JP5735405B2 - Colored resin composition, color filter, and liquid crystal display device - Google Patents

Description

  The present invention relates to a colored resin composition, a color filter using the colored resin composition, and a liquid crystal display device having the color filter. More specifically, a coloring resin composition for forming a micropixel having excellent sensitivity and resolution and excellent film surface smoothness even when the dye is at a high concentration, a color filter using the coloring resin composition, and the color filter. The present invention relates to a liquid crystal display device.

The colored resin composition contains, for example, an alkali-soluble resin, a polymerizable monomer, and a photopolymerization initiator, and can be polymerized and cured by irradiation with light, so that it is used for color filters, various photoresists, and the like. .
Curing with light can be cured in a desired pattern by irradiating it through a photomask, and so there is a high demand in various fields of application. In particular, high productivity that can improve productivity and reduce the amount of photopolymerization initiator added. There is a growing demand for sensitive photopolymerization initiators.
In addition, a color filter using a pigment dispersion method is usually a colored resin composition obtained by adding a binder resin, a photopolymerizable monomer and a photopolymerization initiator to a pigment dispersion obtained by dispersing a pigment with a dispersant or the like. After coating on a glass substrate and drying, exposure is performed using a photomask, development is performed to form a colored pattern, and heating is performed to fix the pattern to form pixels. These steps are repeated for each color to form a color filter. The colored resin composition used for image formation of such a color filter is required to have characteristics such as sufficient resolution, high sensitivity, and adhesion to a substrate.

Thus, as a method for obtaining a colored resin composition that can achieve high sensitivity, high resolution, and the like, it has been proposed to use an oxime ester compound as a photopolymerization initiator (see Patent Documents 1 and 2).
However, the oxime ester-based photopolymerization initiator described in Patent Document 1 has insufficient sensitivity, resolution, developability, compatibility and solubility in solvents, and has limited use conditions, so there is room for further improvement. There is.

Japanese Patent No. 3993725 International Publication No. 2011/105518

  In recent years, color filters with high image reproducibility used for small electronic devices such as smartphones and tablet terminals have been desired, and pixel miniaturization (formation of fine lines) and high color rendering (high density chromaticity) are required. Has been. The oxime ester-based photopolymerization initiator described in Patent Document 2 has high sensitivity. However, when forming minute pixels, the line width after exposure and development becomes thicker than the setting, and high density chromaticity is achieved. There was a problem that the surface of the film was rough when the concentration of the pigment such as pigment or dye was high.

  An object of the present invention is to provide a color resin composition for forming a micropixel having excellent sensitivity and resolution even when the pigment is at a high concentration, and having excellent film surface smoothness, a color filter using the color resin composition, and the color A liquid crystal display device having a filter is provided.

As a result of intensive studies to achieve the above-mentioned problems, the present inventor has excellent surface smoothness and film surface smoothness by using a specific oxime ester photopolymerization initiator and a specific surfactant. It has been found that a colored resin composition capable of forming excellent fine pixels can be obtained and the above-mentioned problems can be solved.
That is, the present invention relates to the following [1] to [ 15 ].
[1] A compound containing a dye, a dispersant, an alkali-soluble resin, a photopolymerizable monomer, a photopolymerization initiator, a surfactant, and a solvent, wherein the photopolymerization initiator is represented by the following general formula (1) And the surfactant is a silicone-based and / or fluorine-based surfactant, the surfactant is contained in an amount of 0.001 to 5% by mass based on the total solid content of the colored resin composition, and the light A colored resin composition wherein the polymerization initiator further contains at least one selected from an acetophenone series, a benzophenone series, a thioxanthone series, and an imidazole series photopolymerization initiator .

[Wherein R ^{1 to} R ¹¹ are each independently a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, substituted Or an unsubstituted cycloalkyl group having 3 to 10 ring atoms, a substituted or unsubstituted cycloalkenyl group having 4 to 20 carbon atoms, a hydroxyl group, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, substituted or Unsubstituted alkenyloxy group having 2 to 20 carbon atoms, substituted or unsubstituted alkanoyl group having 1 to 20 carbon atoms, substituted or unsubstituted alkenoyl group having 2 to 20 carbon atoms, substituted or unsubstituted ring forming carbon number An aryl group having 6 to 14 or a substituted or unsubstituted heterocyclic group having 3 to 14 ring atoms is shown. R ³ may form a ring together with R ⁴ or R ⁵ . R ⁴ may form a ring together with R ⁵ .
Ar represents a substituted or unsubstituted aryl group having 6 to 14 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 14 ring atoms.
W represents a single bond or an oxygen atom. Z represents a single bond, an oxygen atom, or> NR ³ ′ (R ³ ′ represents a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or R ³ ′ is connected to R ³ together with a nitrogen atom. Forming a ring).
n represents an integer of 1 to 10. When n is an integer of 2 to 10, a plurality of R ⁴ and R ⁵ may be the same or different. ]
[2] The colored resin composition according to [1], wherein the compound represented by the general formula (1) is at least one compound represented by the following general formulas (3) to (7).

[ 3 ] The colored resin composition according to [1] or [2] , wherein the photopolymerization initiator is contained in an amount of 2 to 40% by mass based on the total solid content of the colored resin composition.
[ 4 ] The colored resin composition according to any one of [1] to [ 3 ], which contains a thiol compound as a sensitizer.
[ 5 ] The dye is C.I. I. Pigment red 177 and C.I. I. The colored resin composition according to any one of [1] to [ 4 ], which is at least one selected from CI Pigment Red 254.
[ 6 ] The dye is C.I. I. Pigment green 7, C.I. I. Pigment green 36, C.I. I. Pigment green 58, C.I. I. Pigment yellow 138, C.I. I. Pigment yellow 139 and C.I. I. The colored resin composition according to any one of [1] to [ 4 ], which is at least one selected from CI Pigment Yellow 150.
[ 7 ] The dye is C.I. I. Pigment blue 15, C.I. I. Pigment blue 15: 3, C.I. I. Pigment blue 15: 4, C.I. I. Pigment blue 15: 6 and C.I. I. The colored resin composition according to any one of [1] to [ 4 ], which is at least one selected from CI pigment violet 23.
[ 8 ] The above [1] to [ 7 ], wherein the ratio (P / V ratio) between the mass (P) of the dye and the mass (V) of solids other than the pigment is 0.15 to 1.0. ] The colored resin composition in any one of.
[ 9 ] The colored resin composition according to any one of [1] to [ 8 ], wherein the amine value of the dispersant is 200 mgKOH / g or less.
[ 10 ] The coloring according to any one of [1] to [ 9 ], wherein the alkali-soluble resin is an alkali-soluble resin having an acidic functional group, and the acid value of the acidic functional group is 10 to 150 mgKOH / g. Resin composition.
[ 11 ] The colored resin composition according to any one of [1] to [ 9 ], wherein the alkali-soluble resin is a cardo resin.
[ 12 ] Any of the above [1] to [ 11 ], wherein the solvent contains a solvent having a boiling point of atmospheric pressure of 100 ° C. or more and less than 165 ° C., and a solvent having a boiling point of atmospheric pressure of 165 to 200 ° C. A colored resin composition according to claim 1.
[ 13 ] The solvent having a boiling point of 100 ° C. or more and less than 165 ° C. is at least one selected from ethylene glycol monoethyl ether, ethylene glycol monomethyl ether acetate, and propylene glycol monomethyl ether acetate, and has a boiling point of atmospheric pressure. The colored resin according to [ 12 ], wherein the solvent having a temperature of 165 to 200 ° C is at least one selected from 3-methoxybutyl acetate, 3-methyl-3-methoxybutyl acetate and ethyl 3-ethoxypropionate. Composition.
[ 14 ] A color filter formed using the colored resin composition according to any one of [1] to [ 13 ].
[ 15 ] A liquid crystal display device having the color filter according to [ 14 ].

  According to the present invention, a colored resin composition for forming a micropixel having excellent sensitivity and resolution and excellent film surface smoothness even when the dye is at a high concentration, a color filter using the colored resin composition, and the color A liquid crystal display device having a filter can be provided.

It is a schematic sectional drawing which shows an example of the color filter of this invention. It is the pattern formed using the colored resin composition of this invention, Comprising: It is the SEM image which looked at the pattern edge part cross section after image development from the side surface direction. As for the end shape of the pattern, (a) is a forward taper type, (b) is a rectangular type, and (c) is a reverse taper type. It is the pattern formed using the colored resin composition of this invention, Comprising: It is the cross-sectional schematic diagram which looked at the pattern edge part shape after image development from the side surface direction. As for the end shape of the pattern, (a) is a forward taper type, (b) is a rectangular type, and (c) is a reverse taper type.

The colored resin composition of the present invention, a color filter using the colored resin composition, and a liquid crystal display device will be described in order.
[Colored resin composition]
The colored resin composition of the present invention contains a dye, a dispersant, an alkali-soluble resin, a photopolymerizable monomer, a photopolymerization initiator, a surfactant, and a solvent. The colored resin composition of the present invention may further contain a sensitizer and the like as necessary.

(Dye)
In the colored resin composition of the present invention, the dye used as the colorant is not particularly limited as long as it can produce a desired color when the colored layer of the color filter is formed, and is not particularly limited. A dye selected from various organic or inorganic colorants can be used alone or in admixture of two or more according to the color required by R, G, B, etc. or the black matrix layer.
As the organic colorant, for example, dyes, organic pigments, natural pigments, and the like can be used. Moreover, as an inorganic coloring agent, an inorganic pigment, an extender pigment, etc. can be used, for example. Specific examples of the dye include azo, quinone, triarylmethane, cyanine, and phthalocyanine dyes. Among these, a triarylmethane dye is preferable from the viewpoint of ensuring high color purity with respect to the blue pixel of the color filter. Further, from the viewpoint of realizing high color developability and high heat resistance, a pigment is preferable, and an organic pigment is more preferable.

Specific examples of the organic pigment include compounds classified as “Pigment” in the color index (CI; issued by The Society of Dyers and Colorists).
Examples of such compounds include C.I. I. Pigment yellow 1, C.I. I. Pigment yellow 3, C.I. I. Pigment yellow 12, C.I. I. Pigment yellow 138, C.I. I. Pigment yellow 139, C.I. I. Pigment Yellow 150, JP 2001-354869, JP 2005-325350, JP 2007-25687, JP 2007-23287, JP 2007-23288, similar to Pigment Yellow 150, Yellow pigments disclosed in JP-A-2008-24927, C.I. I. Pigment orange 38, C.I. I. Pigment orange 71, C.I. I. Pigment red 242, C.I. I. Pigment yellow 180, C.I. I. Yellow pigments such as C.I. Pigment Yellow 185; I. Pigment red 1, C.I. I. Pigment red 2, C.I. I. Pigment red 3, C.I. I. Pigment red 242, C.I. I. Pigment red 254, C.I. I. Red pigments such as C.I. Pigment Red 177; I. Pigment blue 15, C.I. I. Pigment blue 15: 3, C.I. I. Pigment blue 15: 4, C.I. I. C.I. Blue pigments such as CI Pigment Blue 15: 6; I. Violet pigments such as CI Pigment Violet 23; and C.I. I. Pigment green 7, C.I. I. Pigment green 36, C.I. I. And pigments having a color index (C.I.) number such as CI pigment green 58.

  Specific examples of inorganic colorants include titanium oxide, silica, barium sulfate, calcium carbonate, zinc white, lead sulfate, yellow lead, zinc yellow, red rose (red iron (III) oxide), cadmium red, ultramarine blue, and bitumen. Chrome oxide green, cobalt green, amber, titanium black, synthetic iron black, carbon black and the like.

Among these, when a red colored resin composition is used, C.I. I. Pigment red 177 and C.I. I. Preferably at least one selected from CI Pigment Red 254; I. Pigment red 254, C.I. I. A combination with CI Pigment Yellow 150; I. Pigment red 177, C.I. I. A combination with CI Pigment Yellow 150; I. Pigment red 254 and C.I. I. Pigment red 177, C.I. I. A combination with CI Pigment Yellow 150; I. Pigment Red 242 and C.I. I. A combination with CI Pigment Red 177; I. Pigment red 242 and C.I. I. Pigment red 177, C.I. I. A combination with CI Pigment Yellow 150; I. Pigment red 254 and C.I. I. A combination with Pigment Red 177 is more preferable.
In the case of a green colored resin composition, C.I. I. Pigment green 7, C.I. I. Pigment green 36, C.I. I. Pigment green 58, C.I. I. Pigment yellow 138, C.I. I. Pigment yellow 139 and C.I. I. Preferably at least one selected from CI Pigment Yellow 150; I. Pigment Green 58 and C.I. I. In combination with Pigment Yellow 138, C.I. I. Pigment Green 58 and C.I. I. A combination with CI Pigment Yellow 150 is more preferable.
Furthermore, when it is set as a blue coloring resin composition, C.I. I. Pigment blue 15, C.I. I. Pigment blue 15: 3, C.I. I. Pigment blue 15: 4, C.I. I. Pigment blue 15: 6 and C.I. I. Preferably at least one selected from CI pigment violet 23; I. Pigment blue 15: 6 and C.I. I. A combination with Pigment Violet 23 is more preferable.

The average particle diameter of the pigment used in the present invention is not particularly limited as long as it can produce a desired color when it is used as a colored layer of a color filter. It is preferably in the range of ˜200 nm, more preferably in the range of 10 to 100 nm. When the average particle diameter of the pigment is within the above range, a liquid crystal display device produced using the colored resin composition of the present invention can be made to have high contrast and high quality. In addition, with conventional pigment dispersants, as the particle size of the pigment becomes smaller, a large amount of pigment dispersant is required, which may cause problems such as reduced alkali developability and increased residue. Since the pigment dispersant used in the colored resin composition is excellent in alkali developability, it is less likely to cause such a problem. Therefore, as the average particle diameter of the pigment is within the above range, the characteristics of the colored resin composition of the present invention can be exerted as it is smaller than that in the past.
In addition, the average particle diameter of the pigment can be obtained by a method of directly measuring the size of primary particles from an electron micrograph. Specifically, the minor axis diameter and major axis diameter of each primary particle were measured, and the average was taken as the particle diameter of the particle. Next, for 100 or more particles, the volume (weight) of each particle was obtained by approximating the obtained particle size to a rectangular parallelepiped, and the volume average particle size was obtained and used as the average particle size. The same result can be obtained regardless of whether the electron microscope is a transmission type (TEM) or a scanning type (SEM).

  The ratio (hereinafter referred to as “P / V ratio”) of the mass (P) of the pigment (including pigments and dyes exemplified above) used in the present invention and the mass (V) of the solid content other than the pigment. Is not particularly limited as long as a desired color can be formed when the color layer is used as the color layer of the color filter, but it is preferably in the range of 0.15 to 1.0, 0.2 to More preferably within the range of 1.0, still more preferably within the range of 0.25 to 0.9, and particularly preferably within the range of 0.4 to 0.9. When the P / V ratio is within the above range, a colored resin composition capable of forming a colored layer capable of forming a desired color can be obtained, and further, the P / V ratio can be uniformly dispersed in the colored resin composition. it can.

In particular, when a red colored resin composition is used, the P / V ratio is preferably in the range of 0.2 to 0.9, preferably in the range of 0.3 to 0.8, from the viewpoint of desired color development. It is more preferable that it is in the range of 0.4 to 0.7.
Moreover, when setting it as a green coloring resin composition, it is preferable that the P / V ratio exists in the range of 0.3-1.1 from a viewpoint of desired coloring, and the range of 0.4-1.0 It is more preferable that it is in the range of 0.45 to 0.9. Among them, the red colored resin composition and the green colored resin composition are often required to increase the ratio of the pigment in the solid content of the composition due to the difference in coloring power between the color required by the color filter and the pigment. In the green colored resin composition, it is often necessary to increase the ratio of the pigment in the solid content of the composition as compared with the colored resin compositions of other colors. In such a case, water stains (patterns generated by water used for rinsing after development) are likely to occur. Therefore, the combination with the polyfunctional thiol compound mentioned later exhibits an effect especially.
Furthermore, when setting it as a blue coloring resin composition, it is preferable that P / V ratio exists in the range of 0.15-0.7 from a viewpoint of desired color development, 0.2-0.6 More preferably, it is in the range, and further preferably in the range of 0.25 to 0.5.
In addition, solid content is all except a solvent, and a liquid polyfunctional monomer etc. are also contained.

(Dispersant)
Any dispersant can be used as long as it can uniformly disperse the pigment, and a known dispersant can be used. Specific examples include polymer dispersants such as modified polyurethane, modified polyacrylate, modified polyester, and modified polyamide. Specific commercial product names include EFKA-4046, EFKA-4047, EFKA polymer 10, EFKA polymer 400, EFKA polymer 401, EFKA polymer 4300, EFKA polymer 4310, EFKA polymer 4320, EFKA polymer 4330 (above, BASF (Japan)), Disperbyk111, Disperbyk161, Disperbyk165, Disperbyk167, Disperbyk182, Disperbyk2000, Disperbyk2001, Disperbyk6919, Disperbyk2119, Disperbyk21L (SP) Manufactured tetrazole Ltd.), Ajisper manufactured by (R) PB821, PB822 (Ajinomoto Fine-Techno Co.) and the like.

The amine value of the dispersant is preferably in the range of 200 mgKOH / g or less, more preferably in the range of 50 to 180 mgKOH / g, and still more preferably in the range of 70 to 170 mgKOH / g, from the viewpoint of the stability of the dispersion. When the amine value is within the above range, the adsorption amount of the dispersant amine part is appropriate for the pigment surface-treated acidic, and the dispersion stability is improved.
The amine value indicates the amine value per gram of the solid content, and the amine value described in the present specification was determined by potentiometric titration using a 0.1N hydrochloric acid aqueous solution, and then converted into an equivalent of potassium hydroxide. Value. The functional group is preferably present at the resin terminal.
The weight average molecular weight of the dispersant is preferably in the range of 1,000 to 100,000 in terms of polystyrene, more preferably 1,000 to 30,000. When the weight average molecular weight is 1,000 or more, dispersion stability is improved, and when it is 100,000 or less, more preferably 30,000 or less, developability and resolution are improved.

  In addition, the dispersant used in the present invention is an amino acid from the viewpoint of improving the alkali developability, shortening the time required for alkali development, and expressing the effect that no unexposed colored composition remains on the substrate. A block copolymer in which a group and an acidic phosphate ester form a salt is preferable. As said block copolymer, what was described in Unexamined-Japanese-Patent No. 2008-242414 and Unexamined-Japanese-Patent No. 2010-237571 is mentioned, for example. Specifically, it has a structural unit (I) represented by the following general formula (13) and a structural unit (II) represented by the following general formula (14), and further has the structural unit (I). A block copolymer in which an amino group and an organic acid compound represented by the following general formula (15) and / or the following general formula (16) form a salt is preferable.

In formulas (13) to (14), R ⁴¹ is a hydrogen atom or a methyl group, R ⁴² and R ^{42 ′} are each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and A is each independently a carbon number. 1 to 8 alkylene groups, — [CH (R ⁴⁶ ) —CH (R ⁴⁷ ) —O] _x —CH (R ⁴⁶ ) —CH (R ⁴⁷ ) — or [(CH ₂ ) _y —O] _z — ( CH _{2) y} - ₂ divalent radical, R ⁴³ represented by an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl ^{group, - [CH (R 46)} -CH (R ⁴⁷ ) —O] _x —R ⁴⁸ or — [(CH ₂ ) _y —O] _z —R ⁴⁸ is shown.
R ⁴⁸ is a hydrogen atom, or an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, —CHO, —CH ₂ CHO, or —CH ₂ COOR ^52. Is a valent group. R ⁵² is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms. In R ⁴³ , R ⁴⁸ and R ⁵² , each of the alkyl group, alkenyl group, aralkyl group and aryl group may have a substituent.
In formulas (15) to (16), R ⁴⁴ and R ^{44 ′} are each independently a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, — [CH (R ⁴⁹ ) —CH (R ⁵⁰ ) —O] _a —R ⁵¹ , — [(CH ₂ ) _b —O] _c —R ⁵¹ , or —O—R ^{44 ″} a group, one of R ⁴⁴ and R ^{44 'comprises} a carbon atom. R ^{44 ″} represents an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, — [CH (R ⁴⁹ ) —CH (R ⁵⁰ ) —O] _a —R ^51. ,-[(CH ₂ ) _b —O] _c —R ⁵¹ .
R ⁴⁵ represents an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, — [CH (R ⁴⁹ ) —CH (R ⁵⁰ ) —O] _a —R ⁵¹ , — [(CH ₂ ) _b —O] _c —R ⁵¹ or a monovalent group represented by —O—R ^{45 ′} . R ^{45 ′} is an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, an aryl group, — [CH (R ⁴⁹ ) —CH (R ⁵⁰ ) —O] _a —R ⁵¹ , — [(CH ₂ ) _b —O] _c —R ⁵¹ is a monovalent group.
R ⁴⁶ , R ⁴⁷ , R ⁴⁹ and R ⁵⁰ are each independently a hydrogen atom or a methyl group, and R ⁵¹ is a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, An aralkyl group, an aryl group, —CHO, —CH ₂ CHO, —CO—CH═CH ₂ , —CO—C (CH ₃ ) ═CH ₂ or —CH ₂ COOR ⁵² ; ⁵² is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.
In R ⁴⁴ , R ^{44 ′} , R ^{44 ″} , R ⁴⁵ , R ^{45 ′} and R ⁵¹ , each of the alkyl group, alkenyl group, aralkyl group and aryl group may have a substituent.
In formulas (13) to (16), x and a are integers of 1 to 18, y and b are integers of 1 to 5, and z and c are integers of 1 to 18. m and n represent an integer of 1 to 200.

In the colored resin composition of the present invention, R ⁴⁴ , R ^{44 ′} and / or R ^{44 ″} in the general formula (15) and / or R ⁴⁵ and / or R ^{45 ′} in the general formula (16) are used. Are each independently a methyl group, an ethyl group, an aryl group or an aralkyl group, a vinyl group, an allyl group, or — [CH (R ⁴⁹ ) —CH (R ⁵⁰ ) —O], which may have a substituent. _a —R ⁵¹ or — [(CH ₂ ) _b —O] _c —R ⁵¹ , and R ⁵¹ is —CO—CH═CH ₂ or —CO—C (CH ₃ ) ═CH _2. From the viewpoint of excellent pigment dispersibility.

The content of the dispersant is preferably 0.5 to 35% by mass, more preferably 1 with respect to the total solid content of the colored resin composition, from the viewpoint of pigment dispersibility and developability of the colored resin composition. It is -30 mass%, More preferably, it is 5-25 mass%.
The pigment and the dispersant are preferably used as a pigment dispersion by mixing in a solvent described later from the viewpoint of dispersing a high-concentration pigment.

(Alkali-soluble resin)
The alkali-soluble resin used in the present invention plays a role as a binder in the formed pixel. The alkali-soluble resin used in the present invention is not particularly limited as long as it has good adhesion to the substrate. Alkali-soluble resin may be used individually by 1 type, and may use 2 or more types together.
As alkali-soluble resin used for this invention, what is generally used for the colored resin composition for color filters can be used, and if it is soluble in alkaline aqueous solution, it will not specifically limit.
Examples of the alkali-soluble resin used in the present invention include dispersibility, solubility in an alkaline aqueous solution (developability), and the ability of the dried product of the colored composition to dissolve again in the solvent contained in the colored composition (solvent resolubility). From the viewpoint of adjusting, an alkali-soluble resin having an acidic functional group and a cardo resin are preferable.

  The alkali-soluble resin and cardo resin having an acidic functional group may be used alone or in combination of two or more. When two or more of these resins are used in combination, the content of the alkali-soluble resin having an acidic functional group excluding the cardo resin is preferably 90% by mass or less, more preferably 75% by mass from the viewpoint of dispersion stability. Hereinafter, it is more preferably in the range of 50% by mass or less.

  Examples of the alkali-soluble resin having an acidic functional group include an alkali-soluble acrylic resin having a carboxyl group. Among these, a copolymer of a carboxyl group-containing unsaturated monomer and another copolymerizable ethylenically unsaturated monomer is preferable. Further, a compound having both an epoxy group and an ethylenically unsaturated group in the molecule, for example, a glycidyl (meth) acrylate etc. added thereto and an ethylenically unsaturated group introduced into the side chain is photopolymerizable as described later at the time of exposure. It can be preferably used because it can be polymerized with the monomer and the colored layer becomes more stable. Further, a copolymer obtained by copolymerizing a phenoxyethyl group-containing monomer and an acid group-containing monomer described in JP 2010-217529 A can be preferably used.

The acidic functional group is preferably one having an acid value of 10 to 150 mgKOH / g, more preferably 20 to 140 mgKOH / g, from the viewpoint of developability (solubility) in an aqueous alkali solution used in the developer. More preferred is 130 mg KOH / g.
The acid value can be measured according to JIS K 0070.

Examples of the carboxyl group-containing unsaturated monomer include (meth) acrylic acid, a dimer of acrylic acid (for example, trade name “M-5600” manufactured by Toa Gosei Chemical Co., Ltd.), itaconic acid, and croton. Acid, maleic acid, fumaric acid, vinyl acetic acid, succinic acid mono [2- (meth) acryloyloxyethyl], phthalic acid mono [2- (meth) acryloyloxyethyl], ω-carboxypolycaprolactone mono (meth) Examples thereof include one or more unsaturated carboxylic acids selected from acrylates and acid anhydrides thereof. Among them, (meth) acrylic acid, crotonic acid, maleic acid, maleic anhydride, succinic acid mono [2- (meth) acryloyloxyethyl], phthalic acid mono [2- (meth) acryloyloxyethyl], ω- Carboxypolycaprolactone mono (meth) acrylate and the like are preferable, and (meth) acrylic acid is particularly preferable. In addition, a carboxyl group-containing unsaturated monomer may be used individually by 1 type, and may use 2 or more types together.
As the carboxyl group-containing unsaturated monomer, for example, a compound represented by the following general formula (9) can also be used.

In formula (9), R ³¹ is a hydrogen atom or a methyl group, and R ³² , R ³³ , R ³⁴ and R ³⁵ are each independently a hydrogen atom or a hydrocarbon group having 1 to 6 carbon atoms, R ³² or R ³³ and R ³⁴ or R ³⁵ may form a ring.
V has at least an alkylene group, and the total number of carbon atoms and oxygen atoms in the chain length direction is in the range of 2 to 85, preferably in the range of 2 to 36, more preferably in the range of 2 to 15. Is a divalent organic group. V represents an ether bond (—O—), an ester bond (—O—C (═O) —), a thioether bond, a carbonyl bond, a thiocarbonyl bond, an amide bond, a urethane bond, an imino bond, an imide in addition to an alkylene group. A bond, a carbonate bond, and a sulfonyl bond can be included. When the total number of carbon atoms and oxygen atoms in the chain length direction is within the above range, the developability can be particularly excellent. The carbon atoms and oxygen atoms in the chain length direction refer to carbon atoms and oxygen atoms constituting a chain connecting both ends of the organic group V.

When the substituents R ^{32 to} R ³⁵ do not form a ring, the substituents R ^{32 to} R ³⁵ may be an unsaturated hydrocarbon group having a double bond, a triple bond or the like, or a saturated hydrocarbon group. Also good. The substituents R ^{32 to} R ³⁵ are preferably a hydrogen atom or a hydrocarbon group having 1 to 5 carbon atoms, more preferably a hydrogen atom or a hydrocarbon group having 1 to 3 carbon atoms, from the viewpoint of developability. When the substituents R ^{32 to} R ³⁵ in the present invention form a ring, the number of rings formed by the substituents R ^{32 to} R ³⁵ is usually one. In the present invention, the ring formed by the substituents R ^{32 to} R ³⁵ may be an unsaturated hydrocarbon group or a saturated hydrocarbon group. From the viewpoint of developability, a cyclic carbon atom having 4 to 10 carbon atoms. Hydrogen is preferred, and cyclic hydrocarbons having 5 to 6 carbon atoms are more preferred.
Specific examples of the compound represented by the general formula (9) include compounds represented by the following general formulas (9-1) to (9-2).

In formulas (9-1) to (9-3), R ^{31 to} R ³⁵ are the same as described above, and R ^{71 to} R ⁷⁸ are each independently hydrogen or a methyl group. f is an integer of 2 to 5, g and h are 0 or an integer of 1 to 10 (g and h are not 0 at the same time), i is an integer of 4 to 6, j is an integer of 1 to 10 is there. From the viewpoint of developability, f is an integer of 2 to 4, g and h are integers of 0 to 6 (g and h are not 0 at the same time), i is 4 or 5, and j is 1 to 5. It is preferably an integer.

  The content ratio of the structural unit derived from the carboxyl group-containing unsaturated monomer contained in the alkali-soluble resin having an acidic functional group is preferably in the range of 5 to 70 mol%, more preferably in the range of 10 to 60 mol%. More preferably, it is in the range of 20 to 50 mol%. If the content rate of the said structural unit is in the said range, it will become the thing excellent in the balance of developability and other performance.

Examples of the ethylenically unsaturated monomer include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, and s-butyl (meth). ) Acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, n-pentyl (meth) acrylate, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, n -Decyl (meth) acrylate, styrene, α-methylstyrene, N-vinyl-2-pyrrolidone, glycidyl (meth) acrylate, cyclohexyl (meth) acrylate, dicyclopentanyl (meth) acrylate, dicyclopentanyloxyethyl ( Meta) Chrylate, phenyl (meth) acrylate, benzyl (meth) acrylate, isobornyl (meth) acrylate, allyl (meth) acrylate, 2-dimethylaminoethyl (meth) acrylate, tricyclodecane (meth) acrylate, phenoxyethyl (meth) acrylate , Adamantyl (meth) acrylate and the like, and their macromonomers; N-substituted maleimides such as N-methylmaleimide, N-cyclohexylmaleimide, N-benzylmaleimide, N-phenylmaleimide, N-methylphenylmaleimide, etc., hydroxyethyl (Meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, hydroxyhexyl (meth) acrylate, hydroxyoctyl (meth) acrylate And ethylenically unsaturated monomers containing hydroxyl groups such as hydroxydecyl (meth) acrylate, hydroxylauryl (meth) acrylate, (4-hydroxymethylcyclohexyl) methyl methacrylate, and 2-methacryloyloxyethyl succinate. .
In addition, an ethylenically unsaturated monomer may be used individually by 1 type, and may use 2 or more types together.

  The cardo resin refers to a resin having a structure (cardo structure) in which two benzene rings are bonded to a fluorene skeleton represented by the following formula (8) in the molecule.

  The exact mechanism of the cardo resin is unknown, but since the fluorene skeleton contains a π-conjugated system, it is considered to be highly sensitive to radicals. The oxime ester photopolymerization initiator and cardo resin used in the present invention By combining them, required performance such as sensitivity, developability and adhesion can be satisfied. In addition, in the color filter manufacturing process, when adopting a die coating method in which a large substrate is formed at once in order to increase productivity efficiency, the aggregate of the colored composition dried at the die coating application port (lip) is peeled off and becomes a foreign matter. There's a problem. On the other hand, cardo resin has high performance (solvent re-solubility) to dissolve again in the solvent in the colored resin composition even after the colored resin composition has been dried, and therefore aggregates even at high dye concentrations. It is possible to design a colored resin composition having no product.

  As the cardo resin, an epoxy (meth) acrylate resin having a fluorene structure is preferable. For example, a polymerizable compound represented by the following general formula (10) described in JP-A-2007-119720, and JP-A-2006-2006 Preferable examples include a reaction product (polycondensate) of an epoxy (meth) acrylate having a fluorene skeleton and a polybasic acid described in Japanese Patent No. 308698.

Here, in the above formula (10), X represents a group represented by the following general formula (12), Y represents each independently a residue of a polyvalent carboxylic acid or an acid anhydride thereof, and R ⁶⁰ Represents a group represented by the following formula (11), j is an integer of 0 to 4, k is an integer of 0 to 3, and n is an integer of 1 or more.

In the above formula (11), R ⁶¹ represents a hydrogen atom or a methyl group, and R ⁶² independently represents a hydrogen atom or a methyl group.

Here, in the above formula (12), R ⁶³ is each independently a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a phenyl group, or a halogen atom, and R ⁶⁴ is —O— or —OCH ₂ CH ₂ O. -Is shown.

The cardo resin used in the present invention, for example, epoxidizes a fluorene bisphenol compound to form an epoxy compound of a fluorene bisphenol compound, and reacts with (meth) acrylic acid to form an epoxy (meth) acrylate, and this epoxy (meth) acrylate. Can be obtained by reacting with a polyvalent carboxylic acid or an acid anhydride thereof.
Preferred examples of the fluorene bisphenol compound include those in which R ⁶⁴ is —O— in the above formula (12), and —O— is —OH.
Examples of the fluorene bisphenol compound include 9,9-bis (4-hydroxyphenyl) fluorene, 9,9-bis (4-hydroxy-3-methylphenyl) fluorene, and 9,9-bis (4-hydroxy-3-methoxyphenyl). ) Fluorene, 9,9-bis (4-hydroxy-3,5-dimethylphenyl) fluorene, 9,9-bis (4-hydroxy-3-fluorophenyl) fluorene, 9,9-bis (4-hydroxy-3) -Chlorophenyl) fluorene, 9,9-bis (4-hydroxy-3-bromophenyl) fluorene, 9,9-bis (4-hydroxy-3,5-dichlorophenyl) fluorene, 9,9-bis (4-hydroxy-) Bisphenol compounds such as 3,5-dibromophenyl) fluorene, and mixtures thereof.

The polyvalent carboxylic acid used in the reaction of the epoxy (meth) acrylate resin having a fluorene skeleton and the acid anhydride thereof include maleic acid, succinic acid, itaconic acid, phthalic acid, tetrahydrophthalic acid, hexahydrophthalic acid Dicarboxylic acids such as methyltetrahydrophthalic acid, methylendomethylenetetrahydrophthalic acid, chlorendic acid, methyltetrahydrophthalic acid, glutaric acid or their acid anhydrides; biphenyltetracarboxylic acid, benzophenonetetracarboxylic acid, biphenylethertetracarboxylic acid, Tetracarboxylic acid such as biphenylsulfonetetracarboxylic acid, 4- (1,2-dicarboxyethyl) -1,2,3,4-tetrahydronaphthalene-1,2-dicarboxylic acid, butanetetracarboxylic acid, pyromellitic acid or the like That Dianhydride; trimellitic acid or tricarboxylic acids or their anhydrides of the acid anhydrides and the like. These can be used independently and can also use 2 or more types together.
The cardo resin used in the present invention is preferably an epoxy (meth) acrylate having a fluorene skeleton which is an addition product of a fluorene epoxy (meth) acrylic acid derivative and a dicarboxylic acid anhydride and / or tetracarboxylic dianhydride. An acid adduct is mentioned.
As a trade name of a commercially available cardo resin that can be used in the present invention, INR-16M (manufactured by Nagase Chemtech Co., Ltd.) and the like can be mentioned.

The content of the alkali-soluble resin is preferably 5 to 60% by mass, more preferably 10 to 50% by mass, and further preferably 15 to 40% by mass with respect to the total solid content of the colored resin composition of the present invention. When the content of the alkali-soluble resin is within this range, the adhesion between the formed pixel and the substrate tends to be good.
The weight average molecular weight of the alkali-soluble resin is preferably 1,000 to 100,000, more preferably 5,000 to 50,000, and still more preferably, from the viewpoint of the adhesion between the formed pixel and the substrate. 5,000 to 15,000. In the present specification, the weight average molecular weight is a value in terms of polystyrene measured by gel permeation chromatography (GPC).

(Photopolymerizable monomer)
The photopolymerizable monomer used in the present invention is not particularly limited as long as it can be polymerized by a photoinitiator described later, and usually a compound having two or more ethylenically unsaturated double bonds is used. A compound having two or more ethylenically unsaturated double bonds is a compound that undergoes a polymerization reaction when irradiated with light in the presence of a photopolymerization initiator and can be a binder in a colored resin composition. It can serve as a binder in the remaining pixels. Examples of the compound having two or more ethylenically unsaturated double bonds include polyfunctional monomers. Among these, in particular, a bifunctional (meth) acrylate and a trifunctional or higher (meth) acrylate having two or more (meth) acryloyl groups are preferable, and a trifunctional or higher (meth) acrylate is more preferable. A compound having two or more ethylenically unsaturated double bonds may be used alone or in combination of two or more.

  Examples of the bifunctional (meth) acrylate include ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, hexanediol (meth) acrylate, long chain aliphatic di (meth) acrylate, and neopentyl glycol di (meth). Acrylate, hydroxypivalate neopentyl glycol di (meth) acrylate, stearic acid-modified pentaerythritol di (meth) acrylate, propylene di (meth) acrylate, glycerol (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol Di (meth) acrylate, tetramethylene glycol di (meth) acrylate, butylene glycol di (meth) acrylate, dicyclopentanyl di (meth) acrylate Polyethylene glycol di (meth) acrylate, polypropylene di (meth) acrylate, triglycerol di (meth) acrylate, neopentyl glycol modified trimethylolpropane di (meth) acrylate, allylated cyclohexyl di (meth) acrylate, methoxylated cyclohexyl di ( (Meth) acrylate, acrylated isocyanurate, bis (acryloxyneopentyl glycol) adipate, bisphenol A di (meth) acrylate, tetrabromobisphenol A di (meth) acrylate, bisphenol S di (meth) acrylate, butanediol di (meth) ) Acrylate, phthalic acid di (meth) acrylate, phosphoric acid di (meth) acrylate, zinc di (meth) acrylate, and the like.

  Examples of the tri- or higher functional (meth) acrylate include trimethylolpropane tri (meth) acrylate, trimethylolethane tri (meth) acrylate, glycerol tri (meth) acrylate, pentaerythritol di (meth) acrylate, pentaerythritol tri ( (Meth) acrylate, alkyl-modified dipentaerythritol tri (meth) acrylate, tri (meth) acrylate phosphate, tris (acryloxyethyl) isocyanurate, tris (methacryloxyethyl) isocyanurate, pentaerythritol tetra (meth) acrylate, di Pentaerythritol tetra (meth) acrylate, ditrimethylolpropane tetraacrylate, alkyl-modified dipentaerythritol tetra (meth) acrylate, dipe Taerythritol monohydroxypenta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, dipentaerythritol penta (meth) acrylate, alkyl-modified dipentaerythritol penta (meth) acrylate, carboxylic acid-modified dipentaerythritol penta (meth) Trifunctional or higher functional (meth) acrylates such as acrylate, urethane tri (meth) acrylate, ester tri (meth) acrylate, urethane hexa (meth) acrylate, and ester hexa (meth) acrylate may be mentioned.

In the present invention, a part of the photopolymerizable monomer can be replaced with a monofunctional monomer having one polymerizable unsaturated bond.
Monofunctional monomers are preferably (meth) acrylates, such as allyl (meth) acrylate, benzyl (meth) acrylate, butoxyethyl (meth) acrylate, butoxyethylene glycol (meth) acrylate, cyclohexyl (meth) acrylate, and dicyclohexane. Pentanyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, glycerol (meth) acrylate, glycidyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, isobornyl (meth) acrylate , Isodexyl (meth) acrylate, isooctyl (meth) acrylate, lauryl (meth) acrylate, 2-methoxyethyl (meth) acrylate, methoxyethyleneglycol Le (meth) acrylate, phenoxyethyl (meth) acrylate, stearyl (meth) acrylate.

  The content of the photopolymerizable monomer is preferably 5 to 60% by mass, more preferably 5 to 40% by mass with respect to the total solid content of the colored resin composition of the present invention. When the content of the photopolymerizable monomer is within this range, the adhesion between the formed pixel and the substrate becomes good.

(Photopolymerization initiator)
The photopolymerization initiator used in the present invention contains a compound represented by the following general formula (1).

In formula (1), R ^{1 to} R ¹¹ are each independently a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms. Group, substituted or unsubstituted cycloalkyl group having 3 to 10 ring atoms, substituted or unsubstituted cycloalkenyl group having 4 to 20 carbon atoms, hydroxyl group, substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms Substituted or unsubstituted alkenyloxy group having 2 to 20 carbon atoms, substituted or unsubstituted alkanoyl group having 1 to 20 carbon atoms, alkenoyl group having 2 to 20 carbon atoms, substituted or unsubstituted ring forming carbon atoms having 6 to 6 carbon atoms 14 aryl groups or substituted or unsubstituted heterocyclic groups having 3 to 14 ring atoms. R ³ may form a ring together with R ⁴ or R ⁵ . R ⁴ may form a ring together with R ⁵ .
Ar represents a substituted or unsubstituted aryl group having 6 to 14 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 14 ring atoms.
W represents a single bond or an oxygen atom. Z represents a single bond, an oxygen atom, or> NR ³ ′ (R ³ ′ represents a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or R ³ ′ is connected to R ³ together with a nitrogen atom. Forming a ring).
n represents an integer of 1 to 10. When n is an integer of 2 to 10, a plurality of R ⁴ and R ⁵ may be the same or different.

In the formula (1), n is preferably an integer of 2 to 8, more preferably an integer of 2 to 4, from the viewpoint of low molecular weight, solubility in a solvent and ease of production. Is more preferable.
As a halogen atom which R < ¹ > -R < ¹¹ > shows each independently, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom etc. are mentioned, for example.
The alkyl group having 1 to 20 carbon atoms independently represented by R ^{1 to} R ¹¹ may be linear or branched. For example, methyl, ethyl, n-propyl, isopropyl, n-butyl Group, isobutyl group, t-butyl group, n-pentyl group, isopentyl group, n-hexyl group, n-octyl group, 2-ethyl-n-octyl group, n-decyl group, n-dodecyl group and the like. .
The alkenyl group having 2 to 20 carbon atoms independently represented by R ^{1 to} R ¹¹ may be linear or branched, and examples thereof include a vinyl group, an allyl group, and a 7-octenyl group.
Examples of the cycloalkyl group having 3 to 10 ring atoms independently represented by R ^{1 to} R ¹¹ include a cyclopropyl group, a cyclopentyl group, a cyclohexyl group, and a cyclooctyl group.
Examples of the C 4-20 cycloalkenyl group independently represented by R ^{1 to} R ¹¹ include a cyclopentenyl group, a cyclohexenyl group, a cyclohexadienyl group, a cyclooctenyl group, and the like.

As C1-C20 alkoxy group which R < ¹ > -R < ¹¹ > shows each independently, what an alkyl group site | part is an above-described C1-C20 alkyl group is mentioned.
Examples of the alkenyloxy group having 2 to 20 carbon atoms independently represented by R ^{1 to} R ¹¹ include those in which the alkenyl group moiety is the aforementioned alkenyl group having 2 to 20 carbon atoms.
The alkanoyl group having 1 to 20 carbon atoms independently represented by R ^{1 to} R ¹¹ may be linear or branched. For example, methanoyl group, ethanoyl group, n-propanoyl group, isopropanoyl group, n -Butanoyl group, t-butanoyl group, n-hexanoyl group, n-octanoyl group, n-decanoyl group, n-dodecanoyl group, etc. are mentioned.
The alkenoyl group having 2 to 20 carbon atoms independently represented by R ^{1 to} R ¹¹ may be linear or branched. For example, ethenoyl group, n-propenoyl group, isopropenoyl group, n-butenoyl group, t -Butenoyl group, n-hexenoyl group, n-octenoyl group, n-decenoyl group, n-dodecenoyl group, etc. are mentioned.

Examples of the aryl group having 6 to 14 ring carbon atoms independently represented by R ^{1 to} R ¹¹ include a phenyl group, a naphthyl group, and an anthryl group.
Examples of the heterocyclic group having 3 to 14 ring atoms independently represented by R ^{1 to} R ¹¹ include a 2-furanyl group, a 2-thiophenyl group, a 2-pyridinyl group, and the following formula (A). An unsaturated heterocyclic group having 5 to 14 ring atoms such as a group (hereinafter referred to as substituent (A)); 2-tetrahydrofuryl group, 3-tetrahydrofuryl group, pyrrolidinyl group, piperidinyl group, 2,2 , 6,6-trimethylpiperidin-4-yl group and the like, and a saturated heterocyclic group having 3 to 10 ring atoms.

  Among these, from the viewpoint of low molecular weight, from the viewpoint of solubility in a compound or solvent having an ethylenically unsaturated double bond, and from the viewpoint of ease of production, an alkyl group having 1 to 10 carbon atoms, preferably a carbon number An alkenyl group having 2 to 10 carbon atoms, a cycloalkyl group having 3 to 6 ring atoms, a cycloalkenyl group having 4 to 10 carbon atoms, an alkenyloxy group having 2 to 10 carbon atoms, an alkanoyl group having 1 to 10 carbon atoms, and a carbon number An alkenoyl group having 2 to 10 atoms, an unsaturated heterocyclic group having 5 to 6 ring atoms, and a saturated heterocyclic group having 3 to 6 ring atoms. More preferably, the alkyl group having 1 to 5 carbon atoms, the alkenyl group having 2 to 6 carbon atoms, the cycloalkenyl group having 4 to 6 carbon atoms, the alkenyloxy group having 2 to 6 carbon atoms, and the alkanoyl having 1 to 5 carbon atoms. Group, an alkenoyl group having 2 to 6 carbon atoms.

The above-mentioned “R ³ and R ⁴ or R ⁵ together form a ring” means that in the formula (1), n = 2, W is a single bond, and Z is an oxygen atom. Is exemplified by the following formula, and the ring exemplified on the right side is given as a specific example.

Examples of the ring formed by combining R ⁴ and R ⁵ include rings having 3 to 10 (preferably 3 to 6) ring carbon atoms such as a cyclopentyl ring and a cyclooctyl ring.

In the formula (1), R ^{1 to} R ¹¹ each independently represent the alkyl group, alkenyl group, cycloalkyl group, cycloalkenyl group, alkoxy group, alkenyloxy group, alkanoyl group, alkenoyl group, aryl. The group and the heterocyclic group may have a substituent.
Examples of the substituent include a hydroxy group, a carboxyl group, a linear or branched alkoxy group having 1 to 18 carbon atoms such as a methoxy group, an ethoxy group, or a propoxy group; a linear or branched carbon number of 2 -18 alkenyloxy group; linear or branched alkenylthio group having 2 to 18 carbon atoms; linear or branched alkylthio group having 1 to 18 carbon atoms; straight chain such as vinyl group and allyl group A chain or branched alkenyl group having 2 to 18 carbon atoms; a cycloalkenyl group having 5 to 18 carbon atoms; a cycloalkyl group having 3 to 18 carbon atoms such as a cyclopropyl group, a cyclopentyl group, and a cyclohexyl group; a phenoxy group and the like An aryloxy group having 6 to 10 ring carbon atoms; halogen atom such as fluorine atom, chlorine atom, bromine atom and iodine atom; oxygen atom (═O); sulfur atom (═S); cyano group; A trialkylsilyl group such as a trimethylsilyl group; a trialkoxysilyl group such as a trimethoxysilyl group; a linear or branched alkyl group having 1 to 18 carbon atoms such as a methyl group or an ethyl group; a phenyl group, a naphthyl group, ring forming an aryl group having 6 to 14 carbon atoms such as an anthryl ^{group; -COR 12; -OCOR 13; -NR} 14 R 15; -NHCOR 16; -NHCOOR 17; -CONR 18 R 19; -COOR 20; -SO 3 NR ²¹ R ²² ; —SO ₃ R ²³ ; cyclic ether group having 3 to 6 ring atoms such as epoxy group and tetrahydrofuranyl group, 2-thienyl group, 2-pyridyl group, furyl group, thiazolyl group, benzothiazolyl group, Examples thereof include a morpholino group and a saturated or unsaturated heterocyclic group having 3 to 10 ring atoms such as the substituent (A).
In the general formula, R ^{12 to} R ²³ each independently represent a linear or branched alkyl group having 1 to 20 carbon atoms or an aryl group having 6 to 14 ring carbon atoms. Examples of the alkyl group and aryl group include the same groups as in R ^{1 to} R ¹¹ .

Examples of the aryl group having 6 to 14 ring carbon atoms represented by Ar include a phenyl group, a naphthyl group, an anthryl group, a chrycenyl group, a phenanthrenyl group, an azulenyl group, and an acenaphthylenyl group. Examples of the heteroaryl group having 5 to 14 ring atoms represented by Ar include a 2-furanyl group, a 2-thiophenyl group, and a 2-pyridinyl group.
Among these, an aryl group having 6 to 10 ring carbon atoms and a heteroaryl group having 5 to 6 ring atoms are preferable from the viewpoint of low molecular weight, solubility in a solvent, and ease of production. More preferred are a phenyl group, a 2-furanyl group, and a 2-thiophenyl group.
These aryl groups and heteroaryl groups may have a substituent. Examples of the substituent include the same ones as described above.
In addition, when this substituent is an alkyl group or an alkenyl group, it may form a condensed ring with Ar, for example, a fluorene ring, an indene ring, or the like.
Z represents> NR ³ 'R ^3' in has, as described above, or a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or R ³ 'is connected to the R ^3, ring together with the nitrogen atom Is forming.
As the alkyl group of carbon number 1 to 20, it includes the same ones as in R ¹ to R ^11, preferably also the same thing can be mentioned those, a methyl group is particularly preferred.
Specific examples of the ring formed by connecting R ³ 'to R ³ together with the nitrogen atom include a morpholine ring, a pyrrolidine ring, a piperidine ring, a pipecoline ring, and a piperazine ring. Among these, a morpholine ring is preferable.
As a combination of W and Z, when W is a single bond, Z is preferably an oxygen atom or> Nr ³ ′, and when W is an oxygen atom, Z is preferably a single bond or an oxygen atom.

Furthermore, in the general formula (1), (a) R ¹ , R ² and R ³ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, n is 2, R ⁴ and R ⁵ are each independently a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, and Ar is a substituted or unsubstituted aryl group having 6 to 14 ring carbon atoms. (B) R ¹ , R ² and R ³ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, n is 2, and a plurality of R ⁴ and R Photopolymerization initiation wherein ⁵ is independently a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, and Ar is a substituted or unsubstituted heteroaryl group having 5 to 14 ring carbon atoms agents, (c) R ¹ and R ² are each independently also substituted Ku is an alkyl group having 1 to 20 carbon atoms unsubstituted, R ³ is cycloalkyl group having 3 to 18 carbon atoms substituted or unsubstituted, n is 2, a plurality of R ⁴ and R ⁵ , Each independently a photopolymerization initiator which is a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, (d) R ¹ and R ² are each independently substituted or unsubstituted carbon number 1 An alkyl group having ˜20, R ³ is an alkyl group having 1 to 20 carbon atoms substituted with a cyclic ether group having 3 to 6 ring atoms, n is 2, and a plurality of R ⁴ and R ⁵ However, the photoinitiator which is a hydrogen atom or a substituted or unsubstituted C1-C20 alkyl group each independently is also preferable. Furthermore, from the viewpoint of reducing the content of the photopolymerization initiator, in the cases (a) and (b), the molecular weight is preferably 515 or less, more preferably 500 or less, and (c) In the case of (d), the molecular weight is preferably 550 or less.
Furthermore, from the viewpoint of the effect of the present invention and from the viewpoint of reducing contamination of the polymer by the decomposition product of the photopolymerization initiator and contamination of the apparatus, in the preferable photopolymerization initiator, R ^{4 to} R ¹¹ are each independently More preferably a hydrogen atom or an alkyl group having 1 to 20 carbon atoms. In addition, the preferable thing of each group is as above-mentioned.

  The photopolymerization initiator is preferably n = 2 in the general formula (1) as described above, specifically, a compound represented by the following general formula (2) is preferable, and the following general formula (3) It is more preferable that it is at least any compound represented by (7).

In the formula (2), R ^{1 to} R ¹¹ and Ar are as defined in the general formula (1), and preferred ones are also the same.
Although there is no restriction | limiting in particular in the manufacturing method of the photoinitiator represented by the said General formula (1), By the method described in the said patent document 2, it can manufacture easily.

In the present invention, from the viewpoint of forming micropixels, as the photopolymerization initiator, the compound represented by the general formula (1) and another photopolymerization initiator (hereinafter also simply referred to as “other photopolymerization initiator”). ) In combination.
The other photopolymerization initiator is preferably at least one selected from acetophenone series, benzophenone series, thioxanthone series and imidazole series photopolymerization initiators.
The photopolymerization initiators have different wavelength sensitivities depending on the type, radical generation mechanisms and radical lifetimes are different, and the degree of cure distribution in the film is different. Therefore, it is considered that the type of the photopolymerization initiator affects the pattern line width accuracy after alkali development and the end shape of the pattern. Other material compositions other than the photopolymerization initiator also affect the pattern end shape, but the pattern end shape can be controlled to a desired shape by appropriately selecting the photopolymerization initiator.
Here, the example of the SEM image which observed the edge part shape of the pattern from the side surface direction with the scanning electron microscope (10000-times multiplication factor) is shown in FIG. FIG. 3 is a schematic cross-sectional view of the SEM image of the pattern end shape shown in FIG. The end shape of the pattern is a forward taper type in which the inclination angle θ shown in (a) of FIG. 3 is larger than about 90 °, a rectangular type in which the inclination angle θ shown in (b) of FIG. 3 (c), it is divided into the reverse taper type smaller than the vicinity of the inclination angle θ90 °. Among these, as the pattern end shape, from the viewpoint of preventing disconnection of a transparent electrode such as ITO formed on the colored layer and reducing the step between each color when sequentially forming a plurality of colors, the forward taper type and A rectangular shape is preferable, and a forward taper type is more preferable.

For example, imidazole-based photopolymerization initiators suppress the phenomenon of “debris” that occurs when a thin wire is formed due to the long radical life and curing in the depth direction of the coating film. It is easy to form a forward taper type as shown in FIGS. The thioxanthone photopolymerization initiator forms a forward taper type as shown in FIG. 2 and FIG. 3A or a rectangular type as shown in FIG. 2 and FIG. The benzophenone-based and acetophenone-based photopolymerization initiators have a rectangular shape as shown in FIG. 2 and FIG. 3B, or as shown in FIG. 2 and FIG. It is easy to form a reverse taper type.
As the other photopolymerization initiator, at least two or more selected from acetophenone-based, benzophenone-based, thioxanthone-based, and imidazole-based photopolymerization initiators are used from the viewpoint of forming a thin line and controlling the cross-sectional shape of the end portion of the pattern. It is preferable to combine imidazole and one or more selected from acetophenone, benzophenone, and thioxanthone.

  Examples of the acetophenone photopolymerization initiator include diethoxyacetophenone, 2-hydroxy-1- [4- (2-hydroxyethoxy) phenyl] -2-methylpropan-1-one, and 2-benzyl-2-dimethylamino. -1- (4-morpholinophenyl) -butanone-1,2- (dimethylamino) -2-[(4-methylphenyl) methyl] -1- [4- (4-morpholinyl) phenyl] -1-butanone, Benzyldimethyl ketal, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 2-hydroxy-1- {4- [4- (2-hydroxy-2-methyl-propionyl) -benzyl] pheni } -2-methyl-1-one, and 2,2-dimethoxy-like. Among them, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone-1 and 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one are shown in FIG. It is easy to form a rectangular shape as shown in FIG.

  Examples of the benzophenone photopolymerization initiator include benzophenone, 4-phenylbenzophenone, 4-benzoyl-4′-methyldiphenyl sulfide, 3,3 ′, 4,4′-tetra (tert-butylperoxycarbonyl) benzophenone, 2,4,6-trimethylbenzophenone, 4,4′-bis-dimethylaminobenzophenone and the like, and 4,4′-bis-dimethylaminobenzophenone is a rectangular type as shown in FIG. 2 and FIG. It is easy to form and is preferable.

  Examples of the thioxanthone photopolymerization initiator include 2- and 4-isopropylthioxanthone, 2,4-diethylthioxanthone, 1-chloro-4-propoxythioxanthone, 2,4-dichlorothioxanthone, and the like. Among these, 2,4-diethylthioxanthone is preferable because it is easy to form a forward taper type as shown in FIGS.

Examples of the imidazole photopolymerization initiator include hexaarylbisimidazole compounds. Examples of these compounds include 2,2′-bis (o-chlorophenyl) -4,4 ′, 5,5′-. Tetraphenylbisimidazolyl, 2,2′-bis (o-chlorophenyl) -4,4 ′, 5,5′-tetra- (p-methoxyphenyl) bisimidazolyl, 2,2′-bis (2-chlorophenyl)- 4,4 ′, 5,5′-tetraphenyl-1,2′-biimidazole and the like. Among them, 2,2′-bis (2-chlorophenyl) -4,4 ′, 5,5′-tetraphenyl-1,2′-biimidazole is a forward taper as shown in FIG. 2 and FIG. It is preferable because a mold can be easily formed.
These other photopolymerization initiators can be used alone or in combination of two or more with the photopolymerization initiator of the general formula (1).

The content of the photopolymerization initiator is preferably 2 to 40% by mass, more preferably 3 to 35% by mass, based on the total solid content of the colored resin composition of the present invention, from the viewpoints of sensitivity, resolution and developability. More preferably, it is 4-30 mass%.
The content of the photopolymerization initiator represented by the general formula (1) is preferably 2 to 35 mass with respect to the total solid content of the colored resin composition of the present invention, from the viewpoints of sensitivity, resolution, and developability. %, More preferably, it is 2-30 mass%, More preferably, it is 2-25 mass%.
When the photopolymerization initiator represented by the general formula (1) and the other photopolymerization initiator are used in combination, the photopolymerization initiator used in the present invention is represented by the general formula (1). The photopolymerization initiator is preferably contained in an amount of 40% by mass or more, more preferably 50% by mass or more, and further preferably 55% by mass or more.

The contents of the acetophenone-based, benzophenone-based, thioxanthone-based, and imidazole-based photopolymerization initiators are as follows. In addition, content shown below is the quantity with respect to solid content whole quantity of the colored resin composition of this invention.
The total content of the acetophenone-based, benzophenone-based, thioxanthone-based, and imidazole-based photopolymerization initiators is preferably 0.05 to 30 from the viewpoint of controlling chip shape, forming desired thin lines, and controlling the cross-sectional shape of the end portion of the pattern. It is 0.5 mass%, More preferably, it is 0.5-25 mass%, More preferably, it is 1-20 mass%.
The content of each of the acetophenone-based photopolymerization initiator and the benzophenone-based photopolymerization initiator is preferably 0.05 to from the viewpoint of easily forming a rectangular shape as shown in FIG. 2 and FIG. 30 mass%, More preferably, it is 0.1-25 mass%, More preferably, it is 0.2-20 mass%.
The content of each of the thioxanthone photopolymerization initiator and the imidazole photopolymerization initiator is preferably 0.05 from the viewpoint of easily forming a forward taper type as shown in FIG. 2 and FIG. It is -30 mass%, More preferably, it is 0.1-25 mass%, More preferably, it is 0.2-20 mass%.

The content of each photopolymerization initiator with respect to the total content of acetophenone-based, benzophenone-based, thioxanthone-based and imidazole-based photopolymerization initiators (hereinafter simply referred to as “total content”) contained in the colored resin composition of the present invention. The ratio (mass ratio) is as follows.
The content (mass ratio) of the acetophenone photopolymerization initiator and the content (mass ratio) of the benzophenone photopolymerization initiator with respect to the total content are rectangular as shown in FIG. 2 and FIG. 3 (b), respectively. From the viewpoint of facilitating the formation of the mold, it is preferably 3 to 100, more preferably 25 to 100, and still more preferably 25 to 75.
The content (mass ratio) of the thioxanthone photopolymerization initiator and the content (mass ratio) of the imidazole photopolymerization initiator with respect to the total content are in the order shown in FIGS. 2 and 3 (a), respectively. From the viewpoint of facilitating the formation of the taper type, it is preferably 2 to 100, more preferably 25 to 100, and still more preferably 25 to 75.
The total content (mass ratio) of the imidazole photopolymerization initiator and the thioxanthone photopolymerization initiator with respect to the total content makes it easy to form a forward taper type as shown in FIG. 2 and FIG. From a viewpoint, Preferably it is 5-100, More preferably, it is 25-100, More preferably, it is 50-100.

(Surfactant)
The colored resin composition of the present invention contains a silicone-based and / or fluorine-based surfactant for the purpose of improving the surface roughness of the film due to a high pigment concentration.
Silicone surfactants include polyether-modified polydimethylsiloxane, polyether-modified polymethylalkylsiloxane, aralkyl-modified polymethylalkylsiloxane, polyester-modified hydroxyl group-containing polydimethylsiloxane, polyetherester-modified hydroxyl group-containing polydimethylsiloxane, carboxyl-modified Examples thereof include polyorganosiloxane. Among these, polyether-modified polydimethylsiloxane and polyester-modified hydroxyl group-containing polydimethylsiloxane are preferable. As a commercially available product of the silicone-based surfactant, BYK series manufactured by Big Chemie Japan Co., Ltd., TSL series manufactured by Momentive Performance Materials Japan LLC, and the like are preferably used.

The fluorosurfactant refers to a surfactant containing fluorine. The fluorinated surfactant is usually one obtained by substituting all or part of the hydrogen atoms of the hydrophobic group of the hydrocarbon surfactant with fluorine atoms. Specifically, the fluorochemical surfactant described in Japanese Patent No. 4522915 can be used.
The fluorosurfactant used in the present invention includes a fluorinated alkyl group and an ethylenic group from the viewpoint of preventing surface roughness of the formed film (pixel) even if the P / V ratio of the colored resin composition is high. A fluorine-based copolymer polymerized by using at least the monomer (A) containing a double bond and the monomer (B) containing a silicone chain and an ethylenic double bond is preferable. Among them, a fluorine-based polymer obtained by polymerizing at least a monomer represented by the following general formula (a-1) as the monomer (A) and a monomer represented by the following general formula (b-1) as the monomer (B). Polymerized using at least a copolymer, or a monomer represented by the following general formula (a-2) as the monomer (A), and a monomer represented by the following general formula (b-2) as the monomer (B). More preferred are fluorine-based copolymers.

  As commercial products of fluorosurfactants, Megafac R-08MH, Megafac F445, Megafac F470, Megafac F471, Megafac F472SF, and Megafac F475 manufactured by DIC Corporation are preferably used. Among these, MegaFuck R-08MH is more preferably used.

Fluorosurfactants tend to exist in the vicinity of the surface of the coating film to be formed, and control the evaporation rate of the solvent by the presence of fluorine-containing groups (hydrophobic groups) at the gas-liquid interface. It is effective and realizes excellent uniform coating properties (leveling properties).
In the present invention, when the dye concentration is high, the resin content is relatively small as compared with the conventional one. Therefore, the compatibility between the fluorosurfactant and the alkali-soluble resin is preferably high. If the fluorine-containing surfactant-free group (philic group) and the alkali-soluble resin contained in the colored resin composition have good compatibility, the fluorine-based surfactant is uniformly present near the surface. By doing so, excellent uniform coating properties can be exhibited, the roughness of the film surface can be reduced, and a smooth film (pixel) can be formed. On the other hand, if the compatibility is low, the hydrophobic group cannot move to the gas-liquid interface, so that uniform coatability cannot be obtained, and the roughness of the film surface cannot be improved.
In addition, when a batch coating method such as a die coating method, a slit spin method, or a spin coating method is applied as a coating method of the colored resin composition, a fluorosurfactant is used to obtain sufficient smoothness of the film (pixel). It is necessary that the compatibility between the resin and the resin is good. In particular, sufficient compatibility is required in the die coating method, which is a method of batch coating with a large substrate. In the present invention, uniform coating properties can be obtained even when the batch coating method is applied by using the fluorine-based surfactant having the above structure.
The photopolymerization initiator represented by the general formula (1) is, for example, a conventional oxime ester photopolymerization initiator described in Patent Document 1 and the other photopolymerization initiator. Is highly sensitive, and the film surface has a high curing rate, so that the degree of film surface curing (depth) is uniform. Therefore, the fluorosurfactant present on the film surface can be fixed uniformly, and the film surface roughness can be reduced. From the above viewpoint, it is preferable to combine the photopolymerization initiator represented by the general formula (1) and the fluorosurfactant.

  Content of surfactant is 0.001-5 mass% with respect to solid content whole quantity of a colored resin composition. If the content of the surfactant is within the above range, it is possible to prevent surface roughness of the formed fine pixels even if the P / V ratio is high. From the above viewpoint, 0.01 to 0.5% by mass is further preferable, and 0.02 to 0.2% by mass is more preferable.

(Sensitizer)
The colored resin composition of the present invention may contain a sensitizer as necessary. The sensitizer absorbs the irradiated energy when it is exposed after applying the colored resin composition of the present invention on the substrate, and the absorbed energy contributes to the reaction initiation of the photopolymerization initiator, It is a substance that plays a role in the reaction chain.
As a sensitizer used for this invention, a monofunctional thiol compound and a polyfunctional thiol compound are preferable, and a polyfunctional thiol compound is more preferable. These may be used individually by 1 type and may use 2 or more types together.

  Monofunctional thiol compounds include 2-mercaptobenzothiazole, 2-mercaptobenzimidazole, 2-mercaptobenzoxazole, 2-mercaptobenzothiazole, 2-mercaptomethylbenzimidazole, 2-mercaptomethylbenzoxazole, 2-mercaptomethylbenzo Examples include thiazole. Among them, 2-mercaptomethylbenzothiazole is preferable from the viewpoint of chain transfer of a radical generated by a photopolymerization initiator, particularly an imidazole photopolymerization initiator, and improving curability.

  The polyfunctional thiol compound is not particularly limited, and various compounds can be used. For example, 1,2-ethanedithiol, 1,3-propanedithiol, 1,4-butanedithiol, 1,6-hexanedithiol, 1,8-octanedithiol, 1,2-cyclohexanedithiol, decanedithiol, ethylene glycol Bisthioglycolate, ethylene glycol bis (3-mercaptopropionate), ethylene glycol bisthioglycolate, 1,4-butanediol dithioglycolate, 1,4-butanediol bis (3-mercaptopropionate), Trimethylolpropane tristhioglycolate, trimethylolpropane tris (3-mercaptopropionate), pentaerythritol tetrakisthioglycolate, pentaerythritol tetrakis (3-mercaptopropionate), dipentaeri Ritoruhekisa (3-mercaptopropionate), and other various polyhydric alcohols and thioglycolic acid, esters of thiol group-containing carboxylic acids such as mercaptopropionic acid.

  Examples of the polyfunctional thiol compound include trimercaptopropionic acid tris (2-hydroxyethyl) isocyanurate, 1,4-dimethylmercaptobenzene, 2,4,6-trimercapto-s-triazine, 2- (N, N -Dibutylamino) -4,6-dimercapto-s-triazine and the like. Also, 2,5-hexanedithiol, 2,9-decanedithiol, 1,4-bis (1-mercaptoethyl) benzene, diphthalic acid di (1-mercaptoethyl ester), diphthalic acid di (2-mercaptopropyl ester) , Polyfunctional thiol compounds having a substituent at a carbon atom at the α-position and / or β-position with respect to a thiol group such as di (3-mercaptobutyl ester) phthalate, di (3-mercaptoisobutyl ester) phthalate; ethylene Glycol bis (3-mercaptobutyrate), propylene glycol bis (3-mercaptobutyrate), diethylene glycol bis (3-mercaptobutyrate), butanediol bis (3-mercaptobutyrate), octanediol bis (3-mercaptobutyrate) Rate), trimethylolpropane tris (3- Mercaptobutyrate), pentaerythritol tetrakis (3-mercaptobutyrate), dipentaerythritol hexakis (3-mercaptobutyrate), ethylene glycol bis (2-mercaptopropionate), propylene glycol bis (2-mercaptopropioate) Nate), diethylene glycol bis (2-mercaptopropionate), butanediol bis (2-mercaptopropionate), octanediol bis (2-mercaptopropionate), trimethylolpropane tris (2-mercaptopropionate) , Pentaerythritol tetrakis (2-mercaptopropionate), dipentaerythritol hexakis (2-mercaptopropionate), ethylene glycol bis (3-mercaptoisobutyrate) ), Propylene glycol bis (3-mercaptoisobutyrate), diethylene glycol bis (3-mercaptoisobutyrate), butanediol bis (3-mercaptoisobutyrate), octanediol bis (3-mercaptoisobutyrate), tri Methylolpropane tris (3-mercaptoisobutyrate), pentaerythritol tetrakis (3-mercaptoisobutyrate), dipentaerythritol hexakis (3-mercaptoisobutyrate), ethylene glycol bis (2-mercaptoisobutyrate), Propylene glycol bis (2-mercaptoisobutyrate), diethylene glycol bis (2-mercaptoisobutyrate), butanediol bis (2-mercaptoisobutyrate), octanediol bis ( -Mercaptoisobutyrate), trimethylolpropane tris (2-mercaptoisobutyrate), pentaerythritol tetrakis (2-mercaptoisobutyrate), dipentaerythritol hexakis (2-mercaptoisobutyrate), ethylene glycol bis ( 4-mercaptovalerate), propylene glycol bis (4-mercaptoisovalerate), diethylene glycol bis (4-mercaptovalerate), butanediol bis (4-mercaptovalerate), octanediol bis (4-mercaptovalerate) , Trimethylolpropane tris (4-mercaptovalerate), pentaerythritol tetrakis (4-mercaptovalerate), dipentaerythritol hexakis (4-mercaptovalerate), Tylene glycol bis (3-mercaptovalerate), propylene glycol bis (3-mercaptovalerate), diethylene glycol bis (3-mercaptovalerate), butanediol bis (3-mercaptovalerate), octanediol bis (3-mercapto) Valerate), trimethylolpropane tris (3-mercaptovalerate), pentaerythritol tetrakis (3-mercaptovalerate), dipentaerythritol hexakis (3-mercaptovalerate) and the like. Among these, pentaerythritol tetrakis (3-mercaptobutyrate) is preferable from the viewpoint of chain transfer of radicals generated by a photopolymerization initiator, particularly an imidazole photopolymerization initiator, and improving curability.

  The content of the sensitizer is preferably 0.01 to 10% by mass, more preferably 0.1 to 5% by mass, and still more preferably 0.2% with respect to the total solid content of the colored resin composition of the present invention. ˜3 mass%. If the content of the sensitizer is within the above range, a hydrophobic cross-linked structure including a thiol-derived structure is formed, and the surface is hydrophobized to prevent water or water-soluble compounds from adhering to the film surface. The generation of water spots can be suppressed.

(solvent)
The colored resin composition of the present invention contains a solvent for dispersing the pigment. The solvent is not particularly limited as long as it is used for a general colored resin composition for a color filter. Specifically, (mono or poly) alkylene glycol (mono or poly) such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, and dipropylene glycol dimethyl ether. ) Alkyl ethers and their acetates; diacetates such as propylene glycol diacetate and 1,3-butylene glycol diacetate; ethers such as tetrahydrofuran; ketones such as methyl ethyl ketone, cyclohexanone and 2-heptanone; Methyl hydroxypropionate, ethyl 3-hydroxypropionate, ethyl acetate, n-butyl Esters such as cetate, isobutyl acetate, isobutyl butyrate, n-butyl butyrate, ethyl 3-methoxypropionate, ethyl 3-ethoxypropionate, 3-methoxybutyl acetate, ethyl lactate, cyclohexanol acetate; aroma such as toluene and xylene Group hydrocarbons and the like. A solvent may be used individually by 1 type and may use 2 or more types together.

Among these, a solvent (hereinafter, also referred to as “solvent A”) having a boiling point of atmospheric pressure of 100 ° C. or more and less than 165 ° C., and a solvent (hereinafter, “solvent B”) having a boiling point of atmospheric pressure of 165 to 200 ° C. (Also referred to as). By using a solvent having the above boiling range in combination, the colored resin composition is less likely to cause coating unevenness, drying unevenness, dry deposits and bumping holes, and the chromaticity uniformity in the substrate surface is greatly increased. It becomes good.
Suitable examples of the solvent A include ethylene glycol monoethyl ether (boiling point: 136 ° C.), ethylene glycol monomethyl ether acetate (boiling point: 145 ° C.), and propylene glycol monomethyl ether acetate (boiling point: 146 ° C.).
Preferred examples of the solvent B include 3-methoxybutyl acetate (boiling point: 171 ° C.), 3-methyl-3-methoxybutyl acetate (boiling point: 188 ° C.), and ethyl 3-ethoxypropionate (boiling point: 170 ° C.). The
The content of the solvent is preferably 50 to 90% by mass and more preferably 70 to 90% by mass in the total amount of the colored resin composition. Usually, if it is this range, pigment dispersibility is favorable and the application | coating characteristic (in-plane uniformity) of a colored resin composition can be made favorable.

(Other ingredients)
The colored resin composition of the present invention may further include an inorganic filler; an adhesion promoter; an aggregation inhibitor; a polymerization terminator; a chain transfer agent; a leveling agent; a plasticizer; An ultraviolet absorber or the like may be contained.

  Examples of the method for preparing the colored resin composition of the present invention include the dyes, dispersants, alkali-soluble resins, photopolymerizable monomers, photopolymerization initiators, and surfactants described above, and various types used as necessary. Although the method which can melt | dissolve or disperse | distribute an additional component uniformly in a solvent is mentioned, it does not restrict | limit in particular, It can prepare by mixing using a well-known mixing means.

[Color filter]
FIG. 1 is a schematic sectional view showing an example of the color filter of the present invention. As illustrated in FIG. 1, the color filter 1 of the present invention includes a transparent substrate 2, a light shielding part 3, and a colored layer 4. The colored layer 4 is formed using the colored resin composition.

  The colored layer used in the color filter of the present invention is not particularly limited as long as it is formed using the above-described colored resin composition of the present invention. Usually, the opening of the light shielding portion on the transparent substrate described later is used. Depending on the kind of pigments such as pigments and dyes formed in the colored resin composition, it is composed of three or more colored patterns.

In addition, the arrangement of the colored layers is not particularly limited, and for example, a general arrangement such as a stripe type, a mosaic type, a triangle type, or a four-pixel arrangement type can be used. Moreover, the width | variety, area, etc. of a colored layer can be set arbitrarily.
The thickness of the colored layer is appropriately controlled by adjusting the coating method, solid content concentration, viscosity, and the like of the colored resin composition, but it is usually preferably in the range of 1 to 5 μm.

  As a pattern forming method, a method performed by a photolithography method using the colored resin composition of the present invention will be described. About the method, if it is a method which can form a hole in a colored layer, it will not specifically limit. For example, after applying the colored resin composition of the present invention to a substrate and drying it, exposure is performed by irradiating energy using a photomask provided with an opening and a shielding part, and then developing is performed. To form a pattern. By repeating this multiple times, for example, a red, green, and blue pattern is formed on the substrate, and then a transparent electrode film such as indium tin oxide (ITO) is formed to produce a color filter. can do.

There is no restriction | limiting in particular in the coating method of the said colored resin composition, For example, it can utilize for well-known coating methods, such as a spin coat method, spray coat, dip coat, roll coat, die coat, bar coat, and slit spin. Drying after coating is usually preferably performed at 50 to 150 ° C. for 15 seconds to 10 minutes.
The light source used for the exposure can be the same as the light source generally used for forming the colored layer, but in the ultraviolet region such as an ultrahigh pressure mercury lamp, a low pressure mercury lamp, a metal halide lamp, etc. Lamps with high emission lines are preferred.
In addition, as a method for developing the colored resin composition, the method is not particularly limited as long as the unnecessary portion of the colored resin composition can be removed. It can be the same as the developing method performed at the time. Here, it is preferable to develop with an alkaline developer, and it is possible to form holes in a finer pattern by optimizing the concentration of developer, development time, pressure of developer and washing water, etc. It becomes.

In addition, as a board | substrate used for this process, the thing similar to the board | substrate (transparent substrate) used for a general color filter can be used. Specific examples include inflexible transparent rigid materials such as quartz glass, alkali-free glass, and synthetic quartz plates, or transparent flexible materials having flexibility such as transparent resin films and optical resin plates. It is done.
Although the thickness of a board | substrate is not specifically limited, According to the use of the color filter of this invention, the thing of about 100 micrometers-1 mm can be used, for example.
In the production of the color filter, for example, other steps may be appropriately included as necessary, such as a light shielding portion forming step for forming a light shielding portion and a step for forming an overcoat layer on the colored layer.

  In the color filter of the present invention, when the surface roughness of the formed pixel is large, light incident on the pixel is scattered, for example, light is lost through the pixel, and the contrast is lowered. In addition, the adhesion between the transparent electrode film and the overcoat film may be lowered on the upper part of the pixel formed with the colored resin composition, and the alignment accuracy of the liquid crystal may be lowered. From the viewpoint of reducing the surface roughness of such pixels, the surface roughness (Ra) of the pattern is preferably 30 nm or less, more preferably 20 nm or less, and even more preferably 10 nm or less. Here, the surface roughness (Ra) refers to the arithmetic average roughness determined by the method described in the examples.

[Liquid Crystal Display]
The liquid crystal display device of the present invention has the color filter of the present invention described above, and the configuration thereof is not particularly limited, and may have the same configuration as a liquid crystal display device using a known color filter. it can. For example, a liquid crystal display device in which a transparent substrate and a counter substrate sandwich the color filter of the present invention and a liquid crystal layer can be used.
There is no particular limitation on the driving method of the liquid crystal display device, and a driving method generally used for a liquid crystal display device can be adopted. For example, a TN method, an IPS method, an OCB method, an MVA method, and the like can be given. As the liquid crystal constituting the liquid crystal layer, various liquid crystals having different dielectric anisotropies and mixtures thereof can be used depending on the driving method of the liquid crystal display device.

  EXAMPLES Next, although an Example demonstrates this invention still in detail, this invention is not limited at all by these examples. Here, each component other than the solvent is described in terms of solid content.

  In the following examples, the sensitivity, line width accuracy, pattern edge cross-sectional shape, developability, adhesion, solvent re-dissolvability, water stain and surface smoothness were evaluated as follows.

(sensitivity)
In the exposure process, the minimum exposure amount in which the film thickness after development and post-baking in the area irradiated with light in the exposure amount was 95% or more with respect to the film thickness 100% before exposure was evaluated as exposure sensitivity. did. A smaller exposure sensitivity value indicates higher sensitivity.
The film thickness was measured using a stylus type step thickness meter “P-15 Tencor” (produced by Instruments).

(Line width accuracy)
The line width of the colored layer after exposure and development was measured with respect to the mask opening line width (ultraviolet irradiation portion, line width 30 μm) and evaluated according to the following evaluation criteria. In addition, it shows that line width accuracy is so high that the variation | change_quantity of the line width of the colored layer with respect to mask opening line width is small, and evaluation A and B show a practical use level.
(Evaluation criteria)
A: The amount of change in the line width of the colored layer with respect to the line width of the mask opening is 10% or less. B: The amount of change in the line width of the color layer with respect to the line width of the mask opening is greater than 10% and 15% or less. The amount of change in the line width of the colored layer with respect to the line width is greater than 15% and 20% or less. D: The amount of change in the line width of the colored layer with respect to the line width of the mask opening is 20% or more.

(Pattern edge cross-sectional shape)
Using a scanning electron microscope (SEM: manufactured by Shimadzu Corporation, super scan model 220, magnification 10,000 times), the cross-sectional shape of the edge of the pattern 5 after exposure and development formed on the glass substrate 6 is viewed from the side. I took a picture. Observe the photographed image, visually evaluate the inclination angle θ of the edge of the pattern with respect to the horizontal plane of the glass substrate, and the cross-sectional shape is a forward taper type (near θ> 90 °), rectangular type (near θ = 90 °) Then, it was determined which shape was a reverse taper type (near θ <90 °). In addition, evaluation A and B show a practical use level.
(Evaluation criteria)
A: Forward taper type B: Rectangular type C: Reverse taper type

(Developability)
At the time of exposure, the presence or absence of a residue in an unexposed portion (a portion where light was not irradiated) was observed, and developability was evaluated according to the following evaluation criteria. In addition, evaluation A and B show a practical use level.
(Evaluation criteria)
A: No residue was observed at all in the unexposed area.
B: A slight residue was confirmed in the unexposed area, but there was no practical problem.
C: The residue was remarkably confirmed in the unexposed part.

(Adhesion)
Whether or not a pattern defect occurred was observed, and adhesion was evaluated according to the following evaluation criteria. In addition, evaluation A and B show a practical use level.
(Evaluation criteria)
A: No pattern defect (blemish) was observed.
B: Although pattern defects (blemish) were hardly observed, some defects were observed.
C: Remarkably many pattern defects (blemish) were observed.

(Solvent resolubility)
The tip of a glass substrate having a width of 0.5 cm and a length of 10 cm was immersed in the colored resin compositions prepared in Examples and Comparative Examples and applied to a 1 cm portion of the glass substrate. The pulled glass substrate is placed in a thermo-hygrostat so that the glass surface is horizontal, and dried at a temperature of 23 ° C. and a humidity of 55% RH for 30 minutes, and further at a temperature of 23 ° C. and a humidity of 80% RH for 30 minutes. It was. Next, the glass substrate on which the dried coating film was adhered was immersed in propylene glycol monomethyl ether acetate for 15 seconds. At this time, the redissolved state of the dried coating film was visually discriminated, and the solvent resolubility was evaluated according to the following evaluation criteria. In addition, evaluation AC shows a practical use level.
(Evaluation criteria)
A: The dried coating film was completely dissolved.
B: The dried coating film was dissolved and the solution was suspended.
C: A flake of a dry coating film was formed in the solvent, and the flake was eventually dissolved.
D: Dried flakes were formed in the solvent, and the solution was colored.
E: Thin pieces of the dried coating film were formed in the solvent, and the solution was not colored.
F: The dried coating film was insoluble in the solvent.

(Water stain)
Observation was made as to whether or not there was a water-stained pattern generated by the water used for rinsing after development, and the evaluation was made based on the following. In addition, evaluation A shows a practical use level.
(Evaluation criteria)
A: No water stain was observed B: Water stain was present on the entire surface.

(Surface smoothness)
The surface roughness Ra of the coating film was measured with an atomic force microscope (AFM; manufactured by Takano Co., Ltd., AS-7B), and the surface smoothness was evaluated according to the following evaluation criteria. The surface roughness Ra refers to the arithmetic average roughness obtained by the following formula.
(Evaluation criteria)
A: Ra is 10 nm or less B: Ra is greater than 10 nm and less than 30 nm C: Ra is 30 nm or more

  In the formula, N is the number of divisions with respect to the reference length at the time of measurement, and Rn is a deviation from the average height of the divided sections n when the thickness direction with respect to the surface is height.

Production Example 1 (Production of block copolymer)
In a 500 mL round bottom four-necked separable flask equipped with a condenser, addition funnel, nitrogen inlet, mechanical stirrer and digital thermometer, 250 parts by mass of tetrahydrofuran (THF) and initiator dimethylketenemethyltrimethylsilylacetal 5.81 Part by mass was added through an addition funnel, and nitrogen substitution was sufficiently performed. 0.5 parts by mass of a 1 mol / L acetonitrile solution of tetrabutylammonium m-chlorobenzoate as a catalyst was injected using a syringe, and 100 parts by mass of the first monomer methyl methacrylate was added over 60 minutes using an addition funnel. And dripped. The temperature was kept below 40 ° C. by cooling the reaction flask with an ice bath. After 1 hour, 33.3 parts by mass of dimethylaminoethyl methacrylate as the second monomer was added dropwise over 20 minutes. After reacting for 1 hour, 1 part by mass of methanol was added to stop the reaction. The obtained block copolymer THF solution was reprecipitated in hexane, purified by filtration and vacuum drying, and a block copolymer A was obtained. The block copolymer A thus obtained was confirmed by GPC (gel permeation chromatography) under the conditions of N-methylpyrrolidone, 0.01 mol / L lithium bromide added / polystyrene standard. The composition ratio MMA / DMAEMA mass ratio of methyl methacrylate (MMA) and dimethylaminoethyl methacrylate (DMAEMA) is 5/3, weight average molecular weight Mw: 8120, number average molecular weight Mn: 6840, molecular weight distribution Mw / Mn Was 1.19.

Production Example 2 (Preparation of salt-type block copolymer solution)
In a 100 mL round-bottom flask, 5.0 parts by mass of the block copolymer A obtained in Production Example 1 was dissolved in 23.76 parts by mass of propylene glycol monomethyl ether acetate (PGMEA), and phenylphosphonic acid as a salt forming component was dissolved. 0.94 parts by mass (manufactured by Tokyo Chemical Industry Co., Ltd.) (0.5 molar equivalent with respect to the DMAEMA unit of the block copolymer) was added, and the mixture was stirred at a reaction temperature of 40 ° C. for 2 hours to obtain a solid content of 20 % Salt-type block copolymer solution A was prepared.

Production Example 3 (Manufacture of acrylic resin)
The polymerization tank was charged with 300 parts by mass of propylene glycol monomethyl ether acetate (PGMEA), heated to 100 ° C. in a nitrogen atmosphere, then 100 parts by mass of phenoxyethyl methacrylate (PhEMA), 64 parts by mass of methyl methacrylate (MMA), methacrylic acid. 36 parts by weight of acid (MAA), 6 parts by weight of perbutyl O (manufactured by NOF Corporation) and 2 parts by weight of a chain transfer agent (N-dodecyl mercaptan) were continuously added dropwise over 1.5 hours. Thereafter, the reaction was continued while maintaining 100 ° C., and after 2 hours from the completion of dropping of the main chain forming mixture, 0.1 part by mass of p-methoxyphenol was added as a polymerization inhibitor to terminate the polymerization. Next, 20 parts by mass of glycidyl methacrylate (GMA) was added as an epoxy group-containing compound while blowing air, and the temperature was raised to 110 ° C., then 0.8 parts by mass of triethylamine was added and added at 110 ° C. for 15 hours. Reaction was carried out to obtain an acrylic resin (weight average molecular weight 8500, acid value 75 mgKOH / g). In addition, the said weight average molecular weight measured the weight average molecular weight by Showex GPC system-21H (Shodex GPC System-21H) by using polystyrene as a standard substance and THF as an eluent. The acid value was measured based on JIS K 0070.

Production Examples 4 to 8 (Production of photopolymerization initiators (d-1) to (d-5))
Photopolymerization initiators (d-1) to (d-5) represented by the general formulas (3) to (7) were obtained by the methods described in Examples 1 to 5 of Patent Document 2.

Production Example 9 (Production of Pigment Dispersion A)
As a dispersant, 6 parts by mass (1.2 parts by mass of solid content) of the salt-type block copolymer solution A prepared in Production Example 2, 5 parts by mass of a commercially available yellow pigment (PY150: average primary particle size 50 nm), alkali As a soluble resin, 3 parts by weight of a cardo resin (trade name: INR-16M manufactured by Nagase ChemteX Corporation), 18 parts by weight of PGMEA, and 60 parts by weight of 2.0 mm zirconia beads are placed in a mayonnaise bin, and a paint shaker ( Shake for 1 hour at Asada Tekko Co., Ltd., then take out 2.0 mm zirconia beads, add 60 parts by mass of 0.1 mm zirconia beads to 30 parts by mass of the remaining dispersion, Dispersion was performed for 3 hours in a paint shaker as crushing to prepare a pigment dispersion A.

Production Example 10 (Production of Pigment Dispersion Liquid B)
A pigment dispersion was prepared in the same manner as in Production Example 9 except that the commercially available yellow pigment used in Production Example 9 was replaced with a commercially available green pigment (PG58: average primary particle size 60 nm). B.

Production Example 11 (Production of Pigment Dispersion Liquid C)
A pigment dispersion was prepared in the same manner as in Production Example 9 except that the cardo resin used in Production Example 9 was replaced with the acrylic resin prepared in Production Example 3.

Production Example 12 (Production of Pigment Dispersion Liquid D)
A pigment dispersion was prepared in the same manner as in Production Example 11 except that the commercially available yellow pigment used in Production Example 11 was replaced with a commercially available green pigment (PG58: average primary particle size 60 nm). D.

Production Example 13 (Production of Pigment Dispersion Liquid E)
A pigment dispersion was prepared in the same manner as in Production Example 9 except that the commercially available yellow pigment used in Production Example 9 was replaced with a commercially available red pigment (PR177: average primary particle size 60 nm). E.

Production Example 14 (Production of Pigment Dispersion Liquid F)
A pigment dispersion was prepared in the same manner as in Production Example 9 except that the commercially available yellow pigment used in Production Example 9 was replaced with a commercially available red pigment (PR254: average primary particle size 60 nm). F.

Production Example 15 (Production of Pigment Dispersion Liquid G)
A pigment dispersion was prepared in the same manner as in Production Example 9 except that the commercially available yellow pigment used in Production Example 9 was replaced with a commercially available blue pigment (PB15: 6: average primary particle size 50 nm). Dispersion liquid G was obtained.

Production Example 16 (Production of Pigment Dispersion Liquid H)
A pigment dispersion was prepared in the same manner as in Production Example 9 except that the commercially available yellow pigment used in Production Example 9 was replaced with a commercially available purple pigment (PV23: average primary particle size 50 nm). H.

Examples 1-20, 23-26 and Comparative Examples 1-4
14.1 parts by mass and 43.5 parts by mass of Pigment Dispersion A obtained in Production Example 9 and Pigment Dispersion B obtained in Production Example 10 were mixed, respectively, and a cardo resin (trade name: INR as an alkali-soluble resin). -16M Nagase ChemteX Corporation) 4.3 parts by mass, polymerizable monomer, photopolymerization initiator, surfactant, sensitizer and solvent as shown in Tables 1 to 3 below. The mixture was mixed until uniform, and further filtered through a pressure filtration device having a mesh size of 1.5 μm to prepare a colored resin composition.
The obtained colored resin composition was spin-coated on a glass substrate and heated at 80 ° C. for 3 minutes to form a coating film of the colored resin composition. The obtained coating film is exposed with a high-pressure mercury lamp as a light source from the coating film side through a mask having a predetermined line width, and then spray development is performed using Disperse H (manufactured by Henkel) diluted 100 times. After the completion, post baking was performed at 230 ° C. for 30 minutes to form a pattern.

Example 21
14.1 parts by weight and 43.5 parts by weight of pigment dispersion C obtained in Production Example 11 and pigment dispersion D obtained in Production Example 12 were mixed, respectively, to prepare an acrylic resin prepared in Production Example 3 as an alkali-soluble resin. Each component of 4.3 parts by mass of a resin, a polymerizable monomer, a photopolymerization initiator, a surfactant, a sensitizer, and a solvent are blended as shown in Table 2 below, mixed until uniform, and further meshed A colored resin composition was prepared by filtering with a pressure filtration device having a size of 1.5 μm. About the obtained colored resin composition, the pattern was formed by the method similar to Example 1. FIG.

Example 22
14.1 parts by weight and 43.5 parts by weight of the pigment dispersion C obtained in Production Example 11 and the pigment dispersion D obtained in Production Example 12 were mixed, respectively, and a cardo resin (trade name: INR as an alkali-soluble resin). -16M Nagase ChemteX Co., Ltd.) 4.3 parts by weight, polymerizable monomer, photopolymerization initiator, surfactant, sensitizer, and solvent as shown in Table 2 below, A colored resin composition was prepared by mixing until uniform and further filtering with a pressure filtration device having a mesh size of 1.5 μm. About the obtained colored resin composition, the pattern was formed by the method similar to Example 1. FIG.

Example 27
28.2 parts by mass and 25.6 parts by mass of the pigment dispersion E obtained in Production Example 13 and the pigment dispersion F obtained in Production Example 14 were mixed, respectively, to obtain a cardo resin (trade name: INR as an alkali-soluble resin). -16M Nagase ChemteX Co., Ltd.) 4.66 parts by mass, polymerizable monomer, photopolymerization initiator, surfactant, sensitizer, and solvent as shown in Table 3 below. A colored resin composition was prepared by mixing until uniform and further filtering with a pressure filtration device having a mesh size of 1.5 μm. About the obtained colored resin composition, the pattern was formed by the method similar to Example 1. FIG.

Example 28
The pigment dispersion G obtained in Production Example 15 and the pigment dispersion H obtained in Production Example 16 were mixed to 38.4 parts by mass and 6.4 parts by mass, respectively, to obtain a cardo resin (trade name: INR as an alkali-soluble resin). -16M Nagase ChemteX Co., Ltd.) 3.89 parts by mass, polymerizable monomer, photopolymerization initiator, surfactant, sensitizer, and solvent as shown in Table 3 below. A colored resin composition was prepared by mixing until uniform and further filtering with a pressure filtration device having a mesh size of 1.5 μm. About the obtained colored resin composition, the pattern was formed by the method similar to Example 1. FIG.

Details of the components shown in Tables 1 to 3 are as follows.
* Dispersant: Production Example 2 (amine value 119 mgKOH / g)
* Alkali-soluble resin (c-1); acrylic resin synthesized in Production Example 3 (weight average molecular weight 8500, acid value 75 mgKOH / g)
* Alkali-soluble resin (c-2); Cardo resin (trade name: INR-16M, manufactured by Nagase ChemteX Corp., solid content: 43.3% by mass)
* Photopolymerizable monomer: reaction product of dipentaerythritol and acrylic acid mainly composed of dipentaerythritol penta / hexaacrylate (trade name T Aronix M-403, manufactured by Toagosei Co., Ltd.)
* Photopolymerization initiator (d-1); Compound represented by the general formula (3) * Photopolymerization initiator (d-2); Compound represented by the general formula (4) * Photopolymerization initiator (d- 3); compound represented by the general formula (5) * photopolymerization initiator (d-4); compound represented by the general formula (6) * photopolymerization initiator (d-5); ) Compound represented by the formula: * photopolymerization initiator (d-6); acetophenone (trade name Irgacure 907, manufactured by BASF Japan Ltd., 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropane-1 -ON)
* Photopolymerization initiator (d-7); benzophenone series (trade name EAB-SS, manufactured by Daido Kasei Co., Ltd., 4,4′-bisdimethylaminobenzophenone)
* Photopolymerization initiator (d-8); thioxanthone series (trade name Kayacure DETX-S, Nippon Kayaku Co., Ltd., 2,4-diethylthioxanthone)
* Photopolymerization initiator (d-9); imidazole type (trade name biimidazole, manufactured by Kurokin Kasei Co., Ltd., 2-2′-bis (2-chlorophenyl) -4,4 ′, 5,5′-tetra Phenyl-1,2'-biimidazole)
* Photopolymerization initiator (d-10); Oxime ester (trade name Irgacure OXE02, manufactured by BASF Japan Ltd., Etanone, 1- [9-ethyl-6- (2-methylbenzoyl) -9H-carbazole-3 -Yl]-, 1- (O-acetyloxime))
* Photopolymerization initiator (d-11); Oxime ester (trade name: N1919, manufactured by ADEKA)
* Fluorine-based surfactant (e-1); trade name MegaFac R-08MH, manufactured by DIC Corporation * Silicone-based surfactant (e-2); trade name BYK-301, manufactured by Big Chemie Japan Co., Ltd. * Sensitizer (g-1): 2-mercaptobenzothiazole * Sensitizer (g-2): Pentaerythritol tetrakis (3-mercaptobutyrate)
* Solvent (f-1): Propylene glycol monomethyl ether acetate (PGMEA)
* Solvent (f-2): 3-methoxybutyl acetate * Solvent (f-3): 3-methyl-3-methoxybutyl acetate * Solvent (f-4): Ethyl 3-ethoxypropionate

  From Tables 1 to 3, the colored resin compositions of Examples 1 to 28 are more sensitive than the colored resin compositions of Comparative Examples 1 to 4, even when the pigment is at a high concentration, adhesion to the substrate, It can be seen that fine pixels having excellent developability and surface smoothness and having no water stain can be formed. In Examples 6 to 28, at least one photopolymerization initiator selected from the photopolymerization initiator represented by the general formula (1) and an acetophenone-based, benzophenone-based, thioxanthone-based, and imidazole-based photopolymerization initiator is used. It can be seen that the pattern end cross-sectional shape can be controlled to a forward taper type or a rectangular type by using in combination with an agent.

  The colored resin composition for a color filter of the present invention can form a fine pixel having excellent sensitivity and resolution and excellent film surface smoothness even when the dye is at a high concentration. A liquid crystal display device having the color filter can be provided.

DESCRIPTION OF SYMBOLS 1; Color filter 2; Board | substrate 3; Light-shielding part 4; Colored layer 5; Pattern 6;

Claims (15)

A dye, a dispersant, an alkali-soluble resin, a photopolymerizable monomer, a photopolymerization initiator, a surfactant, and a solvent, wherein the photopolymerization initiator contains a compound represented by the following general formula (1), The surfactant is a silicone-based and / or fluorine-based surfactant, the surfactant is contained in an amount of 0.001 to 5% by mass based on the total solid content of the colored resin composition, and the photopolymerization initiator Is a colored resin composition further containing at least one selected from acetophenone-based, benzophenone-based, thioxanthone-based, and imidazole-based photopolymerization initiators .

[Wherein R ^{1 to} R ¹¹ are each independently a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, substituted Or an unsubstituted cycloalkyl group having 3 to 10 ring atoms, a substituted or unsubstituted cycloalkenyl group having 4 to 20 carbon atoms, a hydroxyl group, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, substituted or Unsubstituted alkenyloxy group having 2 to 20 carbon atoms, substituted or unsubstituted alkanoyl group having 1 to 20 carbon atoms, substituted or unsubstituted alkenoyl group having 2 to 20 carbon atoms, substituted or unsubstituted ring forming carbon number An aryl group having 6 to 14 or a substituted or unsubstituted heterocyclic group having 3 to 14 ring atoms is shown. R ³ may be combined with R ⁴ or R ⁵ to form a ring. R ⁴ may combine with R ⁵ to form a ring.
Ar represents a substituted or unsubstituted aryl group having 6 to 14 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 14 ring atoms.
W represents a single bond or an oxygen atom. Z represents a single bond, an oxygen atom, or> NR ³ ′ (R ³ ′ represents a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or R ³ ′ is connected to R ³ together with a nitrogen atom. Forming a ring).
n represents an integer of 1 to 10. When n is an integer of 2 to 10, the plurality of R ⁴ and R ⁵ may be the same or different. ] The colored resin composition according to claim 1, wherein the compound represented by the general formula (1) is at least one compound represented by the following general formulas (3) to (7).
The colored resin composition of Claim 1 or 2 which contains 2-40 mass% of said photoinitiators with respect to the solid content whole quantity of the said colored resin composition. The colored resin composition according to any one of claims 1 to 3 , comprising a thiol compound as a sensitizer. The dye is C.I. I. Pigment red 177 and C.I. I. It is at least one selected from Pigment Red 254, colored resin composition according to any one of claims 1-4. The dye is C.I. I. Pigment green 7, C.I. I. Pigment green 36, C.I. I. Pigment green 58, C.I. I. Pigment yellow 138, C.I. I. Pigment yellow 139 and C.I. I. The colored resin composition according to any one of claims 1 to 4 , which is at least one selected from CI Pigment Yellow 150. The dye is C.I. I. Pigment blue 15, C.I. I. Pigment blue 15: 3, C.I. I. Pigment blue 15: 4, C.I. I. Pigment blue 15: 6 and C.I. I. It is at least one selected from Pigment Violet 23, the colored resin composition according to any one of claims 1-4. Mass of the dye and (P), the ratio of the solids mass excluding the pigment (V) (P / V ratio) is 0.15 to 1.0, according to any of claims 1 to 7 Colored resin composition. The colored resin composition according to any one of claims 1 to 8 , wherein an amine value of the dispersant is 200 mgKOH / g or less. The alkali-soluble resin is an alkali-soluble resin having an acidic functional group, the acid value of the acid functional groups are 10~150mgKOH / g, the colored resin composition according to any one of claims 1-9. The colored resin composition according to any one of claims 1 to 9 , wherein the alkali-soluble resin is a cardo resin. The colored resin according to any one of claims 1 to 11 , comprising a solvent having a boiling point of atmospheric pressure of 100 ° C or higher and lower than 165 ° C, and a solvent having a boiling point of atmospheric pressure of 165 to 200 ° C as the solvent. Composition. The solvent having a boiling point of 100 ° C. or more and less than 165 ° C. is at least one selected from ethylene glycol monoethyl ether, ethylene glycol monomethyl ether acetate and propylene glycol monomethyl ether acetate, and has a boiling point of 165 to 165 ° C. The colored resin composition according to claim 12 , wherein the solvent at 200 ° C is at least one selected from 3-methoxybutyl acetate, 3-methyl-3-methoxybutyl acetate, and ethyl 3-ethoxypropionate. A color filter formed by using a colored resin composition according to any one of claims 1 to 13. A liquid crystal display device comprising the color filter according to claim 14 .