JP2017032789A - White coloring composition for color filter, method for manufacturing color filter, method for manufacturing display device, color filter, and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a white coloring composition for color filter capable of forming a color filter which has high luminance, facilitates adjustment of white balance, and has less display unevenness of a display device when used for a display device.SOLUTION: There is provided a white coloring composition for color filter which contains a pigment, a dispersant, an alkali-soluble resin, a photoinitiator, a polyfunctional monomer and a solvent, where a P/V ratio that is a mass ratio between the pigment and the total solid content other than the pigment is 0.001 or more and 0.1 or less, and the dispersant is a block copolymer or a graft copolymer having an A segment containing a structural unit represented by general formula (I) and has an amine value of 40 mgKOH/g or more and 130 mgKOH/g or less.SELECTED DRAWING: None

Description

  The present invention relates to a white coloring composition for a color filter that can form a color filter with high brightness, easy white balance adjustment, and less display unevenness when used in a display device.

As a color filter used for a liquid crystal display device, an organic electroluminescence display device, or the like, one having a colored layer of three colors of red, green, and blue is known. In response to the demand for higher brightness and lower power consumption, a color filter having a colored layer of three colors of red, green, and blue and a white colored layer as a fourth colored layer is known.
Patent Document 1 and Patent Document 2 describe a color filter using a transparent resin layer as a white colored layer. By using a transparent resin layer as the white colored layer, the transmittance of light from a light source such as a backlight can be improved, and high luminance can be achieved. However, since the chromaticity of the white colored layer formed of the transparent resin layer is almost constant, it is necessary to match the synthetic white chromaticity of the colored colored layer with the white colored layer in order to achieve the desired white balance of the color filter. There is. Therefore, there is a problem that the chromaticity and luminance of the colored layer are limited.
Patent Document 3 discloses a white colored layer for the purpose of matching the additive color mixture chromaticity of red, green, and blue pixels with the chromaticity of white pixels without decreasing the transmittance of the color filter substrate, thereby improving the white balance. Describes a color filter using a low pigment layer containing a pigment at a low concentration.

JP 2011-128590 A JP 2014-21430 A JP 2012-150457 A

  However, when a display device is formed using a color filter including a white colored layer described in Patent Document 3, there is a problem that display unevenness occurs in the display device.

  The present invention has been made in view of the above problems, and is a color that can form a color filter with high brightness, easy white balance adjustment, and less display unevenness when used in a display device. The main object is to provide a white coloring composition for a filter.

  As a result of repeated research to solve the above-mentioned problems, pixel aggregation occurs in the color filter due to the low concentration of pigment and the aggregation of the pigment in the white colored layer is conspicuous. The present inventors have found that unevenness has occurred and have completed the present invention.

  That is, the present invention includes a pigment, a dispersant, an alkali-soluble resin, a photoinitiator, a polyfunctional monomer, and a solvent, and a P / V ratio that is a mass ratio of the pigment to the total solid content other than the pigment is 0. The dispersant is a block copolymer or graft copolymer having an A segment containing a structural unit represented by the following general formula (I), and an amine value of 40 mgKOH / g. There is provided a white coloring composition for a color filter, which is 130 mgKOH / g or less.

(In General Formula (I), R ¹ represents a hydrogen atom or a methyl group, A represents —COO—B— or —CONH—B—, B represents a divalent linking group, and R ² and R ³ represent And each independently represents a hydrogen atom or a hydrocarbon group that may contain a hetero atom, and R ² and R ³ may be bonded to each other to form a ring structure.)

According to the present invention, a white colored layer having a high luminance and a high luminance can be formed because of the P / V ratio. In addition, it is possible to adjust the chromaticity of the white colored layer by the pigment contained at a low concentration, and the chromaticity can be adjusted to the white of a wide color gamut synthesized by the colored colored layer having a wide color gamut and brightness. The white balance of the color filter can be easily adjusted.
Further, when the dispersant is a block copolymer or graft copolymer having the predetermined amine value and structure, the pigment can be dispersed with good dispersibility. For this reason, the white colored layer formed using the white colored composition for color filters of the present invention (hereinafter sometimes simply referred to as a white colored composition) has few pigment aggregates. As a result, the white colored composition can form a color filter with little pixel unevenness.
For this reason, the white coloring composition of the present invention has high brightness, can easily adjust the white balance, and can form a color filter with little display unevenness when used in a display device. It becomes.

  In the present invention, at least part of the terminal nitrogen moiety of the structural unit represented by the general formula (I) of the block copolymer or graft copolymer is represented by the following general formulas (1) to (3). It is preferable to form a salt with one or more compounds selected from the group consisting of the represented compounds. This is because when the dispersant has a salt-forming site, the dispersant further improves the pigment adsorptivity at the salt-forming site and improves the pigment dispersibility.

(In General Formula (1), R ^a is a linear, branched or cyclic alkyl group having 1 to 20 carbon atoms, a vinyl group, an optionally substituted phenyl group or benzyl group, or —O—. R ^e is represented, and R ^e is a linear, branched or cyclic alkyl group having 1 to 20 carbon atoms, a vinyl group, an optionally substituted phenyl group or benzyl group, or a carbon number having 1 to 4 carbon atoms. Represents a (meth) acryloyl group via an alkylene group. In the general formula (2), R ^b , R ^{b ′} and R ^{b ″} each independently have a hydrogen atom, an acidic group or an ester group thereof, and a substituent. A linear, branched or cyclic alkyl group having 1 to 20 carbon atoms, a vinyl group which may have a substituent, a phenyl group or a benzyl group which may have a substituent, or -O- It represents R ^{f, R f} is a also a good number of 1 to 20 carbon having substituent Via a chain, branched or cyclic alkyl group, a vinyl group which may have a substituent, a phenyl group or a benzyl group which may have a substituent, or an alkylene group having 1 to 4 carbon atoms (meth) Represents an acryloyl group, and X represents a chlorine atom, a bromine atom, or an iodine atom, In the general formula (3), R ^c and R ^d are each independently a hydrogen atom, a hydroxyl group, or a straight chain having 1 to 20 carbon atoms. Represents a branched or cyclic alkyl group, a vinyl group, an optionally substituted phenyl group or benzyl group, or —O—R ^e , where R ^e is a linear or branched chain having 1 to 20 carbon atoms. Or a cyclic alkyl group, a vinyl group, a phenyl group or benzyl group which may have a substituent, or a (meth) acryloyl group via an alkylene group having 1 to 4 carbon atoms, provided that R ^c and R ^d At least one of contains a carbon atom. )

  In this invention, it is preferable that content in the total solid of the said photoinitiator exists in the range of 0.1 mass%-9.0 mass%. It is because the white coloring composition of this invention can form a high-definition white colored layer because it is the said content.

  In the present invention, the pigment preferably contains at least one of a green pigment, a blue pigment, and a violet pigment. This is because by using the pigment, the white colored composition of the present invention is more suitable for forming a white colored layer of a color filter used in a display device.

  In the present invention, the chromaticity coordinates in the XYZ color system of JIS Z8701 measured by using a C light source are 0.25 ≦ x ≦ 0.38 and 0.25 ≦ y. It is a pigment composition capable of forming a cured film satisfying ≦ 0.39, and is preferably for a liquid crystal display device. This is because the white colored composition is more suitable for forming a white colored layer of a color filter used in a liquid crystal display device.

  In the present invention, it is preferable that x and y of the chromaticity coordinates have a relationship of x ≦ y. This is because the white colored composition is more suitable for forming a white colored layer of a color filter used in a liquid crystal display device.

  In the present invention, the chromaticity coordinates in the XYZ color system of JIS Z8701 measured by using a C light source are 0.27 ≦ x ≦ 0.36, and 0.25 ≦ y. It is a pigment composition capable of forming a cured film satisfying ≦ 0.32, and is preferably used for an organic electroluminescence display device. This is because the white colored composition is more suitable for forming a white colored layer of a color filter used in an organic EL display device.

  This invention provides the manufacturing method of the color filter characterized by having the white colored layer formation process which forms a white colored layer using the above-mentioned white colored composition for color filters.

  According to the present invention, it is possible to obtain a color filter with high luminance and little pixel unevenness by including a white colored layer forming step of forming a white colored layer using the above-described white colored composition for a color filter.

  The present invention provides a method for manufacturing a display device comprising a color filter forming step of forming a color filter having a white colored layer using the above-described white colored composition.

  According to the present invention, by having a color filter forming step of forming a color filter having a white colored layer formed using the above-described white colored composition, a display device with high brightness and little display unevenness is obtained. Can do.

  The present invention provides a color filter having a white colored layer formed using a cured product of the above-described white colored composition for a color filter.

  According to the present invention, by having a white colored layer formed using a cured product of the above-described white composition, the color filter has high luminance and display unevenness of the display device when used in the display device. It will be less.

  The present invention provides a display device having the color filter described above.

  According to the present invention, by having the color filter described above, the display device has high brightness and little display unevenness.

  The present invention provides a white coloring composition for a color filter that is capable of forming a color filter with high brightness, easy white balance adjustment, and less display unevenness when used in a display device. There is an effect that can be done.

It is process drawing which shows an example of the manufacturing method of the color filter of this invention. It is process drawing which shows an example of the manufacturing method of the display apparatus of this invention. It is process drawing which shows the other example of the manufacturing method of the display apparatus of this invention.

The present invention relates to a white coloring composition for a color filter, a method for producing a color filter, a method for producing a display device, a color filter, and a display device.
Hereinafter, the white coloring composition for a color filter, the method for producing a color filter, the method for producing a display device, the color filter and the display device of the present invention will be described.

A. First, the white coloring composition for color filters of the present invention will be described.
The white coloring composition for a color filter of the present invention includes a pigment, a dispersant, an alkali-soluble resin, a photoinitiator, a polyfunctional monomer, and a solvent, and is a mass ratio of the pigment to the total solid content other than the pigment. / V ratio is 0.001 or more and 0.1 or less, and the dispersant is a block copolymer or graft copolymer having an A segment containing a structural unit represented by the following general formula (I): The amine value is 40 mgKOH / g or more and 130 mgKOH / g or less.

(In General Formula (I), R ¹ represents a hydrogen atom or a methyl group, A represents —COO—B— or —CONH—B—, B represents a divalent linking group, and R ² and R ³ represent And each independently represents a hydrogen atom or a hydrocarbon group that may contain a hetero atom, and R ² and R ³ may be bonded to each other to form a ring structure.)

According to the present invention, a white colored layer having a high luminance and a high luminance can be formed because of the P / V ratio. In addition, it is possible to adjust the chromaticity of the white colored layer by the pigment contained at a low concentration, and the chromaticity can be adjusted to the white of a wide color gamut synthesized by the colored colored layer having a wide color gamut and brightness. The white balance of the color filter can be easily adjusted.
Moreover, the said pigment can be disperse | distributed with sufficient dispersibility because the said dispersing agent is the block copolymer or the graft copolymer which has the said predetermined | prescribed amine number and a structural unit. For this reason, the white colored layer formed using the white coloring composition of this invention has few pigment aggregates. As a result, the white colored composition can form a color filter with little pixel unevenness.
For this reason, the white coloring composition of the present invention has high brightness, can easily adjust the white balance, and can form a color filter with little display unevenness when used in a display device. It becomes.

In the field of color filters, the higher the pigment concentration in the colored layer, the higher the dispersion performance required for the dispersant in the colored composition. If the pigment concentration is low, the dispersant does not require high dispersion performance. For this reason, when manufacturing a white coloring composition with a low pigment concentration, it was not foreseen at all that the use of the dispersant used in the colored layer would cause a problem due to the dispersibility of the pigment.
However, even in the case where no pixel unevenness is observed in the colored layer, the pixels in the white colored layer having the same components and contents as those of the colored layer except that the content of the pigment and the dispersant is reduced at the same ratio. Unevenness was observed.
As a result of repeated researches to solve such pixel unevenness, the present inventors, as a result, the white colored layer formed using the white colored composition has a lower pigment concentration than the colored colored layer, It has been found that there is less overlap in the thickness direction between the pigment and its aggregates compared to the colored layer, and the white colored layer makes the aggregates of the individual pigments more conspicuous.
In addition, the present inventors have found that the agglomerates are conspicuous in the white colored layer, so that even when the content of the pigment agglomerates contained in the white colored layer is small, the white colored layer is removed from the backlight. When the light is transmitted, the presence of aggregates is emphasized and pixel unevenness, which is unevenness of transmitted light, is generated. When a display device is manufactured using a white colored layer that causes such pixel unevenness, The present inventors have found that it is recognized as display unevenness in the apparatus and have completed the present invention.
That is, according to the present invention, by using a dispersant having a higher dispersion performance than a dispersant that does not cause pixel unevenness in a general colored layer, it is possible to generate aggregates that are conspicuous due to a low pigment concentration. Therefore, pixel unevenness that causes display unevenness when used in a display device can be eliminated.
As described above, the present invention distributes the problem of pixel unevenness caused by the fact that pigment aggregates are easily noticeable, which is a problem peculiar to the white colored layer having a low pigment concentration compared to the colored colored layer. This can be solved by using the specific dispersant having high performance.

The reason why the pigment can be dispersed with good dispersibility by using the copolymer having the predetermined amine value and the structural unit is not clear, but is presumed as follows.
That is, the structural unit represented by the general formula (I) has a terminal nitrogen moiety (—NR ² R ³ ) corresponding to an amino group, and further has an amide group or a carbonyl group. have. In addition, the block copolymer or graft copolymer containing the structural unit represented by the general formula (I) has an amine value larger than a specific value, so that the high basic portion is adsorbed to the pigment. Since it exists as a sufficient segment, the adsorptivity to the pigment and the maintenance ability after the adsorption are particularly enhanced, and the pigment dispersibility and the pigment dispersion stability are excellent.

The white coloring composition for a color filter of the present invention contains a pigment, a dispersant, an alkali-soluble resin, a photoinitiator, a polyfunctional monomer, and a solvent.
Hereinafter, each component of the white coloring composition for color filters of this invention is demonstrated in detail.

1. Dispersant The dispersant used in the present invention is a block copolymer or graft copolymer having an A segment containing the structural unit represented by the general formula (I).
The dispersant has an amine value of 40 mgKOH / g or more and 130 mgKOH / g or less.

(1) Amine Value The amine value of the dispersant is 40 mgKOH / g or more and 130 mgKOH / g or less, preferably 45 mgKOH / g or more and 120 mgKOH / g or less, particularly 50 mgKOH / g or more and 110 mgKOH / g or less. It is preferable that it is 55 mgKOH / g or more and 100 mgKOH / g or less. This is because, when the amine value is within the above range, the dispersant is more excellent in dispersibility of the pigment.
The amine value of the dispersant in the present invention is potassium hydroxide equivalent to the amount of hydrochloric acid required to neutralize 1 g of the solid content of the block copolymer or graft copolymer contained as the dispersant. This is a value measured by the method described in JIS K 7237.
In the case where the block copolymer or graft copolymer forms a salt forming site to be described later in at least a part of the terminal nitrogen site of the structural unit represented by the general formula (I). The amine value of the dispersant refers to the amine value of the block copolymer or graft copolymer (hereinafter sometimes simply referred to as copolymer) before salt formation.
When the copolymer forms a salt-forming site, that is, when the copolymer is a salt-type copolymer, the amine value of the salt-type copolymer is the copolymer weight before salt formation. The value is reduced by the amount of salt formed compared to coalescence. However, since the salt forming site is the same as the terminal nitrogen site corresponding to the amino group, or rather, an enhanced pigment adsorption site, the salt dispersibility and pigment dispersion stability tend to be improved by salt formation. Further, like the amino group, if the salt forming site is too much, the dispersibility and the solvent resolubility are adversely affected. Therefore, in the present invention, the amine value of the copolymer before salt formation can be used as an index for improving pigment dispersion stability and solvent resolubility.

(2) Copolymer The dispersant in the present invention is a block copolymer and a graft copolymer having the A segment.
In the present invention, the dispersant is preferably a block copolymer. This is because when the dispersant is a block copolymer, the dispersant is more excellent in the dispersibility of the pigment.
Hereinafter, the copolymer used as the dispersant will be described separately for a block copolymer and a graft copolymer.

(A) Block copolymer The block copolymer in the present invention is not particularly limited as long as it has the A segment. For example, the block copolymer is bonded to the A segment and the end of the A segment. And a B segment that functions as a solvophilic site.

(I) A segment The said A segment contains the structural unit represented by the said general formula (I).
The structural unit represented by the above general formula (I) contained in the A segment has basicity and functions as an adsorption site for the pigment.

  In the general formula (I), A represents -COO-B- or -CONH-B-.

In the above general formula (I), B is a divalent linking group.
Examples of the divalent linking group in B include, for example, an alkylene group having 1 to 10 carbon atoms, an arylene group, and an ether group having 1 to 10 carbon atoms (-R'-OR "-: R 'and R" Each independently an alkylene group) and combinations thereof.
Among these, from the viewpoint of dispersibility, B in the general formula (I) is preferably an alkylene group having 1 to 10 carbon atoms, and particularly preferably an alkylene group having 1 to 5 carbon atoms.

Examples of the hydrocarbon group in the hydrocarbon group that may include a hetero atom in R ² and R ³ include an alkyl group, an aralkyl group, and an aryl group.
Examples of the alkyl group include a methyl group, an ethyl group, a propyl group, a butyl group, an isopropyl group, a tert-butyl group, a 2-ethylhexyl group, a cyclopentyl group, a cyclohexyl group, and the like. 1-18 are preferable and, among them, a methyl group or an ethyl group is more preferable.
Examples of the aralkyl group include a benzyl group, a phenethyl group, a naphthylmethyl group, and a biphenylmethyl group. 7-20 are preferable and, as for the carbon atom number of an aralkyl group, 7-14 are more preferable.
Examples of the aryl group include a phenyl group, a biphenyl group, a naphthyl group, a tolyl group, and a xylyl group. 6-24 are preferable and, as for the carbon atom number of an aryl group, 6-12 are more preferable. The preferred number of carbon atoms does not include the number of carbon atoms of the substituent.
The hydrocarbon group containing a hetero atom has a structure in which a carbon atom in the hydrocarbon group is replaced with a hetero atom. Examples of the hetero atom that the hydrocarbon group may contain include an oxygen atom, a nitrogen atom, a sulfur atom, and a silicon atom.
Moreover, the hydrogen atom in a hydrocarbon group may be substituted by halogen atoms, such as a C1-C5 alkyl group, a fluorine atom, a chlorine atom, and a bromine atom.

The phrase “R ² and R ³ are bonded to each other to form a ring structure” means that R ² and R ³ form a ring structure through a nitrogen atom. The ring structure formed by R ² and R ³ may contain a hetero atom. The ring structure is not particularly limited, and examples thereof include a pyrrolidine ring, a piperidine ring, and a morpholine ring.

In the present invention, among them, R ² and R ³ are each independently a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a phenyl group, or R ² and R ³ are bonded to form a pyrrolidine ring. , A piperidine ring and a morpholine ring are preferably formed.

Examples of the monomer for deriving the structural unit represented by the general formula (I) include dimethylaminoethyl (meth) acrylate, dimethylaminopropyl (meth) acrylate, diethylaminoethyl (meth) acrylate, and diethylaminopropyl (meth) acrylate. Examples include alkyl group-substituted amino group-containing (meth) acrylamides such as alkyl group-substituted amino group-containing (meth) acrylates, dimethylaminoethyl (meth) acrylamide, and dimethylaminopropyl (meth) acrylamide. Among them, as a monomer for deriving the structural unit represented by the general formula (I) in terms of improving dispersibility and dispersion stability, dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, dimethylamino Propyl (meth) acrylamide can be preferably used.
The structural unit represented by the general formula (I) may be composed of one type or may include two or more types of structural units.

  In the A segment including the structural unit represented by the general formula (I), it is preferable that three or more structural units represented by the general formula (I) are included. Among these, from the viewpoint of improving dispersibility and dispersion stability, the A segment preferably contains 3 to 100 structural units, more preferably 3 to 50, more preferably 3 to 30. More preferably, the number is included.

The A segment may have a structural unit other than the structural unit represented by the general formula (I) as long as the object of the present invention is achieved, and may share the structural unit represented by the general formula (I). Any polymerizable structural unit can be contained. For example, as the structural unit other than the structural unit represented by the above general formula (I), the structural unit mentioned in the B segment described later can be used. Specifically, for example, the general formula (II) described later can be used. The structural unit etc. which are represented by these are mentioned.
In the A segment in the block copolymer, the content of the structural unit represented by the general formula (I) is within the range of 50% by mass to 100% by mass with respect to the total mass of all the structural units of the A segment. It is preferable to be within a range of 80% by mass to 100% by mass, and most preferably 100% by mass. This is because the higher the proportion of the structural unit represented by the general formula (I), the better the adsorption power to the pigment, and the better the dispersibility and dispersion stability of the block copolymer. In addition, the content rate of the said structural unit is computed from the preparation mass at the time of synthesize | combining A segment which has a structural unit represented by general formula (I).

In the block copolymer, the content ratio of the structural unit represented by the general formula (I) is particularly limited as long as the amine value of the block copolymer can be within the predetermined range. However, it is within the range of 5% by mass to 60% by mass with respect to the total mass of all the structural units of the block copolymer from the viewpoint of good dispersibility and dispersion stability. Preferably, it is in the range of 10% by mass to 50% by mass. In addition, the content rate of each structural unit in the said block copolymer is computed from the preparation mass at the time of synthesize | combining the said block copolymer.
In addition, the structural unit represented by general formula (I) should just have affinity with a pigment, may consist of 1 type, and may contain 2 or more types of structural units. .

(Ii) B segment The B segment binds to the end of the A segment and functions as a solvophilic site.
As the B segment, among monomers having an unsaturated double bond that can be copolymerized with the monomer that derives the structural unit represented by the general formula (I), depending on the solvent so as to have solvophilicity It is preferable to select and use as appropriate. As a guide, it is preferable to introduce the B segment so that the solubility of the copolymer at 23 ° C. is 20 (g / 100 g solvent) or more with respect to the solvent used in combination.

The B segment includes a structural unit that improves the solvophilicity appropriately selected according to the solvent used from the viewpoint of improving the solvophilicity.
Examples of the structural unit constituting the B segment include monomers having an unsaturated double bond copolymerizable with the monomer that derives the structural unit represented by the general formula (I). The structural unit represented by (II) is preferred.

(In General Formula (II), A ′ is a direct bond or a divalent linking group, R ⁴ is a hydrogen atom or a methyl group, R ⁵ is a hydrocarbon group, — [CH (R ⁶ ) —CH (R ⁷ ) —O] _x —R ⁸ or — [(CH ₂ ) _y —O] _z —R ⁸ is a monovalent group, and R ⁶ and R ⁷ are each independently a hydrogen atom or a methyl group. R ⁸ is a hydrogen atom, a hydrocarbon group, a monovalent group represented by —CHO, —CH ₂ CHO, or —CH ₂ COOR ⁹ , and R ⁹ is a hydrogen atom or a carbon atom having 1 to 5 carbon atoms. It is an alkyl group.
The hydrocarbon group may have a substituent.
x is an integer of 1 to 18, y is an integer of 1 to 5, and z is an integer of 1 to 18. )

In the general formula (II), A ′ is a direct bond or a divalent linking group. The direct bond means that A ′ has no atom, that is, C (carbon atom) in the general formula (II) and R ⁵ are bonded without interposing another atom.
The divalent linking group in A ′ can be the same as A described in the section “(i) A segment”, for example.

In the general formula (II), R ⁵ is a hydrocarbon group, — [CH (R ⁶ ) —CH (R ⁷ ) —O] _x —R ⁸ or — [(CH ₂ ) _y —O] _z —R ^8. Indicates.
The hydrocarbon group for R ⁵ is preferably an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms, an aralkyl group, or an aryl group.
The alkyl group having 1 to 18 carbon atoms may be linear, branched or cyclic, such as a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, 2 -Ethylhexyl group, 2-ethoxyethyl group, cyclopentyl group, cyclohexyl group, bornyl group, isobornyl group, dicyclopentanyl group, dicyclopentenyl group, adamantyl group, lower alkyl group-substituted adamantyl group and the like can be mentioned.
The alkenyl group having 2 to 18 carbon atoms may be linear, branched or cyclic. Examples of such an alkenyl group include a vinyl group, an allyl group, and a propenyl group. The position of the double bond of the alkenyl group is not limited, but from the viewpoint of the reactivity of the polymer obtained, it is preferable that there is a double bond at the terminal of the alkenyl group.
Examples of the aliphatic hydrocarbon substituent such as an alkyl group or an alkenyl group include a nitro group and a halogen atom.

Examples of the aryl group include a phenyl group, a biphenyl group, a naphthyl group, a tolyl group, and a xylyl group, and may further have a substituent. 6-24 are preferable and, as for the carbon atom number of an aryl group, 6-12 are more preferable.
Moreover, as an aralkyl group, a benzyl group, a phenethyl group, a naphthylmethyl group, a biphenylmethyl group, etc. are mentioned, Furthermore, you may have a substituent. 7-20 are preferable and, as for the carbon atom number of an aralkyl group, 7-14 are more preferable.
Examples of the substituent of the aromatic ring such as an aryl group and an aralkyl group include an alkenyl group, a nitro group, and a halogen atom in addition to a linear or branched alkyl group having 1 to 4 carbon atoms.
The preferred number of carbon atoms does not include the number of carbon atoms of the substituent.

In the above R ⁵ , x is an integer of 1-18, preferably an integer of 1-4, more preferably an integer of 1-2, and y is an integer of 1-5, preferably an integer of 1-4, more preferably. Is 2 or 3. z is an integer of 1-18, preferably an integer of 1-4, more preferably an integer of 1-3.

The hydrocarbon group for R ⁸ can be the same as that shown for R ⁵ above.
R ⁹ is a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and may be linear, branched, or cyclic.
Moreover, R ⁵ in the structural unit represented by the general formula (II) may be the same or different from each other.

The R ⁵ is preferably selected so as to be excellent in compatibility with a solvent described later. Specifically, for example, the solvent is generally used as a solvent for a white coloring composition for a color filter. When using a glycol ether acetate solvent, ether solvent, ester solvent or the like, it is preferably a hydrocarbon group, especially an alkyl group having 1 to 18 carbon atoms or an aralkyl group. In particular, a methyl group, an ethyl group, an isobutyl group, an n-butyl group, a 2-ethylhexyl group, a benzyl group, and the like are preferable from the viewpoint of improving solvent resolubility. In addition, by improving dissolution and re-dissolvability, even when a white colored composition adheres to the tip of the die lip when applied by a die coater or the like and a solidified product is generated by drying, it is solidified when application is resumed. A thing becomes easy to melt | dissolve in a white coloring composition, and generation | occurrence | production of a foreign material defect can be suppressed.

Furthermore, R ⁵ may be substituted with a substituent such as an alkoxy group, a hydroxyl group, an epoxy group, or an isocyanate group as long as the dispersion performance of the block copolymer is not hindered. After the synthesis of the polymer, the substituent may be added by reacting with the compound having the substituent. Among these, the substituent is preferably a hydroxyl group from the viewpoint of improving development adhesion and development speed.

  The number of structural units constituting the B segment is not particularly limited, but is within the range of 10 to 300 from the viewpoint that the solvophilic site and the adsorption site for the pigment act effectively and improve the dispersibility of the pigment. Preferably, it is preferably in the range of 10 to 100, more preferably in the range of 10 to 70.

  In the B segment in the block copolymer, the content of the structural unit represented by the general formula (II) is based on the total mass of all the structural units of the B segment from the viewpoint of improving the solvent-solubility and pigment dispersibility. In addition, it is preferably in the range of 50% by mass to 100% by mass, and more preferably in the range of 70% by mass to 100% by mass. In addition, the content rate of the said structural unit is computed from the preparation mass at the time of synthesize | combining B segment.

  Further, the content ratio of the structural unit represented by the general formula (II) in the block copolymer is particularly as long as the amine value of the block copolymer can be within the predetermined range. Although not limited, from the viewpoint of improving pigment dispersibility, it is preferably in the range of 40% by mass to 95% by mass with respect to the total mass of all the structural units of the block copolymer. More preferably, it is in the range of mass% to 90 mass%. In addition, the content rate of the said structural unit is computed from the preparation mass at the time of synthesize | combining the said block copolymer.

  The B segment may be appropriately selected from structural units so as to function as a solvophilic moiety, and the structural unit represented by the general formula (II) may be composed of one kind, or two or more kinds. The structural unit may be included. Two or more structural units included in the B segment may be randomly arranged in the block.

Moreover, in this invention, it is preferable from the point which improves the developability and the inhibitory effect of a development residue that the B segment of a block copolymer contains the structural unit derived from a carboxy-group containing monomer.
As the carboxy group-containing monomer used in the present invention, a monomer containing an unsaturated double bond copolymerizable with a monomer that derives the structural unit represented by the general formula (I) and a carboxy group can be used. .
Examples of such monomers include (meth) acrylic acid, vinyl benzoic acid, maleic acid, maleic acid monoalkyl ester, fumaric acid, itaconic acid, crotonic acid, cinnamic acid, acrylic acid dimer, and the like. In addition, as the monomer, an addition reaction product of a monomer having a hydroxyl group such as 2-hydroxyethyl (meth) acrylate and a cyclic anhydride such as maleic anhydride, phthalic anhydride, or cyclohexanedicarboxylic anhydride, ω -Carboxy-polycaprolactone mono (meth) acrylate and the like can also be used. Moreover, you may use acid anhydride group containing monomers, such as maleic anhydride, itaconic anhydride, and citraconic anhydride, as a precursor of a carboxy group. Among these, (meth) acrylic acid is particularly preferable as the monomer in terms of copolymerizability, cost, solubility, glass transition temperature, and the like.

Moreover, the content ratio of the structural unit derived from a carboxy group-containing monomer in the block copolymer can make the amine value of the block copolymer within the predetermined range, and further obtain desired developability. Although it will not specifically limit if it is a thing, It is preferable to exist in the range of 0.05 mass%-4.5 mass% with respect to the total mass of all the structural units of the said block copolymer, 0.07 mass% More preferably, it is in the range of -3.7% by mass.
In addition, the structural unit derived from a carboxy group-containing monomer may be composed of one kind or may contain two or more kinds of structural units.

(Iii) Others In the block copolymer, the ratio m / n between the unit number m of the structural unit of the A segment and the unit number n of the structural unit of the B segment is 0.05 to 1.5. It is preferably within the range, and more preferably within the range of 0.1 to 1.0 from the viewpoint of the dispersibility and dispersion stability of the pigment.

The block copolymer may not contain a carboxy group, but preferably has a carboxy group, and the block copolymer has an acid value of 18 mgKOH / g or less, preferably 16 mgKOH / g. More preferably, it is as follows. This is because deterioration of solvent re-solubility and development adhesion can be prevented.
The block copolymer has a carboxy group, and the acid value of the block copolymer is preferably 1 mgKOH / g or more, and more preferably 2 mgKOH / g or more. This is because the effect of suppressing development residue is improved.
In addition, in this invention, the acid value of the said block copolymer represents the mass (mg) of potassium hydroxide required in order to neutralize the acidic component contained in 1g of solid content of a block copolymer, and is JISK. It is a value measured by the method described in 0070.

Although the weight average molecular weight Mw of the said block copolymer is not specifically limited, It is preferable that it is 1000-20000 from the point which makes a pigment dispersibility and dispersion stability favorable, and it is more preferable that it is 2000-15000. More preferably, it is 3000-12000.
Here, the weight average molecular weight Mw is determined as a standard polystyrene equivalent value by gel permeation chromatography (GPC). For the measurement, HLC-8120GPC manufactured by Tosoh Corporation was used, the elution solvent was N-methylpyrrolidone to which 0.01 mol / liter of lithium bromide was added, and the polystyrene standard for calibration curve was Mw377400, 210500, 96000, 50400. , 20650, 10850, 5460, 2930, 1300, 580 (Easy PS-2 series manufactured by Polymer Laboratories) and Mw1090000 (manufactured by Tosoh Corporation), and TSK-GEL ALPHA-M × 2 (Tosoh Corporation) (Made by Co., Ltd.). In addition, the said measurement can be performed on the said conditions also about the graft copolymer mentioned later and the macromonomer used as the raw material.

  In the present invention, the arrangement of each block of the block copolymer is not particularly limited, and for example, an AB block copolymer, an ABA block copolymer, a BAB block copolymer, and the like can be used. Among these, from the viewpoint of excellent dispersibility, the block copolymer is preferably an AB block copolymer or an ABA block copolymer.

  The manufacturing method of the said block copolymer is not specifically limited. Although a block copolymer can be produced by a known method, it is preferable to produce it by a living polymerization method. This is because chain transfer and deactivation are unlikely to occur, a copolymer having a uniform molecular weight can be produced, and dispersibility and the like can be improved. Examples of the living polymerization method include a living anionic polymerization method such as a living radical polymerization method and a group transfer polymerization method, and a living cation polymerization method. A copolymer can be produced by sequentially polymerizing monomers by these methods. For example, a block copolymer can be produced by first producing the A segment and polymerizing the structural units constituting the B segment to the A segment. In the above production method, the order of polymerization of the A segment and the B segment can be reversed. Further, the A segment and the B segment can be manufactured separately, and then the A segment and the B segment can be coupled.

(B) Graft copolymer The graft copolymer in the present invention is not particularly limited as long as it has the A segment. For example, the A segment and a plurality of side chains in the A segment are provided. Having a B segment that binds and functions as a solvophilic site, or has a B segment that functions as a solvophilic site, and the A segment that binds to the B segment as a side chain. It can be.
The A segment and the B segment can be the same as the A segment and the B segment described in the section “(a) Block copolymer”, and thus the description thereof is omitted here.
In the graft copolymer, the ratio m / l of the unit number m of the structural unit of the A segment and the number of units 1 of the structural unit of the B segment, the acid value, and the weight average molecular weight Mw are also described above. Since it can be the same as the unit number ratio m / n, acid value, and weight average molecular weight Mw described in the section (a) Block copolymer, description thereof is omitted here.

As a method for producing a graft copolymer, any method can be used as long as it can form a graft copolymer having a desired structure. For example, as a method for producing a plurality of B segments bonded to the A segment as side chains, Examples thereof include a method of preparing a macromonomer having an ethylenically unsaturated double bond at the end of the B segment and randomly copolymerizing the macromonomer with a monomer component capable of forming a constituent unit of the A segment.
Similarly, as a method for producing a plurality of A segments bonded as side chains to the B segment, a macromonomer having an ethylenically unsaturated double bond at the end of the A segment is prepared. And a random copolymerization method with a monomer component capable of forming the structural unit.

(C) Salt-forming site In the present invention, at least a part of the terminal nitrogen site of the structural unit represented by the general formula (I) of the block copolymer or graft copolymer is represented by the following general formula (1). ) To (3) to form a salt with one or more salt-forming compounds selected from the group consisting of the above-mentioned block copolymer or graft copolymer as a salt-type block copolymer or salt-type graft copolymer It may be used.
In the salt-type block copolymer and the salt-type graft copolymer, the pigment adsorptivity is further improved and the pigment dispersibility is improved at the salt-forming site in the structural unit represented by the general formula (I). Are preferably used.

(In General Formula (1), R ^a is a linear, branched or cyclic alkyl group having 1 to 20 carbon atoms, a vinyl group, an optionally substituted phenyl group or benzyl group, or —O—. R ^e is represented, and R ^e is a linear, branched or cyclic alkyl group having 1 to 20 carbon atoms, a vinyl group, an optionally substituted phenyl group or benzyl group, or a carbon number having 1 to 4 carbon atoms. Represents a (meth) acryloyl group via an alkylene group. In the general formula (2), R ^b , R ^{b ′} and R ^{b ″} each independently have a hydrogen atom, an acidic group or an ester group thereof, and a substituent. A linear, branched or cyclic alkyl group having 1 to 20 carbon atoms, a vinyl group which may have a substituent, a phenyl group or a benzyl group which may have a substituent, or -O- It represents R ^{f, R f} is a also a good number of 1 to 20 carbon having substituent Via a chain, branched or cyclic alkyl group, a vinyl group which may have a substituent, a phenyl group or a benzyl group which may have a substituent, or an alkylene group having 1 to 4 carbon atoms (meth) Represents an acryloyl group, and X represents a chlorine atom, a bromine atom, or an iodine atom, In the general formula (3), R ^c and R ^d are each independently a hydrogen atom, a hydroxyl group, or a straight chain having 1 to 20 carbon atoms. Represents a branched or cyclic alkyl group, a vinyl group, an optionally substituted phenyl group or benzyl group, or —O—R ^e , where R ^e is a linear or branched chain having 1 to 20 carbon atoms. Or a cyclic alkyl group, a vinyl group, a phenyl group or benzyl group which may have a substituent, or a (meth) acryloyl group via an alkylene group having 1 to 4 carbon atoms, provided that R ^c and R ^d At least one of contains a carbon atom. )

In the general formulas (1) to (3), R ^a , R ^b , R ^{b ′} , R ^{b ″} , R ^c , R ^d , R ^e , and R ^f, a straight chain or branched chain having 1 to 20 carbon atoms Alternatively, the cyclic alkyl group may be linear or branched, and may contain a cyclic structure. Specifically, a methyl group, an ethyl group, an n-propyl group, an i-propyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, n-pentyl group, n-hexyl group, n-heptyl group, n-octyl group, n-nonyl group, n-decyl group, n- Examples thereof include an undecyl group, a dodecyl group, a cyclopentyl group, a cyclohexyl group, a tetradecyl group, an octadecyl group, etc. The alkyl group is preferably a linear, branched or cyclic alkyl group having 1 to 15 carbon atoms. Even better Preferably, a linear, branched or cyclic alkyl group having 1 to 8 carbon atoms is used.
In R ^a , R ^c , R ^d , and R ^e , examples of the substituent of the phenyl group or benzyl group that may have a substituent include an alkyl group having 1 to 5 carbon atoms and an acyl group. And an acyloxy group.

In R ^b , R ^{b ′} , R ^{b ″} , and R ^f , examples of the substituent of the phenyl group or benzyl group that may have a substituent include an acidic group or an ester group thereof, and those having 1 to 1 carbon atoms. 5 alkyl groups, acyl groups, acyloxy groups and the like.
In R ^b , R ^{b ′} , R ^{b ″} , and R ^f , as a substituent of a linear, branched or cyclic alkyl group having 1 to 20 carbon atoms which may have a substituent, or a vinyl group Includes an acidic group or an ester group thereof, a phenyl group, an acyl group, an acyloxy group, and the like.
In R ^b , R ^{b ′} , R ^{b ″} , and R ^f , the acidic group refers to a group that exhibits acidity by releasing protons in water. Specific examples of the acidic group include a carboxy group (—COOH), A sulfo group (—SO ₃ H), a phosphono group (—P (═O) (OH) ₂ ), a phosphinico group (> P (═O) (OH)), a boronic acid group (—B (OH) ₂ ), A borinic acid group (> BOH) and the like, and an anion having a hydrogen atom dissociated such as a carboxylate group (—COO ⁻ ), and a salt of an alkali metal ion such as sodium ion or potassium ion It may be an acid salt formed.
Moreover, as an ester group of an acidic group, carboxylic acid ester (—COOR), sulfonic acid ester (—SO ₃ R), phosphoric acid ester (—P (═O) (OR) ₂ ), (> P (═O ) (OR)), boronic acid ester (—B (OR) ₂ ), borinic acid ester (> BOR) and the like. Among them, the acidic ester group is preferably a carboxylic acid ester (—COOR) from the viewpoint of dispersibility and dispersion stability. R is a hydrocarbon group and is not particularly limited, but is preferably an alkyl group having 1 to 5 carbon atoms, and is preferably a methyl group or an ethyl group, from the viewpoint of dispersibility and dispersion stability. More preferred.

The compound represented by the general formula (2) includes a carboxy group, a boronic acid group, a borinic acid group, anions thereof, and alkali metal salts thereof from the viewpoints of dispersibility, dispersion stability, alkali developability, and development residue suppression. It is preferable to have one or more functional groups selected from these ester groups, and among them, it is more preferable to have a functional group selected from a carboxy group, a carboxylate group, a carboxylic acid group, and a carboxylic acid ester. It is particularly preferable to contain a carboxy group.
When the compound of the general formula (2) has an acidic group and an ester group thereof (hereinafter referred to as an acidic group or the like), both of the acidic group and the like and the halogen atom side hydrocarbon of the compound have a terminal nitrogen. Although it is possible to form a salt with the site, it is presumed that the terminal nitrogen site and the halogen atom-side hydrocarbon form a salt more stably than when the terminal nitrogen site and an acidic group form a salt. And it is estimated that a dispersibility and dispersion stability improve because a pigment adsorb | sucks to the salt formation site | part which exists stably. Further, when the compound of the general formula (2) has an acidic group or the like, the dispersant is excellent in alkali developability. In particular, when the copolymer has an acid value, that is, when the solvophilic portion (B segment) of the copolymer contains a structural unit derived from an acidic group-containing monomer such as a carboxy group and has an acid value. In addition, the above-mentioned acidic group or the like that increases the acid value at the salt-forming site increases the effect of suppressing development residue. It should be noted that the above-mentioned acidic group that increases the acid value at the salt-forming site means that the acidic group that forms a salt by reacting with the terminal nitrogen site of the structural unit represented by the general formula (I) And having an acidic group that does not form a salt directly with the nitrogen moiety. For example, when the compound of the general formula (2) has an acidic group or the like, the compound of the general formula (2) is converted into a terminal nitrogen moiety and halogen atom side carbonization of the structural unit represented by the general formula (I). Since hydrogen forms a salt, the salt-forming site has an acidic group that does not form a salt, and the acid value is increased.

  When the compound of the general formula (2) has the acidic group or the like, it may have two or more acidic groups or the like. In the case of having two or more acidic groups or the like, a plurality of the acidic groups or the like may be the same or different. The number of the acidic groups and the like of the compound of the general formula (2) is preferably 1 to 3, more preferably 1 to 2, and still more preferably 1.

R ^a in the general formula (1), at least one of R ^b , R ^{b ′} and R ^{b ″ in} the general formula (2), and at least one of R ^c and R ^d in the general formula (3) When one of them has an aromatic ring, the affinity with the skeleton of the pigment described later is improved, the dispersibility and dispersion stability of the pigment are excellent, and a colored composition with little pixel unevenness can be obtained. It is preferable from the point which can be performed.

  The molecular weight of one or more compounds selected from the group consisting of the above general formulas (1) to (3) is preferably 1000 or less from the viewpoint of improving pigment dispersibility, and particularly within the range of 50 to 800. It is preferably within a range of 50 to 400, more preferably within a range of 80 to 350, and most preferably within a range of 100 to 330.

Examples of the compound represented by the general formula (1) include benzene sulfonic acid, vinyl sulfonic acid, methane sulfonic acid, p-toluene sulfonic acid, monomethyl sulfuric acid, monoethyl sulfuric acid, mono n-propyl sulfuric acid and the like. As the above compound, a hydrate such as p-toluenesulfonic acid monohydrate may be used.
Examples of the compound represented by the general formula (2) include methyl chloride, methyl bromide, ethyl chloride, ethyl bromide, methyl iodide, ethyl iodide, n-butyl chloride, hexyl chloride, octyl chloride, dodecyl chloride, Tetradecyl chloride, hexadecyl chloride, phenethyl chloride, benzyl chloride, benzyl bromide, benzyl iodide, chlorobenzene, α-chlorophenylacetic acid, α-bromophenylacetic acid, α-iodophenylacetic acid, 4-chloromethylbenzoic acid, 4-bromomethyl Examples include benzoic acid, 4-iodophenylbenzoic acid, chloroacetic acid, bromoacetic acid, iodoacetic acid, methyl α-bromophenylacetate, 3- (bromomethyl) phenylboronic acid, and the like.
Examples of the compound represented by the general formula (3) include monobutyl phosphoric acid, dibutyl phosphoric acid, methyl phosphoric acid, dibenzyl phosphoric acid, diphenyl phosphoric acid, phenylphosphinic acid, phenylphosphonic acid, dimethacryloyloxyethyl acid phosphate and the like. .
As one or more kinds of compounds selected from the group consisting of the above general formulas (1) to (3), phenylphosphinic acid, phenylphosphonic acid, dimethacryloyloxyethyl acid phosphate, dibutylphosphoric acid are particularly preferred because of their excellent dispersion stability. One or more selected from the group consisting of acid, benzyl chloride, benzyl bromide, vinyl sulfonic acid, and p-toluene sulfonic acid monohydrate are preferred, among which phenylphosphinic acid, phenylphosphonic acid, benzyl bromide, vinyl sulfone It is preferable to use at least one selected from the group consisting of acids and p-toluenesulfonic acid monohydrate.
Moreover, as one or more kinds of compounds selected from the group consisting of the above general formulas (1) to (3), the development residue can be obtained by combining with the above copolymer having excellent dispersion stability and acid value. Select from the group consisting of α-chlorophenylacetic acid, α-bromophenylacetic acid, α-iodophenylacetic acid, 4-chloromethylbenzoic acid, 4-bromomethylbenzoic acid, and 4-iodophenylbenzoic acid from the viewpoint of improving the inhibitory effect. One or more of these are also preferably used.

In the salt copolymer, the content of one or more compounds selected from the group consisting of the above general formulas (1) to (3) is the terminal nitrogen of the structural unit represented by the general formula (I) From the group consisting of the above general formulas (1) to (3) with respect to 1 mol of the terminal nitrogen moiety of the structural unit represented by the general formula (I) because it forms a salt with the site. One or more selected compounds are preferably 0.01 mol or more, more preferably 0.05 mol or more, further preferably 0.1 mol or more, and 0.2 mol or more. It is particularly preferable to do this. When it is at least the above lower limit value, the effect of improving the pigment dispersibility by salt formation is likely to be obtained. Similarly, it is preferably 0.7 mol or less, more preferably 0.6 mol or less, further preferably 0.5 mol or less, and particularly preferably 0.4 mol or less. It can be excellent in dispersibility and solvent re-dissolvability as it is below the upper limit.
In addition, the 1 or more types of compound selected from the group which consists of said general formula (1)-(3) may be used individually by 1 type, and may combine 2 or more types. When combining 2 or more types, it is preferable that the total content is in the above range.

As a method for preparing the salt-type copolymer, one or more compounds selected from the group consisting of the general formulas (1) to (3) are added to a solvent in which the copolymer is dissolved or dispersed. Examples of the method include stirring and, if necessary, heating.
In addition, the terminal nitrogen part which the structural unit represented by the said general formula (I) of the said copolymer has, and 1 or more types of compounds selected from the group which consists of said general formula (1)-(3), The formation of a salt and the proportion thereof can be confirmed by a known method such as NMR.

The amine value of the salt copolymer is preferably 0 mgKOH / g to 120 mgKOH / g, and more preferably 0 mgKOH / g to 110 mgKOH / g.
If it is below the above upper limit, the compatibility with other components is excellent, and the solvent resolubility becomes good.

In addition, the amine value of the salt type copolymer salt-formed by the compound represented by the general formula (2) among the salt type copolymers is a value measured by the method described in JIS K 7237. can do. In the compound of the general formula (2), since the terminal nitrogen moiety of the structural unit represented by the general formula (I) and the halogen atom side hydrocarbon form a salt, the salt is also formed by the measurement method. This is because the amine value can be measured without any change.
On the other hand, among the salt-type copolymers, the amine value of the salt-type copolymer that is salt-formed by the compound represented by the general formula (1) or (3) is the above-described copolymer weight before salt formation. It calculates | requires by calculating as follows from the amine titer of a coalescence. In the compound represented by the general formula (1) or (3), the terminal nitrogen site and the acidic group of the structural unit represented by the general formula (I) form a salt. This is because when the amine value of the polymer is measured by the method described in JIS K 7237, the state of salt formation is changed and an accurate value cannot be measured.
First, the amine value of the copolymer before salt formation is determined by the method described above. Next, from 13C-NMR, from the group consisting of the above general formula (1) or (3) with respect to the terminal nitrogen moiety of the structural unit represented by the general formula (I) of the salt copolymer The reaction rate of one or more selected compounds (the ratio of the nitrogen sites at the terminals where salts are formed) is measured. The terminal nitrogen moiety of the structural unit represented by the general formula (I) formed by salt formation of one or more compounds selected from the group consisting of the above general formula (1) or (3) has an amine value of 0. As a result of salt formation, calculated by (amine value of copolymer before salt formation) × (nitrogen moiety ratio (%) / 100 at the end of salt formation calculated from 13C-NMR spectrum) It is determined by subtracting the consumed amine value from the amine value of the copolymer before salt formation.
Amine value of salt-type copolymer = {amine value of copolymer before salt formation measured by the method described in JIS K 7237}-{copolymer before salt formation measured by the method described in JIS K 7237 Amine value of polymer} × {Nitrogen moiety ratio (%) / 100} at the terminal of salt formation calculated from 13C-NMR spectrum

  In the salt-type copolymer, the acid value of the copolymer before salt formation is 18 mgKOH / g or less, and the acid value of the salt-type copolymer is 55 mgKOH / g or less. It is preferable from the viewpoint that deterioration of re-solubility and development adhesion can be prevented.

As described above, the acid value of the copolymer before salt formation represents the mass (mg) of potassium hydroxide required to neutralize the acidic component contained in 1 g of the solid content of the copolymer, and is in accordance with JIS K 0070. It is a value measured by the method of description.
Further, the acid value of the salt copolymer in which the salt copolymer is salt-formed with the compound represented by the general formula (2) is also a value measured by the method described in JIS K 0070. . In the compound of the general formula (2), since the terminal nitrogen moiety of the structural unit represented by the general formula (I) and the halogen atom side hydrocarbon form a salt, the salt is also formed by the measurement method. This is because it can be measured without change.
On the other hand, when the salt-type copolymer is a salt-type copolymer that is salt-formed by the compound represented by the general formula (1) or (3), the acidic group used for salt formation is excluded. The acid value is calculated. This is because the acidic group used for salt formation does not function as an acidic group that increases the acid value of the dispersant. Therefore, in this application, the acid value of the salt-type copolymer salt-formed by the compound represented by the general formula (1) or (3) is calculated by a value obtained by the following formula. When the acid value of the salt-type copolymer salt-formed by the compound represented by the general formula (1) or (3) is measured by the method described in JIS K 0070, the salt-forming state is changed. This is because an accurate value cannot be measured.

Acid value of salt copolymer = {total acid value of compound represented by general formula (1) or (3) used for salt formation−acid value consumed by salt formation} + copolymer before salt formation Here, the total acid value of the compound represented by the general formula (1) or (3) used for the salt formation can be measured by the method described in JIS K0070. . On the other hand, the acid value consumed by salt formation is calculated from the salt formation ratio obtained by NMR.
Specifically, the acid value consumed by salt formation is determined by, for example, measuring a 13C-NMR spectrum using a nuclear magnetic resonance apparatus, and in the obtained spectrum data, nitrogen that is not salt-formed at the terminal nitrogen site. From the ratio of the integrated value of the carbon atom peak adjacent to the atom and the carbon atom peak adjacent to the salt formed nitrogen atom, the ratio of the number of terminal nitrogen sites formed to the salt to the total number of terminal nitrogen sites is calculated. . (Amine number of the copolymer before salt formation measured by the method described in JIS K 7237) × (nitrogen site ratio (%) / 100 at the terminal of salt formation calculated from 13C-NMR spectrum) The consumed amine value is calculated, and this value is the same as the acid value consumed by salt formation.
However, when 1 mol or less of the compound represented by the general formula (1) is formed with respect to 1 mol of the terminal nitrogen moiety of the structural unit represented by the general formula (I), the acidic group is 1 When the salt of the compound represented by the above general formula (3) is formed at 1 mol or less, or the compound represented by the above general formula (3) having two acidic groups is salted at 0.5 mol or less. When forming, if the total amount of acidic groups forms a salt with the terminal nitrogen moiety of the structural unit represented by the general formula (I), in the salt-type copolymer after the salt formation, the acidic group is Since it does not affect the acid value, it has the same acid value as the copolymer before salt formation.
On the other hand, when the compound represented by the general formula (3) having two acidic groups is added in a number of moles exceeding the above, there is an acidic group that is not salt-formed in the dispersant even after the salt is formed. Therefore, as shown in the above formula, the acid value of the acidic group not forming a salt is added to the acid value of the copolymer before salt formation to calculate the acid value of the dispersant.

(3) Others The content of the dispersant is not particularly limited as long as the pigment can be stably dispersed, but is 3 parts by mass to 45 parts by mass with respect to 100 parts by mass of the total solid content. It is preferable to mix | blend in the ratio within the range of 5 mass parts-35 mass parts more preferably.
In the present invention, the total solid content includes all components other than the solvent described above, and includes a polyfunctional monomer dissolved in the solvent.

2. Pigment In the pigment of the present invention, the P / V ratio, which is the mass ratio between the pigment (P: Pigment) and the total solid content other than the pigment (V: Vehicle), is 0.001 or more and 0.1 or less. It is contained in.

The P / V ratio, which is the mass ratio of the pigment and the total solid content other than the pigment, is not particularly limited as long as it is 0.001 or more and 0.1 or less, but is 0.002 or more and 0.08 or less. In particular, it is preferably 0.003 or more and 0.06 or less. It is because the white coloring composition which can form the cured film of a desired chromaticity coordinate and film thickness can be obtained because the said P / V ratio is in the above-mentioned range.
The total solid content other than the pigment includes all components other than the solvent and the pigment.

The pigment composition of the pigment is not particularly limited as long as it can form a white colored layer of a desired color, and includes only one type of pigment, or includes two or more different color pigments. Also good.
The pigment has a chromaticity coordinate in the XYZ color system of JIS Z8701 measured by using a C light source such that 0.22 ≦ x ≦ 0.38 and 0.22 ≦ y ≦ 0.39. It is preferable that the pigment composition is capable of forming a certain cured film, and among them, a pigment capable of forming a cured film satisfying 0.24 ≦ x ≦ 0.36 and 0.25 ≦ y ≦ 0.38. A composition is preferred.
When the pigment is a pigment composition capable of forming a cured film having the chromaticity coordinates described above, the white colored composition of the present invention is more suitable for forming a white colored layer of a color filter used in a display device. Because.
The pigment preferably includes at least one of a green pigment, a blue pigment, and a violet pigment, and more preferably includes at least a green pigment or a violet pigment. This is because by using the pigment, the white colored composition of the present invention is more suitable for forming a white colored layer of a color filter used in a display device.
Specific examples of the pigment composition including at least a green pigment or a purple pigment include a green pigment-blue pigment, a green pigment-violet pigment, a purple pigment-yellow pigment, a purple pigment-red pigment, and a purple pigment-blue pigment. A combination of three colors such as a combination of colors, green pigment-purple pigment-blue pigment, green pigment-purple pigment-red pigment, and the like can be given.
The chromaticity coordinates x and y refer to the chromaticity x and chromaticity y in the XYZ color system of JIS Z8701, and can be measured using an OSP-SP200 microspectrophotometric device manufactured by Olympus Corporation. The measurement conditions were as follows: the light source was a C light source, the illumination magnification was 20 times, and the pinhole no. 7 (50 μm).

  The pigment is not particularly limited as long as it can form a desired color when a white colored layer of a color filter is formed, and various organic pigments, inorganic pigments, dispersible dyes (lake pigments), It can be used alone or in combination of two or more. Among these, organic pigments are preferably used because they have high color developability and high heat resistance. Examples of the organic pigment include compounds classified as pigments in the Color Index (CI; issued by The Society of Dyers and Colorists), specifically, the following color index (C.I. .) Can be listed with numbers.

Specific examples of the organic pigment include C.I. I. And CI Pigment Green 7, 36, 58, 59.
Examples of the blue pigment include C.I. I. Pigment blue 1, 15, 15: 3, 15: 4, 15: 6, 60, and the like.
Examples of the purple pigment include C.I. I. Pigment violet 1, 19, 23, 29, 32, 36, 38, and the like.

Examples of yellow pigments include C.I. I. Pigment Yellow 1, 3, 12, 13, 14, 15, 16, 17, 20, 24, 31, 55, 60, 61, 65, 71, 73, 74, 81, 83, 93, 95, 97, 98, 100, 101, 104, 106, 108, 109, 110, 113, 114, 116, 117, 119, 120, 126, 127, 128, 129, 138, 139, 150, 150 derivatives, 151, 152, 153, 154, 155, 156, 166, 168, 175, 185 and the like.
Examples of orange pigments include C.I. I. Pigment orange 1, 5, 13, 14, 16, 17, 24, 34, 36, 38, 40, 43, 46, 49, 51, 61, 63, 64, 71, 73, and the like.
Examples of red pigments include C.I. I. Pigment Red 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 21, 22, 23, 30, 31, 32, 37, 38, 40, 41, 42, 48: 1, 48: 2, 48: 3, 48: 4, 49: 1, 49: 2, 50: 1, 52: 1, 53: 1, 57, 57: 1, 57: 2, 58: 2, 58: 4, 60: 1, 63: 1, 63: 2, 64: 1, 81: 1, 83, 88, 90: 1, 97, 101, 102, 104, 105, 106, 108, 112, 113, 114, 122, 123, 144, 146, 149, 150, 151, 166, 168, 170, 171, 172, 174, 175, 176, 177, 178, 179, 180, 185, 187, 188, 190, 193, 194, 202, And the like can be given 06,207,208,209,215,216,220,224,226,242,243,245,254,255,264,265.
Examples of brown pigments include C.I. I. And CI pigment brown 23 and 25.
Examples of black pigments include C.I. I. And CI pigment black 1 and 7.

Specific examples of inorganic pigments include white pigments such as titanium oxide, barium sulfate, calcium carbonate, zinc white, and lead sulfate.
Examples of yellow pigments include yellow lead and zinc yellow.
Examples of red pigments include bengara (red iron oxide (III)) and cadmium red.
Examples of blue pigments include ultramarine blue and bitumen.
Examples of the green pigment include chromium oxide green and cobalt green.
Examples of brown pigments include amber.
Examples of black pigments include titanium black, synthetic iron black, and carbon black.

Examples of the dispersible dye include dyes (lake pigments) that can be dispersed by imparting various substituents to the dye or insolubilizing in a solvent using a known lake (chlorination) technique. Can be mentioned. By using such a dispersible dye in combination with the above dispersant, the dispersibility and dispersion stability of the dye can be improved.
The dispersible dye can be appropriately selected from conventionally known dyes.
Examples of the dye before insolubilization include azo dyes, metal complex azo dyes, anthraquinone dyes, triphenylmethane dyes, xanthene dyes, cyanine dyes, naphthoquinone dyes, quinoneimine dyes, methine dyes, and phthalocyanine dyes.
As a guide, if the amount of dye dissolved in 10 g of solvent (or mixed solvent) is 10 mg or less, it can be determined that the dye can be dispersed in the solvent (or mixed solvent).

The average primary particle size of the pigment used in the present invention is not particularly limited as long as it can produce a desired color in the case of a white colored layer of a color filter, and varies depending on the type of pigment used. It is preferably in the range of 10 nm to 100 nm, and more preferably in the range of 15 nm to 60 nm. When the average primary particle diameter of the pigment is in the above range, the display device including the color filter manufactured using the white coloring composition of the present invention has less display unevenness, high brightness, and high quality. can do.
In addition, the average primary particle diameter of the pigment in the present invention represents “volume distribution median diameter (D50)”. The average primary particle size of the pigment is obtained by attaching a dedicated bright-field STEM sample stage and an optional detector to a field emission scanning electron microscope (S-4800) manufactured by Hitachi High-Technologies Corporation. (Hereinafter abbreviated as “STEM”), take a 200,000-fold STEM photograph, import it into the following software, select 100 pigments arbitrarily on the photograph, each diameter (passing length) Is determined as a 50% cumulative particle size by volume from a volume-based distribution.
A measurement sample to be subjected to STEM is prepared by mixing a pigment and toluene and dropping the mixture on a collodion membrane-attached mesh. Further, when obtaining a volume-based particle size distribution or volume distribution median diameter (D50) from the STEM photograph, image analysis type particle size distribution measurement software “Mac-View Ver. 4” manufactured by Mountec Co., Ltd. is used.

  The pigment used in the present invention can be produced by a known method such as a recrystallization method or a solvent salt milling method. Commercially available pigments may be used after being refined.

  The pigment may be a pigment alone or a surface-treated pigment.

3. Photoinitiator The photoinitiator used for this invention can polymerize the said polyfunctional monomer and alkali-soluble resin by exposure, and can harden the said white coloring composition.
Such a photoinitiator may include at least a photopolymerization initiator that generates free radicals upon exposure.
Moreover, in this invention, although the said photoinitiator may contain only a photoinitiator, it is preferable that the said photoinitiator contains a photosensitizer with a photoinitiator. A photosensitizer absorbs irradiated energy when exposed to light, and contributes to the initiation of the reaction of the photopolymerization initiator or plays a role in a reaction chain. For this reason, when a photoinitiator contains a photosensitizer with a photoinitiator, the curing reaction by a photoinitiator can be controlled more accurately. This is because the white colored composition of the present invention can easily adjust the curing reaction.

(1) Photopolymerization initiator The photopolymerization initiator may be any photopolymerization initiator as long as it can generate free radicals upon receiving light irradiation. Among various photopolymerization initiators known in the art, 1 Species or a combination of two or more can be used. Specific examples of the photopolymerization initiator include those described in JP2013-029832A.

More specifically, the photopolymerization initiator is a compound that generates free radicals by the energy of ultraviolet rays, and is a benzophenone derivative such as benzoin or benzophenone or a derivative thereof such as oxime ester compound; chlorosulfonyl, chloro Halogenated compounds such as methyl polynuclear aromatic compounds, chloromethyl heterocyclic compounds, chloromethylbenzophenones; triazines; fluorenones; haloalkanes; redox couples of photoreducing dyes and reducing agents; organic sulfur compounds; Oxides; compounds having a tertiary amine structure;
Specific examples of the photopolymerization initiator include Michler's ketone, 4,4'-bisdiethylaminobenzophenone, 4-methoxy-4'-dimethylaminobenzophenone, 2-ethylanthraquinone, phenanthrene and other aromatic ketones, benzoin methyl Benzoin ethers such as ether, benzoin ethyl ether and benzoin phenyl ether, benzoin such as methyl benzoin and ethyl benzoin, 2- (o-chlorophenyl) -4,5-phenylimidazole dimer, 2- (o-chlorophenyl)- 4,5-di (m-methoxyphenyl) imidazole dimer, 2- (o-fluorophenyl) -4,5-diphenylimidazole dimer, 2- (o-methoxyphenyl) -4,5-diphenylimidazole Dimer, 2,4,5-triarylimi Dazole dimer, 2- (o-chlorophenyl) -4,5-di (m-methylphenyl) imidazole dimer, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone, 2-trichloromethyl-5-styryl-1,3,4-oxadiazole, 2-trichloromethyl-5- (p-cyanostyryl) -1,3,4-oxadiazole, 2-trichloromethyl-5- Halomethylthiazole compounds such as (p-methoxystyryl) -1,3,4-oxadiazole, 2,4-bis (trichloromethyl) -6-p-methoxystyryl-S-triazine, 2,4-bis ( Trichloromethyl) -6- (1-p-dimethylaminophenyl-1,3-butadienyl) -S-triazine, 2-trichloromethyl-4-amino-6-p-methoxy Styryl-S-triazine, 2- (naphth-1-yl) -4,6-bis-trichloromethyl-S-triazine, 2- (4-ethoxy-naphth-1-yl) -4,6-bis-trichloro Halomethyl-S-triazine compounds such as methyl-S-triazine, 2- (4-butoxy-naphth-1-yl) -4,6-bis-trichloromethyl-S-triazine, 2,2-dimethoxy-1, 2-diphenylethane-1-one, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropanone, 1,2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -Butanone-1,1-hydroxy-cyclohexyl-phenyl ketone, methyl benzoylbenzoate, 4-benzoyl-4'-methyldiphenyl sulfide, benzyl Tilketal, dimethylaminobenzoate, isoamyl p-dimethylaminobenzoate, 2-n-butoxyethyl-4-dimethylaminobenzoate, 4-benzoyl-methyldiphenyl sulfide, 1-hydroxy-cyclohexyl-phenyl ketone, 2-benzyl-2- (Dimethylamino) -1- [4- (4-morpholinyl) phenyl] -1-butanone, 2- (dimethylamino) -2-[(4-methylphenyl) methyl] -1- [4- (4 -Morpholinyl) phenyl] -1-butanone, α-dimethoxy-α-phenylacetophenone, phenylbis (2,4,6-trimethylbenzoyl) phosphine oxide, 2-methyl-1- [4- (methylthio) phenyl]- 2- (4-Morpholinyl) -1-propanone, 1,2-octa One, and the like.

Examples of the oxime ester compound include 1,2-octadion-1- [4- (phenylthio)-, 2- (o-benzoyloxime)], ethanone, 1- [9-ethyl-6- (2-methylbenzoyl). -9H-carbazol-3-yl]-, 1- (o-acetyloxime), JP 2000-80068, JP 2001-233842, JP 2010-527339, JP 2010-527338, JP It can select suitably from the compounds as described in 2013-041153 grade | etc.,.
Examples of commercially available oxime ester compounds include Irgacure OXE-01, Irgacure OXE-02, Irgacure OXE-03 (manufactured by BASF), ADEKA OPT-N-1919, Adeka Arcles NCI-930, Adeka Arc. Ruse NCI-831 (above, manufactured by ADEKA), TR-PBG-304, TR-PBG-326, TR-PBG-345, TR-PBG-3057 (above, made by Changzhou Power Electronics New Materials Co., Ltd.) Can do.

  Specific examples of the compound having a tertiary amine structure include 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one (for example, Irgacure 907, manufactured by BASF), 2-benzyl. 2- (Dimethylamino) -1- (4-morpholinophenyl) -1-butanone (for example, Irgacure 369, manufactured by BASF), 4,4′-bis (diethylamino) benzophenone (for example, High Cure ABP, manufactured by Kawaguchi Pharmaceutical) And the like.

  As the photopolymerization initiator, in particular, a compound having a tertiary amine structure and an oxime ester compound may be used alone or in combination from the viewpoint of easy formation of a white colored layer having a high definition pattern. preferable.

The content of the photopolymerization initiator is not particularly limited as long as it can form a white colored layer having a desired hardness, but is 0.1% by mass to 9.0% by mass in the total solid content. %, Preferably 0.1% to 6.0% by weight, particularly 0.5% to 4.0% by weight. Preferably there is.
In recent years, there has been a demand for higher resolution of display devices such as liquid crystal display devices and organic electroluminescence (hereinafter sometimes simply referred to as organic EL) display devices. More specifically, the resolution is required to be twice (4K) or four times (8K) the number of horizontal and vertical pixels compared to the current HDTV (number of pixels horizontal 1920 × vertical 1080). For this reason, the white colored layer formed using the white colored composition of the present invention is also required to be able to be formed into a high-definition pattern shape.
On the other hand, it is because the white coloring composition of this invention can form a high-definition white colored layer because the said content is in the above-mentioned range. More specifically, since the white coloring composition has a low pigment concentration and absorbs little light during exposure by a pigment or the like, the photopolymerization initiator efficiently absorbs light during exposure and starts a curing reaction. be able to. For this reason, it can suppress that the hardening reaction by the said photoinitiator advances too much because the said content exists in the said range. Therefore, the white coloring composition can form a white layer having a desired pattern shape.

(2) Photosensitizer The photosensitizer is not particularly limited as long as it can be used together with the photopolymerization initiator to adjust the curing reaction of the white colored composition. The photosensitizer generally used with a polymerization initiator can be used.

As the photosensitizer, for example, a thioxan compound, a monofunctional thiol compound, and a polyfunctional thiol compound are preferable, and among them, a thioxan compound is preferable. This is because the curing reaction of the white colored composition can be controlled with higher accuracy.
These may be used individually by 1 type and may use 2 or more types together.

  Examples of monofunctional thiol compounds include 2-mercaptobenzothiazole, 2-mercaptobenzimidazole, 2-mercaptobenzoxazole, 2-mercaptomethylbenzimidazole, 2-mercaptomethylbenzoxazole, 2-mercaptomethylbenzothiazole and the like. Among them, the monofunctional thiol compound is preferably 2-mercaptomethylbenzothiazole from the viewpoint of chain transfer of radicals generated by the photopolymerization initiator and improving curability.

  The polyfunctional thiol compound is not particularly limited, and various compounds can be used. Polyfunctional thiol compounds are, 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-mercaptopropiate) Sulfonate), dipentaerythritol hexa (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. Polyfunctional thiol compounds include 2,5-hexanedithiol, 2,9-decanedithiol, 1,4-bis (1-mercaptoethyl) benzene, phthalic acid di (1-mercaptoethyl ester), phthalic acid di ( 2-mercaptopropyl ester), phthalic acid di (3-mercaptobutyl ester), phthalic acid di (3-mercaptoisobutyl ester) and the like having a substituent at a carbon atom at the α-position and / or β-position Polyfunctional thiol compounds; ethylene glycol bis (3-mercaptobutyrate), propylene glycol bis (3-mercaptobutyrate), diethylene glycol bis (3-mercaptobutyrate), butanediol bis (3-mercaptobutyrate), octanediol Bis (3-mercaptobutyrate), trimethylo Propanetris (3-mercaptobutyrate), pentaerythritol tetrakis (3-mercaptobutyrate), dipentaerythritol hexakis (3-mercaptobutyrate), ethylene glycol bis (2-mercaptopropionate), propylene glycol Bis (2-mercaptopropionate), 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) Rate), trimethylolpropane tris (3-mercaptoisobutyrate), pentaerythritol tetrakis (3-mercaptoisobutyrate), dipentaerythritol hexakis (3-mercaptoisobutyrate), ethylene glycol bis (2-mercaptoiso) Butyrate), propylene glycol bis (2-mercaptoisobutyrate), diethylene glycol bis (2-mercaptoisobutyrate), butanediol bis (2-mercaptoisobutyrate) Octanediol bis (2-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-me Lucaptovalerate), ethylene glycol bis (3-mercaptovalerate), propylene glycol bis (3-mercaptovalerate), diethylene glycol bis (3-mercaptovalerate), butanediol bis (3-mercaptovalerate), octane Examples thereof include diol bis (3-mercaptovalerate), trimethylolpropane tris (3-mercaptovalerate), pentaerythritol tetrakis (3-mercaptovalerate), dipentaerythritol hexakis (3-mercaptovalerate), and the like.
In the present invention, it is particularly preferable that the polyfunctional thiol compound is pentaerythritol tetrakis (3-mercaptobutyrate).

Examples of thioxan compounds include xanthone, 2,4-diethylthioxanthone and isopropylthioxanthone.
In the present invention, among these, the thioxan compound is preferably 2,4-diethylthioxanthone from the viewpoint of chain transfer of radicals generated by the photopolymerization initiator and improving curability.

  Examples of the combination of the photosensitizer with the photopolymerization initiator include, for example, a combination of a compound having a tertiary amine structure as the photopolymerization initiator and a thioxan compound as the photosensitizer, and a tertiary as the photopolymerization initiator. A combination of a compound having an amine structure and an oxime ester compound and a thioxan compound as a photosensitizer can be preferably used. This is because the curing reaction by the photoinitiator can be controlled with higher accuracy.

  The content of the photosensitizer in the total solid content is not particularly limited as long as a white colored layer having a desired hardness can be formed, but is 4.0% by mass in the total solid content. In particular, it is preferably in the range of 0.02% by mass to 3.0% by mass, and more preferably in the range of 0.04% by mass to 2.0% by mass. . When the content is within the above-described range, the white colored composition can form a white layer having a desired pattern shape.

(3) Photoinitiator The content of the photoinitiator in the total solid content is not particularly limited as long as a white colored layer having a desired hardness can be formed. It is in the range of 0.1% by mass to 9.0% by mass, more preferably in the range of 0.5% by mass to 6.0% by mass. When the content is within the above-described range, the white colored composition can form a white layer having a desired pattern shape.

4). Alkali-soluble resin The alkali-soluble resin used in the present invention has an acid group, acts as a binder resin, and is preferably used in a developer used for pattern formation, particularly preferably soluble in an alkali developer. Can be selected and used as appropriate.
A preferable alkali-soluble resin in the present invention is a resin having a carboxy group as an acidic group, and specific examples thereof include an acrylic copolymer having a carboxy group and an epoxy (meth) acrylate resin having a carboxy group. Among these, particularly preferable alkali-soluble resins are those having a carboxy group in the side chain and further having a photopolymerizable functional group such as an ethylenically unsaturated group in the side chain. This is because the film strength of the cured film formed by containing the photopolymerizable functional group is improved. These acrylic copolymers and epoxy acrylate resins may be used as a mixture of two or more.

  The acrylic copolymer having a carboxy group is obtained by copolymerizing a carboxy group-containing ethylenically unsaturated monomer and another ethylenically unsaturated monomer.

  Specific examples of the acrylic copolymer having a carboxy group include those described in JP 2013-029832 A, specifically, methyl (meth) acrylate, ethyl (meth) acrylate. Examples thereof include a copolymer composed of a monomer having no carboxy group such as one or more selected from (meth) acrylic acid and its anhydride. The acrylic copolymer is a polymer in which an ethylenically unsaturated bond is introduced by adding an ethylenically unsaturated compound having a reactive functional group such as a glycidyl group or a hydroxyl group to the above copolymer. However, the present invention is not limited to these examples.

  The copolymerization ratio of the carboxy group-containing ethylenically unsaturated monomer in the acrylic copolymer having a carboxy group is usually within the range of 5% by mass to 50% by mass, preferably within the range of 10% by mass to 40% by mass. is there. In this case, when the copolymerization ratio of the carboxy group-containing ethylenically unsaturated monomer is less than 5% by mass, the solubility of the resulting coating film in an alkaline developer is lowered, and pattern formation becomes difficult. On the other hand, if the copolymerization ratio exceeds 50% by mass, there is a tendency that pattern chipping or film roughness on the pattern surface tends to occur during development with an alkali developer.

The weight average molecular weight (Mw) of the acrylic copolymer having a carboxy group is preferably in the range of 1000 to 50000, more preferably 3000 to 20000. If it is less than 1000, the binder function after curing may be remarkably lowered. If it exceeds 50000, pattern formation may be difficult during development with an alkaline developer.
In addition, the said weight average molecular weight (Mw) of the acryl-type copolymer which has a carboxy group can be measured by a Shodex GPC system-21H (polystyrene) as a standard substance and THF as an eluent. it can.

Although it does not specifically limit as an epoxy (meth) acrylate resin which has a carboxy group, Epoxy (meth) obtained by making the reaction product of an epoxy compound and unsaturated group containing monocarboxylic acid react with an acid anhydride. Acrylate compounds are suitable.
The epoxy compound, unsaturated group-containing monocarboxylic acid, and acid anhydride can be appropriately selected from known ones. The epoxy (meth) acrylate resin having a carboxy group may be used alone or in combination of two or more.

The said alkali-soluble resin may be used individually by 1 type, and may be used in combination of 2 or more type.
As content of the said alkali-soluble resin, what is necessary is just what can form the white colored layer of a desired pattern shape, It exists in the range of 5 mass%-60 mass% in total solid, More preferably, it is 10 mass% It is in the range of ˜40% by mass. If the content of the alkali-soluble resin is less than the above lower limit, sufficient alkali developability may not be obtained, and if the content of the alkali-soluble resin is more than the above upper limit, the film may be rough during development. Pattern chipping may occur.

5). Polyfunctional monomer The polyfunctional monomer used in the present invention is not particularly limited as long as it can be polymerized by the photoinitiator. Usually, a compound having two or more ethylenically unsaturated double bonds is used. A polyfunctional (meth) acrylate having two or more acryloyl groups or methacryloyl groups is preferred.
Such polyfunctional (meth) acrylate may be appropriately selected from conventionally known ones. Specific examples thereof include those described in JP2013-029832A.

These polyfunctional (meth) acrylates may be used individually by 1 type, and may be used in combination of 2 or more type. In addition, when the light-curing property (high sensitivity) is required for the white coloring composition of the present invention, the polyfunctional monomer has three (trifunctional) or more polymerizable double bonds. Of these, poly (meth) acrylates of trihydric or higher polyhydric alcohols and their modified dicarboxylic acids are preferred. Specific examples of the polyfunctional (meth) acrylate include trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, succinic acid modified product of pentaerythritol tri (meth) acrylate, and pentaerythritol tetra (meth). Preferred are acrylate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, succinic acid modified product of dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate and the like.
As a commercial item of the said polyfunctional (meth) acrylate, the brand name Aronix M-403 (made by Toagosei Co., Ltd.) containing dipentaerythritol hexa (meth) acrylate, dipentaerythritol hexa (meta) is specifically mentioned. ) A trade name TO-2371 (manufactured by Toagosei Co., Ltd.) containing a modified succinic acid of acrylate can be mentioned.

  Although there is no restriction | limiting in particular in content of the said polyfunctional monomer, In the total solid of the said white coloring composition, it exists in the range of 5 mass%-60 mass%, More preferably, it is the range of 10 mass%-40 mass%. Is within. If the polyfunctional monomer content is less than the above lower limit, photocuring will not proceed sufficiently, and the exposed part may be eluted during development, and if the polyfunctional monomer content is greater than the above upper limit, alkali developability May decrease.

6). Solvent The solvent in the present invention may be any solvent that can stably disperse each component added as a solid content.

Such a solvent is not particularly limited as long as it is an organic solvent that does not react with each component of the white coloring composition and can dissolve or disperse them. A solvent can be used individually or in combination of 2 or more types.
Specific examples of the solvent include alcohol solvents such as methyl alcohol, ethyl alcohol, N-propyl alcohol, i-propyl alcohol, methoxy alcohol, and ethoxy alcohol; carbitol solvents such as methoxyethoxyethanol and ethoxyethoxyethanol; Ethyl acetate, butyl acetate, methyl methoxypropionate, ethyl methoxypropionate, ethyl ethoxypropionate, ethyl lactate, methyl hydroxypropionate, ethyl hydroxypropionate, n-butyl acetate, isobutyl acetate, isobutyl butyrate, n-butyl butyrate, Ester solvents such as ethyl lactate and cyclohexanol acetate; acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, 2-heptanone, etc. Tone solvents; glycol ether acetate solvents such as methoxyethyl acetate, propylene glycol monomethyl ether acetate, 3-methoxy-3-methyl-1-butyl acetate, 3-methoxybutyl acetate, ethoxyethyl acetate; methoxyethoxyethyl acetate, ethoxy Carbitol acetate solvents such as ethoxyethyl acetate and butyl carbitol acetate (BCA); diacetates such as propylene glycol diacetate and 1,3-butylene glycol diacetate; ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene Glycol dimethyl ether, diethylene glycol dimethyl ether, diethylene glycol monoethyl ether, diethylene Glycol ether solvents such as glycol diethyl ether, propylene glycol monomethyl ether and dipropylene glycol dimethyl ether; aprotic amide solvents such as N, N-dimethylformamide, N, N-dimethylacetamide and N-methylpyrrolidone; γ-butyrolactone, etc. Lactone solvents; cyclic ether solvents such as tetrahydrofuran; unsaturated hydrocarbon solvents such as benzene, toluene, xylene, and naphthalene; saturated hydrocarbon solvents such as N-heptane, N-hexane, and N-octane; Examples thereof include organic solvents such as aromatic hydrocarbons such as xylene. Among these solvents, glycol ether acetate solvents, carbitol acetate solvents, glycol ether solvents, and ester solvents are preferably used from the viewpoint of solubility of other components. Among them, as the solvent used in the present invention, propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether, butyl carbitol acetate (BCA), 3-methoxy-3-methyl-1-butyl acetate, ethyl ethoxypropionate, ethyl lactate, And it is 1 or more types selected from the group which consists of 3-methoxybutyl acetate from the point of the solubility of another component, and the applicability | paintability.

  The content of the solvent is not particularly limited as long as it can form a white colored composition having a desired coating property. In particular, it is preferably in the range of 65% by mass to 93% by mass, and particularly preferably in the range of 70% by mass to 91% by mass. If the amount of the solvent is too small, the white colored composition may increase in viscosity and be difficult to apply uniformly. Moreover, when there are too many solvents, a white coloring composition may fall and a uniform application | coating may be difficult.

7). Other components The white coloring composition of this invention may contain various additives as needed.
Examples of the additive include an antioxidant, a polymerization terminator, a chain transfer agent, a leveling agent, a plasticizer, a surfactant, an antifoaming agent, a silane coupling agent, an ultraviolet absorber, and an adhesion promoter. Can be mentioned.

8). Production Method The production method of the white colored composition of the present invention may be any method as long as it can obtain a white colored composition in which a pigment is stably dispersed, and is generally used as a production method of a colored composition for a color filter. The method can be used.
Examples of the production method include a step of preparing a dispersant, a step of dispersing a pigment in a solvent in the presence of the dispersant to form a pigment dispersion, an alkali-soluble resin, And a step of adding a functional monomer, an initiator, and other components, and mixing them using a known mixing means, to obtain a white colored composition.

9. Others The use of the white coloring composition for a color filter of the present invention may be any use for a white colored layer of a color filter. For example, a color filter used for various display devices such as a liquid crystal display device and an organic EL display device. Can be mentioned.

The chromaticity coordinates of the cured film formed with the white colored composition are usually adjusted according to the application of the white colored composition. Further, the chromaticity coordinates of the cured film can be adjusted mainly by the pigment composition of the pigment.
For example, when the white coloring composition is for a liquid crystal display device, the pigment has a chromaticity coordinate of 0.25 ≦ x ≦ 0 in the XYZ color system of JIS Z8701 measured using a C light source. And a pigment composition capable of forming a cured film satisfying 0.25 ≦ y ≦ 0.39, in particular 0.27 ≦ x ≦ 0.33, and A pigment composition capable of forming a cured film satisfying 28 ≦ y ≦ 0.34 is preferable.
Moreover, when the said white coloring composition is for liquid crystal display devices, it is preferable that x and y of the chromaticity coordinate of the cured film formed with the said white coloring composition have a relationship of x <= y. .
This is because the white color composition is more suitable for the formation of the white color layer of the color filter used in the liquid crystal display device due to the chromaticity coordinates.

  As a light source of a liquid crystal display device used together with a color filter formed using the above white coloring composition, for example, a blue light emitting element, a green phosphor and a red phosphor as described in JP-A-2015-094903 And a light emitting device including a blue light emitting element and a yellow YAG phosphor.

  When the white coloring composition is for an organic electroluminescence display device, the pigment has a chromaticity coordinate in the XYZ color system of JIS Z8701 measured by using a C light source, 0.27 ≦ x ≦ It is preferably a pigment composition capable of forming a cured film satisfying 0.36 and 0.25 ≦ y ≦ 0.32, in particular 0.28 ≦ x ≦ 0.33, and A pigment composition capable of forming a cured film satisfying 0.26 ≦ y ≦ 0.31 is preferable. This is because the white colored composition is more suitable for the formation of the white colored layer of the color filter used in the organic EL display device by being the chromaticity coordinates.

  As a light source of an organic EL display device used together with a color filter formed using the above white coloring composition, a light source generally used for an organic EL display device can be used.

B. Next, a method for producing a color filter of the present invention will be described.
The manufacturing method of the color filter of this invention has a white colored layer formation process which forms a white colored layer using the above-mentioned white colored composition for color filters.

A method for producing such a color filter of the present invention will be described with reference to the drawings.
FIG. 1 is a process diagram showing an example of a method for producing a color filter of the present invention. As illustrated in FIG. 1, in the method for producing a color filter of the present invention, a light shielding portion 2 having an opening is formed on one surface of a transparent substrate 1 (FIG. 1A), and then the above white coloring A coating film of the white colored composition is formed by applying the composition on one surface of the transparent substrate 1, and a white colored 3W is formed by exposing and developing the coating film through a mask. Then, the color filter 10 is formed by forming the colored layers (3R, 3G, 3B) of red, green, and blue (FIG. 1 (c)).
1A shows a light shielding part forming step, FIG. 1B shows a white colored layer forming step, and FIG. 1C shows a colored colored layer forming step.

  According to the present invention, it is possible to obtain a color filter with high luminance and little pixel unevenness by including a white colored layer forming step of forming a white colored layer using the above-described white colored composition.

The manufacturing method of the color filter of this invention has a white colored layer formation process.
Hereinafter, each process of the manufacturing method of the color filter of this invention is demonstrated.

1. White colored layer formation process The white colored layer formation process in this invention is a process of forming a white colored layer using the above-mentioned white colored composition for color filters.
In addition, about the white coloring composition used for this process, since it can be made to be the same as that of the content as described in the above-mentioned item of "A. White coloring composition for color filters", description here is abbreviate | omitted.

In this step, the method for forming the white colored layer is not particularly limited as long as the white colored layer having a desired pattern and thickness can be formed. Can be used.
The above-mentioned forming method is, for example, by applying the white colored composition on one surface of the transparent substrate to form a coating film of the white colored composition, and by exposing the coated film through a mask, The white coloring formed using the cured product of the white coloring composition by having an exposure step of curing the coating film in a pattern and a developing step of removing uncured portions of the coating film by development. A method of forming a layer can be mentioned.

Examples of the method for applying the white coloring composition include spray coating, dip coating, bar coating, roll coating, spin coating, and die coating.
Examples of the light source used for the exposure of the coating film include ultraviolet rays and electron beams such as a low pressure mercury lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, and a metal halide lamp. The exposure amount is appropriately adjusted depending on the light source used, the thickness of the coating film, and the like.
The forming method may be a drying process for removing the solvent before the coating film is exposed.
Moreover, the said formation method may perform heat processing, in order to accelerate | stimulate a polymerization reaction before and behind exposure. The heating conditions are appropriately selected depending on the blending ratio of each component in the white coloring composition to be used, the thickness of the coating film, and the like.
As the developer used for development, a solution in which an alkali is dissolved in water or a water-soluble solvent is usually used. An appropriate amount of a surfactant or the like may be added to the alkaline solution. Further, a general method can be adopted as the developing method.
After the development treatment, usually, the developer is washed and the cured coating film of the white colored composition is dried to form a white colored layer. In addition, you may heat-process in order to fully harden a coating film after image development processing. The heating conditions are not particularly limited and are appropriately selected depending on the application of the coating film.

The arrangement of the white colored layers formed in this step 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.
The width, area, etc. of the white colored layer can be arbitrarily set.
The thickness of the white colored layer is appropriately controlled by adjusting the coating method, the solid content concentration, the viscosity, and the like of the white colored composition, but it is usually preferably in the range of 1 μm to 5 μm.
As the transparent substrate on which the white colored layer is formed, those generally used for color filters can be used, and thus description thereof is omitted here.

2. Other Steps The method for producing a color filter of the present invention includes the white colored layer forming step. Usually, the red colored layer is formed on the surface of the transparent substrate on the same plane as the white colored layer. And a step of forming a colored layer including a green coloring layer and a blue coloring layer, and a step of forming a light shielding portion formed on the surface of the transparent substrate and having an opening.
Note that each of these steps can be the same as a step in a general color filter manufacturing method, and thus description thereof is omitted here.

C. Next, a method for manufacturing a display device according to the present invention will be described.
The manufacturing method of the display apparatus of this invention has a color filter formation process which forms the color filter which has a white colored layer using the above-mentioned white coloring composition.

A method for manufacturing such a display device of the present invention will be described with reference to the drawings.
FIG. 2 is a process diagram showing an example of a method for manufacturing a display device of the present invention, and shows an example in which the display device is a liquid crystal display device.
As illustrated in FIG. 2, the method for manufacturing a display device of the present invention forms the coating film of the white colored composition by applying the white colored composition on one surface of the color filter forming substrate. Then, by exposing and developing the coating film through a mask, a white colored 3W is formed, and then a colored colored layer (3R, 3G, 3B) of red, green and blue is formed. The filter 10 is formed (FIG. 2A), then the color filter 10, the counter substrate 21 having a TFT array substrate and the like, and the liquid crystal layer 22 formed between the color filter 10 and the counter substrate 21 are formed. And a backlight 23 disposed on the opposite side of the counter substrate from the liquid crystal layer (FIG. 2B), thereby manufacturing the liquid crystal display device 20 (FIG. 2C). .
2A is a color filter forming process, and FIGS. 2B and 2C are bonding processes.
In addition, the liquid crystal display device manufactured by the manufacturing method of the present invention is not limited to the configuration shown in FIG. 2, and generally has a configuration known as a liquid crystal display device using a color filter. Can do.

FIG. 3 is a process diagram showing an example of the method for manufacturing a display device of the present invention, and shows an example in which the display device is an organic EL display device.
As illustrated in FIG. 3, in the method for manufacturing a display device of the present invention, the white colored composition is coated on one surface of the color filter forming substrate to form a coating film of the white colored composition. By performing exposure and development of the coating film through a mask, a white colored 3W is formed, and then a colored colored layer (3R, 3G, 3B) of red, green and blue is formed, thereby forming a color filter 10 is formed (FIG. 3A), and then the organic EL display device 30 is manufactured by bonding the color filter 10 and the organic light emitting body 31 together.
3A shows the color filter forming process, and FIGS. 3B and 3C show the bonding process.
In this example, in the bonding step, the organic protective layer 32 and the inorganic oxide film 33 are also bonded to the color filter.
Note that the organic EL display device manufactured by the manufacturing method of the present invention is not limited to the configuration shown in FIG. 3, and is generally known as an organic EL display device using a color filter. can do.

  According to the present invention, by having a color filter forming step of forming a color filter having a white colored layer formed using the above-described white colored composition, a display device with high brightness and little display unevenness is obtained. Can do.

The display device manufacturing method of the present invention includes a color filter forming step.
Hereafter, each process of the manufacturing method of the display apparatus of this invention is demonstrated.
The color filter forming step in the present invention can be the same as the content described in the above section “B. Color filter manufacturing method”, and thus the description thereof is omitted here.

The method for manufacturing a display device of the present invention includes the above color filter forming step, but usually includes other steps.
As other processes, a bonding process in which the color filter is bonded to other structures of the display device can be given.
Examples of the method for bonding the color filter and other components in the bonding step include a method of bonding via an adhesive or the like.
As the other configuration, for example, when the display device is a liquid crystal display device, a counter substrate having a TFT array substrate or the like, a liquid crystal layer formed between the color filter and the counter substrate, a backlight Etc.
The counter substrate can be appropriately selected and used depending on the driving method of the liquid crystal display device.
The driving method is not particularly limited, and a driving method generally used for a liquid crystal display device can be employed. Examples of such a drive method include a TN method, an IPS method, an OCB method, and an MVA method. In the present invention, any of these methods can be preferably used.
As the liquid crystal constituting the liquid crystal layer, various liquid crystals having different dielectric anisotropy and mixtures thereof can be used according to the driving method of the liquid crystal display device.
As the backlight, those generally used in liquid crystal display devices can be used. The backlight can be the same as the light source of the liquid crystal display device described in “9. Others” of “A. White coloring composition for color filter”.

As said other structure, when the said display apparatus is an organic electroluminescent display apparatus, an organic light-emitting body, an organic protective layer, an inorganic oxide film, etc. can be mentioned, for example.
As said organic light-emitting body, what is generally used for the organic electroluminescent display apparatus can be used.
As the layer structure of the organic light emitter, for example, as shown in FIG. 3 described above, the transparent anode 41, the hole injection layer 42, the hole transport layer 43, the light emitting layer 44, and the electrons are formed on the upper surface of the color filter 10. The injection layer 45 and the cathode 46 may be sequentially formed. In addition, a well-known thing can be used suitably for a transparent anode, a positive hole injection layer, a positive hole transport layer, a light emitting layer, an electron injection layer, a cathode, and another structure in an organic light-emitting body.
The organic EL display device can be applied to, for example, a passive drive type organic EL display or an active drive type organic EL display.

D. Next, the color filter of the present invention will be described.
The color filter of this invention has a white colored layer formed using the hardened | cured material of the above-mentioned white coloring composition for color filters.

  Such a color filter of the present invention can be the same as the content described in FIG.

  According to the present invention, by having the white colored layer formed using the cured product of the above-described white colored composition, the color filter has high luminance and little pixel unevenness.

The color filter of the present invention includes a white colored layer.
In addition, about the white coloring composition and white coloring layer in this invention, since it can be made to be the same as that of the content as described in the item of the said "B. manufacturing method of a color filter", description here is abbreviate | omitted.
Other configurations of the color filter of the present invention can be the same as the contents described in the section “B. Manufacturing method of color filter” above, and thus the description thereof is omitted here.
The method for producing the color filter of the present invention may be any method as long as it can accurately form a white colored layer having a desired pattern shape. For example, the production method described in the above section “B. Method for producing color filter” is used. Can be used.

E. Display Device Next, the display device of the present invention will be described.
A display device according to the present invention includes the above-described color filter.

  Examples of the display device of the present invention include the already described FIG. 2 (c) and FIG. 3 (c).

  According to the present invention, by having the color filter described above, the display device has high brightness and little display unevenness.

The display device of the present invention has a color filter.
The color filter in the present invention can be the same as the contents described in the above section “D. Color filter”, and thus the description thereof is omitted here.
Other configurations other than the color filter in the display device of the present invention are appropriately selected depending on the type of the display device, and specifically described in the above-mentioned section “C. Manufacturing method of display device”. Since it can be the same as that of the contents, description here is omitted.
The method for producing a display device of the present invention is not particularly limited as long as it is a method capable of producing a display device having the above-described color filter. For example, it is described in the above section “C. Method for producing display device”. The manufacturing method can be used.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.

  The following examples illustrate the present invention more specifically.

[Synthesis Example 1: Synthesis of Dispersant A and Dispersant A-2]
Add 250 parts by mass of tetrahydrofuran (THF) and 0.6 parts by mass of lithium chloride to a 500 mL round bottom 4-neck separable flask equipped with a condenser, addition funnel, nitrogen inlet, mechanical stirrer, and digital thermometer. Nitrogen replacement was performed. After cooling the reaction flask to −60 ° C., 4.9 parts by mass of butyllithium (15% by mass hexane solution) and 1.1 parts by mass of diisopropylamine were injected using a syringe. B segment monomer 1-ethoxyethyl methacrylate (EEMA) 2.2 parts by mass, 2-hydroxyethyl methacrylate (HEMA) 18.7 parts by mass, 2-ethylhexyl methacrylate (EHMA) 12.8 parts by mass, n-butyl methacrylate (BMA) 13.7 parts by mass, benzyl methacrylate (BzMA) 9.5 parts by mass, and methyl methacrylate (MMA) 17.5 parts by mass were added dropwise over 60 minutes using an addition funnel. 26.7 parts by mass of dimethylaminoethyl methacrylate (DMMA) as a monomer for the A segment was added dropwise over 20 minutes. After reacting for 2 hours, 1.5 parts by mass of methanol was added to stop the reaction. The obtained precursor block copolymer THF solution was reprecipitated in hexane, purified by filtration and vacuum drying, diluted with PGMEA to obtain a solid content solution of 30% by mass. 32.5 parts by mass of water was added, the temperature was raised to 100 ° C., and the mixture was reacted for 1 hour to deprotect the structural unit derived from EEMA to obtain a structural unit derived from methacrylic acid (MAA). The obtained block copolymer PGMEA solution is reprecipitated in hexane, purified by filtration and vacuum drying, and is composed of an A segment containing the structural unit represented by the general formula (I) and a carboxy group-containing monomer-derived structural unit. A block copolymer a-1 (dispersant A, acid value 8 mgKOH / g) containing a B segment having a solvophilic property was obtained. The block copolymer a-1 thus obtained was confirmed by GPC (gel permeation chromatography). The weight average molecular weight Mw was 7730. The amine value was 95 mgKOH / g.
In a 100 mL round bottom flask, 10.00 parts by mass of block copolymer a-1 was dissolved in 42.15 parts by mass of PGMEA, and phenylphosphonic acid (manufactured by Tokyo Chemical Industry Co., Ltd.), which is a compound represented by the above general formula (3). Add 0.54 parts by mass (the compound represented by the general formula (3) is 0.20 mol per 1 mol of the DMMA unit of the block copolymer a-1) and stir at a reaction temperature of 30 ° C. for 20 hours. Thus, a salt type block copolymer A-2 (dispersant A-2) solution having a solid content of 20% by mass was obtained. Although the acid value of the block copolymer after salt formation is the same as that of the block copolymer a-1 before salt formation, the amine value after salt formation was specifically calculated as follows.
1 g of a solution in which 9 parts by mass of salt-type block copolymer A-2 (solid matter after reprecipitation) and 91 parts by mass of chloroform-D1 NMR were mixed in an NMR sample tube, and the 13C-NMR spectrum was subjected to nuclear magnetic resonance. Using an apparatus (manufactured by JEOL Ltd., FT NMR, JNM-AL400), the measurement was performed under conditions of room temperature and 10,000 times of integration. Of the obtained spectral data, the integrated value of the carbon atom peak adjacent to the non-salt-formed nitrogen atom and the carbon atom peak adjacent to the salt-formed nitrogen atom at the terminal nitrogen site (amino group) From the ratio, the ratio of the number of amino groups that are salt-formed to the total number of amino groups is calculated, and is not different from the theoretical salt-forming ratio (the two acidic groups of all phenylphosphonic acids are in DMMA of the block copolymer a-1). It was confirmed that a salt was formed with the terminal nitrogen site).
The amine value after salt formation was calculated to be 57 mgKOH / g by subtracting the amine value (38 mgKOH / g) of 0.40 mol of DMMA unit from the amine value of 95 mgKOH / g before salt formation.

[Synthesis Examples 2 to 6: Synthesis of Dispersants B to F]
In the synthesis example 1, except having changed into the compound and content shown in Table 1, it carried out similarly to the synthesis example 1, and synthesize | combined the salt type block copolymer BF (dispersant BF) solution. In Synthesis Examples 2 and 5, 0.6 part by mass of EEMA is used, 4.8 parts by mass of EEMA is used in Synthesis Example 3, 0.9 part by mass of EEMA is used in Synthesis Example 4, and Synthesis Example 6 is used. Used 2.2 parts by mass of EEMA. Table 1 shows the acid value and amine value of the obtained salt-type block copolymer.
In Table 1, for each monomer, the amount of monomer charged is expressed in mass%, and for the salt-forming compound, the amount of salt-forming compound is set to DMMA or dimethylaminopropyl methacrylic monomer for A segment. It is shown in moles per mole of amide (DMAPMA).

[Synthesis Example 7: Synthesis of Dispersant G]
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 18.7 parts by mass of HEMA monomer for B segment, 12.8 parts by mass of EHMA, and 13.7 parts of BMA Part by mass, 9.5 parts by mass of BzMA, and 19.5 parts by mass of MMA were added dropwise using an addition funnel over 60 minutes. The temperature was kept below 40 ° C. by cooling the reaction flask with an ice bath. After 1 hour, 25.8 parts by mass of DMMA, which is a monomer for the A segment, 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 an A segment containing the structural unit represented by the general formula (I) and a B segment having solvophilicity The block copolymer a-7 containing was obtained. Thus, when obtained block copolymer a-7 was confirmed by GPC (gel permeation chromatography), the weight average molecular weight Mw was 7320. The amine value was 92 mgKOH / g.
10.00 parts by mass of block copolymer a-7 is dissolved in 42.25 parts by mass of PGMEA in a 100 mL round bottom flask, and benzyl bromide (manufactured by Tokyo Chemical Industry Co., Ltd.) 0, which is a compound represented by the above general formula (2). .56 parts by mass (the compound represented by the general formula (2) is 0.20 mol based on 1 mol of the DMMA unit of the block copolymer a-7) and stirred at a reaction temperature of 30 ° C. for 20 hours. A salt type block copolymer G (dispersant G) solution having a solid content of 20% by mass was obtained. The amine value after salt formation was measured based on the method described in JIS K 7237.

[Synthesis Example 8: Synthesis of Dispersant H]
(1) Preparation of Macromonomer A A reactor equipped with a cooling tube, an addition funnel, a nitrogen inlet, a mechanical stirrer, and a digital thermometer was charged with 80.0 parts by mass of PGMEA, and the temperature was stirred while stirring in a nitrogen stream. Warmed to 90 ° C.
MMA 50.0 parts by mass, BMA 30.0 parts by mass, BzMA 20.0 parts by mass, mercaptoethanol 4.0 parts by mass, PGMEA 30 parts by mass, α, α'-azobisisobutyronitrile A mixed solution of 1.0 part by mass of (AIBN) was added dropwise over 1.5 hours, and the reaction was further performed for 3 hours.
Next, the nitrogen stream was stopped, the reaction solution was cooled to 80 ° C., and 8.74 parts by mass of 2-methacryloyloxyethyl isocyanate (Karenz MOI (manufactured by Showa Denko KK)), dibutyltin dilaurate was reduced to 0.8. 125 g, 0.125 parts by mass of p-methoxyphenol and 10 parts by mass of PGMEA were added and stirred for 3 hours to obtain a macromonomer A solution.
When the obtained macromonomer A was confirmed by GPC, the weight average molecular weight (Mw) was 4000.

(2) Synthesis of copolymer B using macromonomer A A reactor equipped with a cooling tube, an addition funnel, a nitrogen inlet, a mechanical stirrer, and a digital thermometer was charged with 80.0 parts by mass of PGMEA, and a nitrogen stream The mixture was heated to 85 ° C. with stirring.
146.04 parts by mass of macromonomer A solution obtained in the above (1) (solid content 48% by mass), 29.9 parts by mass of DMMA, 1.24 parts by mass of n-dodecyl mercaptan, 20.0 parts by mass of PGMEA, 0.5 AIBN After adding 1.5 parts by mass of the mixed solution mixed solution over 1.5 hours and heating and stirring for 3 hours, a mixed solution of 0.10 parts by mass of AIBN and 10.0 parts by mass of PGMEA was added dropwise over 10 minutes. By aging for 1 hour, a graft copolymer a-8 solution was obtained. The obtained graft copolymer a-8 solution is reprecipitated in hexane, purified by filtration and vacuum drying, and B having solvophilicity with the A segment containing the structural unit represented by the general formula (I). Graft copolymer a-8 containing a segment was obtained. The graft copolymer a-8 thus obtained was confirmed by GPC (gel permeation chromatography), and the weight average molecular weight Mw was 10,200. The amine value was 107 mgKOH / g.
In a 100 mL round bottom flask, 10.00 parts by mass of graft copolymer a-8 is dissolved in 42.40 parts by mass of PGMEA, and phenylphosphonic acid (produced by Tokyo Chemical Industry Co., Ltd.), which is a compound represented by the above general formula (3). Add 0.60 part by mass (the compound represented by the general formula (3) is 0.20 mol per 1 mol of the DMMA unit of the graft copolymer a-8) and stir at a reaction temperature of 30 ° C. for 20 hours. Thus, a salt type graft copolymer H (dispersant H) solution having a solid content of 20% by mass was obtained. The amine value after salt formation was calculated in the same manner as in Synthesis Example 1.

[Synthesis Example 9: Synthesis of alkali-soluble resin A solution]
After charging 300 parts by mass of PGMEA in a polymerization tank and raising the temperature to 100 ° C. in a nitrogen atmosphere, 90 parts by mass of 2-phenoxyethyl methacrylate (PhEMA), 54 parts by mass of MMA, 36 parts by mass of MAA, and perbutyl O (NOF CORPORATION) 6 parts by mass) and 2 parts by mass 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. By reacting, an alkali-soluble resin A solution (weight average molecular weight (Mw) 8500, acid value 75 mgKOH / g, solid content 40% by mass) was obtained.
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 Example 1: Production of colorant dispersion B1]
16.25 parts by mass of the dispersant A-2 solution of Synthesis Example 1 as a dispersant and C.I. I. Pigment Blue 15: 6 (PB15: 6) is 13.0 parts by mass, the alkali-soluble resin A solution obtained in Synthesis Example 9 is 16.25 parts by mass, PGMEA is 54.5 parts by mass, and the particle size is 2.0 mm zirconia. 100 parts by mass of beads are put into a mayonnaise bin, shaken for 1 hour with a paint shaker (manufactured by Asada Tekko Co., Ltd.) as a pre-crush, then take out zirconia beads having a particle size of 2.0 mm, and zirconia having a particle size of 0.1 mm 200 parts by mass of beads were added, and similarly, this dispersion was dispersed for 4 hours with a paint shaker to obtain a colorant dispersion B1.

[Production Example 2: Production of color material dispersions B2 to B6, V1 to V3, G1 to G10, R1 to R2, and Y1]
As shown in Tables 2 and 3, each pigment type in place of PB15: 6, and the dispersants A to H solutions of Synthesis Examples 1 to 8 and BYK-2000 in solid content instead of the dispersant A-2 solution Used in the same manner as the dispersant A-2 solution, and the amount of PGMEA was adjusted so that the total amount would be 100 parts by mass, in the same manner as in Production Example 1, coloring material dispersions B2 to B6, V-1 to V3, G1 to G10, R1 to R2, and Y1 were obtained.
The amine value of the dispersant BYK-2000 was 16 mgKOH / g.

[Production Example 3: Production of photosensitive composition A]
194.60 parts by mass of the alkali-soluble resin A solution obtained in Synthesis Example 9, 116.76 parts by mass of a polyfunctional monomer (trade name Aronix M-403, manufactured by Toagosei Co., Ltd.), 2-methyl-1 4.05 parts by mass of 2- (4-methylthiophenyl) -2-morpholinopropan-1-one (photopolymerization initiator: trade name Irgacure 907, manufactured by BASF Japan Ltd.), 2,4-diethylthioxanthone (light Sensitizer: 1.35 parts by mass of trade name Kayacure DETX-S (manufactured by Nippon Kayaku Co., Ltd.) and 183.24 parts by mass of PGMEA were added to obtain photosensitive composition A.

[Production Example 4: Production of photosensitive composition B]
The alkali-soluble resin A solution obtained in Synthesis Example 9 is 39.40 parts by mass, the polyfunctional monomer (trade name Aronix M-403, manufactured by Toagosei Co., Ltd.) is 23.64 parts by mass, and has an oxime ester skeleton. 0.15 parts by mass of a photopolymerization initiator (trade name: Adeka Arcles NCI-831, ADEKA), 2-benzyl-2- (dimethylamino) -1- (4-morpholinophenyl) -1- 0.30 parts by mass of butanone (photopolymerization initiator: trade name Irgacure 369, manufactured by BASF Japan Ltd.), 2,4-diethylthioxanthone (photosensitizer: trade name Kayacure DETX-S, Nippon Kayaku Co., Ltd.) 0.15 parts by mass) and 39.36 parts by mass of PGMEA were added to obtain a photosensitive composition B.

[Example 1: Production of white coloring composition W1]
0.121 parts by mass of the colorant dispersion B1 obtained in Production Example 1, 0.121 parts by mass of the colorant dispersion G2 obtained in Production Example 2, and the photosensitive composition A obtained in Production Example 3. Was added in an amount of 22.36 parts by mass, 0.009 parts by mass of a fluorosurfactant (trade name: Megafac 559, manufactured by DIC Corporation), and 27.39 parts by mass of PGMEA to obtain a white colored composition W1 ( PB15: 6 / PG36 = 50/50, P / V = 0.0035, I = 2.68%).
In addition, I shows content of a photoinitiator, ie, the total content rate (mass%) in the total solid of a photoinitiator and a photosensitizer.

[Examples 2-18 and Comparative Examples 1-3: Production of White Colored Compositions W2-W18 and W20-W22]
In Example 1, instead of the color material dispersion liquid B1 and the color material dispersion liquid G2, the color material dispersion liquid was changed to have the color material dispersion liquid ratios shown in Table 4 and Table 5, respectively, and I, P / V Was adjusted in the same manner as in Example 1 except that the amount of the photosensitive composition A was adjusted so that the ratios shown in Tables 4 and 5 were adjusted, and the amount of PGMEA was adjusted so that the total amount was 50 parts by mass. Compositions W2-W18 and W20-W22 were obtained.

[Example 19: Production of white coloring composition W19]
0.131 parts by mass of the colorant dispersion B1 obtained in Production Example 1, 0.131 parts by mass of the colorant dispersion G2 obtained in Production Example 2, and the photosensitive composition B obtained in Production Example 4. Was added in an amount of 22.35 parts by mass, 0.009 parts by mass of a fluorosurfactant (trade name Megafac 559, manufactured by DIC Corporation) and 27.38 parts by mass of PGMEA to obtain a white colored composition W19 ( PB15: 6 / PG36 = 50/50, P / V = 0.039, I = 1.49%).
In addition, I shows content of a photoinitiator, ie, the total content rate (mass%) in the total solid of a photoinitiator and a photosensitizer.

[Comparative Example 4: Production of white colored composition W23]
8.73 parts by mass of the alkali-soluble resin A solution obtained in Synthesis Example 9 and 5.24 parts by mass of a polyfunctional monomer (trade name Aronix M-403, manufactured by Toagosei Co., Ltd.), 2-methyl-1 0.181 parts by mass of-(4-methylthiophenyl) -2-morpholinopropan-1-one (photoinitiator: trade name Irgacure 907, manufactured by BASF Japan Ltd.), 2,4-diethylthioxanthone (photosensitization) Sensitizer: 0.060 parts by mass of trade name Kayacure DETX-S, manufactured by Nippon Kayaku Co., Ltd. ) Was added in an amount of 0.009 parts by mass to obtain a white colored composition W23 (pigment-free, I = 2.68%).

[Evaluation]
1. Pixel unevenness Using a spin coater, the white colored compositions obtained in Examples and Comparative Examples were each formed on a glass substrate (NH Techno Glass Co., Ltd., “NA35”) having a thickness of 0.7 mm and a size of 100 mm × 100 mm. After the post-baking, coating was performed to form a colored layer having a thickness of 2.0 μm, followed by drying at 80 ° C. for 3 minutes using a hot plate to form a white colored layer. This white colored layer was irradiated with ultraviolet rays of 60 mJ / cm ² using an ultrahigh pressure mercury lamp. Next, the colored substrate was post-baked in a clean oven at 230 ° C. for 30 minutes. The number of bright spots (aggregates of pigment) within 1 mm × 1 mm was measured for the obtained substrate under an optical microscope under crossed Nicols, and evaluated according to the following evaluation criteria. The results are shown in Table 4 and Table 5 below.

(Pixel unevenness evaluation criteria)
A: The number of bright spots is less than 5.
B: The number of bright spots is 5 or more and less than 20.
C: The number of bright spots is 20 or more.
In addition, although the white colored composition whose evaluation result is B can suppress pixel nonuniformity sufficiently, if the evaluation result is A, the white colored composition will exhibit more excellent optical performance.

2. Billitsuki The white colored compositions obtained in Examples and Comparative Examples were each used on a glass substrate (NH Techno Glass Co., Ltd., “NA35”) having a thickness of 0.7 mm and a thickness of 100 mm using a spin coater. After the post-baking, a white colored layer was formed by coating at a film thickness to form a colored layer having a thickness of 2.0 μm and drying at 80 ° C. for 3 minutes using a hot plate. This white colored layer was irradiated with 60 mJ / cm ² of ultraviolet rays using an ultrahigh pressure mercury lamp through a striped photomask having a mask opening width of ² μm to 100 μm. The glass substrate on which the white colored layer was formed was shower-developed for 60 seconds using a 0.05% by mass aqueous potassium hydroxide solution as an alkaline developer. Next, the white colored substrate was post-baked in a clean oven at 230 ° C. for 30 minutes, and the obtained substrate was observed with an optical microscope for the shape of a stripe-type white colored layer with respect to a mask opening line width of 30 μm. And evaluated. The results are shown in Table 4 and Table 5 below.

(Evaluation criteria for billieck)
A: The difference between the shortest part and the longest part of the short side is less than 0.3 μm.
B: The difference between the shortest part and the longest part of the short side is 0.3 μm or more and less than 0.6.
C: The difference between the shortest part of the short side and the longest part is 0.6 μm or more.
Even if the evaluation result is B, the white colored composition can be used practically, but if the evaluation result is A, the white colored composition is suitable for higher definition.

3. Development residue The white colored compositions obtained in Examples and Comparative Examples were each used on a glass substrate (“NA35” manufactured by NH Techno Glass Co., Ltd.) having a thickness of 0.7 mm and a size of 100 mm × 100 mm using a spin coater. After the post-baking, coating was performed to form a colored layer having a thickness of 2.0 μm, followed by drying at 80 ° C. for 3 minutes using a hot plate to form a white colored layer. The glass substrate on which the white colored layer was formed was shower-developed for 60 seconds using a 0.05% by mass aqueous potassium hydroxide solution as an alkaline developer. The unexposed portion (50 mm × 50 mm) of the glass substrate after the formation of the white colored layer was visually observed, and then sufficiently wiped off with a lens cleaner containing ethanol (trade name Toraysee MK Clean Cloth). The degree of coloring of the lens cleaner was visually observed and evaluated according to the following evaluation criteria. The results are shown in Table 4 and Table 5 below.

(Development residue evaluation criteria)
A: Development residue was not visually confirmed, and the lens cleaner was not colored at all.
B: Development residue was not visually confirmed or slightly confirmed, and the color of the lens cleaner was slightly confirmed.
C: Development residue was visually confirmed and coloring of the lens cleaner was confirmed.
Even if the evaluation result is B, the white colored composition can be used practically, but if the evaluation result is A, the white colored composition can further increase the production yield.

4). Dispersion Stability For the colorant dispersions obtained in Production Examples 1 and 2, the viscosity was measured immediately after preparation and after storage for 30 days at 25 ° C., and the viscosity change rate was calculated from the viscosity before and after storage. Sex was evaluated. The viscosity was measured at 25.0 ± 0.5 ° C. using a vibration viscometer (model name: FVM80A-STC, manufactured by Seconic Co., Ltd.) and evaluated according to the following evaluation criteria. . The results are shown in Table 2 and Table 3 below.

(Dispersion stability evaluation criteria)
A: The rate of change in viscosity before and after storage is less than 15%.
B: The rate of change in viscosity before and after storage is 15% or more and less than 40%.
C: The rate of change in viscosity before and after storage is 40% or more.
In addition, the said color material dispersion liquid is a value when a pigment is 13 mass% with respect to the total mass including a solvent.
Even if the evaluation result is B, the color material dispersion can be used practically. However, if the evaluation result is A, the color material dispersion is excellent in dispersion stability.

5). Solvent re-dissolvability The tip of a glass substrate having a width of 50 mm and a length of 100 mm was immersed in the white coloring composition obtained in Examples and Comparative Examples and applied to a 10 mm length portion of the glass substrate. The pulled-up glass substrate was put into a constant temperature and humidity chamber so that the glass surface was horizontal, and dried at a temperature of 23 ° C. and a humidity of 80% RH for 30 minutes. Next, the glass substrate to which the dried coating film was adhered was immersed in PGMEA for 15 seconds. At this time, the redissolved state of the dried coating film was visually discriminated and evaluated according to the following evaluation criteria. The results are shown in Table 4 and Table 5 below.

(Solvent re-solubility evaluation criteria)
A: The dried coating film was completely dissolved.
B: Dried flakes were formed in PGMEA, and the solution was colored.
C: The dry coating flakes were formed in PGMEA, and the solution was not colored, or the dry coating flakes were not formed in PGMEA, and the solution was not colored.
In addition, if the solvent re-solubility evaluation standard is B, it is evaluated that the solvent re-solubility is good and can be used without any problem in practice, but if the evaluation result is A, the white colored composition should increase the production yield. Can do.

6). Chromaticity coordinates of the white colored composition The white colored compositions obtained in the examples and comparative examples are each 0.7 mm thick and 100 mm × 100 mm on a glass substrate (“NA35” manufactured by NH Techno Glass Co., Ltd.). Further, after coating with a film thickness that forms a 2.0 μm thick colored layer after post-baking using a spin coater, the white colored layer was formed by drying at 80 ° C. for 3 minutes using a hot plate. This white colored layer was irradiated with 60 mJ / cm ² ultraviolet rays using an ultrahigh pressure mercury lamp, and then shower developed for 60 seconds using a 0.05% by mass aqueous potassium hydroxide solution as an alkaline developer.
Next, the substrate on which the white colored layer is formed is post-baked in a clean oven at 230 ° C. for 30 minutes, and the chromaticity (x, y) and luminance (Y) of the obtained white colored layer substrate are determined by Olympus microscopic differential light. It measured using measuring apparatus OSP-SP200. The results are shown in Table 4 and Table 5 below.

7). Summary From Tables 1 to 5, it was confirmed that in the examples, a color filter with high luminance and little pixel unevenness could be manufactured.
It was also confirmed that a white colored layer having various chromaticity coordinates can be formed by changing the type of pigment.
On the other hand, in Comparative Examples 1-3, the result that the evaluation of pixel unevenness was low was obtained.
Further, in Comparative Example 4, there was a tendency that billiness was likely to occur. Furthermore, since the comparative example 4 does not contain a pigment, the chromaticity of the white pixel cannot be adjusted, and the white balance is adjusted within an appropriate range. Therefore, the colors of the red composition, the green composition, and the blue composition It was confirmed that the area and brightness were limited.

DESCRIPTION OF SYMBOLS 1 ... Transparent substrate 2 ... Light-shielding part 3 ... White colored layer 3R ... Red colored layer 3G ... Green colored layer 3B ... Blue colored layer 10 ... Color filter 20 ... Liquid crystal display device 21 ... Opposite substrate 22 ... Liquid crystal layer 23 ... Backlight 30 ... Organic EL display device 31 ... Organic light emitter 32 ... Organic protective layer 33 ... Inorganic oxide film

Claims (11)

Including pigments, dispersants, alkali-soluble resins, photoinitiators, polyfunctional monomers and solvents,
The P / V ratio, which is the mass ratio of the pigment and the total solid content other than the pigment, is 0.001 or more and 0.1 or less,
The dispersant is a block copolymer or graft copolymer having an A segment containing a structural unit represented by the following general formula (I), and has an amine value of 40 mgKOH / g or more and 130 mgKOH / g or less. A white coloring composition for a color filter.
(In General Formula (I), R ¹ represents a hydrogen atom or a methyl group, A represents —COO—B— or —CONH—B—, B represents a divalent linking group, and R ² and R ³ represent And each independently represents a hydrogen atom or a hydrocarbon group that may contain a hetero atom, and R ² and R ³ may be bonded to each other to form a ring structure.) At least a part of the terminal nitrogen moiety of the structural unit represented by the general formula (I) of the block copolymer or graft copolymer is composed of a compound represented by the following general formulas (1) to (3). The white coloring composition for a color filter according to claim 1, wherein a salt is formed with at least one compound selected from the group.
(In General Formula (1), R ^a is a linear, branched or cyclic alkyl group having 1 to 20 carbon atoms, a vinyl group, an optionally substituted phenyl group or benzyl group, or —O—. R ^e is represented, and R ^e is a linear, branched or cyclic alkyl group having 1 to 20 carbon atoms, a vinyl group, an optionally substituted phenyl group or benzyl group, or a carbon number having 1 to 4 carbon atoms. Represents a (meth) acryloyl group via an alkylene group. In the general formula (2), R ^b , R ^{b ′} and R ^{b ″} each independently have a hydrogen atom, an acidic group or an ester group thereof, and a substituent. A linear, branched or cyclic alkyl group having 1 to 20 carbon atoms, a vinyl group which may have a substituent, a phenyl group or a benzyl group which may have a substituent, or -O- It represents R ^{f, R f} is a also a good number of 1 to 20 carbon having substituent Via a chain, branched or cyclic alkyl group, a vinyl group which may have a substituent, a phenyl group or a benzyl group which may have a substituent, or an alkylene group having 1 to 4 carbon atoms (meth) Represents an acryloyl group, and X represents a chlorine atom, a bromine atom, or an iodine atom, In the general formula (3), R ^c and R ^d are each independently a hydrogen atom, a hydroxyl group, or a straight chain having 1 to 20 carbon atoms. Represents a branched or cyclic alkyl group, a vinyl group, an optionally substituted phenyl group or benzyl group, or —O—R ^e , where R ^e is a linear or branched chain having 1 to 20 carbon atoms. Or a cyclic alkyl group, a vinyl group, a phenyl group or benzyl group which may have a substituent, or a (meth) acryloyl group via an alkylene group having 1 to 4 carbon atoms, provided that R ^c and R ^d At least one of contains a carbon atom. )   3. The white coloring for a color filter according to claim 1, wherein the content of the photoinitiator in the total solid content is in a range of 0.1% by mass to 9.0% by mass. Composition.   The white pigment composition for a color filter according to any one of claims 1 to 3, wherein the pigment contains at least one of a green pigment, a blue pigment, and a purple pigment.   The chromaticity coordinates in the XYZ color system of JIS Z8701 measured by using a C light source are 0.25 ≦ x ≦ 0.38 and 0.25 ≦ y ≦ 0.39. The white coloring composition for a color filter according to any one of claims 1 to 4, which is a pigment composition capable of forming a certain cured film and is for a liquid crystal display device.   The white coloring composition for a color filter according to claim 5, wherein x and y of the chromaticity coordinates are in a relationship of x ≦ y.   The chromaticity coordinates in the XYZ color system of JIS Z8701 measured by using a C light source are 0.27 ≦ x ≦ 0.36 and 0.25 ≦ y ≦ 0.32. The white coloring composition for a color filter according to any one of claims 1 to 4, which is a pigment composition capable of forming a certain cured film and is used for an organic electroluminescence display device.   A method for producing a color filter, comprising a white colored layer forming step of forming a white colored layer using the white colored composition for a color filter according to any one of claims 1 to 7. .   A display device comprising a color filter forming step of forming a color filter having a white colored layer using the white colored composition for a color filter according to any one of claims 1 to 7. Manufacturing method.   A color filter comprising a white colored layer formed using a cured product of the white colored composition for a color filter according to any one of claims 1 to 7.   A display device comprising the color filter according to claim 10.