JP2011133610A - Color filter ink, color filter ink set, color filter, image display device, and electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color filter ink capable of maintaining excellent discharge stability over a long period of time which can be suitably used to manufacture a color filter having the excellent uniformity of characteristics between units, in which the unevenness of a color and density among regions is suppressed, and by which an image having an excellent contrast ratio can be displayed. <P>SOLUTION: The color filter ink is used to manufacture a color filter by an inkjet method and includes a dye, a solvent, a monomer component having an acrylic acid skeleton, and a polymer A having a partial structure represented by a formula (1) where R<SP>1</SP>to R<SP>4</SP>independently represent H or a hydrocarbon group. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

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

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

On the other hand, in recent years, a method of forming a colored layer of a color filter using an inkjet head (droplet discharge head) has been proposed (see, for example, Patent Document 1). In such a method, waste of the material for forming the colored layer (colored layer forming composition) can be reduced, so that the burden on the environment can be reduced and the manufacturing cost can be suppressed. it can.
However, in the method of manufacturing a color filter using an ink jet head, when a droplet is discharged over a long period of time, the droplet discharge amount becomes unstable or the trajectory of the discharged droplet changes (so-called flight). In some cases, bending may occur), and it may become impossible to land a droplet on a site. When such a problem occurs, a variation in the color density between a plurality of colored portions that are originally required to have the same color density occurs, on a substrate on which a droplet should be landed, etc. Multiple types of ink used to form colored parts of different colors are mixed (mixed), 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. In addition, the droplet discharge device (industrial use) used for manufacturing the color filter is completely different from that applied to the printer (consumer use). For example, mass production or large work (substrate) is performed. Therefore, it is required to discharge a large amount of droplets over a long period of time. Since it is used under such harsh conditions, it tends to cause fluctuations in the discharge amount of liquid droplets compared to those for consumer use. Variations in characteristics between filters and variations in color density in each part of the color filter occur, and the reliability of the color filter as a product is significantly reduced.
Also, in order to ensure a wider color reproduction range and high contrast ratio in color filters, in recent years, there is a tendency to use high colorant content as color filter ink, but the colorant content rate. The higher the value, the more prominent the above problems.

JP 2002-372613 A

  The object of the present invention is to maintain excellent ejection stability over a long period of time, suppress uneven color and uneven density at each site, and display an image with excellent contrast ratio. Ink-jet color filter inks and ink sets that can be suitably used in the manufacture of color filters with excellent uniformity of characteristics, color unevenness and density unevenness at each site are suppressed, and contrast ratio It is an object to provide a color filter that can display an excellent image, and has excellent uniformity of characteristics among individuals, and to provide an image display device and an electronic apparatus provided with the color filter.

これにより、長期間にわたって優れた吐出安定性を保持することができ、各部位での色むら、濃度むらが抑制され、コントラスト比に優れた画像を表示することができ、個体間での特性の均一性に優れたカラーフィルターの製造に好適に用いることができる、インクジェット方式のカラーフィルター用インクを提供することができる。 Such an object is achieved by the present invention described below.
The color filter ink of the present invention is a color filter ink used for producing a color filter by an inkjet method,
It contains a dye, a solvent, and a polymer A including a monomer component having an acrylic acid skeleton and having a partial structure represented by the following formula (1).

As a result, excellent discharge stability can be maintained over a long period of time, color unevenness and density unevenness at each part can be suppressed, images with excellent contrast ratios can be displayed, and characteristics between individuals can be displayed. An ink for an ink-jet color filter that can be suitably used for producing a color filter having excellent uniformity can be provided.

これにより、カラーフィルター用インクの長期間にわたる吐出安定性等を特に優れたものとすることができる。また、カラーフィルター用インクを用いて製造されるカラーフィルターにおいて、各部位での色むら、濃度むらや、コントラスト比の低下、個体間での特性差等の問題の発生をより確実に防止することができるとともに、カラーフィルター用インクを用いて形成される着色部の基板に対する密着性を特に優れたものとすることができ、カラーフィルターの耐久性を特に優れたものとすることができる。 In the color filter ink of the present invention, the polymer A preferably contains a monomer component represented by the following formula (2).

Thereby, the discharge stability of the color filter ink over a long period of time can be made particularly excellent. In addition, in color filters manufactured using color filter inks, it is possible to more reliably prevent the occurrence of problems such as color unevenness, density unevenness, a decrease in contrast ratio, and differences in characteristics between individuals. In addition, the adhesion of the colored part formed with the color filter ink to the substrate can be made particularly excellent, and the durability of the color filter can be made particularly excellent.

これにより、カラーフィルター用インクの長期間にわたる吐出安定性等を特に優れたものとすることができる。また、カラーフィルター用インクを用いて製造されるカラーフィルターにおいて、各部位での色むら、濃度むらや、コントラスト比の低下、個体間での特性差等の問題の発生をより確実に防止することができるとともに、カラーフィルター用インクを用いて形成される着色部の基板に対する密着性を特に優れたものとすることができ、カラーフィルターの耐久性を特に優れたものとすることができる。 In the color filter ink of the present invention, the polymer A preferably contains a monomer component represented by the following formula (3).

Thereby, the discharge stability of the color filter ink over a long period of time can be made particularly excellent. In addition, in color filters manufactured using color filter inks, it is possible to more reliably prevent the occurrence of problems such as color unevenness, density unevenness, a decrease in contrast ratio, and differences in characteristics between individuals. In addition, the adhesion of the colored part formed with the color filter ink to the substrate can be made particularly excellent, and the durability of the color filter can be made particularly excellent.

これにより、カラーフィルター用インクを用いて形成される着色部の耐溶剤性、基板に対する密着性を特に優れたものとすることができる。また、カラーフィルター用インクの長期間にわたる吐出安定性等を特に優れたものとすることができる。また、カラーフィルター用インクを用いて製造されるカラーフィルターにおいて、各部位での色むら、濃度むらや、コントラスト比の低下、個体間での特性差等の問題の発生をより確実に防止することができる。 In the color filter ink of the present invention, the polymer A preferably contains a monomer component represented by the following formula (4).

Thereby, especially the solvent resistance of the coloring part formed using the ink for color filters, and the adhesiveness with respect to a board | substrate can be made excellent. Further, the discharge stability of the color filter ink over a long period of time can be made particularly excellent. In addition, in color filters manufactured using color filter inks, it is possible to more reliably prevent the occurrence of problems such as color unevenness, density unevenness, a decrease in contrast ratio, and differences in characteristics between individuals. Can do.

これにより、カラーフィルター用インクを用いて形成される着色部の表面に不本意な凹凸が生じることをより確実に防止することができ、カラーフィルターの各部位での色むら、濃度むらや、コントラスト比の低下、個体間での特性差等の問題の発生をより確実に防止することができる。 In the color filter ink of the present invention, the polymer A preferably contains a monomer component represented by the following formula (5).

As a result, it is possible to more surely prevent the occurrence of unintended irregularities on the surface of the colored portion formed using the color filter ink, and the color unevenness, density unevenness, and contrast in each part of the color filter. It is possible to more reliably prevent the occurrence of problems such as a decrease in ratio and differences in characteristics between individuals.

これにより、カラーフィルター用インクの長期間にわたる吐出安定性等を十分に優れたものとしつつ、カラーフィルター用インクを用いて形成される着色部の基板に対する密着性、特に、急激な温度変化に繰り返しさらされた場合等における密着性を特に優れたものとすることができ、光漏れ（白抜け、輝点）等の問題が発生するのをより確実に防止することができる。また、カラーフィルター用インクを用いて形成される着色部の表面に不本意な凹凸が生じることをより確実に防止することができ、カラーフィルターの各部位での色むら、濃度むらや、コントラスト比の低下、個体間での特性差等の問題の発生をより確実に防止することができる。 In the color filter ink of the present invention, the polymer A preferably contains a monomer component represented by the following formula (6).

As a result, the color filter ink has sufficiently excellent discharge stability over a long period of time, and the adhesion of the colored portion formed using the color filter ink to the substrate, particularly repeated sudden temperature changes. Adhesion when exposed to light can be made particularly excellent, and problems such as light leakage (white spots and bright spots) can be more reliably prevented. In addition, it is possible to more reliably prevent unintended irregularities from occurring on the surface of the colored portion formed using the color filter ink. Color unevenness, density unevenness, and contrast ratio in each part of the color filter can be prevented. It is possible to more surely prevent the occurrence of problems such as a decrease in characteristics and differences in characteristics between individuals.

これにより、カラーフィルター用インクの吐出安定性、カラーフィルター用インクの保存安定性等を特に優れたものとすることができ、長期間にわたって安定的にカラーフィルターを製造することができ、結果として、カラーフィルターの生産性を特に優れたものとすることができる。また、カラーフィルター用インクを用いて製造されるカラーフィルターにおいて、各部位での色むら、濃度むらや、個体間での特性差等の問題の発生をより確実に防止することができる。また、製造されるカラーフィルターについてのコントラスト比、明度を特に優れたものとすることができる。また、カラーフィルターの耐久性を優れたものとすることができる。 In the color filter ink of the present invention, the color filter ink includes a monomer component m1 represented by the following formula (21), a monomer component m2 having a carboxyl group or an acid anhydride group, and the following formula (23). It is preferable that it contains the polymer M containing the monomer component m3 represented by these.

Thereby, the discharge stability of the color filter ink, the storage stability of the color filter ink, etc. can be made particularly excellent, and the color filter can be stably produced over a long period of time. The productivity of the color filter can be made particularly excellent. Further, in the color filter manufactured using the color filter ink, it is possible to more surely prevent the occurrence of problems such as color unevenness, density unevenness, and characteristic differences among individuals. Further, the contrast ratio and lightness of the produced color filter can be made particularly excellent. Further, the durability of the color filter can be improved.

これにより、カラーフィルター用インクを用いて形成される着色部の表面に不本意な凹凸が生じてしまうのをより効果的に防止することができ、製造されるカラーフィルターの各部位での色むら、濃度むら等をより効果的に防止し、表示される画像の明度、コントラストを特に優れたものとすることができる。また、形成される着色部の硬度、耐溶剤性を特に優れたものとし、製造されるカラーフィルターの耐久性を特に優れたものとすることができる。 In the color filter ink of the present invention, the color filter ink includes a monomer component x1 represented by the following formula (11), a monomer component x3 represented by the following formula (13), and the following formula (14). It is preferable that the polymer X containing the monomer component x4 represented by these is included.

Thereby, it is possible to more effectively prevent unintentional irregularities from occurring on the surface of the colored portion formed using the color filter ink, and uneven color at each part of the produced color filter. Further, uneven density and the like can be prevented more effectively, and the brightness and contrast of the displayed image can be made particularly excellent. In addition, the hardness and solvent resistance of the colored portion to be formed can be made particularly excellent, and the durability of the produced color filter can be made particularly excellent.

これにより、カラーフィルター用インクを用いて形成される着色部の基板に対する密着性を特に優れたものとすることができ、製造されるカラーフィルターの耐久性を特に優れたものとすることができる。 In the color filter ink of the present invention, the color filter ink preferably contains a polymer Y containing a monomer component y1 represented by the following formula (15).

Thereby, the adhesiveness with respect to the board | substrate of the coloring part formed using the ink for color filters can be made especially excellent, and durability of the color filter manufactured can be made especially excellent.

The color filter ink set of the present invention is a color filter ink set comprising a plurality of types of inks used in the production of a color filter,
At least one of the plurality of types of ink constituting the color filter ink set is the color filter ink of the present invention.
As a result, excellent discharge stability can be maintained over a long period of time, color unevenness and density unevenness at each part can be suppressed, images with excellent contrast ratios can be displayed, and characteristics between individuals can be displayed. An ink set for an ink-jet color filter that can be suitably used for the production of a color filter having excellent uniformity can be provided.

The color filter of the present invention is manufactured using the color filter ink of the present invention.
As a result, color unevenness, density unevenness, and the like at each part are suppressed, an image with excellent contrast ratio can be displayed, and a color filter with excellent uniformity of characteristics among individuals can be provided.

The color filter of the present invention is manufactured using the color filter ink set of the present invention.
As a result, color unevenness, density unevenness, and the like at each part are suppressed, an image with excellent contrast ratio can be displayed, and a color filter with excellent uniformity of characteristics among individuals can be provided.

An image display device according to the present invention includes the color filter according to the present invention.
As a result, color unevenness, density unevenness, and the like in each part of the display unit are suppressed, an image having an excellent contrast ratio can be displayed, and an image display device having excellent uniformity of characteristics among individuals is provided. be able to.
An electronic apparatus according to the present invention includes the image display device according to the present invention.
Accordingly, it is possible to suppress uneven color and uneven density at each part of the display unit, display an image having an excellent contrast ratio, and provide an electronic device having excellent uniformity of characteristics among individuals. Can do.

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 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 contains a dye, a resin material, a solvent, and the like.

<Dye>
The color filter usually has a plurality of different colored portions (generally, three colored portions corresponding to RGB), and the colored portion is generally made of a material containing a colorant. As the colorant, pigments and dyes can be used. Among these, dyes are advantageous in improving the contrast of an image displayed using a produced color filter. For this reason, in this invention, dye is used as a coloring agent.

  Examples of the dye include azo dyes, anthraquinone dyes, condensed polycyclic aromatic carbonyl dyes, indigoid dyes, carbonium dyes, phthalocyanine dyes, methine, and polymethine dyes. Specific examples of the dye include C.I. I. Direct Red 2, 4, 9, 23, 26, 28, 31, 39, 62, 63, 72, 75, 76, 79, 80, 81, 83, 84, 89, 92, 95, 111, 173, 184 207, 211, 212, 214, 218, 221, 223, 224, 225, 226, 227, 232, 233, 240, 241, 242, 243, 247; 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; I. Reactive Red 3, 13, 17, 19, 21, 22, 23, 24, 29, 35, 37, 40, 41, 43, 45, 49, 55; I. B. Basic Red 12, 13, 14, 15, 18, 22, 23, 24, 25, 27, 29, 35, 36, 38, 39, 45, 46; I. Direct violet 7, 9, 47, 48, 51, 66, 90, 93, 94, 95, 98, 100, 101; I. Acid Violet 5, 9, 11, 34, 43, 47, 48, 51, 75, 90, 103, 126; I. Reactive violet 1,3,4,5,6,7,8,9,16,17,22,23,24,26,27,33,34; I. B. Basic violet 1, 2, 3, 7, 10, 15, 16, 20, 21, 25, 27, 28, 35, 37, 39, 40, 48; 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; 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; I. Reactive Yellow 2, 3, 13, 14, 15, 17, 18, 23, 24, 25, 26, 27, 29, 35, 37, 41, 42; I. Basic yellow 1, 2, 4, 11, 13, 14, 15, 19, 21, 23, 24, 25, 28, 29, 32, 36, 39, 40; I. Acid Green 16; C.I. I. Acid Blue 9, 45, 80, 83, 90, 185; I. C. Basic Orange 21, 23; I. Disper thread 54, 60, 73, 92; I. Disperse yellow 51, 54, 64, 79; C.I. I. Disperse blue 56, 79, 81, 139; I. Solvent Red 23, 24, 26; C.I. I. Solvent Yellow 2, 7, 14; C.I. I. Solvent Blue 37, 38 and the like can be mentioned, and one or more selected from these can be used in combination.

  The dye content in the color filter ink is preferably 2 wt% or more and 25 wt% or less, and more preferably 3 wt% or more and 20 wt% or less. When the dye content is within the above range, a higher color density can be secured in a color filter produced using the color filter ink, and the dye can be used for clearer image display. Conventionally, when the colorant is contained at a relatively high concentration as described above, the ejection stability is particularly low, and when ejecting droplets of color filter ink, flight bending or droplet ejection Problems such as destabilization of quantity were particularly likely to occur. Further, in the past, particularly when a colored portion is formed by discharging droplets on a large substrate (for example, G5 or more), the occurrence of defective products due to variations in the discharge amount at each site in the surface becomes significant. There is a problem that the productivity of the color filter is remarkably lowered. On the other hand, in the present invention, even when the dye is contained at a relatively high concentration, as described in detail later, the occurrence of the above-described problems can be reliably prevented, and the manufactured color filter Thus, it is possible to reliably prevent the occurrence of color unevenness, density unevenness, etc., and variation in characteristics among individuals, and a color filter can be manufactured with excellent productivity. That is, when the color filter ink contains a relatively high concentration of the dye as described above, the effects of the present invention are more remarkably exhibited. In addition, the durability of the manufactured color filter can be made particularly excellent.

<Resin material>
In general, the color filter ink contains a resin material (binder resin) for the purpose of improving the adhesion of the formed colored portion to the substrate. And it is said that it is preferable to use curable resin material as a resin material for the purpose of making the effect of the adhesiveness improvement with respect to the board | substrate of a coloring part higher. However, with conventional color filter inks, when droplets are ejected over a long period of time, the amount of ejected droplets becomes unstable, or the trajectory of the ejected droplets changes (so-called flight curve occurs). ), There is a problem that a droplet cannot be landed on the site for the purpose. When such a problem occurs, a variation in the color density between a plurality of colored portions that are originally required to have the same color density occurs, on a substrate on which a droplet should be landed, etc. Multiple types of ink used to form colored parts of different colors are mixed (mixed), 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.

  In addition, in the conventional color filter ink, in order to prevent and suppress the adverse effects due to adhesion to the nozzles of the inkjet head, the color filter ink used for droplet ejection, the color filter in the droplet ejection apparatus, It is difficult to sufficiently increase the productivity of color filters because it is necessary to frequently replace inks for color filters. In addition, the color filter lots that are manufactured with the replacement and replacement of color filter inks Characteristic differences are likely to occur.

  In addition, in the production of a color filter by the ink jet method, generally, after performing droplet discharge into a cell provided on a substrate, the solvent is removed and the color filter ink is solidified. The thixotropic property and viscosity of the color filter ink increase as the solid content concentration increases due to the removal, and the surface of the colored portion to be formed has unintentional unevenness, which is displayed using the color filter. There are problems such as uneven color, uneven density, etc. in the image, and lowering the contrast ratio. Such a tendency appears more prominently when the content of the colorant is higher than the resin material.

  In addition, in a color filter manufactured using a conventional color filter ink, when an ITO (indium tin oxide) film is formed on the surface by a vapor deposition method, discoloration may occur in the colored portion. Problems such as failure to make the adhesion between the color filter and the ITO film sufficiently excellent were likely to occur.

  As a result of earnest research, the present inventor has found that the resin material contained in the ink has a great influence on the occurrence of the above phenomenon, and further, the resin material as described in detail below. It has been found that the use of (resin material containing polymer A) can surely prevent and suppress the occurrence of the above problems.

Hereinafter, the resin material constituting the color filter ink of the present invention will be described in detail.
[Polymer A]
In the present invention, the color filter ink includes a polymer A including a monomer component having an acrylic acid skeleton and having a partial structure represented by the following formula (1).

  By including such a polymer A, the discharge stability of droplets is excellent for a long period of time, and the occurrence of problems such as uneven color, uneven density, and reduced contrast ratio in the manufactured color filter is ensured. Can be prevented. Further, the adhesion between the color filter and the ITO film when the ITO film is formed on the surface of the manufactured color filter can be made excellent.

In the formula (1), R ¹ , R ² , R ³ and R ⁴ may be each independently a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms, but is preferably a methyl group. Thereby, the discharge stability of the color filter ink can be made particularly excellent.
Although the partial structure represented by Formula (1) should just be contained in the chemical structure of the polymer A at least 1 piece, It is preferable that multiple pieces are contained. As a result, the discharge stability of the droplets is made particularly excellent, and the occurrence of problems such as uneven color, uneven density, and reduced contrast ratio in the manufactured color filter can be more reliably prevented. Further, the adhesion between the color filter and the ITO film when the ITO film is formed on the surface of the manufactured color filter can be made particularly excellent.

  The polymer A may have any partial structure represented by the above formula (1), but preferably has a partial structure represented by the following formula (7). As a result, the discharge stability of the droplets is made particularly excellent, and the occurrence of problems such as uneven color, uneven density, and reduced contrast ratio in the manufactured color filter can be more reliably prevented. Further, the adhesion between the color filter and the ITO film when the ITO film is formed on the surface of the manufactured color filter can be made particularly excellent.

In formula (7), R ⁵ and R ⁶ may be independently a hydrogen atom or a hydrocarbon group having 1 to 6 carbon atoms, but are preferably a butyl group. Thereby, the discharge stability of the color filter ink can be made particularly excellent.
Moreover, in Formula (7), n should just be 1-5, but it is preferable that it is 1-3, and it is more preferable that it is 2. Thereby, the discharge stability of the color filter ink can be made particularly excellent.

The polymer A may be any polymer having a partial structure as described above, but is preferably a curable polymer (particularly a thermosetting polymer). Thereby, the durability of the color filter manufactured using the color filter ink can be made particularly excellent.
Moreover, although the polymer A should just have a partial structure as mentioned above, it may contain the monomer component represented by following formula (2).

Thereby, the discharge stability of the color filter ink over a long period of time can be made particularly excellent. In addition, in color filters manufactured using color filter inks, it is possible to more reliably prevent the occurrence of problems such as color unevenness, density unevenness, a decrease in contrast ratio, and differences in characteristics between individuals. Can do. In addition, the resin material has a characteristic that allows the curing reaction to proceed efficiently at a temperature higher than the predetermined temperature at a predetermined temperature or lower (hereinafter, also referred to as “curing reaction switching characteristics”). The storage stability of the color filter ink is particularly excellent, and the adhesion of the colored portion formed using the color filter ink to the substrate is particularly excellent. The durability of the color filter can be made particularly excellent. Moreover, when the polymer A contains the monomer component represented by the formula (2), the affinity and compatibility between the polymer A and the polymer M described later can be made particularly excellent. When the color filter ink contains another polymer, the transparency of the colored portion formed using the color filter ink can be made particularly excellent (light transmittance due to the opacity of the resin material) Can be prevented).
Moreover, the polymer A may contain the monomer component represented by following formula (3).

Thereby, the discharge stability of the color filter ink over a long period of time can be made particularly excellent. In addition, in color filters manufactured using color filter inks, it is possible to more reliably prevent the occurrence of problems such as color unevenness, density unevenness, a decrease in contrast ratio, and differences in characteristics between individuals. In addition, the adhesion of the colored part formed with the color filter ink to the substrate can be made particularly excellent, and the durability of the color filter can be made particularly excellent. Moreover, when the polymer A contains the monomer component represented by the formula (3), the affinity and compatibility between the polymer A and the polymer M described later can be made particularly excellent. When the color filter ink contains another polymer, the transparency of the colored portion formed using the color filter ink can be made particularly excellent (light transmittance due to the opacity of the resin material) Can be prevented).
Moreover, the polymer A may contain the monomer component represented by following formula (4).

Thereby, especially the solvent resistance of the coloring part formed using the ink for color filters, and the adhesiveness with respect to a board | substrate can be made excellent. Further, the ejection stability of the color filter ink over a long period of time can be made particularly excellent. In addition, in color filters manufactured using color filter inks, it is possible to more reliably prevent the occurrence of problems such as color unevenness, density unevenness, a decrease in contrast ratio, and differences in characteristics between individuals. Can do. In addition, when the polymer A contains the monomer component represented by the formula (4), the affinity between the polymer A and the polymer M, polymer X, etc., which will be described later, is particularly excellent. When the color filter ink contains these polymers, the transparency of the colored portion formed using the color filter ink can be made particularly excellent (the opacity of the resin material). Can prevent the light transmittance from being reduced).
Moreover, the polymer A may contain the monomer component represented by following formula (5).

As a result, it is possible to more surely prevent the occurrence of unintended irregularities on the surface of the colored portion formed using the color filter ink, and the color unevenness, density unevenness, and contrast in each part of the color filter. It is possible to more reliably prevent the occurrence of problems such as a decrease in ratio and differences in characteristics between individuals. Further, when the polymer A contains the monomer component represented by the formula (5), the affinity and compatibility between the polymer A and the polymer M to be described later can be made particularly excellent. When the color filter ink contains the polymer M or the like, the transparency of the colored part formed using the color filter ink can be made particularly excellent (light transmittance due to the opacity of the resin material). Can be prevented).
Moreover, the polymer A may contain the monomer component represented by following formula (6).

  As a result, the color filter ink has sufficiently excellent discharge stability over a long period of time, and the adhesion of the colored portion formed using the color filter ink to the substrate, particularly repeated sudden temperature changes. Adhesion when exposed to light can be made particularly excellent, and problems such as light leakage (white spots and bright spots) can be more reliably prevented. In addition, it is possible to more reliably prevent unintended irregularities from occurring on the surface of the colored portion formed using the color filter ink. Color unevenness, density unevenness, and contrast ratio in each part of the color filter can be prevented. It is possible to more surely prevent the occurrence of problems such as a decrease in characteristics and differences in characteristics between individuals. In addition, when the polymer A contains the monomer component represented by the formula (6), the affinity and compatibility between the polymer A and the polymer M described later can be made particularly excellent. When the color filter ink contains the polymer M or the like, the transparency of the colored part formed using the color filter ink can be made particularly excellent (light transmittance due to the opacity of the resin material). Can be prevented).

The content (C _A [wt%]) of the polymer A in the color filter ink is preferably 0.3 wt% or more and 12 wt% or less, and more preferably 0.5 wt% or more and 8.5 wt% or less. More preferred.
The polymer A may be substantially composed of a single compound, or may be a mixture of a plurality of types of compounds. However, when the polymer A is a mixture of a plurality of types of compounds, each compound has a partial structure as described above.

  The weight average molecular weight of the polymer A is preferably 2000 or more and 50000 or less, and more preferably 4000 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 reliably increased, and the occurrence of uneven color in the image displayed using the color filter can be prevented more effectively. can do.

Moreover, it is preferable that the dispersion degree (weight average molecular weight Mw / number average molecular weight Mn) of the polymer A is 1-3.
As described above, in the present invention, the resin material includes the polymer A, but may further include another resin component (polymer).
Examples of such a resin component (polymer) include polymer M, polymer X, and polymer Y as described below.

[Polymer M]
The polymer M includes a monomer component m1 represented by the following formula (21), a monomer component m2 having a carboxyl group or an acid anhydride group, and a monomer component m3 represented by the following formula (23): Is included.

By including such a polymer M, the discharge stability of the color filter ink, the storage stability of the color filter ink, etc. can be made particularly excellent, and the color filter can be produced stably over a long period of time. As a result, the productivity of the color filter can be made particularly excellent. Further, in the color filter manufactured using the color filter ink, it is possible to more surely prevent the occurrence of problems such as color unevenness, density unevenness, and characteristic differences among individuals. In addition, the colored portion formed using the color filter ink is particularly excellent in flatness, and the contrast ratio and brightness of the manufactured color filter can be particularly improved. Further, the durability of the color filter can be improved. In addition, the resin material has a characteristic that allows the curing reaction to proceed efficiently at a temperature higher than the predetermined temperature at a predetermined temperature or lower (hereinafter, also referred to as “curing reaction switching characteristics”). Etc. can be made excellent. In addition, since the polymer M is very excellent in affinity and compatibility with the resin components (polymer X and polymer Y) described later, even if it contains a plurality of types of resin components, the color filter Prevents unintentional precipitation of resin material in the ink for ink, enables droplet discharge with excellent discharge stability, and fully exhibits the characteristics of each resin component in the formed colored part It is possible to reliably prevent the occurrence of problems such as a decrease in transparency due to unintended phase separation. In addition, the long-term storage stability of the color filter ink (the life of the color filter ink) is extremely excellent, and it effectively prevents the occurrence of problems such as quality degradation due to the mass production of color filter ink. In addition, since the replacement frequency of the color filter ink can be reduced when manufacturing the color filter, the productivity of the color filter and the reliability of the manufactured color filter can be improved.
The polymer M may be substantially composed of a single compound, or may be a mixture of a plurality of types of compounds.

(Monomer component m1)
The polymer M contains a monomer component m1 represented by the above formula (21), 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 (21) 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 at the time of storage of the color filter ink or at the time of droplet discharge or the like. In the curing treatment performed in a heating environment while reliably preventing, the curing reaction (polymerization reaction) of the resin material can be suitably proceeded. 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 contained in the monomer component m1 in the polymer M is deblocked by a relatively high temperature during the curing treatment to generate an active isocyanate group, and the isocyanate group and the carboxyl group or acid anhydride are generated. While the group contributes to curing and can improve adhesion to the substrate, heat resistance, chemical resistance, etc., when a relatively low energy is applied, deblocking as described above proceeds. Therefore, the progress of the curing reaction is prevented and suppressed.

In the monomer A represented by the formula (21), 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 linear or branched divalent saturated aliphatic hydrocarbon group (alkylene group). A divalent saturated aliphatic hydrocarbon group having 2 to 4 carbon atoms such as ethylene, trimethylene and propylene groups is preferred.

Examples of the isocyanate group blocking agent R ³ H include oxime blocking agents such as formaldoxime, acetoaldoxime, acetoxime, methyl ethyl ketoxime, methyl isobutyl ketoxime, diethyl ketoxime, cyclohexanone oxime, diacetyl monooxime, and benzophenone oxime. A pyrazole block agent such as 3,5-dimethylpyrazole; an alcohol block agent such as methanol and ethanol; a phenol block agent such as phenol and cresol; a mercaptan block agent such as butyl mercaptan; acetanilide, ε-caprolactam, γ -Acid amide blocking agents such as butyrolactam; active methylene blocking agents such as dimethyl malonate and methyl acetoacetate; imides such as succinimide and maleic imide Lock agent; urea blocking agents; N- phenylcarbamate type blocking agents of phenyl carbamate, and the like; diphenylamine, amine blocking agents such as aniline, ethylene imine, etc. imine blocking agents such as polyethyleneimine.
As an isocyanate group blocking agent, an oxime blocking agent and a pyrazole blocking agent are preferable, and those represented by the following formula (25) are more preferable.

Examples of the alkyl group having 1 to 8 carbon atoms in R ⁶ and R ⁷ in the formula (25) include a linear or branched alkyl group, and a carbon number such as a methyl, ethyl, propyl group, or the like. 1 or more and 4 or less linear or branched alkyl group is preferable. Examples of the ring in which R ⁶ and R ⁷ are bonded to each other together with the adjacent carbon atom include a cycloalkane having about 3 to 12 members (preferably 5 or 6 members) such as a cyclobutane ring, a cyclopentane ring, and a cyclohexane ring. A ring etc. are mentioned.

  Specific examples of the monomer component m1 represented by the formula (21) include 2- [O- (1′-methylpropylideneamino) carboxyamino] ethyl methacrylate (= 2- (1-methylpropylideneamino). (Oxycarbonylaminoethyl) methacrylate) (represented by the following formula (26)), 2- (3,5-dimethylpyrazol-1-yl) carbonylaminoethyl methacrylate (represented by the following formula (27)) ) And the like.

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

(Monomer component m2)
The polymer M contains a monomer component m2 having a carboxyl group or an acid anhydride group as a monomer component. The polymer M constituting the color filter ink may include a plurality of types of monomer components m2 in the molecule.
By including such a monomer component m2 as a monomer component in the polymer M, it is possible to improve the wetting and spreading of the color filter ink onto the substrate, and the incorporation of bubbles and the like A colored portion that is reliably prevented and has excellent adhesion to the substrate can be suitably formed. Further, by containing the monomer component m2 as a monomer component, the long-term storage stability of the color filter ink can be made particularly excellent.

  Examples of the monomer component m2 include unsaturated carboxylic acids or acid anhydrides thereof. Specific examples of the monomer component m2 include α, β-unsaturated carboxylic acids such as acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, fumaric acid, and acid anhydrides thereof (maleic anhydride, itaconic anhydride). Acid) and the like, among which acrylic acid and methacrylic acid (represented by the following formula (22)) are particularly preferred.

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

(Monomer component m3)
The polymer M contains the monomer component m3 ((meth) acrylic acid ester) represented by the above formula (23) 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 (23) 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 storage stability (long-term storage stability) of the color filter ink can be improved.

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 A group 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, 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. On the other hand, when the carbon number of R ⁵ is less than the lower limit value or exceeds the upper limit value, the excellent effects as described above cannot be obtained. Thus, the polymer M has one big feature in that it includes a monomer component (monomer component m3) having a group (R ⁵ ) having a predetermined number of carbon atoms.

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

Polymer ratio of the monomer component m1 in _{M (C m1 [wt%]} ) and the monomer ratio of the components _{m2 (C m1 [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 (28).

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

(Monomer component m4)
The polymer M may contain the monomer component m4 ((meth) acrylic acid ester) represented by the following formula (24) as a monomer component.

By including the monomer component m4 in the polymer M, the solubility of the resin material in the color filter ink is excellent even when the solvent constituting the color filter ink is highly hydrophilic. The transparency of the colored portion formed using the color filter ink can be made excellent.
In the monomer component m4, R ⁹ represents a hydrocarbon group having 1 to 15 carbon atoms which may have a hydrocarbon group-substituted oxy group, and the hydrocarbon group has 1 to 12 carbon atoms. 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; 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 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 (29).

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

(Monomer component m6)
The polymer M may include a monomer component m6 that is a hydroxyl group-containing compound as a monomer component.
When the polymer M contains the monomer component m6, the storage stability of the color filter ink can be made particularly excellent. Moreover, the hardening reaction of the resin material at the time of colored part formation can be advanced more suitably.

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

(Monomer component m7)
The polymer M may contain the monomer component m7 which is a vinyl compound having a 3- to 5-membered cyclic ether group as a monomer component.
The monomer component m7 (a vinyl compound having a 3- to 5-membered cyclic ether group) includes an oxirane ring (epoxy group) -containing polymerizable unsaturated compound, an oxetane ring (oxetanyl group) -containing polymerizable unsaturated compound, and an oxolane ring. (Oxolanyl group) -containing polymerizable unsaturated compounds are included.

By including the monomer component m7 in the polymer M, it is possible to further improve the hardness of the colored portion formed using the color filter ink, the adhesion to the substrate, and the like.
Examples of the oxirane ring (epoxy group) -containing polymerizable unsaturated compound include oxiranyl (meth) acrylate, glycidyl (meth) acrylate, 2-methylglycidyl (meth) acrylate, 2-ethylglycidyl (meth) acrylate, 2-oxy Polymerizable unsaturated compounds containing an oxirane ring (monocyclic) such as ranylethyl (meth) acrylate, 2-glycidyloxyethyl (meth) acrylate, 3-glycidyloxypropyl (meth) acrylate, glycidyloxyphenyl (meth) acrylate, etc. ((Meth) acrylic acid ester derivatives and the like); 3,4-epoxycyclohexyl (meth) acrylate, 3,4-epoxycyclohexylmethyl (meth) acrylate, 2- (3,4-epoxycyclohexyl) ethyl (meth) acrylate, Epoxy group-containing alicyclic rings such as 3,4-epoxycyclohexane rings such as-(3,4-epoxycyclohexylmethyloxy) ethyl (meth) acrylate and 3- (3,4-epoxycyclohexylmethyloxy) propyl (meth) acrylate Polymerizable unsaturated compounds containing the formula carbocycle ((meth) acrylic acid ester derivatives and the like); 5,6-epoxy- such as 5,6-epoxy-2-bicyclo [2.2.1] heptyl (meth) acrylate Polymerizable unsaturated compounds containing a 2-bicyclo [2.2.1] heptane ring (such as (meth) acrylic acid ester derivatives); epoxidized dicyclopentenyl (meth) acrylate [3,4-epoxytricyclo [5. 2.1.0 ^2,6] decan-9-yl (meth) acrylate, 3,4-epoxytricyclo [5.2.1.0 ^2, ] Decan-8-yl (meth) acrylate or mixtures thereof,], epoxidized dicyclopentenyloxyethyl (meth) acrylate [2- (3,4-epoxytricyclo [5.2.1.0 ^2,6 ] Decan-9-yloxy) ethyl (meth) acrylate, 2- (3,4-epoxytricyclo [5.2.1.0 ^2,6 ] decan-8-yloxy) ethyl (meth) acrylate, or these Mixture], 3,4-epoxy tricyclo [5.2.1.0 ^2,6 ] decane ring such as epoxidized dicyclopentenyloxybutyl (meth) acrylate, epoxidized dicyclopentenyloxyhexyl (meth) acrylate, etc. Examples thereof include polymerizable unsaturated compounds (such as (meth) acrylic acid ester derivatives). As another oxirane ring (epoxy group) -containing polymerizable unsaturated compound, a vinyl ether compound containing an epoxy group, an allyl ether compound containing an epoxy group, an aromatic vinyl compound containing an epoxy group, or the like can also be used. Examples of the aromatic vinyl compound containing an epoxy group include styrene derivatives such as 4-vinylbenzylglycidyl ether, 4-vinylbenzyloxirane, and 4-vinylphenethyloxirane.

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

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

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

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

Further, the dispersity (weight average molecular weight Mw / number average molecular weight Mn) of the polymer M is preferably 1 or more and 3 or less.
The content _{C M} of the polymer M in the color filter ink is preferably less 0.5 wt% or more 12 wt%, and more preferably less than 1.0 wt% 9.0 wt%.
The content of the polymer M in the color filter ink is preferably 0.6 wt% or more and 13.0 wt% or less, and more preferably 0.9 wt% or more and 9.0 wt% or less. Thereby, the effect by including the polymer M can be more effectively exhibited while fully exhibiting the functions of other components.

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

By including such a polymer X, the solvent property of the colored portion formed using the color filter ink is particularly improved while sufficiently improving the switching characteristics of the curing reaction as the entire resin material. It can be excellent, and the flatness of the surface of the colored portion to be formed can be particularly high. As a result, it is possible to more reliably prevent color unevenness, density unevenness, contrast reduction, etc. at each part of the color filter manufactured using the color filter ink, and durability and reliability of the color filter. Can be made particularly excellent. In addition, by including the polymer X, the affinity and compatibility of each polymer component in the color filter ink (particularly, the affinity and compatibility of the polymer X with the polymer M and polymer Y). Since it can be made sufficiently excellent, the colored portion formed by using the color filter ink with excellent discharge stability of the color filter ink while fully exhibiting the features of the polymer X The transparency can be high.
In addition, the polymer X may consist essentially of a single compound, or may be a mixture of a plurality of types of compounds. However, when the polymer X is a mixture of a plurality of types of compounds, each compound contains monomer components x1, x3, and x4.

(Monomer component x1)
The polymer X contains the monomer component x1 represented by the formula (11) as a monomer component.
By containing such a monomer component x1 as a monomer component, an unintentional reaction (polymerization reaction) of the resin material at the time of storage of the color filter ink or at the time of droplet discharge is reliably prevented. In the curing treatment performed in a heating environment, the curing reaction (polymerization reaction) of the resin material can be more suitably progressed. That is, by including the monomer component x1, the switching characteristics of the curing reaction for the resin material can be made particularly excellent. Further, by containing the monomer component x1 as the monomer component, for example, the long-term storage stability and ejection stability of the color filter ink can be improved. Moreover, the hardness etc. of the colored part formed can be made excellent by containing the monomer component x1 as a monomer component.

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

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

Containing such a monomer component x2 as a monomer component (particularly, together with the monomer component x1 described above and the monomer component x3 described in detail later) can preserve the color filter ink. The curing reaction (polymerization reaction) of the resin material proceeds more suitably in the curing process performed in a heating environment while reliably preventing unintentional reaction (polymerization reaction) of the resin material during discharge or droplet discharge. Can be made. In particular, in the curing treatment under a heating environment, the rising of the polymerization reaction of the resin material can be improved, and the polymerization reaction can be continuously advanced. Further, by containing the monomer component x2 as the monomer component, the hardness of the colored portion to be formed can be made particularly excellent.
Examples of the polymer X containing the monomer component x2 as a monomer component include those represented by the following formula (19).

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

(Monomer component x3)
The polymer X contains the monomer component x3 represented by the above formula (13) as a monomer component.
When the polymer X contains the monomer component x3 as the monomer component, the chemical resistance, solvent resistance, and the like of the colored portion to be formed can be made particularly excellent. Thereby, even if it is a case where post-processing, such as chemical | medical agent application | coating and washing | cleaning, is performed after a hardening process, generation | occurrence | production of the bad influence by these can be prevented reliably.

In addition, the monomer component x3 has a sufficiently low reactivity at a relatively low temperature (for example, 100 ° C. or lower) in the polymer X, similarly to the monomer component x1 described above. In a heating environment such as the heat treatment applied in step 1, it exhibits sufficient reactivity. Therefore, the curing reaction of the resin material in the curing process performed in a heated environment while reliably preventing the unintentional reaction (polymerization reaction) of the resin material during storage of the color filter ink or droplet discharge. (Polymerization reaction) can be suitably advanced.
Further, by containing the monomer component x3 as the monomer component, for example, the long-term storage stability and ejection stability of the color filter ink can be made particularly excellent.

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

(Monomer component x4)
The polymer X contains the monomer component x4 represented by the formula (14) as a monomer component.
By including such a monomer component x4 as a monomer component, when the colored portion is formed, when the solvent is removed from the color filter ink applied on the substrate, the solid content concentration increases. Thus, the thixotropic property and viscosity of the color filter ink are increased, and it is possible to more reliably prevent the occurrence of unintentional irregularities on the surface of the colored portion to be formed.

Moreover, the monomer component x4 has a hydroxyl group at the terminal. By having such a structure, the reactivity in a heating environment such as a curing process can be further enhanced while the reactivity at a relatively low temperature (for example, 100 ° C. or less) is sufficiently low. As a result, the curing reaction of the resin material is ensured in a curing process performed in a heated environment while reliably preventing unintentional reaction (polymerization reaction) of the resin material during storage of color filter ink or droplet discharge. (Polymerization reaction) can proceed more suitably.
Further, by containing the monomer component x4 as the monomer component, for example, the long-term storage stability and ejection stability of the color filter ink can be made particularly excellent.

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

When the polymer X contains other monomer components (monomer components other than the monomer components x1, x2, x3, x4), the content of other monomer components in the polymer X ( When a plurality of other monomer components are included, the sum of these contents) is preferably 15 wt% or less, and more preferably 10 wt% or less.
The weight average molecular weight of the polymer X is preferably 1000 or more and 50000 or less, more preferably 1200 or more and 10,000 or less, and further preferably 1500 or more and 5000 or less. As a result, it is possible to make the color filter ink stable over time (long-term storage stability), the discharge stability of the color filter ink, and the color filter productivity sufficiently. Furthermore, the flatness of the colored portion formed using the color filter ink can be made more reliable, and the occurrence of color unevenness in the image displayed using the color filter can be more effectively achieved. Can be prevented.
Further, the dispersity (weight average molecular weight Mw / number average molecular weight Mn) of the polymer X is preferably 1 or more and 3 or less.

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

By including such a polymer Y, the adhesion of the colored portion formed using the color filter ink to the substrate is particularly excellent while the discharge stability of the color filter ink is excellent. The durability and reliability of the manufactured color filter can be made particularly excellent.
The polymer Y may be substantially composed of a single compound, or may be a mixture of a plurality of types of compounds. However, when the polymer Y is a mixture of a plurality of types of compounds, each compound contains the monomer component y1.

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

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

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

  By containing such a monomer component y2 as a monomer component (particularly, together with the monomer component y1 described above), a resin material at the time of storage of color filter ink or at the time of droplet discharge, etc. In the curing treatment performed in a heating environment, the unintentional reaction (polymerization reaction) can be more reliably prevented, and the curing reaction (polymerization reaction) of the resin material can be suitably advanced. In particular, in the curing treatment under a heating environment, the rising of the polymerization reaction of the resin material can be improved, and the polymerization reaction can be continuously advanced. Moreover, the hardness etc. of the colored part formed can be made excellent by containing the monomer component y2 as a monomer component.

Further, when the polymer Y contains the monomer component y2, the affinity and compatibility with the above-described resin components (polymer M and polymer X) can be sufficiently improved. As a result, even when the color filter ink contains a resin component other than the polymer Y, as a result, the discharge stability of the color filter ink can be improved, and the color filter ink The colored portion formed using is excellent in transparency (a reduction in light transmittance due to the opacity of the resin material is prevented), particularly excellent in adhesion to the substrate, and is less prone to problems such as cracks. On the other hand, if the monomer component y2 is not included as a monomer component, when other resin components (polymer M, polymer X) are included, the affinity and compatibility with the other resin components are increased. It becomes difficult to make it sufficiently excellent, and the color filter ink is inferior in ejection stability, and the produced color filter is liable to cause uneven color, contrast, durability and reliability. It may be difficult to make the properties and the like sufficiently excellent.
An example of the polymer Y containing the monomer component y2 as a monomer component is represented by the following formula (20).

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

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

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

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

The content of the resin material in the color filter ink is preferably 0.5 wt% or more and 18 wt% or less, more preferably 1.0 wt% or more and 15 wt% or less, and 3.0 wt% or more and 10 wt% or less. % Or less is more preferable.
When the content of the resin material in the color filter ink is C _R [wt%] and the content of the dye in the color filter ink is C _D [wt%], 0.2 ≦ C _R / C _It is preferable to satisfy the relationship of _D ≦ 9.0, more preferably satisfy the relationship of 0.3 ≦ C _R / C _D ≦ 5.0, and 0.4 ≦ C _R / C _D ≦ 3.5. It is more preferable to satisfy this relationship. By satisfying such a relationship, the contrast of the manufactured color filter can be improved, and sufficient contrast can be ensured even when the thickness of the colored portion is made thinner. can do. In addition, in the conventional color filter ink, when the content of the resin material with respect to the content of the colorant is low, inconveniences such as unintentional unevenness on the surface of the formed colored portion are likely to occur. In the present invention, as described above, even when the resin material content relative to the colorant content is low, it is ensured that unintentional irregularities occur on the surface of the colored portion to be formed. Can be prevented. That is, by satisfying the relationship as described above, the effects of the present invention are more remarkably exhibited.
The resin material constituting the color filter ink may contain a polymer other than those described above.

<Solvent>
The solvent has a function of dissolving the dye as described above. Usually, most of the solvent is removed in the process of producing the color filter.
As the solvent, 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.) ) Ethers (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] ester of polyvalent carboxylic acid (eg succinic acid, glutaric acid etc.) (eg methyl ester etc.), [3] having at least one hydroxyl group and at least one carboxyl group in the molecule You Ether compounds (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.

  The content of the solvent in the color filter ink (the sum of these contents when a plurality of compounds are included as the solvent) is preferably 50 wt% or more and 98 wt% or less, and preferably 60 wt% or more and 95 wt% or less. More preferably, it is 65 wt% or more and 93 wt% or less. When the content of the solvent is within the above range, the color filter manufactured has excellent durability from the droplet discharge head, and the manufactured color filter has excellent durability. Can do. In addition, a sufficient color density can be ensured in the manufactured color filter.

<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, photoacid generators, various polymerization initiators, acid crosslinking agents, various pigments, surfactants, sensitizers, light stabilizers, and various dispersants. , Luminescent materials, leveling agents, ultraviolet absorbers, adhesion improvers, various polymerization accelerators, various light stabilizers, ceramics such as glass, zirconia, alumina, titanium oxide, adhesion promoters, ultraviolet absorbers, aggregation inhibitors Etc. can be used.

  A leveling agent smoothes the surface of the coloring part forming material provided in the cell by reducing the surface tension of the coloring part forming material, and flattens the coloring part. For this reason, when the coloring part forming material has a leveling agent, it acts synergistically with the effect of the thermosetting resin as described above, and the surface of the coloring part forming material in the cell is made flatter. be able to. For this reason, the colored part to be formed becomes flatter.

  Examples of the leveling agent include acrylic leveling agents, vinyl ether leveling agents, silicone leveling agents, fluorine-silicon leveling agents, and acetylene glycol leveling agents. Among such leveling agents, it is preferable to use an acrylic leveling agent, a vinyl ether leveling agent, or an acetylene glycol leveling agent. In particular, it is preferable to use one or more selected from Surfynol DF-58, LHP-95, LHP-90, and LF1970 in combination. Thereby, the surface of the colored part to be formed is further flattened, and the obtained color filter has particularly small color unevenness and density unevenness at each part.

When the pigment and the dye coexist in the color filter ink, generally, the viscosity of the color filter ink is increased, and the discharge stability of the droplet tends to be remarkably reduced. Even if the dye and the pigment coexist in the color filter ink, the occurrence of the above-described problems can be reliably prevented.
The viscosity at 25 ° C. of the color filter ink (viscosity measured using a vibration viscometer) is not particularly limited, but is preferably 4 mPa · s or more and 12 mPa · s or less, preferably 5 mPa · s or more and 11 mPa · s. The following is more preferable. When the viscosity of the color filter ink is within the above-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 to be 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.

<Ink set>
The color filter ink as described above is used for manufacturing a color filter by an ink jet method. Since the color filter usually corresponds to full color display, it has a plurality of colored portions (usually, three RGB colors corresponding to the three primary colors of light). For forming the colored portions of the plurality of colors, a plurality of types of color filter inks of corresponding colors are used. That is, an ink set including a plurality of color filter inks is used for manufacturing a color filter. In the present invention, in the production of the color filter, the color filter ink as described above may be used as long as it can be used to form at least one colored portion, but can be used to form colored portions of all colors. Is preferred.

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

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

<Coloring part>
The colored portion 12 is formed using the color filter ink (color filter ink set) as described above.
Since the colored portion 12 is formed using the color filter ink (color filter ink set) as described above, it is formed with a desired amount of ink and has a desired shape. The variation in characteristics among the 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 is suppressed in the occurrence of color unevenness, density unevenness and the like, has an excellent contrast ratio, and is highly reliable. The colored portion 12 is also excellent in adhesion with the substrate 11.

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). Further, for example, the first coloring portion 12A can be a cyan filter region (C), the second coloring portion 12B can be a magenta filter region (M), and the third coloring portion 12C can be a yellow filter region (Y). .

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

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

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

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

《Color filter manufacturing method》
Next, an example of a method for manufacturing the color filter 1 as described above (particularly an example in which the color filter ink includes a curable resin material) will be described.
FIG. 2 is a cross-sectional view illustrating a method for manufacturing a color filter, and FIG. 3 is a perspective view illustrating a droplet discharge device used for manufacturing the color filter.

  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. Ink application step (1d) for applying the ink 2 to the area surrounded by the partition wall 13 and formation of the colored portion 12 by removing the solvent from the color filter ink 2 and curing the resin material 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.
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).

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

<Ink application process>
Next, the color filter ink 2 is applied to the cell 14 surrounded by the partition wall 13 by an inkjet method (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 color filter ink 2 contains the polymer A, and is excellent in droplet discharge stability. Therefore, 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 the occurrence of problems such as flight bending. The droplet discharge amount can be easily and reliably controlled. As a result, it is possible to reliably prevent problems such as color mixing, color unevenness / density unevenness, and reduction in contrast ratio in the manufactured color filter 1.

The color filter ink 2 is discharged by using a droplet discharge device as shown in FIG.
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 in which a plurality of droplet ejection heads (inkjet heads) are mounted on a carriage, and a first position control device 104 (moving unit) that controls the position of the droplet ejection unit 103. A stage 106 that holds the substrate 11 (hereinafter also simply referred to as “substrate 11”) on which the partition wall 13 is formed in the above-described process, and a second position control device 108 (moving means) that controls the position of the stage 106. The control means 112 is provided. The tank 101 and the plurality of droplet discharge heads in the droplet discharge means 103 are connected by a tube 110, and the color filter ink 2 is supplied from the tank 101 to each of the plurality of droplet discharge heads by compressed air. The

  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 control device 104 and the second position control device 108 change the relative position of the droplet discharge head with respect to the stage 106 (the substrate 11 held on the stage 106 and the droplet discharge means 103 are relatively Moving).

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.
Using the droplet discharge device 100 as described above, the color filter ink 2 corresponding to the colored portions 12 of the plurality of colors of the color filter 1 is applied to the cells 14. By using the apparatus as described above, the color filter ink 2 can be efficiently and selectively applied to the cells 14. In addition, as described above, the color filter ink 2 has excellent ejection stability, and even when droplets are ejected for a long period of time, the flight curve and the droplet ejection amount are low. Problems such as destabilization are extremely unlikely to occur. Therefore, a plurality of types of inks used to form colored portions of different colors are mixed (mixed), or between a plurality of colored portions that are originally required to have the same color density. Problems such as the occurrence of variations in color density can be reliably prevented. In the configuration shown in the figure, the droplet discharge device 100 has only one tank 101 for holding the color filter ink 2, a tube 110, and the like for one color, but the color filter 1 has a plurality of these members. It may have a plurality of colors corresponding to the colored portion 12. In manufacturing the color filter 1, a plurality of droplet discharge devices 100 corresponding to a plurality of color filter inks 2 may be used.
In the present invention, the droplet discharge head may use a piezo element or an electrostatic actuator as a drive element. In addition, the droplet discharge head may be configured to use an electrothermal conversion element as a drive element and discharge the color filter ink by utilizing thermal expansion of a material by the electrothermal conversion element.

<Colored part forming step (curing step)>
Next, the solvent is removed from the color filter ink 2 in the cell 14 and the resin material is cured to obtain a solid colored portion 12 (1e). Thereby, the color filter 1 is obtained.
This step is usually performed by heating. By performing this step by heating, the adhesion of the colored portion 12 to be formed to the substrate 11 can be made particularly excellent. In addition, it is possible to reliably prevent the solvent of the color filter ink from remaining in the formed colored portion 12. 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 solvent can be suitably removed from the color filter ink 2.
The heating time in this step is not particularly limited, but is preferably 30 minutes or longer and 190 minutes or shorter, and more preferably 40 minutes or longer and 130 minutes or shorter.

In this step, a plurality of heat treatments with different temperatures may be performed. Specifically, in this step, a first heat treatment that heats the substrate 11 at a relatively low temperature and a second heat treatment that heats the substrate 11 at a temperature higher than the first heat treatment are performed. May be.
As a result, unintentional deterioration / decomposition of the constituent material of the colored portion 12 is prevented, the productivity of the color filter 1 is improved, and the solvent remains in the formed colored portion 12 effectively. 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 solvent is gently removed while preventing the convection of the color filter ink 2, and the surface of the color filter ink 2 In a flat state, the fluidity can be lost or reduced. 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 solvent 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. Thereby, the solvent 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 solvent which could not be removed by the first heat treatment can be completely removed. In this step, when the color filter ink 2 is cured by reacting a resin material (curable resin material), the color filter ink 2 fixed in a flat state in the first heat treatment is used. It can be efficiently cured in that shape.

The time for the second heat treatment is not particularly limited, but is preferably 25 minutes or more and 150 minutes or less, and more preferably 30 minutes or more and 100 minutes or less.
Further, in this step, for example, treatment such as irradiation with active energy rays or placing the substrate 11 to which the color filter ink 2 is applied in a reduced pressure environment may be performed.
By irradiating 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 effect on the substrate 11 and the like can be prevented more reliably. As the active energy ray, light beams having various wavelengths, for example, ultraviolet rays, X-rays, g-rays, i-rays, excimer lasers and the like can be used.

  Further, by placing the substrate 11 provided with the color filter ink 2 in a reduced pressure environment (depressurization treatment), the solvent can be removed more efficiently, or the colored portion in the pixel (cell) can be removed. Even when the shape can be surely preferable, or even when the heating temperature is relatively low, the solvent can be reliably removed, and the substrate 11, the colored portion 12 to be formed, etc. The effects of preventing the occurrence of adverse effects can be obtained more reliably. Moreover, a colored part can be more efficiently formed by using heat processing and pressure reduction processing together.

<Image display device>
Next, a preferred embodiment of a liquid crystal display device that is an image display device (electro-optical device) having the color filter 1 will be described.
FIG. 4 is a cross-sectional view showing a preferred embodiment of the liquid crystal display device. As shown in the figure, the liquid crystal display device 60 includes a color filter 1, a substrate (opposite substrate) 66 disposed on the side of the color filter 1 on which the colored portion 12 is provided, a color filter 1 and a substrate 66. And a polarizing plate 67 provided on the side opposite to the surface of the substrate 11 of the color filter 1 facing the liquid crystal layer 62 (lower side in FIG. 4). And a polarizing plate 68 provided on the side of the substrate 66 opposite to the surface facing the liquid crystal layer 62 (upper side in FIG. 4). 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.

  Since the color filter 1 of the present invention is excellent in heat resistance and the like, when forming an electrode (the common electrode 61 in the illustrated configuration) on the color filter 1 at the time of manufacture (particularly, formed by vapor phase film formation). In this case, discoloration of the colored portion 12 is surely prevented, and denaturation and deterioration of the colored portion 12 are prevented, and the adhesion between the color filter 1 and the electrode (common electrode 61) is particularly excellent. And the voltage holding ratio (VHR) can be improved.

  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. 4). 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. 4).

  As described above, since the colored portion 12 is formed using the color filter ink 2 (color filter ink set) of the present invention, the occurrence of uneven color and uneven density is effectively prevented, Variations in characteristics between colors and between pixels are suppressed. As a result, in the liquid crystal display device 60, it is possible to stably display an image in which color unevenness, density unevenness, and the like at each part are suppressed. Moreover, since the coloring part 12 is formed using the color filter ink of the present invention, it is excellent in contrast ratio and brightness.

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

FIG. 6 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. 7 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, the connection with an external device is also shown in a simplified manner.
Here, an ordinary camera sensitizes a silver salt photographic film with a light image of a subject, whereas a digital still camera 1300 photoelectrically converts a light image of a subject with an image sensor such as a CCD (Charge Coupled Device). An imaging signal (image signal) is generated.

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

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

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

  The electronic apparatus 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, video phone, security TV monitor , Electronic binoculars, POS terminals, devices equipped with touch panels (for example, cash dispensers of financial institutions, automatic ticket vending machines), medical devices (for example, electronic thermometers, blood pressure monitors, blood glucose meters, electrocardiographic display devices, ultrasonic diagnostic devices, endoscopy) Mirror display device), Group detector, various measuring instruments, gages (e.g., gages for vehicles, aircraft, and ships), a flight simulator, various monitors such, can be applied to the projection type display device such as a projector. In particular, televisions have a remarkable tendency to increase the size of display 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. That is, when applied to an electronic device having a large display unit as described above, the effects of the present invention are more remarkably exhibited.

As mentioned above, although this invention was demonstrated based on suitable embodiment, this invention is not limited to these.
For example, in the above-described embodiment, after applying the color filter ink corresponding to the colored portion of each color into the cell, the solvent is removed from the color filter ink of each color in the cell at once, and the resin material is removed. Although what was hardened | cured, ie, the colored part formation process (curing process) was demonstrated as performing only once, the ink provision process and the colored part formation process may be repeatedly performed corresponding to each color.

In addition, each part of the color filter, the image display device, and the electronic device can be replaced with any one that exhibits the same function, or other configurations can be added. For example, in the 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.
In the above-described embodiment, the case where the color filter ink set includes three types (three colors) of color filter inks has been mainly described. However, the color filter inks constituting the color filter ink set are not described. The number and type (color) are not limited to those described above. For example, in the present invention, the color filter ink set may include four or more color filter inks.

Next, specific examples of the present invention will be described.
[1] Synthesis of polymer (Synthesis Example 1)
In a reaction vessel (flask) equipped with a stirrer, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer, 180 parts by weight of diethylene glycol monobutyl ether acetate as a solvent (solvent) was added and heated to 85 ° C. Subsequently, in the flask, the monomer component (compound) a2 represented by the above formula (2) a2: 129 parts by weight, the monomer component (compound) represented by the above formula (3) a3: 100 weights. Parts, monomer component (compound) a4: 141 parts by weight represented by the above formula (4), azobisdimethylvaleronitrile as a radical initiator: 64 parts by weight in diethylene glycol monobutyl ether acetate: 386 parts by weight The solution was added dropwise over 5 hours using a dropping pump, and further aged for 3 hours.

Thereafter, the compound represented by the following formula (30) in the flask (however, R ^{1 to} R ⁴ in the formula (30) are all methyl groups, R ⁵ and R ⁶ are all n-butyl groups, and n is 2) and sulfuric acid, and the reaction is carried out in a state heated to 40 ° C., whereby the monomer component a1-1 represented by the following formula (31) and the simple substance represented by the formula (2) As a polymer A represented by the following formula (32) including a monomer component a2, a monomer component a3 represented by the formula (3), and a monomer component a4 represented by the formula (4) Polymer A1 was obtained.

(Synthesis Examples 2 to 6)
The above synthesis examples except that the type and amount of each component (including solvent (solvent)) used in the synthesis of the polymer were changed and adjusted, and the composition and weight average molecular weight of the polymer were changed as shown in Table 1. The same operation as 1 was performed. As a result, five types of polymers (polymers A2 to A6) were obtained.
(Synthesis Example 7)
A reaction vessel (flask) equipped with a stirrer, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer was charged with 100 parts by weight of diethylene glycol monobutyl ether acetate as a solvent (solvent) 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 to include the monomer components m1, m2, and m3 and represented by the above formula (28). A polymer M1 as a combined M was obtained.
(Synthesis Examples 8 to 14)
The same operation as in Synthesis Example 7 except that the solvent (solvent) used in the synthesis of the polymer, the types of monomer components, the ratio of each component were adjusted, and the composition of the polymer was changed as shown in Table 1. Went. As a result, seven types of polymers M (polymers M2 to M8) were obtained.

(Synthesis Example 15)
In a reaction vessel (flask) equipped with a stirrer, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer, 314 parts by weight of diethylene glycol monobutyl ether acetate as a solvent (solvent) was added and heated to 90 ° C. Subsequently, 2,2′-azobis (isobutyronitrile) (AIBN) as a radical initiator: 20 parts by weight and diethylene glycol monobutyl ether acetate (solvent): 30 parts by weight were added to the flask. The monomer component (compound) represented by the above formula (11) x1: 180 parts by weight, the monomer component (compound) represented by the above formula (12) x2: 90 parts by weight, the above formula (13) Monomer component (compound) x3: 15 parts by weight, monomer component (compound) x4: 15 parts by weight represented by the above formula (14), 2,2′-azobis (isobutyronitrile) ) (AIBN): A solution prepared by dissolving 50 parts by weight of diethylene glycol monobutyl ether acetate: 200 parts by weight was added dropwise using a dropping pump over 5 hours, and further aged for 4 hours. Then, it cooled to room temperature and obtained the polymer X1 as the polymer X represented by the said Formula (19) including the monomer components x1, x2, x3, x4.
(Synthesis Examples 16-22)
The same operation as in Synthesis Example 15 was performed except that the type of solvent (solvent) used in the synthesis of the polymer and the ratio of each component were adjusted and the composition of the polymer was changed as shown in Table 1. As a result, seven types of polymers X (polymers X2 to X8) were obtained.

(Synthesis Example 23)
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) y1: 200 parts by weight represented by the formula (15), monomer component (compound) y2 represented by the formula (16): 100 parts by weight, 2,2′- A solution obtained by dissolving 50 parts by weight of azobis (isobutyronitrile) (AIBN) in 200 parts by weight of diethylene glycol monobutyl ether acetate was added dropwise over 5 hours using a dropping pump, and the mixture was further aged for 4 hours. Then, it cooled to room temperature and obtained the polymer Y1 as the polymer Y containing the monomer components y1 and y2 and represented by the said Formula (20).
(Synthesis Examples 24 and 25)
The same operation as in Synthesis Example 23 was performed except that the kind 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 Y (polymers Y2 and Y3) were obtained.

In Table 1, the ratio of each monomer component which comprises each polymer synthesize | combined by the synthesis examples 1-25, and the weight average molecular weight Mw of each polymer were shown collectively. In Table 1, a1-1 is represented by the above formula (31), a1-2 is represented by the following formula (33), and a1-3 is represented by the following formula (34). A1-4 is represented by the following formula (35), a2 is represented by the above formula (2), and a3 is represented by the above formula (3). A4 is represented by the above formula (4), a5 is represented by the above formula (5), and a6 is represented by the above formula (6). A7 is represented by the following formula (36), A1 is represented by the above formula (32), and A2 is represented by the following formula (37). A3 is represented by the following formula (38), A4 is represented by the following formula (39), and A5 is represented by the following formula (40). There, A6 is represented by the following formula (41). In Table 1, 2- [O- (1′-methylpropylideneamino) carboxyamino] ethyl methacrylate (= 2- (1-methylpropylideneaminooxycarbonylaminoethyl) methacrylate) is represented by “m1a”. , 2- (3,5-dimethylpyrazol-1-yl) carbonylaminoethyl methacrylate is denoted by “m1b” and 2- (3,5-dimethylpyrazol-1-yl) carbonylaminoethyl acrylate is denoted by “m1c”. Methacrylic acid is indicated by “m2a”, acrylic acid is indicated by “m2b”, stearyl methacrylate is indicated by “m3a”, behenyl methacrylate is indicated by “m3b”, palmityl acrylate is indicated by “m3c”, Ceryl methacrylate is indicated by “m3d”, methyl methacrylate is indicated by “m4a”, Ethyl crylate 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. A mixture of 2.1.0 ^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 above formulas (37) to (41), a, b, c, and d each independently represent a positive number of 1 or more. In addition, the polymers synthesized as described above all had a dispersity (weight average molecular weight Mw / number average molecular weight Mn) in the range of 1 or more and 3 or less.

[2] Preparation of color filter ink (color filter ink set) (Example 1)
C. I. Solvent Red 24 (magenta dye), C.I. I. Solvent yellow 114 (yellow dye), diethylene glycol monobutyl ether acetate (solvent), diethylene glycol mononormal butyl ether (solvent), polymer A1, polymer M1, polymer X1 and polymer Y1 are mixed to produce a red color. A filter ink (R ink) was obtained.
In addition, the color filter ink (G ink) and the blue color filter ink (B ink) are the same as the red color filter ink except that the type of dye 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.

(Examples 2-9)
A color filter ink (ink set) was prepared in the same manner as in Example 1 except that the type and content of the color filter ink material were changed as shown in the table.
(Comparative Examples 1 and 2)
A color filter ink (ink set) was prepared in the same manner as in Example 1 except that the type and content of the color filter ink material were changed as shown in the table.

Tables 2 and 3 collectively show the types and contents of the components of the color filter ink in each of the above Examples and Comparative Examples. In the table, C.I. I. Solvent Blue 70 (cyan dye) was added to A1, C.I. I. Solvent Red 24 (magenta dye) was converted to A2, C.I. I. Solvent Yellow 114 (yellow dye) was changed to A3, C.I. I. Pigment Red 177 (red pigment) is PR177, C.I. I. Pigment Green 36 (green pigment) is changed to PG36, C.I. I. Pigment Blue 15: 6 (blue pigment) is PB15: 6, diethylene glycol monobutyl ether acetate is “S1”, 1,3-butylene glycol diacetate is “S2”, 2- (2-methoxy-1-methylethoxy) -1 -"S3" for methyl ethyl acetate, "S4" for bis (2-butoxyethyl) ether, "S5" for ethyl octoate, "S6" for diethylene glycol mono-normal butyl ether, "S7" for triethylene glycol mono-normal butyl ether, Ethyl 3-ethoxypropionate was designated as “S8” and triethylene glycol butyl methyl ether was designated as “S9”.
In addition, the viscosity at 25 ° C. of the color filter ink of each of the above examples measured according to JIS Z8809 using a vibration viscometer is in the range of 5 mPa · s to 11 mPa · s. Value.

[3] Stability evaluation of droplet discharge (Evaluation of discharge stability)
[3.1] Evaluation of landing position accuracy Prepared are a droplet discharge device as shown in FIG. 3 installed in a chamber (thermal chamber), and an ink set for the color filter of each of the examples and comparative examples, and drive of the piezo element. With the waveform optimized, each ink was continuously ejected with 1500000 droplets (1500000 droplets) from each nozzle of the droplet ejection head. For the 1500,000 droplets ejected from the designated nozzle near the center of the droplet ejection head, the average value of the deviations d from the center aiming position of the center position of each landed droplet is obtained, and the following five steps Evaluation was performed according to the criteria of As the average value of the shift amount d, the average value of the values obtained for the three colors of ink was used. It can be said that the smaller the value is, the more effectively the occurrence of flight bending is prevented.

A: The average value of the shift amount d is less than 0.05 μm.
B: The average value of the shift amounts d is 0.05 μm or more and less than 0.10 μm.
C: The average value of the shift amounts d is 0.10 μm or more and less than 0.13 μm.
D: The average value of the shift amount d is 0.13 μm or more and less than 0.16 μm.
E: The average value of the shift amounts d is 0.16 μm or more.

[3.2] Stability evaluation of droplet discharge amount Prepared are a droplet discharge device as shown in FIG. 3 installed in a chamber (thermal chamber) and an ink set for a color filter of each of the examples and comparative examples, With the driving waveform of the piezo element optimized, 2000,000 (2,000,000 drops) of droplets were continuously discharged from each nozzle of the droplet discharge head for each ink. For the two specified nozzles on the left and right ends of the droplet discharge head, the total weight of the discharged droplets is obtained, and the absolute value ΔW [ng] of the difference between the average discharge amounts of the droplets discharged from the two nozzles is calculated. Asked. A ratio (ΔW / W _T ) of ΔW with respect to the target discharge amount W _T [ng] of the droplet was obtained and evaluated according to the following five-stage criteria. As the value of [Delta] W / W _T is small, it can be said that the greater the stability of the droplet discharge amount.

A: The value of ΔW / _{W T} is less than 0.050.
B: The value of ΔW / _{W T} is less than 0.050 than 0.250.
C: The value of ΔW / _{W T} is less than 0.250 than 0.550.
D: The value of ΔW / _{W T} is less than 0.550 than 0.780.
E: The value of ΔW / _{W T} is 0.780 or more.

[3.3] Evaluation of intermittent printing performance A droplet discharge device as shown in FIG. 3 installed in a chamber (thermal chamber) and the color filter ink sets of the above examples and comparative examples are prepared to drive the piezoelectric element. With the waveform optimized, for each ink, 10000 droplets (10000 droplets) were continuously discharged from each nozzle of the droplet discharge head, and then the droplet discharge was interrupted for 180 seconds (1 Sequence eyes). Thereafter, similarly, the operation of continuously discharging the droplets and interrupting the discharge of the droplets were repeated. For the specified nozzle near the center of the droplet discharge head, the average weight W ₁ [ng] of the droplets discharged in the first sequence and the average weight W ₁₀₀ [ng] of the droplets discharged in the 100th sequence And asked. Then, the ratio (| W ₁ −W ₁₀₀ | / W _T ) of the absolute value of the difference between W ₁ and W ₁₀₀ to the target discharge amount W _T [ng] of the droplet is obtained, and the following five criteria are used. ,evaluated. | _W 1 _-W 100 | as the value of / _{W T} is small, it can be said to be excellent in intermittent printing performance (stability of the droplet discharge quantity).

_A: | _{W 1 -W} 100 | value of / _{W T} is less than 0.035.
_B: | _{W 1 -W} 100 | values of / _{W T} is less than 0.035 or 0.090.
_C: | _{W 1 -W} 100 | values of / _{W T} is less than 0.090 or 0.380.
_D: | _{W 1 -W} 100 | value of / _{W T} is less than 0.380 than 0.630.
_E: | _{W 1 -W} 100 | value of / _{W T} is 0.630 or more.

[3.4] Continuous Discharge Test Using a droplet discharge apparatus as shown in FIG. 3 installed in a chamber (thermal chamber), the color filter ink sets of the above examples and comparative examples, 25 ° C., 40% In a RH environment, each droplet constituting the color filter ink set was discharged by continuously operating the droplet discharge device for 480 hours.

  The nozzle clogging rate ([(number of clogged nozzles) / (total number of nozzles)] × 100) obtained after continuous operation is found and the nozzles are clogged. With respect to the above, it was examined whether or not clogging can be eliminated by a cleaning member made of a plastic material. The results were evaluated according to the following five-step criteria. As the value of the occurrence rate of nozzle clogging, the average value of the values obtained for the three color inks was adopted.

A: No nozzle clogging occurs.
B: The occurrence rate of nozzle clogging is less than 0.4% (excluding zero), and clogging can be eliminated by cleaning.
C: The occurrence rate of nozzle clogging is 0.4% or more and less than 0.8%, and clogging can be eliminated by cleaning.
D: The occurrence rate of nozzle clogging is 0.8% to less than 1.1%, and clogging can be eliminated by cleaning.
E: The occurrence rate of nozzle clogging is 1.1% or more, or clogging cannot be eliminated by cleaning.
In addition, said evaluation was performed on the same conditions about each Example and the comparative example.

[4] Storage stability evaluation of color filter ink (long-term stability evaluation)
The color filter inks of the respective examples and comparative examples were left to stand for 70 days in an environment of 40 ° C., then visually observed and evaluated according to the following four criteria.
A: No change in appearance is observed before heating.
B: A slight change in appearance is observed before heating.
C: Appearance change is clearly recognized before heating.
D: A change in appearance is noticeably observed before heating.

[5] Production of color filter A color filter was produced in the following manner using the color filter ink (ink set) prepared in each of the above Examples and Comparative Examples.
First, a soda glass substrate (G5 size: 1100 × 1300 mm) on which a silica (SiO ₂ ) film for preventing elution of sodium ions was formed on both surfaces was prepared and subjected to a cleaning treatment.

Next, the radiation-sensitive composition for forming partition walls containing carbon black was applied to the entire surface of one of the cleaned substrates to form a coating film.
Next, prebaking was performed under the conditions of heating temperature: 110 ° C. and heating time: 120 seconds.
Thereafter, irradiation with radiation is performed through a photomask to perform post-exposure baking (PEB), followed by development using an alkaline developer, and further by performing post-baking, thereby separating 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 FIG. 3, the 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-butyrolactone was performed, and a color filter as shown in FIG. 1 was obtained.
Using the method as described above, 9,000 color filters were produced using the color filter inks (ink sets) of each Example and Comparative Example.

[6] Evaluation of color filter The following evaluation was performed using each color filter obtained as described above.
[6.1] Flatness of the colored portion Of the color filters manufactured using the color filter inks (ink sets) of the respective Examples and Comparative Examples, a color filter manufactured for the 5000th sheet is prepared. did.
About these color filters, the difference (DELTA) D of the maximum height of a coloring part and minimum height was calculated | required using the stylus-type roughness meter (the Tencor company make, P-15), and it evaluated according to the following 5 steps | paragraphs of criteria. .

A: ΔD is less than 0.16 μm.
B: ΔD is 0.16 μm or more and less than 0.28 μm.
C: ΔD is 0.28 μm or more and less than 0.43 μm.
D: ΔD is 0.43 μm or more and less than 0.53 μm.
E: ΔD is 0.53 μm or more.

[6.2] Evaluation of contrast ratio Among the color filters manufactured using the color filter inks (ink sets) of the respective examples and comparative examples, the color filters manufactured for the 9000th sheet were used. A liquid crystal display device as shown in FIG. 4 was manufactured under the same conditions.
When these liquid crystal display devices are used, a red single color display, a green single color display, and a blue single color display are performed, and a single color display is not performed using a contrast tester (CT-1 manufactured by Aisaka Electric Co., Ltd.). The contrast ratio (CR) in comparison with was calculated and evaluated as follows.

In the case of a red single color display, evaluation was performed according to the following five-stage criteria.
A: CR is 3000 or more.
B: CR is 2500 or more and less than 3000.
C: CR is 2100 or more and less than 2500.
D: CR is 1800 or more and less than 2100.
E: CR is less than 1800.

In the case of green single color display, evaluation was performed according to the following five-stage criteria.
A: CR is 3900 or more.
B: CR is 3600 or more and less than 3900.
C: CR is 3300 or more and less than 3600.
D: CR is 2900 or more and less than 3300.
E: CR is less than 2900.

In the case of blue single color display, evaluation was performed according to the following five-step criteria.
A: CR is 3200 or more.
B: CR is 2800 or more and less than 3200.
C: CR is 2500 or more and less than 2800.
D: CR is 2300 or more and less than 2500.
E: CR is less than 2300.

[6.3] Color unevenness, density unevenness About the liquid crystal display devices of the respective examples and comparative examples manufactured in [6.2] above, in a dark room, red single color display, green single color display, blue single color display, Visual observation was performed in a state where white monochromatic display was performed, and the occurrence of color unevenness and density unevenness at each part was evaluated according to the following five-stage criteria.

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

[6.4] Voltage holding ratio of liquid crystal layer The liquid crystal display devices of the examples and comparative examples manufactured in the above [6.2] are prepared, and a voltage of 5 V is applied to the liquid crystal layer for 60 microseconds. After applying at a span of 16.9 milliseconds, the voltage holding ratio (VHR) after 16.9 milliseconds from the release of application, the voltage holding ratio measuring system for liquid crystal (product name “MZ1800” manufactured by Micronics) And measured according to the following four criteria.
A: VHR is 98% or more.
B: VHR is 95% or more and less than 98%.
C: VHR is 90% or more and less than 95%.
D: VHR is less than 90%.

[6.5] Characteristic difference among individuals Among the color filters manufactured using the color filter inks (ink sets) of the respective Examples and Comparative Examples, the first to 20th sheets and 8980 to 8980, respectively. A color filter manufactured for the 8999th sheet is prepared, and in a dark room, a red single color display, a green single color display, a blue single color display, and a white single color display are performed, and a spectrophotometer (MCPD3000, manufactured by Otsuka Electronics Co., Ltd.) is installed. The color was measured. From the results, for each example and comparative example, the color difference (in the Lab display system) that is the largest among the color filters manufactured in the 1st to 20th sheets and the 8980 to 8999th sheets (total of 40 color filters), respectively. Color difference ΔE) was determined and evaluated according to the following five-step criteria.

A: Color difference (ΔE) is less than 1.5.
B: Color difference (ΔE) is 1.5 or more and less than 2.7.
C: Color difference (ΔE) is 2.7 or more and less than 3.6.
D: Color difference (ΔE) is 3.6 or more and less than 4.6.
E: Color difference (ΔE) is 4.6 or more.

[6.6] Heat cycle test Among the color filters manufactured using the color filter inks (ink sets) of the respective Examples and Comparative Examples, the color filters manufactured for the 6021st to 6030th sheets were used. A liquid crystal display device as shown in FIG. 4 was manufactured under the same conditions.
Using these liquid crystal display devices, light leakage (white spots, bright spots) occurs when visual observation is performed in a dark room with red single color display, green single color display, and blue single color display. Confirmed that there is no.

Next, the color filter was removed from the liquid crystal display device.
Each removed color filter is placed in a 20 ° C. environment for 1.5 hours, then in a 55 ° C. environment for 2.5 hours, then in a 20 ° C. environment for 1.5 hours, and then at −20 ° C. It was left in the environment for 2.5 hours. Thereafter, the environmental temperature was returned again to 20 ° C., which was set as one cycle (8 hours), and this cycle was repeated 50 times in total (total 400 hours).

Thereafter, using these color filters, a liquid crystal display device as shown in FIG. 4 was assembled again.
Using these liquid crystal display devices, visual observation is performed in a dark room with red single color display, green single color display, and blue single color display, and the occurrence of light leakage (white spots, bright spots) is observed. The evaluation was made according to the following 6-step criteria.

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

[7] Evaluation of heat resistance Each color filter ink was applied on a 0.7 mm thick glass substrate by spin coating. The amount of ink applied was set so that the dry film thickness was 2.0 μm.
Next, these test pieces were heated at 220 ° C. for 1 hour in a clean oven.

Next, the color of the test piece subjected to the heat treatment at 220 ° C. was measured using a spectrophotometer (manufactured by Otsuka Electronics Co., Ltd., MCPD3000).
Thereafter, these test pieces were further heated at 250 ° C. for 1 hour in a clean oven.
Here, the color of the test piece subjected to the heat treatment at 250 ° C. was measured using a spectrophotometer (MCPD3000, manufactured by Otsuka Electronics Co., Ltd.).
From these results, the color difference (color difference ΔE in the Lab display system) before and after the heat treatment (heat treatment at 250 ° C.) was determined for each test piece and evaluated according to the following five-stage criteria.

A: Color difference (ΔE) is less than 0.9.
B: Color difference (ΔE) is 0.9 or more and less than 1.9.
C: Color difference (ΔE) is 1.9 or more and less than 2.5.
D: Color difference (ΔE) is 2.5 or more and less than 3.1.
E: Color difference (ΔE) is 3.1 or more.

[8] Evaluation of Colored Film Formed Using Color Filter Ink Using each color filter ink, a large number of test pieces (test plates) used for the following tests were prepared.
First, each ink was applied onto a glass substrate having a thickness of 0.7 mm by spin coating. The amount of ink applied was set so that the dry film thickness was 2.0 μm.
Next, pre-baking was performed on a 90 ° C. hot plate for 10 minutes. Thereafter, in a clean oven, post-baking was performed by heating at 200 ° C. for 30 minutes, and further post-baking was performed by heating at 240 ° C. for 30 minutes to obtain a test piece (test plate) having a colored film.

[8.1] Evaluation of light resistance The test pieces of the respective colors of the respective examples and comparative examples were measured using a spectrophotometer (MCPD3000, manufactured by Otsuka Electronics Co., Ltd.).
Next, in an environment of 40 ° C. and 60% RH, these test pieces were irradiated with light using a xenon fade meter, and then a spectrophotometer (manufactured by Otsuka Electronics Co., Ltd., MCPD3000) was used similarly. And measured the color. Irradiation conditions were 320 W / m ² × 120 hours. The black panel temperature at this time was 50 degreeC.

From these results, the color difference before and after light irradiation (color difference ΔE in the Lab display system) was determined for each test piece, and evaluated according to the following four criteria.
A: Color difference (ΔE) is less than 1.0.
B: Color difference (ΔE) is 1.0 or more and less than 2.8.
C: Color difference (ΔE) is 2.8 or more and less than 3.3.
D: Color difference (ΔE) is 3.3 or more.

[8.2] Evaluation of adhesion of ITO film First, the test pieces of the respective colors of the respective examples and comparative examples were immersed in isopropyl alcohol for 5 minutes, and then dried by isopropyl alcohol vapor and washed.
Thereafter, an ITO (indium tin oxide) film was formed to a thickness of 100 nm under a vacuum of 6 × 10 ⁻³ Torr at a substrate set temperature of 200 ° C.

After the heat resistance test at 160 ° C. for 60 minutes, the surface roughness (Ra) of the ITO film was measured by AFM and evaluated according to the following three-stage criteria. As the AFM, NanoScope IIIa manufactured by Nippon Bico Co., Ltd. was used.
A: No abnormality such as wrinkles or cracks was observed in the ITO film.
B: Several abnormalities such as wrinkles and cracks were observed in the ITO film.
C: Abnormalities such as wrinkles and cracks were observed on the entire surface of the ITO film.
These results are shown in Tables 4 and 5.

As is apparent from Tables 4 and 5, excellent results were obtained in the present invention, whereas satisfactory results were not obtained in the comparative example.
Moreover, when a commercially available liquid crystal television was disassembled and the liquid crystal display device part was replaced with one manufactured as described above, and the same evaluation as described above was performed, the same result as above was obtained.

  DESCRIPTION OF SYMBOLS 1 ... Color filter 11 ... Board | substrate 12 ... Colored part 12A ... 1st colored part 12B ... 2nd colored part 12C ... 3rd colored part 13 ... Partition (bank, light-shielding part) 14 ... Cell 2 ... Color filter ink DESCRIPTION OF SYMBOLS 3 ... Coating film 60 ... Liquid crystal display device 61 ... Common electrode 62 ... Liquid crystal layer 63, 64 ... Orientation film 65 ... Pixel electrode 66 ... Substrate (opposite substrate) 67, 68 ... Polarizing plate 100 ... Droplet discharge device 101 ... Tank 102 DESCRIPTION OF SYMBOLS ... Discharge scanning part 103 ... Droplet discharge means 104 ... 1st position control apparatus (moving means) 106 ... Stage 108 ... 2nd position control apparatus (moving means) 110 ... Tube 112 ... Control means 1000 ... Image display apparatus 1100 ... Personal Computer 1102 ... Keyboard 1104 ... Main body 1106 ... Display unit 1200 ... Mobile phone 120 DESCRIPTION OF SYMBOLS 2 ... Operation button 1204 ... Earpiece 1206 ... Mouthpiece 1300 ... Digital still camera 1302 ... Case (body) 1304 ... Light receiving unit 1306 ... Shutter button 1308 ... Circuit board 1312 ... Video signal output terminal 1314 ... Input / output for data communication Terminal 1430 ... TV monitor 1440 ... Personal computer

Claims (14)

A color filter ink used in the production of an ink jet color filter,
A color filter ink comprising a dye, a solvent, and a polymer A including a monomer component having an acrylic acid skeleton and having a partial structure represented by the following formula (1).

The color filter ink according to claim 1, wherein the polymer A contains a monomer component represented by the following formula (2).

The color filter ink according to claim 1, wherein the polymer A contains a monomer component represented by the following formula (3).

The color filter ink according to any one of claims 1 to 3, wherein the polymer A contains a monomer component represented by the following formula (4).

The color filter ink according to claim 1, wherein the polymer A includes a monomer component represented by the following formula (5).

The color filter ink according to any one of claims 1 to 5, wherein the polymer A contains a monomer component represented by the following formula (6).

The color filter ink includes a monomer component m1 represented by the following formula (21), a monomer component m2 having a carboxyl group or an acid anhydride group, and a monomer component m3 represented by the following formula (23). The color filter ink according to claim 1, comprising a polymer M containing:

The color filter ink includes a monomer component x1 represented by the following formula (11), a monomer component x3 represented by the following formula (13), and a monomer component x4 represented by the following formula (14). The color filter ink according to claim 1, comprising a polymer X containing:

The color filter ink according to any one of claims 1 to 8, wherein the color filter ink comprises a polymer Y containing a monomer component y1 represented by the following formula (15).

A color filter ink set comprising a plurality of inks used in the manufacture of color filters,
10. A color filter ink set, wherein at least one of the plurality of types of ink constituting the color filter ink set is the color filter ink according to any one of claims 1 to 9.   A color filter manufactured using the color filter ink according to claim 1.   A color filter manufactured using the color filter ink set according to claim 10.   An image display device comprising the color filter according to claim 11.   An electronic apparatus comprising the image display device according to claim 13.

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