JP2011174987A - Blue colored composition for color filter, and color filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blue colored composition for a color filter with superior color properties, heat resistance, light resistance, and solvent resistance, causing no contamination caused in a coated film and stable, and a color filter superior in color properties with superior heat resistance, light resistance, and solvent resistance. <P>SOLUTION: The blue colored composition for a color filter is provided, composed of at least a coloring agent and a resin, in which the coloring agent contains a salt-forming compound (A) composed of an anthraquinone acid dye and a quaternary ammonium salt compound. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a blue coloring composition for a color filter used for manufacturing a color filter used in a color liquid crystal display device, a color image pickup tube element, and the like, and a color filter including a filter segment formed using the same. It is.

  The color liquid crystal display device controls the amount of light passing through the second polarizing plate by controlling the degree of polarization of the light that has passed through the first polarizing plate by the liquid crystal layer sandwiched between the two polarizing plates. This is a display device that performs display by using a twisted nematic (TN) type liquid crystal. The liquid crystal display device can perform color display by providing a color filter between two polarizing plates. Therefore, liquid crystal display devices are being developed for use in televisions and personal computer monitors.

  Other typical liquid crystal display devices include an in-plane switching (IPS) method in which a pair of electrodes is provided on one substrate and electrolysis is applied in a direction parallel to the substrate, negative dielectric anisotropy Vertical alignment (VA) method for vertically aligning nematic liquid crystal with optical properties, and Optical Convencence Bend (OCB) method in which the optical axes of uniaxial retardation films are orthogonal to each other to perform optical compensation Etc., and each has been put to practical use.

  In general, a color filter is formed in a fine strip (stripe) shape formed of a red filter layer (R), a green filter layer (G), and a blue filter layer (B) formed on the surface of a transparent substrate such as glass. The filter segments (pixels) are arranged in parallel or intersecting with each other, or the fine filter segments are arranged in a constant vertical and horizontal arrangement. The filter segments are as fine as several microns to several hundreds of microns, and are regularly arranged in a predetermined arrangement for each hue.

  On the color filter used in the color liquid crystal display device, a transparent electrode for driving the liquid crystal is generally formed by vapor deposition or sputtering, and an alignment film for aligning the liquid crystal in a certain direction is formed thereon. Has been. In order to sufficiently obtain the performance of these transparent electrodes and alignment films, it is necessary to perform the formation process at a high temperature of generally 200 ° C. or higher, preferably 230 ° C. or higher.

  Quality items required for the color filter include contrast ratio and brightness. When a color filter with a low contrast ratio is used, the degree of polarization controlled by the liquid crystal is disturbed, and when light must be blocked (OFF state), light must leak or be transmitted (ON) In other words, the transmitted light is attenuated in the state), resulting in a blurred screen. Therefore, in order to realize a high-quality liquid crystal display device, high contrast is indispensable.

  If a color filter with low brightness is used, the light transmittance is low, resulting in a dark screen. In order to obtain a bright screen, it is necessary to increase the number of backlights as light sources. For this reason, from the viewpoint of suppressing an increase in power consumption, increasing the brightness of color filters has become a trend.

  Furthermore, as described above, since color liquid crystal devices have been used for televisions, personal computer monitors, etc., there is a demand for a wide color reproduction region and high reliability as well as higher contrast and higher brightness for color filters. It is high.

In addition, a color image pickup device represented by C-MOS (Complementary Metal Oxide Semiconductor: Complementary Metal Oxide Semiconductor), CCD (Charge Coupled Device), etc. has a red filter layer (R) on the light receiving element. In general, color filters each including a primary color filter segment of an additive mixture of a green filter layer (G) and a blue filter layer (B) are disposed and separated. Further, since high sensitivity can be obtained compared to the primary color filter, a color filter having filter segments of cyan, magenta, and yellow (CMY) corresponding to the complementary colors of red, green, and blue is often used. Complementary color filters are often used in video cameras and the like that are difficult to use an auxiliary light source such as a flash.
In recent years, there is an increasing demand for high transmittance, that is, lightness and high reliability even for color filters used in color image pickup tube elements.

  The color filter production method includes a dyeing method using a dye or a salt-forming dye as a colorant, a dye dispersion method, a pigment dispersion method using a pigment as a colorant, a printing method, and an electrodeposition method. Among these, the dyeing method or the dyeing and dispersing method has a drawback that the heat resistance and light resistance are slightly inferior because the colorant is a dye. Therefore, a pigment having excellent heat resistance and light resistance is used as a colorant for the color filter, and a pigment dispersion method is often used as a manufacturing method because of the accuracy and stability of the forming method.

  In the pigment dispersion method, a color resist is formed by mixing and blending a photosensitive agent or an additive into a resin in which pigment particles as a colorant are dispersed in a resin, and this color resist is applied onto a substrate by a coating device such as a spin coater. In this method, a color filter is produced by forming a coating film by the above, performing selective exposure through a mask with an aligner or a stepper, patterning by alkali development and thermosetting, and repeating this operation.

  In general, the pigment particles are subjected to a micronization treatment and a pigment dispersion in which the micronized pigment is brought close to the primary particles as much as possible is used to suppress light scattering by the pigment and achieve high contrast. In addition, since the transparency of the dispersion is improved, the spectral spectrum of the dispersion has high transmittance, and high brightness is realized. By using this dispersion as a color resist, a color filter having a high contrast ratio and high brightness can be obtained.

Conventionally, as a colorant used for forming a blue filter segment (pixel) or a cyan filter segment (pixel), a phthalocyanine pigment generally excellent in durability and color tone is often used. Phthalocyanine pigments have different crystal types such as α-type, β-type, δ-type, and ε-type, and each has excellent properties such as clearness and high coloring power. It is suitable. As this phthalocyanine pigment, those having various central metals such as copper, zinc, nickel, cobalt, and aluminum are known.
Among these, copper phthalocyanine pigments are widely used because they have the clearest color tone. In addition, metal phthalocyanine pigments such as metal-free phthalocyanine pigments, zinc phthalocyanine pigments, aluminum phthalocyanine pigments, and cobalt phthalocyanine pigments have been put into practical use.

  In a display device such as a liquid crystal display device using a conventional cold cathode tube type backlight, a combination of a copper phthalocyanine pigment and a dioxazine pigment is combined with a blue filter segment or a cyan filter segment to achieve high brightness and wide color. The display area could be achieved. However, as described above, the color filter is required to have higher brightness and a wider color reproduction region.

In order to solve the above problems, a technique for dissolving a dye, not a pigment, in a resin or the like as a colorant has been proposed (for example, see Patent Document 1).
It has long been proposed to use a salt-forming compound of an acid dye and a quaternary ammonium salt as a color filter colorant, and to use a cationic surfactant as a quaternary ammonium salt. It has not been studied to form a color filter by the method, and it has not been found to improve heat resistance and light resistance. (For example, refer to Patent Documents 2 and 3).
After that, it has been studied to form a color filter by photolithography using an amine salt of an acid dye as a color filter pigment, but no salt compound of an appropriate acid dye has been found. It is. (For example, see Patent Document 4)
In addition, although it has been proposed to use an anthraquinone acid dye, a salt-forming compound composed of aminoanthraquinonesulfonic acid and a quaternary ammonium salt for a laser light-transmitting color filter, no investigation in the visible region has been made, We have not yet found a blue material with a clear brightness and wide color reproduction range. (See, for example, Patent Document 5).
Further, as an anthraquinone acid dye as a color filter pigment, I. Although Acid Blue 112 is listed as an example that can be used, the effect has not been found specifically (see, for example, Patent Document 6).

JP-A-6-75375 JP 59-30509 A Japanese Patent Laid-Open No. 1-168775 JP-A-6-51115 JP 2002-228830 A JP 2004-139050 A

  The object of the present invention is excellent in color characteristics, heat resistance, light resistance, solvent resistance, no foreign matter generation on the coating film, stable blue coloring composition for color filters, and color characteristics using the same, The object is to provide a color filter having excellent heat resistance, light resistance and solvent resistance.

  As a result of intensive studies to solve the above problems, the present inventors have found that a salt-forming compound comprising an anthraquinone acid dye and a quaternary ammonium salt compound as a colorant for a blue coloring composition for a color filter ( By using the colorant containing A), it has been found that high brightness and a wide color reproduction region are possible, no foreign matter is generated on the coating film, and it is excellent in resistance. It was made.

  In the present invention, the anthraquinone acid dye is C.I. I. The present invention relates to the blue coloring composition for a color filter, which is classified into acid blue.

  The present invention also relates to the blue coloring composition for a color filter, wherein the anthraquinone acid dye is diaminoanthraquinonesulfonic acid.

（一般式（１）中、
Ｒ₁、Ｒ₂はそれぞれ独立に水素原子、置換基を有してもよいアルキル基、置換基を有してもよいアリール基、置換基を有してもよい脂環基、置換基を有してもよいアルケニル基、置換基を有してもよいアルキニル基、または置換基を有してもよいアルコキシル基のいずれかである。
Ｒ₃〜Ｒ₈はそれぞれ独立に水素原子またはＳＯ₃Ｍ基である。
また、Ｒ₁〜Ｒ₈の少なくとも１つはＳＯ₃Ｍ基であるか、ＳＯ₃Ｍ基で置換されている、アルキル基、アリール基、脂環基、アルケニル基、アルキニル基、またはアルコキシル基のいずれかである。
Ｍは水素イオンまたはナトリウムイオンを表す。） The present invention also relates to the blue colored composition for a color filter, wherein the anthraquinone acid dye is represented by the following general formula (1).
General formula (1)

(In general formula (1),
R ₁ and R ₂ each independently have a hydrogen atom, an alkyl group that may have a substituent, an aryl group that may have a substituent, an alicyclic group that may have a substituent, or a substituent. Or an alkynyl group which may have a substituent, or an alkoxyl group which may have a substituent.
R _{3 to} R ₈ are each independently a hydrogen atom or a SO ₃ M group.
In addition, at least one of R _{1 to} R ₈ is an SO ₃ M group, or an alkyl group, an aryl group, an alicyclic group, an alkenyl group, an alkynyl group, or an alkoxyl group that is substituted with an SO ₃ M group. Either.
M represents a hydrogen ion or a sodium ion. )

  In the present invention, the anthraquinone acid dye is C.I. I. Acid Blue 62, 112, 138, and at least one selected from the group consisting of 140. The blue colored composition for a color filter as described above.

  Moreover, this invention relates to the blue coloring composition for said color filters whose molecular weight of the cation part of a quaternary ammonium salt compound is the range of 190-900.

（一般式（２）中、Ｒ₉〜Ｒ₁₂ は、それぞれ独立に、炭素数１〜２０のアルキル基またはベンジル基を示し、Ｒ₉、Ｒ₁₀、Ｒ₁₁、Ｒ₁₂の少なくとも２つ以上がＣの数が５〜２０個である。Ｙ^-は無機または有機のアニオンを表す。） Moreover, this invention relates to the said blue coloring composition for color filters characterized by a quaternary ammonium salt compound being represented by following General formula (2).
General formula (2)

(In General Formula (2), R _{9 to} R ₁₂ each independently represents an alkyl group having 1 to 20 carbon atoms or a benzyl group, and at least two of R ₉ , R ₁₀ , R ₁₁ and R ₁₂ are present. The number of C is 5 to 20. Y ⁻ represents an inorganic or organic anion.)

  The present invention also relates to the blue coloring composition for a color filter, wherein the colorant further contains a blue pigment.

  The present invention also relates to the blue coloring composition for a color filter, wherein the blue pigment is a phthalocyanine pigment and / or a triarylmethane lake pigment.

  In the present invention, the phthalocyanine pigment is C.I. I. It is related with the blue coloring composition for the said color filter characterized by being pigment blue 15: 6.

  In addition, the present invention relates to the blue coloring composition for a color filter, wherein the colorant further contains a dioxazine pigment.

  The present invention also relates to the blue coloring composition for a color filter, further comprising a photopolymerizable monomer and / or a photopolymerization initiator.

  The present invention also provides a color filter comprising at least one red filter segment, at least one green filter segment, and at least one blue filter segment, wherein at least one blue filter segment is formed of the blue coloring composition for the color filter. The present invention relates to a color filter.

  In the present invention, a color formed by a blue coloring composition for a color filter using a colorant containing a salt-forming compound (A) comprising an anthraquinone acid dye and a quaternary ammonium salt compound (counter component thereof) and a resin. By using a filter, it is possible to obtain a color filter having high brightness, a wide color reproduction region, excellent solvent solubility, and excellent salt resistance by using a salt-forming compound. In particular, anthraquinone acid dyes are C.I. I. In the case of Acid Blue 112, an excellent effect can be obtained.

  In addition, the transmittance spectrum of the coloring composition for color filters, which is a combination of a conventional copper phthalocyanine blue pigment and a dioxazine pigment, has a peak position in the vicinity of 450 nm, and the transmittance sharply decreases on the short wavelength side of 450 nm or less. ing. On the other hand, the blue coloring composition for a color filter of the present invention contains a salt-forming compound (A) composed of an anthraquinone acid dye and a quaternary ammonium salt compound (a counter component thereof) as a colorant, and is 450 nm or less. As compared with the copper phthalocyanine blue pigment, high transmittance is maintained even on the short wavelength side. Therefore, it effectively acts on a peak in the vicinity of 425 to 500 nm of many backlights such as cold cathode fluorescent lamps, and high brightness can be obtained.

Hereinafter, the present invention will be described in detail.
In addition, “CI” described below means a color index (CI).

  The blue coloring composition for color filters of the present invention comprises a colorant carrier containing a resin, an anthraquinone acid dye as a colorant, in particular, an anthraquinone acid dye exhibiting a blue color, and a quaternary ammonium salt compound (counter component thereof). It is a blue coloring composition for color filters containing a salt-forming compound (A).

<Colorant>
As a coloring agent of the blue coloring composition for color filters of the present invention, a salt-forming compound (A) comprising an anthraquinone acid dye and a quaternary ammonium salt compound is included.
By using the salt-forming compound (A), it becomes possible to have a high spectral spectrum transmittance in the vicinity of 425 to 500 nm which is a characteristic peak of many backlights as described above. Higher brightness and wider color reproducibility can be obtained than a color filter combining only a phthalocyanine pigment and a dioxazine pigment. Furthermore, by salting an acidic dye, it can have high heat resistance, light resistance and solvent resistance.

(Salt-forming compound comprising anthraquinone acid dye and quaternary ammonium salt compound (A))
The salt-forming compound (A) will be described. The anthraquinone acid dye used for the salt-forming compound (A) composed of an anthraquinone acid dye and a quaternary ammonium salt compound exhibits a blue color and has the form of an acid dye.
To exhibit blue, C.I. I. Acid Blue acid dyes, C.I. I. Direct Blue belongs to the direct dye. Here, since the direct dye has a sulfonic acid group, it is regarded as synonymous with an acid dye in the present invention.
Further, the salt-forming compound (A) belongs to a salt-forming dye that is salted and modified with these anthraquinone acid dyes (including direct dyes) and a quaternary ammonium salt compound that is a counter component that works as a counter ion. .

[Anthraquinone acid dyes]
Anthraquinone acid dyes that can be used in the present invention include C.I. I. Acid Blue acid dyes, C.I. I. Direct Blue belongs to the direct dye, C.I. I. What is classified into acid blue is more preferable.
Specifically, the following anthraquinone dyes can be used.
C. I. Acid Blue 23, C.I. I. Acid Blue 25, C.I. I. Acid Blue 27, C.I. I. Acid Blue 35, C.I. I. Acid Blue 40, C.I. I. Acid Blue 41, C.I. I. Acid Blue 43, C.I. I. Acid Blue 45, C.I. I. Acid Blue 47, C.I. I. Acid Blue 49, C.I. I. Acid Blue 51, C.I. I. Acid Blue 53, C.I. I. Acid Blue 55, C.I. I. Acid Blue 56, C.I. I. Acid Blue 62, C.I. I. Acid Blue 68, C.I. I. Acid Blue 69, C.I. I. Acid Blue 78, C.I. I. Acid Blue 80, C.I. I. Acid Blue 81: 1, C.I. I. Acid Blue 111, C.I. I. Acid Blue 112, C.I. I. Acid Blue 124, C.I. I. Acid Blue 127, C.I. I. Acid Blue 127: 1, C.I. I. Acid Blue 138, C.I. I. Acid Blue 140, C.I. I. Acid Blue 150, C.I. I. Acid Blue 175, C.I. I. Acid Blue 215, C.I. I. Acid Blue 230, C.I. I. Acid Blue 277, C.I. I. Acid Blue 344 etc.
Among them, C.I. I. Acid Blue 112, 62, 138, and 140 are particularly preferable because of excellent lightness of the blue coloring composition.

  An anthraquinone acid dye which is diaminoanthraquinone sulfonic acid is preferable in terms of exhibiting color development, color reproducibility and high brightness while having heat resistance and light resistance. The reason why these are excellent in heat resistance and light resistance is presumed that the structure is stabilized by bonding the carbonyl group part of the anthraquinone skeleton and the amino group part with a hydrogen bond.

（一般式（１）中、
Ｒ₁、Ｒ₂はそれぞれ独立に水素原子、置換基を有してもよいアルキル基、置換基を有してもよいアリール基、置換基を有してもよい脂環基、置換基を有してもよいアルケニル基、置換基を有してもよいアルキニル基、または置換基を有してもよいアルコキシル基のいずれかである。
Ｒ₃〜Ｒ₈はそれぞれ独立に水素原子またはＳＯ₃Ｍ基である。
また、Ｒ₁〜Ｒ₈の少なくとも１つはＳＯ₃Ｍ基であるか、ＳＯ₃Ｍ基で置換されている、アルキル基、アリール基、脂環基、アルケニル基、アルキニル基、またはアルコキシル基のいずれかである。
Ｍは水素イオンまたはナトリウムイオンを表す。） Especially, since the anthraquinone type acidic dye represented by following General formula (1) is excellent in the heat resistance of the coloring composition for color filters, and light resistance, it is preferable.
General formula (1)

(In general formula (1),
R ₁ and R ₂ each independently have a hydrogen atom, an alkyl group that may have a substituent, an aryl group that may have a substituent, an alicyclic group that may have a substituent, or a substituent. Or an alkynyl group which may have a substituent, or an alkoxyl group which may have a substituent.
R _{3 to} R ₈ are each independently a hydrogen atom or a SO ₃ M group.
In addition, at least one of R _{1 to} R ₈ is an SO ₃ M group, or an alkyl group, an aryl group, an alicyclic group, an alkenyl group, an alkynyl group, or an alkoxyl group that is substituted with an SO ₃ M group. Either.
M represents a hydrogen ion or a sodium ion. )

As R ₂ and R ₄ in the general formula (1), specific examples of the alkyl group which may have a substituent include methyl group, ethyl group, propyl group, isopropyl group, butyl group, isobutyl group, sec -Butyl, tert-butyl, pentyl, hexyl, octyl, decyl, dodecyl, octadecyl, chloromethyl, bromomethyl, hydroxymethyl, cyanomethyl, nitromethyl, methoxymethyl, aminomethyl Group, dimethylaminomethyl group, acetonyl group, ethoxycarbonylmethyl group, diethylaminocarboxymethyl group, p-hydroxyphenylmethyl group, methylthiomethyl group, ethylthiomethyl group, butylthiomethyl group, phenylthiomethyl group, methylsulfinylmethyl group , Methylsulfonylmethyl group, ethyl Examples thereof include a sulfonylmethyl group, a benzenesulfonylmethyl group, a p-toluenesulfonylmethyl group, a salicyl group, an anisyl group, and the aryl group which may have a substituent includes a phenyl group, a p-tolyl group, a xylyl group, and a mesityl group. Group, cumenyl group, biphenylyl group, naphthyl group, anthryl group, phenanthryl group, chlorophenyl group, bromophenyl group, fluorophenyl group and the like, and the alicyclic group which may have a substituent includes cyclohexyl group, cyclopentyl Group, cyclohexenyl group, norbornyl group, bornyl group, menthyl group, pinanyl group, adamantyl group and the like, and examples of the alkenyl group which may have a substituent include a vinyl group, a 2-propenyl group, an isopropenyl group, Butenyl, styryl group, cinnamyl group, etc. Suitable alkynyl groups include ethynyl groups, propynyl groups, and the like, and alkoxy groups that may have substituents include methoxy groups, tert-butoxy groups, benzyloxy groups, and the like. Examples of the aryloxy group that may be used include a phenoxy group, a p-tolyloxy group, a p-fluorophenoxy group, and a p-nitrophenoxy group.

Examples of the substituent include alkyl group, aryl group, alkoxy group, aryloxy group, acyloxy group, sulfonic acid group, carboxyl group, halogen atom, acylamino group, acyl group, alkylthio group, arylthio group, hydroxy group, cyano group, amino group Groups and the like.
Moreover, in this invention, a sulfonate group is also synonymous with a sulfonic acid group.

Also, substituted with at least one or a SO ₃ M group, SO ₃ M alkyl group substituted with a group, SO ₃ M aryl group substituted with a group, SO ₃ M groups R ₁ to R ₈ has been being alicyclic group, or a alkenyl group, SO ₃ M alkynyl group substituted with a group or SO ₃ M alkoxyl group substituted with a group, which is substituted by SO ₃ M group.

  Specific structural formulas of preferable anthraquinone acid dyes are shown below, but are not limited thereto.

C. I. Acid Blue 112

C. I. Acid Blue 62

C. I. Acid Blue 138

  The anthraquinone acid dye used in the present invention exceeds 80% in the 440 nm region in the transmission spectrum, has a transmittance of 75% or more in the 450 nm region, and has a transmittance of 10% or less in the 550 nm region. Is preferred.

[Quaternary ammonium salt compound]
Next, the quaternary ammonium salt compound as a counter component of the xanthene acid dye will be described. A quaternary ammonium salt compound becomes an acid dye counter by having an amino group.

A preferred form of the quaternary ammonium salt compound which is a counter component of the salt-forming compound (A) is colorless or white.
Here, colorless or white means a so-called transparent state, and is defined as a state where the transmittance is 95% or more, preferably 98% or more in the entire wavelength region of 400 to 700 nm in the visible light region. Is. That is, it is necessary not to inhibit color development of the dye component and to cause no color change.

It is preferable that the molecular weight of the counter part which is a cation component of a quaternary ammonium salt compound is in the range of 190-900. Here, the cation moiety corresponds to the (NR ₉ R ₁₀ R ₁₁ R ₁₂ ) ⁺ moiety in the following general formula (2). When the molecular weight is smaller than 190, light resistance and heat resistance are lowered, and further, solubility in a solvent is lowered. On the other hand, when the molecular weight is larger than 900, the ratio of the color developing component in the molecule is lowered, the color developability is lowered, and the lightness is also lowered. More preferably, the molecular weight of the counter portion is in the range of 240-850. Particularly preferred is a counter portion with a molecular weight in the range of 350-800.
Here, the molecular weight was calculated based on the structural formula. The atomic weight of C was 12, the atomic weight of H was 1, and the atomic weight of N was 14.

  Moreover, what is represented by following General formula (2) is used as a quaternary ammonium salt compound.

General formula (2)

(In General Formula (2), R _{9 to} R ₁₂ each independently represents an alkyl group having 1 to 20 carbon atoms or a benzyl group, and at least two of R ₉ , R ₁₀ , R ₁₁ and R ₁₂ are present. The number of C is 5 to 20. Y ⁻ represents an inorganic or organic anion.)

The solubility with respect to a solvent becomes favorable because at least 2 or more of R < ₉ > -R < ₁₂ > makes the number of C 5-20. When the number of alkyl groups having a C number of less than 5 is 3 or more, solubility in a solvent is deteriorated, and coating film foreign matter is likely to be generated. Moreover, when the alkyl group which the number of C exceeds 20 exists, the color development property of a salt-forming compound (A) will be impaired.

Specifically, tetramethylammonium chloride (molecular weight of the cation moiety is 74), tetraethylammonium chloride (molecular weight of the cation moiety is 122), monostearyltrimethylammonium chloride (molecular weight of the cation moiety is 312), distearyldimethylammonium chloride ( Cation portion molecular weight 550), tristearyl monomethylammonium chloride (cation portion molecular weight 788), cetyltrimethylammonium chloride (cation portion molecular weight 284), trioctylmethylammonium chloride (cation portion molecular weight 368), dioctyl Dimethylammonium chloride (cation part molecular weight 270), monolauryltrimethylammonium chloride (cation part molecule) 228), dilauryldimethylammonium chloride (cation part molecular weight 382), trilaurylmethylammonium chloride (cation part molecular weight 536), triamylbenzylammonium chloride (cation part molecular weight 318), trihexylbenzylammonium Chloride (cation part molecular weight 360), trioctylbenzylammonium chloride (cation part molecular weight 444), trilaurylbenzylammonium chloride (cation part molecular weight 612), benzyldimethylstearyl ammonium chloride (cation part molecular weight 388) ), and benzyl dimethyl octyl ammonium chloride (molecular weight of the cationic portion 248), dialkyl (alkyl C ₁₄ -C ₁₈₎ di It is preferable to use methylammonium chloride (cured beef tallow) (the molecular weight of the cation moiety is 438 to 550).

The component of Y ⁻ constituting the anion may be an inorganic or organic anion, but is preferably a halogen, usually chlorine.

Specific examples of the quaternary ammonium salt compound products include Cotamin 24P, Cotamin 86P Conch, Cotamin 60W, Cotamin 86W, Cotamin D86P, Sanizole C, Sanizole B-50, etc. manufactured by Lion Corp. , 2C-75,2HT-75,2HT flakes, 2O-75I, 2HP-75,2HP flakes and the like, among others QUARTAMIN D86P (distearyldimethylammonium chloride), Arquad 2HT-75 (di (alkyl C ₁₄ ~ _C18 ) dimethylammonium chloride) is preferred.

[Chlorination]
A salt-forming compound of an anthraquinone acid dye and a quaternary ammonium salt compound can be synthesized by a conventionally known method.
For example, after anthraquinone acid dye is dissolved in water, a quaternary ammonium salt compound may be added and subjected to chlorination while stirring. Here, a salt-forming compound in which the sulfonic acid group (—SO ₃ H, —SO ₃ Na) portion in the anthraquinone acid dye and the ammonium group (NH ₄ +) portion of the quaternary ammonium salt compound are obtained is obtained. In addition, instead of water, methanol and ethanol are also solvents that can be used for the chlorination.

  The salt-forming compound (A) is particularly preferably C.I. I. By setting the molecular weight of the counter, which is a cationic component of Acid Blue 112 and the quaternary ammonium salt compound, to 350 to 800, the solvent solubility is excellent, and the heat resistance, light resistance, and solvent resistance are excellent.

(Other colorants)
[Blue pigment]
In addition to the salt-forming compound (A) as a colorant, the blue coloring composition for a color filter of the present invention is preferably used in combination with a blue pigment for the purpose of increasing the coloring power. The reason why the salt-forming compound (A) is favorable when used in combination with the blue pigment is that it is adsorbed on the blue pigment while being dissolved and dispersed in the solvent. When used in combination with a blue pigment, the concentration becomes high, and the color reproducibility is excellent.
In particular, C.I. I. Acid blue 62, 112, 138, and any salt-forming compound (A) selected from the group consisting of 140 and a blue pigment are used in combination with a high brightness, clearness, excellent color reproducibility, solvent It is possible to obtain a colorant having excellent stability against

As the blue pigment, a phthalocyanine pigment and / or a triarylmethane lake pigment or the like is used. As the phthalocyanine pigment, it is preferable to use a copper phthalocyanine blue pigment.
Examples of the copper phthalocyanine blue pigment include C.I. I. Pigment blue 15, C.I. I. Pigment blue 15: 1, C.I. I. Pigment blue 15: 2, C.I. I. Pigment blue 15: 3, C.I. I. Pigment blue 15: 4, C.I. I. Pigment blue 15: 6, and the like. Among them, copper phthalocyanine blue pigments having ε-type and α-type structures are preferable. Such preferred pigments are specifically C.I. I. Pigment blue 15: 6 and C.I. I. Pigment Blue 15: 1.
Examples of triarylmethane lake pigments include C.I. I. Pigment blue 1, 1: 2, 1: 3, C.I. I. Pigment Blue 2, 2: 1, 2: 2, C.I. I. Pigment blue 3, C.I. I. Pigment Blue 8, C.I. I. Pigment blue 9, C.I. I. Pigment Blue 10, 10: 1, C.I. I. Pigment blue 11, C.I. I. Pigment blue 12, C.I. I. Pigment blue 18, C.I. I. Pigment blue 19, C.I. I. Pigment blue 24, 24: 1, C.I. I. Pigment blue 53, C.I. I. Pigment blue 56, 56: 1, C.I. I. Pigment blue 57, C.I. I. Pigment blue 58, C.I. I. Pigment blue 59, C.I. I. Pigment blue 61, C.I. I. Pigment blue 62 and the like.
Among these, C.I. I. When CI Pigment Blue 15: 6 is used, the heat resistance becomes better. I. Pigment Blue 1 is preferable because of its excellent brightness.

  The usage ratio of the blue pigment and the salt-forming compound (A) is preferably 0 to 1000 parts by weight of the blue pigment with respect to 100 parts by weight of the salt-forming compound (A). More preferably, it is 0 to 400 parts by weight. If the amount of the blue pigment added exceeds 1000 parts by weight, the lightness is lowered, which is not preferable.

[Other pigments]
In addition, other organic pigments other than blue can be added to the blue coloring composition of the present invention as long as the effects are not hindered.
In the case of organic pigments other than blue, it is preferable to use a dioxazine pigment, anthraquinone pigment, azo pigment, or quinacridone pigment in combination. Among them, it is preferable to use a dioxazine pigment in combination. Examples of the dioxazine pigment include C.I. I. Pigment Violet 23 is preferably used. By using a dioxazine pigment in combination with the blue coloring composition of the present invention, it is possible to obtain a stable and high-quality blue coloring composition which is further excellent in heat resistance, light resistance and solvent resistance.

  The content of the pigment other than the blue pigment is preferably 20% by weight or less based on the total weight of the colorant of the blue coloring composition (100% by weight). When it is more than 20% by weight, it becomes difficult to satisfy the target hue as blue.

[Miniaturization of pigment]
The pigment used in the blue coloring composition of the present invention is preferably used after being subjected to a salt milling process and refined. The primary particle diameter of the pigment is preferably 20 nm or more because of good dispersion in the colorant carrier. Moreover, since it can form a filter segment with high contrast ratio, it is preferable that it is 100 nm or less. A particularly preferable range is a range of 25 to 85 nm. The primary particle diameter of the pigment was measured by directly measuring the size of the primary particle from an electron micrograph of the pigment using a TEM (transmission electron microscope). Specifically, the minor axis diameter and major axis diameter of the primary particles of each pigment were measured, and the average was taken as the particle diameter of the pigment particles. Next, with respect to 100 or more pigment particles, the volume of each particle is obtained by approximating it with a cube of the obtained particle size, and the volume average particle size is defined as the average primary particle size.

  Salt milling is a process in which a mixture of pigment, water-soluble inorganic salt and water-soluble organic solvent is heated using a kneader such as a kneader, two-roll mill, three-roll mill, ball mill, attritor, or sand mill. After kneading, the water-soluble inorganic salt and the water-soluble organic solvent are removed by washing with water. The water-soluble inorganic salt serves as a crushing aid, and the pigment is crushed using the high hardness of the inorganic salt during salt milling. By optimizing the conditions for salt milling the pigment, it is possible to obtain a pigment having a sharp particle size distribution with a very fine primary particle diameter and a wide distribution range.

  As the water-soluble inorganic salt, sodium chloride, barium chloride, potassium chloride, sodium sulfate and the like can be used, but sodium chloride (salt) is preferably used from the viewpoint of cost. The water-soluble inorganic salt is preferably used in an amount of 50 to 2000% by weight, and most preferably 300 to 1000% by weight based on the total weight of the pigment (100% by weight) from the viewpoint of both processing efficiency and production efficiency.

  The water-soluble organic solvent functions to wet the pigment and the water-soluble inorganic salt, and is not particularly limited as long as it dissolves (mixes) in water and does not substantially dissolve the inorganic salt to be used. However, a high boiling point solvent having a boiling point of 120 ° C. or higher is preferable from the viewpoint of safety because the temperature rises during salt milling and the solvent is easily evaporated. For example, 2-methoxyethanol, 2-butoxyethanol, 2- (isopentyloxy) ethanol, 2- (hexyloxy) ethanol, diethylene glycol, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, triethylene glycol, triethylene glycol monomethyl ether, Liquid polyethylene glycol, 1-methoxy-2-propanol, 1-ethoxy-2-propanol, dipropylene glycol, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, liquid polypropylene glycol and the like are used. The water-soluble organic solvent is preferably used in an amount of 5 to 1000% by weight, and most preferably 50 to 500% by weight, based on the total weight of the pigment (100% by weight).

  When the salt is milled, a resin may be added as necessary. The type of resin used is not particularly limited, and natural resins, modified natural resins, synthetic resins, synthetic resins modified with natural resins, and the like can be used. The resin used is solid at room temperature, preferably insoluble in water, and more preferably partially soluble in the organic solvent. The amount of resin used is preferably in the range of 5 to 200% by weight based on the total weight of the pigment (100% by weight).

<Resin>
The resin is one that disperses a colorant, particularly a salt-forming compound, or one that dyes and permeates the salt-forming compound, and examples thereof include thermoplastic resins and thermosetting resins.
The resin preferably has a spectral transmittance of 80% or more, more preferably 95% or more in the entire wavelength region of 400 to 700 nm in the visible light region. Moreover, when using with the form of the alkali image development type | mold coloring resist material mentioned later, it is preferable to use the alkali-soluble vinyl-type resin which copolymerized the acidic group containing ethylenically unsaturated monomer. In order to further improve the photosensitivity, an active energy ray-curable resin having an ethylenically unsaturated double bond can also be used.

  In particular, by using an active energy ray-curable resin having an ethylenically unsaturated double bond in the side chain, no coating film foreign matter is generated after the resist material is applied, and the salt-forming compound (A) in the resist material is not generated. Stability is improved and preferable. When a linear resin that does not have an ethylenically unsaturated double bond in the side chain is used, the dye is not easily trapped in the resin and dye mixture, and the dye has a degree of freedom. The components tend to aggregate and precipitate, but by using an active energy ray-curable resin having an ethylenically unsaturated double bond in the side chain, the dye is easily trapped in the resin and dye mixture, Dye components are less likely to agglomerate and precipitate, and even when exposed to active energy rays to form a film, the resin is three-dimensionally cross-linked to fix the dye molecules, and the solvent can be removed in the subsequent development process. It is estimated that the dye component is less likely to aggregate and precipitate.

  The weight average molecular weight (Mw) of the resin is preferably in the range of 10,000 to 100,000, more preferably in the range of 10,000 to 80,000, in order to disperse the colorant preferably. The number average molecular weight (Mn) is preferably in the range of 5,000 to 50,000, and the value of Mw / Mn is preferably 10 or less.

  When the resin is used as a photosensitive coloring composition for a color filter, from the viewpoints of dispersibility, penetrability, developability, and heat resistance of the pigment and salt-forming compound, the colorant adsorbing group and alkali-soluble during development are used. The balance of carboxyl groups that act as groups, aliphatic groups and aromatic groups that act as affinity groups for colorant carriers and solvents is important for the dispersibility, penetrability, developability, and even durability of pigments and salt-forming compounds. It is preferable to use a resin having an acid value of 20 to 300 mgKOH / g. When the acid value is less than 20 mgKOH / g, the solubility in the developing solution is poor and it is difficult to form a fine pattern. When it exceeds 300 mgKOH / g, no fine pattern remains.

  Since the resin has good film formability and various resistances, the resin is preferably used in an amount of 30% by weight or more based on the total weight of the colorant (100% by weight), and has a high colorant concentration and good color. Since the characteristics can be expressed, it is preferably used in an amount of 500% by weight or less.

(Thermoplastic resin)
Examples of the thermoplastic resin include acrylic resin, butyral resin, styrene-maleic acid copolymer, chlorinated polyethylene, chlorinated polypropylene, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, polyvinyl acetate, and polyurethane resin. Polyester resins, vinyl resins, alkyd resins, polystyrene resins, polyamide resins, rubber resins, cyclized rubber resins, celluloses, polyethylene (HDPE, LDPE), polybutadiene, and polyimide resins.

  Examples of the vinyl-based alkali-soluble resin copolymerized with an acidic group-containing ethylenically unsaturated monomer include resins having an acidic group such as a carboxyl group or a sulfone group. Specific examples of the alkali-soluble resin include an acrylic resin having an acidic group, an α-olefin / (anhydrous) maleic acid copolymer, a styrene / styrene sulfonic acid copolymer, an ethylene / (meth) acrylic acid copolymer, or Examples include isobutylene / (anhydrous) maleic acid copolymer. Among these, at least one resin selected from an acrylic resin having an acidic group and a styrene / styrene sulfonic acid copolymer, particularly an acrylic resin having an acidic group, is preferably used because of its high heat resistance and transparency.

  Examples of the active energy ray-curable resin having an ethylenically unsaturated double bond include resins having an unsaturated ethylenic double bond introduced by the following methods (a) and (b).

[Method (a)]
As the method (a), for example, the side chain epoxy group of a copolymer obtained by copolymerizing an unsaturated ethylenic monomer having an epoxy group and one or more other monomers is used. Then, the carboxyl group of the unsaturated monobasic acid having an unsaturated ethylenic double bond is subjected to an addition reaction, and the resulting hydroxyl group is reacted with a polybasic acid anhydride to convert the unsaturated ethylenic double bond and the carboxyl group into There is a way to introduce.

Examples of the unsaturated ethylenic monomer having an epoxy group include glycidyl (meth) acrylate, methyl glycidyl (meth) acrylate, and 2-glycidoxyethyl (meth).
An acrylate, 3,4 epoxy butyl (meth) acrylate, and 3,4 epoxy cyclohexyl (meth) acrylate are mentioned, These may be used independently or may use 2 or more types together. In view of reactivity with unsaturated monobasic acid in the next step, glycidyl (meth)
Acrylate is preferred.

As unsaturated monobasic acids, (meth) acrylic acid, crotonic acid, o-, m-, p-vinylbenzoic acid, α-haloalkyl of (meth) acrylic acid, alkoxyl, halogen, nitro,
Examples thereof include monocarboxylic acids such as cyano-substituted products, and these may be used alone or in combination of two or more.

Examples of the polybasic acid anhydride include tetrahydrophthalic anhydride, phthalic anhydride, hexahydrophthalic anhydride, succinic anhydride, maleic anhydride and the like.
More than one type may be used together. If necessary, use a tricarboxylic anhydride such as trimellitic anhydride or a tetracarboxylic dianhydride such as pyromellitic dianhydride to increase the number of carboxyl groups. The group can also be hydrolyzed. Moreover, when an etrahydrophthalic anhydride or maleic anhydride having an unsaturated ethylenic double bond is used as the polybasic acid anhydride, the number of unsaturated ethylenic double bonds can be increased.

  As a similar method to the method (a), for example, a side chain of a copolymer obtained by copolymerizing an unsaturated ethylenic monomer having a carboxyl group and one or more other monomers. There is a method in which an unsaturated ethylenic monomer having an epoxy group is added to a part of a carboxyl group to introduce an unsaturated ethylenic double bond and a carboxyl group.

[Method (b)]
As the method (b), an unsaturated ethylenic monomer having a hydroxyl group is used, and an unsaturated monobasic acid monomer having another carboxyl group or by copolymerizing with another monomer. There is a method of reacting an isocyanate group of an unsaturated ethylenic monomer having an isocyanate group with a side chain hydroxyl group of the obtained copolymer.

Examples of the unsaturated ethylenic monomer having a hydroxyl group include 2-hydroxyethyl (meth) acrylate, 2- or 3-hydroxypropyl (meth) acrylate, 2- or 3
-Hydroxyalkyl (meth) acrylates such as 4-hydroxybutyl (meth) acrylate, glycerol (meth) acrylate, or cyclohexanedimethanol mono (meth) acrylate may be mentioned. The above may be used together. In addition, polyether mono (meth) acrylate obtained by addition polymerization of the above hydroxyalkyl (meth) acrylate with ethylene oxide, propylene oxide, and / or butylene oxide, (poly) γ-valerolactone, (poly) ε-caprolactone And / or (poly) 12-hydroxystearic acid added (poly) ester mono (meth) acrylate can also be used. From the viewpoint of suppressing foreign matter on the coating film, 2-hydroxyethyl (meth) acrylate or glycerol (meth) acrylate is preferable.

Examples of the unsaturated ethylenic monomer having an isocyanate group include 2- (meth) acryloyloxyethyl isocyanate, 1,1-bis [(meth) acryloyloxy] ethyl isocyanate, and the like. In addition, two or more types can be used in combination.

(Thermosetting resin)
Examples of the thermosetting resin include epoxy resin, benzoguanamine resin, rosin-modified maleic acid resin, rosin-modified fumaric acid resin, melamine resin, urea resin, and phenol resin.

<Solvent>
In the blue coloring composition of the present invention, a colorant is sufficiently dispersed and permeated in a colorant carrier, and applied to a glass substrate or the like so as to have a dry film thickness of 0.2 to 5 μm. In order to make it easier to form, a solvent can be included.
Examples of the solvent include ethyl lactate, benzyl alcohol, 1,2,3-trichloropropane, 1,3-butanediol, 1,3-butylene glycol, 1,3-butylene glycol diacetate, 1,4-dioxane, 2 -Heptanone, 2-methyl-1,3-propanediol, 3,5,5-trimethyl-2-cyclohexen-1-one, 3,3,5-trimethylcyclohexanone, ethyl 3-ethoxypropionate, 3-methyl- 1,3-butanediol, 3-methoxy-3-methyl-1-butanol, 3-methoxy-3-methylbutyl acetate, 3-methoxybutanol, 3-methoxybutyl acetate, 4-heptanone, m-xylene, m- Diethylbenzene, m-dichlorobenzene, N, N-dimethylacetamide, N, N-dimethylformamide, n-butyl alcohol, n-butylbenzene, n-propylacetate , O-xylene, o-chlorotoluene, o-diethylbenzene, o-dichlorobenzene, p-chlorotoluene, p-diethylbenzene, sec-butylbenzene, tert-butylbenzene, γ-butyrolactone, isobutyl alcohol, isophorone, ethylene Glycol diethyl ether, ethylene glycol dibutyl ether, ethylene glycol monoisopropyl ether, ethylene glycol monoethyl ether, ethylene glycol monoethyl ether acetate, ethylene glycol monotertiary butyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether acetate, ethylene glycol monopropyl Ether, ethylene glycol monohexyl ether, ethylene glycol Methyl ether, ethylene glycol monomethyl ether acetate, diisobutyl ketone, diethylene glycol diethyl ether, diethylene glycol dimethyl ether, diethylene glycol monoisopropyl ether, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether, diethylene glycol monobutyl ether acetate, diethylene glycol monomethyl ether, cyclohexanol, cyclohexanol acetate, Cyclohexanone, dipropylene glycol dimethyl ether, dipropylene glycol methyl ether acetate, dipropylene glycol monoethyl ether, dipropylene glycol monobutyl ether, dipropylene glycol monopropyl ether Dipropylene glycol monomethyl ether, diacetone alcohol, triacetin, tripropylene glycol monobutyl ether, tripropylene glycol monomethyl ether, propylene glycol diacetate, propylene glycol phenyl ether, propylene glycol monoethyl ether, propylene glycol monoethyl ether acetate, propylene Glycol monobutyl ether, propylene glycol monopropyl ether, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether propionate, benzyl alcohol, methyl isobutyl ketone, methylcyclohexanol, n-amyl acetate, n-butyl acetate, Acetate Amyl, isobutyl acetate, propyl acetate, and a dibasic acid ester and the like.

Among them, since the dispersion and solubility of the pigment of the present invention and the salt-forming compound (A) are good, ethyl lactate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl It is preferable to use glycol acetates such as ether acetate, aromatic alcohols such as benzyl alcohol, and ketones such as cyclohexanone.
A solvent can be used individually by 1 type or in mixture of 2 or more types. Moreover, since the solvent can adjust the coloring composition to an appropriate viscosity and can form a filter segment having a desired uniform film thickness, it is 800 to 4000% by weight based on the total weight of the colorant (100% by weight). It is preferable to use in an amount.

<Method for producing colored composition>
The blue coloring composition of the present invention comprises a salt-forming compound (A) comprising an anthraquinone acid dye and a quaternary ammonium salt compound (counter component thereof), and optionally a colorant such as a blue pigment. Can be produced by dissolving or dispersing in a colorant carrier comprising the resin and, if necessary, a solvent. In the case of production by dispersion, it is preferably finely dispersed by using various dispersing means such as a three roll mill, a two roll mill, a sand mill, a kneader, or an attritor together with a dispersion aid such as a pigment derivative. Can be manufactured. The blue colored composition of the present invention can also be produced by mixing a salt-forming compound (A), other colorants such as a blue pigment, or the like separately dissolved or dispersed in a colorant carrier.

(Dispersing aid)
When dispersing the colorant in the colorant carrier, a dispersion aid such as a pigment derivative, a resin-type dispersant, and a surfactant can be appropriately used. The dispersion aid is excellent in dispersion of the colorant and has a large effect of preventing reaggregation of the colorant after dispersion. Therefore, a dispersion composition is used to disperse the colorant in the colorant carrier using the dispersion aid. When used, a color filter having a high spectral transmittance can be obtained.
In the present invention, the salt-forming compound (A) is a preferred combination that can also serve as a dispersion aid for the blue pigment.

Examples of the dye derivative include a compound in which a basic substituent, an acidic substituent, or an optionally substituted phthalimidomethyl group is introduced into an organic pigment, anthraquinone, acridone, or triazine.
In the present invention, a pigment derivative is particularly preferable, and the structure thereof is a compound represented by the following general formula (3).
P-Ln Formula (3)
(However,
P: organic pigment residue, anthraquinone residue, acridone residue or triazine residue L: basic substituent, acidic substituent, or optionally substituted phthalimidomethyl group n: an integer of 1 to 4 is there)
Examples of the organic pigment constituting the organic pigment residue of P include, for example, diketopyrrolopyrrole pigments; azo pigments such as azo, disazo and polyazo; phthalocyanine pigments such as copper phthalocyanine, halogenated copper phthalocyanine and metal-free phthalocyanine Anthraquinone pigments such as aminoanthraquinone, diaminodianthraquinone, anthrapyrimidine, flavantron, anthanthrone, indanthrone, pyranthrone, violanthrone; quinacridone pigments; dioxazine pigments; perinone pigments; perylene pigments; thioindigo pigments; Indoline pigments; isoindolinone pigments; quinophthalone pigments; selenium pigments; metal complex pigments.

Examples of the dye derivative are described in JP-A-63-305173, JP-B-57-15620, JP-B-59-40172, JP-B-63-17102, JP-B-5-9469, and the like. What is currently used can be used, These can be used individually or in mixture of 2 or more types.
The blending amount of the pigment derivative is preferably 0.5% by weight or more, more preferably 1% by weight or more, most preferably 3% by weight or more based on the total amount of the colorant (100% by weight) from the viewpoint of improving dispersibility. It is. From the viewpoint of heat resistance and light resistance, the total amount of the colorant is preferably 40% by weight or less, and most preferably 35% by weight or less, based on the total amount (100% by weight).

  The resin-type dispersant has a pigment-affinity part having a property of adsorbing to the colorant and a part compatible with the colorant carrier, and adsorbs to the colorant to disperse the colorant to the colorant carrier. It works to stabilize. Specific examples of resin-type dispersants include polycarboxylic acid esters such as polyurethane and polyacrylate, unsaturated polyamides, polycarboxylic acids, polycarboxylic acid (partial) amine salts, polycarboxylic acid ammonium salts, and polycarboxylic acid alkylamine salts. , Polysiloxane, long-chain polyaminoamide phosphate, hydroxyl group-containing polycarboxylic acid ester, modified products thereof, amides formed by reaction of poly (lower alkyleneimine) and polyester having a free carboxyl group, and salts thereof Oil-soluble dispersants such as, (meth) acrylic acid-styrene copolymer, (meth) acrylic acid- (meth) acrylic acid ester copolymer, styrene-maleic acid copolymer, polyvinyl alcohol, polyvinylpyrrolidone, etc. Resin, water-soluble polymer, polyester, modified poly Acrylate-based, ethylene oxide / propylene oxide addition compound, phosphate ester-based and the like are used, they can be used alone or in admixture of two or more, not necessarily limited thereto.

  Commercially available resin-type dispersants include Disperbyk-101, 103, 107, 108, 110, 111, 116, 130, 140, 154, 161, 162, 163, 164, 165, 166, and 170 manufactured by Big Chemie Japan. 171, 174, 180, 181, 182, 183, 184, 185, 190, 2000, 2001, 2020, 2025, 2050, 2070, 2095, 2150, 2155 or Anti-Terra-U, 203, 204, or BYK- P104, P104S, 220S, 6919, or SOLPERSE-3000, 9000, 13000, 13240, 13650, 13940, 1600 manufactured by Nihon Lubrizol Corporation, such as Lactimon, Lactimon-WS, or Bykumen. 17000, 18000, 20000, 21000, 24000, 26000, 27000, 28000, 31845, 32000, 32500, 32550, 33500, 32600, 34750, 35100, 36600, 38500, 41000, 41090, 53095, 55000, 76500, etc. EFKA-46, 47, 48, 452, 4008, 4009, 4010, 4015, 4020, 4047, 4050, 4055, 4060, 4080, 4400, 4401, 4402, 4403, 4406, 4408, 4300, 4310, manufactured by Japan 4320, 4330, 4340, 450, 451, 453, 4540, 4550, 4560, 4800, 5010, 5065, 5066, 5070, 7500, 75 4,1101,120,150,1501,1502,1503, etc., Ajinomoto Fine-Techno Co., Ltd. of AJISPER PA111, PB711, PB821, PB822, PB824, and the like.

  Surfactants include sodium lauryl sulfate, polyoxyethylene alkyl ether sulfate, sodium dodecylbenzene sulfonate, alkali salt of styrene-acrylic acid copolymer, sodium stearate, sodium alkyl naphthalene sulfonate, sodium alkyl diphenyl ether disulfonate Anionic surfactants such as lauryl sulfate monoethanolamine, lauryl sulfate triethanolamine, ammonium lauryl sulfate, monoethanolamine stearate, monoethanolamine of styrene-acrylic acid copolymer, polyoxyethylene alkyl ether phosphate; Polyoxyethylene oleyl ether, polyoxyethylene lauryl ether, polyoxyethylene nonylphenyl ether, polyoxyethylene Nonionic surfactants such as alkyl ether phosphates, polyoxyethylene sorbitan monostearate and polyethylene glycol monolaurate; chaotic surfactants such as alkyl quaternary ammonium salts and their ethylene oxide adducts; alkyldimethylamino Examples include amphoteric surfactants such as alkylbetaines such as betaine acetate and alkylimidazolines, and these may be used alone or in admixture of two or more, but are not necessarily limited thereto.

  When a resin-type dispersant and a surfactant are added, the total amount of the colorant is based on (100% by weight), preferably 0.1 to 55% by weight, more preferably 0.1 to 45% by weight. . When the blending amount of the resin-type dispersant and the surfactant is less than 0.1% by weight, it is difficult to obtain the added effect. When the blending amount is more than 55% by weight, the excess dispersant makes the stability stable. May have an effect.

  The blue coloring composition of the present invention can be used as a photosensitive coloring composition for a color filter by further adding a photopolymerizable monomer and / or a photopolymerization initiator.

<Photopolymerizable monomer>
The photopolymerizable monomer of the present invention includes monomers or oligomers that are cured by ultraviolet rays or heat to produce a resin, and these can be used alone or in combination of two or more. The amount of the monomer is preferably 5 to 400% by weight based on the total weight of the colorant (100% by weight), and more preferably 10 to 300% by weight from the viewpoint of photocurability and developability. preferable.

  Examples of monomers and oligomers that are cured by ultraviolet rays or heat to produce a resin include methyl (meth) acrylate, ethyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, Cyclohexyl (meth) acrylate, β-carboxyethyl (meth) acrylate, polyethylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, triethylene glycol di (meth) acrylate, tripropylene glycol di (meth) ) Acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, 1,6-hexanediol diglycidyl -Terdi (meth) acrylate, bisphenol A diglycidyl ether di (meth) acrylate, neopentyl glycol diglycidyl ether di (meth) acrylate, dipentaerythritol hexa (meth) acrylate, dipentaerythritol penta (meth) acrylate, tricyclodeca Nyl (meth) acrylate, ester acrylate, methylolated melamine (meth) acrylate ester, epoxy (meth) acrylate, urethane acrylate and other acrylic esters and methacrylate esters, (meth) acrylic acid, styrene, vinyl acetate, Hydroxyethyl vinyl ether, ethylene glycol divinyl ether, pentaerythritol trivinyl ether, (meth) acrylamide, N-hydroxymethyl (Meth) acrylamide, N-vinylformamide, acrylonitrile and the like can be mentioned, but are not necessarily limited thereto.

<Photopolymerization initiator>
In the blue coloring composition for color filter of the present invention, when the composition is cured by ultraviolet irradiation and a filter segment is formed by a photolithography method, a photopolymerization initiator or the like is added to a solvent developing type or an alkali developing type. It can be adjusted in the form of a colored resist material.

  Examples of the photopolymerization initiator include 4-phenoxydichloroacetophenone, 4-t-butyl-dichloroacetophenone, diethoxyacetophenone, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, 1- Hydroxycyclohexyl phenyl ketone, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one, 2- (dimethylamino) -2-[(4-methylphenyl) methyl] -1 Acetophenone compounds such as-[4- (4-morpholinyl) phenyl] -1-butanone or 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butan-1-one; benzoin, benzoin Methyl ether, benzoin ethyl ether, benzoin isopropyl ether, or ben Benzoin compounds such as rudimethyl ketal; benzophenone, benzoylbenzoic acid, methyl benzoylbenzoate, 4-phenylbenzophenone, hydroxybenzophenone, acrylated benzophenone, 4-benzoyl-4′-methyldiphenyl sulfide, or 3,3 ′, 4 Benzophenone compounds such as 4,4′-tetra (t-butylperoxycarbonyl) benzophenone; thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, isopropylthioxanthone, 2,4-diisopropylthioxanthone, 2,4-diethylthioxanthone, etc. 2,4,6-trichloro-s-triazine, 2-phenyl-4,6-bis (trichloromethyl) -s-triazine, 2- (p-methoxyphene) ) -4,6-bis (trichloromethyl) -s-triazine, 2- (p-tolyl) -4,6-bis (trichloromethyl) -s-triazine, 2-piperonyl-4,6-bis (trichloro) Methyl) -s-triazine, 2,4-bis (trichloromethyl) -6-styryl-s-triazine, 2- (naphth-1-yl) -4,6-bis (trichloromethyl) -s-triazine, 2 -(4-Methoxy-naphth-1-yl) -4,6-bis (trichloromethyl) -s-triazine, 2,4-trichloromethyl- (piperonyl) -6-triazine, or 2,4-trichloromethyl- Triazine compounds such as (4′-methoxystyryl) -6-triazine; 1,2-octanedione, 1- [4- (phenylthio)-, 2- (O-benzoyloxime)], O- (acetyl) -N- (1-phenyl-2-oxo-2- (4′-methoxy-naphthyl) ethylidene) hydroxylamine and other oxime ester compounds; bis (2,4,6-trimethylbenzoyl) Phosphine compounds such as phenylphosphine oxide or 2,4,6-trimethylbenzoyldiphenylphosphine oxide; quinone compounds such as 9,10-phenanthrenequinone, camphorquinone and ethylanthraquinone; borate compounds; carbazole compounds; An imidazole compound; or a titanocene compound or the like is used.

  These photopolymerization initiators can be used alone or in combination of two or more at any ratio as required. These photopolymerization initiators are preferably 5 to 200% by weight, based on the total amount of the colorant in the blue coloring composition for color filters (100% by weight), from the viewpoint of photocurability and developability. More preferably, it is 10 to 150% by weight.

<Sensitizer>
Furthermore, the blue coloring composition for a color filter of the present invention can contain a sensitizer.
Sensitizers include chalcone derivatives, unsaturated ketones such as dibenzalacetone, 1,2-diketone derivatives such as benzyl and camphorquinone, benzoin derivatives, fluorene derivatives, naphthoquinone derivatives, anthraquinone derivatives , Xanthene derivatives, thioxanthene derivatives, xanthone derivatives, thioxanthone derivatives, coumarin derivatives, ketocoumarin derivatives, cyanine derivatives, merocyanine derivatives, oxonol derivatives, and other polymethine dyes, acridine derivatives, azine derivatives, thiazine derivatives, oxazine derivatives, indoline derivatives, Azulene derivatives, azurenium derivatives, squarylium derivatives, porphyrin derivatives, tetraphenylporphyrin derivatives, triarylmethane derivatives, tetrabenzoporphyrin derivatives, Trapirazinoporphyrazine derivatives, phthalocyanine derivatives, tetraazaporphyrazine derivatives, tetraquinoxalyloporphyrazine derivatives, naphthalocyanine derivatives, subphthalocyanine derivatives, pyrylium derivatives, thiopyrylium derivatives, tetraphylline derivatives, annulene derivatives, spiropyran derivatives, spirooxazine Derivatives, thiospiropyran derivatives, metal arene complexes, organoruthenium complexes, or Michler's ketone derivatives, α-acyloxy esters, acylphosphine oxides, methylphenylglyoxylate, benzyl, 9,10-phenanthrenequinone, camphorquinone, ethyl Anthraquinone, 4,4'-diethylisophthalophenone, 3,3 ', or 4,4'-tetra (t-butylperoxycarbonyl) benzopheno And 4,4′-diethylaminobenzophenone.

  More specifically, edited by Shin Okawara et al., “Dye Handbook” (1986, Kodansha), edited by Shin Okawara et al., “Chemistry of Functional Dye” (1981, CMC), edited by Tadasaburo Ikemori et al. Examples include, but are not limited to, sensitizers described in "Special Functional Materials" (1986, CMC). In addition, a sensitizer that absorbs light from the ultraviolet region to the near infrared region can also be contained.

  Two or more kinds of sensitizers may be used in any ratio as required. The blending amount when using the sensitizer is preferably 3 to 60% by weight based on the total weight of the photopolymerization initiator contained in the colored composition (100% by weight). From the viewpoint of developability, it is more preferably 5 to 50% by weight.

<Amine compound>
Moreover, the coloring composition for color filters of this invention can be made to contain the amine compound which has a function which reduces the dissolved oxygen.

  Such amine compounds include triethanolamine, methyldiethanolamine, triisopropanolamine, methyl 4-dimethylaminobenzoate, ethyl 4-dimethylaminobenzoate, isoamyl 4-dimethylaminobenzoate, 2-dimethylaminobenzoate. Examples include ethyl, 2-ethylhexyl 4-dimethylaminobenzoate, and N, N-dimethylparatoluidine.

<Leveling agent>
In order to improve the leveling property of the composition on the transparent substrate, it is preferable to add a leveling agent to the colored composition of the present invention. As the leveling agent, dimethylsiloxane having a polyether structure or a polyester structure in the main chain is preferable. Specific examples of dimethylsiloxane having a polyether structure in the main chain include FZ-2122 manufactured by Toray Dow Corning, BYK-333 manufactured by Big Chemie. Specific examples of dimethylsiloxane having a polyester structure in the main chain include BYK-310 and BYK-370 manufactured by BYK Chemie. Dimethylsiloxane having a polyether structure in the main chain and dimethylsiloxane having a polyester structure in the main chain can be used in combination. In general, the leveling agent content is preferably 0.003 to 0.5% by weight based on the total weight of the coloring composition (100% by weight).

  As a particularly preferred leveling agent, it is a kind of so-called surfactant having a hydrophobic group and a hydrophilic group in the molecule, has a hydrophilic group but has low solubility in water, and when added to a blue coloring composition, It has the feature that its surface tension lowering ability is low, and it is useful to have good wettability to the glass plate despite its low surface tension lowering ability, and the added amount that does not cause coating film defects due to foaming In this case, those that can sufficiently suppress the chargeability can be preferably used. As a leveling agent having such preferable characteristics, dimethylpolysiloxane having a polyalkylene oxide unit can be preferably used. Examples of the polyalkylene oxide unit include a polyethylene oxide unit and a polypropylene oxide unit, and dimethylpolysiloxane may have both a polyethylene oxide unit and a polypropylene oxide unit.

  In addition, the bonding form of the polyalkylene oxide unit with dimethylpolysiloxane includes a pendant type in which the polyalkylene oxide unit is bonded in the repeating unit of dimethylpolysiloxane, a terminal-modified type in which the end of dimethylpolysiloxane is bonded, and dimethylpolysiloxane. Any of linear block copolymer types in which they are alternately and repeatedly bonded may be used. Dimethylpolysiloxane having a polyalkylene oxide unit is commercially available from Toray Dow Corning Co., Ltd., for example, FZ-2110, FZ-2122, FZ-2130, FZ-2166, FZ-2191, FZ-2203, FZ. -2207, but is not limited thereto.

An anionic, cationic, nonionic or amphoteric surfactant can be supplementarily added to the leveling agent. Two or more kinds of surfactants may be mixed and used.
Anionic surfactants added to the leveling agent as auxiliary agents include polyoxyethylene alkyl ether sulfate, sodium dodecylbenzene sulfonate, alkali salt of styrene-acrylic acid copolymer, sodium alkyl naphthalene sulfonate, alkyl diphenyl ether disulfonic acid Sodium, lauryl sulfate monoethanolamine, lauryl sulfate triethanolamine, ammonium lauryl sulfate, monoethanolamine stearate, sodium stearate, sodium lauryl sulfate, monoethanolamine of styrene-acrylic acid copolymer, polyoxyethylene alkyl ether phosphate Examples include esters.

  Examples of the chaotic surfactant that is supplementarily added to the leveling agent include alkyl quaternary ammonium salts and their ethylene oxide adducts. Nonionic surfactants added to the leveling agent as auxiliary agents include polyoxyethylene oleyl ether, polyoxyethylene lauryl ether, polyoxyethylene nonylphenyl ether, polyoxyethylene alkyl ether phosphate ester, polyoxyethylene sorbitan monostearate And amphoteric surfactants such as alkyl dimethylamino acetic acid betaine and alkylimidazolines, and fluorine-based and silicone-based surfactants.

<Curing agent, curing accelerator>
Moreover, in order to assist hardening of a thermosetting resin, the coloring composition of this invention may contain the hardening | curing agent, the hardening accelerator, etc. as needed. As the curing agent, phenolic resins, amine compounds, acid anhydrides, active esters, carboxylic acid compounds, sulfonic acid compounds and the like are effective, but are not particularly limited to these, and thermosetting resins. Any curing agent may be used as long as it can react with the. Among these, a compound having two or more phenolic hydroxyl groups in one molecule and an amine curing agent are preferable. Examples of the curing accelerator include amine compounds (for example, dicyandiamide, benzyldimethylamine, 4- (dimethylamino) -N, N-dimethylbenzylamine, 4-methoxy-N, N-dimethylbenzylamine, 4-methyl). -N, N-dimethylbenzylamine etc.), quaternary ammonium salt compounds (eg triethylbenzylammonium chloride etc.), blocked isocyanate compounds (eg dimethylamine etc.), imidazole derivative bicyclic amidine compounds and salts thereof (eg Imidazole, 2-methylimidazole, 2-ethylimidazole, 2-ethyl-4-methylimidazole, 2-phenylimidazole, 4-phenylimidazole, 1-cyanoethyl-2-phenylimidazole, 1- (2-cyanoethyl) -2- D Ru-4-methylimidazole, etc.), phosphorus compounds (eg, triphenylphosphine, etc.), guanamine compounds (eg, melamine, guanamine, acetoguanamine, benzoguanamine, etc.), S-triazine derivatives (eg, 2,4-diamino-6) -Methacryloyloxyethyl-S-triazine, 2-vinyl-2,4-diamino-S-triazine, 2-vinyl-4,6-diamino-S-triazine isocyanuric acid adduct, 2,4-diamino-6 Methacryloyloxyethyl-S-triazine / isocyanuric acid adduct, etc.) can be used. These may be used alone or in combination of two or more. The content of the curing accelerator is preferably 0.01 to 15% by weight based on the total amount of the thermosetting resin (100% by weight).

<Other additive components>
The blue colored composition of the present invention can contain a storage stabilizer in order to stabilize the viscosity of the composition with time. Moreover, in order to improve adhesiveness with a transparent substrate, adhesion improving agents, such as a silane coupling agent, can also be contained.

  Examples of the storage stabilizer include (quaternary ammonium chlorides such as benzyltrimethyl chloride and diethylhydroxyamine), organic acids such as lactic acid and oxalic acid, and methyl ethers thereof, t-butylpyrocatechol, tetraethylphosphine, tetraphenylphosphine. And organic phosphines, phosphites and the like. The storage stabilizer can be used in an amount of 0.1 to 10% by weight based on the total amount of the colorant (100% by weight).

  Examples of the adhesion improver include vinyl silanes such as vinyltris (β-methoxyethoxy) silane, vinylethoxysilane and vinyltrimethoxysilane, (meth) acrylsilanes such as γ-methacryloxypropyltrimethoxysilane, β- (3, 4-epoxycyclohexyl) ethyltrimethoxysilane, β- (3,4-epoxycyclohexyl) methyltrimethoxysilane, β- (3,4-epoxycyclohexyl) ethyltriethoxysilane, β- (3,4-epoxycyclohexyl) Epoxysilanes such as methyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, N-β (aminoethyl) γ-aminopropyltrimethoxysilane, N-β (amino Ethyl) γ-aminopropyltrie Xisilane, N-β (aminoethyl) γ-aminopropylmethyldiethoxysilane, γ-aminopropyltriethoxysilane, γ-aminopropyltrimethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, N-phenyl Examples include silane coupling agents such as aminosilanes such as -γ-aminopropyltriethoxysilane, and thiosilanes such as γ-mercaptopropyltrimethoxysilane and γ-mercaptopropyltriethoxysilane. The adhesion improver can be used in an amount of 0.01 to 10% by weight, preferably 0.05 to 5% by weight, based on the total amount of the colorant in the coloring composition (100% by weight).

<Removal of coarse particles>
The coloring composition of the present invention is mixed with coarse particles of 5 μm or more, preferably coarse particles of 1 μm or more, more preferably 0.5 μm or more and coarse particles by means of centrifugation, sintered filter, membrane filter or the like. It is preferable to remove dust. Thus, it is preferable that a blue coloring composition does not contain a particle | grain of 0.5 micrometer or more substantially. More preferably, it is 0.3 μm or less.

<Color filter>
Next, the color filter of the present invention will be described. The color filter of the present invention comprises at least one red filter segment, at least one green filter segment, and at least one blue filter segment, and the at least one blue filter segment is a blue coloring composition for the color filter of the present invention. It is formed using.

  The red filter segment can be formed using a normal red coloring composition comprising a red pigment and a colorant carrier. Examples of the red coloring composition include C.I. I. Pigment Red 7, 14, 41, 48: 1, 48: 2, 48: 3, 48: 4, 57: 1, 81, 81: 1, 81: 2, 81: 3, 81: 4, 122, 146, 168, 169, 177, 178, 184, 185, 187, 200, 202, 208, 210, 242, 246, 254, 255, 264, 270, 272, 273, 274, 276, 277, 278, 279, 280, Red pigments such as 281, 282, 283, 284, 285, 286, or 287 are used. Further, a basic dye or a salt-forming compound of an acid dye exhibiting a red color can also be used.

  The red coloring composition includes C.I. I. Pigment orange 43, 71, 73 or the like and / or C.I. I. Pigment Yellow 1, 2, 3, 4, 5, 6, 10, 12, 13, 14, 15, 16, 17, 18, 24, 31, 32, 34, 35, 35: 1, 36, 36: 1, 37, 37: 1, 40, 42, 43, 53, 55, 60, 61, 62, 63, 65, 73, 74, 77, 81, 83, 93, 94, 95, 97, 98, 100, 101, 104, 106, 108, 109, 110, 113, 114, 115, 116, 117, 118, 119, 120, 123, 126, 127, 128, 129, 138, 139, 147, 150, 151, 152, 153, 154, 155, 156, 161, 162, 164, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 179, 180, 181 182,185,187,188,193,194,198,199,213,214,218,219,220, or may be used in combination of a yellow pigment 221, and the like. In addition, a salt forming compound of a basic dye or an acid dye that exhibits orange and / or yellow can be used.

  The green filter segment can be formed using a conventional green coloring composition comprising a green pigment and a colorant carrier. Examples of the green pigment include C.I. I. Pigment Green 7, 10, 36, 37, 58, etc. are used.

  A yellow pigment can be used in combination with the green coloring composition. Examples of yellow pigments that can be used in combination include C.I. I. Pigment Yellow 1, 2, 3, 4, 5, 6, 10, 12, 13, 14, 15, 16, 17, 18, 24, 31, 32, 34, 35, 35: 1, 36, 36: 1, 37, 37: 1, 40, 42, 43, 53, 55, 60, 61, 62, 63, 65, 73, 74, 77, 81, 83, 93, 94, 95, 97, 98, 100, 101, 104, 106, 108, 109, 110, 113, 114, 115, 116, 117, 118, 119, 120, 123, 126, 127, 128, 129, 138, 139, 147, 150, 151, 152, 153, 154, 155, 156, 161, 162, 164, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 179, 180, 181, Mention may be made of yellow pigments such as 182, 185, 187, 188, 193, 194, 198, 199, 213, 214, 218, 219, 220 or 221. Further, a basic dye exhibiting yellow and a salt-forming compound of an acid dye can be used in combination.

<Color filter manufacturing method>
The color filter of the present invention can be produced by a printing method or a photolithography method.

  The formation of the filter segment by the printing method can be patterned simply by repeating the printing and drying of the coloring composition prepared as the printing ink. Therefore, the color filter manufacturing method is low in cost and excellent in mass productivity. Furthermore, it is possible to print a fine pattern having high dimensional accuracy and smoothness by the development of printing technology. In order to perform printing, it is preferable that the ink does not dry and solidify on the printing plate or on the blanket. Control of ink fluidity on a printing press is also important, and ink viscosity can be adjusted with a dispersant or extender pigment.

  When the filter segment is formed by photolithography, the colored composition prepared as a solvent developing type or alkali developing type colored resist material is applied on a transparent substrate by spray coating, spin coating, slit coating, roll coating or the like. By a method, it applies so that a dry film thickness may be set to 0.2-5 micrometers. If necessary, the dried film is exposed to ultraviolet light through a mask having a predetermined pattern provided in contact with or non-contact with the film. Then, after immersing in a solvent or alkali developer or spraying the developer by spraying or the like to remove the uncured portion to form a desired pattern, the same operation is repeated for other colors to produce a color filter. be able to. Furthermore, in order to accelerate the polymerization of the colored resist material, heating can be performed as necessary. According to the photolithography method, a color filter with higher accuracy than the above printing method can be manufactured.

In development, an aqueous solution such as sodium carbonate or sodium hydroxide is used as an alkali developer, and an organic alkali such as dimethylbenzylamine or triethanolamine can also be used. Moreover, an antifoamer and surfactant can also be added to a developing solution.
In order to increase the UV exposure sensitivity, after coating and drying the colored resist material, a water-soluble or alkaline water-soluble resin such as polyvinyl alcohol or water-soluble acrylic resin is applied and dried to form a film that prevents polymerization inhibition by oxygen. Then, ultraviolet exposure can be performed.

The color filter of the present invention can be produced by an electrodeposition method, a transfer method, etc. in addition to the above method, but the colored composition of the present invention can be used in any method. The electrodeposition method is a method for producing a color filter by using a transparent conductive film formed on a substrate and forming each color filter segment on the transparent conductive film by electrophoresis of colloidal particles. .
The transfer method is a method in which a filter segment is formed in advance on the surface of a peelable transfer base sheet, and this filter segment is transferred to a desired substrate.

  A black matrix can be formed in advance before forming each color filter segment on a transparent substrate or a reflective substrate. As the black matrix, a chromium, chromium / chromium oxide multilayer film, an inorganic film such as titanium nitride, or a resin film in which a light-shielding agent is dispersed is used, but is not limited thereto. In addition, a thin film transistor (TFT) may be formed in advance on the transparent substrate or the reflective substrate, and then each color filter segment may be formed. In addition, an overcoat film, a transparent conductive film, or the like is formed on the color filter of the present invention as necessary.

Hereinafter, the present invention will be described based on examples, but the present invention is not limited thereto. Unless otherwise specified, “parts” means “parts by weight”.
The weight average molecular weight (Mw) of the resin was measured by using TSKgel column (manufactured by Tosoh Corporation) and GPC equipped with an RI detector (manufactured by Tosoh Corporation, HLC-8120GPC) using polystyrene as a developing solvent. It is a weight average molecular weight (Mw) in terms of conversion.
Moreover, the fineness of the pigment was evaluated by the specific surface area of the pigment particles. The specific surface area was measured by an automatic vapor adsorption amount measuring apparatus (“BELSORP18” manufactured by Nippon Bell Co., Ltd.) by the BET method of nitrogen adsorption.

  Prior to Examples, acrylic resin solutions, refined pigments, salt-forming compounds (A), other salt-forming compounds (C), pigment dispersions, red resist materials, and green resist materials used in Examples and Comparative Examples A method will be described.

<Method for producing acrylic resin solutions 1 to 4>
(Preparation of acrylic resin solution 1)
A reaction vessel equipped with a separable four-necked flask equipped with a thermometer, a cooling tube, a nitrogen gas introduction tube, and a stirrer was charged with 70.0 parts of cyclohexanone, heated to 80 ° C., and the inside of the reaction vessel was purged with nitrogen. 13.3 parts of n-butyl methacrylate, 4.6 parts of 2-hydroxyethyl methacrylate, 4.3 parts of methacrylic acid, 7.4 parts of paracumylphenol ethylene oxide modified acrylate (“Aronix M110” manufactured by Toagosei Co., Ltd.), A mixture of 0.4 part of 2,2′-azobisisobutyronitrile was added dropwise over 2 hours. After completion of the dropwise addition, the reaction was continued for 3 hours to obtain an acrylic resin solution having a weight average molecular weight (Mw) of 26000. After cooling to room temperature, about 2 g of the resin solution was sampled, heated and dried at 180 ° C. for 20 minutes to measure the nonvolatile content, and cyclohexanone was added to the previously synthesized resin solution so that the nonvolatile content was 20% by weight. Thus, an acrylic resin solution 1 was prepared.

(Preparation of acrylic resin solution 2)
207 parts of cyclohexanone was charged into a separable four-necked flask equipped with a thermometer, a cooling pipe, a nitrogen gas introduction pipe, a dropping pipe, and a stirring device, heated to 80 ° C., and the flask was purged with nitrogen. 20 parts of acid, 20 parts of paracumylphenol ethylene oxide modified acrylate (Aronix M110 manufactured by Toa Gosei Co., Ltd.), 45 parts of methyl methacrylate, 8.5 parts of 2-hydroxyethyl methacrylate, and 2,2′-azobisisobutyronitrile 1.33 parts of the mixture was added dropwise over 2 hours. After completion of the dropwise addition, the reaction was further continued for 3 hours to obtain a copolymer resin solution.
Next, after the nitrogen gas was stopped and stirred while injecting dry air for 1 hour with respect to the total amount of the copolymer solution obtained, the mixture was cooled to room temperature, and then 2-methacryloyloxyethyl isocyanate (Karenz manufactured by Showa Denko KK). MOI) A mixture of 6.5 parts, 0.08 part dibutyltin laurate and 26 parts cyclohexanone was added dropwise at 70 ° C. over 3 hours.
About 2 g of resin solution was sampled and heated and dried at 180 ° C. for 20 minutes to measure the non-volatile content. Then, cyclohexanone was added to the previously synthesized resin solution so that the non-volatile content was 20% by weight, and the acrylic resin solution 2 was obtained. Prepared. The weight average molecular weight (Mw) was 18000.

(Preparation of acrylic resin solution 3)
207 parts of cyclohexanone was charged into a separable four-necked flask equipped with a thermometer, a cooling pipe, a nitrogen gas introduction pipe, a dropping pipe, and a stirring device, heated to 80 ° C., and the flask was purged with nitrogen. 20 parts of acid, 20 parts of paracumylphenol ethylene oxide modified acrylate (Aronix M110 manufactured by Toagosei Co., Ltd.), 45 parts of methyl methacrylate, 8.5 parts of glycerol monomethacrylate, and 1.33 of 2,2′-azobisisobutyronitrile Part of the mixture was added dropwise over 2 hours. After completion of the dropwise addition, the reaction was further continued for 3 hours to obtain a copolymer resin solution.
Next, after the nitrogen gas was stopped and stirred while injecting dry air for 1 hour with respect to the total amount of the copolymer solution obtained, after cooling to room temperature, 6.5 parts of 2-methacryloyloxyl ethyl isocyanate, A mixture of 0.08 part dibutyltin laurate and 26 parts cyclohexanone was added dropwise at 70 ° C. over 3 hours.
About 2 g of the resin solution was sampled and heated and dried at 180 ° C. for 20 minutes to measure the non-volatile content. Then, cyclohexanone was added to the previously synthesized resin solution so that the non-volatile content was 20% by weight, and the acrylic resin solution 3 was obtained. Prepared. The weight average molecular weight (Mw) was 19000.

(Preparation of acrylic resin solution 4)
A separable four-necked flask equipped with a thermometer, a cooling pipe, a nitrogen gas introduction pipe, a dropping pipe and a stirring device was charged with 370 parts of cyclohexanone, heated to 80 ° C., and the atmosphere in the flask was replaced with nitrogen. 18 parts of milphenol ethylene oxide modified acrylate (Aronix M110 manufactured by Toagosei Co., Ltd.), 10 parts of benzyl methacrylate, 18.2 parts of glycidyl methacrylate, 25 parts of methyl methacrylate, and 2,2′-azobisisobutyronitrile 2.0 Part of the mixture was added dropwise over 2 hours. After dropping, the reaction was further carried out at 100 ° C. for 3 hours, and then 1.0 part of azobisisobutyronitrile dissolved in 50 parts of cyclohexanone was added, and the reaction was further continued at 100 ° C. for 1 hour. Next, the inside of the container is replaced with air, and 0.5 part of trisdimethylaminophenol and 0.1 part of hydroquinone are put into 9.3 parts of acrylic acid (100% of glycidyl group) and the container is placed at 120 ° C. The reaction was continued for 6 hours, and when the acid value of the solid content reached 0.5, the reaction was terminated to obtain an acrylic resin solution. Further, 19.5 parts of tetrahydrophthalic anhydride (100% of the generated hydroxyl group) and 0.5 parts of triethylamine were added and reacted at 120 ° C. for 3.5 hours to obtain an acrylic resin solution.
After cooling to room temperature, about 2 g of the resin solution was sampled, heated and dried at 180 ° C. for 20 minutes to measure the nonvolatile content, and cyclohexanone was added to the previously synthesized resin solution so that the nonvolatile content was 20% by weight. Thus, an acrylic resin solution 4 was prepared. The weight average molecular weight (Mw) was 19000.

<Production method of fine pigment>
(Preparation of blue fine pigment 1)
Phthalocyanine blue pigment C.I. I. Pigment Blue 15: 6 (“LIONOL BLUE ES” manufactured by Toyo Ink Co., Ltd., specific surface area 60 m ² / g), 200 parts of sodium chloride, 1400 parts of sodium chloride, and 360 parts of diethylene glycol were charged into a 1 gallon kneader (manufactured by Inoue Seisakusho). And kneading at 80 ° C. for 6 hours. Next, the kneaded product is poured into 8 liters of warm water, stirred for 2 hours while heating to 80 ° C. to form a slurry, filtered and washed repeatedly to remove sodium chloride and diethylene glycol, and then dried at 85 ° C. overnight. 190 parts of blue fine pigment 1 were obtained. The specific surface area of the blue fine pigment 1 was 80 m ² / g.

(Preparation of blue fine pigment 2)
Triphenylmethane blue pigment C.I. I. 200 parts of Pigment Blue 1 (“Fanal Blue D 6340” manufactured by BASF), 1400 parts of sodium chloride, and 360 parts of diethylene glycol were charged into a stainless gallon kneader (manufactured by Inoue Seisakusho) and kneaded at 80 ° C. for 6 hours. Next, the kneaded product is poured into 8 liters of warm water, stirred for 2 hours while heating to 80 ° C. to form a slurry, filtered and washed repeatedly to remove sodium chloride and diethylene glycol, and then dried at 85 ° C. overnight. 190 parts of blue fine pigment 2 were obtained. The specific surface area of the blue fine pigment 2 was 65 m ² / g.

(Preparation of purple fine pigment 1)
Dioxazine-based purple pigment C.I. I. 200 parts of Pigment Violet 23 (“LIONOGEN VIOLET RL” manufactured by Toyo Ink Manufacturing Co., Ltd.), 1400 parts of sodium chloride, and 360 parts of diethylene glycol were charged into a 1 gallon kneader (manufactured by Inoue Seisakusho) and kneaded at 80 ° C. for 6 hours. Next, the kneaded product is poured into 8 liters of warm water, stirred for 2 hours while heating to 80 ° C. to form a slurry, filtered and washed repeatedly to remove sodium chloride and diethylene glycol, and then dried at 85 ° C. overnight. 190 parts of purple fine pigment 1 were obtained. The specific surface area of the purple fine pigment 1 was 95 m ² / g.

(Preparation of red fine pigment 1)
Diketopyrrolopyrrole red pigment C.I. I. 200 parts of Pigment Red 254 (“IRGAZIN RED 2030” manufactured by Ciba Japan), 1400 parts of sodium chloride, and 360 parts of diethylene glycol were charged into a 1 gallon kneader (manufactured by Inoue Seisakusho) and kneaded at 80 ° C. for 6 hours. Next, this kneaded product is put into 8 liters of warm water, stirred for 2 hours while heating to 80 ° C. to form a slurry, filtered and washed repeatedly to remove sodium chloride and diethylene glycol, and then dried at 85 ° C. overnight. 190 parts of red fine pigment 1 were obtained. The specific surface area of the red fine pigment 1 was 70 m ² / g.

(Preparation of yellow fine pigment 1)
Isoindoline yellow pigment C.I. I. Pigment Yellow 139 (“Irgafore Yellow 2R-CF” manufactured by Ciba Japan), 500 parts of sodium chloride, and 250 parts of diethylene glycol were charged into a stainless steel 1 gallon kneader (manufactured by Inoue Seisakusho) and kneaded at 120 ° C. for 8 hours. did. Next, the kneaded product is poured into 5 liters of warm water, stirred for 1 hour while heating to 70 ° C. to form a slurry, filtered and washed repeatedly to remove sodium chloride and diethylene glycol, and then dried at 80 ° C. overnight. 490 parts of yellow fine pigment 1 were obtained. The specific surface area of the yellow fine pigment 1 was 70 m ² / g.

(Preparation of green fine pigment 1)
Phthalocyanine green pigment C.I. I. 200 parts of Pigment Green 36 (“Lionol Green 6YK” manufactured by Toyo Ink Manufacturing Co., Ltd.), 1400 parts of sodium chloride, and 360 parts of diethylene glycol were charged into a 1 gallon kneader (manufactured by Inoue Seisakusho) and kneaded at 80 ° C. for 6 hours. . Next, this kneaded product is put into 8 liters of warm water, stirred for 2 hours while heating to 80 ° C. to form a slurry, filtered and washed repeatedly to remove sodium chloride and diethylene glycol, and then dried at 85 ° C. overnight. 190 parts of green fine pigment 1 were obtained. The specific surface area of the green fine pigment 1 was 75 m ² / g.

(Preparation of yellow fine pigment 2)
Nickel complex yellow pigment C.I. I. 200 parts of Pigment Yellow 150 (“E-4GN” manufactured by LANXESS), 1400 parts of sodium chloride, and 360 parts of diethylene glycol were charged into a stainless gallon kneader (manufactured by Inoue Seisakusho) and kneaded at 80 ° C. for 6 hours. Next, this kneaded product is put into 8 liters of warm water, stirred for 2 hours while heating to 80 ° C. to form a slurry, filtered and washed repeatedly to remove sodium chloride and diethylene glycol, and then dried at 85 ° C. overnight. 190 parts of yellow fine pigment 2 were obtained. The specific surface area of the yellow fine pigment 2 was 65 m ² / g.

<Method for Producing Salt-Forming Compound (A)>
(Salt-forming compound (A-1))
In the following procedure, C.I. I. A salt-forming compound (A-1) composed of Acid Blue 112 and distearyldimethylammonium chloride (Cotamine D86P) (the molecular weight of the cation moiety was 550) was produced.
In a 7-15 mol% sodium hydroxide solution, C.I. I. Acid Blue 112 is dissolved, sufficiently mixed and stirred, heated to 70 to 90 ° C., and then Cotamine D86P is added dropwise little by little. Coatamine D86P may be dissolved in water and used as an aqueous solution. After adding Cotamine D86P dropwise, the mixture is stirred at 70 to 90 ° C. for 60 minutes to sufficiently react. In order to confirm the end point of the reaction, it can be judged that the salt-forming compound was obtained with the reaction solution dropped on the filter paper and the point where the bleeding disappeared as the end point. After cooling to room temperature with stirring, suction filtration is performed, and after washing with water, the salt-forming compound remaining on the filter paper is dried by removing moisture with a dryer. I. A salt-forming compound of acid blue 112 and distearyldimethylammonium chloride, a salt-forming compound (A-1) was obtained.

(Salt-forming compound (A-2))
In the following procedure, C.I. I. A salt-forming compound (A-2) composed of Acid Blue 112 and dilauryldimethylammonium chloride (the molecular weight of the cation moiety was 382) was produced.
In a 7-15 mol% sodium hydroxide solution, C.I. I. Acid Blue 112 is dissolved and sufficiently mixed and stirred. After heating to 70 to 90 ° C., dilauryldimethylammonium chloride is added dropwise little by little. Dilauryldimethylammonium chloride may be dissolved in water and used as an aqueous solution. After dropwise addition of dilauryldimethylammonium chloride, the mixture is stirred at 70 to 90 ° C. for 60 minutes and sufficiently reacted. In order to confirm the end point of the reaction, it can be judged that the salt-forming compound was obtained with the reaction solution dropped on the filter paper and the point where the bleeding disappeared as the end point. After cooling to room temperature with stirring, suction filtration is performed, and after washing with water, the salt-forming compound remaining on the filter paper is dried by removing moisture with a dryer. I. A salt-forming compound of acid blue 112 and dilauryldimethylammonium chloride, a salt-forming compound (A-2) was obtained.

(Salt-forming compound (A-3))
In the following procedure, C.I. I. A salt-forming compound (A-3) composed of Acid Blue 112 and tristearyl monomethylammonium chloride (the molecular weight of the cation moiety was 788) was produced.
In a 7-15 mol% sodium hydroxide solution, C.I. I. Acid Blue 112 is dissolved, sufficiently mixed and stirred, heated to 70 to 90 ° C., and then tristearyl monomethyl ammonium chloride is added dropwise little by little. Tristearyl monomethylammonium chloride may be dissolved in water and used as an aqueous solution. After dropwise addition of tristearyl monomethylammonium chloride, the mixture is stirred at 70 to 90 ° C. for 60 minutes and sufficiently reacted. In order to confirm the end point of the reaction, it can be judged that the salt-forming compound was obtained with the reaction solution dropped on the filter paper and the point where the bleeding disappeared as the end point. After cooling to room temperature with stirring, suction filtration is performed, and after washing with water, the salt-forming compound remaining on the filter paper is dried by removing moisture with a dryer. I. A salt-forming compound of Acid Blue 112 and tristearyl monomethylammonium chloride, a salt-forming compound (A-3) was obtained.

(Salt-forming compound (A-4))
In the following procedure, C.I. I. Acid Blue 112 with a dialkyl (alkyl C ₁₄ -C ₁₈₎ was prepared dimethyl ammonium chloride (Arquad 2HT-75) salt-forming compound consisting (molecular weight of the cationic portion is 438 to 550) and (A-4).
In a 7-15 mol% sodium hydroxide solution, C.I. I. Acid Blue 112 is dissolved, mixed and stirred sufficiently, heated to 70-90 ° C., and then Arcard 2HT-75 is added dropwise little by little. Arcade 2HT-75 may be dissolved in water and used as an aqueous solution. After dripping Arcade 2HT-75, the mixture is stirred at 70 to 90 ° C. for 60 minutes to sufficiently react. In order to confirm the end point of the reaction, it can be judged that the salt-forming compound was obtained with the reaction solution dropped on the filter paper and the point where the bleeding disappeared as the end point. After cooling to room temperature with stirring, suction filtration is performed, and after washing with water, the salt-forming compound remaining on the filter paper is dried by removing moisture with a dryer. I. Acid Blue 112 with a dialkyl (alkyl C ₁₄ -C ₁₈₎ salification compound with dimethyl ammonium chloride, to give salt formation compound (A-4).

(Salt-forming compound (A-5))
In the following procedure, C.I. I. A salt-forming compound (A-5) composed of Acid Blue 112 and monolauryltrimethylammonium chloride (the molecular weight of the cation moiety was 228) was produced.
In a 7-15 mol% sodium hydroxide solution, C.I. I. Acid Blue 112 is dissolved and sufficiently mixed and stirred, heated to 70 to 90 ° C., and monolauryltrimethylammonium chloride is then added dropwise little by little. Monolauryltrimethylammonium chloride may be dissolved in water and used as an aqueous solution. After dropwise addition of monolauryltrimethylammonium chloride, the mixture is stirred at 70 to 90 ° C. for 60 minutes and sufficiently reacted. In order to confirm the end point of the reaction, it can be judged that the salt-forming compound was obtained with the reaction solution dropped on the filter paper and the point where the bleeding disappeared as the end point. After cooling to room temperature with stirring, suction filtration is performed, and after washing with water, the salt-forming compound remaining on the filter paper is dried by removing moisture with a dryer. I. A salt-forming compound of acid blue 112 and monolauryltrimethylammonium chloride, a salt-forming compound (A-5) was obtained.

(Salt-forming compound (A-6))
In the following procedure, C.I. I. A salt-forming compound (A-6) consisting of Acid Blue 112 and tetraethylammonium chloride (the molecular weight of the cation moiety was 122) was produced.
In a 7-15 mol% sodium hydroxide solution, C.I. I. Acid Blue 112 is dissolved and sufficiently mixed and stirred. After heating to 70 to 90 ° C., tetraethylammonium chloride is added dropwise little by little. Tetraethylammonium chloride may be dissolved in water and used as an aqueous solution. After dropwise addition of tetraethylammonium chloride, the mixture is stirred at 70 to 90 ° C. for 60 minutes to sufficiently react. In order to confirm the end point of the reaction, it can be judged that the salt-forming compound was obtained with the reaction solution dropped on the filter paper and the point where the bleeding disappeared as the end point. After cooling to room temperature with stirring, suction filtration is performed, and after washing with water, the salt-forming compound remaining on the filter paper is dried by removing moisture with a dryer. I. A salt-forming compound of acid blue 112 and tetraethylammonium chloride, a salt-forming compound (A-6) was obtained.

(Salt-forming compound (A-7))
In the following procedure, C.I. I. A salt-forming compound (A-7) composed of Acid Blue 140 and distearyldimethylammonium chloride (Cotamine D86P) (the molecular weight of the cation moiety was 550) was produced.
In a 7-15 mol% sodium hydroxide solution, C.I. I. Acid Blue 140 is dissolved and mixed and stirred thoroughly, heated to 70 to 90 ° C., and then Cotamine D86P is added dropwise little by little. Coatamine D86P may be dissolved in water and used as an aqueous solution. After adding Cotamine D86P dropwise, the mixture is stirred at 70 to 90 ° C. for 60 minutes to sufficiently react. In order to confirm the end point of the reaction, it can be judged that the salt-forming compound was obtained with the reaction solution dropped on the filter paper and the point where the bleeding disappeared as the end point. After cooling to room temperature with stirring, suction filtration is performed, and after washing with water, the salt-forming compound remaining on the filter paper is dried by removing moisture with a dryer. I. A salt-forming compound of acid blue 140 and distearyldimethylammonium chloride, a salt-forming compound (A-7) was obtained.

(Salt-forming compound (A-8))
In the following procedure, C.I. I. Acid Blue 140 with a dialkyl (alkyl C ₁₄ -C ₁₈₎ was prepared dimethyl ammonium chloride (Arquad 2HT-75) salt-forming compound consisting (molecular weight of the cationic portion is 438 to 550) and (A-8).
In a 7-15 mol% sodium hydroxide solution, C.I. I. Acid Blue 140 is dissolved, sufficiently mixed and stirred, heated to 70 to 90 ° C., and then Arcard 2HT-75 is added dropwise little by little. Arcade 2HT-75 may be dissolved in water and used as an aqueous solution. After dripping Arcade 2HT-75, the mixture is stirred at 70 to 90 ° C. for 60 minutes to sufficiently react. In order to confirm the end point of the reaction, it can be judged that the salt-forming compound was obtained with the reaction solution dropped on the filter paper and the point where the bleeding disappeared as the end point. After cooling to room temperature with stirring, suction filtration is performed, and after washing with water, the salt-forming compound remaining on the filter paper is dried by removing moisture with a dryer. I. Acid Blue 140 with a dialkyl (alkyl C ₁₄ -C ₁₈₎ salification compound with dimethyl ammonium chloride, to give salt formation compound (A-8).

(Salt-forming compound (A-9))
In the following procedure, C.I. I. Acid Blue 27 and dialkyl (alkyl C ₁₄ -C ₁₈₎ was prepared dimethyl ammonium chloride (Arquad 2HT-75) salt-forming compound consisting (molecular weight of the cationic portion is 438 to 550) and (A-9).
In a 7-15 mol% sodium hydroxide solution, C.I. I. Acid Blue 27 is dissolved, sufficiently mixed and stirred, heated to 70 to 90 ° C., and then Arcard 2HT-75 is added dropwise little by little. Arcade 2HT-75 may be dissolved in water and used as an aqueous solution. After dripping Arcade 2HT-75, the mixture is stirred at 70 to 90 ° C. for 60 minutes to sufficiently react. In order to confirm the end point of the reaction, it can be judged that the salt-forming compound was obtained with the reaction solution dropped on the filter paper and the point where the bleeding disappeared as the end point. After cooling to room temperature with stirring, suction filtration is performed, and after washing with water, the salt-forming compound remaining on the filter paper is dried by removing moisture with a dryer. I. Acid Blue 27 and dialkyl (alkyl C ₁₄ -C ₁₈₎ salification compound with dimethyl ammonium chloride, to give salt formation Compound (A-9).

(Salt-forming compound (A-10))
In the following procedure, C.I. I. A salt-forming compound (A-10) consisting of Acid Blue 62 and distearyldimethylammonium chloride (Coatamine D86P) (the molecular weight of the cation moiety was 550) was produced.
In a 7-15 mol% sodium hydroxide solution, C.I. I. Acid Blue 62 is dissolved, sufficiently mixed and stirred, heated to 70 to 90 ° C., and then Cotamine D86P is added dropwise little by little. Coatamine D86P may be dissolved in water and used as an aqueous solution. After adding Cotamine D86P dropwise, the mixture is stirred at 70 to 90 ° C. for 60 minutes to sufficiently react. In order to confirm the end point of the reaction, it can be judged that the salt-forming compound was obtained with the reaction solution dropped on the filter paper and the point where the bleeding disappeared as the end point. After cooling to room temperature with stirring, suction filtration is performed, and after washing with water, the salt-forming compound remaining on the filter paper is dried by removing moisture with a dryer. I. A salt-forming compound of acid blue 62 and distearyldimethylammonium chloride, a salt-forming compound (A-10) was obtained.

(Salt-forming compound (A-11))
In the following procedure, C.I. I. A salt-forming compound (A-11) composed of Acid Blue 138 and distearyldimethylammonium chloride (Cotamine D86P) (the molecular weight of the cation moiety was 550) was produced.
In a 7-15 mol% sodium hydroxide solution, C.I. I. Acid Blue 138 is dissolved, sufficiently mixed and stirred, heated to 70 to 90 ° C., and then Cotamine D86P is added dropwise little by little. Coatamine D86P may be dissolved in water and used as an aqueous solution. After adding Cotamine D86P dropwise, the mixture is stirred at 70 to 90 ° C. for 60 minutes to sufficiently react. In order to confirm the end point of the reaction, it can be judged that the salt-forming compound was obtained with the reaction solution dropped on the filter paper and the point where the bleeding disappeared as the end point. After cooling to room temperature with stirring, suction filtration is performed, and after washing with water, the salt-forming compound remaining on the filter paper is dried by removing moisture with a dryer. I. A salt-forming compound of acid blue 138 and distearyldimethylammonium chloride, a salt-forming compound (A-11) was obtained.

<Manufacturing method of other salt-forming compound (C)>
(Salt-forming compound (C-1))
In the following procedure, C.I. I. Direct Blue 86 and dialkyl (alkyl C ₁₄ -C ₁₈₎ was prepared dimethyl ammonium chloride (Arquad 2HT-75) salt-forming compound consisting (molecular weight of the cationic portion is 438 to 550) and (C-2).
In a 7-15 mol% sodium hydroxide solution, C.I. I. Direct Blue 86 is dissolved, sufficiently mixed and stirred, heated to 70 to 90 ° C., and then Arcard 2HT-75 is added dropwise little by little. Arcade 2HT-75 may be dissolved in water and used as an aqueous solution. After dripping Arcade 2HT-75, the mixture is stirred at 70 to 90 ° C. for 60 minutes to sufficiently react. In order to confirm the end point of the reaction, it can be judged that the salt-forming compound was obtained with the reaction solution dropped on the filter paper and the point where the bleeding disappeared as the end point. After cooling to room temperature with stirring, suction filtration is performed, and after washing with water, the salt-forming compound remaining on the filter paper is dried by removing moisture with a dryer. I. Direct Blue 86 and dialkyl (alkyl C ₁₄ -C ₁₈₎ salification compound with dimethyl ammonium chloride, to give salt formation compound (C-1).

<Method for producing pigment dispersion>
(Preparation of pigment dispersion (DP-1))
The following mixture was stirred and mixed so as to be uniform, and then dispersed with an Eiger mill (“Mini Model M-250 MKII” manufactured by Eiger Japan) using zirconia beads having a diameter of 0.5 mm, and then 5.0 μm. And a pigment dispersion (DP-1) was produced.
Blue fine pigment 1 (CI Pigment Blue 15: 6): 11.0 parts acrylic resin solution 1: 40.0 parts propylene glycol monomethyl ether acetate (PGMAC): 48.0 parts Resin-type dispersant (Ciba Japan) "EFKA4300"): 1.0 part

  Hereinafter, pigment dispersions (DP-2 to 7) were produced in the same manner as the pigment dispersion (DP-1) except that the pigments were changed to the pigments shown in Table 1.

<Method for producing red and green resist materials>
(Preparation of red resist material)
The following mixture was stirred and mixed to be uniform and then filtered through a 1.0 μm filter to obtain a red resist material.
Pigment dispersion (DP-4): 50.0 parts Pigment dispersion (DP-5): 10.0 parts Acrylic resin solution 1: 11.0 parts Trimethylolpropane triacrylate: 4.2 parts (Shin Nakamura Chemical Co., Ltd.) "NK ester ATMPT"
Photopolymerization initiator (“Irgacure 907” manufactured by Ciba Japan Co., Ltd.): 1.2 parts sensitizer (“EAB-F” manufactured by Hodogaya Chemical Co., Ltd.): 0.4 parts ethylene glycol monomethyl ether acetate: 23.2 parts

(Preparation of green resist material)
The following mixture was stirred and mixed to be uniform and then filtered through a 1.0 μm filter to obtain a green resist material.
Pigment dispersion (DP-6): 45.0 parts Pigment dispersion (DP-7): 15.0 parts Acrylic resin solution 1: 11.0 parts Trimethylolpropane triacrylate: 4.2 parts (Shin Nakamura Chemical Co., Ltd.) "NK ester ATMPT"
Photopolymerization initiator (“Irgacure 907” manufactured by Ciba Japan Co., Ltd.): 1.2 parts sensitizer (“EAB-F” manufactured by Hodogaya Chemical Co., Ltd.): 0.4 parts ethylene glycol monomethyl ether acetate: 23.2 parts

[Examples 1 to 11, Comparative Examples 1 and 2]
Example 1 Coloring Composition (DA-1)
4. The following mixture is stirred and mixed so as to be uniform, and then dispersed for 5 hours with an Eiger mill (“Mini Model M-250 MKII” manufactured by Eiger Japan) using zirconia beads having a diameter of 0.5 mm. The mixture was filtered through a 0 μm filter to prepare a mixed coloring composition.
Salt-forming compound (A-1): 11.0 parts Acrylic resin solution 1: 40.0 parts Cyclohexanone: 49.0 parts

(Examples 2 to 11, Comparative Examples 1 and 2; Colored composition (DA-2 to 11, DC-1 and 2))
Hereinafter, the colored composition (DA-) was changed in the same manner as the colored composition (DA-1) of Example 1 except that the salt-forming compound (A-1) was changed to the salt-forming compound and anthraquinone compound shown in Table 2. 2-11, DC-1, 2) were prepared. Furthermore, the coating-film foreign material was evaluated on the conditions shown below using the obtained coloring composition.

(Coating foreign material test method)
The evaluation was performed by preparing a test substrate and counting the number of particles. The colored composition was applied on the transparent substrate so that the dry coating film was about 2.0 μm, and heated in an oven at 230 ° C. for 20 minutes to obtain a test substrate. The evaluation was performed by observing the surface using a metal microscope “BX60” manufactured by Olympus System. The magnification was 500 times, and the number of particles that were observable in arbitrary 5 fields of view through transmission was counted.
In the following evaluation results, ◎ and ○ are good, Δ is a level that does not cause a problem in use although there are many foreign matters, and × indicates coating unevenness (spots) due to foreign matters.
未 満: Less than 5 ○: 5 or more, less than 20 Δ: 20 or more, less than 100 ×: 100 or less, Table 2 shows the results.

All of the blue-colored compositions containing the salt-forming compound (A), which is a feature of the present invention, resulted in less foreign matter (undissolved foreign matter) in the substrate evaluation. C. of Comparative Example 1 not salted I. When Acid Blue 112 was used, there were very many foreign substances, whereas the salt-forming compound having a quaternary ammonium salt structure of the present invention was very good.
Comparing Examples 1 to 7 based on the same xanthene-based acidic dye structure, the colored composition (DA-5) of Example 5 has only one alkyl chain having a C number (carbon number) of 5 or more, Since all four colored compositions (DA-6) of Example 6 have an alkyl chain with a C number of less than 5, the quaternary ammonium moiety has a C number of 5 to 20 compared to Examples 5 and 6. The colored compositions (DA-1 to 4) of Examples 1 to 4 having two or more chains are good with little coating film foreign matter, and the molecular weight of the quaternary ammonium moiety is 350 to 800. 4 was a very good result.
In Comparative Example 2, a salt-forming compound of a phthalocyanine dye was used, but the salt-forming compound of a phthalocyanine dye alone showed a cyan color and did not become a desired colorant.

[Examples 12 to 20, Comparative Examples 3 and 5]
(Example 12: Resist material (R-1))
The following mixture was stirred and mixed so as to be uniform, and then filtered through a 1.0 μm filter to obtain an alkali developing type colored resist material (R-1).
Coloring composition (DA-1): 60.0 parts Acrylic resin solution 1: 11.0 parts Trimethylolpropane triacrylate: 4.2 parts (“NK Ester ATMPT” manufactured by Shin-Nakamura Chemical Co., Ltd.)
Photopolymerization initiator (“Irgacure 907” manufactured by Ciba Japan Co., Ltd.): 1.2 parts sensitizer (“EAB-F” manufactured by Hodogaya Chemical Co., Ltd.): 0.4 parts ethylene glycol monomethyl ether acetate: 23.2 parts

(Examples 13 to 20, Comparative Examples 3 and 5; resist material (R-2 to 9, 13, and 15))
Hereinafter, the alkali developing type was used in the same manner as the resist material (R-1) of Example 12 except that the coloring composition was changed to the type and blending amount of the coloring composition (pigment dispersion or coloring composition) shown in Table 3. Resist materials (R-2 to 9, 13, 15) were obtained. In the resist material, the total amount of the colored composition (pigment dispersion or colored composition) is 60 parts in all resist materials.

[Examples 21 to 23, Comparative Examples 4 and 6]
(Example 21; resist material (R-10))
The following mixture was stirred and mixed to be uniform, and then filtered through a 1.0 μm filter to obtain an alkali developing type colored resist material (R-10).
Salt-forming compound-containing resin solution (DA-4): 30.0 parts Pigment dispersion (DP-1): 30.0 parts Acrylic resin solution 1: 11.0 parts Trimethylolpropane triacrylate: 4.2 parts (new "NK ESTER ATMPT" manufactured by Nakamura Chemical Co., Ltd.)
Photopolymerization initiator (“Irgacure 907” manufactured by Ciba Japan Co., Ltd.): 1.2 parts sensitizer (“EAB-F” manufactured by Hodogaya Chemical Co., Ltd.): 0.4 parts ethylene glycol monomethyl ether acetate: 23.2 parts

(Examples 22 and 23, Comparative Examples 4 and 6; resist material (R-11, 12, 14, 16))
Hereinafter, the alkali developing type was performed in the same manner as the resist material (R-10) of Example 21 except that the coloring composition was changed to the type and blending amount of the coloring composition (pigment dispersion or coloring composition) shown in Table 3. Colored resist materials (R-11, 12, 14, 16) were obtained. In the resist material, a colored composition (pigment dispersion or colored composition) is used in combination, but the total amount of the colored composition is 60 parts in all resist materials.

(Examples 24-29; resist material (R-17-22)
The alkali developing type colored resist materials (R-17, 18, 19) were obtained in the same manner as the resist material (R-1), except that the acrylic resin solution 1 of Example 12 was replaced with the acrylic resin solutions 2, 3, and 4.
Furthermore, the acrylic resin solution 1 of Example 16 was replaced with the acrylic resin solutions 2, 3 and 4, and the alkali developing type colored resist materials (R-20, 21, and 22) were obtained in the same manner as the resist material (R-5). It was.

(Evaluation of resist material)
Each test of the chromaticity (lightness Y) of the coating film of the obtained resist material (R-1 to 22), coating film foreign matter, heat resistance, light resistance, and solvent resistance was performed by the following methods. Table 4 shows the test results.

(Evaluation of color characteristics)
A resist material was applied on a glass substrate so that x = 0.150 and y = 0.060 using a C light source, and the substrate was heated at 230 ° C. for 20 minutes. Thereafter, the brightness (Y) of the obtained substrate was measured with a microspectrophotometer (“OSP-SP200” manufactured by Olympus Optical Co., Ltd.).
The results are shown in Table 4 below.

(Coating foreign material test method)
A resist material was applied on the transparent substrate so that the dried coating film was about 2.5 μm, and the entire surface was exposed to ultraviolet light. The evaluation was performed by observing the surface using a metal microscope “BX60” manufactured by Olympus System. The magnification was 500 times, and the number of particles that could be confirmed in transmission through 5 arbitrary fields was counted.
In the following evaluation results, ◎ and ○ are good, Δ is a level that does not cause a problem in use although there are many foreign matters, and × indicates coating unevenness due to the foreign matters.
未 満: Less than 5 ○: 5 or more, less than 20 Δ: 20 or more, less than 100 ×: 100 or less, Table 4 shows the results.

(Method of coating heat resistance test)
A resist material is applied on a transparent substrate so that the dry coating thickness is about 2.5 μm, and after UV exposure through a mask having a predetermined pattern, an alkali developer is sprayed to remove uncured parts. Thus, a desired pattern was formed. Then, after heating in an oven at 230 ° C. for 20 minutes and allowing to cool, the chromaticity 1 (L * (1), a * (1), b * (1)) of the obtained coating film with a C light source is microspectrophotometric. It measured using the meter (Olympus Optical Co., Ltd. "OSP-SP200"). Further, as a heat resistance test, it was heated in an oven at 250 ° C. for 1 hour, and chromaticity 2 (L * (2), a * (2), b * (2)) with a C light source was measured. The results are shown in Table 4 below.

Using the measured chromaticity, a color difference ΔEab * was calculated by the following formula, and the heat resistance of the coating film was evaluated in the following four stages.
ΔEab * = √ ((L * (2)-L * (1)) ² + (a * (2)-a * (1)) ² + (b * (2)-b * (1)) ² )
：: ΔEab * is less than 1.5 ○: ΔEab * is 1.5 or more and less than 2.5 Δ: ΔEab * is 2.5 or more and less than 5.0 ×: ΔEab * is 5.0 or more, Table 4 The results are shown in.

(Method of coating light resistance test)
A test substrate was prepared in the same procedure as the coating heat resistance test, and the chromaticity 1 (L * (1), a * (1), b * (1)) with a C light source was measured with a microspectrophotometer (Olympus Optics). It measured using "OSP-SP200" by a company. Thereafter, the substrate was placed in a light resistance tester (“SUNTEST CPS +” manufactured by TOYOSEIKI) and left for 500 hours. After removing the substrate, measure chromaticity 2 (L * (2), a * (2), b * (2)) with a C light source, and calculate the color difference ΔEab * in the same manner as the coating film heat resistance test. The light resistance of the coating film was evaluated in four stages according to the same criteria as heat resistance.
：: ΔEab * is less than 1.5 ○: ΔEab * is 1.5 or more and less than 2.5 Δ: ΔEab * is 2.5 or more and less than 5.0 ×: ΔEab * is 5.0 or more, Table 4 The results are shown in.

(Method of coating solvent resistance test)
A test substrate is prepared in the same procedure as the heat resistance test, and the chromaticity 1 (L * (1), a * (1), b * (1)) with a C light source is measured with a microspectrophotometer (manufactured by Olympus Optical Co., Ltd.) It measured using "OSP-SP200"). Thereafter, the substrate was immersed in N-methylpyrrolidone for 30 minutes. After removing the substrate, the chromaticity 2 (L * (2), a * (2), b * (2)) with a C light source was measured, and the color difference change rate ΔEab * was measured in the same manner as in the coating film heat resistance test. The solvent resistance of the coating film was evaluated in four stages according to the same criteria as heat resistance.
：: ΔEab * is less than 1.5 ○: ΔEab * is 1.5 or more and less than 2.5 Δ: ΔEab * is 2.5 or more and less than 5.0 ×: ΔEab * is 5.0 or more, Table 4 The results are shown in.

  The resist materials (R-1 to 11, and 17 to 22) of Examples 12 to 22 and 24 to 29 had good light resistance, heat resistance, and solvent resistance. In addition, the resist material (R-12) of Example 23 has excellent color characteristics and results in slightly poor heat resistance, light resistance, and solvent resistance, but has no problem for use in color filters. Met. On the other hand, the resist material (R-13) of Comparative Example 3 has many foreign matters and is difficult to use. Although the resist material (R-14) of Comparative Example 4 has few foreign matters, it has problems due to heat resistance, light resistance, and solvent resistance. The resist materials (R-15, 16) of Comparative Examples 5 and 6 were lower in brightness than Examples 12-29.

Examples 21 and 22 (resist materials (R-10, 11)) further containing a phthalocyanine pigment as a colorant are examples 16 (resist materials (R-5)) consisting only of the salt-forming compound (A). ) Better than heat resistance.
Further, as an anthraquinone acid dye of the salt-forming compound (A), C.I. I. Examples 12 to 17 and 21 to 29 using Acid Blue 112 (resist materials (R-1 to 6, 10 to 22)) were very excellent in brightness Y.

[Examples 30 to 47, Comparative Examples 7 to 10]
Example 30 Color Filter (CF-1)
A black matrix is patterned on a glass substrate, and a red resist material is applied to the substrate with a spin coater in a C light source (hereinafter also used for green and blue) x = 0.640, y = 0.330 A colored film was formed by applying to the film thickness. The film was irradiated with ultraviolet rays of 300 mJ / cm ² through a photomask using an ultrahigh pressure mercury lamp. Next, spray development was performed with an alkaline developer composed of a 0.2% by weight aqueous sodium carbonate solution to remove unexposed portions, followed by washing with ion-exchanged water. Formed. By the same method, the green resist material is formed to have a film thickness such that x = 0.300 and y = 0.600, and the blue resist material (R-1) is used, x = 0.150, y = 0.060. The green filter segment and the blue filter segment were formed to obtain a color filter (CF-1).

(Production of liquid crystal display device)
A transparent ITO electrode layer was formed on the obtained RGB color filter, and a polyimide alignment layer was formed thereon. A polarizing plate was formed on the other surface of this glass substrate. On the other hand, a TFT array and a pixel electrode were formed on one surface of another (second) glass substrate, and a polarizing plate was formed on the other surface. The two glass substrates prepared in this way are arranged facing each other so that the electrode layers face each other, and are aligned using spacer beads while keeping the distance between the two substrates constant, and an opening for injecting a liquid crystal composition The periphery was sealed with a sealant so as to leave After injecting the liquid crystal composition from the opening, the opening was sealed. A liquid crystal display device thus produced was combined with a three-wavelength CCFL light source of a backlight unit to produce a color display device.

(Examples 31-47, Comparative Examples 7-10)
Hereinafter, in the same manner as in Example 30 (CF-1), the color filters (CF-2 to 22) and a color display device were produced.

  Thereafter, in the obtained color display device, a light source was emitted to display a color image, and the brightness of each color filter segment portion was measured with a microspectrophotometer (“OSP-SP200” manufactured by Olympus Optical Co., Ltd.). The results are shown in Table 5.

  When Examples 30 to 47 and Comparative Examples 7 to 10 are compared, a resist material (R-15, 16) containing only a conventionally used copper phthalocyanine pigment and / or dioxazine pigment in white display, and a phthalocyanine dye Compared to a color filter (color filter (CF-14 to 16)) formed from a resist material (R-14) containing a salt-forming compound, the colored composition of the present invention containing the salt-forming compound (A). High brightness Y is obtained in the formed color filters (color filters (CF-1 to 12, 17 to 22)). Although the comparative example 7 (color filter (CF-13)) has high brightness, as described above, many foreign substances are generated, so that it is difficult to use practically.

Claims (13)

  A color filter for a color filter comprising at least a colorant and a resin, wherein the colorant comprises a salt-forming compound (A) comprising an anthraquinone acid dye and a quaternary ammonium salt compound. Blue coloring composition.   Anthraquinone acid dyes are C.I. I. The blue coloring composition for a color filter according to claim 1, which is classified into acid blue.   The blue coloring composition for a color filter according to claim 1 or 2, wherein the anthraquinone acid dye is diaminoanthraquinonesulfonic acid. The blue coloring composition for a color filter according to any one of claims 1 to 3, wherein the anthraquinone acid dye is represented by the following general formula (1).
General formula (1)

(In general formula (1),
R ₁ and R ₂ each independently have a hydrogen atom, an alkyl group that may have a substituent, an aryl group that may have a substituent, an alicyclic group that may have a substituent, or a substituent. Or an alkynyl group which may have a substituent, or an alkoxyl group which may have a substituent.
R _{3 to} R ₈ are each independently a hydrogen atom or a SO ₃ M group.
In addition, at least one of R _{1 to} R ₈ is an SO ₃ M group, or an alkyl group, an aryl group, an alicyclic group, an alkenyl group, an alkynyl group, or an alkoxyl group that is substituted with an SO ₃ M group. Either.
M represents a hydrogen ion or a sodium ion. )   Anthraquinone acid dyes are C.I. I. The blue coloring composition for color filters according to any one of claims 1 to 4, wherein the blue coloring composition is at least one selected from the group consisting of Acid Blue 62, 112, 138, and 140.   The molecular weight of the cation part of a quaternary ammonium salt compound is the range of 190-900, The blue coloring composition for color filters in any one of Claims 1-5 characterized by the above-mentioned. The blue colored composition for a color filter according to any one of claims 1 to 6, wherein the quaternary ammonium salt compound is represented by the following general formula (2).
General formula (2)

(In General Formula (2), R _{9 to} R ₁₂ each independently represents an alkyl group having 1 to 20 carbon atoms or a benzyl group, and at least two of R ₉ , R ₁₀ , R ₁₁ and R ₁₂ are present. The number of C is 5 to 20. Y ⁻ represents an inorganic or organic anion.)   The blue coloring composition for a color filter according to any one of claims 1 to 7, wherein the colorant further contains a blue pigment.   The blue coloring composition for a color filter according to claim 8, wherein the blue pigment is a phthalocyanine pigment and / or a triarylmethane lake pigment.   The phthalocyanine pigment is C.I. I. The blue coloring composition for a color filter according to claim 9, which is CI Pigment Blue 15: 6.   The blue coloring composition for a color filter according to any one of claims 1 to 10, wherein the colorant further contains a dioxazine pigment.   Furthermore, the blue coloring composition for color filters in any one of Claims 1-11 containing a photopolymerizable monomer and / or a photoinitiator.   A color filter comprising at least one red filter segment, at least one green filter segment and at least one blue filter segment, wherein the at least one blue filter segment is a blue coloring composition for a color filter according to any one of claims 1 to 12. A color filter formed by objects.