JP2010019957A - Ink for color filter, ink set for color filter, color filter, image display device and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ink for color filters of an ink-jet system which can manufacture a color filter which is superior in lightness and contrast ratio, an ink set for color filters including the ink for color filters, a color filter which is superior in lightness and contrast ratio, and an image display device and an electronic apparatus which is equipped with the color filter. <P>SOLUTION: The ink for color filters used in the manufacture of a color filter by the ink-jet system comprises a colorant, a curable resin material and a solvent which dissolves the curable resin material, wherein the solvent comprises a component x and a component y having a boiling point higher than the component x, and the component y has higher compatibility, with the curable resin material than that of the component x. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

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

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

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

  By the way, the manufacturing method as described above generally applies ink to cells formed on a substrate, and heats the applied ink to dry and solidify the ink to form a colored portion. To get. However, when the ink is dried by heating or vacuum drying, a phenomenon in which the ink undergoes heat convection (benard cell phenomenon) occurs in the cell due to volatilization of the liquid component from the outer surface of the ink. Further, due to heat distribution in the ink in the cell, the volatilization of the liquid component in the ink tends to occur from a specific part of the cell. Due to the above factors, when the conventional ink is used, the surface of the colored portion to be formed has many irregularities. As described above, when the formed colored portion is not flat, there is a problem that the brightness and contrast ratio of the image display device using the color filter are not high.

JP 2002-372613 A

  An object of the present invention is to provide an ink for an ink-jet color filter that can produce a color filter excellent in brightness and contrast ratio, and to provide an ink set for a color filter provided with the color filter ink. It is another object of the present invention to provide a color filter excellent in brightness and contrast ratio, 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 of the present invention is a color filter ink used for producing a color filter by an inkjet method,
A colorant, a curable resin material, and a solvent that dissolves the curable resin material,
The solvent has a component x and a component y having a boiling point higher than that of the component x,
Of the solubility parameters of the component x, the polar component is SP _p (x) [(cal / cm ³ ) ^1/2 ] and the hydrogen bond component is SP _h (x) [(cal / cm ³ ) ^1/2 ]. ,
Among the solubility parameters of the component y, the polar component is SP _p (y) [(cal / cm ³ ) ^1/2 ], and the hydrogen bond component is SP _h (y) [(cal / cm ³ ) ^1/2 ]. ,
Of the solubility parameters of the curable resin material, the polar component is SP _p (R) [(cal / cm ³ ) ^1/2 ], and the hydrogen bond component is SP _h (R) [(cal / cm ³ ) ^1/2. ], The following formulas (I) to (IV) are satisfied.
0.2 ≦ | SP _p (x) −SP _p (R) | ≦ 3 (I)
0.5 ≦ | SP _h (x) −SP _h (R) | ≦ 3 (II)
_{| SP p (y) -SP p} (R) | <| SP p (x) -SP p (R) | ... (III)
_{| SP h (y) -SP h} (R) | <| SP h (x) -SP h (R) | ... (IV)
Thereby, an ink for an ink-jet color filter capable of producing a color filter excellent in brightness and contrast ratio can be provided.

In the color filter ink of the present invention, the values of SP _p (y) [(cal / cm ³ ) ^1/2 ] and SP _p (R) [(cal / cm ³ ) ^1/2 ] are both It is preferable that it is 2-5 (cal / cm < ³ >) ^<1/2 >.
Thereby, the flatness of the colored portion is further improved, and the brightness and contrast ratio of the color filter are further improved.

In the color filter ink of the present invention, the values of SP _h (y) [(cal / cm ³ ) ^1/2 ] and SP _h (R) [(cal / cm ³ ) ^1/2 ] are both 3~8 (cal ^/ cm ³⁾ is preferably ^1/2.
Thereby, the flatness of the colored portion is further improved, and the brightness and contrast ratio of the color filter are further improved.

In the color filter ink of the present invention, the SP _p (y) [(cal / cm ³ ) ^1/2 ], the SP _p (R) [(cal / cm ³ ) ^1/2 ], the SP _h (y ) [(Cal / cm ³ ) ^1/2 ] and SP _h (R) [(cal / cm ³ ) ^1/2 ] satisfy the relationship of the following formula (V) and the following formula (VI). Is preferred.
| SP _p (y) −SP _p (R) | ≦ 1 (V)
_{| SP h (y) -SP h} (R) | ≦ 1 ... (VI)
As a result, when the ink is dried and the colored portion is formed, it is more reliably prevented that the viscosity of the ink suddenly increases in viscosity, the ink in the cell retains sufficient fluidity, and Retention is reliably suppressed. As a result, the flatness of the colored portion is further improved, and the brightness and contrast ratio of the color filter are further improved.

In the color filter ink of the present invention, when the boiling point of the component x under atmospheric pressure is T _bp (x) [° C.] and the boiling point of the component y under atmospheric pressure is T _bp (y) [° C.] It is preferable that 15 ≦ T _bp (y) −T _bp (x) ≦ 70.
Thereby, when the ink is dried and the colored portion is formed, the viscosity of the ink is more reliably prevented from increasing suddenly. As a result, the flatness of the colored portion is further improved, and the brightness and contrast ratio of the color filter are further improved.

In the color filter ink of the present invention, when the content of the component x in the color filter ink is X [wt%] and the content of the component y is Y [wt%], 2 ≦ X / Y ≦ 30 is preferable.
Thereby, when the ink is dried and the colored portion is formed, the viscosity of the ink is more reliably prevented from increasing suddenly. As a result, the flatness of the colored portion is further improved, and the brightness and contrast ratio of the color filter are further improved.

In the color filter ink of the present invention, it is preferable that the color filter ink contains at least one of a polyhydric alcohol or a polyhydric alcohol alkyl ether as the component y.
Thereby, at the time of formation of the colored portion, the color filter ink in the cell has a relatively high viscosity, the fluidity is more suitably maintained, and convection in the cell is more reliably suppressed.

In the color filter ink of the present invention, the polyhydric alcohol is preferably an oligomer of glycols.
Thereby, at the time of formation of the colored portion, the color filter ink in the cell has a relatively high viscosity, the fluidity is more suitably maintained, and the convection in the cell is more reliably suppressed.

In the color filter ink of the present invention, the curable resin material preferably contains a polymer A containing at least an epoxy group-containing vinyl monomer a1 as a monomer component.
As a result, the formed colored portion retains excellent flatness over a long period of time, and the obtained color filter can have excellent brightness and contrast ratio over a long period of time.

In the color filter ink 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. A copolymer containing the vinyl monomer a2 is preferred.
Thereby, the bursting of bubbles in the color filter ink at the time of forming the colored portion can be prevented, and the colored portion can be made particularly flat. In addition, the color change (colored portion) produced using the color filter ink can be more reliably prevented from changing with time, and the durability of the color filter can be made particularly excellent.

これにより、基板上に吐出されたインクは、好適に基板上に濡れ広がることができ、結果として得られる着色部の厚みを特に均一なものとすることができる。 In the color filter ink of the present invention, the curable resin material includes a polymer B containing at least an alkoxysilyl group-containing vinyl monomer represented by the following formula (1) as a monomer component. It is preferable.

Thereby, the ink discharged on the substrate can be suitably spread on the substrate, and the thickness of the resulting colored portion can be made particularly uniform.

The color filter ink set of the present invention is a color filter ink set comprising a plurality of different color filter inks,
The color filter ink of the present invention is provided as the color filter ink.
Thereby, an ink set for an ink-jet color filter capable of producing a color filter excellent in brightness and contrast ratio can be provided.

The color filter of the present invention is manufactured using the color filter ink of the present invention.
Thereby, a color filter excellent in brightness and contrast ratio can be provided.
The color filter of the present invention is manufactured using the color filter ink set of the present invention.
Thereby, a color filter excellent in brightness and contrast ratio can be provided.

An image display device according to the present invention includes the color filter according to the present invention.
Thereby, the image display apparatus provided with the color filter excellent in the brightness and contrast ratio in the display part can be provided.
An electronic apparatus according to the present invention includes the image display device according to the present invention.
Thereby, an electronic apparatus provided with a color filter excellent in brightness and contrast ratio in the display unit can be provided.

Hereinafter, preferred embodiments of the present invention will be described.
《Color filter ink》
The color filter ink of the present invention is an ink used for the production of a color filter (formation of a colored portion of a color filter), and is particularly used for the production of a color filter by an ink jet method. In this specification, ink drying means volatilization (removal) of liquid components (organic liquid, water, etc.) contained in the ink.

  The color filter ink contains a colorant, a curable resin material as a binder resin, a solvent for dissolving the curable resin material, and the like. In addition, since the curable resin material contained in the ink of the color filter ink of the present invention is dissolved in a solvent, compared to the case where an ink in which the curable resin material is dispersed is used, The smoothness of the surface of the colored part to be formed can be improved.

  By the way, in the manufacture of a color filter by an ink jet method used in recent years, a colored portion corresponding to each color is formed by discharging and drying a plurality of colors of ink on a substrate. Such a method can reduce waste of the material for forming the colored portion (composition for forming the colored portion) compared to the photolithography method that has been widely used before that, thus reducing the burden on the environment. In addition, the manufacturing cost can be reduced. In addition, in the production of a color filter by an ink jet method, there is an advantage that it is easy to control the discharge position and the like of a droplet of a coloring portion forming material (coloring portion forming composition).

  In the manufacturing method of a color filter using an inkjet head, conventionally, a method of drying by heating or vacuum drying has been used to dry ink ejected on a substrate. When such a method is used, a phenomenon in which the ink undergoes thermal convection (Benard cell phenomenon) occurs due to the evaporation of the solvent from the outer surface of the ink in the cell. Further, due to heat distribution in the ink in the cell, the volatilization of the solvent in the ink tends to occur from a specific part of the cell. For this reason, the color filter ink in the cell does not have a uniform thickness and is likely to be uneven. When such a problem occurs, the colored portion to be formed cannot be made sufficiently flat, and when the obtained color filter is applied to an image display device, it causes liquid crystal alignment dripping. And the contrast ratio could not be made sufficient. The above-mentioned tendency is particularly remarkable when manufacturing a color filter (for example, a color filter having a diagonal length of 80 cm or more) used in a large liquid crystal display device.

  The present inventors pay attention to the state of the ejected ink in the drying process, and the change in the viscosity of the ink in the drying process and the dissolved state of the curable resin material contained in the ink are the surface of the colored portion to be formed We thought that it had an effect on the smoothness of the food and conducted intensive research. Therefore, the present inventors cured the ink so that the solubility of the curable resin material in the ink can be maintained even when the solid content in the ink becomes relatively high when the ink is dried. As a solvent for dissolving the conductive resin material, a plurality of kinds of components having different boiling points are included. However, simply using components having different boiling points as the solvent as described above cannot sufficiently increase the flatness of the surface of the colored portion to be formed. Therefore, in the present invention, a solvent containing a plurality of components having different boiling points is used as a solvent, and attention has been paid to the compatibility between the plurality of components and the curable resin material, leading to the present invention.

That is, in the present invention, the solvent contained in the color filter ink has a component x having a high compatibility with the curable resin material contained in the ink, a boiling point higher than the component x, and the component x And a component y having a higher compatibility with the curable resin material.
More specifically, the component x and the component y are expressed by the following formulas (I) to (IV) using a polar component and a hydrogen bond component in the solubility parameter (SP value) that is a compatibility index. Satisfied.

0.2 ≦ | SP _p (x) −SP _p (R) | ≦ 3 (I)
0.5 ≦ | SP _h (x) −SP _h (R) | ≦ 3 (II)
_{| SP p (y) -SP p} (R) | <| SP p (x) -SP p (R) | ... (III)
_{| SP h (y) -SP h} (R) | <| SP h (x) -SP h (R) | ... (IV)
However, SP _p (x) [(cal / cm ³ ) ^1/2 ] is a polar component of the solubility parameter of component x, and SP _h (x) [(cal / cm ³ ) ^1/2 ] is a component x. SP _p (y) [(cal / cm ³ ) ^1/2 ] is the polar component of the solubility parameter of component y, SP _h (y) [(cal / cm ³ ) ^1/2 ] is the hydrogen bonding component of the solubility parameter of component y, and SP _p (R) [(cal / cm ³ ) ^1/2 ] is the polar component of the solubility parameter of the curable resin material. , SP _h (R) [(cal / cm ³ ) ^1/2 ] represents a hydrogen bonding component in the solubility parameter of the curable resin material, respectively.

Incidentally, the solubility parameter (SP value) δ [(cal / cm ³ ) ^1/2 ] is used as an indicator of the compatibility and affinity of a plurality of substances, and is represented by the following formula (i): The three-dimensional solubility parameter of Hansen defined in (CM Hansen, J. Paint Techn., 39, 505, 104 (1967)) is calculated.

δ = (δ _d ² + δ _p ² + δ _h ² ) ^1/2 [(cal / cm ³ ) ^1/2 ] (i)
However, δ _d [(cal / cm ³ ) ^1/2 ] is a dispersion term (dispersion component) due to London's dispersion force (van der Waals force), and δ _p [(cal / cm ³ ) ^1/2 ] is a numerator. Polarity term due to polarity (polar component), δ _h [(cal / cm ³ ) ^1/2 ] is a hydrogen bond term due to hydrogen bond (hydrogen bond component). In addition, since how to obtain | require such 3 components (a dispersion | distribution component, a polar component, and a hydrogen bond component) is described in detail in Polymer Handbook (fourth edition), VII-698-711, it abbreviate | omits here.

The SP value obtained in this way is divided into three components: a dispersion component (δ _d ), a polar component (δ _p ), and a hydrogen bond component (δ _h ), as represented by the above formula (i). In general, the difference in solubility parameter between two substances is closely related to the energy required for the two substances to be compatible, and the smaller the difference in solubility parameter, the more necessary the two substances are to be compatible. Energy tends to be smaller.

By the way, the dispersion component (δ _d ) described above is a component that works in a system in which one of the two substances is dispersed in the other substance. Therefore, in a general SP value evaluation including a dispersion component as an ingredient, an accurate phase is obtained in a system in which two substances (a curable resin material and a solvent) are compatible with each other as in the color filter ink of the present invention. The solubility cannot be grasped.
Therefore, in the present invention, the compatibility between the curable resin material contained in the color filter ink and the component x and component y contained in the solvent is focused on the polar component and the hydrogen bonding component that are constituent components of the SP value. As the curable resin material, the component x, and the component y constituting the color filter ink, those satisfying the above-described conditions were used.

In the color filter ink of the present invention satisfying such conditions, the component x and the component y constituting the solvent can sufficiently dissolve the curable resin material as the binder resin. Aggregation of pigments and thickening phenomenon of ink are reliably prevented, and ink ejection stability is excellent over a long period of time.
And the color filter manufactured using such an ink for color filters becomes a thing by which the colored part formed is planarized. This can be explained as follows.

  That is, in the process of drying the ink ejected on the substrate, the low-boiling component x is preferentially evaporated from the ink. This increases the concentration of the component y in the ink. Since such a component y is a component having a much higher compatibility with the curable resin material than the component x, even if the content ratio of the solvent in the ink is relatively low, the curable resin material in the ink It can be held in a dissolved state. As a result, the fluidity of the ink is maintained even when the solid content concentration in the ink increases during the ink drying process. The color filter ink has a relatively high viscosity when a certain amount of solvent is removed, and the thermal convection of the ink in the cell is suppressed. As described above, when the colored portion is formed, the color filter ink has fluidity while suppressing the convection of the color filter ink for a relatively long time. It loses fluidity in a flat state and can solidify. As a result, the obtained colored portion is surely flattened, and the brightness and contrast ratio of the image display device to which such a color filter is applied are excellent.

On the other hand, when the above conditions are not satisfied, the excellent effects as described above cannot be obtained.
That is, when the solvent contained in the color filter ink is composed only of the component x as described above, when the ink is dried, the solvent content in the ink falls below a certain value. The curable resin material begins to precipitate. In such an ink, when a certain amount of solvent is removed, the viscosity rapidly increases and the fluidity of the ink is lost. It cannot be flat.

  In addition, when the solvent contained in the color filter ink is composed only of the component y as described above, even when the content ratio of the solvent in the ink is relatively low when the ink is dried, The curable resin material can be continuously dissolved in the ink. However, such an ink requires a long-time heat treatment to completely remove the solvent contained in the ink, and a material that forms the colored part (for example, a curable resin material) Etc.). As a result, the colored portion to be formed loses transparency, cracks, and the like, and the resulting color filter cannot have sufficient brightness. In addition, since such a component y is a relatively high-viscosity liquid, if the solvent in the ink is composed only of the component y, the ink discharge performance is poor.

As described above, in the color filter ink of the present invention, SP _p (x) [(cal / cm ³ ) ^1/2 ], which is the polar component of the solubility parameter of component x, and the solubility of the curable resin material. SP _p (R) [(cal / cm ³ ) ^1/2 ], which is a polar component of the parameters, satisfies the relationship 0.2 ≦ | SP _p (x) −SP _p (R) | ≦ 3. However, it is preferable that the relationship 0.4 ≦ | SP _p (x) −SP _p (R) | ≦ 1.0 is satisfied. As a result, the component x can sufficiently dissolve the curable resin material, and the curable resin material contained in the ink is more reliably dissolved in the solvent. Further, by including such a component x as a solvent and a component y that is more compatible with the curable resin material than the component x, the concentration of the curable resin material in the formed colored portion is the entire colored portion. It becomes more uniform with no unevenness. As a result, the obtained color filter has particularly excellent brightness and contrast ratio. In addition, since the concentration of the curable resin material is uniform throughout the formed colored part, the adhesion between the formed colored part and the substrate, and the impact resistance of the colored part are excellent, which is manufactured. The durability of the color filter is excellent.

Further, as described above, in the color filter ink of the present invention, SP _h (x) [(cal / cm ³ ) ^1/2 ], which is a hydrogen bonding component in the solubility parameter of the component x, and the curable resin SP _h (R) [(cal / cm ³ ) ^1/2 ], which is a hydrogen bonding component in the solubility parameter of the material, is 0.5 ≦ | SP _h (x) −SP _h (R) | ≦ 3 The relationship is satisfied, but it is preferable that the relationship 1.0 ≦ | SP _h (x) −SP _h (R) | ≦ 2 is satisfied. Such component x can sufficiently dissolve the curable resin material, and the curable resin material contained in the ink is more reliably dissolved in the solvent. Further, by including such a component x as a solvent and a component y that is more compatible with the curable resin material than the component x, the concentration of the curable resin material in the formed colored portion is the entire colored portion. It becomes more uniform with no unevenness. As a result, the obtained color filter has particularly excellent brightness and contrast ratio. In addition, since the concentration of the curable resin material is uniform throughout the formed colored part, the adhesion between the formed colored part and the substrate, and the impact resistance of the colored part are excellent, which is manufactured. The durability of the color filter is excellent.

Further, SP _p (y) [(cal / cm ³ ) ^1/2 ], which is a polar component of the solubility parameter of the component y, and SP _p (R, which is a polar component of the solubility parameter of the curable resin material. ) The value of [(cal / cm ³ ) ^1/2 ] is preferably 2 to 5 (cal / cm ³ ) ^1/2 , and ^{3 to} 4.5 (cal / cm ³ ) ^{1 / 2} is more preferable. Thereby, even when the content ratio of the solvent in the ink is sufficiently low when the ink is dried, the state in which the curable resin material is dissolved in the ink can be maintained. As a result, the fluidity of the ink is maintained until just before the drying of the ink is completed, and the surface of the colored portion to be formed becomes more flat. The brightness and contrast of the image display device to which such a color filter is applied. The ratio is particularly excellent.

Further, SP _h (y) [(cal / cm ³ ) ^1/2 ], which is a hydrogen bonding component of the solubility parameter of the component y, and SP, which is a hydrogen bonding component component of the solubility parameter of the curable resin material. _{The value of h} (R) [(cal / cm ³ ) ^1/2 ] is preferably ^{3 to} 8 (cal / cm ³ ) ^1/2 , and preferably 5.5 to 7.5 (cal / cm). More preferably, it is cm ³ ) ^1/2 . Thereby, even when the content ratio of the solvent in the ink is sufficiently low when the ink is dried, the state in which the curable resin material is dissolved in the ink can be maintained. As a result, the fluidity of the ink is maintained until just before the drying of the ink is completed, and the surface of the colored portion to be formed becomes more flat. The brightness and contrast of the image display device to which such a color filter is applied. The ratio is particularly excellent.

Further, SP _p (y) [(cal / cm ³ ) ^1/2 ], SP _p (R) [(cal / cm ³ ) ^1/2 ], SP _h (y) [(cal / cm ³ ) ^1/2 ] and SP _h (R) [(cal / cm ³ ) ^1/2 ] preferably satisfy the relationship of the following formula (V) and the following formula (VI).
| SP _p (y) −SP _p (R) | ≦ 1 (V)
_{| SP h (y) -SP h} (R) | ≦ 1 ... (VI)

Thereby, the compatibility between the curable resin material contained in the ink and the component y as a solvent is extremely high, and the curable resin material is surely dissolved in a relatively small amount of the component y. Accordingly, in the ink drying process, even when the content ratio of the solvent in the ink is sufficiently low, the state in which the curable resin material is dissolved in the ink (in the solvent) can be maintained for a longer period of time. As a result, the fluidity of the ink is maintained until just before the drying of the ink is completed, and the surface of the colored portion to be formed becomes more flat. The brightness and contrast of the image display device to which such a color filter is applied. The ratio is particularly excellent. More preferably, the relationship of | SP _p (y) −SP _p (R) | ≦ 0.7 and | SP _h (y) −SP _h (R) | ≦ 0.7 is satisfied. Thereby, the effects as described above are more remarkably exhibited.

Further, SP _p (x) [(cal / cm ³ ) ^1/2 ], SP _p (y) [(cal / cm ³ ) ^1/2 ], and SP _p (R) [(cal / cm ³ ) ^1/2 ] satisfies the relationship of | SP _p (x) −SP _p (R) | − | SP _p (y) −SP _p (R) |> 0, but | SP _p (x _{) -SP p (R) | -} | SP p (y) -SP p (R) | is preferable to satisfy the relation of _{≧ 0.1, | SP p (x} ) -SP p (R) | - | _{SP p (y) -SP p (} R) | is more preferable to satisfy the relationship of ≧ 0.2. Thereby, at the time of forming the colored portion, the convection of the color filter ink is suppressed for a longer time, and the fluidity of the color filter ink is maintained. Thereby, the colored part obtained is more reliably flattened.

Further, SP _h (x) [(cal / cm ³ ) ^1/2 ], SP _h (y) [(cal / cm ³ ) ^1/2 ], and SP _h (R) [(cal / cm ³ ) ^1/2 ] satisfies the relationship | SP _h (x) −SP _h (R) | − | SP _h (y) −SP _h (R) |> 0, but | SP _h (x _{) -SP h (R) | -} | SP h (y) -SP h (R) | is preferable to satisfy the relationship of _{≧ 0.5, | SP h (x} ) -SP h (R) | - | It is more preferable to satisfy the relationship of SP _h (y) −SP _h (R) | ≧ 1.3. Thereby, at the time of forming the colored portion, the convection of the color filter ink is suppressed for a longer time, and the fluidity of the color filter ink is maintained. Thereby, the colored part obtained is more reliably flattened.

In addition, the color filter ink of the present invention has, as a solvent, a component x having different boiling points and a component y having a higher boiling point than the component x, but the boiling point of the component x under atmospheric pressure is T _bp (X) [° C.] When the boiling point of the component y under atmospheric pressure is T _bp (y) [° C.], it is preferable that 15 ≦ T _bp (y) −T _bp (x) ≦ 70, ≦ T _bp (y) −T _bp (x) ≦ 60 is more preferable, and 25 ≦ T _bp (y) −T _bp (x) ≦ 50 is more preferable. Thereby, at the time of forming the colored portion, the convection of the color filter ink is suppressed for a longer time and the fluidity of the color filter ink is maintained. As a result, the color filter ink in the cell loses fluidity and solidifies in a state where the surface is flatter, so that the surface of the colored portion to be formed can be more reliably flattened. In addition, among multiple color inks that are used in the production of color filters that display full-color images, the content of the colorant and binder resin (curable resin material) contained in the ink is different for each color. It is common to be different. As described above, even when the solid contents contained in the inks of the respective colors are different from each other, the component x and the component y contained as the solvent satisfy the above-described conditions, so that the inks of the respective colors are used. All of the colored portions to be formed have their surfaces reliably flattened under the same drying conditions.

Hereinafter, the constituent material of the color filter ink of the present invention will be described in detail.
<Colorant>
The color filter usually has different colored portions (generally, three colors corresponding to RGB). The colorant is usually selected according to the color tone of the colored portion to be formed. As a colorant constituting the color filter ink, for example, various pigments and various dyes can be used.

  Examples of the pigment include C.I. I. Pigment Red 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 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 Green 7, 36, 15, 17, 18, 19, 26, 50, 58; I. Pigment blue 1,15,15: 1,15: 2,15: 3,15: 4,15: 6, 17: 1,18,60,27,28,29,35,36,60,80; I. Pigment Yellow 1, 3, 12, 13, 14, 15, 16, 17, 20, 24, 31, 34, 35, 35: 1, 37, 37: 1, 42, 43, 53, 55, 60, 61, 65, 71, 73, 74, 81, 83, 93, 94, 95, 97, 98, 100, 101, 104, 106, 108, 109, 110, 113, 114, 116, 117, 119, 120, 126, 127, 128, 129, 138, 139, 150, 151, 152, 153, 154, 155, 156, 157, 166, 168, 175, 180, 184, 185; I. Pigment violet 1, 3, 14, 16, 19, 23, 29, 32, 36, 38, 50; C.I. 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 brown 7, 11, 23, 25, 33; I. Pigment Black 1 and 7 and derivatives thereof may be used, and one or more selected from these may be used in combination.

When the color filter ink is a pigment containing a pigment as a colorant (pigment ink), the color filter to be manufactured has superior light resistance and the like compared to a pigment containing a dye as a colorant (dye ink). be able to.
In particular, the color filter ink is used as a pigment (red pigment) as C.I. I. Pigment red 177 and its derivatives, and / or C.I. I. When the pigment red 254 and derivatives thereof are included, the color developability of the color filter ink (red color filter ink) can be made particularly excellent. In addition, the effect of using in combination with a dispersant and a curable resin material (curable resin composition) as described in detail later is more remarkably exhibited, and the dispersion stability of the pigment particles in the color filter ink is excellent. Can be. As a result, an increase in thixotropic property of the color filter ink at the time of forming the colored portion can be suppressed, and the discharge stability of the color filter ink is particularly excellent when the ink is applied to the cells. be able to.

  C. I. Pigment Red 177 derivatives, C.I. I. When the pigment red 254 derivative contains a compound (derivative) represented by the following formula (2) or the following formula (3), the above-described effects are more remarkably exhibited.

  In particular, the color filter ink is used as a pigment (green pigment). I. When it contains CI Pigment Green 58 (brominated zinc phthalocyanine pigment), the color developability of the color filter ink (green color filter ink) can be made particularly excellent. In addition, C.I. I. Although Pigment Green 58 has a feature of excellent brightness, conventionally, it has been a very difficult material to stably disperse. However, the inventor has disclosed C.I. I. It has been found that even when Pigment Green 58 is included, the dispersion stability in the color filter ink can be improved by simultaneously including a sulfonated pigment derivative as a sub-pigment. As a result, the color developability of the color filter ink can be further improved, and the increase in thixotropic property of the color filter ink due to the high concentration of the pigment when forming the colored portion can be suppressed. Can do. In addition, the long-term storage stability of the pigment in the color filter ink and the discharge stability of the color filter ink can be made particularly excellent.

  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 (4). Thereby, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent, and an image with a better contrast can be displayed on the manufactured color filter.

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-mentioned 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 tends to aggregate 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 (4) 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 (4) 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 (4) 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. Pigment derivatives (sulfonated pigment derivatives) having moderate affinity for CI Pigment Green 58 (brominated phthalocyanine) are 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 is excellent in dispersibility in a solvent described later. The above is considered to act synergistically and to obtain the very excellent effects as described above.

  C. I. When the pigment green 58 and the pigment derivative (sulfonated pigment derivative) as described above are included, the content of the pigment derivative (sulfonated pigment derivative) in the color filter 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. Thereby, the dispersion stability of the pigment particles in the color filter ink can be made excellent. Further, the contrast ratio and brightness of the manufactured color filter can be made particularly excellent.

In particular, the color filter ink is used as a pigment (blue pigment). I. If it contains CI Pigment Blue 15: 6, the color developability of the color filter ink (blue color filter ink) can be made particularly excellent. In addition, the dispersion stability of the pigment particles in the color filter ink can be made particularly excellent.
When the color filter ink is a pigment containing a pigment as a colorant (pigment ink), the average particle diameter of the pigment is preferably 10 to 200 nm, and more preferably 20 to 180 nm. As a result, the durability (light resistance) of the color filter manufactured using the color filter ink while sufficiently improving the dispersion stability of the pigment in the color filter ink and the discharge stability of the color filter ink. Etc.) can be made sufficiently excellent, and the color developability, contrast, etc. in the color filter can be made particularly excellent.

  Examples of the dye include azo dyes, anthraquinone dyes, condensed polycyclic aromatic carbonyl dyes, indigoid dyes, carbonium dyes, phthalocyanine dyes, methine, and polymethine dyes. Specific examples of the dye include C.I. I. Direct Red 2, 4, 9, 23, 26, 28, 31, 39, 62, 63, 72, 75, 76, 79, 80, 81, 83, 84, 89, 92, 95, 111, 173, 184 207, 211, 212, 214, 218, 221, 223, 224, 225, 226, 227, 232, 233, 240, 241, 242, 243, 247; I. Acid Red 35, 42, 51, 52, 57, 62, 80, 82, 111, 114, 118, 119, 127, 128, 131, 143, 145, 151, 154, 157, 158, 211, 249, 254 257, 261, 263, 266, 289, 299, 301, 305, 319, 336, 337, 361, 396, 397; I. Reactive Red 3, 13, 17, 19, 21, 22, 23, 24, 29, 35, 37, 40, 41, 43, 45, 49, 55; I. B. Basic Red 12, 13, 14, 15, 18, 22, 23, 24, 25, 27, 29, 35, 36, 38, 39, 45, 46; I. Direct violet 7, 9, 47, 48, 51, 66, 90, 93, 94, 95, 98, 100, 101; I. Acid Violet 5, 9, 11, 34, 43, 47, 48, 51, 75, 90, 103, 126; I. Reactive violet 1,3,4,5,6,7,8,9,16,17,22,23,24,26,27,33,34; I. B. Basic violet 1, 2, 3, 7, 10, 15, 16, 20, 21, 25, 27, 28, 35, 37, 39, 40, 48; I. Direct yellow 8, 9, 11, 12, 27, 28, 29, 33, 35, 39, 41, 44, 50, 53, 58, 59, 68, 87, 93, 95, 96, 98, 100, 106, 108, 109, 110, 130, 142, 144, 161, 163; I. Acid Yellow 17, 19, 23, 25, 39, 40, 42, 44, 49, 50, 61, 64, 76, 79, 110, 127, 135, 143, 151, 159, 169, 174, 190, 195 196, 197, 199, 218, 219, 222, 227; I. Reactive Yellow 2, 3, 13, 14, 15, 17, 18, 23, 24, 25, 26, 27, 29, 35, 37, 41, 42; I. Basic yellow 1, 2, 4, 11, 13, 14, 15, 19, 21, 23, 24, 25, 28, 29, 32, 36, 39, 40; I. Acid Green 16; C.I. I. Acid Blue 9, 45, 80, 83, 90, 185; C.I. I. Basic oranges 21, 23 and the like can be mentioned, and one or more selected from these can be used in combination.

  The content of the colorant in the color filter ink is preferably 2 to 25 wt%, and more preferably 3 to 20 wt%. When the content of the colorant is a value within the above range, the discharge property (discharge stability) from the droplet discharge head (inkjet head) for the color filter is particularly excellent, and the produced color filter The durability can be improved. Further, a sufficient color density can be secured in the manufactured color filter.

<Solvent>
The solvent has a function of dissolving the curable resin material in the color filter ink. Such a solvent also has a function of dissolving and / or dispersing the colorant as described above. Usually, most of the solvent constituting the color filter ink is removed in the process of producing the color filter.

  In the present invention, such a solvent contains a component x having different boiling points and a component y having a higher boiling point than the component x and higher compatibility with the curable resin material described later than the component x. It is a waste. When the solvent constituting the color filter ink contains such a component, the formed colored portion is surely flattened, and the produced color filter has excellent brightness and contrast ratio. Become.

(Component x)
As the component x contained in the color filter ink, for example, an ester compound, an ether compound, a hydroxyketone, a carbonic acid diester, a cyclic amide compound, or the like can be used. Among them, (1) a polyhydric alcohol (for example, ethylene glycol, Ethers (polyhydric alcohol ethers) as condensates of propylene glycol, butylene glycol, glycerin, etc., alkyl ethers of polyhydric alcohol ethers (eg, methyl ether, ethyl ether, butyl ether, hexyl ether, etc.), esters (eg, Formate, acetate, propionate, etc.), (2) esters of polyvalent carboxylic acids (eg, succinic acid, glutaric acid, etc.) (eg, methyl esters), (3) at least one hydroxyl group and at least one carboxy in the molecule Ether of a compound having a group (hydroxy acid), esters and the like, (4) a polyhydric alcohol and a carbonic acid diester having a chemical structure as obtained in the reaction with phosgene is preferred. Examples of compounds that can be used as component x include tripropylene glycol dimethyl ether, dipropylene glycol dimethyl ether, dipropylene glycol isopropyl methyl ether, diethylene glycol butyl methyl ether, diethylene glycol diethyl ether, ethyl octoate, diethylene glycol ethyl methyl ether, and dipropylene. Glycol methyl ether acetate, triethylene glycol dimethyl ether, 3-methoxybutyl acetate (methace), dichlorohexanol acetate, propylene glycol acetate, diethylene glycol dimethyl ether, 1,3-butylene glycol diacetate, 2-ethylhexanol, dipropylene glycol n-butyl ether ,Guru Dimethyl succinate, dimethyl succinate, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether acetate, 1-butoxy-2-propanol, diethylene glycol monomethyl ether, dipropylene glycol monomethyl ether, 3-methoxy-n-butyl acetate, diacetin, dipropylene glycol n-propyl ether, polyethylene glycol monomethyl ether, butyl glycolate, ethylene glycol monohexyl ether, N-methyl-2-pyrrolidone, triethylene glycol butyl methyl ether, bis (2-propoxyethyl) ether, diethylene glycol diacetate, diethylene glycol butyl Ethyl ether, diethylene glycol butyl propyl ether, die Lenglycol 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 group Examples include recall-2-ethylhexyl ether, triethylene glycol monoethyl ether, diethylene glycol monohexyl ether, triethylene glycol monobutyl ether, diethylene glycol mono-2-ethylhexyl ether, or tripropylene glycol n-butyl ether.

  In particular, the component x constituting the solvent is diethylene glycol monobutyl ether acetate (BCA), 1,3-butylene glycol diacetate (1,3-BGDA), dipropylene glycol methyl ether acetate (DPMA), propylene recall diacetate (PGDA). ) Or ethylene glycol monobutyl ether acetate (BMGA) is more preferable. Such components have moderate boiling points, are highly polar, and efficiently hydrogen bond. Thereby, the curable resin material contained in the ink is more reliably dissolved in the solvent, and the fluidity of the ink when the ink is dried can be maintained for a longer time. Thereby, the surface of the colored part to be formed is more reliably flattened.

  The boiling point of component x under atmospheric pressure (1 atm) is preferably 150 to 235 ° C, more preferably 160 to 220 ° C, and further preferably 170 to 215 ° C. When the boiling point of the component x is a value within the above range, the ink ejected on the substrate is more suitably increased in viscosity during the drying process. Thereby, the convection of the ink in a cell is suppressed more efficiently, and the surface of each coloring part formed is more reliably planarized.

  The viscosity of component x at 25 ° C. is not particularly limited, but is preferably 0.5 to 5.0 mPa · s, and more preferably 1.0 to 4.0 mPa · s. When the viscosity of the component x is a value within the above range, the ejection amount of each ink ejected from the droplet ejection head is further stabilized. Further, clogging or the like in the droplet discharge head that discharges the color filter ink can be more effectively prevented, and the productivity of the color filter can be made particularly excellent. In addition, the measurement of a viscosity can be performed using a vibration type viscometer, for example, and can be especially performed based on JISZ8809.

  Moreover, it is preferable that the vapor pressure of the component x is higher than the vapor pressure of the component y at the drying temperature of the ink discharged onto the substrate. Thereby, even when the ink is dried at a relatively low drying temperature, the component x contained in the ejected ink evaporates more preferentially than the component y. Thereby, the surface of the colored part to be formed can be surely made flat.

  Further, the vapor pressure at 25 ° C. of such component x is preferably 0.02 mmHg or more, more preferably 0.03 to 3.0 mmHg, and 0.05 to 2.0 mmHg. Further preferred. When the vapor pressure of the component x is a value within the above range, the ink ejected onto the substrate is more suitably increased in viscosity during the drying process. Thereby, the convection of the ink in a cell is suppressed more efficiently, and the surface of each coloring part formed is more reliably planarized. Further, clogging or the like in the droplet discharge head that discharges the color filter ink can be more effectively prevented, and the productivity of the color filter can be made particularly excellent.

  The content of the component x contained in the solvent constituting the color filter ink is preferably 70 to 98 wt%, and more preferably 80 to 97 wt%. This suppresses convection of the color filter ink for a longer time when forming the colored portion, and maintains the fluidity of the color filter ink. As a result, the color filter ink in the cell loses fluidity and solidifies in a state where the surface is flatter, so that the surface of the colored portion to be formed can be more reliably flattened. Further, the discharge property (discharge stability) from the droplet discharge head for the color filter can be made particularly excellent. Further, a sufficient color density can be secured in the manufactured color filter.

(Component y)
As the component y contained in the color filter ink, for example, an ester compound, an ether compound, a hydroxyketone, a carbonic acid diester, a cyclic amide compound, or the like can be used. Among them, (1) a polyhydric alcohol (for example, ethylene glycol, Propylene glycol, butylene glycol, glycerin, or condensates thereof), polyhydric alcohol alkyl ethers (eg, methyl ether, ethyl ether, butyl ether, hexyl ether, etc.), esters (eg, formate, acetate, propionate, etc.), (2) ester (for example, methyl ester) of polyvalent carboxylic acid (for example, succinic acid, glutaric acid), (3) compound having at least one hydroxyl group and at least one carboxyl group in the molecule (hydroxy acid) D) Ether, ester or the like, (4) a polyhydric alcohol and a carbonic acid diester having a chemical structure as obtained in the reaction with phosgene is preferred. Examples of the compound that can be used as component y include ethylene glycol dibutyrate, polyethylene glycol (PEG), diethylene glycol mono-2-ethylhexyl ether, polyethylene glycol monomethyl ether (MPG), tripropylene glycol butyl ether, and 1,3-butylene. Glycol diacetate, triethylene glycol monobutyl ether, diethylene glycol monohexyl ether, triacetin, ethylene glycol-2-ethylhexyl ether, 4-methyl-1,3-dioxolan-2-one, diethylene glycol monoethyl ether acetate, propylene glycol phenyl ether, Diethylene glycol monobutyl ether acetate, triethylene glycol monomethyl ether Ter (MTG), diethylene glycol monobutyl ether, dimethyl glutamate, dipropylene glycol butyl ether, dipropylene glycol propyl ether, tripropylene glycol monomethyl ether, diethylene glycol monomethyl ether, 2- (2-methoxy-1-methylethoxy) -1-methyl Ethyl acetate, triethylene glycol dimethyl ether, triethylene glycol diacetate, bis (2-butoxyethyl) ether, dimethyl glutarate, tetraethylene glycol dimethyl ether, 1,6-diacetoxyhexane, butoxypropanol, dipropylene glycol dimethyl ether, diethylene glycol dimethyl ether , Ethyl 3-ethoxypropionate, diethylene glycol Tylmethyl ether, 3-methoxybutyl acetate, diethylene glycol diethyl ether, ethyl octoate, ethylene glycol monobutyl ether acetate, cyclohexyl acetate, diethyl succinate, ethylene glycol diacetate, propylene glycol diacetate, dimethyl succinate, or 4-hydroxy- 4-methyl-2-pentanone etc. are mentioned.

  Among these components, polyhydric alcohols or alkyl ethers of polyhydric alcohols are preferable. Such components have moderate boiling points, are highly polar, and efficiently hydrogen bond. Thereby, even if the content ratio of the solvent in the ink is relatively low, the curable resin material can be more reliably dissolved in the ink. As a result, the fluidity of the ink is maintained for a relatively long time. As a result, the flatness of the surface of the colored portion to be formed is particularly excellent.

  Further, such a component has an effect of reducing the thixotropic property of the color filter ink. Therefore, when the color filter ink contains these components as a solvent, the concentration of solids (pigments, curable resin material) in the ink increases in the process of drying the ink discharged onto the substrate. However, the fluidity of the ink is more reliably maintained. As a result, the surface of the colored portion to be formed can be flattened more reliably, and the brightness and contrast ratio of the finally obtained color filter can be made particularly high.

Moreover, as such polyhydric alcohols or alkyl ethers of polyhydric alcohols, for example, oligomers of diol compounds can be used, and specifically, oligomers of glycols are preferable. Such a compound can easily reduce the thixotropic property of the color filter ink, and can more reliably suppress convection in the cell of the color filter ink when the colored portion is formed.
As such a polyhydric alcohol ether or an alkyl ether of the polyhydric alcohol ether, polyethylene glycol (PEG), polyethylene glycol monomethyl ether (MPG), or triethylene glycol monomethyl ether (MTG) is particularly preferable.

  Moreover, it is preferable that the polymerization degree of the polyhydric alcohol in such a polyhydric alcohol ether or the alkyl ether of a polyhydric alcohol is 3-40, and it is more preferable that it is 3-20. Thereby, the thixotropic property of the color filter ink can be sufficiently reduced, and the convection of the color filter ink in the cell can be suppressed when the colored portion is formed.

  Moreover, it is preferable that the molecular weight of such a compound is 150-2000, It is more preferable that it is 180-1000, It is further more preferable that it is 180-500. Thereby, the thixotropic property of the color filter ink can be sufficiently reduced, and the convection of the color filter ink in the cell can be more reliably suppressed during the formation of the colored portion.

  The boiling point of component y under atmospheric pressure (1 atm) is preferably 200 to 360 ° C, more preferably 210 to 330 ° C, and further preferably 220 to 280 ° C. Thereby, it can hold | maintain in the state which dissolved the curable resin material in the ink more reliably. As a result, the fluidity of the ink is maintained for a relatively long time. As a result, the flatness of the surface of the colored portion to be formed is particularly excellent.

  The viscosity of component y at 25 ° C. is not particularly limited, but is preferably 1.5 to 6.0 mPa · s, and more preferably 2.0 to 4.0 mPa · s. When the viscosity of the component y is a value within the above range, the ejection amount of each ink ejected from the droplet ejection head is further stabilized. Further, clogging or the like in the droplet discharge head that discharges the color filter ink can be more effectively prevented, and the productivity of the color filter can be made particularly excellent.

  Further, the vapor pressure at 25 ° C. of the component y is preferably 0.15 mmHg or less, more preferably 0.10 mmHg or less, and further preferably 0.05 mmHg or less. When the vapor pressure of component y is a value within the above range, the curable resin material can be more reliably dissolved in the ink even when the solvent content in the ink is relatively low. it can. As a result, the fluidity of the ink is maintained for a relatively long time. As a result, the flatness of the surface of the colored portion to be formed is particularly excellent.

  The content of the component y contained in the solvent constituting the color filter ink is preferably 2 to 30 wt%, and more preferably 3 to 20 wt%. This suppresses convection of the color filter ink for a longer time when forming the colored portion, and maintains the fluidity of the color filter ink. As a result, the color filter ink in the cell loses fluidity and solidifies in a state where the surface is flatter, so that the surface of the colored portion to be formed can be more reliably flattened. Further, the discharge property (discharge stability) from the droplet discharge head for the color filter can be made particularly excellent. Further, a sufficient color density can be secured in the manufactured color filter.

Further, when the content rate of the component x contained in the color filter ink is X [wt%] and the content rate of the component y is Y [wt%], it is preferable that 2 ≦ X / Y ≦ 30, More preferably, 4 ≦ X / Y ≦ 28, and even more preferably 5 ≦ X / Y ≦ 20. Thereby, when ink is dried, the thermal convection of the ink in the cell is further suppressed, and the ink retains fluidity for a longer time. As a result, the color filter ink in the cell loses fluidity and solidifies in a state where the surface is flatter, so that the surface of the colored portion to be formed can be more reliably flattened. Further, the discharge property (discharge stability) from the droplet discharge head for the color filter can be made particularly excellent. Further, a sufficient color density can be secured in the manufactured color filter.
Further, the solvent contained in the color filter ink may contain a component other than the component x and the component y as described above. When such a component is included, the total content of the component x and the component y contained in the solvent constituting the color filter ink is preferably 99 wt% or more. As a result, the effects as described above become significant.

[Curable resin material]
The color filter ink of the present invention contains a curable resin material as a binder resin. Thereby, the ink for color filters can improve the adhesiveness with respect to the board | substrate of the coloring part formed. In addition, it is possible to prevent adverse effects due to chemical application and cleaning in the subsequent step of the ink application step by the ink jet method.

The curable resin material is generally excellent in adhesion to the substrate after curing. Therefore, the durability of the color filter can be improved by using a curable resin material as the binder resin.
The curable resin is not particularly limited. For example, various thermosetting resins, energy ray curable resins such as photocurable resins, and the like can be used, but the following curable resin materials are included. Is preferred. In general, when a large amount of curable resin material is included in the ink, the viscosity tends to be high, and the droplet ejection stability is not easily improved. Further, when the colored portion is formed, the fluidity of the color filter ink is likely to be lowered by removing the solvent in the color filter ink. However, when the following materials are used as the curable resin material, the ink is prevented from increasing in viscosity even when a relatively large amount of the curable resin material is included. Further, when forming the colored portion, the fluidity of the color filter ink can be maintained for a relatively long time. In addition, the obtained color filter is particularly excellent in durability.

Hereinafter, a curable resin material (curable resin composition) that can be suitably used for the color filter ink will be described in detail.
[Polymer A]
The polymer A contains at least an epoxy group-containing vinyl monomer a1 as a monomer component. The polymer A may be substantially composed of a single compound, or may be a mixture of a plurality of types of compounds. However, when the polymer A is a mixture of a plurality of types of compounds, each compound 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, such a curable resin containing the poxy group-containing vinyl monomer a1 is suitably dissolved in the solvent containing the component x and the component y as described above, and the fluidity of the ink when the ink is dried. It can be prevented over a long period of time. Therefore, the surface of the colored part obtained can be flattened more reliably. Further, by containing the epoxy group-containing vinyl monomer a1 as a monomer component, the polymer A is prevented from being unintentionally cured during storage of the color filter ink and when ink is applied to the cells. The Further, the long-term storage stability and ejection stability of the color filter ink can be made particularly excellent. Moreover, the colored part formed using the ink for color filters can be made especially excellent in solvent resistance by containing the epoxy-group-containing vinyl monomer a1 as a monomer component. Further, by containing the epoxy group-containing vinyl monomer a1 as a monomer component, the curable resin material is cured under relatively mild conditions when forming the colored portion using the color filter ink. It is useful for improving the hardness and the like of the colored portion to be formed. In addition, when the polymer A includes 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 (5) can be used. When the epoxy group-containing vinyl monomer a1 has such a structure, the effects as described above can be more remarkably obtained, and the compatibility between the polymer A and the polymer B described later is particularly improved. It can be made excellent, and the transparency of the colored portion formed using the color filter ink can be made particularly high.

In formula (5), examples of the alkyl group having 1 to 7 carbon atoms represented by R ⁶ include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, s-butyl, t-butyl, pentyl, hexyl, heptyl group An alkyl group such as 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 polymer A is more reliably prevented from unintentionally curing when the color filter ink is stored and when ink is applied to the cells. Further, the long-term storage stability and ejection stability of the 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 coloring part formed using the ink for color filters can be made excellent. Further, the compatibility between the polymer A and the polymer B described later can be made particularly excellent, and the transparency of the colored portion formed using the color filter ink can be made extremely high. it can.

In formula (5), a divalent hetero atom represented by G may be contained. As typical examples of the hydrocarbon group, a linear or branched alkylene group, more specifically, for example, methylene, ethylene, propylene, tetramethylene, ethylethylene, pentamethylene, hexamethylene, oxymethylene, Examples include 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 (5-1) to (5-31), 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 polymer A can acquire the effect as mentioned above more notably.

In formulas (5-1) to (5-31), 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 divalent hydrocarbon group having 1 to 20 carbon atoms. 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 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 polymer A is preferably dissolved in the solvent containing the component x and the component y as described above, and at the time of drying the ink. In addition, it is possible to prevent the fluidity of the ink from deteriorating over a long period of time. Therefore, the surface of the colored part obtained can be flattened more reliably. In addition, the polymer A is more reliably prevented from being unintentionally cured when the color filter ink is stored or when ink is applied to the cells. Further, the long-term storage stability and ejection stability of the color filter ink can be made particularly excellent. Further, when the content of the epoxy group-containing vinyl monomer a1 in the polymer A is a value within the above range, it is cured under relatively mild conditions when forming the colored portion using the color filter ink. The resin material can be cured and the hardness, solvent resistance, and the like of the colored portion to be formed can be made particularly excellent.

  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 color filter ink (dissolved gas, bubbles present as microbubbles, etc.) can be reduced more effectively, and the droplet discharge stability by the ink jet method is particularly excellent. It will be a thing. In addition, since there are few air bubbles contained in the color filter ink, it is possible to prevent bursting of the air bubbles in the color filter ink when the colored portion is formed, and to make the colored portion particularly flat. As a result, the manufactured color filter has particularly excellent brightness and contrast ratio.

Examples of the polymerizable vinyl monomer a2 include a (meth) acryloyl group such as 2-acryloyloxyethyl isocyanate (manufactured by Showa Denko KK, trade name “Karenz MOI”), 2-methacryloyloxyethyl isocyanate, and the like. (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 gas content in the color filter ink while sufficiently improving the long-term storage stability of the color filter ink and the like. (Dissolved gas, bubbles present as microbubbles, etc.) can be reduced more effectively, and the stability of droplet ejection by the ink jet method is particularly excellent. Moreover, the transparency of the colored part formed using the color filter ink can be made sufficiently high.

  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). As a result, the adhesion of the colored portion formed using the color filter ink to the substrate, particularly the adhesion when repeatedly exposed to a rapid temperature change accompanying image display, is particularly excellent. it can. 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 formed using the color filter ink 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 products 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 color filter ink is manufactured using the color filter ink while sufficiently improving the long-term storage stability of the color filter ink. The durability of the color filter can be made particularly excellent. Moreover, the transparency of the colored part formed using the color filter ink can be increased. In addition, the ejection stability of ink droplets is particularly excellent.

  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, 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.

Although the ratio (content rate) of the polymer A in the curable resin material is not particularly limited, it 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.
The weight average molecular weight of the polymer A is preferably 1000 to 50000, more preferably 1200 to 10000, and further preferably 1500 to 5000. When the weight average molecular weight of the polymer A is in such a relatively low range, a decrease in ink fluidity during ink drying can be suppressed for a longer time.

[Polymer B]
In the color filter ink, the curable resin material may include a polymer B containing at least an alkoxysilyl group-containing vinyl monomer b1 represented by the following formula (1) as a monomer component. preferable.

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.
Since such a polymer B contains an alkoxysilyl group, it has a high affinity with a substrate (particularly a glass substrate) that supports the colored portion of the color filter. For this reason, when the ink contains the polymer B as the curable resin material, the ink ejected onto the substrate can suitably spread on the substrate, and the resulting colored portion has a particularly uniform thickness. It can be. That is, the colored portion can be made flatter. For this reason, the obtained color filter is excellent in brightness and contrast ratio. Moreover, since the polymer B has high affinity with respect to a board | substrate, the coloring part of the color filter obtained can make the adhesiveness with respect to a board | substrate especially excellent. Moreover, by having such a polymer B, the hardening of the polymer A can be supplemented, and the colored portion can be formed under relatively mild conditions, and the hardness and light resistance of the formed colored portion can be formed. The heat resistance and the like can be made sufficiently excellent.

(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, the curing of the polymer A is performed when the curable resin material (curable resin composition) is cured to form a colored portion. The colored portion can be formed under relatively mild conditions, and the formed colored portion has sufficient hardness, adhesion to the substrate, light resistance, heat resistance, etc. 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 methyl, ethyl, propyl, isopropyl, butyl, isobutyl, s-butyl, t-butyl, pentyl, hexyl, heptyl group An alkyl group such as 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 ink droplets can be made particularly excellent. 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. Further, the compatibility between the polymer A and the polymer B can be made particularly excellent, and the transparency of the colored portion formed using the color filter ink can be made particularly high.

  In the formula (1), as a typical 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 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, t-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, t- Examples include butoxy, pentoxy, hexyloxy groups and the like.

  Specific examples of the monomer represented by the formula (1) include, for example, 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 polymer synthesis) 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 a value within the above range, the curable resin material (curable resin composition) is cured to form a colored portion. Curing of the polymer A can be effectively compensated, and the colored part can be formed under milder conditions. Moreover, the uniformity of the shape of the colored part to be formed, hardness, adhesion to the substrate, light resistance, heat resistance, and the like can be made particularly excellent. When the polymer B is a mixture of a plurality of types of compounds, 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 a 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 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 discharge stability of the color filter ink and the durability of the color filter produced using the color filter ink can be made particularly excellent.

The ratio (content ratio) of the polymer B in the curable 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 weight average molecular weight of the polymer B is preferably 1000 to 50000, more preferably 1200 to 10000, and further preferably 1500 to 5000. Thus, the color filter ink has particularly excellent affinity for the substrate, and the ink can quickly spread on the substrate.

  Further, when the polymer A and the polymer B are included as the curable resin material, the ratio of the content ratio of the polymer A and the content ratio of the polymer B is 25:75 to 75:25 by weight ratio. It is preferable that the ratio is 45:55 to 55:45. By satisfying these conditions, the color filter ink can be suitably wet spread on the glass substrate when ink is applied to the cell, and the fluidity of the ink is longer when forming the colored portion. Retained. Further, the discharge stability of the color filter ink can be made particularly excellent. In addition, color filters manufactured using color filter inks can more reliably prevent color unevenness and density unevenness at each part, and are particularly excellent in uniformity of characteristics among individuals. It can be. Further, the durability of the color filter can be made particularly excellent.

[Polymer C]
The curable resin material (curable resin composition) further includes a polymer C containing a fluoroalkyl group- or fluoroaryl group-containing vinyl monomer c1 represented by the following formula (6) as a monomer component. May be included.

By including such a polymer C, the discharge stability of the color filter ink can be made particularly excellent. In particular, the liquid breakage from the nozzle of the droplet discharge head is improved. Further, the heat resistance of the colored portion formed using the color filter ink 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 (6) 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 color filter ink can be made particularly excellent. In particular, the ink drainage from the nozzle can be made particularly excellent. Further, the heat resistance of the colored portion formed using the color filter ink 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 formula (6), examples of the alkyl group having 1 to 7 carbon atoms represented by R ⁵ include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, s-butyl, t-butyl, pentyl, hexyl, and heptyl groups. An alkyl group such as 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 color filter ink and the heat resistance of the colored portion formed using the color filter ink can be made particularly excellent.

  In the formula (6), 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 (6) 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 discharge stability of the color filter ink can be made particularly excellent. In particular, the ink drainage from the nozzle can be made particularly excellent. The heat resistance of the colored portion formed using the color filter ink can be made particularly excellent. Further, the compatibility of the polymer C with the polymer A or the polymer B can be made particularly excellent, and the transparency of the colored portion formed using the color filter ink should be made particularly high. Can do.

  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 (made 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 (such as Daicel Chemical Industries' Plaxel FA series, Plaxel FM series), 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, and phenylethyl (meth) acrylate Examples thereof include alkyl, aralkyl (meth) acrylates; 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. In addition, when the polymer C is a mixture of a plurality of kinds of compounds, the content of the polymerizable vinyl monomer c2 is a weighted average value (weighted average value based on the weight ratio) for these compounds. Can be adopted. Moreover, 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-described conditions for each compound.

When the curable resin material contains the polymer C, the ratio (content ratio) of the polymer C in the curable resin material is not particularly limited, but is preferably 1 to 20 wt%, and 2 to 15 wt%. Is preferred. 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.
The weight average molecular weight of the polymer C is preferably 1000 to 50000, more preferably 1200 to 10000, and still more preferably 1500 to 5000. Thereby, in the color filter ink, the polymer C becomes relatively easy to flow, and the decrease in the fluidity of the color filter ink at the time of forming the colored portion can be suppressed for a longer time.

  Further, when the curable resin material contains the polymer C, the ratio of the content ratio of the polymer A and the content ratio of the polymer C is preferably 50:50 to 99: 1 by weight ratio, More preferably, the ratio is 60:40 to 98: 2. By satisfying such conditions, the dispersion stability of the pigment in the color filter ink and the discharge stability of the color filter ink are particularly excellent, and the color unevenness and density unevenness in each part of the color filter are reduced. It can be prevented more effectively, and the uniformity of characteristics among individuals can be made particularly excellent, and the durability of the color filter can be made particularly excellent.

  The content of the curable resin material in the color filter ink is preferably 0.5 to 10 wt%, and more preferably 1 to 5 wt%. When the content of the curable resin material is a value within the above range, the color filter manufactured has a particularly excellent discharge property from the droplet discharge head, and the manufactured color filter has a particularly excellent durability. Can be. Further, a sufficient color density can be ensured in the produced color filter.

The content of the curable resin material with respect to 100 parts by weight of the pigment is preferably 15 to 50 parts by weight, and preferably 19 to 42 parts by weight. By satisfying such conditions, the dispersion stability of the pigment in the color filter ink and the discharge stability of the color filter ink are particularly excellent, and the color filter formed using the color filter ink The coloring property and contrast of the colored part can be made particularly excellent. Further, the adhesion of the colored portion to the substrate can be made particularly excellent.
The curable resin material constituting the color filter ink may include a polymer other than the polymer A, the polymer B, and the polymer C described above.
The color filter ink may contain components other than those described above. Examples of the components other than those described above constituting the color filter ink include a dispersant.

<Dispersant>
The color filter ink may contain a dispersant. Thereby, for example, the ejection stability of ink droplets can be made particularly excellent. Moreover, when a pigment is contained in the color filter ink, the dispersant can contribute to improving the dispersibility of the pigment particles in the color filter ink.

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

  In particular, the color filter ink includes, as a dispersant, a dispersant having a predetermined acid value (hereinafter also referred to as an acid value dispersant) and a dispersant having a predetermined value (hereinafter also referred to as an amine value dispersant). It is preferable to include it simultaneously. Thereby, the effect by the acid value dispersing agent which exhibits the viscosity reduction effect which reduces the viscosity of the ink for color filters and the effect by the amine number dispersing agent which stabilizes the viscosity of the ink for color filters are compatible. Further, the effect of the surface tension acid value dispersant of the color filter ink and the effect of the amine value dispersant that improves the dispersibility of the solid content in the color filter ink are compatible. As a result, the discharge stability of the color filter ink droplets can be made particularly excellent. In particular, when a pigment is contained in the color filter ink, the pigment can be stably dispersed in a fine particle state, and the fluidity of the ink at the time of forming the colored portion is maintained for a longer time.

  Specific examples of the acid value dispersant include Dispersic P104, Dispersic P104S, Dispersic 220S, Dispersic 110, Dispersic 111, Dispersic 170, Dispersic 171, Dispersic 174, Dispersic 2095 (above, BYK Chemie) EFKA 5010, EFKA 5065, EFKA 5066, EFKA 5070, EFKA 7500, EFKA 7554 (manufactured by Ciba Specialty Co., Ltd.); (Above, manufactured by Lubrizol).

  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 the acid value dispersant and the amine value dispersant are used in combination, the acid value of the acid value dispersant (acid value when converted to solid content) is not particularly limited, but is preferably 5 to 370 KOHmg / g. It is more preferably 20 to 270 KOH mg / g, and further preferably 30 to 135 KOH mg / g. When the acid value of the acid value dispersant is within the above range, the viscosity of the color filter ink can be more significantly reduced and stabilized when used in combination with the amine value dispersant as described above. . In addition, when a pigment is contained in the color filter ink, the dispersion stability of the pigment can be made particularly excellent. The acid value of the dispersant can be determined by a method based on DIN EN ISO 2114, for example.

Moreover, it is preferable that the acid value dispersant does not have a predetermined amine value, that is, the amine value is zero.
When the amine value dispersant and the acid value dispersant are used in combination, the amine value of the amine value dispersant (amine value in terms of solid content) is not particularly limited, but is preferably 5 to 200 KOHmg / g. It is more preferably 25 to 170 KOH mg / g, and further preferably 30 to 130 KOH mg / g. When the amine value of the amine value dispersant is within the above range, the viscosity of the color filter ink can be more significantly reduced and stabilized when used in combination with the amine value dispersant as described above. . In addition, when a pigment is contained in the color filter ink, the dispersion stability of the pigment 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.
Further, when the acid value dispersant and the amine value dispersant are used in combination, the content of the acid value dispersant in the color filter ink is X _A [wt%], and the amine value dispersant is contained in the color filter ink. When the rate is X _B [wt%], it is preferable that the relationship of 0.1 ≦ X _A / X _B ≦ 1 is satisfied, and the relationship of 0.15 ≦ X _A / X _B ≦ 0.5 is satisfied. Is more preferable. By satisfying such a relationship, the synergistic effect by using the acid value dispersant and the amine value dispersant in combination is more remarkably exhibited, and the discharge stability of the droplets can be made particularly excellent. .

The acid value of the acid value dispersant is AV [KOH mg / g], the amine value of the amine value dispersant is BV [KOH mg / g], the content of the acid value dispersant is X _A [wt%], and the amine When the content of the valent dispersant is X _B [wt%], it is preferable that the relationship of 0.01 ≦ (AV × X _A ) / (BV × X _B ) ≦ 1.9 is satisfied, and 0.10 _{≦ (AV × X a) /} (BV × X B) is more desirable to satisfy the relation of ≦ 1.5. By satisfying such a relationship, the synergistic effect by using the acid value dispersant and the amine value dispersant in combination is more remarkably exhibited, and the discharge stability of the droplets can be made particularly excellent. .
The content of the dispersant in the color filter ink is not particularly limited, but is preferably 2.5 to 10.2 wt%, and more preferably 3.2 to 9.2 wt%.

<Thermoplastic resin>
Further, the color filter ink may contain a thermoplastic resin. Thereby, for example, when the color filter ink contains a pigment, the dispersibility of the pigment particles in the color filter ink can be made particularly 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 acid ester resin, styrene-maleic acid resin, styrene. -Maleic acid half ester resin, methacrylic acid-methacrylic ester resin, acrylic acid-acrylic ester resin, isobutylene-maleic resin, rosin-modified maleic resin, polyvinylpyrrolidone, gum arabic starch, polyallylamine, polyvinylamine, polyethyleneimine Etc., and one or more selected from these can be used in combination.
The content of the thermoplastic resin in the color filter ink is not particularly limited, but is preferably 1.5 to 7.7 wt%, and more preferably 2.1 to 7.2 wt%.

<Other ingredients>
The color filter ink of the present invention may contain components other than those described above. Examples of such components include various crosslinking agents; thermal acid generators such as diazonium salts, iodonium salts, sulfonium salts, phosphonium salts, selenium salts, oxonium salts, ammonium salts, onium salts such as benzothiazolium salts; Photoacid generators such as diazonium salts, iodonium salts, sulfonium salts, phosphonium salts, selenium salts, oxonium salts, ammonium salts; various polymerization initiators; acid crosslinking agents; surfactants; sensitizers; light stabilizers; Various polymerization accelerators; various light stabilizers; fillers such as glass and alumina; vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, N- (2-aminoethyl)- 3-aminopropylmethyldimethoxysilane, N- (2-aminoethyl) -3-aminopropyl Limethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-chloro Adhesion promoters such as propylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane; 2,2-thiobis (4-methyl-6-tert-butylphenol) ), Antioxidants such as 2,6-di-t-butylphenol; UV absorbers such as 2- (3-t-butyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotriazole and alkoxybenzophenone; Aggregation of sodium polyacrylate, etc. Sealing agent, and the like.

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

The surfactant flattens the colored portion by reducing the surface tension of the ink. As such surfactants, for example, acrylic surfactants, vinyl ether surfactants, silicone surfactants, fluorine surfactants and the like can be used. Specifically, examples of the acrylic surfactant include L-1983-50, 230, L-1982-50, L-1984-50, LHP-95 (manufactured by Enomoto Kasei Co., Ltd.) and the like, vinyl ether Examples of the system surfactant include L-1983-50, 230, L-1982-50, L-1984-50, LHP-95 (manufactured by Enomoto Kasei Co., Ltd.) and the like. , Megafuck R-08MH, Megafuck F482, Megafuck F470, Megafuck F471, Megafuck F472SF, HAS-36 (manufactured by Dainippon Ink Co., Ltd.) and the like. As a silicone surfactant, BYK- 307, BYK-300, BYK-302, BYK-306, BYK-330, BYK-331, BYK-344, BYK-silclean 700 (manufactured by BYK Chemie), KP-321, KP-324 (above, Shin-Etsu Silicone Co., Ltd.).
Among these, it is preferable to use an acrylic surfactant. The acrylic surfactant can contribute to the flattening of the colored portion and has excellent affinity with the polymer A as described above, and can increase the brightness of the formed colored portion.

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

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

  Further, the surface tension of the color filter ink at 25 ° C. is preferably 25 to 38 dyn / cm, more preferably 25 to 35 dyn / cm, and further preferably 25 to 32 dyn / cm. Thereby, the discharge property of the droplet can be made particularly stable. For this reason, the characteristic difference between individuals of the color filter to be manufactured can be made particularly small. As the surface tension, a value measured according to JIS K 3362 can be adopted.

  The contact angle of each color filter ink constituting the color filter ink set with respect to the surface of the color filter substrate (work) at 25 ° C. is preferably 3 to 15 °, and more preferably 5 to 10 °. It is more preferable. As a result, the color filter ink ejected and landed on the substrate can be suitably wetted and spread, and the manufactured color filter has particularly small unevenness in color density in the cell. In addition, the value measured based on JISR3257 can be employ | adopted for the contact angle with respect to the substrate surface for color filters of the ink for color filters.

  The viscosity of the color filter ink measured at 60 rpm using an E-type viscometer at 25 ° C. is preferably 13 mPa · s or less, more preferably 12 mPa · s or less, and 5 to 11 mPa · s. It is more preferable that Thus, when the viscosity of the color filter ink is sufficiently low, for example, the production efficiency of the color filter (formation efficiency of the colored portion) can be made particularly excellent, and the thickness of the colored portion It is possible to effectively prevent unintentional variations and the like.

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

  In particular, when the color filter has a green colored portion, the green color filter ink preferably contains the above-described flattening agent. In general, the green colored portion tends to have a large amount of colorant, and when the colored portion is formed, if the solvent content in the ink is low, the fluidity of the ink is likely to decrease, and the surface of the formed colored portion is sufficiently covered. It was not possible to flatten. However, by using the color filter ink of the present invention as the green color filter ink, the fluidity of the ink is maintained for a relatively long time when the ink is dried. Thereby, the green coloring part formed can be made flat.

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

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

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

<Coloring part>
The colored portion 12 is formed using the color filter ink (ink set) as described above.
Since the colored portion 12 is formed using the color filter ink as described above, the surface thereof is flat. For this reason, the color filter 1 is excellent in brightness and contrast ratio and has high reliability. Further, the color filter 1 is excellent in the color developability of the colored portion 12.

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

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

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

  As shown in FIG. 2, in this embodiment, a substrate preparation step (1a) for preparing a substrate 11, a partition formation step (1b, 1c) for forming a partition 13 on the substrate 11, and a color filter by an ink jet method. The ink application step (1d) for applying the ink 2 to the region surrounded by the partition wall 13, and the solvent (solvent) is removed from the color filter ink 2 to harden the curable resin material as the binder resin. A colored portion forming step (1e).

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

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

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

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

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

  The first position control device 104 moves the droplet discharge means 103 along the X-axis direction and the Z-axis direction orthogonal to the X-axis direction in response to a signal from the control means 112. Further, the first position control device 104 also has a function of rotating the droplet discharge means 103 around an axis parallel to the Z axis. In the present embodiment, the Z-axis direction is a direction parallel to the vertical direction (that is, the direction of gravitational acceleration). The second position controller 108 moves the stage 106 along the Y-axis direction orthogonal to both the X-axis direction and the Z-axis direction in response to a signal from the control unit 112. Further, the second position control device 108 also has a function of rotating the stage 106 around an axis parallel to the Z axis.

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

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

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

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

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

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

  As shown in the figure, each droplet discharge head 114 is an inkjet head. More specifically, each droplet discharge head 114 includes a vibration plate 126 and a nozzle plate 128. Between the diaphragm 126 and the nozzle plate 128, a liquid pool 129 that is always filled with the color filter ink 2 supplied from the tank 101 through the hole 131 is located.

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

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

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

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

In this specification, a portion including one nozzle 118, a cavity 120 corresponding to the nozzle 118, and a vibrator 124 corresponding to the cavity 120 may be referred to as “ejection unit 127”. According to this notation, one droplet discharge head 114 has the same number of discharge units 127 as the number of nozzles 118.
Using the droplet discharge device 100 as described above, the color filter ink 2 corresponding to the colored portions 12 of the plurality of colors of the color filter 1 is applied to the cells 14. By using the apparatus as described above, the color filter ink 2 can be efficiently and selectively applied to the cells 14. In addition, as described above, the color filter ink 2 has excellent ejection stability, and even when droplets are ejected for a long period of time, the flight curve and the droplet ejection amount are low. Problems such as destabilization are extremely unlikely to occur. Therefore, a plurality of types of inks used to form colored portions of different colors are mixed (mixed), or between a plurality of colored portions that are originally required to have the same color density. Problems such as the occurrence of variations in color density can be reliably prevented. In the illustrated configuration, the droplet discharge device 100 has only one tank 101 for holding the color filter ink 2, a tube 110, etc., but the color filter 1 has a plurality of these members. It may have a plurality of colors corresponding to the colored portion 12. In manufacturing the color filter 1, a plurality of droplet discharge devices 100 corresponding to a plurality of color filter inks 2 may be used.
In the present invention, the droplet discharge head 114 may use an electrostatic actuator as a driving element instead of a piezoelectric element. In addition, the droplet discharge head 114 may be configured to use an electrothermal conversion element as a drive element and discharge the color filter ink by utilizing the thermal expansion of the material by the electrothermal conversion element.

<Colored part forming step (curing step)>
Next, the solvent is removed from the color filter ink 2 in the cell 14 and the curable resin material is cured to form a solid colored portion 12 (1e). Thereby, the color filter 1 is obtained.
This step is usually performed by heating.

Moreover, in this embodiment, this process performs several heat processing from which temperature differs. Specifically, this process includes a first heat treatment for heating the substrate 11 at a relatively low temperature, and a second heat treatment for heating the substrate 11 at a temperature higher than the first heat treatment. .
First, in the first process of heating the substrate 11 at a relatively low temperature, the color filter ink 2 discharged into the cell 14 is dried, and the low-boiling component x contained in the ink 2 is converted into a high-boiling point. The component y is evaporated more preferentially than the component y. In particular, when drying is performed in a reduced pressure environment, a temperature range close to room temperature is likely to cause a viscosity change more sensitively by evaporating the solvent for about 10 minutes in a reduced pressure chamber of about 100 Pa using a pump or the like. Can be dried.

  Thereafter, a second process of heating the substrate 11 at a higher temperature than the first process is performed to completely evaporate (remove) the high-boiling component y and the remaining component x and to cure the curable resin material. Let Thereby, the surface of the color filter ink 2 discharged into the cell 14 is more reliably flattened, and the state where the surface of the ink 2 is flattened can be more reliably maintained. . As a result, the colored portion 12 to be formed can be surely flattened, and the brightness and contrast ratio of the color filter 1 can be improved.

In the first treatment as described above, the temperature of the heated substrate 11 is not particularly limited, but is preferably 30 to 100 ° C, and preferably 40 to 80 ° C. Thereby, the solvent can be suitably removed from the color filter ink 2 while further suppressing the convection of the color filter ink 2.
Moreover, the time of the first heat treatment is not particularly limited, but is preferably 3 to 80 minutes, and more preferably 5 to 60 minutes.

In the second treatment as described above, the temperature of the heated substrate 11 is not particularly limited, but is preferably 120 to 280 ° C, and preferably 150 to 250 ° C. Thereby, the solvent which could not be removed by the first heat treatment can be completely removed.
The time for the second heat treatment is not particularly limited, but is preferably 25 to 100 minutes, and more preferably 30 to 90 minutes.

  Further, in this step, for example, treatment such as irradiation with active energy rays or placing the substrate 11 to which the color filter ink 2 is applied in a reduced pressure environment may be performed. By irradiating the active energy ray, the curing reaction of the curable resin material is allowed to proceed efficiently, or the curing reaction of the curable resin material is reliably advanced even when the heating temperature is relatively low. Thus, it is possible to obtain an effect that the adverse effect on the substrate 11 and the like can be prevented more reliably. As the active energy ray, light beams having various wavelengths, for example, ultraviolet rays, X-rays, g-rays, i-rays, excimer lasers, and the like can be used. Further, by placing the substrate 11 provided with the color filter ink 2 in a reduced pressure environment, the solvent can be reliably removed even when the heating temperature is relatively low. Occurrence of adverse effects on the formed colored portion 12 and the like is more reliably prevented.

<Image display device>
Next, a preferred embodiment of a liquid crystal display device that is an image display device (electro-optical device) having the color filter 1 will be described.
FIG. 7 is a cross-sectional view showing a preferred embodiment of the liquid crystal display device. As shown in the figure, the liquid crystal display device 60 includes a color filter 1, a substrate (opposite substrate) 66 disposed on the surface side where the colored portion 12 of the color filter 1 is provided, a color filter 1 and a substrate 66. And a polarizing plate 67 provided on the side of the color filter 1 opposite to the surface facing the liquid crystal layer 62 (lower side in FIG. 7). And a polarizing plate 68 provided on the surface opposite to the surface facing the liquid crystal layer 62 of the substrate 66 (upper side in FIG. 7). A common electrode 61 is provided on the surface of the color filter 1 on which the colored portion 12 and the partition wall 13 are provided (the surface opposite to the surface of the colored portion 12 and the partition wall 13 facing the substrate 11). On the surface of the (opposite substrate) 66 facing the liquid crystal layer 62 and the color filter 1, pixel electrodes 65 are arranged in a matrix at positions corresponding to the colored portions 12 of the color filter 1. Further, an alignment film 64 is provided between the common electrode 61 and the liquid crystal layer 62, and an alignment film 63 is provided between the substrate 66 (pixel electrode 65) and the liquid crystal layer 62.

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

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

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

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

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

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

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

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

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

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

As mentioned above, although this invention was demonstrated based on suitable embodiment, this invention is not limited to these.
For example, in the above-described embodiment, after applying the color filter ink corresponding to the colored portion of each color into the cell, the solvent is removed from the color filter ink of each color in the cell in a lump, and the curable resin Although it has been described that the material is cured, that is, the colored portion forming step is performed only once, the ink application step and the colored portion forming step may be repeatedly performed corresponding to each color.

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

In the above-described embodiment, the case where the color filter ink set includes the three types (three colors) of color filter inks corresponding to the three primary colors of light has been mainly described. The number and type (color) of the color filter ink to be configured are not limited to those described above. For example, the color filter ink set of the present invention may include four or more color filter inks.
In the above-described embodiment, the colored portion forming process has been described as performing two stages of heat treatment. However, the colored portion may be formed by a single heat treatment, or in a single heat treatment. The heating temperature may be changed.

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, reflux condenser, dropping funnel, nitrogen inlet tube and thermometer, 37.6 parts by weight of diethylene glycol monobutyl ether acetate as component x as a solvent (solvent) was added and heated to 90 ° C. Heated. Subsequently, 2,2′-azobis (isobutyronitrile) (AIBN): 2 parts by weight and diethylene glycol monobutyl ether acetate: 3 parts by weight were added, and (3,4-epoxycyclohexyl) was added to the flask. ) Methyl methacrylate (manufactured by Daicel Chemical Industries, Ltd., trade name Cyclomer M100): 27 parts by weight, 2- (0- [1′methylpropylideneamino] carboxyamino) ethyl methacrylate (manufactured by Showa Denko KK, product) Name MOI-BM): 1.5 parts by weight, 2-hydroxyethyl methacrylate (HEMA): 1.5 parts by weight was mixed dropwise over about 4 hours using a dropping pump. 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: a solution obtained by dissolving 5 parts by weight in 20 parts by weight of diethylene glycol monobutyl ether acetate (Polymerization initiator solution) was added dropwise over about 4 hours using another dropping pump. After dropping of the polymerization initiator solution was completed, AIBN: 0.2 part by weight and diethylene glycol monobutyl ether acetate: 1 part by weight were added and maintained at the same temperature for about 2 hours, and then AIBN: 0.2 part by weight And diethylene glycol monobutyl ether acetate: 1 part by weight was added and kept at about the same temperature for about 2 hours, and then cooled to about room temperature to obtain a polymer solution containing the polymer A1 as the polymer A.
(Synthesis Examples 2 to 10)
The same operation as in Synthesis Example 1 was performed except that the types of monomer components used in the synthesis of the polymer (preparation of polymer solution) and the types of the amounts used were changed as shown in Table 1. As a result, nine kinds of polymer solutions each containing nine kinds of polymers A (polymers 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 Co., Ltd.) 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 containing the polymer B1 as the polymer B was obtained.
(Synthesis Examples 12-15)
The same operation as in Synthesis Example 11 was performed except that the types of monomer components used in the synthesis of the polymer (preparation of polymer solution) and the types of the amounts used were changed as shown in Table 1. As a result, 5 types of polymer solutions each including 5 types of polymers B (polymers B2 to B5) were obtained.

(Synthesis Example 16)
(3,4-epoxycyclohexyl) methyl methacrylate (manufactured by Daicel Chemical Industries, trade name Cyclomer M100), 2- (0- [1′methylpropylideneamino] carboxyamino) ethyl methacrylate (Showa Denko Co., Ltd.) 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 containing the polymer C1 as the polymer C was obtained.

(Synthesis Examples 17 and 18)
The same operation as in Synthesis Example 16 was performed except that the types of monomer components used in the synthesis of the polymer (preparation of the polymer solution) and the types of the amounts used were changed as shown in Table 1. As a result, two types of polymer solutions (polymer solutions C2 and C3) each including two types of polymers C (polymers C2 and C3) were obtained.

  Table 1 summarizes the types of materials used in the synthesis of polymers in Synthesis Examples 1 to 18 (preparation of polymer solutions) and the amounts used (compositions of the polymers synthesized in Synthesis Examples 1 to 18). In the table, “V-601” represents 2,2′-azobis (isobutyric acid) dimethyl, “AIBN” represents 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 2- (0- [1′methylpropylideneamino] carboxyamino) ethyl methacrylate (MOI-BM), and“ a2-2 ”indicates 2-acryloyloxyethyl isocyanate (manufactured by Showa Denko KK Product name “Karenz MOI”), “a3-1” indicates 2-hydroxyethyl methacrylate (HEMA), and “a3-2” indicates 4 It represents hydroxybutyl acrylate, “a4-1” represents 1H, 1H, 5H-octafluoropentyl methacrylate (Biscoat 8FM), “a4-2” represents 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" Refers to cyclohexyl 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 (ink set) (Example 1)
Dispersic 166: 12.96 g (36 parts by weight) as a dispersant, Dispersic 111: 4.32 g (12 parts by weight) as a dispersant, and SPCN-17X (made by Showa Polymer Co., Ltd.) as a thermoplastic resin ): 28.43 g (79 parts by weight), diethylene glycol monobutyl ether acetate as component x as a solvent: 40.3 g (112 parts by weight), polyethylene glycol # 300 as component y (average weight molecular weight: 300, viscosity: 70 mPa S): 21.6 g (60 parts by weight) was charged into a stirrer (uniaxial mixer) having an internal capacity of 400 cc, and stirred for 10 minutes with a disper mill to perform preliminary dispersion, thereby obtaining a dispersant dispersion. (Preliminary dispersion step). At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm.

Next, as described below, a fine dispersion step was performed in which a 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, 355.99 g (100 parts by weight) of pigment was added to the obtained dispersant dispersion and stirred for 10 minutes. At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm. Examples of the pigment include C.I. I. A mixture of Pigment Green 58: 32.39 g and a sulfonated pigment derivative powder having a chemical structure represented by the formula (4): 3.60 g was used. At this time, the mixture was diluted with diethylene glycol monobutyl ether acetate and polyethylene glycol # 300 as a solvent so that the pigment content in the mixture of the dispersant dispersion and the pigment was 16 wt%.

Next, 720 g of inorganic beads having an average particle diameter of 0.8 mm (first inorganic beads, manufactured by zirconia, “Toray ceramic pulverized ball” (trade name), manufactured by Toray Industries, Inc.): 30 minutes at room temperature The first dispersion process (first process) was performed with stirring. 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, manufactured by zirconia, “Toray ceramic pulverized ball” (trade name), manufactured by Toray Industries, Inc.): 720 g was added, and the mixture was further stirred for 30 minutes to perform the second stage dispersion treatment (second treatment). At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm. At this time, the resultant pigment dispersion was diluted with diethylene glycol monobutyl ether acetate and polyethylene glycol # 300 as a solvent so that the pigment content was 13 wt%.
Thereafter, the inorganic beads (second inorganic beads) were removed by filtration using a filter (“PALL HDCII Membrane Filter” (trade name), manufactured by PALL) to obtain a pigment dispersion.

  Next, the pigment dispersion obtained as described above, the polymer solution containing the polymer A1, the polymer solution containing the polymer B1, and the polymer solution containing the polymer C1 were mixed. In this step, the pigment dispersion, the polymer solution containing the polymer A1, the polymer solution containing the polymer B1, and the polymer solution containing the polymer C1 are mixed with a stirrer (uniaxial mixer) having a content of 400 cc. And stirred for 10 minutes with a disper mill. At this time, the rotation speed of the stirring blade of the stirrer was set to 2000 rpm. As a result, the intended green color filter ink (G ink) was obtained. X / when the amount of diethylene glycol monobutyl ether acetate (component x) used as the solvent contained in the obtained ink (G ink) is X and the amount of polyethylene glycol # 300 (component y) is Y. The value of Y was 19.

Further, except that the type of pigment, the amount of each component used, and the stirring conditions were changed, the red color filter ink (R ink) and the blue color filter ink ( B ink) was prepared. As a result, an ink set composed of three colors of R, G, and B was obtained. The average particle diameter of the pigment constituting the R ink, the average particle diameter of the pigment constituting the G ink, and the average particle diameter of the pigment constituting the B ink were 70 nm, 70 nm, and 70 nm, respectively.
(Examples 2 to 8)
A color filter ink (ink set) was prepared in the same manner as in Example 1 except that the type and content of the color filter ink were changed as shown in Tables 2 and 3.

(Comparative Examples 1-3)
A color filter ink (ink set) was prepared in the same manner as in Example 1 except that the type and content of the color filter ink material were changed as shown in Table 3.
(Comparative Example 4)
A color filter ink (ink set) was prepared in the same manner as in Example 1 except that the type and content of the color filter ink material were changed as shown in Table 3. In addition, the solubility parameter (SP value) of the curable resin material component obtained by mixing each polymer solution (polymer solution A2, polymer solution B4, polymer solution C1) used in this comparative example is 11. 7 [(cal / ml) ^1/2 ], SP value of 1,3-butylene glycol diacetate as component x is 9.5 [(cal / ml) ^1/2 ], butylene carbonate as component y The SP value was 12.1 [(cal / ml) ^1/2 ].

Tables 2 and 3 collectively show the types and contents of the components of the color filter ink in each of the above Examples and Comparative Examples. Tables 4 and 5 collectively show polar components and hydrogen bonding components of the solubility parameter (SP value) for the components of the color filter ink in each of the above Examples and Comparative Examples. In the table, C.I. I. A mixture of a powder composed of Pigment Red 177 and a powder composed of a pigment derivative represented by the following formula (2) is referred to as “PR177D”, mainly C.I. I. “PR254D” is a mixture of the powder composed of Pigment Red 254 and the powder composed of the pigment derivative represented by the following formula (3), and the powder composed of the pigment derivative represented by the formula (4) “SPD”, C.I. I. Pigment Green 58 is changed to “PG58”, C.I. I. Pigment Green 36 is “PG36”, C.I. I. Pigment Blue 15: 6 is changed to “PB15: 6”, C.I. I. Pigment Yellow 150 is “PY150”, Dispersic 111 (acid value: 50 KOHmg / g) is “DA1”, Dispersic 2095 (acid value: 13 KOHmg / g) is “DA2”, Dispersic P104 (acid value: 360 KOHmg / g) ) Is indicated by “DA3”, Dispersic 166 (amine value: 115 KOH mg / g) is indicated by “DA4”, and SPCN-17X is indicated by “DR1”. In Tables 4 and 5, SP _p (x) [(cal / cm ³ ) ^1/2 ] represents the polar component of the SP value of component x, and SP _h (x) [(cal / cm ³ ). ^1/2 ] is the hydrogen bond component of the SP value of component x, SP _p (y) [(cal / cm ³ ) ^1/2 ] is the polar component of the SP value of component y, SP _h ( y) [(cal / cm ³ ) ^1/2 ] is the hydrogen bond component of the SP value of component y, and SP _p (R) [(cal / cm ³ ) ^1/2 ] is the SP of the curable resin material. SP _h (R) [(cal / cm ³ ) ^1/2 ] represents the hydrogen bond component of the SP value of the curable resin material, respectively. The acid value of the dispersant was determined by a method based on DIN EN ISO 2114, and the amine value was determined by a method based on DIN 16945. In the table, the type of solvent (liquid medium) indicates that “S1” indicates diethylene glycol monobutyl ether acetate, “S2” indicates 1,3-butylene glycol diacetate, and “S3”. Represents dipropylene glycol methyl ether acetate (DPMA), “S4” represents propylene recall diacetate, “S5” represents polyethylene glycol # 300, and “S6” represents triglyceride. It indicates ethylene glycol monomethyl ether, “S7” indicates polyethylene glycol monomethyl ether, “S8” indicates diethylene glycol monohexyl ether, and “S9” indicates butylene carbonate. Moreover, about the kind of solvent (solvent) in the table | surface, it carried out similarly to Table 1, and showed the various solvent (solvent). In the column of the curable resin material in the table, the polymer contained in the polymer solution A1 is indicated by A1. Similarly, the polymers contained in the polymer solutions A2 to A10, B1 to B6, and C1 to C3 are indicated by A2 to A10, B1 to B6, and C1 to C3, respectively. In addition, the polymer solution containing each polymer (Polymer A, B, C) used in each Example and each Comparative Example is, respectively, the component x used in each Example and each Comparative Example as a solvent (solvent) Using. In addition, C. used in each Example and each comparative example. I. The content ratio of the pigment derivative represented by the formula (2) in the mixture of Pigment Red 177 and the pigment derivative represented by the formula (2) was 0.1 to 10 wt%. In addition, C.I. used in the above Examples and Comparative Examples. I. The content of the pigment derivative represented by the formula (3) in the mixture of Pigment Red 254 and the pigment derivative represented by the formula (3) was 0.1 to 10 wt%.

[3] Stability evaluation of droplet discharge (Stable discharge evaluation)
About the color filter inks of the respective Examples and Comparative Examples (color filter inks immediately after production), and these inks that were left in a 50 ° C. environment for 6 days (color filter inks that were left in a heated environment) ) Was used to evaluate the following test.

[3.1] Evaluation of Landing Position Accuracy Prepared are a droplet discharge device as shown in FIGS. 3 to 6 installed in a chamber (thermal chamber) and R inks of the respective examples and comparative examples. With the drive waveform 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 25 ° C. and 55% 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 As the average value of the shift amount d, the average value of the values obtained for the three color inks was employed.
A: The average value of the shift amounts 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.

[3.2] Stability evaluation of droplet discharge amount Droplet discharge device as shown in FIG. 3 to FIG. 6 installed in a chamber (thermal chamber), and ink sets for color filters of each of the above examples and comparative examples In the state where the drive waveform of the piezo element is optimized, and each ink is subjected to 100,000 droplets (100,000 droplets) from each nozzle of the droplet discharge head in an environment of 25 ° C. and 55% RH. Continuous discharge was performed. For the two specified nozzles on the left and right ends of the droplet discharge head, the total weight of the discharged droplets is obtained, and the absolute value ΔW [ng] of the difference between the average discharge amounts of the droplets discharged from the two nozzles is calculated. Asked. The ratio (ΔW / W _T ) of this ΔW to the target discharge amount W _T [ng] of the droplet was determined and evaluated according to the following four criteria. As the value of [Delta] W / W _T is small, it can be said that the greater the stability of the droplet discharge amount. As the value of [Delta] W / W _T, it was used the average of the values obtained for the three colors of ink.
A: The value of ΔW / _{W T} is less than 0.023.
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.

[3.3] Evaluation of intermittent printing performance Prepared are a droplet discharge device as shown in FIG. 3 to FIG. 6 installed in a chamber (thermal chamber) and an ink set for a color filter of each of the above examples and comparative examples, With the drive waveform of the piezo element optimized, 10000 droplets (10,000 droplets) are continuously discharged from each nozzle of the droplet discharge head for each ink in an environment of 25 ° C. and 55% RH. Thereafter, the droplet ejection was interrupted for 30 seconds (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). As the value of | W ₁ −W ₂₀ | / W, an average value of the values obtained for the three color inks was adopted.
_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] Production of color filter A color filter was produced in the following manner using the color filter ink sets obtained in the above Examples and Comparative Examples.
First, a soda glass substrate (G5 size: 1100 × 1300 mm) on which a silica (SiO ₂ ) film for preventing elution of sodium ions was formed on both surfaces was prepared and subjected to a cleaning treatment.

Next, the radiation-sensitive composition for forming partition walls containing carbon black was applied to the entire surface of one of the cleaned substrates to form a coating film.
Next, prebaking was performed under the conditions of heating temperature: 110 ° C. and heating time: 120 seconds.
Thereafter, irradiation with radiation is performed through a photomask to perform post-exposure baking (PEB), followed by development using an alkali developer, and further by performing post-baking to separate the partition walls. Formed. PEB was performed under the conditions of heating temperature: 110 ° C., heating time: 120 seconds, and radiation irradiation intensity: 150 mJ / cm ² . The development process was performed by, for example, a vibration dipping method. The development processing time was 60 seconds. The post-bake treatment was performed under the conditions of heating temperature: 150 ° C. and heating time: 5 minutes. The formed partition wall had a thickness of 2.1 μm.

  Next, using a droplet discharge device as shown in FIGS. 3 to 6, color filter ink was discharged into a cell as a region surrounded by a partition wall. At this time, three color filter inks were used so that the color filter inks of the respective colors were not mixed. In each cell, the color filter ink was applied in such an amount that the average thickness of the colored portion to be formed was 2.0 μm.

Thereafter, heat treatment was performed on a hot plate at 60 ° C. for 30 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, 5000 color filters were produced using the color filter inks (ink sets) of each Example and each Comparative Example.

[4] Evaluation of color filter The following evaluation was performed using each color filter obtained as described above.
[4.1] 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 5000th 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, 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 noticeable.

[4.2] Evaluation of contrast ratio The liquid crystal display devices of the above Examples and Comparative Examples manufactured in [4.1] were evaluated as shown below. Compared to the case where a red single color display, a green single color display, and a blue single color display are performed using a liquid crystal display device, and a light color display is not performed using a contrast tester (Takasaka Electric Co., Ltd., CT-1). The contrast ratio (CR) was obtained and evaluated as follows.

In the case of red single color display, evaluation was performed according to the following four-stage criteria.
A: CR is 3600 or more.
B: CR is 3300 or more and less than 3600.
C: CR is 3000 or more and less than 3300.
D: CR is less than 3000.

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

In the case of blue single color display, evaluation was performed according to the following four-stage criteria.
A: CR is 3700 or more.
B: CR is 3400 or more and less than 3700.
C: CR is 3100 or more and less than 3400.
D: CR is less than 3100.

[4.3] Evaluation of lightness The liquid crystal display devices of the above Examples and Comparative Examples manufactured in [4.1] were evaluated as follows. About a liquid crystal display device, a red single color display, a green single color display, and a blue single color display are performed, and tristimulus values are obtained by a xyY colorimetric method using a chromaticity meter (CM-3700d, manufactured by Minolta). Evaluation was performed as follows.

In the case of red single color display, brightness Y (when converted to C light source as Y when (x, y) = (0.650, 0.335)) was evaluated according to the following four-stage criteria.
A: Brightness Y is 21.0 or more.
B: Lightness Y is 20.0 or more and less than 21.0.
C: Brightness Y is 19.0 or more and less than 20.0.
D: Lightness Y is less than 19.0.

In the case of green single color display, brightness Y (when converted to C light source as Y when (x, y) = (0.285, 0.600)) was evaluated according to the following five-stage criteria.
A: Brightness Y is 56.0 or more.
B: Lightness Y is 55.0 or more and less than 56.0.
C: Brightness Y is 54.0 or more and less than 55.0.
D: Brightness Y is 53.0 or more and less than 54.0.
E: Lightness Y is less than 53.0.

In the case of blue monochromatic display, the brightness Y (when converted to a C light source as Y when (x, y) = (0.140, 0.098)) was evaluated according to the following five-stage criteria.
A: Brightness Y is 12.5 or more.
B: Lightness Y is 11.5 or more and less than 12.5.
C: Brightness Y is 10.5 or more and less than 11.5.
D: Brightness Y is 9.5 or more and less than 10.5.
E: Lightness Y is less than 9.5.
In each of the above evaluations, each color filter was observed and measured under the same conditions.
These results are shown in Tables 6 and 7.

As is apparent from Tables 6 and 7, in the present invention, the obtained color filter ink is excellent in ejection stability, and the colored portion of the produced color filter is flat. It was excellent. In addition, the produced color filter suppressed the occurrence of uneven color, uneven density, and light leakage. On the other hand, in each comparative example, a satisfactory result was not obtained.
Moreover, in each Example, it was observed that the thixotropy index of the color filter ink was sufficiently reduced by adding a flattening agent.
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 (16)

A color filter ink used in the production of an ink jet color filter,
A colorant, a curable resin material, and a solvent that dissolves the curable resin material,
The solvent has a component x and a component y having a boiling point higher than that of the component x,
Of the solubility parameters of the component x, the polar component is SP _p (x) [(cal / cm ³ ) ^1/2 ] and the hydrogen bond component is SP _h (x) [(cal / cm ³ ) ^1/2 ]. ,
Among the solubility parameters of the component y, the polar component is SP _p (y) [(cal / cm ³ ) ^1/2 ], and the hydrogen bond component is SP _h (y) [(cal / cm ³ ) ^1/2 ]. ,
Of the solubility parameters of the curable resin material, the polar component is SP _p (R) [(cal / cm ³ ) ^1/2 ], and the hydrogen bond component is SP _h (R) [(cal / cm ³ ) ^1/2. ], The color filter ink satisfying the following formulas (I) to (IV):
0.2 ≦ | SP _p (x) −SP _p (R) | ≦ 3 (I)
0.5 ≦ | SP _h (x) −SP _h (R) | ≦ 3 (II)
_{| SP p (y) -SP p} (R) | <| SP p (x) -SP p (R) | ... (III)
_{| SP h (y) -SP h} (R) | <| SP h (x) -SP h (R) | ... (IV) The values of the SP _p (y) [(cal / cm ³ ) ^1/2 ] and the SP _p (R) [(cal / cm ³ ) ^1/2 ] are both 2 to 5 (cal / cm ³ ). The color filter ink according to claim 1, which is ^½ . The values of the SP _h (y) [(cal / cm ³ ) ^1/2 ] and the SP _h (R) [(cal / cm ³ ) ^1/2 ] are 3 to 8 (cal / cm ³ ). The color filter ink according to claim 1, wherein the color filter ink is ^½ . SP _p (y) [(cal / cm ³ ) ^1/2 ], SP _p (R) [(cal / cm ³ ) ^1/2 ], SP _h (y) [(cal / cm ³ ) ^{1 / 2} ] and SP _h (R) [(cal / cm ³ ) ^1/2 ] satisfy the relationship of the following formula (V) and the following formula (VI). Color filter ink.
| SP _p (y) −SP _p (R) | ≦ 1 (V)
_{| SP h (y) -SP h} (R) | ≦ 1 ... (VI) When the boiling point of the component x under atmospheric pressure is T _bp (x) [° C.] and the boiling point of the component y under atmospheric pressure is T _bp (y) [° C.], 15 ≦ T _bp (y) −T _The ink for a color filter according to claim 1, wherein _bp (x) ≦ 70.   6. The color filter ink according to claim 1, wherein the content of the component x in the color filter ink is X [wt%] and the content of the component y is Y [wt%], and 2 ≦ X / Y ≦ 30. The color filter ink according to any one of the above.   The color filter ink according to any one of claims 1 to 6, wherein the color filter ink contains at least one of a polyhydric alcohol or an alkyl ether of a polyhydric alcohol as the component y.   The color filter ink according to claim 7, wherein the polyhydric alcohol is an oligomer of glycols.   The color filter ink according to any one of claims 1 to 8, wherein the curable 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 according to claim 9, wherein the color filter ink is a copolymer. The said curable resin material contains the polymer B formed by containing at least the alkoxysilyl group containing vinyl monomer represented by following formula (1) as a monomer component. The color filter ink described.

A color filter ink set including different color filter inks,
An ink set for a color filter comprising the color filter ink according to any one of claims 1 to 11 as the color filter ink.   A color filter manufactured using the color filter ink according to claim 1.   A color filter manufactured using the color filter ink set according to claim 12.   An image display device comprising the color filter according to claim 13.   An electronic apparatus comprising the image display device according to claim 15.

Images