JP2009180769A - Ink set for color filter, manufacturing method of color filter, color filter, image display device, and electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ink set for color filters of an inkjet system stably and appropriately usable for manufacturing of the color filters which are excellent in discharge stability, and are excellent in preservable stability as well, are suppressed in color unevenness in areas and density unevenness, to provide a method for manufacturing such color filters, and color filters, also, to provide an image display device provided with the color filters, and an electronic device. <P>SOLUTION: The ink set for the color filter is used for manufacturing the color filters having coloring parts within a number of cells disposed on a substrate by an inkjet system, and includes coloring ink containing a colorant and an uncured resin material, and ink for curing containing a curing agent for accelerating the curing reaction of the uncured resin material by being discharged into the same cells as those of the coloring ink. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

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

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

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

  However, since the ink used for manufacturing a conventional color filter contains a curing agent of a resin material such as a polymerization initiator in the ink, the viscosity of the ink is relatively high, and the ink is stably ejected from the inkjet head. It was difficult. In addition, since the conventional ink contains the curing agent of the resin material as described above, the viscosity tends to increase with time, and there is a problem in storage stability. In general, ink used for manufacturing a color filter is completely different from that applied to a printer (for consumer use) and is continuously ejected over a long period of time. As described above, when ink is continuously ejected from the ink jet head, the temperature in the head rises, and there is a problem that the resin material contained in the ink is cured by the temperature rise. When the curing of the resin material contained in the ink proceeds in this way, the viscosity of the ink increases, the ink discharge portion of the ink jet head is clogged, and discharge failure occurs. In addition, it is conceivable to discharge the ink while cooling the ink jet head to suppress the progress of the curing, but if the temperature is lowered, the viscosity of the ink increases, and the ink cannot be stably discharged. It was.

JP 2002-372613 A

  An object of the present invention is an ink jet which can be stably and suitably used for the production of a color filter having excellent ejection stability from an ink jet head and excellent storage stability and suppressing color unevenness and density unevenness at a site. Providing a color filter ink set, providing a color filter manufacturing method that can be stably and suitably used for manufacturing a color filter in which uneven color and uneven density at the site are suppressed; The present invention is to provide a color filter in which color unevenness and density unevenness are suppressed, and to provide an image display device and an electronic apparatus provided with the color filter.

Such an object is achieved by the present invention described below.
The color filter ink set of the present invention is a color filter ink set used for producing a color filter having a colored portion in a large number of cells provided on a substrate by an inkjet method,
A colored ink comprising a colorant and an uncured resin material;
And a curing ink containing a curing agent that accelerates a curing reaction of the uncured resin material by being discharged into the same cell as the colored ink.
As a result, the inkjet head color is excellent in ejection stability from the inkjet head, is excellent in storage stability, and can be stably and suitably used for the production of a color filter with suppressed color unevenness and density unevenness at the site. An ink set for a filter can be provided.

In the color filter ink set of the present invention, it is preferable that the uncured resin material contains an epoxy resin.
Thereby, the adhesiveness with respect to the board | substrate of the coloring part formed using the ink set for color filters can further be improved. Further, the chemical resistance (solvent resistance) of the colored portion can be made higher.

In the color filter ink set of the present invention, it is preferable that the uncured resin material contains a polymer A containing at least an epoxy group-containing vinyl monomer a1 as a monomer component.
As a result, the adhesion of the colored portion formed using the color filter ink set to the substrate, chemical resistance (solvent resistance), etc. can be made particularly excellent, and the discharge stability of the colored ink can be improved. It can be made particularly excellent.

In the color filter ink set of the present invention, the polymer A includes, as a monomer component, an isocyanate group or a blocked isocyanate group in which the protective group is protected in addition to the epoxy group-containing vinyl monomer a1. It is preferable that the copolymer contains a vinyl monomer a2.
As a result, the gas content in the colored ink (dissolved gas, bubbles present as microbubbles, etc.) can be lowered more effectively, and the droplet discharge stability by the ink jet method is particularly excellent. Become.

In the color filter ink set of the present invention, the polymer A is a copolymer comprising a vinyl monomer a3 having a hydroxyl group in addition to the epoxy group-containing vinyl monomer a1 as a monomer component. It is preferably a coalescence.
Thereby, the adhesiveness with respect to the board | substrate of the coloring part formed especially, especially the adhesiveness in the case of being repeatedly exposed to the rapid temperature change accompanying an image display can be made excellent.

これにより、着色インク中における気体の含有率を低くすることができ、着色インクの吐出安定性を特に優れたものとすることができる。 In the color filter ink set of the present invention, the uncured resin material comprises a polymer B containing at least an alkoxysilyl group-containing vinyl monomer represented by the following formula (1) as a monomer component. Furthermore, it is preferable to include.

Thereby, the gas content in the colored ink can be lowered, and the discharge stability of the colored ink can be made particularly excellent.

In the color filter ink set of the present invention, the ratio between the content of the polymer A and the content of the polymer B in the colored ink is 25:75 to 75:25 in terms of weight ratio. preferable.
Thereby, the dispersion stability of the colorant in the colored ink and the discharge stability of the colored ink can be made particularly excellent. Further, in the produced color filter, it is possible to more surely prevent color unevenness and density unevenness at each part, and to make the uniformity of characteristics among individuals particularly excellent. Further, the durability of the color filter can be made particularly excellent.

これにより、着色インクの吐出安定性を特に優れたものとすることができる。特に、液滴吐出ヘッドのノズルからの液切れが良好になるとともに、着色インクの固形分のノズルへの固着等をより効果的に防止することができる。また、形成される着色部の耐熱性を特に優れたものとすることができる。 In the color filter ink set of the present invention, the uncured resin material contains at least a fluoroalkyl group- or fluoroaryl group-containing vinyl monomer c1 represented by the following formula (2) as a monomer component. It is preferable that the polymer C to be further included.

Thereby, the discharge stability of the colored ink can be made particularly excellent. In particular, the liquid discharge from the nozzles of the droplet discharge head can be improved, and the colored ink can be more effectively prevented from sticking to the nozzles. Moreover, the heat resistance of the colored part to be formed can be made particularly excellent.

In the color filter ink set of the present invention, the ratio of the content of the polymer A to the content of the polymer C in the colored ink is 50:50 to 99: 1 in terms of weight ratio. preferable.
As a result, the dispersion stability of the colorant in the colored ink and the discharge stability of the colored ink are made particularly excellent, and color unevenness and density unevenness at each part of the color filter are more effectively prevented. The uniformity of the characteristics of the color filter can be made particularly excellent, and the durability of the color filter can be made particularly excellent.

The color filter ink set of the present invention preferably includes a plurality of types of the colored inks and at least one resin material curing ink.
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.

The method for producing a color filter of the present invention is a method for producing a color filter by discharging ink by an inkjet method onto a substrate provided with a large number of cells,
A colored ink application step of discharging a colored ink containing a colorant and an uncured resin material into the cell;
And a curing ink applying step for discharging a curing ink containing a curing agent that accelerates the curing of the uncured resin material into the cell that discharges the colored ink.
In this way, the colored ink and the curing ink are separately ejected into the cell, so that it is possible to reliably prevent the viscosity of each ink from increasing, and the ejection stability of each ink is excellent. can do.

The color filter of the present invention is manufactured using the color filter ink set of the present invention.
Thereby, it is possible to provide a color filter in which uneven color and uneven density in each part are suppressed.
The color filter of the present invention is manufactured using the method of the present invention.
Thereby, it is possible to provide a color filter in which uneven color and uneven density in each part are suppressed.

An image display device according to the present invention includes the color filter according to the present invention.
As a result, color unevenness and density unevenness in each part of the display unit are suppressed, excellent uniformity of characteristics among individuals, image display with excellent brightness and contrast is possible, and excellent durability An 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 and density unevenness in each part of the display unit are suppressed, excellent uniformity of characteristics among individuals, image display with excellent brightness and contrast is possible, and excellent durability Electronic equipment can be provided.

Hereinafter, preferred embodiments of the present invention will be described in detail.
<Ink set>
The ink set for a color filter of the present invention is an ink set used for manufacturing a color filter (forming a colored portion of a color filter), and particularly used for manufacturing a color filter by an ink jet method.

  By the way, the ink used for manufacturing the color filter by the ink jet method which has been studied in recent years contains a curing agent of a resin material such as a polymerization initiator in the ink, so that the viscosity of the ink is relatively high and stable. Thus, it is difficult to discharge from the inkjet head (droplet discharge head). In addition, since the conventional ink contains the curing agent of the resin material as described above, the viscosity tends to increase with time, and there is a problem in storage stability. In general, ink used for manufacturing a color filter is completely different from that applied to a printer (for consumer use) and is continuously ejected over a long period of time. As described above, when ink is continuously ejected from the ink jet head, the temperature in the head rises, and there is a problem that the resin material contained in the ink is cured by the temperature rise. When the curing of the resin material contained in the ink proceeds in this way, the viscosity of the ink increases, the ink discharge portion of the ink jet head is clogged, and discharge failure occurs. In addition, it is conceivable to discharge the ink while cooling the ink jet head to suppress the progress of the curing, but if the temperature is lowered, the viscosity of the ink increases, and the ink cannot be stably discharged. It was.

Therefore, as a result of intensive studies, the present inventors have included a curing agent in a different ink from the ink containing the uncured resin material, and mixed the two inks when forming the colored portion. As a result, the inventors have found that the above problems can be solved, and have completed the present invention. That is, the color filter ink set of the present invention includes a colored ink containing a colorant and an uncured resin material, and an uncured resin in the colored ink by being discharged into the same cell as the colored ink. And a curing ink containing a curing agent that accelerates the curing reaction of the material.
Thus, the following effects can be obtained by using the color filter ink set having the curing ink in addition to the colored ink.

Generally, when the resin material and the curing agent are contained in the same ink, the ink has a relatively high viscosity. On the other hand, as in the present invention, by including the resin material and the curing agent in different inks, the viscosity of the colored ink containing the uncured resin material can be made relatively low. Ink (colored ink) can be stably ejected from the droplet ejection head. Further, since the colored ink does not contain a curing agent, an increase in viscosity over time due to a curing reaction of an uncured resin material is suppressed, and the storage stability is excellent. Further, even when the temperature in the head rises due to continuous ejection in the droplet ejection head, it is possible to suppress the progress of the curing reaction of the resin material in the colored ink. The viscosity can be prevented from extremely increasing, and the ink can be ejected stably. Further, clogging in the vicinity of the discharge portion of the droplet discharge head can be prevented. This also facilitates maintenance of the droplet discharge device.
In the present invention, the uncured resin material refers to a resin material that has not yet been cured, and may include a polymer in which some monomer components are polymerized.

Such an ink set for a color filter is preferably provided with a plurality of types of colored inks.
Further, the color filter ink set only needs to include at least one type of curing ink, and may include a plurality of types. In the following description, the color filter ink set will be described as having one type of curing ink and using the curing ink for all colored inks.

[Colored ink (ink for color filter)]
The colored ink constituting the color filter ink set includes a colorant, an uncured resin material, and the like. Further, the colored ink is substantially free of a curing agent that accelerates the curing reaction of the uncured resin material. By not containing the curing agent in this way, the colored ink has excellent storage stability (long-term stability) and excellent ejection stability. The phrase “substantially free of curing agent” means that the content of the curing agent in the colored ink is 500 ppm or less.

<Uncured resin material>
The colored ink constituting the color filter ink set includes an uncured resin material. Thereby, the adhesiveness with respect to the board | substrate of the coloring part formed using the ink set for color filters can be improved. Further, even when chemical application or cleaning is performed as a subsequent process of the ink application process by the ink jet method, it is possible to prevent the colored portion from being adversely affected.
Although it does not specifically limit as such a resin material, It is preferable that the epoxy resin is included. Thereby, the adhesiveness with respect to the board | substrate of the coloring part formed using the ink set for color filters can further be improved. Further, the chemical resistance (solvent resistance) of the colored portion can be made higher.

  The uncured epoxy resin preferably contains a polymer A containing at least an epoxy group-containing vinyl monomer a1 as a monomer component. As a result, the adhesion of the colored portion formed using the color filter ink set to the substrate, chemical resistance (solvent resistance), etc. can be made particularly excellent, and the discharge stability of the colored ink can be improved. It can be made particularly excellent. As a result, even when droplet ejection is performed for a long period of time by the inkjet method, or when droplet ejection is performed continuously, the trajectory of the ejected droplet changes (so-called flight bending occurs) It is possible to prevent more reliably the occurrence of problems such as the inability to land the droplet on the site for the purpose and the unstable discharge amount of the droplet. Moreover, the storage stability of colored ink can be made higher by including a polymer in an uncured resin material.

[Polymer A]
Hereinafter, the polymer A will be described in detail.
The polymer A contains at least an epoxy group-containing vinyl monomer a1 as a monomer component. The polymer A may consist essentially of a single compound, or may be a mixture of a plurality of types of compounds. However, when the polymer A is a mixture of a plurality of types of compounds, each compound contains at least an epoxy group-containing vinyl monomer a1 as a monomer component.

(Epoxy group-containing vinyl monomer a1)
The polymer A contains at least an epoxy group-containing vinyl monomer a1 as a monomer component. By containing such an epoxy group-containing vinyl monomer a1 as a monomer component, an epoxy group can be easily and reliably introduced into the polymer A. Further, by containing the epoxy group-containing vinyl monomer a1 as a monomer component, it is possible to improve the dispersion stability of the pigment as described above in the colored ink, and the storage stability of the colored ink. (Long-term storage stability) and discharge stability can be improved. Further, by containing the epoxy group-containing vinyl monomer a1 as a monomer component, the colored portion formed using the color filter ink set is excellent in chemical resistance (solvent resistance). be able to. Further, by containing the epoxy group-containing vinyl monomer a1 as a monomer component, when forming the colored portion (when mixed with the curing ink described later), the curing reaction proceeds relatively slowly, It is possible to effectively prevent uneven color due to a rapid curing reaction. Further, it is advantageous for improving the hardness of the colored portion to be formed. In addition, when the polymer A contains a vinyl monomer a2, a vinyl monomer a3, and the like as described later, the polymer can be suitably synthesized, and the polymer A having desired characteristics can be easily obtained. And it can be obtained reliably.

  As the epoxy group-containing vinyl monomer a1, for example, one having a structure represented by the following formula (3) can be used. When the epoxy group-containing vinyl monomer a1 has such a structure, the dispersion stability of the pigment as described above in the colored ink can be made particularly excellent, and the color filter ink can be stored. Stability and ejection stability can be made particularly excellent. In addition, when the epoxy group-containing vinyl monomer a1 has a structure represented by the following formula (3), the solvent resistance of the colored portion formed using the color filter ink set is more excellent. It can be. Further, when the epoxy group-containing vinyl monomer a1 has a structure represented by the following formula (3), it is relatively gentle when forming a colored portion (when mixed with a curing ink described later). It is possible to effectively prevent the curing reaction from proceeding and the occurrence of uneven color due to the rapid curing reaction. In addition, it is advantageous to make the formed colored portion particularly excellent in hardness and the like. Further, when the epoxy group-containing vinyl monomer a1 has such a structure, the compatibility between the polymer A and the polymer B described later can be made particularly excellent, and the color formed The transparency of the part can be made particularly high.

In the formula (3), examples of the alkyl group having 1 to 7 carbon atoms represented by R ⁶ include alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, pentyl, hexyl, heptyl group and the like. However, a hydrogen atom or an alkyl group having 1 to 2 carbon atoms is preferable, and a hydrogen atom or a methyl group is more preferable. Thereby, the dispersion stability of the colorant in the colored ink can be made particularly excellent, and the long-term storage stability and ejection stability of the colored ink (color filter ink) can be made particularly excellent. . Further, in the manufactured color filter, the contrast of the displayed image can be made particularly excellent. Moreover, the hardness etc. of the colored part formed can be made excellent. In addition, the compatibility between the polymer A and the polymer B described later can be made particularly excellent, and the transparency of the formed colored portion can be made extremely high.
In the formula (3), as a typical example of the hydrocarbon group which may contain a divalent hetero atom represented by G, a linear or branched alkylene group, more specifically, for example, Examples include methylene, ethylene, propylene, tetramethylene, ethylethylene, pentamethylene, hexamethylene, oxymethylene, oxyethylene, and oxypropylene.

  Specific examples of the epoxy group-containing vinyl monomer a1 include, for example, glycidyl (meth) acrylate, methyl glycidyl (meth) acrylate, ethyl glycidyl (meth) acrylate, glycidyl vinyl benzyl ether (manufactured by Seimi Chemical Co., Ltd., Trade name VBGE), alicyclic epoxy group-containing unsaturated compounds represented by the following formulas (3-1) to (3-31), and the like, and one or more selected from these are combined As the epoxy group-containing vinyl monomer a1, (3,4-epoxycyclohexyl) methyl (meth) acrylate is particularly preferable. Thereby, the dispersion stability of the colorant in the colored ink can be made particularly excellent, and the long-term storage stability and ejection stability of the color filter ink can be made particularly excellent. Moreover, the hardness of the colored part to be formed, solvent resistance, etc. can be made particularly excellent. Further, the compatibility between the polymer A and the polymer B described later can be made particularly excellent, and the transparency of the formed colored portion can be made extremely high.

In formulas (3-1) to (3-31), R ⁷ represents a hydrogen atom or a methyl group, R ⁸ represents a divalent hydrocarbon group having 1 to 8 carbon atoms, and R ⁹ represents And a C1-C20 divalent hydrocarbon group. R ⁷ , R ⁸ and R ⁹ may be the same or different from each other. Moreover, w shows 0-10.
The content of the epoxy group-containing vinyl monomer a1 in the polymer A (value obtained by conversion in terms of the weight of the monomer used for the synthesis of the polymer) is preferably 50 to 99 wt%, and preferably 70 to More preferably, it is 94 wt%. When the content of the epoxy group-containing vinyl monomer a1 in the polymer A is a value within the above range, the dispersion stability of the colorant in the colored ink can be improved, and the color filter ink The long-term storage stability and discharge stability can be improved. In addition, when the content of the epoxy group-containing vinyl monomer a1 in the polymer A is a value within the above range, when forming a colored portion (when mixed with a curing ink described later), it is relatively slow. It is possible to effectively prevent the occurrence of color unevenness due to a rapid curing reaction, and the colored portion to be formed has particularly excellent hardness, solvent resistance, etc. it can. In addition, when the polymer A is a mixture of a plurality of types of compounds, the content of the epoxy group-containing vinyl monomer a1 is a weighted average value (weighted average value based on a weight ratio) for these compounds. ) Can be adopted. Moreover, when the polymer A is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the epoxy group-containing vinyl monomer a1 with the content as described above.

(Vinyl monomer a2)
The polymer A only needs to contain at least an epoxy group-containing vinyl monomer a1 as a monomer component. In addition to the epoxy group-containing vinyl monomer a1, the polymer A further has an isocyanate group or a protective group. It is preferably a copolymer (copolymer) containing a vinyl monomer a2 having a blocked isocyanate group protected with a group as a monomer component. As a result, the gas content in the colored ink (dissolved gas, bubbles present as microbubbles, etc.) can be lowered more effectively, and the droplet discharge stability by the ink jet method is particularly excellent. Become. As a result, in the manufactured color filter, it is possible to more effectively prevent color unevenness, density unevenness, and characteristic variation among individuals from occurring in each part.
Examples of the polymerizable vinyl monomer a2 include 2-acryloyloxyethyl isocyanate (manufactured by Showa Denko KK, trade name “Karenz MOI”), 2-methacryloyloxyethyl isocyanate, etc., (meth) acryloyl groups having a carbon number. (Meth) acryloyl isocyanate etc. which couple | bonded with the isocyanate group through 2-6 alkylene groups are mentioned.

  The isocyanate group of the (meth) acryloyl isocyanate is preferably a blocked isocyanate group. The blocked isocyanate group here refers to an isocyanate group whose end is masked with a blocking agent. Examples of the monomer having a blocked isocyanate group include 2- (0- [1′methylpropylideneamino] carboxyamino) ethyl methacrylate and the like, and “Karenz MOI-BM” manufactured by Showa Denko KK It is marketed with the brand name. These polymerizable vinyl monomers can be used alone or in combination of two or more.

  The content of the vinyl monomer a2 in the polymer A (value obtained by conversion based on the weight of the monomer used for polymer synthesis) is 2 with respect to 100 parts by weight of the epoxy group-containing vinyl monomer a1. It is preferably ˜20 parts by weight, more preferably 3 to 15 parts by weight. When the content of the vinyl monomer a2 in the polymer A is a value within the above range, the content of the gas in the colored ink (dissolved gas, Bubbles that exist as microbubbles or the like) can be reduced more effectively, and the droplet discharge stability by the ink jet method is particularly excellent. Moreover, the transparency of the colored part to be formed can be made sufficiently high. On the other hand, when the content of the vinyl monomer a2 in the polymer A is less than the lower limit, the effect of containing the vinyl monomer a2 as described above may not be sufficiently exhibited. Further, when the content of the vinyl monomer a2 in the polymer A exceeds the upper limit, the compatibility between the polymer A and the polymer B described later is lowered, and the transparency of the formed colored portion is sufficiently increased. It can be difficult to be superior. In addition, when the polymer A 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 vinyl monomer a2. can do. Moreover, when the polymer A is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the vinyl monomer a2 with the content as described above.

(Vinyl monomer a3)
The polymer A only needs to contain at least an epoxy group-containing vinyl monomer a1 as a monomer component. In addition to the epoxy group-containing vinyl monomer a1, the polymer A further includes a vinyl monomer having a hydroxyl group. It is preferable that the monomer a3 is contained as a monomer component (copolymer). Thereby, the adhesiveness with respect to the board | substrate of the coloring part formed especially, especially the adhesiveness in the case of being repeatedly exposed to the rapid temperature change accompanying an image display can be made excellent. As a result, for example, even when the color filter is used for a long period of time, it is possible to more reliably prevent problems such as light leakage (white spots, bright spots). That is, the durability of the color filter can be made particularly excellent. Further, if the polymer A contains the vinyl monomer a3 as a monomer component, the compatibility between the polymer A and the polymer B described later can be made particularly excellent. , The transparency of the colored portion to be formed can be made extremely high.

  Examples of the vinyl monomer a3 include 2-hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, 2,3-dihydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and 6-hydroxyhexyl. Monoesterified product of polyhydric alcohol and acrylic acid or methacrylic acid, such as (meth) acrylate, 8-hydroxyoctyl (meth) acrylate, 4-hydroxymethylcyclohexyl (meth) acrylate, polyalkylene glycol mono (meth) acrylate, Compounds obtained by ring-opening polymerization of ε-caprolactone to the monoesterified product of polyhydric alcohol and acrylic acid or methacrylic acid (Dacel Chemical Industries, Ltd. Plaxel FA series, Plaxel FM series, etc.) or ethylene Kisaido compound was ring-opening polymerization of propylene oxide and the like, may be used alone or in combination of two or more selected from these.

  The content of the vinyl monomer a3 in the polymer A (value obtained by conversion based on the weight of the monomer used for polymer synthesis) is 2 with respect to 100 parts by weight of the epoxy group-containing vinyl monomer a1. It is preferably ˜20 parts by weight, more preferably 3 to 15 parts by weight. When the content of the vinyl monomer a3 in the polymer A is a value within the above range, the durability of the color filter manufactured using the colored ink while sufficiently improving the storage stability of the colored ink is ensured. The property can be made particularly excellent. Moreover, the transparency of the colored part formed can be made high. On the other hand, when the content of the vinyl monomer a3 in the polymer A is less than the lower limit, the effect of containing the vinyl monomer a3 as described above may not be sufficiently exhibited. If the content of the vinyl monomer a3 in the polymer A exceeds the upper limit, it may be difficult to make the gas content in the colored ink sufficiently low. In addition, when the polymer A 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 vinyl monomer a3. can do. Moreover, when the polymer A is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the vinyl monomer a3 with the content as described above.

(Other polymerizable vinyl monomer a4)
The polymer A contains the above-mentioned epoxy group-containing vinyl monomer a1, vinyl monomer a2, and polymerizable vinyl monomer a4 other than the vinyl monomer a3 as monomer components. Also good. As such a polymerizable vinyl monomer a4, a vinyl monomer copolymerizable with the epoxy group-containing vinyl monomer a1 can be used, and specifically, for example, methyl (meth) acrylate, ethyl (Meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, phenyl (meth) acrylate, cyclohexyl (meth) acrylate, dicyclopentanyl (meth) acrylate, dicyclopentanyloxyethyl (meth) acrylate Alkyl having 1 to 12 carbon atoms such as isobornyl (meth) acrylate, benzyl (meth) acrylate, and phenylethyl (meth) acrylate, aralkyl (meth) acrylate; vinyl aromatic compounds such as styrene and α-methylstyrene; CF ₃ (CF ₂ ) ₃ CH ₂ CH═C H ₂ , CF ₃ (CF ₂ ) ₃ CH═CH ₂ , CF ₃ (CF ₂ ) ₅ CH ₂ CH═CH ₂ , CF ₃ (CF ₂ ) ₅ CH═CH ₂ , CF ₃ (CF ₂ ) ₇ CH═ CH ₂ , CF ₃ (CF ₂ ) ₉ CH ₂ CH═CH ₂ , CF ₃ (CF ₂ ) ₉ CH═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₂ CH ₂ CH═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₂ CH═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₄ CH ₂ CH═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₄ CH═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₆ CH ₂ CH═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₆ CH═CH ₂ , F ₅ C ₆ CH═CH ₂ , CF ₃ (CF ₂ ) ₅ CH ₂ CH ₂ OCH ₂ CH═CH ₂ , CF ₃ (CF ₂ ) ₅ CH ₂ CH ₂ CH ₂ OCH ₂ CH═CH ₂ , CF ₃ (CF ₂ ) ₇ CH ₂ CH ₂ OCH ₂ CH═CH ₂ , CF ₃ (CF ₂ ) ₇ CH ₂ CH ₂ CH ₂ OCH ₂ CH═CH ₂ , CF ₃ (CF ₂ ) ₉ CH ₂ CH ₂ OCH ₂ CH═CH ₂ , CF ₃ (CF ₂ ) ₉ CH ₂ CH ₂ CH ₂ OCH ₂ CH═CH ₂ , H (CF ₂ ) ₆ CH ₂ OCH _{2 CH = CH 2, H (CF} 2) 8 CH 2 OCH 2 CH = CH 2, (CF 3) 2 CF (CF 2) 2 CH 2 CH 2 OCOCH = CH 2, (CF 3) 2 CF (CF 2) ₂ CH ₂ CH ₂ OCOC (CH ₃ ) ═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₄ CH ₂ CH ₂ OCOCH═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₄ CH ₂ C H ₂ OCOC (CH ₃ ) ═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₆ CH ₂ CH ₂ OCOCH═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₆ CH ₂ CH ₂ OCOC (CH ₃ ) = CH ₂ , CF ₃ (CF ₂ ) ₅ CH ₂ CH ₂ OCOCH═CH ₂ , CF ₃ (CF ₂ ) ₅ CH ₂ CH ₂ OCOC (CH ₃ ) ═CH ₂ , CF ₃ (CF ₂ ) ₇ CH ₂ CH ₂ OCOCH═CH ₂ , CF ₃ (CF ₂ ) ₇ CH ₂ CH ₂ OCOC (CH ₃ ) ═CH ₂ , CF ₃ (CF ₂ ) ₉ CH ₂ CH ₂ OCOCH═CH ₂ , CF ₃ (CF ₂ ) _{9 CH 2 CH 2 OCOC (CH 3} ) = CH 2, H (CF 2) 6 CH 2 CH 2 OCOCH = CH 2, H (CF 2) 8 CH 2 CH 2 OCOC (CH 3) = _{H 2, F (CF 2)} 8 CH 2 CH 2 OCOCH = CH 2, F (CF 2) 8 CH 2 CH 2 OCOC (CH 3) = CH 2, H (CF 2) 4 CH 2 OCOC (CH 3) Fluoroalkyl groups or fluoroaryl group-containing vinyl compounds such as ═CH ₂ , H (CF ₂ ) ₄ CH ₂ OCOCH═CH _{2, and the} like, and one or more selected from these may be used in combination. it can. However, the polymer A does not contain an alkoxysilyl group-containing vinyl monomer b1 as described later as a monomer component.

  The content of the polymerizable vinyl monomer a4 in the polymer A (value obtained by conversion based on the weight of the monomer used for polymer synthesis) is 100 parts by weight of the epoxy group-containing vinyl monomer a1. , Preferably 20 parts by weight or less, and more preferably 10 parts by weight or less. In addition, when the polymer A is a mixture of a plurality of types of compounds, the value of the content of the polymerizable vinyl monomer a4 is a weighted average value (weighted average value based on weight ratio) for these compounds. Can be adopted. Moreover, when the polymer A is a mixture of a plurality of types of compounds, it is preferable that the content of the polymerizable vinyl monomer a4 satisfies the above conditions for each compound.

As described above, the polymer A only needs to contain at least an epoxy group-containing vinyl monomer a1 as a monomer component, but in addition to the epoxy group-containing vinyl monomer a1, It is preferable to contain the body a2 and the vinyl monomer a3. Thereby, the effect by including the vinyl monomer a2 as described above and the effect by including the vinyl monomer a3 as described above can be compatible.
The ratio (content ratio) of the polymer A in the curable resin material (binder resin) is not particularly limited, but is preferably 25 to 80 wt%, and more preferably 33 to 70 wt%. In addition, when the polymer A is a mixture of a plurality of types of compounds, the total content of these compounds is adopted as the content of the polymer A.

[Polymer B]
Further, the uncured resin material includes, in addition to the above components, a polymer B containing at least an alkoxysilyl group-containing vinyl monomer b1 represented by the following formula (1) as a monomer component. May be.

Such a polymer B is preferably used together with the polymer A described above. Thereby, the gas content in the colored ink can be lowered, and the discharge stability of the colored ink can be made particularly excellent. Further, when the uncured resin material contains the polymer B together with the polymer A, the durability of the produced color filter can be made particularly excellent. Further, the mixing stability of the uncured resin material and the colorant can be made excellent over a long period of time, and a color filter excellent in contrast can be produced stably over a long period of time. Moreover, when the uncured resin material contains the polymer B together with the polymer A, the light resistance of the formed colored portion can be made excellent. In general, dyes are inferior in light resistance as compared to pigments, but even if the colored ink contains a dye as a colorant, the light resistance of the formed colored part should be sufficiently excellent. Can do. In addition, since the colored ink once prepared can be used favorably for a long period of time, it is possible to reduce the frequency of replacement of the colored ink and replacement of the colored ink in the droplet discharge device. Can be made particularly excellent, and the quality stability of the produced color filter is also improved.
The polymer B may consist essentially of a single compound, or may be a mixture of a plurality of types of compounds. However, when the polymer B is a mixture of a plurality of types of compounds, each compound contains at least an alkoxysilyl group-containing vinyl monomer b1 as a monomer component.

(Alkoxysilyl group-containing vinyl monomer b1)
The polymer B contains at least the alkoxysilyl group-containing vinyl monomer b1 represented by the formula (1) as a monomer component. By containing such an alkoxysilyl group-containing vinyl monomer b1 as a monomer component, an alkoxysilyl group can be easily and reliably introduced into the polymer B. Further, by containing the alkoxysilyl group-containing vinyl monomer b1 as a monomer component, all of the hardness of the colored portion to be formed, adhesion to the substrate, light resistance, heat resistance, etc. are sufficiently excellent. Can be. Further, when the polymer B contains a vinyl monomer b2 or the like as will be described later, the synthesis of the polymer can be suitably performed, and the polymer B having desired characteristics can be obtained easily and reliably. it can.

In the formula (1), examples of the alkyl group having 1 to 7 carbon atoms represented by R ¹ include alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, s-butyl, pentyl, hexyl, heptyl group and the like. However, a hydrogen atom or an alkyl group having 1 to 2 carbon atoms is preferable, and a hydrogen atom or a methyl group is more preferable. As a result, the dispersion stability of the pigment in the color filter ink (colored ink) and the discharge stability of the color filter ink can be made particularly excellent, the hardness of the formed colored portion, and the adhesion to the substrate Property, light resistance, heat resistance and the like can be made particularly excellent. Further, the compatibility between the polymer A and the polymer B can be made particularly excellent, and the transparency of the formed colored part can be made particularly high.

  In the formula (1), as a representative example of the divalent hydrocarbon group represented by E, a linear or branched alkylene group, more specifically, for example, methylene, ethylene, propylene, tetramethylene, Examples include ethylethylene, pentamethylene, hexamethylene and the like. Among these, a C1-C3 linear alkylene group (for example, a methylene, ethylene, a propylene group) is especially preferable.

In the formula (1), the alkyl group having 1 to 6 carbon atoms represented by R ² , R ³ and R ⁴ is a linear or branched alkyl group such as methyl, ethyl, propyl, isopropyl, butyl, Examples include isobutyl, s-butyl, pentyl, hexyl group and the like. Examples of the alkoxyl group having 1 to 6 carbon atoms represented by R ² and R ³ include linear or branched alkoxyl groups such as methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, s-butoxy, pentoxy, A hexyloxy group etc. are mentioned.

  Specific examples of the monomer represented by the formula (1) include vinyltrimethoxysilane, vinyltriethoxysilane, vinylmethyldimethoxysilane, vinylmethyldiethoxysilane, and γ- (meth) acryloyloxypropyltrimethoxy. Silane, γ- (meth) acryloyloxypropylmethyldimethoxysilane, γ- (meth) acryloyloxypropylmethyldiethoxysilane, γ- (meth) acryloyloxypropyltriethoxysilane, β- (meth) acryloyloxyethyltrimethoxysilane And alkoxysilyl group-containing polymerizable unsaturated compounds such as γ- (meth) acryloyloxybutylphenyldimethoxysilane, and the like, and one or more selected from these can be used in combination.

  The content of the alkoxysilyl group-containing vinyl monomer b1 in the polymer B (value obtained by conversion in terms of the weight of the monomer used for the synthesis of the polymer) is preferably 70 to 100 wt%, and 80 More preferably, it is -100 wt%. When the content of the alkoxysilyl group-containing vinyl monomer b1 in the polymer B is within the above range, the dispersion stability of the pigment in the colored ink and the discharge stability of the colored ink are particularly excellent. be able to. Moreover, the hardness of the colored part to be formed, adhesion to the substrate, light resistance, heat resistance, and the like can be made particularly excellent. In addition, when the polymer B is a mixture of a plurality of types of compounds, the value of the content of the alkoxysilyl group-containing vinyl monomer b1 is a weighted average value (weighted average based on weight ratio) for these compounds. Value). Moreover, when the polymer B is a mixture of a plurality of types of compounds, it is preferable that all of these compounds contain the alkoxysilyl group-containing vinyl monomer b1 at the content described above.

(Other polymerizable vinyl monomer b2)
The polymer B only needs to contain at least an alkoxysilyl group-containing vinyl monomer b1 as a monomer component. In addition to the alkoxysilyl group-containing vinyl monomer b1, the polymer B further contains an alkoxysilyl group. A polymerizable vinyl monomer b2 other than the vinyl monomer b1 may be contained as a monomer component. As such a polymerizable vinyl monomer b2, a vinyl monomer copolymerizable with the alkoxysilyl group-containing vinyl monomer b1 can be used. Specifically, for example, 2-hydroxyethyl (meta ) Acrylate, hydroxypropyl (meth) acrylate, 2,3-dihydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 8-hydroxyoctyl (meth) acrylate, 4- For monoesterified products of polyhydric alcohol and acrylic acid or methacrylic acid, such as hydroxymethylcyclohexyl (meth) acrylate, polyalkylene glycol mono (meth) acrylate, and monoesterified products of polyhydric alcohol and acrylic acid or methacrylic acid ε-Caprolak A polymerizable vinyl monomer having a hydroxyl group, such as a compound obtained by ring-opening polymerization of ethylene (Placcel FA series, Plaxel FM series, etc. manufactured by Daicel Chemical Industries, Ltd.) or a compound obtained by ring-opening polymerization of ethylene oxide or propylene oxide; (Meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, phenyl (meth) acrylate, cyclohexyl (meth) acrylate, dicyclopentanyl (meth) acrylate, dicyclopentanyloxy C1-C12 alkyl such as ethyl (meth) acrylate, isobornyl (meth) acrylate, benzyl (meth) acrylate, phenylethyl (meth) acrylate, aralkyl (meth) acrylate; styrene, α-methylstyrene Vinyl aromatic compounds such _{as; CF 3 (CF 2) 3} CH 2 CH = CH 2, CF 3 (CF 2) 3 CH = CH 2, CF 3 (CF 2) 5 CH 2 CH = CH 2, CF 3 ( CF ₂ ) ₅ CH═CH ₂ , CF ₃ (CF ₂ ) ₇ CH═CH ₂ , CF ₃ (CF ₂ ) ₉ CH ₂ CH═CH ₂ , CF ₃ (CF ₂ ) ₉ CH═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₂ CH ₂ CH═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₂ CH═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₄ CH ₂ CH═CH ₂ , ( _{CF 3) 2 CF (CF 2} ) 4 CH = CH 2, (CF 3) 2 CF (CF 2) 6 CH 2 CH = CH 2, (CF 3) 2 CF (CF 2) 6 CH = CH 2, F _{5 C 6 CH = CH 2,} CF 3 (CF 2 _{5 CH 2 CH 2 OCH 2 CH} = CH 2, CF 3 (CF 2) 5 CH 2 CH 2 CH 2 OCH 2 CH = CH 2, CF 3 (CF 2) 7 CH 2 CH 2 OCH 2 CH = CH 2, CF ₃ (CF ₂ ) ₇ CH ₂ CH ₂ CH ₂ OCH ₂ CH═CH ₂ , CF ₃ (CF ₂ ) ₉ CH ₂ CH ₂ OCH ₂ CH═CH ₂ , CF ₃ (CF ₂ ) ₉ CH ₂ CH ₂ CH ₂ OCH ₂ CH═CH ₂ , H (CF ₂ ) ₆ CH ₂ OCH ₂ CH═CH ₂ , H (CF ₂ ) ₈ CH ₂ OCH ₂ CH═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₂ CH _{2 CH 2 OCOCH = CH 2,} (CF 3) 2 CF (CF 2) 2 CH 2 CH 2 OCOC (CH 3) = CH 2, (CF 3) 2 CF (CF 2) 4 CH 2 CH 2 _{COCH = CH 2, (CF 3} ) 2 CF (CF 2) 4 CH 2 CH 2 OCOC (CH 3) = CH 2, (CF 3) 2 CF (CF 2) 6 CH 2 CH 2 OCOCH = CH 2, ( _{CF 3) 2 CF (CF 2} ) 6 CH 2 CH 2 OCOC (CH 3) = CH 2, CF 3 (CF 2) 5 CH 2 CH 2 OCOCH = CH 2, CF 3 (CF 2) 5 CH 2 CH 2 OCOC (CH ₃ ) ═CH ₂ , CF ₃ (CF ₂ ) ₇ CH ₂ CH ₂ OCOCH═CH ₂ , CF ₃ (CF ₂ ) ₇ CH ₂ CH ₂ OCOC (CH ₃ ) ═CH ₂ , CF ₃ (CF _{2 ) 9 CH 2 CH 2 OCOCH =} CH 2, CF 3 (CF 2) 9 CH 2 CH 2 OCOC (CH 3) = CH 2, H (CF 2) 6 CH 2 CH 2 OCOCH = _{H 2, H (CF 2)} 8 CH 2 CH 2 OCOC (CH 3) = CH 2, F (CF 2) 8 CH 2 CH 2 OCOCH = CH 2, F (CF 2) 8 CH 2 CH 2 OCOC (CH _{3) = CH 2, H (} CF 2) 4 CH 2 OCOC (CH 3) = CH 2, H (CF 2) 4 CH 2 OCOCH = CH 2 , etc. fluoroalkyl or fluoroaryl-containing vinyl monomers and the like of 1 type or 2 types or more selected from these can be used in combination. However, the polymer B does not contain the epoxy group-containing vinyl monomer a1 as described above as a monomer component. Moreover, it is preferable that the polymer B does not contain the above fluoroalkyl group or fluoroaryl group containing vinyl monomer as a monomer component.

  The content of the polymerizable vinyl monomer b2 in the polymer B (value obtained by conversion based on the weight of the monomer used for polymer synthesis) is preferably 30 wt% or less, and is 20 wt% or less. Is more preferable. In addition, when the polymer B is a mixture of a plurality of types of compounds, the content of the polymerizable vinyl monomer b2 is a weighted average value (weighted average value based on the weight ratio) for these compounds. Can be adopted. Moreover, when the polymer B is a mixture of a plurality of types of compounds, it is preferable that the content of the polymerizable vinyl monomer b2 satisfies the above-described conditions for each compound.

As described above, the polymer B only needs to contain at least the alkoxysilyl group-containing vinyl monomer b1 as a monomer component, and monomers other than the alkoxysilyl group-containing vinyl monomer b1. Although it may contain a component, it is preferably a homopolymer of an alkoxysilyl group-containing vinyl monomer b1. That is, it is preferable that the polymer B does not contain any component other than the alkoxysilyl group-containing vinyl monomer b1 as a monomer component. Thereby, the dispersion stability of the colorant in the colored ink, the ejection stability of the colored ink, and the durability of the produced color filter can be made particularly excellent.
The ratio (content ratio) of the polymer B in the uncured resin material is not particularly limited, but is preferably 20 to 60 wt%, and more preferably 25 to 55 wt%. In addition, when the polymer B is a mixture of a plurality of types of compounds, the total content of these compounds is adopted as the content of the polymer B.

  The ratio of the content of the polymer A and the content of the polymer B is preferably 25:75 to 75:25, and more preferably 45:55 to 55:45, by weight. . By satisfying such conditions, the dispersion stability of the colorant in the colored ink and the discharge stability of the colored ink can be made particularly excellent. Further, in the produced color filter, it is possible to more surely prevent color unevenness and density unevenness at each part, and to make the uniformity of characteristics among individuals particularly excellent. Further, the durability of the color filter can be made particularly excellent.

[Polymer C]
The uncured resin material contains, in addition to the above components, a fluoroalkyl group or fluoroaryl group-containing vinyl monomer c1 represented by the following formula (2) as a monomer component. May be included.

Such a polymer C is preferably used together with the polymer A and the polymer B described above. Thereby, the discharge stability of the colored ink can be made particularly excellent. In particular, the liquid discharge from the nozzles of the droplet discharge head can be improved, and the colored ink can be more effectively prevented from sticking to the nozzles. Moreover, the heat resistance of the colored part to be formed can be made particularly excellent.
The polymer C may be substantially composed of a single compound, or may be a mixture of a plurality of types of compounds. However, when the polymer C is a mixture of a plurality of types of compounds, each compound contains at least a fluoroalkyl group- or fluoroaryl group-containing vinyl monomer c1 as a monomer component.

(Fluoroalkyl group or fluoroaryl group-containing vinyl monomer c1)
The polymer C contains at least a fluoroalkyl group- or fluoroaryl group-containing vinyl monomer c1 represented by the formula (2) as a monomer component. By containing such a fluoroalkyl group or fluoroaryl group-containing vinyl monomer c1 as a monomer component, the fluoroalkyl group or fluoroaryl group can be easily and reliably introduced into the polymer C. Further, by containing the fluoroalkyl group- or fluoroaryl group-containing vinyl monomer c1 as a monomer component, the discharge stability of the colored ink can be made particularly excellent. Moreover, the heat resistance of the colored part to be formed can be made particularly excellent. Further, when the polymer C contains a vinyl monomer c2 or the like as will be described later, the polymer can be synthesized suitably, and the polymer C having desired characteristics can be obtained easily and reliably. it can.

In the formula (2), examples of the alkyl group having 1 to 7 carbon atoms represented by R ⁵ include alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, pentyl, hexyl, and heptyl groups. However, a hydrogen atom or an alkyl group having 1 to 2 carbon atoms is preferable, and a hydrogen atom or a methyl group is more preferable. Thereby, the discharge stability of the colored ink and the heat resistance of the formed colored portion can be made particularly excellent.

  In the formula (2), as a typical example of the divalent hydrocarbon group represented by D (hydrocarbon group which may contain a hetero atom), a linear or branched alkylene group, more specifically, Examples include methylene, ethylene, propylene, tetramethylene, ethylethylene, pentamethylene, hexamethylene, oxymethylene, oxyethylene, and oxypropylene.

Specific examples of the monomer represented by the formula (2) include, for example, CF ₃ (CF ₂ ) ₃ CH ₂ CH═CH ₂ , CF ₃ (CF ₂ ) ₃ CH═CH ₂ , CF ₃ (CF ₂ ) ₅ CH ₂ CH═CH ₂ , CF ₃ (CF ₂ ) ₅ CH═CH ₂ , CF ₃ (CF ₂ ) ₇ CH═CH ₂ , CF ₃ (CF ₂ ) ₉ CH ₂ CH═CH ₂ , CF ₃ ( CF ₂ ) ₉ CH═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₂ CH ₂ CH═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₂ CH═CH ₂ , (CF ₃ ) ₂ CF ( _{CF 2) 4 CH 2 CH =} CH 2, (CF 3) 2 CF (CF 2) 4 CH = CH 2, (CF 3) 2 CF (CF 2) 6 CH 2 CH = CH 2, (CF 3) 2 _{CF (CF 2) 6 CH =} CH 2, F 5 C 6 CH = C _{2, CF 3 (CF 2)} 5 CH 2 CH 2 OCH 2 CH = CH 2, CF 3 (CF 2) 5 CH 2 CH 2 CH 2 OCH 2 CH = CH 2, CF 3 (CF 2) 7 CH 2 CH ₂ OCH ₂ CH═CH ₂ , CF ₃ (CF ₂ ) ₇ CH ₂ CH ₂ CH ₂ OCH ₂ CH═CH ₂ , CF ₃ (CF ₂ ) ₉ CH ₂ CH ₂ OCH ₂ CH═CH ₂ , CF ₃ (CF _{2) 9 CH 2 CH 2 CH} 2 OCH 2 CH = CH 2, H (CF 2) 6 CH 2 OCH 2 CH = CH 2, H (CF 2) 8 CH 2 OCH 2 CH = CH 2, (CF 3) ₂ CF (CF ₂ ) ₂ CH ₂ CH ₂ OCOCH═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₂ CH ₂ CH ₂ OCOC (CH ₃ ) ═CH ₂ , (CF ₃ ) ₂ CF (CF _{2) 4 CH 2 CH 2 OCOCH} = CH 2, (CF 3) 2 CF (CF 2) 4 CH 2 CH 2 OCOC (CH 3) = CH 2, (CF 3) 2 CF (CF 2) 6 CH 2 CH ₂ OCOCH═CH ₂ , (CF ₃ ) ₂ CF (CF ₂ ) ₆ CH ₂ CH ₂ OCOC (CH ₃ ) ═CH ₂ , CF ₃ (CF ₂ ) ₅ CH ₂ CH ₂ OCOCH═CH ₂ , CF ₃ (CF _{2) 5 CH 2 CH 2 OCOC} (CH 3) = CH 2, CF 3 (CF 2) 7 CH 2 CH 2 OCOCH = CH 2, CF 3 (CF 2) 7 CH 2 CH 2 OCOC (CH 3) = CH _{2, CF 3 (CF 2)} 9 CH 2 CH 2 OCOCH = CH 2, CF 3 (CF 2) 9 CH 2 CH 2 OCOC (CH 3) = CH 2, H (CF 2) 6 C _{2 CH 2 OCOCH = CH 2,} H (CF 2) 8 CH 2 CH 2 OCOC (CH 3) = CH 2, F (CF 2) 8 CH 2 CH 2 OCOCH = CH 2, F (CF 2) 8 CH 2 CH ₂ OCOC (CH ₃ ) ═CH ₂ , H (CF ₂ ) ₄ CH ₂ OCOC (CH ₃ ) ═CH ₂ , H (CF ₂ ) ₄ CH ₂ OCOCH═CH _{2 and the} like are selected from these One kind or a combination of two or more kinds can be used.

  The content of the fluoroalkyl group- or fluoroaryl group-containing vinyl monomer c1 in the polymer C (value obtained by conversion based on the weight of the monomer used for the synthesis of the polymer) is 15 to 100 wt%. Is preferable, and it is more preferable that it is 18-100 wt%. When the content of the fluoroalkyl group or fluoroaryl group-containing vinyl monomer c1 in the polymer C is a value within the above range, the dispersion stability of the colorant in the colored ink, the ejection stability of the colored ink, and formation In particular, the heat resistance of the colored portion can be made excellent. Moreover, the compatibility with respect to the polymer A or the polymer B of the polymer C can be made especially excellent, and the transparency of the colored part formed can be made especially high. On the other hand, when the content of the fluoroalkyl group or fluoroaryl group-containing vinyl monomer c1 in the polymer C is less than the lower limit, the fluoroalkyl group or fluoroaryl group-containing vinyl monomer c1 as described above is used. There is a possibility that the effect due to containing is not sufficiently exhibited. When the polymer C is a mixture of a plurality of types of compounds, the value of the content of the fluoroalkyl group- or fluoroaryl group-containing vinyl monomer c1 is a weighted average value (weight ratio) for these compounds. Based weighted average). Further, when the polymer C is a mixture of a plurality of types of compounds, these compounds all contain the fluoroalkyl group- or fluoroaryl group-containing vinyl monomer c1 at the content as described above. Is preferred.

(Other polymerizable vinyl monomer c2)
The polymer C may contain a polymerizable vinyl monomer c2 other than the fluoroalkyl group or fluoroaryl group-containing vinyl monomer c1 as described above as a monomer component. As such a polymerizable vinyl monomer c2, a vinyl monomer copolymerizable with a fluoroalkyl group or fluoroaryl group-containing vinyl monomer c1 can be used. (Meth) acryloyl groups such as acryloyloxyethyl isocyanate (manufactured by Showa Denko KK, trade name “Karenz MOI”), 2-methacryloyloxyethyl isocyanate and the like are bonded to isocyanate groups via alkylene groups having 2 to 6 carbon atoms. Isocyanates or protective groups such as (meth) acryloyl isocyanate, 2- (0- [1′methylpropylideneamino] carboxyamino) ethyl methacrylate (manufactured by Showa Denko KK, trade name “Karenz MOI-BM”) A polymerizable vinyl monomer having a blocked isocyanate group protected with 2; -Hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, 2,3-dihydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 8-hydroxyoctyl (meta ) Monoesterified product of polyhydric alcohol and acrylic acid or methacrylic acid, such as acrylate, 4-hydroxymethylcyclohexyl (meth) acrylate, polyalkylene glycol mono (meth) acrylate, etc., the polyhydric alcohol and acrylic acid or methacrylic acid A compound obtained by ring-opening polymerization of ε-caprolactone to a monoester product of the above (such as Plaxel FA series and Plaxel FM series manufactured by Daicel Chemical Industries, Ltd.), ethylene oxide, and propylene oxide. Polymerizable vinyl monomers having hydroxyl groups such as polymerized compounds; methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, phenyl (meth) acrylate, cyclohexyl ( 1 to 12 carbon atoms such as (meth) acrylate, dicyclopentanyl (meth) acrylate, dicyclopentanyloxyethyl (meth) acrylate, isobornyl (meth) acrylate, benzyl (meth) acrylate, phenylethyl (meth) acrylate, etc. Examples include alkyl, aralkyl (meth) acrylate; vinyl aromatic compounds such as styrene and α-methylstyrene, and one or more selected from these can be used in combination. However, the polymer C does not contain the epoxy group-containing vinyl monomer a1 and the alkoxysilyl group-containing vinyl monomer b1 as described above as monomer components.

  The content of the polymerizable vinyl monomer c2 in the polymer C (value obtained by conversion based on the weight of the monomer used for polymer synthesis) is preferably 85 wt% or less, and is 82 wt% or less. More preferably. When the polymer C is a mixture of a plurality of types of compounds, the content of the polymerizable vinyl monomer c2 is a weighted average value (weighted average value based on weight ratio) for these compounds. Can be adopted. Further, when the polymer C is a mixture of a plurality of types of compounds, it is preferable that the content of the polymerizable vinyl monomer c2 satisfies the above conditions for each compound.

When the uncured resin material contains the polymer C, the ratio (content) of the polymer C in the uncured resin material is not particularly limited, but is preferably 1 to 20 wt%, More preferably, it is 15 wt%. In addition, when the polymer C is a mixture of a plurality of types of compounds, the total content of these compounds is adopted as the content of the polymer C.
When the uncured resin material contains the polymer C, the ratio of the content of the polymer A and the content of the polymer C is preferably 50:50 to 99: 1 by weight. 60:40 to 98: 2 is more preferable. By satisfying such conditions, the dispersion stability of the colorant in the colored ink and the discharge stability of the colored ink are made particularly excellent, and color unevenness and density unevenness at each part of the color filter are more effective. Therefore, the uniformity of the characteristics among individuals can be made particularly excellent, and the durability of the color filter can be made particularly excellent.

  The weight average molecular weight of the above polymers (polymer A, polymer B, polymer C) is preferably 1000 to 50000, more preferably 1200 to 10000, and more preferably 1500 to 5000. More preferably. Further, the dispersity (weight average molecular weight Mw / number average molecular weight Mn) of the above polymers (polymer A, polymer B, polymer C) is about 1 to 3 in all cases.

  The content of the uncured resin material in the colored ink is preferably 0.5 to 15 wt%, and more preferably 1 to 8 wt%. When the content of the curable resin material is within the above range, the color produced can be produced while the dispersion stability of the pigment in the colored ink and the discharge property of the colored ink from the droplet discharge head are particularly excellent. The durability of the filter can be made particularly excellent. Further, a sufficient color density can be secured in the manufactured color filter.

When a pigment is included as the colorant, the content of the uncured resin material with respect to 100 parts by weight of the colorant in the color ink is preferably 15 to 50 parts by weight, and preferably 19 to 42 parts by weight. More preferred. By satisfying such conditions, the dispersion stability of the pigment in the colored ink and the discharge stability of the colored ink are made particularly excellent, and the coloring property and contrast of the colored portion of the formed color filter are particularly excellent. Can be. Further, the adhesion of the colored portion to the substrate can be made particularly excellent.
In addition, the uncured resin material constituting the colored ink may include a polymer other than the polymer A, the polymer B, and the polymer C described above.
In addition, the colored inks constituting the color filter ink set may have the same or different conditions such as the type and content of the resin material.

<Colorant>
The color filter has different colored portions (generally, three colors corresponding to RGB). And each colored ink which comprises the ink set for color filters contains the coloring agent according to the color tone of the coloring part which should be formed, respectively.
As the colorant, various organic pigments, various inorganic pigments, and various dyes can be used, and organic pigments are preferable. By using an organic pigment, for example, the color developability of a colored portion formed using a colored ink can be made particularly excellent. Examples of organic pigments include compounds classified as Pigments in the Color Index (CI; issued by The Society of Dyers and Colorists), specifically, the following Color Index (CI) numbers: Can be mentioned. More specifically, examples of the organic pigment include C.I. I. Pigment Yellow 1, 3, 12, 13, 14, 15, 16, 17, 20, 24, 31, 34, 35, 35: 1, 37, 37: 1, 42, 43, 53, 55, 60, 61, 65, 71, 73, 74, 81, 83, 93, 94, 95, 97, 98, 100, 101, 104, 106, 108, 109, 110, 113, 114, 116, 117, 119, 120, 126, 127, 128, 129, 138, 139, 150, 151, 152, 153, 154, 155, 156, 157, 166, 168, 175, 180, 184, 185; I. Pigment Orange 1, 5, 13, 14, 16, 17, 20, 20: 1, 24, 34, 36, 38, 40, 43, 46, 49, 51, 61, 63, 64, 71, 73, 104; C. I. Pigment violet 1, 3, 14, 16, 19, 23, 29, 32, 36, 38, 50; C.I. I. Pigment Red 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 21, 21, 22, 23, 30, 31, 32, 37, 38, 40, 41, 42, 48: 1, 48: 2, 48: 3, 48: 4, 49: 1, 49: 2, 50: 1, 52: 1, 53: 1, 57, 57: 1, 57: 2, 58: 2, 58: 4, 60: 1, 63: 1, 63: 2, 64: 1, 81, 81: 1, 83, 88, 90: 1, 97, 101, 102, 104, 105, 106, 108, 108: 1, 112, 113, 114, 122, 123, 144, 146, 149, 150, 151, 166, 168, 170, 171, 172, 174, 175, 176, 177, 178, 179, 180, 185, 187, 188, 190, 193 194,202,206,207,208,209,215,216,220,224,226,242,243,245,254,255,264,265; C. I. Pigment blue 1,15,15: 1,15: 2,15: 3,15: 4,15: 6, 17: 1,18,60,27,28,29,35,36,60,80; I. Pigment Green 7, 36, 15, 17, 18, 19, 26, 50, 58; I. Pigment Brown 7, 11, 23, 25, 33; I. Pigment Black 1 and 7 and derivatives thereof may be used, and one or more selected from these may be used in combination.

In particular, a colored 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 coloring property of the colored ink (red colored ink) can be made particularly excellent. In addition, the effect of using in combination with a dispersant and a resin material, which will be described in detail later, is more prominent, and the long-term dispersion stability of the pigment particles in the colored ink and the discharge stability of the colored ink are particularly excellent. can do.
C. I. Pigment Red 177 derivatives, C.I. I. When the pigment red 254 derivative contains a compound (derivative) represented by the following formula (4) or the following formula (5), the above-described effects are more remarkably exhibited.

  In particular, the colored ink contains C.I. as a pigment (green pigment). I. When it contains CI Pigment Green 58 (brominated zinc phthalocyanine pigment), the coloring property of the colored ink (green colored ink) can be made particularly excellent. In addition, C.I. I. Although Pigment Green 58 has a feature of excellent lightness, it has been a material that has been extremely difficult to stably disperse in the past. However, in the present invention, it can be stably dispersed in the past. Was extremely difficult. I. Even when the pigment green 58 is included, the long-term dispersion stability in the colored ink can be made particularly excellent. Further, the colored ink is C.I. I. When pigment green 58 is included, it is preferable to further include a sulfonated pigment derivative as a sub-pigment. Thereby, the coloring property of the colored ink can be further improved, and the discharge stability of the colored ink can be particularly improved.

  As a pigment, C.I. I. When the pigment green 58 and the sulfonated pigment derivative are included, the sulfonated pigment derivative preferably contains a compound (derivative) represented by the following formula (6). As a result, the effects of the present invention are more remarkably exhibited, and the long-term dispersion stability of the pigment particles in the colored ink and the discharge stability of the droplets can be made particularly excellent. Therefore, an image with a better contrast can be displayed. Further, in the method described later, the efficiency of the fine dispersion step can be made particularly excellent, and the colored ink can be produced in a short time and with relatively small energy. Productivity can be made particularly excellent, and it can also contribute to reduction of production costs.

In this way, a pigment derivative (sub-pigment) having a specific chemical structure is converted into C.I. I. By using together with Pigment Green 58 (main pigment), the above-described excellent effect is obtained as a result of intensive studies by the present inventors, and details of the mechanism are unknown. However, it is thought that this is due to the following reasons.
C. I. The brominated phthalocyanine constituting the pigment green 58 has a highly conjugated system as a whole molecule, and has a planar structure, which is stable in terms of energy. The brominated phthalocyanine is placed in a stable state in which the conjugated π electrons between the molecules overlap each other by arranging (parallel) the planar molecules. For this reason, C.I. I. Pigment Green 58 inherently easily aggregates and is difficult to stably disperse in a solvent.

  On the other hand, in the pigment derivative as described above, the hydrogen atom bonded to the nitrogen atom in the formula (6) forms a hydrogen bond with the oxygen atom constituting the phthalimide structure. For this reason, the hydrogen atom bonded to the nitrogen atom in formula (6) is substantially bonded to the oxygen atom constituting the phthalimide structure together with the nitrogen atom constituting the quinoline structure. In the pigment derivative (sulfonated pigment derivative) as described above, a stable ring structure (7-membered ring structure) with 7 atoms numbered 1 to 7 in the formula (6) is formed. By forming such a seven-membered ring structure, the plane due to the quinoline structure and the plane due to the phthalimide structure are in a non-parallel state.

  In this way, the plane due to the quinoline structure and the plane due to the phthalimide structure are non-parallel, so that C.I. I. A pigment derivative (sulfonated pigment derivative) having an appropriate affinity for CI Pigment Green 58 (brominated phthalocyanine) is disclosed in C.I. I. Pigment Green 58 enters between the molecules, and as described above, C. I. It is possible to make the pigment green 58 difficult to aggregate. Furthermore, since the pigment derivative (sulfonated pigment derivative) as described above has a sulfo group in the molecule, it has excellent dispersibility in a solvent described later. The above is considered to act synergistically and to obtain the above excellent effects.

  C. I. When pigment green 58 and the above pigment derivative (sulfonated pigment derivative) are included, the content of the pigment derivative (sulfonated pigment derivative) in the colored ink is not particularly limited. I. Pigment Green 58 (main pigment): It is preferably 2 to 32 parts by weight, more preferably 7 to 28 parts by weight with respect to 100 parts by weight. As a result, the long-term dispersion stability of the pigment particles in the colored ink and the ejection stability of the droplets can be made particularly excellent, and the contrast and brightness of the color filter produced using the colored ink are particularly excellent. Can be.

  In particular, the colored ink may be C.I. I. Pigment blue 15: 6 or C.I. I. When the pigment blue 15 derivative is included, the coloring property of the colored ink (blue colored ink) can be made particularly excellent. Further, the long-term dispersion stability of the pigment particles in the colored ink and the discharge stability of the colored ink can be made particularly excellent.

  The content of the colorant in the colored ink is preferably 3 to 25 wt% or more, more preferably 3.5 to 20 wt%, and even more preferably 4.0 to 9.4 wt%. When the content of the colorant is a value within the above range, a higher color density can be secured in a color filter manufactured using a colored ink, and the color filter can be used for clearer image display. Further, it is possible to reduce the amount of colored ink required for forming a colored portion having a predetermined color density, which is advantageous from the viewpoint of resource saving. Moreover, since the volatilization amount of the solvent when forming the colored portion of the color filter can be suppressed, the burden on the environment can be reduced. Conventionally, when the colorant is contained at a relatively high concentration as described above, the ejection stability is particularly low, and when ejecting droplets of colored ink, flight bending or droplet ejection amount is reduced. Problems such as destabilization were particularly likely to occur. Also, in the past, particularly when a colored portion is formed by discharging droplets on a large substrate (for example, G5 or more), the occurrence of defective products due to variations in the discharge amount at each site in the surface becomes significant. There is a problem that the productivity of the color filter is remarkably lowered. On the other hand, in the present invention, even when a colorant is contained at a relatively high concentration, as described in detail later, the occurrence of the above problems can be surely prevented, and the produced color It is possible to reliably prevent color unevenness, density unevenness, and the like from occurring in each part of the filter, and variations in characteristics among individuals, and a color filter can be manufactured with excellent productivity. That is, when the colored ink contains a relatively high concentration of the colorant as described above, the effects of the present invention are more remarkably exhibited. In addition, the durability of the manufactured color filter can be made particularly excellent.

  The average particle diameter of the pigment particles (colorant particles) in the colored ink is not particularly limited, but is preferably 10 to 200 nm, and more preferably 20 to 180 nm. Thereby, while making the light filter of the color filter manufactured using the colored ink sufficiently excellent, the dispersion stability of the pigment in the colored ink, the contrast in the color filter, etc. are particularly excellent. it can.

<Solvent>
In addition to the above components, the colored ink may contain a solvent.
The solvent functions as a dispersion medium for dispersing the colorant in the colored ink. Further, in the method for producing a colored ink as described later, the solvent usually functions as a solvent for dissolving the resin material as described above in the dispersion. Usually, most of the solvent (dispersion medium) constituting the colored ink is removed in the process of producing the color filter.

  As the solvent, for example, ester compounds, ether compounds, hydroxy ketones, carbonic acid diesters, cyclic amide compounds and the like can be used. Among them, [1] polyhydric alcohols (for example, ethylene glycol, propylene glycol, butylene glycol, glycerin, etc.) ) Ethers (polyhydric alcohol ethers), polyhydric alcohols or alkyl ethers of polyhydric alcohol ethers (eg methyl ether, ethyl ether, butyl ether, hexyl ether, etc.), esters (eg, formate, acetate, Propionate etc.), [2] ester of polyvalent carboxylic acid (eg succinic acid, glutaric acid etc.) (eg methyl ester etc.), [3] having at least one hydroxyl group and at least one carboxyl group in the molecule You Ether compounds (hydroxy acid), esters and the like, (4) polyhydric alcohol and carbonic acid diester having a chemical structure as obtained in the reaction with phosgene is preferred. Examples of the compound that can be used as the solvent 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 Cole 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-methoxybutyl acetate, diethylene glycol diethyl ether, octane Ethyl acid, ethylene glycol monobutyl ether acetate, ethylene glycol monobutyl ether, cyclohexyl acetate, diethyl succinate, ethylene glycol diacetate, propylene glycol diacetate, 4-hydroxy-4-methyl-2-pentanone, 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, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, ethylene glycol 2-ethylhexyl ether, Ethylene glycol monoethyl ether, diethylene glycol monohexyl ether, triethylene glycol monobutyl ether, diethylene glycol mono-2-ethylhexyl ether, tripropylene glycol mono n-butyl ether, butyl cellosolve acetate, and the like, one or two selected from these A combination of the above can be used. Among these, the solvent includes one or more selected from the group consisting of 1,3-butylene glycol diacetate, bis (2-butoxyethyl) ether, and diethylene glycol monobutyl ether acetate. preferable. Among these, the liquid medium includes one or more selected from the group consisting of 1,3-butylene glycol diacetate, bis (2-butoxyethyl) ether, and diethylene glycol monobutyl ether acetate. Is preferred. As a result, the discharge stability of the colored ink droplets can be made particularly excellent, and color unevenness, density unevenness, etc. at each part of the manufactured color filter can be more effectively suppressed. The uniformity of characteristics among individuals can be made particularly excellent. Further, when the colored ink contains a pigment as a colorant, the long-term dispersion stability of the pigment particles in the colored ink can be made particularly excellent. Even when the pigment content in the colored ink is increased, the long-term dispersion stability of the pigment can be sufficiently improved. Further, when the solvent is composed of the above compound, the discharge stability of the colored ink can be made particularly excellent, and the dispersion stability of the pigment particles in the colored ink is particularly excellent. The long-term storage stability of the colored ink can be made particularly excellent. Further, when the solvent is composed of the above compound, in the method for producing a color filter as described later, the colored ink can be reliably spread throughout the cell, and the solvent Even if the removal condition is not strictly defined, a flattened colored portion can be easily formed. In other words, it is easy to control the shape of the pixel during baking.

The boiling point of the solvent under atmospheric pressure (1 atm) is preferably 160 to 300 ° C, more preferably 180 to 290 ° C, and further preferably 200 to 280 ° C. When the boiling point of the solvent under atmospheric pressure is a value within the above range, clogging or the like in the droplet discharge head for discharging the colored ink can be more effectively prevented, and the productivity of the color filter is particularly excellent. Can be.
The vapor pressure of the solvent at 25 ° C. is preferably 0.7 mmHg or less, and more preferably 0.1 mmHg or less. When the vapor pressure of the solvent is within the above range, the clogging or the like in the droplet discharge head for discharging the colored ink can be more effectively prevented, and the productivity of the color filter is particularly excellent. be able to.

  The content of the solvent in the colored ink is preferably 50 to 98 wt%, more preferably 70 to 95 wt%, and still more preferably 80 to 93 wt%. When the content of the solvent is within the above range, it is possible to improve the durability of the produced color filter while making the discharge property of the colored ink from the droplet discharge head particularly excellent. . Further, a sufficient color density can be secured in the manufactured color filter.

<Dispersant>
Further, the coloring ink may contain a dispersant. Thereby, for example, when the colored ink contains a pigment as a colorant, the dispersibility and dispersion stability of the pigment in the colored ink can be made particularly excellent. In addition, by using a dispersant, in the fine dispersion step of the production method as described later, the surface of pigment particles (relatively large pigment particles that are not finely dispersed) added to the dispersant dispersion is used. The dispersing agent adheres (adsorbs), and the dispersibility of the pigment particles (pigment particles not relatively finely dispersed and having a relatively large particle size) in the dispersing agent dispersion can be improved. As a result, the fine dispersion process in the fine dispersion step can be efficiently performed, the productivity of the colored ink can be made particularly excellent, and the pigment particles (finely dispersed in the finally obtained colored ink can be obtained. The long-term dispersion stability of the pigment fine particles) can be made particularly excellent. Further, the brightness and contrast of the produced color filter can be made particularly excellent.

  Although it does not specifically limit as a dispersing agent, For example, a polymeric dispersing agent can be used. Examples of the polymer dispersant include basic polymer dispersants, neutral polymer dispersants, acidic polymer dispersants, and the like. Examples of such polymeric dispersants include, for example, dispersants made of acrylic and modified acrylic copolymers, urethane dispersants, polyaminoamide salts, polyether esters, phosphate esters, and aliphatic polycarboxylic acids. And the like, and the like.

  More specific examples of the dispersant include, for example, Dispersic 101, Dispersic 102, Dispersic 103, Dispersic P104, Dispersic P104S, Dispersic 220S, Dispersic 106, Dispersic 108, Dispersic 109, Disperse BIC 110, DISPERBIC 111, DISPERBIC 112, DISPERBIC 116, DISPERBIC 140, DISPERBIC 142, DISPERBIC 160, DISPERBIC 161, DISPERBIC 162, DISPERBIC 163, DISPERBIC 164, DISPERBIC 166, DISPERBIC 167 Dispersic 168, Dispersic 170, Dispersic 171, Dispersic 1 4, Dispersic 180, Dispersic 182, Dispersic 183, Dispersic 184, Dispersic 185, Dispersic 2000, Dispersic 2001, Dispersic 2050, Dispersic 2070, Dispersic 2095, Dispersic 2150, Dispersic LPN6919, Dispersic 9075, Dispersic 9077 (above, manufactured by BYK Chemie); EFKA 4008, EFKA 4009, EFKA 4010, EFKA 4015, EFKA 4020, EFKA 4046, EFKA 4047, EFKA 4050, EFKA 4055, EFKA 4055, EFKA 4055 , EFKA 4401, EFKA 4402, EF A 4403, EFKA 4406, EFKA 4408, EFKA 4300, EFKA 4330, EFKA 4340, EFKA 4015, EFKA 4800, EFKA 5010, EFKA 5065, EFKA 5066, EFKA 5070, EFKA 5070, EFKA 5070 Sol Sparse 3000, Sol Sparse 9000, Sol Sparse 13000, Sol Sparse 16000, Sol Sparse 17000, Sol Sparse 18000, Sol Sparse 20000, Sol Sparse 21000, Sol Sparse 24000, Sol Sparse 26000, Sol Sparse 27000, Sol Sparse 28000, Sol Sparse 32000, Sol Sparse 32500, Sol Sparse 32550, Sol Sparse 33500, Solsperse 35100, Solsperse 35200, Solsperse 36000, Solsperse 36600, Solsperse 38500, Solsperse 41000, Solsperse 41090, Solsperse 20000 (above, manufactured by Lubrizol); Manufactured by Ajinomoto Fine Techno Co., Ltd.); Disparon 1850, Disparon 1860, Disparon 2150, Disparon 7004, Disparon DA-100, Disparon DA-234, Disparon DA-325, Disparon DA-375, Disparon DA-705, Disparon DA-725, Disparon PW-36 (above, manufactured by Enomoto Kasei Co., Ltd.) And Florene DOPA-14, Florene DOPA-15B, Floren DOPA-17, Floren DOPA-22, Floren DOPA-44, Floren TG-710, Floren D-90 (manufactured by Kyoei Chemical Co., Ltd.), Anti-Terra-205 (Made by Big Chemie) etc. are mentioned, It can use combining 1 type (s) or 2 or more types selected from these.

  In particular, in the present invention, as the dispersant, a dispersant having a predetermined acid value (hereinafter also referred to as an acid value dispersant) and a dispersant having a predetermined amine value (hereinafter also referred to as an amine value dispersant) It is preferable to use together. As a result, the effect of the acid value dispersant that exhibits the viscosity reducing effect that lowers the viscosity of the colored ink and the effect of the amine value dispersant that stabilizes the viscosity of the color filter ink (first ink) are compatible. The dispersion stability of the pigment in the colored ink can be made particularly excellent. In particular, the method described below is a dispersion of a dispersant in which a dispersant is dispersed in a solvent by stirring a mixture containing a dispersant, a thermoplastic resin and a solvent prior to the fine dispersion treatment of the pigment. In such a method, a combination of an acid value dispersant and an amine value dispersant is used in combination with the dispersant (an acid value dispersant and an amine value dispersant). ) Can be reliably prevented, and the dispersion stability of the pigment as described above can be made particularly excellent.

  Specific examples of the acid value dispersant include Dispersic P104, Dispersic P104S, Dispersic 220S, Dispersic 110, Dispersic 111, Dispersic 170, Dispersic 171, Dispersic 174, Dispersic 2095 (above, BYC Chemie) EFKA 5010, EFKA 5065, EFKA 5066, EFKA 5070, EFKA 7500, EFKA 7554 (above, manufactured by Ciba Specialty); Solsperse 3000, Solsperse 16000, Solsperse 17000, Solsperse 18000, Solsperse 36000, Solsperse 36000, (Above, manufactured by Lubrizol).

  Specific examples of the amine value dispersant include Dispersic 102, Dispersic 160, Dispersic 161, Dispersic 162, Dispersic 163, Dispersic 164, Dispersic 166, Dispersic 167, Dispersic 168, Dispersic 2150, Dispersic LPN6919, Dispersic 9075, Dispersic 9077 (above, manufactured by BYK Chemie); EFKA 4015, EFKA 4020, EFKA 4046, EFKA 4047, EFKA 4050, EFKA 4055, EFKA 4060, EFKA 4060, EFKA 4060, EFKA 4060, , EFKA 4340, EFKA 4400, EFKA 4401, EFKA 4402, EFK A4403, EFKA 4800 (manufactured by Ciba Specialty Company); Azisper PB711 (manufactured by Ajinomoto Fine-Techno Company); Anti-Terra-205 (manufactured by Big Chemie Company) and the like.

When an acid value dispersant and an amine value dispersant are used in combination, the acid value of the acid value dispersant (acid value when converted to solid content) is not particularly limited, but is preferably 5 to 370 KOHmg / g. It is more preferably 20 to 270 KOH mg / g, and further preferably 30 to 135 KOH mg / g. When the acid value of the acid value dispersant is within the above range, the dispersion stability of the pigment when used in combination with the amine value dispersant can be made particularly excellent. The acid value of the dispersant can be determined by a method based on DIN EN ISO 2114, for example.
Moreover, it is preferable that the acid value dispersant does not have a predetermined amine value, that is, the amine value is zero.

When the amine value dispersant and the acid value dispersant are used in combination, the amine value of the amine value dispersant (amine value in terms of solid content) is not particularly limited, but is preferably 5 to 200 KOHmg / g. It is more preferably 25 to 170 KOH mg / g, and further preferably 30 to 130 KOH mg / g. When the amine value of the amine value dispersant is a value within the above range, the dispersion stability of the pigment when used in combination with the acid value dispersant can be made particularly excellent. In 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 colored ink is X _A [wt%], and the content of the amine value dispersant in the colored ink is X _B. When [wt%] is satisfied, it is preferable to satisfy the relationship of 0.1 ≦ X _A / X _B ≦ 1, and more preferable to satisfy the relationship of 0.15 ≦ X _A / X _B ≦ 0.5. . By satisfying such a relationship, the synergistic effect by using the acid value dispersant and the amine value dispersant in combination is more prominent, and the pigment dispersion stability, droplet ejection stability, etc. are particularly excellent. Can be.

The acid value of the acid value dispersant is AV [KOH mg / g], the amine value of the amine value dispersant is BV [KOH mg / g], the content of the acid value dispersant is X _A [wt%], and the amine When the content of the valent dispersant is X _B [wt%], it is preferable that the relationship of 0.01 ≦ (AV × X _A ) / (BV × X _B ) ≦ 1.9 is satisfied, and 0.10 More preferably, the relationship of ≦ (AV × X _A ) / (BV × X _B ) ≦ 0.95 is satisfied. By satisfying such a relationship, the synergistic effect by using the acid value dispersant and the amine value dispersant in combination is more prominent, and the pigment dispersion stability, droplet ejection stability, etc. are particularly excellent. Can be.
The content of the dispersant in the colored ink is not particularly limited, but is preferably 2.5 to 10.2 wt%, and more preferably 3.2 to 9.2 wt%.

<Other ingredients>
The colored ink may contain components other than those described above. Examples of such components include adhesion improvers; 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 -Mercaptopropyltrime Adhesion promoters such as xylsilane; antioxidants such as 2,2-thiobis (4-methyl-6-t-butylphenol), 2,6-di-t-butylphenol; 2- (3-t-butyl-5- UV absorbers such as methyl-2-hydroxyphenyl) -5-chlorobenzotriazole and alkoxybenzophenone; anti-aggregation agents such as sodium polyacrylate.

  The colored ink may contain a thermoplastic resin in addition to the uncured resin material. Thereby, for example, when a pigment is included as a colorant, the dispersibility of the pigment particles in the colored ink can be made particularly excellent. In particular, in the production method as described later, by using a thermoplastic resin in the preliminary dispersion step, the dispersion stability of the pigment particles in the colored ink can be made extremely excellent.

Examples of the thermoplastic resin include alginic acids, polyvinyl alcohol, hydroxypropyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose, styrene-acrylic acid resin, styrene-acrylic acid-acrylic ester resin, styrene-maleic acid resin, styrene- Maleic acid half ester resin, methacrylic acid-methacrylic acid ester resin, acrylic acid-acrylic acid ester resin, isobutylene-maleic acid resin, rosin-modified maleic acid resin, polyvinylpyrrolidone, gum arabic starch, polyallylamine, polyvinylamine, polyethyleneimine, etc. 1 type or 2 types or more selected from these can be used in combination.
The content of the thermoplastic resin in the colored ink is not particularly limited, but is preferably 1.5 to 7.7 wt%, and more preferably 2.1 to 7.2 wt%.

  The viscosity at 25 ° C. of the colored ink constituting the color filter ink set (viscosity (kinematic viscosity) measured using an E-type viscometer) is preferably 13 mPa · s or less, and preferably 12 mPa · s or less. Is more preferably 5 to 11 mPa · s. Thereby, the discharge stability of the colored ink is further improved, and the productivity of the color filter can be particularly improved. In addition, it is possible to effectively prevent the coloring ink and the curing ink described later from being easily mixed and effectively prevent the colorant concentration from being unintentionally varied in the formed colored portion. Can do. The viscosity (kinematic viscosity) of the colored ink can be measured using, for example, an E-type viscometer (for example, RE-01 manufactured by Toki Sangyo Co., Ltd.), and particularly according to JIS Z8809. Can do. In this specification, unless otherwise specified, “viscosity” refers to a value obtained by measurement as described above.

[Curing ink]
The curable ink constituting the color filter ink set includes a curing agent that accelerates the curing reaction of the uncured resin material as described above.
<Curing agent>
The curing agent contained in the curable ink is appropriately selected depending on the type of uncured resin material contained in the colored ink, and for example, a crosslinking agent, a thermal acid generator, a photoacid generator, or the like can be used. .

Examples of the crosslinking agent include amine compounds, phenolic compounds, polycarboxylic acid anhydrides, polycarboxylic acids, polyfunctional epoxy monomers, polyfunctional acrylic monomers, polyfunctional vinyl ether monomers, polyfunctional oxetane monomers, and the like. Can be used.
Specific examples of amine compounds include aliphatic polyamines such as ethylenediamine, propylenediamine, butylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, pentaethylenehexamine, and aromatics such as metaxylylenediamine, diaminodiphenylmethane, and phenylenediamine. Alicyclic polyamines such as aromatic polyamines, 1,3-bis (aminomethyl) cyclohexane, isophorone diamine, norbornane diamine, polyamide resins synthesized from dimers of dicyandiamide and linolenic acid and ethylene diamine, and the like. .

  Specific examples of phenolic compounds include phenol novolac resins, cresol novolac resins, aromatic hydrocarbon formaldehyde resin-modified phenol resins, dicyclopentadiene phenol addition resins, phenol aralkyl resins, naphthol aralkyl resins, trimethylol methane resins, tetraphenyl alcohols. Examples thereof include roll ethane resin, naphthol novolak resin, naphthol-phenol co-condensed novolak resin, naphthol-cresol co-condensed novolac resin, biphenyl-modified phenol resin, aminotriazine-modified phenol resin, and modified products thereof.

  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, dimethyltetrahydroanhydride Aliphatic or alicyclic dicarboxylic anhydrides such as phthalic acid, hymic anhydride, and nadic anhydride; Fats such as 1,2,3,4-butanetetracarboxylic dianhydride, cyclopentanetetracarboxylic dianhydride Aromatic polycarboxylic dianhydrides; aromatic polycarboxylic anhydrides such as pyromellitic anhydride, trimellitic anhydride, and benzophenone tetracarboxylic anhydride; ester groups such as ethylene glycol bistrimellitate and glycerin tristrimitate Examples thereof include acid anhydrides. Moreover, the epoxy resin hardening | curing agent which consists of a commercially available carboxylic acid anhydride can also be used suitably.

  Specific examples of the polycarboxylic acid include aliphatic polycarboxylic acids such as succinic acid, glutaric acid, adipic acid, butanetetracarboxylic acid, maleic acid and itaconic acid; hexahydrophthalic acid, 1,2-cyclohexane Aliphatic polycarboxylic acids such as dicarboxylic acid, 1,2,4-cyclohexanetricarboxylic acid and cyclopentanetetracarboxylic acid, and phthalic acid, isophthalic acid, terephthalic acid, pyromellitic acid, trimellitic acid, 1,4,5 , 8-Naphthalenetetracarboxylic acid, aromatic polyvalent carboxylic acid such as benzophenone tetracarboxylic acid.

Specific examples of the polyfunctional epoxy monomer include Daicel Chemical Industries, Ltd., trade name Celoxide 2021, Daicel Chemical Industries, 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, cyclohexanedimethanol divinyl ether, and triethylene. Examples include glycol divinyl ether, trimethylolpropane trivinyl ether, pentaerythritol tetravinyl ether, and the like.
Specific examples of the polyfunctional oxetane monomer include xylylene oxetane, biphenyl type oxetane, and novolak type oxetane.

The thermal acid generator is a component that generates an acid by heating. Specific examples thereof include diazonium salts, iodonium salts, sulfonium salts, phosphonium salts, selenium salts, oxonium salts, ammonium salts, benzothiazolium salts, and the like. Examples include onium salts. Among these, a sulfonium salt and a benzothiazolium salt are particularly preferable.
As more specific examples of thermal acid generators, as trade names, Sun-Aid SI-45, Same as left SI-47, Same as left SI-60, Same as left SI-60L, Same as left SI-80, Same as left SI-80L, Same as left SI- 100, same left SI-100L, same left SI-145, same left SI-150, same left SI-160, same left SI-110L, same left SI-180L (above, Sanshin Chemical Co., Ltd., product name), CI-2921, CI -2920, CI-2946, CI-3128, CI-2624, CI-2639, CI-2064 (Nippon Soda Co., Ltd., product name), CP-66, CP-77 (Asahi Denka Kogyo Co., Ltd. products) , Product name), FC-520 (product of 3M company, product name) and the like.

The photoacid generator is a component that generates an acid by light, and specific examples thereof include diazonium salts, iodonium salts, sulfonium salts, phosphonium salts, selenium salts, oxonium salts, ammonium salts, and the like. More specific examples of the photoacid generator include trade names such as Cyracure UVI-6970, Cyracure UVI-6974, Cyracure UVI-6990, Cyracure UVI-950 (trade name, manufactured by Union Carbide, USA), Irgacure. 261 (trade name, manufactured by Ciba Specialty Chemicals), SP-150, SP-151, SP-170, Optmer SP-171 (trade name, manufactured by Asahi Denka Kogyo Co., Ltd.), CG-24-61 ( Ciba Specialty Chemicals, trade name), DAICATII (Daicel Chemical Industries, trade name), UVAC1591 (Daicel UCB, trade name), CI-2064, CI-2638, CI- 2624, CI-2481, CI-2734, CI-2855, CI-28 3, CI-2758 (Nippon Soda Co., Ltd., product name), PI-2074 (Rhone-Poulenc, trade name, pentafluorophenylborate toluylcumyl iodonium salt), FFC509 (3M product, trade name), BBI-102, BBI-101, BBI-103, MPI-103, TPS-103, MDS-103, DTS-103, NAT-103, NDS-103 (made by Midori Chemical Co., Ltd., trade name), CD-1012 (USA) , Manufactured by Sartomer, trade name) and the like.
Among the compounds described above, amine compounds, polyvalent carboxylic acid anhydrides, and phenol compounds can be suitably used as curing agents for the epoxy resins as described above. Moreover, as a curing agent for the epoxy resin, a curing catalyst such as imidazole, BF ₃ -amine complex, guanidine derivative or the like can be used.

  The content of the curing agent as described above in the curable ink varies depending on the type and amount of the uncured resin material contained in the colored ink, but is preferably 1 to 50 wt%, and 2 to 30 wt%. It is more preferable that Thereby, the discharge stability of the curable ink can be made particularly excellent, and the curing reaction of the uncured resin material contained in the colored ink can be more effectively promoted. Also, the storage stability of the curable ink can be made particularly excellent.

  Further, when the amount of the uncured resin material contained in the colored ink ejected into one cell is 100 parts by weight, the amount of the curing agent contained in the curing ink ejected into one cell. Is preferably 5 to 50 parts by weight, and more preferably 10 to 40 parts by weight. Thereby, the curing reaction of the uncured resin material contained in the colored ink can be more effectively promoted. Further, the ejection stability of the curable ink can be made particularly excellent.

<Solvent>
Further, the curable ink may contain a solvent. Thereby, the discharge property of the curable ink can be improved. Moreover, the mixing property with the colored ink can be made higher, and it is possible to more effectively prevent the unintentional variation in the concentration of the colorant in the colored portion to be formed.
As the solvent used for the curable ink, those mentioned in the description of the colored ink described above can be used.

The solvent used for the curable ink is preferably the same type as the solvent used for the colored ink described above. Thereby, the mixing property with the colored ink ejected in the same cell can be made higher, color unevenness and density unevenness at the site can be more effectively prevented, and more uniform coloring can be achieved. The part can be formed.
The content of the solvent contained in the curable ink is preferably 30 to 95 wt%, and more preferably 40 to 90 wt%. Thereby, the ejection stability of the curable ink can be improved more effectively, and the mixing property with the colored ink can be made higher.

<Dispersant>
Further, the curable ink may contain a dispersant. Thereby, the mixing property with the colored ink is improved, and it is possible to more effectively prevent unintentional variation in the concentration of the colorant in the colored portion to be formed. Moreover, the ejection stability of the curable ink can be improved more effectively.
As the dispersant used in the curable ink, those mentioned in the description of the colored ink described above can be used.

Moreover, it is preferable to use the same kind of dispersing agent used for the curable ink as the dispersing agent used for the colored ink described above. Thereby, the mixing property with the colored ink discharged into the same cell can be made higher, and it is more effective to cause unintentional variation in the concentration of the colorant in the colored portion to be formed. Can be prevented.
The content of the dispersant contained in the curable ink is preferably 0.1 to 30 wt%, and more preferably 0.2 to 20 wt%. Thereby, the ejection stability of the curable ink can be improved more effectively, and the mixing property with the colored ink can be made higher.

  The viscosity at 25 ° C. (viscosity (kinematic viscosity) measured using an E-type viscometer) of the curing ink constituting the color filter ink set is preferably 8 mPa · s or less, and 6 mPa · s or less. More preferably, it is 2 to 6 mPa · s. Thereby, the discharge stability of the curable ink can be further improved, and the productivity of the color filter can be particularly improved. In addition, the curing ink and the colored ink described above are particularly easily mixed, and more effectively prevent unintentional variations in the concentration of the colorant in the colored portion to be formed. be able to.

≪Method for producing color filter ink (colored ink) ≫
Next, a preferred embodiment of the method for producing the color filter ink (colored ink) as described above will be described.
The manufacturing method of the present embodiment includes a preliminary dispersion step of obtaining a dispersion liquid in which a dispersant is dispersed in a solvent by stirring a mixture containing the dispersant, a thermoplastic resin, and a solvent, and a dispersant. A pigment (colorant) is added to the dispersion, and inorganic beads are added in multiple stages to carry out a fine dispersion treatment to obtain a pigment dispersion, and the pigment dispersion and the uncured resin material are mixed. And a cured resin mixing step.

<Preliminary dispersion process>
In the preliminary dispersion step, a dispersion containing a dispersant dispersed in a solvent is prepared by stirring a mixture containing the dispersant, the thermoplastic resin, and the solvent. Thereby, it can be set as the state which the association state of the dispersing agent was released.
As described above, in this embodiment, prior to the process of finely dispersing the pigment, which will be described in detail later, the mixture containing no pigment is predispersed, so that the pigment particles are finally dispersed uniformly and stably. A colored ink having particularly excellent stability can be obtained.

  In this step, by mixing the thermoplastic resin together with the dispersant and the solvent, pigment particles added to the dispersant dispersion in the fine dispersion step described later (relative particle size not finely dispersed). Dispersant and thermoplastic resin are attached to the surface of the large pigment particles), and the pigment particles (pigment particles having a relatively large particle size that are not finely dispersed) have excellent dispersibility in the dispersant dispersion. It can be. As a result, the fine dispersion process in the fine dispersion step can be efficiently performed, the productivity of the colored ink can be made particularly excellent, and the pigment particles (finely dispersed in the finally obtained colored ink can be obtained. The long-term dispersion stability of the fine pigment particles) and the discharge stability of the droplets can be made particularly excellent.

The content of the dispersant in the dispersant dispersion prepared in this step (when using a plurality of types of dispersants in combination) is not particularly limited, but is 10 to 40 wt%. Is preferable, and it is more preferable that it is 12-32 wt%. When the content of the dispersant is a value within the above range, the effects as described above are more remarkably exhibited.
Moreover, the content rate of the thermoplastic resin in the dispersing agent dispersion liquid prepared in this step is not particularly limited, but is preferably 6 to 30 wt%, more preferably 8 to 26 wt%. When the content of the thermoplastic resin is within the above range, the effects as described above are more remarkably exhibited.
Moreover, the content rate of the solvent in the dispersing agent dispersion liquid prepared at this process is although it does not specifically limit, It is preferable that it is 40-80 wt%, and it is more preferable that it is 53-75 wt%. When the content of the solvent is within the above range, the effects as described above are more remarkably exhibited.

In this step, a dispersant dispersion is obtained by stirring the mixture of the above components using various stirrers.
Examples of the stirrer that can be used in this step include a uniaxial or biaxial mixer such as a disper mill.
Although the stirring process 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. Thereby, while making the productivity of the colored ink sufficiently excellent, the association state of the dispersant can be solved more effectively, and the dispersion stability of the pigment particles in the finally obtained colored ink, the colored ink The discharge stability can be made particularly excellent.

  Moreover, the rotation speed of the stirring blade which the stirrer has in this step is not particularly limited, but is preferably 500 to 4000 rpm, and more preferably 800 to 3000 rpm. Thereby, while making the productivity of the colored ink sufficiently excellent, the association state of the dispersant can be solved more effectively, and the dispersion stability of the pigment particles in the finally obtained colored ink is particularly excellent. Can be. In addition, deterioration, modification, and the like due to heat or the like of a thermoplastic resin or the like can be reliably prevented.

<Fine dispersion process>
Next, the above-described pigment is added to the dispersant dispersion obtained in the above step, and inorganic beads are added in multiple stages to perform fine dispersion treatment (fine dispersion step).
Thus, in this embodiment, prior to adding the pigment, the preliminary dispersion step as described above is provided, and the inorganic beads are added in multiple stages in the step of finely dispersing the pigment (fine dispersion step). By adding inorganic beads in multiple stages in the fine dispersion step, the efficiency of pigment atomization can be improved, and the pigment particles in the finally obtained colored ink should be sufficiently small. Can do. In particular, by using a halogenated phthalocyanine zinc complex (main pigment) and a sulfonated pigment derivative (sub-pigment) in combination as described above, and using a method having a preliminary dispersion step and a multi-stage fine dispersion step. The effect of these effects synergistically, and the resulting colored ink has excellent pigment dispersion stability and droplet ejection stability, and has excellent brightness and contrast. It can be used for the production of color filters.

  On the other hand, if the fine dispersion step is not performed in multiple stages, it becomes difficult to make the pigment particles in the finally obtained colored ink sufficiently small, or the productivity of the colored ink is significantly reduced. there's a possibility that. Even if the fine dispersion step is performed in multiple stages, the following problems may occur if the preliminary dispersion step as described above is omitted. That is, when the preliminary dispersion step is omitted, when the pigment is added, since the association state of the dispersant is not sufficiently undissolved (not loosened), in the fine dispersion step, the dispersant is applied to the surface of the pigment particles. It becomes difficult to uniformly attach the thermoplastic resin. In addition, it is difficult to make the dispersibility of the pigment particles in the fine dispersion step (pigment particles that are not finely dispersed and have a relatively large particle size) sufficiently excellent in the solvent.

  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 productivity of the colored ink can be made particularly excellent while sufficiently improving the long-term dispersion stability of the pigment particles in the finally obtained colored ink.

In the following description, the method of adding the inorganic beads in two stages, that is, the first treatment using the first inorganic beads and the second treatment using the second inorganic beads in the fine dispersion step. The method of performing will be described representatively.
The inorganic beads (first inorganic beads, second inorganic beads) used in this step may be composed of any material as long as they are composed 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 (main pigment and sub-pigment) is added to the dispersant dispersion prepared in the above-described preliminary dispersion step, and first finely dispersed using first inorganic beads having a predetermined particle diameter. Perform the process.
The first inorganic beads used in the first treatment are preferably those having a larger particle size 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 diameter 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, the efficiency of atomization (small particle size) of the pigment particles in the first treatment is remarkably depending on the type of pigment and the like. A tendency to decline appears. 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 the atomization (small particle size) of the pigment particles in the second treatment is lowered, and the efficiency of the atomization (fine dispersion) of the pigment as the entire fine dispersion process is lowered.

The amount of the first inorganic beads used is not particularly limited, but is preferably 100 to 600 parts by weight and more preferably 200 to 500 parts by weight with respect to 100 parts by weight of the dispersant dispersion.
The amount of the pigment added to the dispersant dispersion is not particularly limited, but is preferably 12 parts by weight or more, and more preferably 18 to 35 parts by weight with respect to 100 parts by weight of the dispersant dispersion.

The first treatment can be performed by stirring using various stirrers in a state where the pigment and the first inorganic beads are added to the dispersant dispersion.
Examples of the stirrer that can be used in the first treatment include a media-type disperser such as a pearl mill, a uniaxial or biaxial mixer such as a disper mill, and the like.
The stirring process time using the stirrer (the processing time of the first process) is not particularly limited, but is preferably 10 to 120 minutes, and more preferably 15 to 40 minutes. Thereby, the atomization (fine dispersion) of the pigment can proceed efficiently without reducing the productivity of the colored ink.

  Moreover, the rotation speed of the stirring blade which the stirrer has in the first treatment is not particularly limited, but is preferably 1000 to 5000 rpm, and more preferably 1200 to 3800 rpm. Thereby, the atomization (fine dispersion) of the pigment can proceed more efficiently without reducing the productivity of the colored ink. In addition, deterioration, modification, and the like due to heat or the like of a thermoplastic resin or the like 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 colored ink can be sufficiently atomized (finely dispersed), and the dispersion stability of pigment particles in the colored ink over a long period of time (long-term dispersion stability). In particular, the droplet discharge stability can be particularly improved.

The average particle size 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 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 or the like. A tendency to decline appears. 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 100 weight part of dispersing agent dispersion liquid, and it is more preferable that it is 200-500 weight part.

The second treatment can be performed using various stirrers.
Examples of the stirrer that can be used in the second treatment include a media type disperser such as a pearl mill, a uniaxial or biaxial mixer such as a disper mill, and the like.
The stirring time using the stirrer (second processing time) is not particularly limited, but is preferably 10 to 120 minutes, and more preferably 15 to 40 minutes. Thereby, the atomization (fine dispersion) of the pigment can be sufficiently advanced without reducing the productivity of the colored ink.

  Moreover, the rotation speed of the stirring blade which the stirrer in the second treatment has is not particularly limited, but is preferably 1000 to 5000 rpm, and more preferably 1200 to 3800 rpm. Thereby, the atomization (fine dispersion) of the pigment can proceed more efficiently without reducing the productivity of the colored ink. In addition, deterioration, modification, and the like due to heat or the like of a thermoplastic resin or the like can be reliably prevented.

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 diameter 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. It is preferably smaller than the average particle size. 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 colored ink can be made smaller. Can be.
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.

<Uncured resin mixing process>
The pigment dispersion obtained in the fine dispersion step as described above is mixed with an uncured resin material (uncured resin mixing step). Thereby, a colored ink is obtained.
This step is preferably performed in a state where the second inorganic beads used in the second treatment are removed. The removal of the second inorganic beads can be easily and reliably performed by a method such as filtration.

This step can be performed using various stirrers.
Examples of the stirrer that can be used in this step include a uniaxial or biaxial mixer such as a disper mill.
The stirring time using the stirrer (processing time in this step) is not particularly limited, but is preferably 1 to 60 minutes, more preferably 15 to 40 minutes.
Moreover, the rotation speed of the stirring blade which the stirrer has in this step is not particularly limited, but is preferably 1000 to 5000 rpm, and more preferably 1200 to 3800 rpm.
In this step, a liquid having a composition different from that of the solvent used in the step may be added. This makes it possible to reliably obtain a colored ink having desired characteristics while suitably dispersing the dispersant in the preliminary dispersion step and finely dispersing the pigment particles in the fine dispersion step.

  In this step, at least a part of the solvent used in the above step is removed prior to mixing the pigment dispersion and the curable resin material or after mixing the pigment dispersion and the curable resin material. May be. Thereby, the composition of the solvent in the preliminary dispersion step and the fine dispersion step can be made different from the composition of the dispersion medium in the finally obtained colored ink. As a result, it is possible to reliably obtain a colored ink having desired characteristics while suitably dispersing the dispersant in the preliminary dispersion step and finely dispersing the pigment particles in the fine dispersion step. The removal of the solvent can be performed, for example, by placing the target liquid in a reduced pressure atmosphere or heating.

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

<Board>
The substrate 11 is a plate-like member having optical transparency, and has a function of holding the colored portion 12 and the partition wall 13.
The substrate 11 is preferably made of a substantially transparent material. Thereby, a clearer image can be formed by the light transmitted through the color filter 1.

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

<Coloring part>
The colored portion 12 is formed using the color filter ink set as described above.
Since the coloring portion 12 is formed using the color filter ink set as described above, the variation in characteristics among the pixels is small, and unintentional color mixing (mixing of a plurality of types of color filter inks) is performed. ) Etc. are reliably prevented. For this reason, the color filter 1 has high reliability in which the occurrence of uneven color and uneven density is suppressed. Moreover, the color filter 1 is excellent in the coloring property of the coloring part 12, and excellent in contrast.

Each colored portion 12 is provided in a cell 14 which is a region surrounded by a partition wall 13 which will be described later.
The first colored portion 12A, the second colored portion 12B, and the third colored portion 12C have different colors. For example, the first colored portion 12A can be a red filter region (R), the second colored portion 12B can be a green filter region (G), and the third colored portion 12C can be a blue filter region (B). A set of different colored portions 12A, 12B, and 12C constitutes one pixel. In the color filter 1, a predetermined number of colored portions 12 are arranged in the horizontal direction and the vertical direction. For example, when the color filter 1 is a high-definition color filter, 1366 × 768 pixels are arranged, and when the color filter 1 is a full high-definition color filter, 1920 × 1080 pixels are arranged. In the case of a super high vision color filter, 7680 × 4320 pixels are arranged. Note that the color filter 1 may be provided with a spare pixel outside the effective area, for example.

<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 more preferably 0.5 to 3.5 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 resin material. Thereby, the partition wall 13 can be easily formed as having a desired shape by a method as described later. Moreover, when the partition 13 has a function as a light-shielding part, it may include a light-absorbing material such as carbon black as a constituent material.

《Color filter manufacturing method》
Next, the manufacturing method of the color filter of this invention is demonstrated.
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.

  The method for producing a color filter of the present invention includes a colored ink applying step for discharging colored ink into a cell, and a curable ink application for discharging a curable ink into a cell for discharging the colored ink. In this way, the colored ink and the curing ink are separately ejected into the cell, so that it is possible to reliably prevent the viscosity of each ink from increasing, and the ejection stability of each ink is excellent. can do. As a result, the color filter manufactured using such a manufacturing method has less density unevenness and color unevenness at each part. Moreover, the storage stability of each ink can be improved by dividing into colored ink and curable ink.

  As shown in FIG. 2, in this embodiment, the color filter manufacturing method includes a substrate preparation step (1a) for preparing the substrate 11, and a partition formation step (1b, 1c) for forming the partition 13 on the substrate 11. ), A colored ink applying step (1d) for applying the colored ink 2 to the region (cell) surrounded by the partition wall 13 by an inkjet method, and a curing ink for discharging the curing ink into the cell in which the colored ink is discharged An ink application step (1e), and a colored portion forming step (1f) in which the solvent is removed from the mixture of the colored ink 2 and the curing ink and then cured to form the colored portion 12.

Hereinafter, each step will be described in detail.
<Board preparation process>
First, the substrate 11 is prepared (1a). The substrate 11 prepared in this step is preferably subjected to a cleaning process. In addition, the substrate 11 prepared in this step has been subjected to appropriate pretreatment such as chemical treatment with a silane coupling agent or the like, plasma treatment, ion plating, sputtering, gas phase reaction method, vacuum deposition, and the like. Also good.

<Partition forming process>
Next, the radiation-sensitive composition for forming the partition walls of the substrate 11 is applied to almost the entire one surface of the substrate 11 to form the coating film 3 (1b). In addition, after giving a radiation sensitive composition on the board | substrate 11, you may perform a prebaking process as needed. The pre-bake treatment can be performed, for example, under the conditions of heating temperature: 50 to 150 ° C. and heating time: 30 to 600 seconds.

Then, the partition 13 is formed by performing a post-exposure baking process (PEB) by irradiating with a radiation through a photomask, and further performing a developing process using an alkaline developer (1c). PEB can be performed, for example, under the conditions of heating temperature: 50 to 150 ° C., heating time: 30 to 600 seconds, and radiation irradiation intensity: 1 to 500 mJ / cm ² . 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 set to, for example, 10 to 300 seconds. Further, after the development process, a post-bake process may be performed as necessary. The post-bake treatment can be performed, for example, under the conditions of heating temperature: 150 to 280 ° C. and heating time: 3 to 120 minutes.

<Coloring ink application process>
Next, the colored ink 2 constituting the above-described color filter ink set is applied to the cell 14 surrounded by the partition wall 13 by an inkjet method (1d).
This step is performed using a color filter ink set including a plurality of types of colored inks 2 corresponding to a 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 the colored inks 2 are mixed.

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

The first position control device 104 moves the droplet discharge means 103 along the X-axis direction and the Z-axis direction orthogonal to the X-axis direction in response to a signal from the control means 112. Further, the first position control device 104 also has a function of rotating the droplet discharge means 103 around an axis parallel to the Z axis. In the present embodiment, the Z-axis direction is a direction parallel to the vertical direction (that is, the direction of gravitational acceleration). The second position controller 108 moves the stage 106 along the Y-axis direction orthogonal to both the X-axis direction and the Z-axis direction in response to a signal from the control unit 112. Further, the second position control device 108 also has a function of rotating the stage 106 around an axis parallel to the Z axis.
The stage 106 has a plane parallel to both the X-axis direction and the Y-axis direction. The stage 106 is configured so that the substrate 11 having the cells 14 to which the colored 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 where the colored ink 2 is to be ejected from the external information processing apparatus.

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

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

In the present embodiment, the plurality of nozzles 118 in the droplet discharge head 114 form a nozzle row 116A and a nozzle row 116B that both extend in the X-axis direction. The nozzle row 116A and the nozzle row 116B are arranged in parallel with a space therebetween. In this embodiment, 90 nozzles 118 are arranged in a line in the X-axis direction at a constant interval LNP in each of the nozzle array 116A and the nozzle array 116B. Although the specific value of LNP is not specifically limited, It can be set as 100-180 micrometers.
The position of the nozzle row 116B is shifted from the position of the nozzle row 116A by a half length of the nozzle pitch LNP in the positive direction in the X-axis direction (right direction in FIG. 5). Therefore, the nozzle pitch HXP in the X-axis direction of the droplet discharge head 114 is half the nozzle pitch LNP of the nozzle row 116A (or nozzle row 116B).

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

  In the present embodiment, 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 colored ink 2 is not ejected from these 20 “pause nozzles”. Therefore, 160 nozzles 118 out of 180 nozzles 118 in the droplet discharge head 114 function as nozzles that discharge the colored ink 2.

As shown in FIG. 4, in the droplet discharge means 103, a plurality of the droplet discharge heads 114 are arranged in two rows along the X-axis direction. The droplet discharge heads 114 in one row and the droplet discharge 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. As a result, the droplet discharge means 103 is configured such that the nozzles 118 that discharge the colored ink 2 continue 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. ing.
In the droplet discharge means 103 of the present 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 FIGS. 6A and 6B, each droplet discharge head 114 is an inkjet head. More specifically, each droplet discharge head 114 includes a vibration plate 126 and a nozzle plate 128. Between the diaphragm 126 and the nozzle plate 128, a liquid pool 129 that is always filled with the colored ink 2 supplied from the tank 101 through the hole 131 is located.

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

  On the diaphragm 126, the vibrator 124 is positioned corresponding to each cavity 120. The vibrator 124 includes a piezoelectric element 124C and a pair of electrodes 124A and 124B that sandwich the piezoelectric element 124C. By applying a driving voltage between the pair of electrodes 124A and 124B, the colored ink 2 is ejected from the corresponding nozzle 118. The shape of the nozzle 118 is adjusted so that the colored ink 2 is ejected from the nozzle 118 in the Z-axis direction.

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 colored ink 2 ejected from the nozzle 118 may be controlled for each nozzle 118 in accordance with a signal from the control unit 112. The control unit 112 can also set the nozzle 118 that performs the ejection operation during the application scan and the nozzle 118 that does not perform the ejection operation.
In this specification, a portion including one nozzle 118, a cavity 120 corresponding to the nozzle 118, and a vibrator 124 corresponding to the cavity 120 may be referred to as “ejection unit 127”. According to this notation, one droplet discharge head 114 has the same number of discharge units 127 as the number of nozzles 118.

  Using the droplet discharge device 100 as described above, the colored ink 2 corresponding to the colored portions 12 of the color filter 1 is applied to the cells 14. By using the apparatus as described above, the colored ink 2 can be efficiently and selectively applied to the cells 14. In the configuration shown in the figure, the droplet discharge device 100 has only one color of the tank 101 that holds the colored ink 2, the tube 110, and the like. It may have a plurality of colors corresponding to the coloring portion 12. In manufacturing the color filter 1, a plurality of droplet discharge devices 100 corresponding to a plurality of color inks 2 may be used.

As described above, in the method for producing a color filter of the present invention, by having the curable ink, the uncured resin material and the curing agent are not simultaneously contained in the colored ink. For this reason, the colored ink has a low viscosity and is suitable, and the uniformity of ejection properties is stably maintained over a long period of time. For this reason, when droplets are discharged as described above, it is possible to reliably prevent unintentional variations in the droplet amount of the colored ink 2 applied to each cell 14.
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 to discharge colored ink using thermal expansion of a material by the electrothermal conversion element.

<Curing ink application process>
Next, a curing ink is applied in the cell 14 to obtain a mixture 4 (1e).
The application of the curable ink into the cell 14 is performed by an ink jet type droplet discharge device, and can be performed by the same method as the colored ink 2 using the droplet discharge device 100 as described above. .

Either the colored ink application step or the curing ink application step may be performed first or simultaneously. In other words, the colored ink may be applied to each cell first, the curable ink may be applied first, or the colored ink and the curable ink may be applied simultaneously. It may be.
Further, for example, coloring ink and curing ink may be alternately applied, and this may be repeated until the mixture on the cell reaches a predetermined amount. Thereby, the colored ink and the curable ink can be mixed more reliably, and a more uniform mixture can be obtained.

<Colored part forming step>
Next, the solvent is removed from the mixture 4 in the cell 14, and the uncured resin material is cured to form a solid colored portion 12 having a uniform thickness for each color (1f). Thereby, the color filter 1 is obtained.
The removal of the solvent can be performed by heating, for example. At this time, the substrate 11 provided with the mixture 4 may be placed in a reduced pressure environment. Thereby, the removal of the solvent can proceed more efficiently while preventing the occurrence of adverse effects on the substrate 11 and the like. In this step, energy irradiation such as ultraviolet rays, electron beams, or radiation may be performed. Thereby, the hardening reaction of an uncured resin material can be advanced efficiently.
By the manufacturing method as described above, the color filter 1 in which the colored portions 12 of the respective colors have a uniform thickness can be obtained.

<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 side of the color filter 1 on which the colored portion 12 is provided, a color filter 1 and a substrate 66. And a polarizing plate 67 provided on the surface side opposite to the surface of the substrate 11 of the color filter 1 opposite to the liquid crystal layer 62 (lower side in FIG. 7). And a polarizing plate 68 provided on the surface side opposite to the surface facing the liquid crystal layer 62 of the substrate 66 (upper side in FIG. 7). A common electrode 61 is provided on the surface of the color filter 1 on which the colored portion 12 and the partition wall 13 are provided (the surface opposite to the surface of the colored portion 12 and the partition wall 13 facing the substrate 11). On the surface of the (opposite substrate) 66 facing the liquid crystal layer 62 and the color filter 1, pixel electrodes 65 are arranged in a matrix at positions corresponding to the colored portions 12 of the color filter 1. Further, an alignment film 64 is provided between the common electrode 61 and the liquid crystal layer 62, and an alignment film 63 is provided between the substrate 66 (pixel electrode 65) and the liquid crystal layer 62.

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

  In the liquid crystal display device 60, light emitted from a backlight (not shown) enters from the polarizing plate 68 side (upper side in FIG. 7). And the light which permeate | transmitted the liquid crystal layer 62 and entered into each coloring part 12 (12A, 12B, 12C) of the color filter 1 is polarized as light of the color corresponding to each coloring part 12 (12A, 12B, 12C). The light is emitted from the plate 67 (lower side in FIG. 7).

  As described above, since the colored portion 12 is formed using the color filter ink set of the present invention, variation in characteristics among pixels is suppressed. As a result, in the liquid crystal display device 60, it is possible to stably display an image in which color unevenness, density unevenness, and the like at each part are suppressed. Moreover, since the coloring part 12 is formed using the ink set for color filters of this invention, it is excellent in contrast.

"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 a configuration of a mobile (or notebook) personal computer to which the electronic apparatus of the present invention is applied.
In this figure, a personal computer 1100 includes a main body 1104 having a keyboard 1102 and a display unit 1106. The display unit 1106 is supported by the main body 1104 via a hinge structure so as to be rotatable. Yes.
In the personal computer 1100, the display unit 1106 includes an image display device 1000.
FIG. 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 is provided with an image display device 1000 in a display unit, together with a plurality of operation buttons 1202, an earpiece 1204, and a mouthpiece 1206.

FIG. 10 is a perspective view showing the configuration of a digital still camera to which the electronic apparatus of the present invention is applied. In this figure, connection with an external device is also simply shown.
Here, an ordinary camera sensitizes a silver halide photographic film with a light image of a subject, whereas a digital still camera 1300 photoelectrically converts a light image of a subject with an imaging device such as a CCD (Charge Coupled Device). An imaging signal (image signal) is generated.

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

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

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

  The electronic device of the present invention includes, for example, a television (for example, a liquid crystal television), a video camera, a viewfinder type, a monitor in addition to the above-described personal computer (mobile personal computer), mobile phone, and digital still camera. Direct-view video tape recorder, laptop personal computer, car navigation system, pager, electronic notebook (including communication function), electronic dictionary, calculator, electronic game device, word processor, workstation, videophone, security TV monitor , Electronic binoculars, POS terminals, devices equipped with touch panels (for example, cash dispensers of financial institutions, automatic ticket vending machines), medical devices (for example, electronic thermometers, blood pressure monitors, blood glucose meters, electrocardiographic display devices, ultrasonic diagnostic devices, endoscopy) Mirror display device), fish finder, each Measuring instruments, gauges (e.g., gages for vehicles, aircraft, and ships), a flight simulator, various monitors, and a projection display such as a projector. In particular, televisions have a remarkable tendency to increase the size of display portions in recent years. However, in electronic devices having such a large display portion (for example, a display portion having a diagonal length of 80 cm or more), conventional color filter inks are used. When the color filter manufactured using the above is applied, problems such as uneven color and uneven density are particularly likely to occur. However, if the present invention is applied, such problems can be reliably prevented. That is, the effect of the present invention is more remarkably exhibited when applied to an electronic apparatus having a large display unit as described above.

As mentioned above, although this invention was demonstrated based on suitable embodiment, this invention is not limited to these.
For example, the colored ink is not limited to that obtained by the method described above.
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.

Next, specific examples of the present invention will be described.
[1] Polymer synthesis (preparation of polymer solution)
(Synthesis Example 1)
Into a 1 L reaction vessel equipped with a stirrer, a reflux condenser, a dropping funnel, a nitrogen introduction tube and a thermometer, 37.6 parts by weight of 1,3-butylene glycol diacetate as a solvent (solvent) was placed at 90 ° C. Heated. Subsequently, 2,2′-azobis (isobutyronitrile) (AIBN): 2 parts by weight and 1,3-butylene glycol diacetate (solvent): 3 parts by weight were added to the flask. (3,4-epoxycyclohexyl) methyl methacrylate (manufactured by Daicel Chemical Industries, trade name Cyclomer M100): 27 parts by weight, 2- (0- [1′methylpropylideneamino] carboxyamino) ethyl methacrylate ( Showa Denko Co., Ltd., trade name MOI-BM): 1.5 parts by weight, 2-hydroxyethyl methacrylate (HEMA): 1.5 parts by weight was added dropwise over about 4 hours using a dropping pump. did. On the other hand, 2,2'-azobis (isobutyric acid) dimethyl (trade name V-601, manufactured by Wako Pure Chemical Industries, Ltd.) as a polymerization initiator: 5 parts by weight of 1,3-butylene glycol diacetate (solvent): A solution (polymerization initiator solution) dissolved in 20 parts by weight was dropped over about 4 hours using another dropping pump. After completion of dropping of the polymerization initiator solution, AIBN: 0.2 part by weight and 1,3-butylene glycol diacetate (solvent): 1 part by weight were added and kept at the same temperature for about 2 hours. AIBN: 0.2 part by weight and 1,3-butylene glycol diacetate (solvent): 1 part by weight was added and kept at about the same temperature for about 2 hours. A polymer solution A1 containing was obtained.
(Synthesis Examples 2 to 10)
Except for changing the type of monomer component used in the synthesis of the polymer (preparation of polymer solution), the amount used, and the type of solvent (solvent) as shown in Table 1, the same operation as in Synthesis Example 1 was performed. went. As a result, nine types of polymer solutions containing the polymer A (polymer solutions A2 to A10) were obtained.

(Synthesis Example 11)
(3,4-epoxycyclohexyl) methyl methacrylate (manufactured by Daicel Chemical Industries, trade name Cyclomer M100), 2- (0- [1 ′ methylpropylideneamino] carboxyamino) ethyl methacrylate (Showa Denko K.K. Manufactured, trade name MOI-BM), and γ-methacryloxypropyltrimethoxysilane (manufactured by Dow Corning Toray, trade name SZ6030): 30 parts by weight instead of 2-hydroxyethyl methacrylate (HEMA) Except for the above, the same operation as in Synthesis Example 1 was performed. As a result, a polymer solution B1 (homopolymer solution) containing the polymer B was obtained.
(Synthesis Examples 12 to 16)
The same operations as in Synthesis Example 11 were performed except that the types of monomer components used in polymer synthesis (preparation of polymer solution), the amounts used, and the types of solvents (solvents) were changed as shown in Table 1. went. As a result, five types of polymer solutions containing the polymer B (polymer solutions B2 to B6) were obtained.

(Synthesis Example 17)
(3,4-epoxycyclohexyl) methyl methacrylate (manufactured by Daicel Chemical Industries, trade name Cyclomer M100), 2- (0- [1 ′ methylpropylideneamino] carboxyamino) ethyl methacrylate (Showa Denko K.K. Manufactured, trade name MOI-BM), and 1H, 1H, 5H-octafluoropentyl methacrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd., trade name Biscote 8FM): 30 weight instead of 2-hydroxyethyl methacrylate (HEMA) The same operations as in Synthesis Example 1 were performed except that the parts were used. As a result, a polymer solution C1 (homopolymer solution) containing the polymer C was obtained.
(Synthesis Examples 18 and 19)
The same operations as in Synthesis Example 17 were performed except that the types of monomer components used in the synthesis of the polymer (preparation of polymer solution), the amounts used, and the types of solvents (solvents) were changed as shown in Table 1. went. As a result, two types of polymer solutions (polymer solutions C2 and C3) containing the polymer C were obtained.

The residual amount of the polymerization initiator in each polymer solution obtained in each synthesis example was 300 ppm or less. The residual amount of the polymerization initiator was measured by gas chromatography.
Table 1 summarizes the types of materials used in the synthesis of polymers in Synthesis Examples 1 to 19 (preparation of polymer solutions) and the amounts used (compositions of the polymers synthesized in Synthesis Examples 1 to 19). In the table, “S” means a solvent (solvent), in particular, “S1” indicates 1,3-butylene glycol diacetate, and “S2” indicates bis (2-butoxyethyl) ether "S3" represents diethylene glycol monobutyl ether acetate, and "S4" represents tripropylene glycol monomethyl ether. “V-601” indicates 2,2′-azobis (isobutyric acid) dimethyl, “AIBN” indicates 2,2′-azobis (isobutyronitrile), and “a1-1”. Indicates (3,4-epoxycyclohexyl) methyl methacrylate (cyclomer M100), “a1-2” indicates (3,4-epoxycyclohexyl) methyl acrylate, and “a2-1” indicates methacrylic acid. Acid 2- (0- [1′methylpropylideneamino] carboxyamino) ethyl (MOI-BM), “a2-2” is 2-acryloyloxyethyl isocyanate (manufactured by Showa Denko KK, trade name “ Karenz MOI ")," a3-1 "indicates 2-hydroxyethyl methacrylate (HEMA), and" a3-2 "indicates 4-hydro “A4-1” indicates 1H, 1H, 5H-octafluoropentyl methacrylate (Biscoat 8FM), “a4-2” indicates 2-ethylhexyl methacrylate, “b1-1” indicates γ-methacryloxypropyltrimethoxysilane (SZ6030), “b1-2” indicates γ-methacryloxypropyltriethoxysilane, and “b2-1” indicates ethyl methacrylate. "C1-1" indicates 1H, 1H, 5H-octafluoropentyl methacrylate (Biscoat 8FM), and "c1-2" indicates 1,2,3,4,5-pentafluorostyrene “C2-1” indicates 2,3-dihydroxybutyl methacrylate, and “c2-2” indicates Indicates hexyl methacrylate. In the table, the weight average molecular weight Mw of the polymer constituting the polymer solution is also shown.

[2] Preparation of color filter ink set (Example 1)
[Preparation of colored ink]
Dispersic 111: 5.04 g (14 parts by weight) as a dispersant, Dispersic 166: 28.07 g (78 parts by weight) as a dispersant, and SPCN-17X (made by Showa Polymer Co., Ltd.) as a thermoplastic resin ): 19.43 g (54 parts by weight) and 1,3-butylene glycol diacetate as a solvent: 91.05 g (253 parts by weight) were charged into a stirrer (uniaxial mixer) having an internal capacity of 400 cc, and a disper mill The mixture was stirred for 10 minutes and predispersed to obtain a dispersant dispersion (preliminary dispersion step). At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm.

Next, as described below, a fine dispersion step was performed in which a pigment was added to the dispersant dispersion obtained in the preliminary dispersion step, and inorganic beads were added in multiple stages for fine dispersion treatment.
First, pigment: 35.99 g (100 parts by weight) was added all at once to the obtained dispersant dispersion, followed by stirring 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 254 and a pigment derivative represented by the formula (5): 25.85 g; I. A mixture of Pigment Red 177 and the pigment derivative represented by the formula (4): 7.60 g, and a sulfonated pigment derivative powder having a chemical structure represented by the formula (6): 3.55 g were used. At this time, the mixture was diluted with 1,3-butylene glycol diacetate as the first liquid medium so that the pigment content in the mixture of the dispersant dispersion and the pigment was 16 wt%.

Next, inorganic beads having an average particle size of 0.8 mm (first inorganic beads, manufactured by Zirconia, “Toray ceramic pulverized ball” (trade name), manufactured by Toray Industries, Inc.) are added and stirred at room temperature for 30 minutes. First-stage distributed processing (first processing) was performed. At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm.
Next, the inorganic beads (first inorganic beads) are removed by filtration using a filter (“PALL HDCII Membrane Filter”, manufactured by PALL), and then inorganic beads having a mean particle diameter of 0.1 mm (second Inorganic beads, made of zirconia, “Toray ceramic pulverized ball” (trade name), manufactured by Toray Industries, Inc.) were added, and the mixture was further stirred for 30 minutes to perform the second stage dispersion treatment (second treatment). At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm. Further, it was diluted with 1,3-butylene glycol diacetate as the first liquid medium.
Thereafter, the inorganic beads (second inorganic beads) were removed by filtration using a filter (“PALL HDCII Membrane Filter” (trade name), manufactured by PALL) to obtain a pigment dispersion.

  Next, the pigment dispersion obtained as described above, polymer solution A1, polymer solution B1, polymer solution C1, and 1,3-butylene glycol diacetate as a solvent were mixed. In this step, the pigment dispersion, the polymer solution A1, the polymer solution B1, and the polymer solution C1 are put into a stirrer (uniaxial mixer) having a content of 400 cc and stirred for 10 minutes with a disper mill. It went by. At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm. As a result, the intended red color filter ink (R ink) was obtained. The pigment content of the R ink at this time 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, a first ink set composed of three colors of R, G, and B corresponding to the R ink was obtained. The average particle diameter of the pigment constituting the R ink, the average particle diameter of the pigment constituting the G ink, and the average particle diameter of the pigment constituting the B ink were 70 nm, 70 nm, and 70 nm, respectively. Examples of the G ink pigment include C.I. I. Pigment Green 58 and a sulfonated pigment derivative powder having a chemical structure represented by the formula (6) were used, and the pigment content in the final G ink was 10.1 wt%. Examples of the B ink pigment include C.I. I. Pigment Blue 15: 6 was used, and the pigment content in the final B ink was 4.9 wt%.

[Curing ink]
Methyl hexahydrophthalic anhydride as a curing agent (manufactured by Dainippon Ink & Chemicals, Inc., trade name “Epilog B-650”): 20 parts by weight, Dispersic 111: 1 part by weight as a dispersant, Dispersic 166 as a dispersant: 2 parts by weight and 1,3-butylene glycol diacetate as a solvent: 77 parts by weight are charged into a stirrer (uniaxial mixer) with a content of 400 cc, stirred, and the curing ink is added. Obtained.

(Examples 2 to 7)
The same manner as in Example 1 except that the types and amounts of materials used for the preparation of the colored ink were changed as shown in Table 2, and the constituent materials and content of the curing ink were changed as shown in Table 3. Thus, an ink set for a color filter was prepared.
(Comparative example)
In the mixing of each polymer and solvent in the preparation of the colored ink of Example 1, methylhexahydrophthalic anhydride (manufactured by Dainippon Ink & Chemicals, Inc., trade name “Epilog B-650”) as a curing agent was used. An ink set for a color filter was prepared in the same manner as in Example 1 except that the content ratio of each component was adjusted as shown in Table 2.

Tables 2 and 3 collectively show the compositions and characteristics of the color inks and the curing inks of the above Examples and Comparative Examples.
In the table, C.I. I. Pigment Red 254 is "PR254", C.I. I. Pigment Red 177 is “PR177”, C.I. I. Pigment Green 58 is changed to “PG58”, C.I. I. Pigment Green 36 is “PG36”, C.I. I. Pigment Blue 15: 6 is changed to “PB15: 6”, C.I. I. Pigment Yellow 150 is changed to “PY150”, C.I. I. Pigment Red 254 and a pigment derivative represented by the formula (5) are referred to as “PR254D”, C.I. I. “PR177D” is a mixture of Pigment Red 177 and the pigment derivative represented by formula (4), “SPD” is a powder composed of the pigment derivative represented by formula (6), and 1,3-butylene glycol diacetate "S1", bis (2-butoxyethyl) ether "S2", diethylene glycol monobutyl ether acetate "S3", tripropylene glycol monomethyl ether "S4", Dispersic 111 "DA1", Dispersic 2095 " DA2 ", Dispersic P104" DA3 ", Dispersic 166" DA4 ", Dispersic 9075" DA5 ", SPCN-17X" DR1 ", methylhexahydrophthalic anhydride" MHF ", isophoronediamine" IPD ".

  In Table 2, in the column of the uncured resin material, the polymer contained in the polymer solution A1 is indicated by A1. Similarly, the polymers contained in the polymer solutions A2 to A9, B1 to B5, and C1 to C3 are indicated as A2 to A9, B1 to B5, and C1 to C3, respectively. The viscosity was measured in an environment of 25 ° C. using an E-type viscometer (manufactured by Toki Sangyo Co., Ltd., RE-01) in accordance with JIS Z8809.

[3] Color filter ink stability evaluation (durability evaluation)
[3.1] Appearance change after heat treatment The color filter ink sets (colored inks) of the respective examples and comparative examples were allowed to stand for 12 days in an environment of 60 ° C., and then visually observed. Evaluation was performed according to the four-stage criteria.
A: No change from before heating is observed.
B: Slight aggregation / precipitation of pigment particles is observed.
C: Aggregation / sedimentation of pigment particles is clearly observed.
D: Aggregation / sedimentation of pigment particles is noticeable.

[3.2] Viscosity change amount For the color filter ink sets (colored inks) of the above Examples and Comparative Examples, the viscosity (kinematic viscosity) after being left in a 60 ° C. environment for 12 days was measured. The difference from the viscosity immediately after production was determined. That is, when the viscosity immediately after production is ν ₀ [mPa · s] and the viscosity after being left in a 50 ° C. environment for 14 days is ν ₁ [mPa · s], it is represented by ν ₁ −ν _0. The value was determined. The values thus obtained were evaluated according to the following five-stage criteria.

A: The value of ν ₁ −ν ₀ is less than 0.2 mPa · s.
B: The value of ν ₁ −ν ₀ is 0.2 mPa · s or more and less than 0.3 mPa · s.
C: The value of ν ₁ −ν ₀ is 0.3 mPa · s or more and less than 0.5 mPa · s.
D: The value of ν ₁ −ν ₀ is 0.5 mPa · s or more and less than 0.7 mPa · s.
E: The value of ν ₁ −ν ₀ is 0.7 mPa · s or more.

[4] Droplet discharge stability evaluation (discharge stability evaluation)
Using the color filter ink sets obtained in each of the above Examples and Comparative Examples, evaluation by the following tests was performed.
[4.1] 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 inks of the respective examples and comparative examples, and drive waveforms of piezoelectric elements. With each of the inks optimized, 100,000 droplets (100,000 droplets) were continuously ejected from each nozzle of the droplet ejection head in an environment of 28 ° C. and 60% RH. For the 100,000 droplets ejected from the designated nozzle near the center of the droplet ejection head, the average value of the deviation amount d from the center aiming position of the center position of each landed droplet is obtained, and the following four steps Evaluation was performed according to the criteria of
A: The average value of the shift amount d is less than 0.05 μm.
B: The average value of the shift amounts d is 0.05 μm or more and less than 0.10 μm.
C: The average value of the shift amounts d is 0.10 μm or more and less than 0.15 μm.
D: The average value of the shift amounts d is 0.15 μm or more.

[4.2] Stability evaluation of droplet discharge amount Prepared are a droplet discharge device as shown in FIG. 3 to FIG. 6 installed in a chamber (thermal chamber) and inks of the above examples and comparative examples, With the drive waveform of the piezo element optimized, 100,000 droplets (100,000 droplets) were continuously discharged from each nozzle of the droplet discharge head for each ink in an environment of 30 ° C. and 55% RH. . 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.
A: The value of ΔW / _{W T} is less than 0.023.
B: The value of ΔW / _{W T} is less than 0.023 than 0.430.
C: The value of ΔW / _{W T} is less than 0.430 than 0.770.
D: The value of ΔW / _{W T} is 0.770 or more.

[4.3] Evaluation of intermittent printing performance A droplet discharge device as shown in FIGS. 3 to 6 installed in a chamber (thermal chamber) and ink sets of the above-described examples and comparative examples are prepared to drive a piezoelectric element. With the waveform optimized, 10,000 droplets (10,000 droplets) are continuously discharged from each nozzle of the droplet discharge head for each ink in an environment of 30 ° C. and 55% RH. Discharge of droplets was interrupted for 1 second (first sequence). Thereafter, similarly, the operation of continuously discharging the droplets and interrupting the discharge of the droplets were repeated. For the designated 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 ₂₀ [ng] of the droplets discharged in the 20th sequence And asked. Then, the ratio (| W ₁ −W ₂₀ | / W _T ) of the absolute value of the difference between W ₁ and W ₂₀ to the target discharge amount W _T [ng] of the droplet is obtained, and the following three criteria are used. ,evaluated. | _W 1 _-W 20 | as the value of / _{W T} is small, it can be said to be excellent in intermittent printing performance (stability of the droplet discharge quantity).
_A: | _{W 1} -W 20 | values of / _{W T} is less than 0.028.
_B: | _{W 1} -W 20 | values of / _{W T} is less than 0.028 or 0.700.
_C: | _{W 1} -W 20 | value of / _{W T} is 0.700 or more.

[4.4] Continuous Discharge Test Using a droplet discharge apparatus as shown in FIGS. 3 to 6 installed in a chamber (thermal chamber), the ink sets of the above examples and comparative examples, 30 ° C., 55% Each ink was ejected by operating the droplet ejection device continuously for 64 hours under an RH environment.
The nozzle clogging rate ([(number of clogged nozzles) / (total number of nozzles)] × 100) obtained after continuous operation is found and the nozzles are clogged. With respect to the above, it was examined whether or not clogging can be eliminated by a cleaning member made of a plastic material. The results were evaluated according to the following four criteria.

A: No nozzle clogging occurs.
B: The occurrence rate of nozzle clogging is less than 0.6% (excluding zero), and clogging can be eliminated by cleaning.
C: The occurrence rate of nozzle clogging is 0.6% or more and less than 1.2%, and clogging can be eliminated by cleaning.
D: The occurrence rate of nozzle clogging is 1.2% or more, or clogging cannot be eliminated by cleaning.
In addition, said evaluation was performed on the same conditions about each Example and the comparative example.

[5] Production of color filter Ink set for color filter (color filter ink immediately after production) obtained in each of the above examples and comparative examples, and an ink set for color filter left in a 60 ° C. environment for 10 days A color filter was manufactured as follows using (ink set for color filter left in a heating environment).

First, a soda glass substrate (G5 size: 1100 × 1300 mm) on which a silica (SiO ₂ ) film for preventing elution of sodium ions was formed on both surfaces was prepared and subjected to a cleaning treatment.
Next, the radiation-sensitive composition for forming partition walls containing carbon black was applied to the entire surface of one of the cleaned substrates to form a coating film.
Next, prebaking was performed under the conditions of heating temperature: 110 ° C. and heating time: 120 seconds.

Thereafter, irradiation with radiation is performed through a photomask to perform post-exposure baking (PEB), followed by development using an alkaline developer, and further by performing post-baking, thereby separating the partition walls. Formed. PEB was performed under the conditions of heating temperature: 110 ° C., heating time: 120 seconds, and radiation irradiation intensity: 150 mJ / cm ² . The development process was performed by, for example, a vibration dipping method. The development processing time was 60 seconds. The post-bake treatment was performed under the conditions of heating temperature: 150 ° C. and heating time: 5 minutes. The formed partition wall had a thickness of 2.1 μm.

Next, using a droplet discharge device as shown in FIGS. 3 to 6, colored ink was discharged into a cell as a region surrounded by a partition wall. At this time, colored inks of three colors were used so that the colored inks of the respective colors were not mixed. In addition, as the droplet discharge head, a nozzle plate joined with an epoxy adhesive (AE-40 manufactured by Ajinomoto Fine Techno Co., Ltd.) was used.
Next, the curing ink was applied in the cell to which the colored ink was applied. In addition, the application amount of the curing ink was adjusted so that the addition amount of the curing agent became a value shown in Table 4 with respect to 100 parts by weight of the uncured resin material in the colored ink applied in the cell.

Thereafter, heat treatment was performed on a hot plate at 100 ° C. for 10 minutes, and further, heat treatment was performed in an oven at 200 ° C. for 1 hour, whereby three colored portions were formed. Thereby, a color filter as shown in FIG. 1 was obtained.
Using the method as described above, 8,000 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] Color unevenness and density unevenness Among the color filters manufactured using the color filter inks (ink sets) of the respective Examples and Comparative Examples, the color filters manufactured for the 8000th sheet are 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, visual observation is performed in a dark room with red single color display, green single color display, blue single color display, and white single color display, and color unevenness and density at each part. The occurrence of unevenness was evaluated according to the following five-stage criteria.

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

[6.2] 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 first to tenth sheets and 7990, respectively. A color filter manufactured for the 7th to 7999th sheets is prepared, and in a dark room, a red single color display, a green single color display, a blue single color display, and a white single color display are performed. A spectrophotometer (MCPD3000, manufactured by Otsuka Electronics Co., Ltd.) The color was measured using. From the results, for each of the examples and comparative examples, the color difference (in the Lab display system) that is the largest among the color filters manufactured in the 1st to 10th sheets and the 7990 to 7999th sheets (total 20 color filters), respectively. The color difference ΔE) was determined and evaluated according to the following five-step criteria.

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

[6.3] Durability Among the color filters manufactured using the color filter inks (ink sets) of the respective Examples and Comparative Examples, the color filters manufactured for the 7990th to 7999th sheets are used. 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 50 ° C. environment for 2 hours, then in a 20 ° C. environment for 1.5 hours, and then in a −15 ° C. environment. For 3 hours. Thereafter, the environmental temperature was returned again to 20 ° C., which was set as 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] Contrast Evaluation Color filter ink obtained in each of the above Examples and Comparative Examples (color filter ink immediately after manufacture) and color filter ink left in a 60 ° C. environment for 10 days (heating) Using the color filter ink left in the environment, the following evaluation was performed.
A red colored film was formed on each of different glass plates (diameter: 10 cm) by the ink jet method using the R inks constituting the ink sets of the respective Examples and Comparative Examples.
The colored film was formed by performing heat treatment at 110 ° C. for 8 minutes on a hot plate after droplet discharge onto the glass plate, and further performing heat treatment in an oven at 220 ° C. for 45 minutes. The discharge amount of the color filter ink was adjusted so that the thickness of the formed colored film was 1.5 μm.

Thus, about the glass substrate in which the colored film was formed, contrast (CR) was calculated | required using the contrast tester (the Kasaka Electric Co., Ltd. make, CT-1), and it evaluated in accordance with the following three steps | paragraphs.
A: CR is 3300 or more.
B: CR is 2200 or more and less than 3300.
C: CR is less than 2200.

For the G ink and B ink constituting the ink set of each of the examples and comparative examples, a colored film is formed on a glass plate (diameter: 10 cm) by the inkjet method in the same manner as described above. Contrast was calculated | required about the made glass substrate.
The glass substrate on which the green colored film was formed was evaluated according to the following three-stage criteria.
A: CR is 12000 or more.
B: CR is 5800 or more and less than 12000.
C: CR is less than 5800.

The glass substrate on which the blue colored film was formed was evaluated according to the following three-stage criteria.
A: CR is 3000 or more.
B: CR is 2500 or more and less than 3000.
C: CR is less than 2500.

In the above evaluation, each color filter and each glass plate were observed and measured under the same conditions.
These results are shown in Table 5. In the table, the color filter ink immediately after production is indicated as “before heating”, and the color filter ink left in a 60 ° C. environment for 10 days (color filter ink left in a heating environment) is “after heating”. "

As is apparent from Table 5, the color filter ink set of the present invention is excellent in display stability (storage stability), and even after the color filter ink is allowed to stand under heating conditions, the liquid droplet ejection is suitably performed. As a result, it was possible to stably produce an excellent quality color filter. Further, in the present invention, the stability of droplet discharge is excellent, and the produced color filter has suppressed color unevenness, density unevenness, and light leakage, and has small variations in characteristics among individuals. Met. In the present invention, the durability of the color filter was also excellent. In the present invention, the contrast and brightness were also excellent. 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 ... Coloring part 12A ... 1st coloring 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 (counter 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 110 ... tube 112 ... control means 114 ... droplet discharge head (inkjet head) 116A, 116B ... nozzle array 118 ... nozzle 120 ... cavity 122 ... partition wall 124 ... vibrator 124A, 124B ... electrode 12 C ... Piezo element 126 ... Diaphragm 127 ... Discharge unit 128 ... Nozzle plate 129 ... Liquid pool 130 ... Supply port 131 ... Hole 1000 ... Image display device 1100 ... Personal computer 1102 ... Keyboard 1104 ... Main body 1106 ... Display unit 1200 ... Mobile Telephone 1202 ... Operation buttons 1204 ... Earpiece 1206 ... Mouthpiece 1300 ... Digital still camera 1302 ... Case (body) 1304 ... Light receiving unit 1306 ... Shutter button 1308 ... Circuit board 1312 ... Video signal output terminal 1314 ... Input for data communication Output terminal 1430 ... TV monitor 1440 ... Personal computer

Claims (15)

A color filter ink set used for manufacturing a color filter having a colored portion in a large number of cells provided on a substrate by an inkjet method,
A colored ink comprising a colorant and an uncured resin material;
An ink set for a color filter, comprising: a curing ink containing a curing agent that accelerates a curing reaction of the uncured resin material by being discharged into the same cell as the colored ink.   The color filter ink set according to claim 1, wherein the uncured resin material includes an epoxy resin.   The color filter ink set according to claim 1 or 2, wherein the uncured resin material includes a polymer A containing at least an epoxy group-containing vinyl monomer a1 as a monomer component.   The polymer A contains, as a monomer component, a vinyl monomer a2 having an isocyanate group or a blocked isocyanate group in which it is protected with a protective group, in addition to the epoxy group-containing vinyl monomer a1. The color filter ink set according to claim 3, which is a copolymer.   The said polymer A is a copolymer which contains the vinyl monomer a3 provided with the hydroxyl group in addition to the said epoxy group containing vinyl monomer a1 as a monomer component. Ink set for color filters. The uncured resin material further includes a polymer B containing at least an alkoxysilyl group-containing vinyl monomer represented by the following formula (1) as a monomer component. The color filter ink set described in 1.

  The color filter ink set according to claim 6, wherein a ratio of the content ratio of the polymer A and the content ratio of the polymer B in the colored ink is 25:75 to 75:25 by weight. The uncured resin material further includes a polymer C containing at least a fluoroalkyl group- or fluoroaryl group-containing vinyl monomer c1 represented by the following formula (2) as a monomer component. The ink set for color filters in any one of thru | or 7.

  9. The color filter ink set according to claim 8, wherein a ratio of the content ratio of the polymer A and the content ratio of the polymer C in the colored ink is 50:50 to 99: 1 in weight ratio.   The color filter ink set according to claim 1, comprising a plurality of types of the colored inks and at least one type of resin material curing ink. A method for producing a color filter by ejecting ink by an inkjet method on a substrate provided with a large number of cells,
A colored ink application step of discharging a colored ink containing a colorant and an uncured resin material into the cell;
A method for producing a color filter, comprising: a curing ink application step for ejecting a curing ink containing a curing agent that accelerates curing of the uncured resin material in the cell that ejects the colored ink. .   A color filter manufactured using the color filter ink set according to claim 1.   A color filter manufactured using the method according to claim 11.   An image display device comprising the color filter according to claim 12.   An electronic apparatus comprising the image display device according to claim 14.

Images