JP2010079228A - Ink for color filter, method of manufacturing ink for color filter, ink set for color filter, color filter, image display device, and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inkjet ink for a color filter, which is excellent in dispersion stability of a pigment, maintains excellent ejection stability for a long period of time, and is suitably used for manufacturing a color filter that displays an image excellent in a contrast ratio while suppressing color non-uniformity and density non-uniformity in each part of the color filter and that shows excellent uniformity of characteristics in individual products as well as excellent durability. <P>SOLUTION: The inkjet ink comprises a pigment, a resin material and a dispersion medium, wherein the resin material contains polymers expressed by formula (11) (where a, b, c and d each independently represents an integer of 1 or more) and by formula (12) (where a, b and c each independently represents an integer of 1 or more). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

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

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

On the other hand, in recent years, a method of forming a colored layer of a color filter using an ink jet head (droplet discharge head) has been proposed (see, for example, Patent Document 1). In such a method, the discharge position of the droplets of the colored layer forming material (colored layer forming composition) can be easily controlled and waste of the colored layer forming composition can be reduced. The manufacturing cost can be reduced.

However, in the method of manufacturing a color filter using an inkjet head, when a droplet is ejected over a long period of time, the droplet ejection amount becomes unstable or the trajectory of the ejected 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 particular, such a problem has remarkably occurred when a material containing a pigment is used as a material for forming a colored layer. Also, the droplet discharge device (industrial use) used in the manufacture of color filters is completely different from that applied to printers (consumer use). For example, mass production or large workpieces (substrates) are used. Therefore, it is required to discharge a large amount of droplets over a long period of time. Since it is used under such harsh conditions, it tends to cause fluctuations in the discharge amount of liquid droplets compared to those for consumer use. However, if such fluctuations in the discharge amount occur, a large number of manufactured colors Variations in characteristics among the filters and variations in color density at each part of the color filter occur, and the reliability of the color filter as a product is significantly reduced.
Further, in order to ensure a wider color reproduction range and high contrast ratio in color filters, in recent years, there has been a tendency to use inks for color filters that have a high content of colorants. The higher the content of), the more prominent the above problems.

By the way, in general, since pigments are superior in characteristics such as light resistance and heat resistance, compared to dyes, pigments are used as colorants in color filter inks. However,
When a pigment is used as the colorant, the occurrence of the above problems becomes more prominent. In addition, when a pigment is used as a colorant, there is a significant problem that it is difficult to make the contrast of an image displayed using a manufactured color filter sufficiently excellent,
When many color filters were manufactured by the inkjet method, the contrast characteristics of the manufactured color filters were significantly reduced.
In recent years, liquid crystal display devices (LCDs) that perform color display have a tendency to increase the brightness of display images with the aim of further improving image quality. With such high brightness, color filters are also required to have improved durability.

JP 2002-372613 A

The object of the present invention is excellent in pigment dispersion stability, can maintain excellent discharge stability over a long period of time, suppresses color unevenness and density unevenness at each part, and displays an image with excellent contrast ratio To provide an inkjet color filter ink and ink set that can be suitably used for the manufacture of a color filter having excellent uniformity of characteristics among individuals and excellent in durability. To provide a production method capable of efficiently producing the color filter ink as described above, and to display an image with excellent contrast ratio, including pigments, suppressing color unevenness and density unevenness in each part. Providing a color filter having excellent uniformity of characteristics among individuals and excellent in durability, and an image table provided with the color filter. Device is to provide an electronic apparatus.

Such an object is achieved by the present invention described below.
The color filter ink of the present invention is a color filter ink used for producing a color filter by an inkjet method,
A pigment, a resin material, and a dispersion medium in which the pigment is dispersed;
The resin material includes a monomer component x1 represented by the following formula (1), a monomer component x2 represented by the following formula (2), and a monomer component x3 represented by the following formula (3): Polymer X containing monomer component x4 represented by the following formula (4), monomer component z1 represented by the following formula (5), and monomer component represented by the following formula (6) It contains the polymer Z containing z2 and the monomer component z3 represented by following formula (7), It is characterized by the above-mentioned.

As a result, the pigment has excellent dispersion stability, can maintain excellent discharge stability over a long period of time, can suppress color unevenness and density unevenness at each part, and can display an image with an excellent contrast ratio. Ink-jet color filter inks that can be suitably used for the manufacture of color filters that are excellent in uniformity of characteristics among individuals and excellent in durability can be provided.

In the color filter ink of the present invention, the content of the monomer component x1 in the total components constituting the polymer X is 30 to 90 wt%,
The content of the monomer component x2 in the total components constituting the polymer X is 5 to 60 wt.
%
The content of the monomer component x3 in the total components constituting the polymer X is 2 to 20 wt.
%
The content of the monomer component x4 in the total components constituting the polymer X is 2 to 20 wt.
% Is preferred.

As a result, the color filter ink can be made particularly excellent in high-temperature reactivity (long-term storage stability) and high-temperature reactivity. In addition, the colored portion (colored layer) formed using the color filter ink can have high flatness, and color unevenness in an image displayed using the color filter can be more effectively generated. Can be prevented. In addition, the solvent resistance of the colored portion (colored layer) formed using the color filter ink can be made particularly excellent, and the reliability of the produced color filter can be made particularly high. .

In the color filter ink of the present invention, the content of the monomer component z1 in the total components constituting the polymer Z is 50 to 95 wt%,
The content of the monomer component z2 in the total components constituting the polymer Z is 3 to 35 wt.
%
The content of the monomer component z3 in the total components constituting the polymer Z is 2 to 30 wt.
% Is preferred.

Thereby, about a resin material, below a predetermined temperature, it does not advance hardening reaction substantially,
Characteristics that allow the curing reaction to proceed efficiently at higher temperatures (switching characteristics)
In addition, the discharge stability of the color filter ink, the hardness of the colored portion to be formed, and the like can be made particularly excellent, and the dispersion stability of the pigment in the color filter ink can be made particularly excellent. it can. In addition, 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 color unevenness in an image displayed using the color filter, Generation of uneven density and a decrease in contrast ratio can be more effectively prevented.

In the color filter ink of the present invention, the content of the polymer X in the color filter ink is C _X [wt%], and the content of the polymer Z in the color filter ink is C _Z [wt%]. It is preferable that the relationship of 0.3 ≦ C _X / C _Z ≦ 9.0 is satisfied.
As a result, the color filter ink should have excellent stability over time (long-term storage stability), high temperature reactivity, and durability and reliability of the manufactured color filter. In addition, color unevenness and the like in a color filter manufactured using the color filter ink can be more effectively prevented.

In the color filter ink of the present invention, the polymer X has a weight average molecular weight of 1,000 to 1,000.
It is preferable that it is 50000.
As a result, it is possible to make the color filter ink stable over time (long-term storage stability), the discharge stability of the color filter ink, and the color filter productivity sufficiently. Furthermore, the flatness of the colored portion formed using the color filter ink can be made more reliable, and the occurrence of color unevenness or the like in the image displayed using the color filter can be more effectively achieved. Can be prevented.

In the color filter ink of the present invention, the polymer Z has a weight average molecular weight of 5,000 to 5,000.
It is preferable that it is 50000.
As a result, it is possible to make the color filter ink stable over time (long-term storage stability), the discharge stability of the color filter ink, and the color filter productivity sufficiently. Furthermore, the flatness of the colored portion formed using the color filter ink can be made more reliable, and the occurrence of color unevenness or the like in the image displayed using the color filter can be more effectively achieved. Can be prevented.

In the color filter ink of the present invention, 1,3-butylene glycol diacetate, bis (2-butoxyethyl) ether, 2- (2-methoxy-1-methylethoxy) -1-methylethyl acetate is used as the dispersion medium. And one or more selected from the group consisting of diethylene glycol monobutyl ether acetate.
Thereby, the dissolved state of the polymer X and the polymer Z in the color filter ink can be made more uniform, and the discharge stability of the color filter ink becomes particularly excellent. In addition, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent.

In the color filter ink of the present invention, C.I. I. Pigment red 254, C.I. I. Pigment red 177, C.I. I. Pigment green 58, C.I. I.
Pigment blue 15: 6, C.I. I. Pigment violet 23, C.I. I. Pigment yellow 138, C.I. I. It is preferable to include one or more selected from the group consisting of CI Pigment Yellow 150 and derivatives thereof.
Thereby, the effect by using the polymer X and the polymer Z is exhibited more notably. Moreover, the color reproduction range and light resistance of the produced color filter can be made particularly excellent.

The method for producing the color filter ink of the present invention is represented by the monomer component z1 represented by the following formula (5), the monomer component z2 represented by the following formula (6), and the following formula (7). Monomer component z3
A polymer Z solution preparation step of preparing a polymer Z solution in which a polymer Z containing
A fine dispersion step of adding a pigment to the polymer Z solution, adding inorganic beads in multiple stages and performing fine dispersion treatment to obtain a pigment dispersion;
The pigment dispersion, the monomer component x1 represented by the following formula (1), the monomer component x2 represented by the following formula (2), and the monomer component x3 represented by the following formula (3) And a polymer X mixing step of mixing the polymer X containing the monomer component x4 represented by the following formula (4).

As a result, the pigment has excellent dispersion stability, can maintain excellent discharge stability over a long period of time, can suppress color unevenness and density unevenness at each part, and can display an image with an excellent contrast ratio. Production method capable of efficiently producing ink for an ink-jet color filter, which can be suitably used for producing a color filter excellent in uniformity of characteristics among individuals and excellent in durability. In particular, it is possible to provide a production method capable of efficiently producing an ink for a color filter while effectively preventing deterioration and modification of the resin material.

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 manufacture of color filters,
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, the pigment has excellent dispersion stability, can maintain excellent discharge stability over a long period of time, can suppress color unevenness and density unevenness at each part, and can display an image with an excellent contrast ratio. And an ink set for an ink-jet color filter that can be suitably used for producing a color filter having excellent uniformity of characteristics among individuals and excellent durability.

The color filter of the present invention is manufactured using the color filter ink of the present invention.
As a result, it is possible to display an image with excellent contrast ratio, including color pigments, density unevenness, etc. in each part, including pigments, excellent uniformity of characteristics among individuals, and durability. Can provide an excellent color filter.

The color filter of the present invention is manufactured using the color filter ink set of the present invention.
As a result, it is possible to display an image with excellent contrast ratio, including color pigments, density unevenness, etc. in each part, including pigments, excellent uniformity of characteristics among individuals, and durability. Can provide an excellent color filter.

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, etc. at each part of the display unit are suppressed, an image with excellent contrast ratio can be displayed, excellent uniformity of characteristics among individuals, and durability An excellent image display device can be provided.
The image display device of the present invention is preferably a liquid crystal panel.
As a result, color unevenness, density unevenness, etc. at each part of the display unit are suppressed, an image with excellent contrast ratio can be displayed, excellent uniformity of characteristics among individuals, and durability An excellent image display device can be provided.
An electronic apparatus according to the present invention includes the image display device according to the present invention.
As a result, color unevenness, density unevenness, etc. at each part of the display unit are suppressed, an image with excellent contrast ratio can be displayed, excellent uniformity of characteristics among individuals, and durability An excellent electronic device can be provided.

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

<Pigment>
The color filter usually has a plurality of different colored portions (generally, three colored portions corresponding to RGB), and the colored portion is generally composed of a material containing a colorant. As the colorant, a pigment or a dye can be used. Among these, the pigment is advantageous in improving the light resistance and heat resistance of the formed color filter (colored portion). For this reason, in this invention, a pigment is used as a coloring agent. Conventionally, when the color filter ink contains a pigment, the droplet discharge stability is particularly low. In the color filter ink, the pigment is stably dispersed over a long period of time. It is difficult to stably produce a color filter with excellent contrast etc. over a long period of time.
For color filters, it is difficult to sufficiently increase the productivity of color filters because it is necessary to frequently replace ink for color filters used for droplet ejection and replacement of color filter ink in droplet ejection devices. With the replacement and replacement of the ink, there has been a problem that a characteristic difference between the lots of the color filter to be produced is likely to occur, but in the present invention, as described in detail later, Occurrence can be reliably prevented.

Examples of the pigment include C.I. I. Pigment Red 1, 2, 3, 4, 5, 6, 7, 8,
9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 19, 21, 22, 23, 30
, 31, 32, 37, 38, 40, 41, 42, 48: 1, 48: 2, 48: 3, 48:
4, 49: 1, 49: 2, 50: 1, 52: 1, 53: 1, 57, 57: 1, 57: 2,
58: 2, 58: 4, 60: 1, 63: 1, 63: 2, 64: 1, 81, 81: 1, 83
, 88, 90: 1, 97, 101, 102, 104, 105, 106, 108, 108:
1,112,113,114,122,123,144,146,149,150,15
1,166,168,170,171,172,174,175,176,177,17
8, 179, 180, 185, 187, 188, 190, 193, 194, 202, 20
6,207,208,209,215,216,220,224,226,242,24
3, 245, 254, 255, 264, 265; I. Pigment Green 7, 36,
15, 17, 18, 19, 26, 50, 58; I. Pigment Blue 1,15,15
: 1, 15: 2, 15: 3, 15: 4, 15: 6, 17: 1, 18, 60, 27, 28,
29, 35, 36, 60, 80; C.I. I. Pigment Yellow 1, 3, 12, 13, 14
, 15, 16, 17, 20, 24, 31, 34, 35, 35: 1, 37, 37: 1, 42
, 43, 53, 55, 60, 61, 65, 71, 73, 74, 81, 83, 93, 94,
95, 97, 98, 100, 101, 104, 106, 108, 109, 110, 113
, 114, 116, 117, 119, 120, 126, 127, 128, 129, 138
, 139, 150, 151, 152, 153, 154, 155, 156, 157, 166
, 168, 175, 180, 184, 185; I. Pigment Violet 1, 3,
14, 16, 19, 23, 29, 32, 36, 38, 50; I. Pigment Orange 1, 5, 13, 14, 16, 17, 20, 20: 1, 24, 34, 36, 38, 40, 4
3, 46, 49, 51, 61, 63, 64, 71, 73, 104; I. Pigment Brown 7, 11, 23, 25, 33; I. And CI pigment blacks 1 and 7 and derivatives thereof.

Among the above pigments, the color filter ink is C.I. I. Pigment Red 254
, C.I. I. Pigment red 177, C.I. I. Pigment green 58, C.I. I. Pigment blue 15: 6, C.I. I. Pigment violet 23, C.I. I. Pigment yellow 138, C.I. I. It is preferable to include one or more selected from the group consisting of CI Pigment Yellow 150 and derivatives thereof. Thereby, the effect by using the polymer X and the polymer Z is exhibited more notably. Moreover, the color reproduction range and light resistance of the produced color filter can be made particularly excellent.

In particular, the color filter ink is used as a pigment (red pigment) as C.I. I. Pigment red 177 and its derivatives, and / or C.I. I. When the pigment red 254 and derivatives thereof are included, the color developability of the color filter ink (red color filter ink) can be made particularly excellent. Moreover, the effect by using together with the resin material is more remarkably exhibited, and the dispersion stability of the pigment particles in the color filter ink can be made excellent. As a result, an increase in thixotropic property of the color filter ink at the time of forming the colored portion can be suppressed, and the discharge stability of the color filter ink is particularly excellent when the ink is applied to the cells. be able to.
C. I. Pigment Red 177 derivatives, C.I. I. When the pigment red 254 derivative contains a compound (derivative) represented by the following formula (8) or the following formula (9), the above-described effects are more remarkably exhibited.

In particular, the color filter ink is used as a pigment (green pigment) as C.I. I. When it contains CI Pigment Green 58 (brominated zinc phthalocyanine pigment), the color developability of the color filter ink (green color filter ink) can be made particularly excellent. In addition, C.I. I. Although Pigment Green 58 has a feature of excellent brightness, conventionally, it has been a very difficult material to stably disperse.
However, the inventor has disclosed C.I. I. Even when Pigment Green 58 is included,
It has been found that by using together the resin materials (polymer X and polymer Z) which will be described in detail later, the dispersion stability in the color filter ink can be made excellent. As a result, the color developing property of the color filter ink can be further improved, and the increase in thixotropic property of the color filter ink due to the high concentration of the pigment at the time of forming the colored portion can be suppressed. Can do. Further, the long-term dispersion stability of the pigment in the color filter ink (storability of the color filter ink) and the discharge stability of the color filter ink can be made particularly excellent.

In addition, the present inventor I. It has been found that even when Pigment Green 58 is included, the dispersion stability in the color filter ink can be further improved by simultaneously including a sulfonated pigment derivative as a secondary pigment. As a result, the color developability of the color filter ink can be further improved,
At the time of forming the colored portion, an increase in thixotropic property of the color filter ink due to the high concentration of the pigment can be further effectively suppressed. Further, the long-term dispersion stability of the pigment in the color filter ink (storability of the color filter ink) and the discharge stability of the color filter ink can be further improved.

As a pigment, C.I. I. In the case of including Pigment Green 58 and a sulfonated pigment derivative, a compound (derivative) represented by the following formula (10) is used as the sulfonated pigment derivative.
It is preferable to contain. Thereby, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent, and an image with a better contrast can be displayed on the manufactured color filter.

C. I. Pigment Green 58 and the above pigment derivative (sulfonated pigment derivative)
The content of the pigment derivative (sulfonated pigment derivative) in the color filter ink is not particularly limited. I. Pigment Green 58 (main pigment): 10
The amount is preferably 2 to 32 parts by weight and more preferably 7 to 28 parts by weight with respect to 0 part by weight. Thereby, the dispersion stability of the pigment particles in the color filter ink can be made excellent. Further, the contrast ratio and brightness of the manufactured color filter can be made particularly excellent.

In particular, the color filter ink is used as a pigment (blue pigment). I. Pigment blue 15: 6 and C.I. I. When the pigment violet 23 is included, the color developability of the color filter ink (blue color filter ink) can be made particularly excellent. In addition, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent.

Further, the average particle diameter of the pigment is preferably 10 to 200 nm, and more preferably 20 to 180 nm. As a result, the durability (light resistance) of the color filter manufactured using the color filter ink while sufficiently improving the dispersion stability of the pigment in the color filter ink and the discharge stability of the color filter ink. Etc.) can be made sufficiently excellent, and the color developability, contrast, etc. in the color filter can be made particularly excellent.

The pigment content in the color filter ink is preferably 2 to 25 wt%, more preferably 3 to 20 wt%. When the pigment 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 pigment can be used for clearer image display. Conventionally, when pigment is contained at such a relatively high concentration, the ejection stability is particularly low, and when the ink droplets for color filter are ejected, the flight curve and the droplet ejection amount In particular, problems such as destabilization of the system were likely to occur. Further, conventionally, a large substrate (for example, G
5 or more), when a colored portion is formed by ejecting droplets on the surface, the occurrence of defective products due to variations in the ejection amount at each site in the surface becomes remarkable, and the productivity of the color filter is significantly reduced. there were. On the other hand, in the present invention, even when the pigment is contained at a relatively high concentration, as described in detail later, it is possible to reliably prevent the occurrence of the above-described problems, and the manufactured color filter Thus, it is possible to reliably prevent the occurrence of color unevenness, density unevenness, etc., and variation in characteristics among individuals, and a color filter can be manufactured with excellent productivity.
That is, when the color filter ink contains a relatively high concentration of pigment as described above,
The effect of the present invention is more remarkably exhibited. In addition, the durability of the manufactured color filter can be made particularly excellent.

<Resin material>
The color filter ink generally contains a resin material (binder resin) for the purpose of improving the adhesion of the formed colored portion to the substrate. In addition, the resin material is required to have solvent resistance in order to prevent adverse effects due to chemical application and cleaning in the subsequent step of the ink application step by the inkjet method. However, with conventional color filter inks, it has been difficult to sufficiently improve the durability of the color filter (colored portion).
In addition, with conventional color filter inks, it is difficult to stably disperse the pigment over a long period of time, and when the liquid droplet is discharged over a long period of time by the ink jet method, the amount of discharged liquid droplets is insignificant. There are cases where problems such as stabilization or a change in the trajectory of the ejected liquid droplet (so-called flight curve occurs), making it impossible to land the liquid droplet 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, with conventional color filter inks, it is difficult to stably disperse pigments over a long period of time. Therefore, replacement of color filter inks used for droplet ejection, and color filter in a droplet ejection device It is difficult to sufficiently increase the productivity of color filters because it is necessary to replace the ink frequently, and the characteristics of lots of color filters to be manufactured with the replacement and replacement of color filter inks Differences are likely to occur.

In addition, in the production of a color filter by the ink jet method, generally, after discharging droplets into a cell provided on a substrate, the dispersion medium 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 of the medium, causing unintentional irregularities on the surface of the formed colored part, which is displayed using the color filter. Color unevenness in the resulting image,
There are problems such as uneven density and a decrease in contrast ratio. Such a tendency is more prominent when the pigment content is higher than the resin material. This is considered to be due to aggregation of pigment particles contained in the ink as the solid content concentration increases.
In order to solve the above problems, the present inventor has conducted intensive research. As a result, it has been found that the above-described problems can be solved by including a resin material as described in detail below in the color filter ink.

Hereinafter, the resin material (curable resin material) constituting the color filter ink of the present invention will be described in detail.
In the color filter ink of the present invention, the resin material is represented by the monomer component x1 represented by the following formula (1), the monomer component x2 represented by the following formula (2), and the following formula (3). Monomer component x
3 and a monomer component x4 represented by the following formula (4), a monomer component z1 represented by the following formula (5) and a single quantity represented by the following formula (6) The polymer Z containing the body component z2 and the monomer component z3 represented by following formula (7) is included.

[Polymer X]
The polymer X includes a monomer component x1 represented by the above formula (1), a monomer component x2 represented by the above formula (2), and a monomer component x3 represented by the above formula (3). And a monomer component x4 represented by the above formula (4). Examples of the polymer X include those represented by the following formula (11). The polymer X may be substantially composed of a single compound, or may be a mixture of a plurality of types of compounds. However, when the polymer X is a mixture of a plurality of types of compounds, each compound contains monomer components x1, x2, x3 and x4.

(Monomer component x1)
The polymer X contains the monomer component x1 represented by the formula (1) as a monomer component.
By containing such a monomer component x1 as a monomer component, an unintentional reaction (polymerization reaction) of the resin material can be reliably prevented during storage of the color filter ink or in the ink application process described later. On the other hand, in the colored part forming step (curing step) performed in a heating environment, the curing reaction (polymerization reaction) of the resin material can be suitably advanced. That is, by containing the monomer component x1, the resin material has a characteristic that allows the curing reaction to proceed efficiently at a temperature higher than that at a predetermined temperature or less (subsequently below). ,
(Also referred to as “curing reaction switching characteristics”). Further, by containing the monomer component x1 as the monomer component, for example, the dispersion stability of the pigment particles in the color filter ink can be improved, and the long-term storage stability of the color filter ink. The discharge stability can be made excellent. Monomer component x
By containing 1 as a monomer component, the hardness of the colored portion to be formed can be made excellent.

The content of the monomer component x1 in the polymer X (value obtained by conversion based on the weight of the monomer used for polymer synthesis) is preferably 30 to 90 wt%, and 40 to 80 wt%. More preferably. 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 obtained 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, when 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. In addition, the reaction rate of the polymer X at a high temperature decreases,
It becomes difficult to produce a color filter with sufficiently good productivity. In addition, the polymer X is
In the case of a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds can be adopted as the content value of the monomer component x1. Moreover, when the polymer X is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component x1 at the content as described above.

(Monomer component x2)
The polymer X contains the monomer component x2 represented by the above formula (2) as a monomer component.
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. In the colored part formation process (curing process) performed in a heating environment while reliably preventing unintentional reaction (polymerization reaction) of the resin material in the ink application process or the like described later, the resin material curing reaction (polymerization) Reaction) can be suitably carried out. In particular, in the colored portion forming step (curing step) under a heating environment, the rising of the polymerization reaction of the resin material can be improved, and the polymerization reaction can be continuously advanced. Moreover, the hardness etc. of the colored part formed can be made excellent by containing the monomer component x2 as a monomer component. On the other hand, when the monomer component x2 is not contained as the monomer component, the above effects cannot be obtained. More specifically, for example, monomer components x1, x3
Even when the monomer component x2 is not contained, it is difficult to maintain a continuous polymerization reaction even in a heating environment, and the productivity of the color filter is significantly reduced. To do. Further, it becomes difficult to sufficiently advance the curing reaction of the resin material, and the durability of the color filter is lowered. Moreover, since the time required for the curing reaction of the resin material becomes long, there is a possibility that the constituent material of the colored portion to be formed is deteriorated.

The content of the monomer component x2 in the polymer X (value obtained by conversion based on the weight of the monomer used for polymer synthesis) is preferably 5 to 60 wt%, and 10 to 50 wt%. More preferably. 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 (3) as a monomer component.
By containing the monomer component x3 as a monomer component, the chemical resistance, solvent resistance, and the like of the colored portion to be formed can be improved. Thus, after the colored portion forming step (curing step), chemical application and washing (especially N-methyl-2-pyrrolidone, γ-butyrolactone,
Even when post-treatment such as isopropyl alcohol, hydrochloric acid, sodium hydroxide aqueous solution or the like is performed, it is possible to reliably prevent the occurrence of adverse effects due to these.

Further, the monomer component x3 has a sufficiently low reactivity at a relatively low temperature (for example, 100 ° C. or lower) in the polymer X, similarly to the monomer component x1 described above. Under a heating environment such as a heat treatment applied in the forming step (curing step), the substrate exhibits sufficient reactivity. For this reason, the coloring part formation process (in a heating environment) while reliably preventing unintentional reaction (polymerization reaction) of the resin material during storage of the color filter ink or in the ink application process described later (
In the curing step), the curing reaction (polymerization reaction) of the resin material can be suitably advanced.

Further, by containing the monomer component x3 as the monomer component, for example, the dispersion stability of the pigment particles in the color filter ink can be made excellent, and the long-term storage stability of the color filter ink. The discharge stability can be made excellent.
The content of the monomer component x3 in the polymer X (value obtained by conversion based on the weight of the monomer used for the synthesis of the polymer) is preferably 2 to 20 wt%, and 3 to 15 wt%. More preferably. 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 and x2 described above 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 decreased, 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 temperature change 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. In addition, when the polymer X is a mixture of a plurality of types of compounds, these compounds are all monomer components x3 with the above-described contents.
It is preferable to contain.

(Monomer component x4)
The polymer X contains the monomer component x4 represented by the formula (4) as a monomer component.
By containing such a monomer component x4 as a monomer component, when forming the colored portion,
When the dispersion medium is removed from the color filter ink applied on the substrate, the thixotropic property and viscosity of the color filter ink increase with an increase in the solid content concentration, and the surface of the colored portion to be formed does not appear. It is possible to reliably prevent the intentional unevenness from occurring. In particular,
Conventionally, when a pigment is included as a colorant, a problem that unintentional unevenness is generated on the surface of the formed colored portion has occurred remarkably, but according to the present invention, such a problem occurs. Can be reliably prevented.

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

The content of the monomer component x4 in the polymer X (value obtained by conversion based on the weight of the monomer used for polymer synthesis) is preferably 2 to 20 wt%, and 3 to 15 wt%. More preferably. 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. In contrast, monomer component x4 in polymer X
If the content is less than the lower limit, the effect of including 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.

In addition, the polymer X may contain monomer components (other monomer components) other than the monomer components x1, x2, x3, and x4 described above. Thereby, for example, the effect derived from the chemical structure of another monomer can be acquired, exhibiting the above characteristics.
When the polymer X includes other monomer components (monomer components other than the monomer components x1, x2, x3, and 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 to 50000, and 1200 to
It is more preferably 10,000, and even more preferably 1500 to 5000. As a result, it is possible to make the color filter ink stable over time (long-term storage stability), the discharge stability of the color filter ink, and the color filter productivity sufficiently. Furthermore, the flatness of the colored portion formed using the color filter ink can be made more reliable, and the occurrence of color unevenness or the like in the image displayed using the color filter can be more effectively achieved. Can be prevented.
Moreover, it is preferable that the dispersion degree (weight average molecular weight Mw / number average molecular weight Mn) of the polymer X is 1-3.

[Polymer Z]
The polymer Z includes a monomer component z1 represented by the above formula (5), a monomer component z2 represented by the above formula (6), and a monomer component z3 represented by the above formula (7). Is included. Examples of the polymer Z include those represented by the following formula (12).

By including such a polymer Z, it is possible to improve the switching characteristics of the curing reaction as a resin material, the ejection stability of the color filter ink, the hardness of the colored portion to be formed, and the like. The dispersion stability of the pigment in the filter ink can be made particularly excellent. In addition, by including the polymer Z, it is possible to effectively prevent unintended irregularities from occurring on the surface of the colored portion formed using the color filter ink, and display using the color filter. It is possible to more effectively prevent the occurrence of color unevenness and density unevenness and a decrease in contrast ratio in an image to be printed. This is considered to be because the aggregation of the pigment particles can be effectively prevented when the colored medium is formed by removing the dispersion medium from the color filter ink applied on the substrate. In addition, by including the polymer Z, when producing a color filter ink using a production method as described later (in a fine dispersion step described later), the aggregate of pigment particles used as a raw material can be easily made into fine particles. (Disintegration) and productivity of the color filter ink can be improved. In addition, since the polymer Z has extremely excellent stability with respect to mechanical force, modification and deterioration in the fine dispersion step described later are prevented. Therefore, by using the polymer Z,
A color filter ink excellent in pigment dispersibility can be efficiently prepared while reliably preventing the resin material from deteriorating.
The polymer Z may be substantially composed of a single compound, or may be a mixture of a plurality of types of compounds. However, when the polymer Z is a mixture of a plurality of types of compounds,
Each compound contains monomer components z1, z2, and z3.

(Monomer component z1)
The polymer Z contains the monomer component z1 represented by the above formula (5) as a monomer component.
By containing such a monomer component z1 as a monomer component, an unintentional reaction (polymerization reaction) of the resin material can be reliably prevented during storage of the color filter ink or in the ink application process described later. On the other hand, in the colored part forming step (curing step) performed in a heating environment, the curing reaction (polymerization reaction) of the resin material can be suitably advanced. That is, the switching characteristic of the curing reaction for the resin material can be made excellent. Further, by containing the monomer component z1 as the monomer component, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent, and the long-term storage stability of the color filter ink, The discharge stability can be made particularly excellent. The monomer component z1 is
While the polymer Z is excellent in reactivity under a high temperature environment, it has extremely excellent stability against mechanical force. For this reason, even when it is subjected to the fine dispersion step described later together with the pigment, the modification and deterioration of the polymer Z in this step are prevented, and the function of the polymer Z is reliably exhibited in the color filter ink. be able to. Moreover, the hardness etc. of the colored part formed can be made excellent by containing the monomer component z1 as a monomer component.

Moreover, when the polymer Z contains the monomer component z1, the affinity and compatibility of the polymer X and the polymer Z can be made sufficiently excellent. As a result, the discharge stability of the color filter ink can be made excellent, and the colored portion formed using the color filter ink has excellent transparency (light transmission due to the opacity of the resin material). Rate is prevented), adhesion to the substrate is particularly excellent, and problems such as cracks are less likely to occur.

The content of the monomer component z1 in the polymer Z (value obtained by conversion in terms of the weight of the monomer used for the synthesis of the polymer) is preferably 50 to 95 wt%, and 60 to 85 wt%. More preferably. When the content of the monomer component z1 in the polymer Z is a value within the above range, the above-described effects are more prominent without inhibiting the functions of the monomer components z2 and z3 described in detail later. Can be expressed. In contrast, the monomer component z in the polymer Z
When the content ratio of 1 is less than the lower limit, the effect of including the monomer component z1 may not be sufficiently exhibited. On the other hand, when the content rate of the monomer component z1 in the polymer Z exceeds the upper limit, the content rates of the monomer components z2 and z3 are relatively decreased, and these functions may not be sufficiently exhibited. There is. Further, when the content of the monomer component z1 in the polymer Z exceeds the upper limit, the formed colored portion lacks appropriate flexibility and tends to be brittle, and is deformed into a substrate on which the colored portion is provided. In the case where (for example, thermal expansion, thermal contraction, etc.) occurs, the followability of the colored portion is lowered, and it becomes difficult to sufficiently improve the adhesion of the colored portion to the substrate or the like. In addition, when the polymer Z 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 z1. can do. Moreover, when the polymer Z is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component z1 at the content as described above.

(Monomer component z2)
The polymer Z contains the monomer component z2 represented by the above formula (6) as a monomer component.
By containing such a monomer component z2 as a monomer component, wetting and spreading of the color filter ink onto the substrate can be improved, and mixing of bubbles and the like can be reliably prevented, A colored portion having excellent adhesion to the substrate can be suitably formed. In the case where the color filter ink contains a dispersant in addition to the pigment, the monomer component z
By containing 2 as a monomer component, not only the dispersion stability of the pigment but also the dispersion stability of the dispersant can be made particularly excellent. As a result, the pigment dispersion stability and the long-term storage stability of the color filter ink can be made particularly excellent.

The content of the monomer component z2 in the polymer Z (value obtained by conversion in terms of the weight of the monomer used for polymer synthesis) is preferably 3 to 35 wt%, and is 10 to 25 wt%. More preferably. When the content of the monomer component z2 in the polymer Z is a value within the above range, the above-described monomer component z1 and the above-described monomer component z3 described in detail later are not impaired. Such an effect can be expressed more remarkably. On the other hand, when the content of the monomer component z2 in the polymer Z is less than the lower limit value, the effect of including the monomer component z2 may not be sufficiently exhibited. On the other hand, the monomer component z in the polymer Z
When the content rate of 2 exceeds the upper limit, the content rates of the monomer components z1 and z3 are relatively lowered,
These functions may not be fully exhibited. Further, when the content of the monomer component z2 in the polymer Z exceeds the upper limit value, the color filter ink from the nozzles becomes poor when the droplets are ejected by the ink jet method, and the ejection stability is deteriorated. Decreases and problems such as color unevenness easily occur. In addition, when the polymer Z is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) of these compounds is adopted as the content value of the monomer component z2. can do. Moreover, when the polymer Z is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component z2 at the content as described above.

(Monomer component z3)
The polymer Z contains the monomer component z3 represented by the formula (7) as a monomer component.
Such a monomer component z3 is a component that contributes to the curing of the resin material in the colored portion forming step (curing step) described later, similarly to the monomer components x1, x2, z1, and the like described above. While the monomer components x1, x2, and z1 have a function of increasing the hardness of the colored portion to be formed, the monomer component z3 has an appropriate flexibility in the formed colored portion. Even if deformation (for example, thermal expansion, thermal contraction, etc.) occurs in the substrate or the like provided with the colored portion, the function of following the deformation and maintaining the adhesion of the colored portion to the substrate or the like. Have. Thereby, for example, even when the manufactured color filter is repeatedly exposed to a rapid temperature change accompanying image display, good adhesion can be maintained, and problems such as light leakage (white spots, bright spots), etc. Can be prevented more reliably. That is, the durability of the color filter can be made particularly excellent.

The monomer component z3 is colored in the polymer Z, while the reactivity is sufficiently low at a relatively low temperature (for example, 100 ° C. or lower), similarly to the monomer components x1 and z1 described above. In a heating environment such as a heat treatment applied in the part forming step (curing step), it has sufficient reactivity. For this reason, in the coloring part formation process (curing process) performed in a heating environment while reliably preventing unintentional reaction (polymerization reaction) of the resin material during storage of the color filter ink or in the ink application process described later. Can suitably advance the curing reaction (polymerization reaction) of the resin material.
Further, by containing the monomer component z3 as a monomer component, when the dispersion medium is removed from the color filter ink applied on the substrate during the formation of the colored portion, the solid content concentration increases. Thus, the thixotropic property and viscosity of the color filter ink are increased, and it is possible to reliably prevent the occurrence of unintended irregularities on the surface of the colored portion to be formed.

The content of the monomer component z3 in the polymer Z (value obtained by conversion in terms of the weight of the monomer used for the synthesis of the polymer) is preferably 2 to 30 wt%, and 5 to 20 wt%. More preferably. When the content of the monomer component z3 in the polymer Z is a value within the above range, the above-described effects are more remarkably exhibited without inhibiting the functions of the monomer components z1 and z2. Can be made. On the other hand, if the content of the monomer component z3 in the polymer Z is less than the lower limit value, the effect of including the monomer component z3 may not be sufficiently exhibited. On the other hand, if the content of the monomer component z3 in the polymer Z exceeds the upper limit, the content of the monomer components z1 and z2 may be relatively decreased, and these functions may not be sufficiently exhibited. There is. Moreover, when the content rate of the monomer component z3 in the polymer Z exceeds the said upper limit, the hardness of the colored part formed will fall and sufficient durability may not be obtained. In addition, when the polymer Z is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds is adopted as the content value of the monomer component z3. can do. Further, when the polymer Z is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component z3 at the above-described content.

In addition, the polymer Z may contain monomer components (other monomer components) other than the monomer components z1, z2, and z3 described above. Thereby, for example, the effect derived from the chemical structure of another monomer can be acquired, exhibiting the above characteristics.
When the polymer Z contains other monomer components (monomer components other than the monomer components z1, z2, and z3), the content of other monomer components in the polymer Z (multiple types) When the other monomer component is included, the sum of these contents) is preferably 15 wt% or less, more preferably 10 wt% or less.

The weight average molecular weight of the polymer Z is preferably 5,000 to 50,000,
15000 is more preferable. As a result, it is possible to make the color filter ink stable over time (long-term storage stability), the discharge stability of the color filter ink, and the color filter productivity sufficiently. Furthermore, the flatness of the colored portion formed using the color filter ink can be made more reliable, and the occurrence of color unevenness or the like in the image displayed using the color filter can be more effectively achieved. Can be prevented.

Moreover, it is preferable that the dispersion degree (weight average molecular weight Mw / number average molecular weight Mn) of the polymer Z is 1-3.
As described above, in the present invention, the color filter ink is a monomer component x1, x.
Polymer X containing 2, x3 and x4, and polymer Z containing monomer components z1, z2 and z3
It is characterized in that it includes the above, and thereby, the excellent effects as described above can be obtained. On the other hand, when at least one of the polymer X and the polymer Z is missing, or one or more monomer components among the monomer components x1, x2, x3, and x4 constituting the polymer X In the case where one or more of the monomer components z1, z2, and z3 constituting the polymer Z are not used, the above-described effects are obtained. I can't. Similarly, instead of using the polymer X and the polymer Z together, the monomer component constituting the polymer X and the monomer component constituting the polymer Z are included in a single molecule. Even when a polymer is used, the excellent effects as described above cannot be obtained.

Further, when the content of the polymer X in the color filter ink is C _X [wt%] and the content of the polymer Z in the color filter ink is C _Z [wt%], 0.3%
It is preferable that the relationship of ≦ C _X / C _Z ≦ 9.0 is satisfied, and it is more preferable that the relationship of 0.4 ≦ C _X / C _Z ≦ 5.3 is satisfied. By satisfying such a relationship, the stability over time of the color filter ink (long-term storage stability), the reactivity at high temperatures, and the durability and reliability of the produced color filter, In addition to being particularly excellent, it is possible to more effectively prevent the occurrence of color unevenness and the like in a color filter manufactured using a color filter ink.

Moreover, the sum of the content rate of the polymer _X (C _X [wt%]) and the content rate of the polymer Z (C _Z [wt%]) in the color filter ink is 0.5 to 12 wt%. Is preferred,
More preferably, it is 0.7-8.5 wt%.
As described above, in the present invention, the resin material includes the polymer X and the polymer Z, but may further include another resin component (polymer).
Examples of such a resin component (polymer) include polymer Y and polymer W as described below.

[Polymer Y]
The polymer Y includes a monomer component y1 represented by the following formula (13) and a monomer component y2 represented by the following formula (14). Examples of the polymer Y include those represented by the following formula (15).

By including such a polymer Y, the discharge stability of the color filter ink, the dispersion stability of the pigment in the color filter, and the like are improved, and the colored portion formed using the color filter ink The adhesion to the substrate can be made particularly excellent, and the durability and reliability of the produced color filter can be made particularly excellent.
The polymer Y may be substantially composed of a single compound or a mixture of a plurality of types of compounds. However, when the polymer Y is a mixture of a plurality of types of compounds,
Each compound contains monomer components y1 and y2.

(Monomer component y1)
The polymer Y contains the monomer component y1 represented by the formula (13) 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 based on the weight of the monomer used for polymer synthesis) is preferably 30 to 90 wt%, and 40 to 80 wt%. More preferably. When the content of the monomer component y1 in the polymer Y is a value within the above range, the above-described effects are more remarkably exhibited without inhibiting the function of the monomer component y2 described in detail later. Can be made. 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, the content of the monomer component y2 is relatively lowered, and the function of the monomer component y2 is not sufficiently exhibited. there is a possibility. In addition, when the colored portion is formed, when the dispersion medium is removed from the color filter ink applied on the substrate, the viscosity of the color filter ink tends to increase with an increase in the solid content concentration. Involuntary unevenness is likely to occur on the surface of the colored portion.
In addition, when the polymer Y is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds is adopted as the content value of the monomer component y1. can do. Moreover, when the polymer Y is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the monomer component y1 at the content as described above.

(Monomer component y2)
The polymer Y contains the monomer component y2 represented by the formula (14) as a monomer component.
By containing such a monomer component y2 as a monomer component (particularly, together with the above-described monomer component y1), the resin in the storage of the color filter ink or in the ink application step described later, etc. While preventing unintentional reactions (polymerization reactions) of materials more reliably,
In the colored part forming step (curing step) performed in a heating environment, the curing reaction (polymerization reaction) of the resin material can be suitably advanced. In particular, in the colored portion forming step (curing step) under a heating environment, the rising of the polymerization reaction of the resin material can be improved, and the polymerization reaction can be continuously advanced. Moreover, the hardness etc. of the colored part formed can be made excellent by containing the monomer component y2 as a monomer component.

Further, when the polymer Y contains the monomer component y2, the affinity and compatibility of the polymer X, the polymer Z, and the polymer Y can be made sufficiently excellent. As a result, the discharge stability of the color filter ink can be made excellent, and the colored portion formed using the color filter ink has excellent transparency (light transmission due to the opacity of the resin material). Rate is prevented), adhesion to the substrate is particularly excellent, and problems such as cracks are less likely to occur. On the other hand, when the monomer component y2 is not included as a monomer component, the affinity and compatibility of the polymer X, the polymer Z, and the polymer Y cannot be sufficiently improved, and the color The ink for the filter is inferior in ejection stability, and the manufactured color filter is liable to generate uneven color and uneven density, and inferior in contrast, durability, reliability and the like.

The content of the monomer component y2 in the polymer Y (value obtained by conversion in terms of the weight of the monomer used for polymer synthesis) is preferably 10 to 70 wt%, and is 20 to 60 wt%. More preferably. 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.

In addition, the polymer Y may contain monomer components (other monomer components) other than the monomer components y1 and y2 described above. Thereby, for example, the effect derived from the chemical structure of another monomer can be acquired, exhibiting the above 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.
More preferably, it is 0 wt% or less.

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

[Polymer W]
The polymer W includes a monomer component w1 represented by the following formula (16), a monomer component w2 represented by the following formula (17), and a monomer component w3 represented by the following formula (18): And a monomer component w4 represented by the following formula (19). Examples of the polymer W include those represented by the following formula (20).

By including such a polymer W, it is possible to particularly improve the switching characteristics of the curing reaction as a resin material, the discharge stability of the color filter ink, the hardness of the formed colored portion, and the like. The dispersion stability of the pigment in the color filter ink can be made particularly excellent. In addition, by including the polymer W, it is possible to more effectively prevent unintentional irregularities from occurring on the surface of the colored portion formed using the color filter ink. It is possible to more effectively prevent the occurrence of color unevenness and density unevenness and a decrease in contrast ratio in the displayed image. This is considered to be because the aggregation of the pigment particles can be effectively prevented when the colored medium is formed by removing the dispersion medium from the color filter ink applied on the substrate. In addition, by including the polymer W, when an ink for a color filter is manufactured using a manufacturing method as described later (in a fine dispersion step described later), an aggregate of pigment particles used as a raw material can be more easily formed into fine particles And the productivity of the color filter ink can be improved. In addition, since the polymer W has extremely excellent stability with respect to mechanical force, even when the polymer W is subjected to a fine dispersion step described later together with a pigment,
Deterioration is prevented. Therefore, by using the polymer W, it is possible to more efficiently prepare a color filter ink excellent in pigment dispersibility while reliably preventing deterioration of the resin material.
The polymer W may be substantially composed of a single compound, or may be a mixture of a plurality of types of compounds. However, when the polymer W is a mixture of a plurality of compounds,
Each compound contains monomer components w1, w2, w3 and w4.

(Monomer component w1)
The polymer W contains the monomer component w1 represented by the formula (16) as a monomer component.
By containing such monomer component w1 as a monomer component, unintentional reaction (polymerization reaction) of the resin material during storage of the color filter ink or in the ink application process described later can be prevented more reliably. However, in the colored part forming step (curing step) performed in a heating environment, the curing reaction (polymerization reaction) of the resin material can be more suitably progressed. That is, the switching characteristics of the curing reaction for the resin material can be made particularly excellent. Further, by containing the monomer component w1 as a monomer component, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent, and the long-term storage stability of the color filter ink, The discharge stability can be made particularly excellent. In addition, the monomer component w1 is excellent in reactivity in a high-temperature environment in the polymer W, but has extremely excellent stability against mechanical force. For this reason, even if it is a case where it uses for the fine dispersion process mentioned later with a pigment, modification | denaturation and deterioration of the polymer W in this process are prevented, and the function of the polymer W is reliably demonstrated in the ink for color filters. be able to. Further, by including the monomer component w1 as a monomer component, the hardness of the colored portion to be formed can be made particularly excellent.

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

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

(Monomer component w2)
The polymer W contains the monomer component w2 represented by the formula (17) as a monomer component.
By including such a monomer component w2 as a monomer component, wetting and spreading of the color filter ink onto the substrate can be improved, and mixing of bubbles and the like can be reliably prevented. A colored part having excellent adhesion to the substrate can be formed more suitably. In addition, when the color filter ink contains a dispersant in addition to the pigment, by including the monomer component w2 as a monomer component, not only the dispersion stability of the pigment but also the dispersion stability of the dispersant. Can also be made particularly excellent. As a result, the pigment dispersion stability and the long-term storage stability of the color filter ink can be made particularly excellent.

In addition, when the polymer W contains the monomer component w2, the affinity and compatibility between the polymer Z and the polymer W can be sufficiently improved. As a result, the discharge stability of the color filter ink can be made excellent, and the colored portion formed using the color filter ink has excellent transparency (light transmission due to the opacity of the resin material). Rate is prevented), adhesion to the substrate is particularly excellent, and problems such as cracks are less likely to occur.

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

(Monomer component w3)
The polymer W contains the monomer component w3 represented by the formula (18) as a monomer component.
By containing the monomer component w3 as a monomer component, the chemical resistance, solvent resistance, and the like of the colored portion to be formed can be improved. Thus, after the colored portion forming step (curing step), chemical application and washing (especially N-methyl-2-pyrrolidone, γ-butyrolactone,
Even when post-treatment such as isopropyl alcohol, hydrochloric acid, sodium hydroxide aqueous solution or the like is performed, it is possible to prevent the occurrence of adverse effects due to these.

The monomer component w3 is sufficiently low in reactivity at a relatively low temperature (for example, 100 ° C. or lower) in the polymer (polymer W), like the monomer component x1 described above. Whereas
Under a heating environment such as a heat treatment applied in the colored portion forming step (curing step), it has sufficient reactivity. For this reason, in the coloring part formation process (curing process) performed in a heating environment while reliably preventing unintentional reaction (polymerization reaction) of the resin material during storage of the color filter ink or in the ink application process described later. Can suitably advance the curing reaction (polymerization reaction) of the resin material.

Further, by containing the monomer component w3 as the monomer component, for example, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent, and the color filter ink can be stored for a long time. And discharge stability can be improved.
The content of the monomer component w3 in the polymer W (value obtained by conversion based on the weight of the monomer used for polymer synthesis) is preferably 5 to 50 wt%, and 10 to 40 wt%. More preferably. When the content of the monomer component w3 in the polymer W is a value within the above range, without inhibiting the functions of the monomer components w1, w2 and the monomer component w4 described in detail later, The effects as described above can be expressed more remarkably. In addition, when the polymer W is a mixture of a plurality of types of compounds, the weighted average value (weighted average value based on the weight ratio) for these compounds is adopted as the content value of the monomer component w3. can do.
Moreover, when the polymer W is a mixture of a plurality of types of compounds, these compounds are all
It is preferable that the monomer component w3 is contained at the above content.

(Monomer component w4)
The polymer W contains the monomer component w4 represented by the above formula (19) as a monomer component.
By containing such a monomer component w4 as a monomer component, when forming the colored portion,
When the dispersion medium is removed from the color filter ink applied on the substrate, the thixotropic property and viscosity of the color filter ink increase with an increase in the solid content concentration, and the surface of the colored portion to be formed does not appear. It is possible to reliably prevent the intentional unevenness from occurring.

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

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

The polymer W may include monomer components (other monomer components) other than the above-described monomer components w1, w2, w3, and w4. Thereby, for example, the effect derived from the chemical structure of another monomer can be acquired, exhibiting the above characteristics.
When the polymer W contains other monomer components (monomer components other than the monomer components w1, w2, w3, and w4), the content of other monomer components in the polymer W ( When plural kinds 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 W is preferably 5,000 to 50,000,
15000 is more preferable. As a result, it is possible to make the color filter ink stable over time (long-term storage stability), the discharge stability of the color filter ink, and the color filter productivity sufficiently. Furthermore, the flatness of the colored portion formed using the color filter ink can be made more reliable, and the occurrence of color unevenness or the like in the image displayed using the color filter can be more effectively achieved. Can be prevented.

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

The content of the resin material in the color filter ink is 0.5 to 18 wt%.
It is preferable that it is 1 to 15 wt%, more preferably 3 to 10 wt%.
Further, when the content of the resin material in the color filter ink is C _R [wt%] and the content of the pigment in the color filter ink is C _P [wt%], 0.2 ≦ C
_It is preferable to satisfy the relationship of _{R 1} / C _P ≦ 9.0, more preferably satisfy the relationship of 0.3 ≦ C _R / C _P ≦ 5.0, and 0.4 ≦ C _R / C _P ≦ It is more preferable to satisfy the relationship of 3.5. By satisfying such a relationship, the contrast of the produced color filter can be improved, and sufficient contrast is ensured even when the thickness of the colored part is made thinner. can do. In addition, in the conventional color filter ink, when the content of the resin material relative to the content of the pigment is low, inconveniences such as unintentional irregularities on the surface of the formed colored portion are likely to occur, In the present invention, as described above, even when the content of the resin material with respect to the content of the pigment is low, it is possible to reliably prevent unintended irregularities from occurring on the surface of the formed colored portion. be able to. That is, by satisfying the relationship as described above, the effects of the present invention are more remarkably exhibited.
The resin material constituting the color filter ink includes a polymer other than those described above (for example, a thermoplastic polymer or a curable polymer other than the above-described polymers X, Z, Y, and W). It may be.

<Dispersion medium>
The dispersion medium has a function of dispersing the pigment as described above. Further, the dispersion medium having such a function also functions as a solvent for dissolving the above-described resin material in the color filter ink. In general, most of the dispersion medium is removed in the process of manufacturing the color filter.

As the dispersion medium constituting the color filter ink, for example, an ester compound, an ether compound, a hydroxyketone, a carbonic acid diester, a cyclic amide compound, or the like can be used. Among them, [1] a polyhydric alcohol (for example, ethylene glycol, Ethers (polyhydric alcohol ethers) as condensates of propylene glycol, butylene glycol, glycerin, etc.), polyhydric alcohols or alkyl ethers of polyhydric alcohol ethers (eg, methyl ether, ethyl ether, butyl ether, hexyl ether, etc.), Esters (eg, formate, acetate, propionate, etc.), [2] esters of polyvalent carboxylic acids (eg, succinic acid, glutaric acid, etc.) (eg, methyl esters), [3] at least one hydroxyl group in the molecule Small Ether compounds (hydroxy acid) having a Kutomo one carboxyl group, ester, [4] a polyhydric alcohol and a carbonic acid diester having a chemical structure as obtained in the reaction with phosgene is preferred. Examples of the compound that can be used as the dispersion medium include 2- (2-methoxy-1-methylethoxy) -1-methylethyl acetate, triethylene glycol dimethyl ether, triethylene glycol diacetate, diethylene glycol monoethyl ether acetate, 4 -Methyl-1,3-dioxolan-2-one, bis (2-butoxyethyl) ether, dimethyl glutarate, ethylene glycol di-n-butylate, 1,3-butylene glycol diacetate, diethylene glycol monobutyl ether acetate, tetraethylene glycol Dimethyl ether, 1,6-diacetoxyhexane, tripropylene glycol monomethyl ether,
Butoxypropanol, diethylene glycol methyl ethyl ether, diethylene glycol methyl butyl ether, triethylene glycol methyl ethyl ether, triethylene glycol methyl butyl ether, dipropylene glycol monomethyl ether acetate, diethylene glycol dimethyl ether, ethyl 3-ethoxypropionate, diethylene glycol ethyl methyl ether, 3-methoxy Butyl acetate, diethylene glycol diethyl ether, ethyl octoate, ethylene glycol monobutyl ether acetate, ethylene glycol monobutyl ether, cyclohexyl acetate, diethyl succinate, ethylene glycol diacetate, propylene glycol diacetate, 4-hydroxy-4-methyl-2- Ntanone, dimethyl succinate, 1-butoxy-2-propanol, diethylene glycol monoethyl ether, diethylene glycol monomethyl ether, dipropylene glycol monomethyl ether, 3-methoxy-n-butyl acetate, diacetin, dipropylene glycol mono n-propyl ether, polyethylene Glycol monomethyl ether, butyl glycolate, ethylene glycol monohexyl ether, dipropylene glycol mono n-butyl ether, N-methyl-2-pyrrolidone, triethylene glycol butyl methyl ether, bis (2-propoxyethyl) ether, diethylene glycol diacetate, Diethylene glycol butyl methyl ether,
Diethylene glycol butyl ethyl ether, diethylene glycol butyl propyl ether, diethylene glycol ethyl propyl ether, diethylene glycol methyl propyl ether, diethylene glycol propyl ether acetate, triethylene glycol methyl ether acetate, triethylene glycol ethyl ether acetate, triethylene glycol propyl ether acetate, triethylene glycol butyl ether Acetate, triethylene glycol butyl ethyl ether, triethylene glycol ethyl methyl ether, triethylene glycol ethyl propyl ether, triethylene glycol methyl propyl ether, dipropylene glycol methyl ether acetate, n-nonyl alcohol, Ethylene glycol monobutyl ether, triethylene glycol monomethyl ether, ethylene glycol 2-ethylhexyl ether, triethylene glycol monoethyl ether, diethylene glycol monohexyl ether, triethylene glycol monobutyl ether, diethylene glycol mono-2-ethylhexyl ether, tripropylene glycol mono n- Examples thereof include butyl ether and butyl cellosolve acetate, and one or two or more selected from these can be used in combination.

Among them, the dispersion medium is composed of 1,3-butylene glycol diacetate, bis (2-butoxyethyl) ether, 2- (2-methoxy-1-methylethoxy) -1-methylethyl acetate and diethylene glycol monobutyl ether acetate. It is preferable that 1 type or 2 types or more selected from a group are included. Thereby, the dissolved state of the polymer X and the polymer Z in the color filter ink can be made more uniform, and the discharge stability of the color filter ink becomes particularly excellent. In addition, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent.
As a result, it is possible to more effectively suppress color unevenness, density unevenness and the like in each part of the manufactured color filter, and to make the uniformity of characteristics among individuals particularly excellent. Even when a relatively large amount of pigment, resin material, or the like is contained in the color filter ink, the change in the physical properties of the color filter ink is relatively small. Even when the pigment content is increased, the long-term dispersion stability of the pigment can be made sufficiently excellent. Further, when the dispersion medium is composed of the above-described compound, the color filter ink can be more reliably wetted and spread throughout the cell in the color filter manufacturing method as described later. it can.

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

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

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

Among the above [1] to [4], the compound of [1], in particular, a compound having a propylene glycol skeleton and having an alkoxy group at both ends thereof can also be suitably used as a dispersion medium. . By using such a compound, the discharge stability of ink droplets for color filters can be made particularly excellent, and color unevenness, density unevenness, etc. at each part of the produced color filter are more effective. And uniform uniformity of characteristics among individuals. Further, from the chemical structural correlation between the compound and the resin material as described above, the resin material on the surface of the pigment particle in the color filter ink while sufficiently improving the solubility of the resin material as described above. The dispersion stability of the pigment particles in the color filter ink can be made particularly excellent, and the color filter can have a particularly excellent dispersion stability. The long-term storage stability of the ink for use can be made particularly excellent. Further, the productivity of the color filter can be made particularly excellent. Further, the durability of the color filter can be made particularly excellent. In addition, even when the pigment content in the color filter ink is relatively high, the pigment dispersion stability can be sufficiently improved, and the color filter ink stability ( Long-term storage) can be made excellent. By containing a compound having a propylene glycol skeleton and an alkoxy group at both ends as a dispersion medium, it is possible to effectively prevent deterioration of a droplet discharge head used for droplet discharge. Can do. For this reason, even when a large number of color filters are manufactured, the frequency of maintenance such as replacement and repair of the droplet discharge head can be reduced, and the productivity of the color filter can be improved. .
A compound having a chemical structure as described above (a compound having a propylene glycol skeleton and having an alkoxy group at both ends thereof) can be represented by the following general formula (21).

In the formula (21), specific examples of R and R ′ include a methyl group (CH ₃ ), an ethyl group (C
H ₃ CH ₂ ), propyl group (CH ₃ CH ₂ CH ₂ ), isopropyl group (CH ₃ CH (CH
₃ )), butyl group (CH ₃ CH ₂ CH ₂ CH ₂ ), isobutyl group (CH ₃ CH (CH ₃ ))
CH ₂ ), sec-butyl group (CH ₃ CH ₂ CH (CH ₃ )), t-butyl group ((CH ₃
) ₃ C), pentyl group (CH ₃ CH ₂ CH ₂ CH ₂ CH ₂ ), hexyl group (CH ₃ CH ₂₎
CH ₂ CH ₂ CH ₂ ), heptyl group (CH ₃ CH ₂ CH ₂ CH ₂ CH ₂ ), octyl group (
_{CH 3 CH 2 CH 2 CH 2} CH 2) and others as exemplified, preferably an alkyl group having 1 to 4 carbon atoms.

Moreover, as above-mentioned, although 1 + m + n should just be an integer greater than or equal to 1, it is preferable that it is 2-5, and it is more preferable that it is 2-3. As a result, the effects as described above are more remarkably exhibited, and the discharge stability and long-term storage stability (storage stability) of the color filter ink can be made particularly excellent. Durability can be particularly excellent, color unevenness and density unevenness at each part of the color filter can be more effectively suppressed, and uniformity of characteristics among individuals is particularly excellent It can be.

Specific examples of the compound having the above chemical structure and usable as a dispersion medium include, for example, CH ₃ OCH ₂ CH (CH ₃ ) OCH ₃ , CH ₃ O (CH ₂ CH (CH ₃
) O) ₂ CH ₃ , CH ₃ O (CH ₂ CH (CH ₃ ) O) ₃ CH ₃ , CH ₃ O (CH ₂ CH
_{(CH 3) O) 4 CH} 3, CH 3 O (CH 2 CH (CH 3) O) 5 CH 3, CH 3 OCH
₂ CH ₂ CH ₂ OCH ₃ , CH ₃ O (CH ₂ CH ₂ CH ₂ O) ₂ CH ₃ , CH ₃ O (CH
_{2 CH 2 CH 2 O) 3} CH 3, CH 3 O (CH 2 CH 2 CH 2 O) 4 CH 3, CH 3 O (
_{CH 2 CH 2 CH 2 O)} 5 CH 3, CH 3 O [(CH 2 CH (CH 3) O) (CH (CH
_{3) CH 2 O)] CH} 3, CH 3 O [(CH 2 CH (CH 3) O) (CH 2 CH 2 CH 2
O)] CH ₃ , CH ₃ O [(CH ₂ CH (CH ₃ ) O) (CH (CH ₃ ) CH ₂ O) (C
_{H 2 CH 2 CH 2 O)} ] CH 3, CH 3 CH 2 OCH 2 CH (CH 3) OCH 3, CH 3
_{CH 2 O (CH 2 CH (} CH 3) O) 2 CH 3, CH 3 CH 2 O (CH 2 CH (CH 3)
O) ₃ CH ₃ , CH ₃ CH ₂ O (CH ₂ CH (CH ₃ ) O) ₄ CH ₃ , CH ₃ CH ₂ O (
_{CH 2 CH (CH 3) O} ) 5 CH 3, CH 3 CH 2 OCH (CH 3) CH 2 OCH 3, C
_{H 3 CH 2 O (CH (} CH 3) CH 2 O) 2 CH 3, CH 3 CH 2 O (CH (CH 3) C
_{H 2 O) 3 CH 3,} CH 3 CH 2 O (CH (CH 3) CH 2 O) 4 CH 3, CH 3 CH 2
O (CH (CH ₃ ) CH ₂ O) ₅ CH ₃ , CH ₃ CH ₂ OCH ₂ CH ₂ CH ₂ OCH ₃ ,
CH ₃ CH ₂ O (CH ₂ CH ₂ CH ₂ O) ₂ CH ₃ , CH ₃ CH ₂ O (CH ₂ CH ₂ CH
₂ O) ₃ CH ₃ , CH ₃ CH ₂ O (CH ₂ CH ₂ CH ₂ O) ₄ CH ₃ , CH ₃ CH ₂ O (
_{CH 2 CH 2 CH 2 O)} 5 CH 3, CH 3 CH 2 O [(CH 2 CH (CH 3) O) (CH
(CH ₃ ) CH ₂ O)] CH ₃ , CH ₃ CH ₂ O [(CH ₂ CH (CH ₃ ) O) (CH ₂
CH ₂ CH ₂ O)] CH ₃ , CH ₃ CH ₂ O [(CH ₂ CH (CH ₃ ) O) (CH (CH
_{3) CH 2 O) (CH} 2 CH 2 CH 2 O)] CH 3, CH 3 CH 2 OCH 2 CH (CH 3
) OCH ₂ CH ₃ , CH ₃ CH ₂ O (CH ₂ CH (CH ₃ ) O) ₂ CH ₂ CH ₃ , CH _{3
CH 2 O (CH 2 CH (} CH 3) O) 3 CH 2 CH 3, CH 3 CH 2 O (CH 2 CH (C
_{H 3) O) 4 CH 2} CH 3, CH 3 CH 2 O (CH 2 CH (CH 3) O) 5 CH 2 CH 3
CH ₃ CH ₂ OCH ₂ CH ₂ CH ₂ OCH ₂ CH ₃ , CH ₃ CH ₂ O (CH ₂ CH ₂ C
_{H 2 O) 2 CH 2 CH} 3, CH 3 CH 2 O (CH 2 CH 2 CH 2 O) 3 CH 2 CH 3, C
_{H 3 CH 2 O (CH 2} CH 2 CH 2 O) 4 CH 2 CH 3, CH 3 CH 2 O (CH 2 CH 2
_{CH 2 O) 5 CH 2 CH} 3, CH 3 CH 2 O [(CH 2 CH (CH 3) O) (CH (CH
_{3) CH 2 O)] CH} 2 CH 3, CH 3 CH 2 O [(CH 2 CH (CH 3) O) (CH 2
_{CH 2 CH 2 O)] CH} 2 CH 3, CH 3 CH 2 O [(CH 2 CH (CH 3) O) (CH
_{(CH 3) CH 2 O)} (CH 2 CH 2 CH 2 O)] CH 2 CH 3, CH 3 OCH 2 CH (
_{CH 3) OCH 2 CH 2 CH} 2 CH 3, CH 3 O (CH 2 CH (CH 3) O) 2 CH 2 C
_{H 2 CH 2 CH 3, CH} 3 O (CH 2 CH (CH 3) O) 3 CH 2 CH 2 CH 2 CH 3,
_{CH 3 O (CH 2 CH (} CH 3) O) 4 CH 2 CH 2 CH 2 CH 3, CH 3 O (CH 2 C
H (CH ₃ ) O) ₅ CH ₂ CH ₂ CH ₂ CH ₃ , CH ₃ OCH (CH ₃ ) CH ₂ OCH _{2
CH 2 CH 2 CH 3, CH} 3 O (CH (CH 3) CH 2 O) 2 CH 2 CH 2 CH 2 CH 3
, CH ₃ O (CH (CH ₃ ) CH ₂ O) ₃ CH ₂ CH ₂ CH ₂ CH ₃ , CH ₃ O (CH (
_{CH 3) CH 2 O) 4} CH 2 CH 2 CH 2 CH 3, CH 3 O (CH (CH 3) CH 2 O)
₅ CH ₂ CH ₂ CH ₂ CH ₃ , CH ₃ OCH ₂ CH ₂ CH ₂ OCH ₂ CH ₂ CH ₂ CH ₃
, CH ₃ O (CH ₂ CH ₂ CH ₂ O) ₂ CH ₂ CH ₂ CH ₂ CH ₃ , CH ₃ O (CH ₂ C
_{H 2 CH 2 O) 3 CH} 2 CH 2 CH 2 CH 3, CH 3 O (CH 2 CH 2 CH 2 O) 4 CH
₂ CH ₂ CH ₂ CH ₃ , CH ₃ O (CH ₂ CH ₂ CH ₂ O) ₅ CH ₂ CH ₂ CH ₂ CH ₃
, CH ₃ O [(CH ₂ CH (CH ₃ ) O) (CH (CH ₃ ) CH ₂ O)] CH ₂ CH ₂ C
H ₂ CH ₃ , CH ₃ O [(CH ₂ CH (CH ₃ ) O) (CH ₂ CH ₂ CH ₂ O)] CH _{2
CH 2 CH 2 CH 3, CH} 3 O [(CH 2 CH (CH 3) O) (CH (CH 3) CH 2 O
) (CH ₂ CH ₂ CH ₂ O)] CH ₂ CH ₂ CH ₂ CH _{3 and the} like, and one or more selected from these can be used in combination.

The compound as described above includes a compound having a propylene glycol skeleton and having an alkoxy group at both ends, and the propylene glycol skeleton has a structure in which a plurality of 1,2-propylene glycols are condensed. It is preferable to have (that is, l in the formula (21) is an integer of 2 or more). As a result, the effects as described above are more remarkably exhibited, and the discharge stability and long-term storage stability (storage stability) of the color filter ink can be made particularly excellent. Durability can be particularly excellent, color unevenness and density unevenness at each part of the color filter can be more effectively suppressed, and uniformity of characteristics among individuals is particularly excellent It can be. Thus, as a compound (dispersion medium) having a structure in which a propylene glycol skeleton is condensed with a plurality of 1,2-propylene glycols, for example, CH ₃ O (CH ₂ CH (C
_{H 3) O) 2 CH 3} , CH 3 O (CH 2 CH (CH 3) O) 3 CH 3, CH 3 O (CH 2
_{CH (CH 3) O) 4} CH 3, CH 3 O (CH 2 CH (CH 3) O) 5 CH 3, CH 3 O
[(CH ₂ CH (CH ₃ ) O) (CH (CH ₃ ) CH ₂ O)] CH ₃ , CH ₃ O [(CH
_{2 CH (CH 3) O)} (CH (CH 3) CH 2 O) (CH 2 CH 2 CH 2 O)] CH 3,
CH ₃ CH ₂ O (CH ₂ CH (CH ₃ ) O) ₂ CH ₃ , CH ₃ CH ₂ O (CH ₂ CH (C
_{H 3) O) 3 CH 3} , CH 3 CH 2 O (CH 2 CH (CH 3) O) 4 CH 3, CH 3 CH
_{2 O (CH 2 CH (CH} 3) O) 5 CH 3, CH 3 CH 2 O (CH (CH 3) CH 2 O)
₂ CH ₃ , CH ₃ CH ₂ O (CH (CH ₃ ) CH ₂ O) ₃ CH ₃ , CH ₃ CH ₂ O (CH
_{(CH 3) CH 2 O)} 4 CH 3, CH 3 CH 2 O (CH (CH 3) CH 2 O) 5 CH 3,
CH ₃ CH ₂ O [(CH ₂ CH (CH ₃ ) O) (CH (CH ₃ ) CH ₂ O)] CH ₃ , C
H ₃ CH ₂ O [(CH ₂ CH (CH ₃ ) O) (CH (CH ₃ ) CH ₂ O) (CH ₂ CH _{2
CH 2 O)] CH 3,} CH 3 CH 2 O (CH 2 CH (CH 3) O) 2 CH 2 CH 3, CH
₃ CH ₂ O (CH ₂ CH (CH ₃ ) O) ₃ CH ₂ CH ₃ , CH ₃ CH ₂ O (CH ₂ CH (
_{CH 3) O) 4 CH 2} CH 3, CH 3 CH 2 O (CH 2 CH (CH 3) O) 5 CH 2 CH
₃ , CH ₃ CH ₂ O [(CH ₂ CH (CH ₃ ) O) (CH (CH ₃ ) CH ₂ O)] CH ₂
CH ₃ , CH ₃ CH ₂ O [(CH ₂ CH (CH ₃ ) O) (CH (CH ₃ ) CH ₂ O) (C
_{H 2 CH 2 CH 2 O)} ] CH 2 CH 3, CH 3 O (CH 2 CH (CH 3) O) 2 CH 2 C
_{H 2 CH 2 CH 3, CH} 3 O (CH 2 CH (CH 3) O) 3 CH 2 CH 2 CH 2 CH 3,
_{CH 3 O (CH 2 CH (} CH 3) O) 4 CH 2 CH 2 CH 2 CH 3, CH 3 O (CH 2 C
_{H (CH 3) O) 5} CH 2 CH 2 CH 2 CH 3, CH 3 O (CH (CH 3) CH 2 O) 2
_{CH 2 CH 2 CH 2 CH 3} , CH 3 O (CH (CH 3) CH 2 O) 3 CH 2 CH 2 CH 2
CH ₃ , CH ₃ O (CH (CH ₃ ) CH ₂ O) ₄ CH ₂ CH ₂ CH ₂ CH ₃ , CH ₃ O (
CH (CH ₃ ) CH ₂ O) ₅ CH ₂ CH ₂ CH ₂ CH ₃ , CH ₃ O [(CH ₂ CH (CH
_{3) O) (CH (CH} 3) CH 2 O)] CH 2 CH 2 CH 2 CH 3, CH 3 O [(CH 2
_{CH (CH 3) O) (} CH (CH 3) CH 2 O) (CH 2 CH 2 CH 2 O)] CH 2 CH
₂ CH ₂ CH _{3 and the} like.

Further, the propylene glycol skeleton constituting the compound has a structure in which 2 to 3 propylene glycols are condensed (that is, “l + m + n” in formula (21) is 2 to 2).
3) is preferred. As a result, the effects as described above are more remarkably exhibited, and the discharge stability and long-term storage stability (storage stability) of the color filter ink can be made particularly excellent. Durability can be particularly excellent, color unevenness and density unevenness at each part of the color filter can be more effectively suppressed, and uniformity of characteristics among individuals is particularly excellent It can be. in this way,
Examples of the compound (dispersion medium) having a structure in which a propylene glycol skeleton is condensed with 2 to 3 propylene glycols include CH ₃ O (CH ₂ CH (CH ₃ ) O) ₂ CH ₃ , C
_{H 3 O (CH 2 CH (} CH 3) O) 3 CH 3, CH 3 O (CH 2 CH 2 CH 2 O) 2 CH
₃ , CH ₃ O (CH ₂ CH ₂ CH ₂ O) ₃ CH ₃ , CH ₃ O [(CH ₂ CH (CH ₃ ) O
) (CH (CH ₃ ) CH ₂ O)] CH ₃ , CH ₃ O [(CH ₂ CH (CH ₃ ) O) (CH
_{2 CH 2 CH 2 O)]} CH 3, CH 3 O [(CH 2 CH (CH 3) O) (CH (CH 3)
_{CH 2 O) (CH 2 CH} 2 CH 2 O)] CH 3, CH 3 CH 2 O (CH 2 CH (CH 3)
O) ₂ CH ₃ , CH ₃ CH ₂ O (CH ₂ CH (CH ₃ ) O) ₃ CH ₃ , CH ₃ CH ₂ O (
CH (CH ₃ ) CH ₂ O) ₂ CH ₃ , CH ₃ CH ₂ O (CH (CH ₃ ) CH ₂ O) ₃ CH
₃ , CH ₃ CH ₂ O (CH ₂ CH ₂ CH ₂ O) ₂ CH ₃ , CH ₃ CH ₂ O (CH ₂ CH _{2
CH 2 O) 3 CH 3,} CH 3 CH 2 O [(CH 2 CH (CH 3) O) (CH (CH 3) C
_{H 2 O)] CH 3,} CH 3 CH 2 O [(CH 2 CH (CH 3) O) (CH 2 CH 2 CH 2
O)] CH ₃ , CH ₃ CH ₂ O [(CH ₂ CH (CH ₃ ) O) (CH (CH ₃ ) CH ₂ O
) (CH ₂ CH ₂ CH ₂ O)] CH ₃ , CH ₃ CH ₂ O (CH ₂ CH (CH ₃ ) O) ₂ C
_{H 2 CH 3, CH 3 CH} 2 O (CH 2 CH (CH 3) O) 3 CH 2 CH 3, CH 3 CH 2
O (CH ₂ CH ₂ CH ₂ O) ₂ CH ₂ CH ₃ , CH ₃ CH ₂ O (CH ₂ CH ₂ CH ₂ O)
₃ CH ₂ CH ₃ , CH ₃ CH ₂ O [(CH ₂ CH (CH ₃ ) O) (CH (CH ₃ ) CH ₂
O)] CH ₂ CH ₃ , CH ₃ CH ₂ O [(CH ₂ CH (CH ₃ ) O) (CH ₂ CH ₂ CH
_{2 O)] CH 2 CH 3} , CH 3 CH 2 O [(CH 2 CH (CH 3) O) (CH (CH 3)
_{CH 2 O) (CH 2 CH} 2 CH 2 O)] CH 2 CH 3, CH 3 O (CH 2 CH (CH 3)
_{O) 2 CH 2 CH 2 CH} 2 CH 3, CH 3 O (CH 2 CH (CH 3) O) 3 CH 2 CH 2
CH ₂ CH ₃ , CH ₃ O (CH (CH ₃ ) CH ₂ O) ₂ CH ₂ CH ₂ CH ₂ CH ₃ , CH
₃ O (CH (CH ₃ ) CH ₂ O) ₃ CH ₂ CH ₂ CH ₂ CH ₃ , CH ₃ O (CH ₂ CH _{2
CH 2 O) 2 CH 2 CH} 2 CH 2 CH 3, CH 3 O (CH 2 CH 2 CH 2 O) 3 CH 2 C
H ₂ CH ₂ CH ₃ , CH ₃ O [(CH ₂ CH (CH ₃ ) O) (CH (CH ₃ ) CH ₂ O)
_{] CH 2 CH 2 CH 2 CH} 3, CH 3 O [(CH 2 CH (CH 3) O) (CH 2 CH 2 C
H ₂ O)] CH ₂ CH ₂ CH ₂ CH ₃ , CH ₃ O [(CH ₂ CH (CH ₃ ) O) (CH (
_{CH 3) CH 2 O) (} CH 2 CH 2 CH 2 O)] CH 2 CH 2 CH 2 CH 3 and the like.

The boiling point of the dispersion medium under atmospheric pressure (1 atm) is preferably 160 to 300 ° C.,
More preferably, it is 180-290 degreeC, and it is further more preferable that it is 200-280 degreeC. When the boiling point of the dispersion medium under atmospheric pressure is within the above range, clogging or the like in the droplet discharge head that discharges the color filter ink can be more effectively prevented, and the productivity of the color filter can be improved. It can be made particularly excellent.
The vapor pressure of the dispersion medium at 25 ° C. is preferably 0.7 mmHg or less.
. More preferably, it is 1 mmHg or less. When the vapor pressure of the dispersion medium is within the above range and a value,
It is possible to more effectively prevent clogging and the like in the droplet discharge head that discharges the color filter ink, and the productivity of the color filter can be made particularly excellent.

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

<Dispersant>
The color filter ink may contain a dispersant. Thereby, the dispersibility of the pigment particles in the color filter ink can be improved, and the discharge stability of the ink droplets can be made particularly excellent. In particular, when the polymer Z and the dispersant are used in combination, these effects work synergistically, and the dispersion stability of the pigment in the color filter ink and the discharge stability of the color filter ink are particularly excellent. Can be.

Examples of the dispersant include cationic, anionic, nonionic, amphoteric, silicone, and fluorine surfactants.
More specific examples of the dispersant include, for example, Dispersic 101, Dispersic 102, Dispersic 103, Dispersic P104, Dispersic P1.
04S, Dispersic 220S, Dispersic 106, Dispersic 108
, Dispersic 109, Dispersic 110, Dispersic 111, Dispersic 112, Dispersic 116, Dispersic 140, Dispersic 142, Dispersic 160, Dispersic 161, Dispersic 162
, Dispersic 163, Dispersic 164, Dispersic 166, Dispersic 167, Dispersic 168, Dispersic 170, Dispersic 171, Dispersic 174, Dispersic 180, Dispersic 182
Dispersic 183, Dispersic 184, Dispersic 185, Dispersic 2000, Dispersic 2001, Dispersic 2050, Dispersic 2070, Dispersic 2095, Dispersic 2150, Dispersic LPN6919, Dispersic 9075, Dispersic 9077 ,
Manufactured by Big Chemie); EFKA 4008, EFKA 4009, EFKA 4010,
EFKA 4015, EFKA 4020, EFKA 4046, EFKA 4047,
EFKA 4050, EFKA 4055, EFKA 4060, EFKA 4080,
EFKA 4400, EFKA 4401, EFKA 4402, EFKA 4403,
EFKA 4406, EFKA 4408, EFKA 4300, EFKA 4330,
EFKA 4340, EFKA 4015, EFKA 4800, EFKA 5010,
EFKA 5065, EFKA 5066, EFKA 5070, EFKA 7500,
EFKA 7554 (above, manufactured by Ciba Specialty); Solsperse 3000, Solsperse 9000, Solsperse 13000, Solsperse 16000, Solsperse 1
7000, Solsparse 18000, Solsparse 20000, Solsparse 21000
Solsparse 24000, Solsparse 26000, Solsparse 27000, Solsparse 28000, Solsparse 32000, Solsparse 32500, Solsparse 3
2550, Solsparse 33500, Solsparse 35100, Solsparse 35200
Solsperse 36000, Solsperse 36600, Solsperse 38500, Solsperse 41000, Solsperse 41090, Solsperse 20000 (manufactured by Lubrizol Co., Ltd.);
Addisper PB822, Addisper PB824 (above, manufactured by Ajinomoto Fine Techno Co.); Disparon 1850, Disparon 1860, Disparon 2150, Disparon 70
04, Disparon DA-100, Disparon DA-234, Disparon DA-32
5, Disparon DA-375, Disparon DA-705, Disparon DA-725
Disparon PW-36 (above, manufactured by Enomoto Kasei Co., Ltd.); and Florene DOPA-1
4, Floren DOPA-15B, Floren DOPA-17, Floren DOP
A-22, Floren DOPA-44, Floren TG-710, Floren D-
90 (manufactured by Kyoei Chemical Co., Ltd.), Anti-Terra-205 (manufactured by Big Chemie), Hinoact KF-1000, KF-1525, Hinoact 1300M, Hinoact T905
0, Hinoact T6000, Hinoact T7000, Hinoact T8000, Hinoact T8000E (manufactured by Kawaken Fine Chemical Co., Ltd.) and the like, and one or more selected from these can be used in combination.

In particular, the color filter ink is a dispersant having a predetermined acid value (hereinafter referred to as a dispersant).
An acid value dispersant) and a dispersant having a predetermined amine value (hereinafter also referred to as an amine value dispersant). Thereby, the effect by the acid value dispersing agent which exhibits the viscosity reduction effect which reduces the viscosity of the ink for color filters and the effect by the amine number dispersing agent which stabilizes the viscosity of the ink for color filters are compatible. As a result, the pigment dispersion stability in the color filter ink and the discharge stability of the color filter ink droplets can be made particularly excellent.

Specific examples of the acid value dispersant include Dispersic P104 and Dispersic P104.
S, Dispersic 220S, Dispersic 110, Dispersic 111, Dispersic 170, Dispersic 171, Dispersic 174, Dispersic 2095 (above, manufactured by BYK Chemie); EFKA 5010, EFKA 5065
, EFKA 5066, EFKA 5070, EFKA 7500, EFKA 7554
(Above, manufactured by Ciba Specialty Company); Solsperse 3000, Solsperse 16000
And Solsperse 17000, Solsperse 18000, Solsperse 36000, Solsperse 36600, Solsperse 41000 (manufactured by Lubrizol), Hinoact KF-1000 (manufactured by Kawaken Fine Chemical Co., Ltd.) and the like.

Specific examples of the amine value dispersant include Dispersic 102, Dispersic 160, Dispersic 161, Dispersic 162, Dispersic 163,
Dispersic 164, Dispersic 166, Dispersic 167, Dispersic 168, Dispersic 2150, Dispersic LPN6919, Dispersic 9075, Dispersic 9077 (above, manufactured by BYK Chemie); EFKA
4015, EFKA 4020, EFKA 4046, EFKA 4047, EFKA
4050, EFKA 4055, EFKA 4060, EFKA 4080, EFKA
4300, EFKA 4330, EFKA 4340, EFKA 4400, EFKA
4401, EFKA 4402, EFKA 4403, EFKA 4800 (above, manufactured by Ciba Specialty); Azisper PB711 (above, made by Ajinomoto Fine Techno)
; Anti-Terra-205 (manufactured by Big Chemie), KF-1525, Hinoact 1
300M, Hinoact T9050, Hinoact T6000, Hinoact T7000, Hinoact T8000, Hinoact T8000E (manufactured by Kawaken Fine Chemical Co., Ltd.) and the like.

By using such a dispersant (acid value dispersant and amine value dispersant), the dispersion stability of the pigment in the ink is excellent without adversely affecting the color of the formed colored portion. can do.
When the acid value dispersant and the amine value dispersant are used in combination, the acid value of the acid value dispersant (acid value when converted to solid content) is not particularly limited, but is preferably 5 to 370 KOHmg / g. 2
It is more preferably 0 to 270 KOH mg / g, and further preferably 30 to 135 KOH mg / g. When the acid value of the acid value dispersant is within the above range, the dispersion stability of the pigment when used in combination with the amine value dispersant can be made particularly excellent, and it is also used in combination with the amine value dispersant. In this case, the effect of reducing and stabilizing the viscosity of the color filter ink can be obtained more remarkably. The acid value for the dispersant is, for example, DIN EN ISO
2114.

Moreover, it is preferable that the acid value dispersant does not have a predetermined amine value, that is, the amine value is zero.
When the amine value dispersant and the acid value dispersant are used in combination, the amine value of the amine value dispersant (amine value in terms of solid content) is not particularly limited, but is preferably 5 to 200 KOHmg / g. More preferably, it is 25-170 KOHmg / g, 30-130 KOHm
More preferably, it is g / g. When the amine value of the amine value dispersant is within the above range, the dispersion stability of the pigment when used in combination with the acid value dispersant can be made particularly excellent, and it is also used in combination with the acid value dispersant. Reduced viscosity of color filter ink
A stabilizing effect can be obtained more remarkably. In addition, the amine value about a dispersing agent can be calculated | required by the method based on DIN 16945, for example.

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

The acid value of the acid value dispersant is AV [KOHmg / g], and the amine value of the amine value dispersant is BV.
When [KOHmg / g], the content of the acid value dispersant is X _A [wt%], and the content of the amine value dispersant is X _B [wt%], 0.01 ≦ (AV × X _A ) / (BV × X _B ) ≦ 1.
9 is preferably satisfied, and 0.10 ≦ (AV × X _A ) / (BV × X _B ) ≦ 1.5
It is more preferable to satisfy this relationship. By satisfying such a relationship, the synergistic effect due to the combined use of the acid value dispersant and the amine value dispersant is more prominently exhibited, and the droplet discharge stability and the like are particularly excellent. it can.

Moreover, you may use a dispersing agent other than the above as a dispersing agent. For example, as a dispersant,
A compound having a siamelide skeleton can be used. By using such a compound as a dispersant, the dispersibility of the pigment in the dispersion medium in which the resin material as described above is dissolved can be made particularly excellent, and the discharge stability of the color filter ink is particularly improved. It can be excellent. Such an excellent effect is not obtained simply by using a compound having a seamellide skeleton as a dispersant, but by using a resin material as described above in combination with a compound having a seamellide skeleton, These act synergistically and are obtained.

Moreover, as a dispersing agent, the compound which has the partial structure represented by following formula (22) and following formula (23) can be used, for example. By using such a compound as a dispersant, the dispersibility of the pigment in the color filter ink can be made particularly excellent, and the discharge stability of the color filter ink should be made particularly excellent. Can do.

The content of the dispersant in the color filter ink is preferably 0.5 to 15 wt%, and more preferably 0.5 to 8 wt%.

<Other ingredients>
The color filter ink of the present invention may contain components other than those described above. Examples of such components include various crosslinking agents; thermal acid generators such as diazonium salts, iodonium salts, sulfonium salts, phosphonium salts, selenium salts, oxonium salts, ammonium salts, onium salts such as benzothiazolium salts; Photoacid generators such as diazonium salts, iodonium salts, sulfonium salts, phosphonium salts, selenium salts, oxonium salts, ammonium salts; various polymerization initiators; acid crosslinking agents; surfactants; sensitizers; light stabilizers; Light emitting material; leveling agent; adhesion improver; various polymerization accelerators; various light stabilizers; fillers such as glass and alumina; vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-
Methoxyethoxy) silane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, 3
-Aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane,
3-glycidoxypropylmethyldimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3
-Adhesion promoters such as mercaptopropyltrimethoxysilane; antioxidants such as 2,2-thiobis (4-methyl-6-t-butylphenol), 2,6-di-t-butylphenol;
Examples include ultraviolet absorbers such as 2- (3-t-butyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotriazole and alkoxybenzophenone; anti-aggregation agents such as sodium polyacrylate.

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

The surfactant flattens the colored portion by reducing the surface tension of the ink. As such a surfactant, for example, an acrylic surfactant, a vinyl ether surfactant, a silicone surfactant, a fluorine surfactant, and the like can be used.
Among these, it is preferable to use an acrylic surfactant. Acrylic surfactants
While contributing to the flattening of the colored portion, it is excellent in affinity with the polymer X and the polymer Z as described above, and the lightness of the formed colored portion can be increased.

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

The thermal acid generator is a component that generates an acid by heating, and among them, a sulfonium salt and a benzothiazolium salt are particularly preferable. More specific examples of the thermal acid generator include, as trade names, Sun-Aid SI-45, Same as left SI-47, Same as left SI-60, Same as left SI-60
L, left SI-80, same left SI-80L, same left SI-100, same left SI-100L, same left SI-145, same left SI-150, same left SI-160, same left SI-110L, same left SI-
180L (above, Sanshin Chemical Co., Ltd., product name), CI-2921, CI-2920, C
I-2946, CI-3128, CI-2624, CI-2638, CI-2064 (Nippon Soda Co., Ltd., product name), CP-66, CP-77 (Asahi Denka Kogyo Co., Ltd. product, product name) ), FC-520 (manufactured by 3M Company, trade name) and the like.

The photoacid generator is a component that generates an acid by light. More specific examples include trade names such as Syracure UVI-6970, Syracure UVI-6974, and Syracure U.
VI-6990, Cyracure UVI-950 (above, trade name of Union Carbide, USA), Irgacure 261 (trade name, manufactured by Ciba Specialty Chemicals), SP
-150, SP-151, SP-170, Optomer SP-171 (above, trade name, manufactured by Asahi Denka Kogyo Co., Ltd.), CG-24-61 (trade name, manufactured by Ciba Specialty Chemicals), DAICAT II (Daicel) Chemical Industry Co., Ltd., trade name), UVAC1591 (Daicel UCB Co., Ltd. trade name), CI-2064, CI-2639, CI-262
4, CI-2481, CI-2734, CI-2855, CI-2823, CI-275
8 (above, Nippon Soda Co., Ltd., product name), PI-2074 (Rhône Poulen, product name,
Pentafluorophenylborate toluylcumyl iodonium salt), FFC509 (3M
Company product, trade name), BBI-102, BBI-101, BBI-103, MPI-103
, TPS-103, MDS-103, DTS-103, NAT-103, NDS-103
(Trade name) manufactured by Midori Chemical Co., Ltd., CD-1012 (trade name, manufactured by Sartomer, USA) and the like.

The viscosity at 25 ° C. of the color filter ink (viscosity measured using a vibration viscometer) is not particularly limited, but is preferably 4 to 12 mPa · s, and preferably 5 to 11 mPa.
-It is more preferable that it is s. When the viscosity of the color filter ink is within the above range, the droplet discharge by the inkjet method as described later is performed while the variation in the appropriate amount of the color filter ink discharged is particularly small. The occurrence of clogging in the head can be prevented more reliably. The viscosity of the color filter ink can be measured using, for example, a vibration viscometer, and in particular, JIS Z88.
09 can be performed.

≪Method for producing color filter ink≫
Next, a preferred embodiment of the method for producing the color filter ink as described above will be described.
The manufacturing method of this embodiment is a polymer Z for preparing a polymer Z solution in which the polymer Z is dissolved in a solvent.
Solution preparation step, addition of pigment to polymer Z solution, addition of inorganic beads in multiple stages, fine dispersion treatment to obtain pigment dispersion, and polymer constituting pigment dispersion and resin material And a polymer X mixing step of mixing X.

<Polymer Z solution preparation process>
In the polymer Z solution preparation step, a polymer Z solution in which the polymer Z is dissolved in a solvent is prepared. Thus, prior to the step of finely dispersing the pigment described later (fine dispersion step), the liquid to be mixed with the pigment (polymer Z solution) contains the polymer Z, whereby the pigment particles used as a raw material are aggregated. Efficiently and easily and reliably finely pulverize (crush) the aggregate, improve the productivity of the color filter ink, and stabilize the dispersion of the pigment in the final color filter ink. The property can be made particularly excellent. In addition, by using the polymer Z solution, the fine dispersion step described later can be performed under relatively mild conditions, so that unintentional modification and deterioration of the constituent material of the color filter ink can be reliably prevented. be able to.

Moreover, it is preferable to use a dispersing agent in this process. Thereby, the synergistic effect by using the polymer Z and a dispersing agent together is exhibited more notably. When a dispersant is used in this step, the mixture containing the dispersant and the solvent is stirred (prior to the mixing of the polymer Z and the solvent or at the time of mixing the polymer Z and the solvent) (dispersion). It is preferable to predisperse the agent. Thereby, in the obtained polymer Z solution, the association state of the dispersant can be released (unraveled), and the function of the dispersant can be exhibited more effectively. Incidentally, the acid value dispersant and the amine value dispersant described above originally have a property of being easily attracted to each other. However, as in this embodiment, the acid value dispersant and the amine value dispersant Prior to the dispersion of the dispersant, the acid value dispersant and the amine value dispersant are sufficiently dissolved in the association state even when the acid value dispersant and the amine value dispersant are used as the dispersant. Can be uniformly and stably attached to the surface of the pigment particles, and can more reliably prevent aggregation between the dispersants, aggregation between the pigment particles, and the like. The discharge stability can be made particularly excellent.

When the color filter ink is prepared as containing the polymer W, it is preferable to use the polymer W together with the polymer Z in this step.
The content of the dispersing agent in the polymer Z solution prepared in this step (when including a plurality of types of dispersing agents) is not particularly limited, but is preferably 5 to 30 wt%.
More preferably, it is 6-25 wt%. When the content of the dispersant is a value within the above range, the effects as described above are more remarkably exhibited.

Moreover, the content rate of the solvent in the polymer Z solution prepared at this process is although it does not specifically limit, It is preferable that it is 40-80 wt%, and it is more preferable that it is 53-75 wt%. When the content of the solvent is within the above range, the effects as described above are more remarkably exhibited. In addition, as a solvent, what has the same composition as the dispersion medium which comprises the target color filter ink may be used, and the thing of a different composition may be used. In this step, when a solvent having a composition different from the dispersion medium constituting the target color filter ink is used as the solvent, for example, it is diluted with a predetermined liquid (solvent) or reduced pressure in the subsequent step. By replacing the liquid (solvent) with treatment, heat treatment, or the like, the finally obtained color filter ink can be a dispersion medium having a desired composition.

In this step, the polymer Z is obtained by stirring the mixture of the above components using various stirrers.
A solution can be obtained.
Examples of the stirrer that can be used in this step include a uniaxial or biaxial mixer such as a disper mill.
Although the stirring processing time using a stirrer is not specifically limited, It is preferable that it is 1 to 30 minutes, and it is more preferable that it is 3 to 20 minutes. As a result, the productivity of the color filter ink is sufficiently excellent, and the dispersion stability of the pigment particles in the finally obtained color filter ink and the discharge stability of the color filter ink are particularly excellent. It can be.

Moreover, the rotation speed of the stirring blade which the stirrer has in this step is not particularly limited, but 500 to 4
000 rpm is preferable, and 800 to 3000 rpm is more preferable. Thereby, the dispersion stability of the pigment particles in the finally obtained color filter ink can be made particularly excellent while sufficiently improving the productivity of the color filter ink. In addition, deterioration, modification, and the like due to heat or the like of the polymer Z and the dispersant can be more reliably prevented.

<Fine dispersion process>
Next, a pigment is added to the polymer Z solution obtained in the above step, and inorganic beads are added in multiple stages to perform fine dispersion treatment (fine dispersion step).
As described above, since the polymer Z solution used in this step contains the polymer Z, the pigment can be finely divided (pulverized) efficiently, and the productivity of the color filter ink is particularly excellent. Can be. This is because in this step, the polymer Z is surrounded by the polymer Z so as to promote the micronization (pulverization) of the pigment and to prevent re-aggregation of the micronized pigment particles. Conceivable.

In this embodiment, inorganic beads are added in multiple stages in the step of finely dispersing the pigment (fine dispersion step). By adding inorganic beads in multiple stages in the fine dispersion step, the efficiency of atomization of the pigment can be made particularly excellent, and the pigment particles in the finally obtained color filter ink are sufficiently small It can be. In particular, when an acid value dispersant and an amine value dispersant are used in combination, the effect of using such a material and the effect of using a method having a polymer Z solution preparation step and a multi-stage fine dispersion step However, the color filter ink finally obtained is synergistically effective in the dispersion stability of the pigment and the ejection stability of the droplets, and has an excellent contrast. It can be used for manufacturing color filters.

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

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

[First processing]
In this step, first, a pigment is added to the polymer Z solution prepared in the polymer Z solution preparation step described above, and a first treatment is performed in which primary fine dispersion is performed using first inorganic beads having a predetermined particle size. .
The first inorganic beads used in the first treatment are preferably those having a larger particle diameter than the second inorganic beads used in the second treatment. Thereby, the efficiency of the atomization (fine dispersion) of the pigment as the whole fine dispersion process can be made particularly excellent.

The average particle diameter of the first inorganic beads is not particularly limited, but is preferably 0.5 to 3.0 mm, more preferably 0.5 to 2.0 mm, and 0.5 to 1.2 mm. More preferably. When the average particle size of the first inorganic beads is a value within the above range, the efficiency of pigment atomization (fine dispersion) as a whole fine dispersion step can be made particularly excellent. On the other hand, if the average particle size of the first inorganic beads is less than the lower limit value, the efficiency of atomization (reduction in particle size) of the pigment particles in the first treatment is remarkably depending on the type of pigment or the like. A tendency to decline appears. Further, when the average particle size of the first inorganic beads exceeds the upper limit, the efficiency of atomization (reduction in particle size) of the pigment particles in the first treatment can be made relatively excellent. However, the efficiency of atomization (small particle size) of the pigment particles in the second treatment is lowered, and the efficiency of atomization (fine dispersion) of the pigment as the entire fine dispersion process is lowered.

Although the usage-amount of a 1st inorganic bead is not specifically limited, It is preferable that it is 100-600 weight part with respect to polymer Z solution: 100 weight part, and it is more preferable that it is 200-500 weight part.
Although the usage-amount of the pigment added to the polymer Z solution is not specifically limited, The polymer Z solution: 100
The amount is preferably 12 parts by weight or more, more preferably 18 to 35 parts by weight with respect to parts by weight.

The first treatment can be performed by stirring using various stirrers in a state where the pigment and the first inorganic beads are added to the polymer Z solution.
Examples of the stirrer that can be used in the first treatment include a media-type disperser such as a pearl mill, a uniaxial or biaxial mixer such as a disper mill, and the like.
The stirring processing time using the stirrer (processing time of the first processing) is not particularly limited.
It is preferably ~ 120 minutes, more preferably 15 to 40 minutes. Thereby, the atomization (fine dispersion) of the pigment can be efficiently advanced without reducing the productivity of the color filter ink.

Further, the rotational speed of the stirring blade of the stirrer in the first treatment is not particularly limited, but 100
It is preferably 0 to 5000 rpm, and more preferably 1200 to 3800 rpm. Thereby, the atomization (fine dispersion) of the pigment can proceed more efficiently without reducing the productivity of the color filter ink. Further, deterioration, modification, and the like due to heat or the like of the polymer Z and the dispersant can be reliably prevented.

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

It is preferable that the second inorganic beads used in the second treatment have a smaller particle diameter than the first inorganic beads used in the first treatment. Thereby, the pigment in the finally obtained color filter ink can be sufficiently atomized (finely dispersed), and the dispersion stability (long term) of the pigment particles in the color filter ink over a long period of time can be achieved. Dispersion stability)
In particular, the droplet discharge stability can be particularly improved.

The average particle diameter of the second inorganic beads is not particularly limited, but is preferably 0.03 to 0.3 mm, and more preferably 0.05 to 0.2 mm. When the average particle size of the second inorganic beads is a value within the above range, the efficiency of pigment atomization (fine dispersion) as a whole fine dispersion step can be made particularly excellent. On the other hand, if the average particle size of the second inorganic beads is less than the lower limit value, the efficiency of atomization (reduction in particle size) of the pigment particles in the second treatment is remarkably depending on the type of pigment. A tendency to decline appears. In addition, if the average particle size of the second inorganic beads exceeds the upper limit, it may be difficult to sufficiently advance the atomization (fine dispersion) of the pigment particles.

Although the usage-amount of a 2nd inorganic bead is not specifically limited, It is preferable that it is 100-600 weight part with respect to polymer Z solution: 100 weight part, and it is more preferable that it is 200-500 weight part.
The second treatment can be performed using various stirrers.
Examples of the stirrer that can be used in the second treatment include a media-type disperser such as a pearl mill, a uniaxial or biaxial mixer such as a disper mill, and the like.

The stirring processing time using the stirrer (processing time of the second processing) is not particularly limited.
It is preferably ~ 120 minutes, more preferably 15 to 40 minutes. Thereby, the atomization (fine dispersion) of the pigment can be sufficiently advanced without reducing the productivity of the color filter ink.
Further, the rotational speed of the stirring blade of the stirrer in the second treatment is not particularly limited, but 100
It is preferably 0 to 5000 rpm, and more preferably 1200 to 3800 rpm. Thereby, the atomization (fine dispersion) of the pigment can proceed more efficiently without reducing the productivity of the color filter ink. In addition, it is possible to reliably prevent deterioration, modification, and the like of the dispersant due to heat.

In the above description, the case where fine dispersion processing is performed in two stages has been mainly described, but three or more stages of processing may be performed. In such a case, it is preferable that the inorganic beads used in the subsequent treatment have a smaller particle size than the inorganic beads used in the previous treatment. In other words, the average particle diameter of the inorganic beads (n-th inorganic beads) used in the n-th stage treatment is that of the inorganic beads ((n-1) inorganic beads) used in the (n-1) -stage treatment. The average particle size is preferably smaller.
By satisfying such a relationship, the efficiency of atomization (fine dispersion) of the pigment particles can be made particularly excellent, and the particle size of the pigment particles in the finally obtained color filter ink can be reduced. It can be smaller.
In the fine dispersion step (for example, the first process and the second process), for example, a process such as dilution with a solvent may be performed as necessary.

<Polymer X mixing step>
The pigment dispersion obtained in the fine dispersion step as described above is mixed with the polymer X (polymer X mixing step). Thereby, the ink for color filters is obtained.
Thus, in this embodiment, the process (timing) using the polymer X and the process (timing) using the polymer Z are different. While reliably preventing unintentional modification / deterioration of the resin material, the pigment dispersion stability, the ejection stability of the color filter ink, and the like can be made particularly excellent.

This step is preferably performed in a state where the second inorganic beads used in the second treatment are removed.
The removal of the second inorganic beads can be easily and reliably performed by a method such as filtration.
This step can be performed using various stirrers.
Examples of the stirrer that can be used in this step include a uniaxial or biaxial mixer such as a disper mill.

The stirring time using the stirrer (processing time in this step) is not particularly limited, but is 1 to 60.
Minutes are preferred, and 15 to 40 minutes are more preferred.
Moreover, the rotation speed of the stirring blade of the stirrer in this step is not particularly limited, but is 1000 to 1000.
5000 rpm is preferable, and 1200 to 3800 rpm is more preferable.

In this step, a liquid having a composition different from that of the solvent used in the step may be added. Thereby, the dissolution of the polymer Z in the polymer Z solution preparation step, the dispersion of the dispersant, and
It is possible to reliably obtain a color filter ink having desired characteristics while preferably finely dispersing the pigment particles in the fine dispersion step.
In this step, prior to mixing the pigment dispersion and the polymer X or after mixing the pigment dispersion and the polymer X, at least a part of the solvent used in the step is removed. Also good. Thereby, the composition of the solvent in the polymer Z solution preparation step and the fine dispersion step and the composition of the dispersion medium in the finally obtained color filter ink can be made different. As a result, for the color filter having desired characteristics while suitably dissolving the polymer Z in the polymer Z solution preparation step, dispersing the dispersant, and finely dispersing the pigment particles in the fine dispersion step. Ink can be obtained reliably. The removal of the solvent can be performed, for example, by placing the target liquid in a reduced pressure atmosphere or heating.

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

More specifically, the color filter ink set of the present invention has a red colorant (particularly,
A red ink containing a red pigment), a green ink containing a green colorant (particularly a green pigment), and a blue ink containing a blue colorant (particularly a blue pigment). Is preferred. As a result, the color reproduction range of the color filter manufactured using the color filter ink set can be particularly wide. Further, in the color filter, the luminance balance between the respective colors can be easily adjusted, and an image with particularly excellent image quality can be suitably displayed.

"Color filter"
Next, an example of a color filter manufactured using the color filter ink (ink set) as described above will be described.
FIG. 1 is a cross-sectional view showing a preferred embodiment of the color filter of the present invention.
As shown in FIG. 1, the color filter 1 includes a substrate 11 and a colored portion 12 formed using the color filter ink described above. As the coloring portion 12, a first coloring portion 12A, a second coloring portion 12B, and a third coloring portion 12C having different colors are provided. A partition wall 13 is provided between the adjacent colored portions 12.

<Board>
The substrate 11 is a plate-like member having light transmittance, and has a function of holding the colored portion 12 and the partition wall 13.
The substrate 11 is preferably made of a substantially transparent material. This
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 of a desired amount of ink and has a desired shape. , Characteristic variation between each pixel is small, unintentional color mixing (
Mixing of multiple types 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.

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 is a red filter region (R), the second colored portion 12B is a green filter region (G), and the third colored portion 12C is a blue filter region (B).
).

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

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

The height of the partition wall 13 is not particularly limited, but is preferably larger than the 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 to 10 μm, and preferably 0.5 to 3.5.
More preferably, it is μm. As a result, color mixing between the adjacent colored portions 12 can be reliably 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 curable resin material. In this way, in a method as described later,
The partition wall 13 can be easily formed to have a desired shape. Further, the partition wall 13
May have a function as a light-shielding part, it may contain a light-absorbing material such as carbon black as a constituent material.

《Color filter manufacturing method》
Next, an example of a method for manufacturing the color filter 1 as described above will be described.
2 is a cross-sectional view showing a method for manufacturing a color filter, FIG. 3 is a perspective view showing a droplet discharge device used for manufacturing the color filter, and FIG. 4 is a droplet discharge means in the droplet discharge device shown in FIG. FIG. 5 is a diagram showing the bottom surface of the droplet ejection head in the droplet ejection device shown in FIG. 3, and FIG. 6 is a diagram showing the droplet ejection head in the droplet ejection device shown in FIG. It is a figure, (a) is a section perspective view, (b) is a sectional view.

As shown in FIG. 2, in this embodiment, a substrate preparation step (1a) for preparing a substrate 11, a partition formation step (1b, 1c) for forming a partition 13 on the substrate 11, and a color filter by an ink jet method. Ink application step (1) for applying ink 2 to the area surrounded by the partition wall 13
d) and a colored portion forming step (1e) in which the dispersion medium is removed from the color filter ink 2 and the resin material is cured to form a solid colored portion 12.

<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. For example, the pre-baking process is performed at a heating temperature:
It can be performed under the conditions of 50 to 150 ° C. and heating time: 30 to 600 seconds.

Thereafter, radiation is applied through a photomask, post-exposure baking (PEB) is performed, and further, development using an alkali developer is performed, so that the partition 1
3 is formed (1c). PEB is, for example, heating temperature: 50 to 150 ° C., heating time: 3
It can be performed under the conditions of 0 to 600 seconds and radiation irradiation intensity of 1 to 500 mJ / cm ² . Further, the development processing can be performed by, for example, a liquid piling method, a dipping method, a vibration dipping method, or the like, and the development processing time can be, for example, 10 to 300 seconds. Further, after the development process, a post-bake process may be performed as necessary. Post bake processing is, for example,
Heating temperature: 150-280 ° C., heating time: 3-120 minutes.

<Ink application process>
Next, the color filter ink 2 is applied to the cell 14 surrounded by the partition wall 13 by an inkjet method (1d).
This step is performed using a plurality of types of color filter inks 2 corresponding to the plurality of colored portions 12 to be formed. At this time, since the partition wall 13 is provided, it is reliably prevented that two or more kinds of color filter inks 2 are mixed.

Further, as described above, the color filter ink 2 includes the resin material (polymer X, polymer Z), and is excellent in droplet ejection stability. For this reason, even when the color filter 1 to be manufactured is large or when a large number of color filters 1 are manufactured continuously, it is possible to reliably prevent problems such as flight bending. The droplet discharge amount can be easily and reliably controlled. As a result, it is possible to reliably prevent problems such as color mixing, color unevenness / density unevenness, and reduction in contrast ratio in the manufactured color filter 1.

The color filter ink 2 is discharged using a droplet discharge device as shown in FIGS.
As shown in FIG. 3, the droplet discharge device 100 used in this step includes a tank 101 that holds the color filter ink 2, a tube 110, and a tank 101 via the tube 110.
And a discharge scanning unit 102 to which the color filter ink 2 is supplied. The ejection scanning unit 102 includes a droplet ejection unit 103 having a plurality of droplet ejection heads (inkjet heads) 114 mounted on a carriage 105, and a first position control device 104 (movement) that controls the position of the droplet ejection unit 103. Means), a stage 106 for holding the substrate 11 on which the partition wall 13 is formed in the above process (hereinafter also simply referred to as "substrate 11"), and a second position control device 108 (moving means) for controlling the position of the stage 106. ) And a control means 112. The tank 101 and a plurality of droplet discharge heads 114 in the droplet discharge means 103 are connected by a tube 110, and the color filter ink 2 is compressed by compressed air from the tank 101 to each of the plurality of droplet discharge heads 114. Supplied.

The first position control device 104 responds to a signal from the control means 112 in accordance with the droplet discharge means 103.
Are moved along the X-axis direction and the Z-axis direction orthogonal to the X-axis direction. 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. In addition, the second
The position control device 108 also has a function of rotating the stage 106 around an axis parallel to the Z axis.

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

As shown in FIG. 4, the droplet discharge means 103 has a plurality of droplet discharge heads 114 each having substantially the same structure, and a carriage 105 that holds these droplet discharge heads 114. In the present embodiment, the number of droplet discharge heads 114 held by the droplet discharge means 103 is eight. Each droplet discharge head 114 has a bottom surface provided with a plurality of nozzles 118 described later. The shape of the bottom surface of each droplet discharge head 114 is a polygon having two long sides and two short sides. The bottom surface of the droplet discharge head 114 held by the droplet discharge means 103 faces the stage 106 side, and the long side direction and the short side direction of the droplet discharge head 114 are respectively an X-axis direction and a Y-axis direction. Parallel to the direction.

As shown in FIG. 5, the droplet discharge head 114 has a plurality of nozzles 118 arranged in the X-axis direction. The plurality of nozzles 118 are arranged such that the nozzle pitch HXP in the X-axis direction in the droplet discharge head 114 has a predetermined value. Although the specific value of nozzle pitch HXP is not specifically limited, For example, it can be set as 50-90 micrometers. Here, the “nozzle pitch HXP in the X-axis direction in the droplet discharge head 114” is a plurality of images obtained by projecting all the nozzles 118 in the droplet discharge head 114 onto the X-axis along the Y-axis direction. This corresponds to the pitch between nozzle images.

In the present embodiment, the plurality of nozzles 118 in the droplet discharge head 114 form a nozzle row 116A and a nozzle row 116B that both extend in the X-axis direction. The nozzle row 116A and the nozzle row 116B are arranged in parallel with a space therebetween. In this embodiment, 90 nozzles 118 in each of the nozzle row 116A and the nozzle row 116B.
Are arranged in a line in the X-axis direction at a constant interval LNP. Although the specific value of LNP is not specifically limited, It can be set as 100-180 micrometers.

The position of the nozzle row 116B is shifted from the position of the nozzle row 116A by a half length of the nozzle pitch LNP in the positive direction in the X-axis direction (right direction in FIG. 5). Therefore, the nozzle pitch HXP in the X-axis direction of the droplet discharge head 114 is the nozzle row 116A (or nozzle row 1).
16B) is half the nozzle pitch LNP.
Therefore, the nozzle line density in the X-axis direction of the droplet discharge head 114 is the nozzle row 116A (
Or it is twice the nozzle line density of the nozzle row 116B). In the present specification, “nozzle linear density in the X-axis direction” means the number per unit length of a plurality of nozzle images obtained by projecting a plurality of nozzles on the X-axis along the Y-axis direction. It corresponds to. Of course, the number of nozzle rows included in the droplet discharge head 114 is not limited to two. The droplet discharge head 114 may include M nozzle rows. Here, M is a natural number of 1 or more. In this case, in each of the M nozzle rows, the plurality of nozzles 118 are arranged at a pitch that is M times the nozzle pitch HXP. Further, when M is a natural number of 2 or more, the other (M−1) nozzle rows are only i times as long as the nozzle pitch HXP with respect to one of the M nozzle rows. There is no overlap in the X-axis direction. Here, i is a natural number from 1 to (M−1).

In the present embodiment, each of the nozzle row 116 </ b> A and the nozzle row 116 </ b> B includes 90 nozzles 118, and thus one droplet discharge head 114 has 180 nozzles 118. However, 5 nozzles at both ends of the nozzle row 116A are set as “pause nozzles”. Similarly, 5 nozzles at both ends of the nozzle row 116B are also set as “pause nozzles”. The color filter ink 2 is not ejected from these 20 “rest nozzles”. Therefore, 180 nozzles 1 in the droplet discharge head 114
Among these nozzles, 160 nozzles 118 function as nozzles that discharge the color filter ink 2.

As shown in FIG. 4, the droplet discharge means 103 has a plurality of the droplet discharge heads 11.
4 are arranged in two rows along the X-axis direction. The droplet ejection heads 114 in one row and the droplet ejection heads 114 in the other row are arranged so as to partially overlap when viewed from the Y-axis direction in consideration of the rest nozzles. Thereby, in the droplet discharge means 103, the nozzle 118 that discharges the color filter ink 2 is continuous in the X-axis direction at the nozzle pitch HXP over the length of the dimension of the substrate 11 in the X-axis direction. It is configured.

In the droplet discharge means 103 of this embodiment, the droplet discharge head 114 is disposed so as to cover the entire length of the substrate 11 in the X-axis direction.
A part of the length of the substrate 11 corresponding to the dimension in the X-axis direction may be covered.
As shown in the figure, each droplet discharge head 114 is an inkjet head.
More specifically, each droplet discharge head 114 includes a vibration plate 126 and a nozzle plate 128. Between the diaphragm 126 and the nozzle plate 128, the tank 10
A liquid pool 129 in which the color filter ink 2 supplied from 1 through the hole 131 is always filled is located.

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

On the diaphragm 126, the vibrator 124 is positioned corresponding to each cavity 120. The vibrator 124 includes a piezo element 124C and a pair of electrodes 12 sandwiching the piezo element 124C.
4A, 124B. By applying a driving voltage between the pair of electrodes 124A and 124B, the color filter ink 2 is ejected from the corresponding nozzle 118. The nozzle 11 is so discharged that the color filter ink 2 is discharged from the nozzle 118 in the Z-axis direction.
The shape of 8 is adjusted.

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

The control means 112 (see FIG. 3) may be configured to give a signal to each of the plurality of vibrators 124 independently of each other. That is, the volume of the color filter ink 2 ejected from the nozzle 118 may be controlled for each nozzle 118 in accordance with a signal from the control unit 112. The control unit 112 can also set the nozzle 118 that performs the ejection operation during the application scan and the nozzle 118 that does not perform the ejection operation.

Herein, one nozzle 118 and a cavity 120 corresponding to the nozzle 118;
A portion including the vibrator 124 corresponding to the cavity 120 may be referred to as “ejection unit 127”. According to this notation, one droplet discharge head 114 has the same number of discharge units 127 as the number of nozzles 118.
Using the droplet discharge device 100 as described above, the color filter ink 2 corresponding to the colored portions 12 of the plurality of colors of the color filter 1 is applied to the cells 14. By using the apparatus as described above, the color filter ink 2 can be efficiently and selectively applied to the cells 14. Further, as described above, the color filter ink 2 is
It has excellent ejection stability, and even when droplets are ejected for a long period of time, problems such as flying bends and unstable droplet ejection are extremely unlikely to occur. is there. 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 illustrated configuration, the droplet discharge device 100 has only one tank 101 for holding the color filter ink 2, a tube 110, etc., but the color filter 1 has a plurality of these members. It may have a plurality of colors corresponding to the colored portion 12. In manufacturing the color filter 1, a plurality of droplet discharge devices 100 corresponding to a plurality of color filter inks 2 may be used.
In the present invention, the droplet discharge head 114 may use an electrostatic actuator as a driving element instead of a piezoelectric element. In addition, the droplet discharge head 114 may be configured to use an electrothermal conversion element as a drive element and discharge the color filter ink by utilizing the thermal expansion of the material by the electrothermal conversion element.

<Colored part forming step (curing step)>
Next, the dispersion medium is removed from the color filter ink 2 in the cell 14, and the resin material is cured to form a solid colored portion 12 (1e). As a result, 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. Moreover, it can prevent reliably that a dispersion medium remains in the coloring part 12 formed. As a result, the durability and reliability of the color filter 1 can be made particularly excellent. Also, the productivity of the color filter 1 is improved.

Although the heating temperature in this step (the temperature of the heated substrate 11) is not particularly limited,
It is preferable that it is 280 degreeC, and it is more preferable that it is 110-250 degreeC. This
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 dispersion medium can be suitably removed from the color filter ink 2.
Moreover, the heating time in this step is not particularly limited, but is preferably 30 to 190 minutes, and more preferably 40 to 130 minutes.

In this step, a plurality of heat treatments with different temperatures may be performed. Specifically, in this step, a first heat treatment that heats the substrate 11 at a relatively low temperature and a second heat treatment that heats the substrate 11 at a temperature higher than the first heat treatment are performed. May be.
As a result, unintentional deterioration / decomposition of the constituent material of the colored portion 12 is prevented, the productivity of the color filter 1 is improved, and further, it is effective that the dispersion medium remains in the formed colored portion 12. Can be prevented.

Further, in this step, by performing a first heat treatment for heating the substrate 11 at a relatively low temperature and a second heat treatment for heating the substrate 11 at a temperature higher than the first heat treatment, The flatness of the surface of the coloring part 12 can be made higher.
In such a case, by heating the substrate 11 at a relatively low temperature in the first heat treatment, the dispersion medium is gently removed while preventing the convection of the color filter ink 2, and the color filter ink 2 The fluidity can be lost or reduced with the surface flat. Moreover, the unintentional curing reaction of the resin material can be prevented by heating at a relatively low temperature.

In the second heat treatment, the dispersion medium that could not be removed by the first heat treatment can be completely removed. In this step, the color filter ink 2 is reacted with the resin material.
In the case of curing the color filter ink 2 fixed in a flat state in the first heat treatment, the color filter ink 2 can be efficiently cured in its shape.

As described above, when the first heat treatment and the second heat treatment are performed in this step, the first heat treatment is performed.
Although the processing temperature (temperature of the heated substrate 11) in the heat treatment is not particularly limited,
It is preferable that it is 100 degreeC, and it is more preferable that it is 40-80 degreeC. Thereby, the dispersion medium can be suitably removed from the color filter ink 2 while reliably preventing convection of the color filter ink 2.

Moreover, the time of the first heat treatment is not particularly limited, but is preferably 3 to 50 minutes, and more preferably 5 to 40 minutes.
Moreover, the processing temperature (temperature of the heated substrate 11) in the second heat treatment is not particularly limited, but is preferably 120 to 280 ° C, and more preferably 150 to 250 ° C. Thereby, the dispersion medium which could not be removed by the first heat treatment can be completely removed. Further, in this step, when the color filter ink 2 is cured by reacting a resin material (curable resin material), the color filter ink 2 fixed in a flat state in the first heat treatment is used. It can be efficiently cured in that shape.
The time for the second heat treatment is not particularly limited, but is preferably 25 to 150 minutes, and more preferably 30 to 100 minutes.
Moreover, in this process, you may perform the process of irradiating an active energy ray or placing the board | substrate 11 to which the ink 2 for color filters was provided in a pressure-reduced environment, for example.

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

Further, the dispersion medium is reliably removed even when the heating temperature is relatively low by placing the substrate 11 to which the color filter ink 2 is applied in a reduced pressure environment (depressurizing treatment). Thus, the occurrence of adverse effects on the substrate 11, the formed colored portion 12 and the like can be prevented 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. 7 is a cross-sectional view showing a preferred embodiment of the liquid crystal display device. As shown in the figure, the liquid crystal display device 60 includes a color filter 1, a substrate (opposite substrate) 66 disposed on the surface side where the colored portion 12 of the color filter 1 is provided, a color filter 1 and a substrate 66. And a polarizing plate 67 provided on the side of the color filter 1 opposite to the surface facing the liquid crystal layer 62 (lower side in FIG. 7). And the liquid crystal layer 6 of the substrate 66
2 and a polarizing plate 68 provided on the surface opposite to the surface facing 2 (upper side in FIG. 7).
A common electrode 61 is provided on the surface of the color filter 1 on which the colored portion 12 and the partition wall 13 are provided (the surface opposite to the surface of the colored portion 12 and the partition wall 13 facing the substrate 11). On the surface of the (opposite substrate) 66 facing the liquid crystal layer 62 and the color filter 1, pixel electrodes 65 are arranged in a matrix at positions corresponding to the colored portions 12 of the color filter 1. Further, an alignment film 64 is provided between the common electrode 61 and the liquid crystal layer 62, and a substrate 66 is provided.
An alignment film 63 is provided between the (pixel electrode 65) and the liquid crystal layer 62.

The substrate 66 is a substrate having optical transparency with respect to visible light, and is, for example, a glass substrate.
The common electrode 61 and the pixel electrode 65 are made of a material having optical transparency to visible light, and are made of, for example, ITO.
Although not shown in the drawing, a plurality of switching elements (for example, TFT: thin film transistor) are provided so as to correspond to each pixel electrode 65. For each pixel electrode 65 corresponding to each coloring portion 12, by controlling the voltage application state between the common electrode 61, in the region corresponding to each coloring portion 12 (each pixel electrode 65), Light transmittance can be controlled.

In the liquid crystal display device 60, light emitted from a backlight (not shown) is transmitted to the polarizing plate 68 side (
Incident light enters from the upper side in FIG. 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 each coloring part 12 (1
2A, 12B, and 12C) is emitted from the polarizing plate 67 (lower side in FIG. 7) as light of a color corresponding to the color.
As described above, since the colored portion 12 is formed using the color filter ink 2 (color filter ink set) of the present invention, variation in characteristics between colors and between pixels is suppressed. It is a thing. 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.

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

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

FIG. 9 is a perspective view showing a configuration of a mobile phone (including PHS) to which the electronic apparatus of the present invention is applied.
In this figure, a cellular phone 1200 includes a plurality of operation buttons 1202 and an earpiece 1204.
In addition to the mouthpiece 1206, an image display device 1000 is provided in the display unit.

FIG. 10 is a perspective view showing the configuration of a digital still camera to which the electronic apparatus of the present invention is applied. In this figure, connection with an external device is also simply shown.
Here, a normal camera sensitizes a silver halide photographic film with a light image of a subject, whereas
The digital still camera 1300 uses a CCD (Charge Coupled Device) to capture a light image of a subject.
An image pickup signal (image signal) is generated through photoelectric conversion by an image pickup device such as the above.

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

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

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

The electronic device of the present invention includes, for example, a television (for example, a liquid crystal television), a video camera, a viewfinder type, a monitor in addition to the above-described personal computer (mobile personal computer), mobile phone, and digital still camera. Direct-view video tape recorder, laptop personal computer, car navigation system, pager, electronic notebook (including communication function), electronic dictionary, calculator, electronic game device, word processor, workstation, video phone, security TV monitor , Electronic binoculars, POS terminals, devices equipped with touch panels (for example, cash dispensers of financial institutions, automatic ticket machines),
Medical equipment (for example, electronic thermometer, blood pressure monitor, blood glucose meter, electrocardiogram display device, ultrasonic diagnostic device, display device for endoscope), fish detector, various measuring devices, instruments (for example, vehicles, aircraft, ships Instrumentation), flight simulators, other various monitors, and projection display devices such as projectors. 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 the color filter ink corresponding to the colored portion of each color is applied to the cell, the dispersion medium is removed from the color filter ink of each color in the cell in a lump, and the resin material In the above description, the colored portion forming step (curing step) is performed only once. However, the ink application step and the colored portion forming step may be repeatedly performed corresponding to each color. .

In addition, each unit constituting the color filter, the image display device, and the electronic device can be replaced with an arbitrary one that exhibits the same function, or another configuration can be added. For example, in the color filter of the present invention, a protective film that covers the colored portion may be provided on the surface of the colored portion opposite to the surface facing the substrate. Thereby, damage, deterioration, etc. of a coloring part can be prevented more effectively.

Further, the color filter ink of the present invention may be produced by any method, and may not be produced by the method described above. For example, in the above-described embodiment, the fine dispersion of the pigment is described as being performed in the polymer Z solution. However, the fine dispersion of the pigment may not be performed in this way.
In the above-described embodiment, the case where the color filter ink set includes the three types (three colors) of color filter inks corresponding to the three primary colors of light has been mainly described, but the color filter ink set is configured. The number and type (color) of the color filter ink to be performed are not limited to those described above. For example, in the present invention, the color filter ink set may include four or more color filter inks.

Next, specific examples of the present invention will be described.
[1] Synthesis of polymer (Synthesis Example 1)
Diethylene glycol monobutyl ether acetate as a solvent (solvent): 31 in a reaction vessel (flask) equipped with a stirrer, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer: 31
4 parts by weight were added and heated to 90 ° C. Subsequently, 2,2′-azobis (isobutyronitrile) (AIBN) as a radical initiator: 20 parts by weight and diethylene glycol monobutyl ether acetate (solvent): 30 parts by weight were added to the flask. The monomer component (compound) represented by the formula (1) x1: 180 parts by weight, the monomer component (compound) represented by the formula (2) x2: 90 parts by weight, the formula (3) Monomer component (compound) represented by
x3: 15 parts by weight, monomer component (compound) represented by the above formula (4) x4: 15 parts by weight, 2
2,2'-azobis (isobutyronitrile) (AIBN): A solution prepared by dissolving 50 parts by weight in diethylene glycol monobutyl ether acetate: 200 parts by weight was added dropwise over 5 hours using a dropping pump, and further aged for 4 hours. It was. Then, it cools to room temperature and the polymer X1 as the polymer X represented by the said Formula (11) including the monomer component x1, x2, x3, x4
Got.

(Synthesis Examples 2 to 10)
Change and adjust the type and amount of each component (including solvent (solvent)) used in polymer synthesis,
The same operations as in Synthesis Example 1 were performed except that the composition of the polymer and the weight average molecular weight were changed as shown in Table 1. As a result, nine types of polymers (polymers X2 to X10) were obtained.
(Synthesis Examples 11-14)
Change and adjust the type and amount of each component (including solvent (solvent)) used in polymer synthesis,
The same operations as in Synthesis Example 1 were performed except that the composition of the polymer and the weight average molecular weight were changed as shown in Table 1. As a result, four types of polymers (polymers X′1 to X′4) were obtained.

(Synthesis Example 15)
Into a reaction vessel (flask) equipped with a stirrer, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer, 55 parts by weight of methoxybutyl acetate as a solvent (solvent) and 191 parts by weight of methoxybutanol were placed, and 80 Heated to ° C. Subsequently, in the flask, the above formula (5)
Monomer component (compound) z1: 276 parts by weight, monomer component (compound) z2 represented by formula (6): 51 parts by weight, azobisdimethylvaleronitrile as a radical initiator: A solution in which 39 parts by weight was dissolved in 360 parts by weight of methoxybutyl acetate was dropped using a dropping pump over 5 hours, and further aged for 3 hours.
Thereafter, 26 parts by weight of glycidyl methacrylate and 2 parts by weight of methoquinone were added to the flask and reacted at 110 ° C. for 10 hours. Thereafter, it is cooled to room temperature, and the monomer component z1,
A polymer Z1 as a polymer Z including z2 and z3 and represented by the above formula (12) was obtained.

(Synthesis Examples 16-22)
Change and adjust the type and amount of each component (including solvent (solvent)) used in polymer synthesis,
The same operations as in Synthesis Example 15 were performed except that the composition of the polymer and the weight average molecular weight were changed as shown in Table 1. As a result, seven types of polymers (polymers Z2 to Z8) were obtained.
(Synthesis Examples 23 to 25)
Change and adjust the type and amount of each component (including solvent (solvent)) used in polymer synthesis,
The same operations as in Synthesis Example 15 were performed except that the composition of the polymer and the weight average molecular weight were changed as shown in Table 1. As a result, three types of polymers (polymers Z′1 to Z′3) were obtained.

(Synthesis Example 26)
Diethylene glycol monobutyl ether acetate as a solvent (solvent): 31 in a reaction vessel (flask) equipped with a stirrer, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer: 31
4 parts by weight were 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 formula (13), monomer component (compound) y2 represented by formula (14): 100 parts by weight, 2,2′- Azobis (isobutyronitrile) (AIBN): 50 parts by weight of diethylene glycol monobutyl ether acetate:
The solution dissolved in 200 parts by weight was dropped over 5 hours using a dropping pump, and further aged for 4 hours. Then, it cooled to room temperature and obtained the polymer Y1 as the polymer Y containing the monomer components y1 and y2 and represented by the said Formula (15).
(Synthesis Examples 27 and 28)
Change and adjust the type and amount of each component (including solvent (solvent)) used in polymer synthesis,
The same operation as in Synthesis Example 26 was performed except that the composition of the polymer and the weight average molecular weight were changed as shown in Table 1. As a result, two types of polymers (polymers Y2 and Y3) were obtained.

(Synthesis Example 29)
Diethylene glycol monobutyl ether acetate as a solvent (solvent): 18 in a reaction vessel (flask) equipped with a stirrer, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer: 18
0 part by weight was added and heated to 85 ° C. Subsequently, in the flask, the monomer component (compound) represented by the above formula (16) w1: 188 parts by weight, the monomer component represented by the above formula (17) (
Compound) w2: 34 parts by weight, monomer component (compound) w3: 74 represented by the above formula (18)
Parts by weight, monomer component (compound) w4 represented by the above formula (19): 74 parts by weight, azobisdimethylvaleronitrile as a radical initiator: 64 parts by weight dissolved in diethylene glycol monobutyl ether acetate: 386 parts by weight The solution was added dropwise using a dropping pump over 5 hours, and further aged for 3 hours. Then, it cools to room temperature and monomer component w1,
A polymer W1 as a polymer W represented by the above formula (20) including w2, w3, and w4 was obtained.

(Synthesis Examples 30, 31)
Change and adjust the type and amount of each component (including solvent (solvent)) used in polymer synthesis,
The same operation as in Synthesis Example 29 was performed except that the composition of the polymer and the weight average molecular weight were changed as shown in Table 1. As a result, two types of polymers (polymers W2 and W3) were obtained.
In Table 1, the ratio of each monomer component which comprises each polymer synthesize | combined in the synthesis examples 1-31 and the weight average molecular weight Mw of each polymer were shown collectively. The polymer synthesized as described above is
In all cases, the dispersity (weight average molecular weight Mw / number average molecular weight Mn) was in the range of 1-3.

[2] Preparation of color filter ink (color filter ink set) (Example 1)
Dispersic 111 as an acid value dispersant, Dispersic 166 as an amine value dispersant, polymer Z1, and diethylene glycol as a solvent for dissolving the polymer Z1 (component of dispersion medium in color filter ink) Monobutyl ether acetate is put into a stirrer (single screw mixer) with an internal capacity of 400 cc, and 10 with a disper mill.
The polymer Z solution was obtained by stirring for minutes (polymer Z solution preparation process). At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm.

Next, as described below, the polymer Z solution obtained in the polymer Z solution preparation step was subjected to a fine dispersion step in which a pigment was added and inorganic beads were added in multiple stages to perform a fine dispersion treatment. .
First, a pigment was added to the obtained polymer Z solution and stirred for 10 minutes. At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm. Examples of the pigment include C.I. I. A mixture of Pigment Red 177 and the pigment derivative represented by the above formula (8);
C. I. A mixture of Pigment Red 254 and the pigment derivative represented by the above formula (9) and a sulfonated pigment derivative powder having a chemical structure represented by the above formula (10) were used. Moreover, at this time, it diluted with the diethylene glycol monobutyl ether acetate so that the content rate of the pigment in the mixture of the polymer Z solution and a pigment might be 16 wt%.

Next, inorganic beads having an average particle diameter of 0.8 mm (first inorganic beads, made of zirconia, “Tor
ay ceram crushed ball "(trade name, manufactured by Toray Industries, Inc.)
The mixture was stirred for 0 minutes and the first stage dispersion treatment (first treatment) was performed. At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm.
Next, the filter ("PALL HDCII Membrane Filter", P
The inorganic beads (first inorganic beads) are removed by filtration using an ALL), and then
Inorganic beads having an average particle diameter of 0.1 mm (second inorganic beads, manufactured by Zirconia, “Toray c
"Eram ground ball" (trade name, manufactured by Toray Industries, Inc.) was added, and the mixture was further stirred for 30 minutes to perform the second stage dispersion treatment (second treatment). At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm. At this time, the pigment dispersion was diluted with diethylene glycol monobutyl ether acetate so that the pigment content in the resulting pigment dispersion was 13 wt%.

Then, filter ("PALL HDCII Membrane Filter" (
Inorganic beads (second inorganic beads) were removed by filtration using a trade name), manufactured by PALL, and a pigment dispersion was obtained.
Next, polymer X1 and polymer Y1 are added to the pigment dispersion obtained as described above,
Mixed (polymer X mixing step). In this step, the above materials are mixed with a stirrer having an internal capacity of 400 cc (
(Single screw mixer) and stirred for 10 minutes with a disper mill. At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm. This
The intended red color filter ink (R ink) was obtained. The content ratio of the pigment of the obtained R ink was 7.3 wt%.

In addition, the color filter ink (G ink) and the blue color filter ink (B ink) are the same as the red color filter ink except that the type of pigment and the amount of each component used are changed. Was prepared. As a result, an ink set composed of three colors of R, G, and B was obtained. The average particle diameter of the pigment constituting the R ink, the average particle diameter of the pigment constituting the G ink, and the average particle diameter of the pigment constituting the B ink are 70 nm and 70 nm, respectively.
It was 70 nm. Examples of the G ink pigment include C.I. I. Pigment green 58,
The sulfonated pigment derivative powder having the chemical structure represented by the above formula (10) was used, and the pigment content in the final G ink was 10.1 wt%. Moreover, as a pigment of B ink,
C. I. Pigment Blue 15: 6 was used, and the pigment content in the final B ink was 4.9.
wt%.

(Examples 2 to 11)
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 were changed as shown in Tables 2 and 3.
(Comparative Examples 1-9)
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 Tables 3 and 4.

(Comparative Example 10)
Example 1 except that instead of polymer X and polymer Y, a commercially available trisphenolmethane type epoxy resin (Nippon Kayaku Co., Ltd., EPPN-502H) was used and polymer Z was not used.
In the same manner, an ink for a color filter (ink set) was prepared.
In each of the above Examples and Comparative Examples, when the polymers Z, W, and Z ′ are used, they are used in the polymer Z solution preparation step (or a step performed at a timing corresponding thereto). The polymers X, Y and X ′ were used in the polymer X mixing step (or a step performed at a timing corresponding to this).

Tables 2 to 4 collectively show the types and contents of the constituent components of the color filter inks in the above Examples and Comparative Examples. In the table, C.I. I. Pigment Red 177 "P
R177 ", C.I. I. Pigment Red 254 is "PR254", C.I. I. Pigment Red 177 and a pigment derivative represented by the formula (8) “PR177D”, C.I. I. “PR254D”, a mixture of pigment red 254 and a pigment derivative represented by formula (9),
10) powders composed of pigment derivatives represented by “SPD”, C.I. I. Pigment Green 58 is changed to “PG58”, C.I. I. Pigment Green 36 is “PG36”, C.I. I. Pigment Blue 15: 6 is changed to “PB15: 6”, C.I. I. Pigment Yellow 150 "PY
150 ", C.I. I. Pigment Violet 23 is “PV23”, Dispersic 11
1 (acid value: 50 KOH mg / g) is “DA1”, Dispersic 2095 (acid value: 13
KOHmg / g) “DA2”, Dispersic P104 (acid value: 360 KOHmg /
g) “DA3”, Dispersic 166 (amine value: 115 KOH mg / g) “D
A4 ”, Dispersic 9075 (amine number: 12 KOH mg / g)“ DA5 ”, Solsperse 41000“ DA6 ”, Dispersic LPN6919“ DA7 ”, Hinoact T8000E“ DA8 ”, Diethylene glycol monobutyl ether acetate“ S1 ”, 1,3-butylene glycol diacetate is “S2”, 2- (2-methoxy-1-methylethoxy) -1-methylethyl acetate is “S3”, bis (2-butoxyethyl) ether is “S4”, 3 -Ethyl ethoxypropionate was represented by “S5”, methoxybutyl acetate by “S6”, methoxybutanol by “S7”, and trisphenolmethane type epoxy resin (Nippon Kayaku Co., Ltd., EPPN-502H) by “R1”. The acid value of the dispersant is determined by a method according to DIN EN ISO 2114, and the amine value is
It was determined by a method based on DIN 16945. In the column of “Viscosity” in the table, the viscosity at 25 ° C. of the color filter ink measured according to JIS Z8809 using a vibration viscometer was shown.

In addition, C. used in each Example and each comparative example. I. Pigment Red 177 and Formula (8)
The content of the pigment derivative represented by the formula (8) in the mixture with the pigment derivative represented by
All were 0.1 to 10 wt%. In addition, C.I. used in the above Examples and Comparative Examples.
I. In the mixture of Pigment Red 254 and the pigment derivative represented by Formula (9) (
The content of the pigment derivative represented by 9) was 0.1 to 10 wt% in all cases.

[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 FIGS. 3 to 6 installed in a chamber (thermal chamber) and an ink set for a color filter of each of the examples and comparative examples, With the drive waveform of the piezo element optimized, 500,000 (500000 drops) of droplets were continuously discharged from each nozzle of the droplet discharge head for each ink. For the 500,000 droplets discharged from the designated nozzle near the center of the droplet discharge head, the average value of the deviation amount d from the center target position of the center position of each landed droplet is obtained, and the following four steps According to the criteria of
evaluated. As the average value of the shift amount d, the average value of the values obtained for the three color inks was employed. It can be said that the smaller the value is, the more effectively the occurrence of flight bending is prevented.
A: The average value of the shift amount d is less than 0.06 μm.
B: The average value of the shift amount d is 0.06 μm or more and less than 0.12 μm.
C: The average value of the shift amount d is 0.12 μm or more and less than 0.16 μm.
D: The average value of the shift amounts d is 0.16 μm or more.

[3.2] Stability evaluation of droplet discharge amount Droplet discharge device as shown in FIG. 3 to FIG. 6 installed in a chamber (thermal chamber), and ink sets for color filters of each of the above examples and comparative examples Were prepared, and 500,000 droplets (500000 droplets) were continuously discharged from each nozzle of the droplet discharge head for each ink in a state where the drive waveform of the piezoelectric element was optimized. For the two specified nozzles on the left and right ends of the droplet discharge head, the total weight of the discharged droplets is obtained, and the absolute value ΔW [ng] of the difference between the average discharge amounts of the droplets discharged from the two nozzles is calculated. Asked. The ratio (ΔW / W _T ) of this ΔW to the target discharge amount W _T [ng] of the droplet was determined and evaluated according to the following four 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. As the value of [Delta] W / W _T, it was used the average of the values obtained for the three colors of ink.
A: The value of ΔW / _{W T} is less than 0.065.
B: The value of ΔW / _{W T} is less than 0.065 than 0.450.
C: The value of ΔW / _{W T} is less than 0.450 than 0.780.
D: The value of ΔW / _{W T} is 0.780 or more.

[3.3] Evaluation of intermittent printing performance Prepared are a droplet discharge device as shown in FIG. 3 to FIG. 6 installed in a chamber (thermal chamber) and an ink set for a color filter of each of the above examples and comparative examples, With the drive waveform of the piezo element optimized, 10000 droplets (10000 droplets) are continuously discharged from each nozzle of the droplet discharge head for each ink, and then the droplets are discharged for 180 seconds. Interrupted (first sequence). Thereafter, similarly, the operation of continuously discharging the droplets and interrupting the discharge of the droplets were repeated. For the specified nozzle near the center of the droplet discharge head, the average weight W ₁ [ng] of the droplets discharged in the first sequence and the average weight W ₄₀ [ng] of the droplets discharged in the 40th sequence And asked. Then, the ratio (| W ₁ −W ₄₀ | / W _T ) of the absolute value of the difference between W ₁ and W ₄₀ to the target discharge amount W _T [ng] of the droplet is obtained, and the following three criteria are used. ,evaluated. | _W 1 _-W 40 | 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). Note that | W ₁ −W ₄₀ | / W
The average value of the values obtained for the three color inks was adopted as the value of.
_A: | _{W 1} -W 40 | value of / _{W T} is less than 0.050.
_B: | _{W 1} -W 40 | values of / _{W T} is less than 0.050 0.680.
_C: | _{W 1} -W 40 | value of / _{W T} is 0.680 or more.

[3.4] Continuous Discharge Test Using a droplet discharge device as shown in FIGS. 3 to 6 installed in a chamber (thermal chamber), the color filter ink set of each of the examples and comparative examples, 25 ℃ 3
Each droplet constituting the color filter ink set was ejected by continuously operating the droplet ejection device for 96 hours under an environment of 0% RH.

The nozzle clogging rate ([(number of clogged nozzles) / (total number of nozzles)] × 100) obtained after continuous operation is found and the nozzles are clogged. As for No. 1, it was examined whether or not clogging can be eliminated by a cleaning member made of a plastic material. The results were evaluated according to the following four criteria. 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 0.5% (excluding zero), and clogging can be eliminated by cleaning.
C: The occurrence rate of nozzle clogging is 0.5% or more and less than 1.0%, and clogging can be eliminated by cleaning.
D: The occurrence rate of nozzle clogging is 1.0% or more, or clogging cannot be eliminated by cleaning.
In addition, said evaluation was performed on the same conditions about each Example and each 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 in an environment of 60 ° C. for 28 days and then visually observed, and evaluated according to the following five criteria.
A: No change from before heating is observed.
B: Almost no aggregation or sedimentation of pigment particles is observed.
C: Slight aggregation / precipitation of pigment particles is observed.
D: Aggregation / sedimentation of pigment particles is clearly observed.
E: Aggregation / sedimentation of pigment particles is noticeable.

[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 alkali developer, and further by performing post-baking to separate the partition walls. Formed. PEB was performed under the conditions of heating temperature: 110 ° C., heating time: 120 seconds, and radiation irradiation intensity: 150 mJ / cm ² . The development process was performed by, for example, a vibration dipping method. The development processing time was 60 seconds. The post-bake treatment was performed under the conditions of heating temperature: 150 ° C. and heating time: 5 minutes. The formed partition wall had a thickness of 1.6 μm.

Next, using a droplet discharge device as shown in FIGS. 3 to 6, color filter ink was discharged into a cell as a region surrounded by a partition wall. At this time, three color filter inks were used so that the color filter inks of the respective colors were not mixed. In each cell, a color filter ink was applied in such an amount that the average thickness of the colored portions to be formed was 1.6 μm.

Thereafter, heat treatment was performed on a hot plate at 80 ° C. for 20 minutes (first heat treatment).
Furthermore, by performing a 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, 7000 color filters were produced using the color filter inks (ink sets) of each Example and each Comparative Example.

[6] Evaluation of color filter The following evaluation was performed using each color filter obtained as described above.
[6.1] Flatness of colored portion Of the color filters manufactured using the color filter inks (ink sets) of the respective Examples and Comparative Examples, the color filters manufactured on the 31st sheet are respectively Prepared.

About these color filters, 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 three steps | paragraphs of criteria. .
A: ΔD is less than 0.15 μm.
B: ΔD is 0.15 μm or more and less than 0.40 μm.
C: ΔD is 0.40 μm or more.

[6.2] Evaluation of contrast ratio Of the color filters manufactured using the color filter inks (ink sets) of the respective Examples and Comparative Examples, the color filters manufactured for the 7000th sheet were used. A liquid crystal display device as shown in FIG. 7 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 red single color display, evaluation was performed according to the following four-stage criteria.
A: CR is 2900 or more.
B: CR is 2200 or more and less than 2900.
C: CR is 1900 or more and less than 2200.
D: CR is less than 1900.

In the case of green single color display, evaluation was performed according to the following four-stage criteria.
A: CR is 3800 or more.
B: CR is 3300 or more and less than 3800.
C: CR is 3000 or more and less than 3300.
D: CR is less than 3000.

In the case of blue single color display, evaluation was performed according to the following four-stage criteria.
A: CR is 3100 or more.
B: CR is 2700 or more and less than 3100.
C: CR is 2400 or more and less than 2700.
D: CR is less than 2400.

[6.3] Color unevenness and density unevenness About the liquid crystal display devices of the respective Examples and Comparative Examples manufactured in [6.2], in a dark room,
Visual observation is performed in the state of single color display of red, single color display of green, single color display of blue, and single color display of white, and the occurrence of color unevenness and density unevenness at each part is determined according to the following five levels. And evaluated.

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

[6.4] Difference in characteristics between individuals Among the color filters manufactured using the color filter inks (ink sets) of the respective Examples and Comparative Examples, the 1st to 20th sheets and 6980 respectively. ~ 699
A color filter manufactured for the ninth sheet is prepared, and in the 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. A spectrophotometer (MCPD30, manufactured by Otsuka Electronics Co., Ltd.)
00). From the results, for each example and each comparative example,
The maximum color difference (color difference ΔE in the Lab display system) of the color filters manufactured in the 1st to 20th and 6980th to 6999th sheets (total 40 color filters) is obtained. evaluated.

A: Color difference (ΔE) is less than 1.7.
B: Color difference (ΔE) is 1.7 or more and less than 2.7.
C: Color difference (ΔE) is 2.7 or more and less than 3.7.
D: Color difference (ΔE) is 3.7 or more and less than 4.7.
E: Color difference (ΔE) is 4.7 or more.

[6.5] 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 on the 21st to 30th sheets were respectively used. Then, a liquid crystal display device as shown in FIG. 7 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 70 ° 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 ambient temperature was returned again to 20 ° C., which was set to one cycle (8 hours), and this cycle was repeated 30 times in total (total 240 hours).

Thereafter, using these color filters, a liquid crystal display device as shown in FIG. 7 was assembled again.
Using these liquid crystal display devices, visual observation is performed in a dark room with red single color display, green single color display, and blue single color display, and the occurrence of light leakage (white spots, bright spots) is observed. The evaluation was made according to the following five-stage 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 5 color filters.
D: Light leakage (white spots, bright spots) is observed in 6 to 9 color filters.
E: Light leakage (white spots, bright spots) is observed in 10 color filters.

[7] Evaluation of heat resistance Each color filter ink is used on a glass substrate having a thickness of 0.7 mm.
It was applied by spin coating. The amount of ink applied was set so that the dry film thickness was 1.6 μm.
Next, these test pieces were heated at 230 ° C. for 1 hour in a clean oven.

Next, about the test piece which heat-processed at 230 degreeC, a spectrophotometer (the Otsuka Electronics company make, M
The color was measured using CPD3000).
Thereafter, these test pieces were further heated at 250 ° C. for 1 hour in a clean oven.
Here, about the test piece which heat-processed at 250 degreeC, a spectrophotometer (made by Otsuka Electronics Co., Ltd.,
The color was measured using MCPD3000).

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 three criteria.
○: Color difference (ΔE) is less than 1.
Δ: Color difference (ΔE) is 1 or more and less than 3.
X: Color difference (ΔE) is 3 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 1.6 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 solvent resistance About each color test piece of each of the examples and comparative examples, a spectrophotometer (Made by Otsuka Electronics Co., Ltd., M
The color was measured using CPD3000).
Next, these test pieces were immersed in a solvent at 50 ° C. for 10 minutes, and thereafter, colorimetry was similarly performed using a spectrophotometer (manufactured by Otsuka Electronics Co., Ltd., MCPD3000).

From these results, the color difference before and after immersion of the solvent (color difference ΔE in the Lab display system) was determined for each test piece and evaluated according to the following two-stage criteria.
○: Color difference (ΔE) is less than 3.
X: Color difference (ΔE) is 3 or more.
Solvents include γ-butyrolactone (γ-BL), isopropyl alcohol (IPA)
N-methyl-2-pyrrolidone (NMP), 0.5N hydrochloric acid (HCl), and 0.5N aqueous sodium hydroxide (NaOH) were used.

[8.2] Light resistance evaluation About the test piece of each color of each of the above Examples and Comparative Examples, a spectrophotometer (manufactured by Otsuka Electronics Co., Ltd., M
The color was measured using CPD3000).
Next, in an environment of 40 ° C. and 60% RH, these test pieces were irradiated with light using a xenon fade meter, and thereafter, similarly, a spectrophotometer (MCPD30 manufactured by Otsuka Electronics Co., Ltd.) was used.
00). Irradiation conditions were 320 W / m ² × 200 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 three-stage criteria.
○: Color difference (ΔE) is less than 1.
Δ: Color difference (ΔE) is 1 or more and less than 3.
X: Color difference (ΔE) is 3 or more.

[8.3] Evaluation of Adhesiveness to Substrate First, eleven vertical and horizontal cuts perpendicular to each other were made at 1 mm intervals on the colored films of the test pieces of the respective colors of the respective Examples and Comparative Examples. Furthermore, lightly adhere the cellophane tape to the pattern with your finger, quickly remove the tape, observe the state of the wound, and according to the following five-stage criteria:
evaluated.

A: There is slight peeling at the intersection line of the cuts, and the area of the defect is less than 4% of the total square area.
B: There is peeling at the intersection of the cuts, and the area of the missing part is 4% or more and less than 14% of the total square area.
C: The width of peeling due to the cut is wide, and the area of the defect is 14% or more of the total square area 34
%Less than.
D: The width of the peeling due to the cut is wider than 4 points, and the area of the defect is 34% of the total square area
More than 64%.
E: The area of peeling is 64% or more of the total square area.

[8.4] Evaluation of Adhesiveness 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 and washed with isopropyl alcohol vapor.
Thereafter, an ITO (indium tin oxide) film was formed to a thickness of 120 nm under a vacuum of 6 × 10 ⁻³ Torr at a substrate set temperature of 200 ° C.

After the heat resistance test at 180 ° 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. In addition, as AFM, Nippon Biko Co., Ltd. Na
noScope IIIa was used.
A: No abnormality such as wrinkles or cracks was observed in the ITO film.
Δ: Several abnormalities such as wrinkles and cracks were observed in the ITO film.
X: Abnormalities such as wrinkles and cracks were observed on the entire surface of the ITO film.
These results are shown in Tables 5-10.

As apparent from Tables 5 to 10, in the present invention, the droplet discharge stability (ejection stability) and storage stability (long-term storage stability) are excellent, and the manufactured color filter is a mixture of colors and colors. Unevenness,
The occurrence of density unevenness was suppressed, and the contrast ratio and durability were excellent. Further, in the present invention, the variation in characteristics among individual color filters is small. In the present invention, the formed colored portion has sufficient hardness. In the present invention, the colored film (colored portion) formed using the color filter ink is excellent in solvent resistance, heat resistance, light resistance, adhesion to the substrate, and adhesion of the ITO film. confirmed.
On the other hand, in each comparative example, a satisfactory result was not obtained.
Further, when a commercially available liquid crystal television was disassembled and the liquid crystal display device part was replaced with one manufactured as described above, and the same evaluation as described above was performed, the same result as above was obtained.

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

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Color filter 11 ... Board | substrate 12 ... Colored part 12A ... 1st colored part 12B ...
2nd coloring part 12C ... 3rd coloring part 13 ... Partition 14 ... Cell 2 ... Color filter ink 3 ... Coating film 60 ... Liquid crystal display device 61 ... Common electrode 62 ... Liquid crystal layer 63, 64
... Alignment film 65 ... Pixel electrode 66 ... Substrate (opposite substrate) 67, 68 ... Polarizing plate 100 ... Droplet discharge device 101 ... Tank 102 ... Discharge scanning unit 103 ... Droplet discharge means 104 ... First position control device 105 ... Carriage 106 ... Stage 108 ... Second position control device
DESCRIPTION OF SYMBOLS 110 ... Tube 112 ... Control means 114 ... Droplet discharge head (inkjet head) 116A, 116B ... Nozzle row 118 ... Nozzle 120 ... Cavity 122 ... Bulkhead 124 ... Vibrator 124A, 124B ... Electrode 124C ... Piezo element 126 ... Diaphragm 127 ... Discharge part 128 ... Nozzle plate 129 ... Puddle 130 ... Supply port 1
DESCRIPTION OF SYMBOLS 31 ... Hole 1000 ... Image display apparatus 1100 ... Personal computer 1102 ... Keyboard 1104 ... Main-body part 1106 ... Display unit 1200 ... Mobile telephone 120
DESCRIPTION OF SYMBOLS 2 ... Operation button 1204 ... Earpiece 1206 ... Transmission mouth 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 (15)

A color filter ink used in the production of an ink jet color filter,
A pigment, a resin material, and a dispersion medium in which the pigment is dispersed;
The resin material includes a monomer component x1 represented by the following formula (1), a monomer component x2 represented by the following formula (2), and a monomer component x3 represented by the following formula (3): Polymer X containing monomer component x4 represented by the following formula (4), monomer component z1 represented by the following formula (5), and monomer component represented by the following formula (6) A color filter ink comprising a polymer Z containing z2 and a monomer component z3 represented by the following formula (7).

The content of the monomer component x1 in the total components constituting the polymer X is 30 to 90 w.
t%,
The content of the monomer component x2 in the total components constituting the polymer X is 5 to 60 wt.
%
The content of the monomer component x3 in the total components constituting the polymer X is 2 to 20 wt.
%
The content of the monomer component x4 in the total components constituting the polymer X is 2 to 20 wt.
The color filter ink according to claim 1, wherein the color filter ink is%. The content of the monomer component z1 in the total components constituting the polymer Z is 50 to 95 w.
t%,
The content of the monomer component z2 in the total components constituting the polymer Z is 3 to 35 wt.
%
The content of the monomer component z3 in the total components constituting the polymer Z is 2 to 30 wt.
The color filter ink according to claim 1, wherein the color filter ink is%. When the content of the polymer X in the color filter ink is C _X [wt%], and the content of the polymer Z in the color filter ink is C _Z [wt%], 0.
4. The color filter ink according to claim 1, wherein a relationship of 3 ≦ C _X / C _Z ≦ 9.0 is satisfied. The color filter ink according to any one of claims 1 to 4, wherein the polymer X has a weight average molecular weight of 1,000 to 50,000. The color filter ink according to claim 1, wherein the polymer Z has a weight average molecular weight of 5,000 to 50,000. From the group consisting of 1,3-butylene glycol diacetate, bis (2-butoxyethyl) ether, 2- (2-methoxy-1-methylethoxy) -1-methylethyl acetate and diethylene glycol monobutyl ether acetate as the dispersion medium The color filter ink according to any one of claims 1 to 6, comprising one or more selected. As the pigment, C.I. I. Pigment red 254, C.I. I. Pigment Red 177
, C.I. I. Pigment green 58, C.I. I. Pigment blue 15: 6, C.I. I. Pigment violet 23, C.I. I. Pigment yellow 138, C.I. I. The color filter ink according to any one of claims 1 to 7, comprising one or more selected from the group consisting of CI Pigment Yellow 150 and derivatives thereof. Polymer Z containing monomer component z1 represented by the following formula (5), monomer component z2 represented by the following formula (6), and monomer component z3 represented by the following formula (7) A polymer Z solution preparation step of preparing a polymer Z solution in which is dissolved in a solvent;
A fine dispersion step of adding a pigment to the polymer Z solution, adding inorganic beads in multiple stages and performing fine dispersion treatment to obtain a pigment dispersion;
The pigment dispersion, the monomer component x1 represented by the following formula (1), the monomer component x2 represented by the following formula (2), and the monomer component x3 represented by the following formula (3) And a polymer X mixing step of mixing a polymer X containing a monomer component x4 represented by the following formula (4): A method for producing a color filter ink.

A color filter ink set comprising a plurality of inks used in the manufacture of color filters,
The color filter ink set according to claim 1, wherein at least one of the plurality of types of inks constituting the color filter ink set is the color filter ink according to claim 1. 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.   The image display device according to claim 13, wherein the image display device is a liquid crystal panel.   An electronic apparatus comprising the image display device according to claim 13.

Images