene glycol monobutyl ether acetate was added dropwise using a dropping pump over 5 hours, and further aged for 3 hours.
Thereafter, 26 parts by weight of glycidyl methacrylate and 2 parts by weight of methoquinone were added to the flask and reacted at 110 ° C. for 10 hours. Then, it cooled to room temperature and obtained the polymer Z1 as the polymer Z represented by the said Formula (32) including the monomer components z1, z2, and z3.
(Synthesis Examples 20 and 21)
The same operation as in Synthesis Example 19 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 1-21, and the weight average molecular weight Mw of each polymer were shown collectively. In Table 1, 2- [O- (1′-methylpropylideneamino) carboxyamino] ethyl methacrylate (= 2- (1-methylpropylideneaminooxycarbonylaminoethyl) methacrylate) is represented by “m1a”, The acid 2- (3,5-dimethylpyrazol-1-yl) carbonylaminoethyl is indicated by “m1b” and the acid 2- (3,5-dimethylpyrazol-1-yl) carbonylaminoethyl is indicated by “m1c”. Methacrylic acid is indicated by “m2a”, acrylic acid is indicated by “m2b”, stearyl methacrylate is indicated by “m3a”, behenyl methacrylate is indicated by “m3b”, palmityl acrylate is indicated by “m3c”, and lignoceryl methacrylate Is indicated by “m3d”, methyl methacrylate is indicated by “m4a”, Ethyl acid is indicated by “m4b”, pentyl acrylate is indicated by “m4c”, styrene is indicated by “m5”, 2-hydroxyethyl methacrylate is indicated by “m6”, and 3,4-epoxytricyclo [5.2 A mixture of .1.0 ^2,6 ] decan-9-yl acrylate and 3,4-epoxytricyclo [5.2.1.0 ^2,6 ] decan-8-yl acrylate is indicated by “m7”. In the table, “S” means a solvent (solvent), in particular, “S1” indicates diethylene glycol monobutyl ether acetate, and “S2” indicates 1,3-butylene glycol diacetate. , “S3” represents 2- (2-methoxy-1-methylethoxy) -1-methylethyl acetate, “S4” represents ethylene glycol monobutyl ether acetate, and “S5” represents ethyl octanoate. "S6" indicates tripropylene glycol dimethyl ether. 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. In addition, the polymers synthesized as described above each had a dispersity (weight average molecular weight Mw / number average molecular weight Mn) of 1 or more and 3 or less.

[2] Preparation of color filter ink (color filter ink set) (Example 1)
First, the dye A1 represented by the formula (7), ethylene glycol as a solvent, C.I. I. Pigment Blue 15: 6 and KCl as a salt were mixed to obtain a colorant mixture.
Next, a pigment mixture was kneaded by using a twin-type kneader (manufactured by Toshin Co., Ltd.) to atomize the pigment particles (atomization step).

Next, the coloring agent mixture after atomization of the pigment was subjected to a washing treatment and a drying treatment to obtain a coloring agent. The water washing treatment was performed by repeating the dispersion of the colorant mixture in water and filtering the water with a filter. Moreover, the drying process was performed by air-drying at normal temperature.
Next, Dispersic 111 as an acid value dispersant, Dispersic 166 as an amine value dispersant, Polymer M1, and diethylene glycol monobutyl ether acetate as a liquid medium were mixed with a stirrer (uniaxial mixer) having a content of 400 cc. ) And stirred for 10 minutes with a disper mill to perform preliminary dispersion, thereby obtaining 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 colorant was added to the dispersant dispersion obtained in the preliminary dispersion step, and inorganic beads were added in multiple stages to perform fine dispersion treatment.
First, a colorant 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. At this time, the mixture was diluted with diethylene glycol monobutyl ether acetate as a liquid 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. At this time, the pigment dispersion was diluted with diethylene glycol monobutyl ether acetate as a liquid medium so that the pigment content in the obtained pigment dispersion was 13 wt%.

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, the polymer X1 and diethylene glycol monobutyl ether acetate and diethylene glycol mononormal butyl ether as a liquid medium were added to the pigment dispersion obtained as described above 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 blue color filter ink (B ink) was obtained. The content ratio of the colorant in the obtained B ink was 4.9 wt%.

  In addition, the color filter ink (R ink) and the green color filter ink (G ink) are the same as the blue color filter ink except that the type of pigment and the amount of each component used are changed. Was prepared. As a result, an ink set composed of three colors of R, G, and B was obtained. The average particle diameter of the pigment constituting the R ink, the average particle diameter of the pigment constituting the G ink, and the average particle diameter of the pigment constituting the B ink were 70 nm, 70 nm, and 70 nm, respectively. The average particle diameter of the pigment was measured using Microtrac UPA-9230 (manufactured by NIKKISO). Further, as a colorant for R ink, C.I. I. A mixture of Pigment Red 177 and the pigment derivative represented by the above formula (33); I. Pigment Red 254 and a mixture of the pigment derivative represented by the above formula (34), and a powder of a pigment derivative (the number of sulfo groups in the molecule is 1) having the chemical structure represented by the above formula (35). The colorant content in the final R ink was 7.9 wt%. In addition, C.I. I. The content of the pigment derivative represented by the formula (33) in the mixture of Pigment Red 177 and the pigment derivative represented by the formula (33) was 0.1 wt% or more and 10 wt% or less. In addition, C.I. used in the above Examples and Comparative Examples. I. The content of the pigment derivative represented by the formula (34) in the mixture of Pigment Red 254 and the pigment derivative represented by the formula (34) was 0.1 wt% or more and 10 wt% or less. Examples of the colorant for G ink include C.I. I. Pigment Green 58 and the pigment derivative represented by the above formula (35) were used, and the content of the colorant in the final G ink was 10.1 wt%.

(Examples 2 to 13)
The same as in Example 1 except that the production conditions of the color filter ink were changed as shown in Tables 2 to 4 and the material type and content of the color filter ink were changed as shown in Table 5. A color filter ink (B ink) was prepared. The R ink and the G ink were manufactured using the same pigments as in Example 1 and the other materials using the same materials as the B inks of each Example.

(Comparative Examples 1 and 2)
The same as in Example 1 except that the production conditions of the color filter ink were changed as shown in Tables 2 to 4 and the material type and content of the color filter ink were changed as shown in Table 5. A color filter ink (B ink) was prepared. The R ink and the G ink were manufactured using the same pigments as in Example 1 and the other materials using the same materials as the B inks of each Example.

In Comparative Example 2, an attempt was made to make fine particles without using the dye A. However, in the fine dispersion step, the viscosity of the pigment dispersion becomes too high, and the obtained color filter ink cannot be used after being gelled. Met.
In each of the above Examples and Comparative Examples, all of the polymers M, W, and Z and the thermoplastic resin R are used in the preliminary dispersion step, and the polymers X and Y are used in the mixing step. It was.

The composition of the colorant mixture in the atomization step in each of the examples and the comparative examples is shown in Table 2, the composition of the dispersant dispersion is shown in Table 3, various conditions of the fine dispersion step are shown in Table 4, and the color filter ink Table 5 summarizes the types and contents of the components. In the table, C.I. I. Pigment Blue 15: 6 is “PB15: 6”, the dye A1 represented by the above formula (7) is “A1”, the dye A represented by the above formula (8) is “A2”, and the above formula (13) is used. Dye A is "A3", ethylene glycol is "E", glycerin is "G", SPCN-17X (made by Showa Polymer Co., Ltd.) as a thermoplastic resin is "R", Dispersic 111 (acid value: 50 KOHmg / g) ) “DA1”, Dispersic 2095 (acid value: 13 KOHmg / g) “DA2”, Dispersic P104 (acid value: 360 KOHmg / g) “DA3”, Dispersic 166 (amine value: 115 KOHmg / g) “DA4” and Dispersic 9075 (amine value: 12 KOH mg / g) are indicated by “DA5”. The liquid medium is shown in the same manner as in Table 1. Further, diethylene glycol mononormal butyl ether is “S7”, triethylene glycol mononormal butyl ether is “S8”, ethyl 3-ethoxypropionate is “S8”, dipropylene. Glycol dimethyl ether is indicated by “S10”, and 3-methoxybutyl acetate is indicated by “S11”. In the table, C.I. I. The content ratio of Pigment Blue 15: 6 is represented by X _PB [wt%], and the content ratio of Dye A is represented by X _DA [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 color filter ink [3.1] Landing position accuracy Blue color of the droplet discharge device as shown in FIG. 3 to FIG. 6 installed in the chamber (thermal chamber), and the respective examples and comparative examples The ink for color filter (B ink) was prepared, and the drive waveform of the piezo element was optimized in an environment of 27 ° C. and 30% RH. Continuous ejection of droplets (100,000 droplets) was performed. 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 Droplet discharge device as shown in FIGS. 3 to 6 installed in a chamber (thermal chamber), blue color filter ink (B ink) of each of the above examples and comparative examples The B ink constituting the color filter ink set was discharged by continuously operating the droplet discharge device for 72 hours in an environment of 27 ° C. and 30% 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 blue color filter inks (B inks) of the above examples and comparative examples were allowed to stand for 50 days in a 55 ° C. environment and then visually observed. Evaluation was performed according to the criteria of
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.

[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 2.0 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, 20 color filters were produced using the color filter inks (ink sets) of each Example and each Comparative Example.

[5] Evaluation of color filter The following evaluation was performed using each color filter obtained as described above.
[5.1] Color unevenness and density unevenness Among the color filters manufactured using the color filter inks (ink sets) of the respective Examples and Comparative Examples, the color filters manufactured on the 10th 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 blue single color display and a white single color display, 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.

[6] Evaluation of contrast ratio A soda glass substrate having a silica (SiO ₂ ) film that prevents elution of sodium ions on both sides using the blue color filter ink of each of the examples and comparative examples. The color filter ink is applied on the surface by spin coating, and the color filter ink is heat-treated (first heat treatment and second heat treatment) in the same manner as in [4] above. : A 2.0 μm blue coating film was obtained.
Next, using the contrast tester (CT-1, manufactured by Aisaka Denki Co., Ltd., using a halogen lamp as the light source), the contrast ratio (CR) is determined and evaluated according to the following five-stage criteria. Went.

A: CR is 3500 or more.
B: CR is 3300 or more and less than 3500.
C: CR is 3000 or more and less than 3300.
D: CR is 2500 or more and less than 3000.
E: CR is less than 2500.

[7] Evaluation of brightness The following evaluation was performed on the coating film provided on the substrate formed in [6]. Using a chromaticity meter (manufactured by Minolta, CM-3700d, using C light source as a light source), tristimulus values were determined by the xyY colorimetric method for blue light transmitted through the coating film, and when y = 0.141 The Y value of blue light was evaluated according to the following five-step criteria.

A: Brightness Y is 11.8 or more.
B: The brightness Y is 11.3 or more and less than 11.8.
C: Brightness Y is 10.8 or more and less than 11.3.
D: The brightness Y is 10.0 or more and less than 10.8.
E: Lightness Y is less than 10.0.
These results are shown in Table 6.

As is clear from Table 6, in the present invention, the color filter ink was excellent in droplet ejection stability. As a result, in the color filter manufactured using the color filter ink of the present invention, density unevenness and color unevenness at each part were suppressed. Moreover, the blue coating film manufactured using the color filter ink of the present invention was excellent in brightness and contrast ratio.
On the other hand, in each comparative example, a satisfactory result was not 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 (12)

A color filter ink used in the production of an ink jet color filter,
C. I. A color filter ink comprising: a pigment containing CI Pigment Blue 15: 6; and a dye A represented by the following formula (1).

The content of the dye A in the color filter ink is X _DA [wt%], the C.I. I. The color filter ink according to claim 1, wherein a relation of 0.01 ≦ X _DA / X _PB ≦ 0.40 is satisfied, where X _PB [wt%] is a content ratio of Pigment Blue 15: 6.   The color filter ink according to claim 1, further comprising an acid value dispersant having a predetermined acid value and an amine value dispersant having a predetermined amine value. The acid value of the acid value dispersant is AV [KOH mg / g], the amine value of the amine value dispersant is BV [KOH mg / g], the content of the acid value dispersant is X _A [wt%], the amine The color according to claim 3, wherein the content of the valent dispersant is X _B [wt%], and satisfies the relationship of 0.01 ≦ (AV × X _A ) / (BV × X _B ) ≦ 1.9. Filter ink. Furthermore, the weight includes a monomer component m1 represented by the following formula (2), a monomer component m2 having a carboxyl group or an acid anhydride group, and a monomer component m3 represented by the following formula (3). The color filter ink according to claim 1, comprising the coalescence M.

Furthermore, the weight 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). The color filter ink according to any one of claims 1 to 5, comprising the coalescence X.

Furthermore, a liquid medium for dispersing the pigment is included,
The liquid medium is 1,3-butylene glycol diacetate, ethylene glycol monobutyl ether acetate, 2- (2-methoxy-1-methylethoxy) -1-methylethyl acetate, diethylene glycol monobutyl ether acetate, tripropylene glycol dimethyl ether and The color filter ink according to claim 1, comprising one or more selected from the group consisting of ethyl octoate.   8. The color filter ink according to claim 1, wherein the pigment is atomized in a mixture containing the pigment and the dye A. 9.   A color filter manufactured using the color filter ink according to claim 1.   An image display device comprising the color filter according to claim 9.   The image display device according to claim 10, wherein the image display device is a liquid crystal panel.   An electronic apparatus comprising the image display device according to claim 10.

Images