KR20090032975A - Colored composition for color filter, color filter, and display device - Google Patents

Abstract

A colored composition for a color filter containing di-, tri- and/or tetrapropyleneglycolic dialkylether-based solvent, a color filter, and a display device are provided to ensure excellent wettability and high flatness and to prevent image defect. A colored composition for a color filter contains a color material and solvent. The solvent is at least one kind selected from group consisting of dipropyleneglycolic dialkylether-based solvent of the formula (1): R1O-(CH(CH3)CH2O)2-R2; tripropyleneglycolic dialkylether-based solvent of the formula (2): R1O-(CH(CH3)CH2O)3-R2; and tetrapropyleneglycolic dialkylether-based solvent of the formula (3): R1O-(CH(CH3)CH2O)4-R2.

Description

Color composition for color filters, color filters, and display devices {COLORED COMPOSITION FOR COLOR FILTER, COLOR FILTER, AND DISPLAY DEVICE}

This invention relates to the coloring composition for color filters, and the color filter and display apparatus using the same.

The color filter for display apparatus arrange | positions dot image, such as red (R), green (G), blue (B), on a board | substrate, such as glass, in a matrix form, for example, and blacks between the arrange | positioned image and an image. It has a structure in which dark colors such as matrices are formed and isolated.

As a method of producing a color filter, conventionally, the method of forming a coloring pattern by application | coating, exposure, and image development of the (1) dyeing method, (2) printing method, (3) colored photosensitive resin liquid (coloring resist method) , (4) a method of transferring the pattern image formed on the support body sequentially, on a final or temporary substrate, (5) applying a colored photosensitive resin liquid onto a support body in advance, to form a photosensitive colored layer, and the photosensitive The colored layer is directly transferred onto the final or temporary substrate, exposed and developed to form a colored pattern (so-called transfer method), and (6) the colored liquid composition is discharged to a desired area by using the inkjet method to color the RGB or the like. A method of forming a pattern is known (see, for example, Japanese Patent Application Laid-open No. Hei 8-227012).

Among these methods, for example, in the colored resist method or the inkjet method, the wettability on the surface of the coated object of the liquid to be applied or discharged, that is, the degree of wettability when placed on the surface, is prevented from defects such as uneven coating or whitening. It is a factor influencing the effect of.

For example, when the coating liquid is applied to a desired substrate with, for example, a slit coater or the like, or an inkjet method is applied to a concave region surrounded by a deep color wall such as a black matrix previously formed on the substrate. In the case where a colored pattern is to be formed by discharging a liquid colored composition, if the coating liquid and the discharged colored composition after application do not wet well on the surface of the substrate, a uniform film cannot be obtained or a black matrix There is a problem in that droplets deposited in the partitioned concave region cannot reach every corner, resulting in defects such as whitening.

As a countermeasure against such a problem, for example, a method of having the property of bouncing each other between the black matrix and the colored ink to be discharged, a method of increasing the wettability of the colored ink in the region sandwiched by the black matrix, and the like have been studied.

Generally, the photosensitive composition containing a polymeric monomer, a polymerization initiator, a solvent, etc. is used for coloring compositions, such as these coating liquids and inks. Among these solvents, ethylene glycol solvents are widely used. In addition, there is a disclosure regarding a resin composition for an inkjet type color filter using a high boiling point solvent having a boiling point of 250 ° C. or higher (see, for example, Japanese Patent Laid-Open No. 2000-310706). Here, diethylene glycol dialkyl ether solvents, triethylene glycol dialkyl ether solvents, polyethylene glycol dialkyl ether solvents, and propylene glycol dialkyl ether solvents are described as solvents having a boiling point of 250 ° C. or higher. Is obtained, and clogging by head drying can be prevented.

However, although such a high boiling point solvent has a high boiling point and is effective in preventing dry clogging of an inkjet head, its polarity and surface tension are not necessarily low, and the wettability with respect to a substrate (for example, a glass substrate), specifically, It was inadequate in terms of the ease of wetting of the liquid in contact with the substrate. Therefore, when droplets are applied to recesses on a substrate formed of a deep color wall such as a black matrix, for example, it may be difficult to get wet. For example, the corners of four rectangular recesses may not reach every corner, and color fading may occur. It may occur or the flatness may become insufficient.

In addition, there is a fear of deterioration of the working environment due to volatilization of the ethylene glycol solvent as described above. In particular, in the field of color filters forcing solvent removal under high temperature, the environmental degradation cannot be ignored.

This invention is made | formed in view of the above, The coloring composition for color filters with favorable wet spread when it is given to the board | substrate (for example, a glass substrate), and the color which has high flatness and was prevented from image defects, such as a color fallout An object of the present invention is to provide a filter and a display device having high image display characteristics, and to achieve the object.

The specific means for achieving the said subject is as follows.

<1> Colorants, a dipropylene glycol dialkyl ether solvent represented by the following structural formula (1), a tripropylene glycol dialkyl ether solvent represented by the following structural formula (2), and tetra represented by the following structural formula (3) It is a coloring composition for color filters containing the 1 type of solvent chosen from the group which consists of a propylene glycol dialkyl ether solvent, or 2 or more types of mixed solvents.

R ¹ O— (CH (CH ₃ ) CH ₂ O) ₂ —R ² . (One)

R ¹ O— (CH (CH ₃ ) CH ₂ O) ₃ —R ² . (2)

R ¹ O— (CH (CH ₃ ) CH ₂ O) ₄ —R ² . (3)

[Wherein, R ¹ and R ² each independently represent an alkyl group having 1 to 10 carbon atoms.]

At least 1 sort (s) of <2> above-mentioned solvents are boiling points of 200 degreeC or more and 300 degrees C or less, The coloring composition for color filters as described in said <1> characterized by the above-mentioned.

<3> The said color material is a pigment, It is the coloring composition for color filters as described in said <1> or said <2> characterized by the above-mentioned.

The <4> pigment dispersant is further contained, It is the coloring composition for color filters as described in said <3> characterized by the above-mentioned.

The <5> polymerizable monomer is further contained, and the said polymerizable monomer is at least 1 sort (s) chosen from an acryl-type monomer, an epoxy-type monomer, and an oxetanyl-type monomer, In either <1>-<4> characterized by the above-mentioned. It is a coloring composition for color filters described.

It is a coloring filter coloring composition in any one of said <1>-<5> characterized by further containing <6> binder resin.

The viscosity in <7> 20 degreeC is 10-20 mPa * s, It is a coloring composition for color filters in any one of said <1>-<6> characterized by the above-mentioned.

It is used in order to produce an inkjet color filter by discharging by a <8> inkjet system and forming a colored area | region, It is the coloring composition for color filters in any one of said <1>-<7> characterized by the above-mentioned.

<9> It is a color filter produced using the coloring composition for color filters in any one of said <1>-<8>.

<10> It is a display apparatus provided with the color filter as described in said <9>.

(Effects of the Invention)

According to the present invention <1> to <8>, it is possible to provide a color composition for color filters having a good wet spread when applied to a substrate (for example, a glass substrate). According to the invention <9>, a color filter having high flatness and preventing image defects such as color loss, and a display device having high image display characteristics can be provided according to the invention <10>.

Hereinafter, the coloring composition for color filters of this invention, the color filter using this, and a display apparatus are demonstrated in detail.

<Coloring composition for color filters>

The coloring composition for color filters of this invention is comprised using a coloring material and a solvent at least, The dipropylene glycol dialkyl ether type solvent represented by the following structural formula (1) as said solvent, The tripropylene glycol represented by the following structural formula (2) A dialkyl ether solvent and a solvent selected from the group consisting of tetrapropylene glycol dialkyl ether represented by the following structural formula (3) (hereinafter also referred to as "specific solvent in the present invention") are used. Moreover, it is preferable to contain a pigment dispersant, a polymerizable monomer, and a binder as needed, and it can comprise using other additives other than surfactant as needed.

R ¹ O— (CH (CH ₃ ) CH ₂ O) ₂ —R ² . (One)

R ¹ O— (CH (CH ₃ ) CH ₂ O) ₃ —R ² . (2)

R ¹ O— (CH (CH ₃ ) CH ₂ O) ₄ —R ² . (3)

[Wherein, R ¹ and R ² each independently represent an alkyl group having 1 to 10 carbon atoms.]

In the present invention, since the solvent represented by any one of the structural formulas (1) to (3) is used alone or in combination of two or more kinds, the polarity is lower than that of the ethylene glycol solvent, and the surface tension can be reduced. The wettability to the substrate (e.g., glass substrate), specifically, the wettability when the substrate is in contact with the substrate, becomes favorable, so that a flat colored region (e.g., colored pixels) is obtained, such as coating defects or whitening. Effective for preventing the occurrence of defects. In particular, when a droplet is applied to a concave region formed by a partition such as a black matrix formed on a substrate in advance, droplets deposited on the concave region partitioned by a black matrix or the like are filled to every corner, and for example, four rectangular regions are formed. It is possible to suppress defects such as whitening caused by the remaining parts that do not spread in the corners. Thereby, the display characteristics, such as the fineness and color taste at the time of image display, can be improved remarkably. In addition, the solvent represented by any one of the above structural formulas (1) to (3) is also excellent in safety to the human body and the working environment compared to the ethylene glycol solvents generally used conventionally.

Hereinafter, each component which comprises the coloring composition for color filters of this invention is demonstrated in detail.

-solvent-

The coloring composition for color filters of this invention is a dipropylene glycol dialkyl ether type solvent represented by following structural formula (1), the tripropylene glycol dialkyl ether type solvent represented by following structural formula (2), and following structural formula (3) 1 type of solvent chosen from the group which consists of tetrapropylene glycol dialkyl ether shown, or 2 or more types of mixed solvent (specific solvent in this invention) is contained.

R ¹ O— (CH (CH ₃ ) CH ₂ O) ₂ —R ² . (One)

R ¹ O— (CH (CH ₃ ) CH ₂ O) ₃ —R ² . (2)

R ¹ O— (CH (CH ₃ ) CH ₂ O) ₄ —R ² . (3)

In said Formula (1)-(3), R <^1> and R <^2> represents a C1-C10 alkyl group each independently.

As a C1-C10 alkyl group represented by R <^1> , R <^2> , a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, an octyl group etc. are mentioned, for example. Especially, since both R <^1> and R <^2> have moderate volatility, it is preferable that it is a C1-C6 alkyl group, and it is especially preferable that it is a C1-C4 alkyl group.

Specific examples of the dipropylene glycol dialkyl ether solvent include dipropylene glycol dimethyl ether, dipropylene glycol diethyl ether, dipropylene glycol dipropyl ether, dipropylene glycol dibutyl ether, dipropylene glycol dipentyl ether, and dipropylene glycol di. Hexyl ether, dipropylene glycol dioctyl ether, dipropylene glycol methyl ethyl ether, dipropylene glycol methyl propyl ether, dipropylene glycol methyl butyl ether, dipropylene glycol ethyl propyl ether, dipropylene glycol ethyl butyl ether, dipropylene glycol propyl butyl Ether and the like.

Specific examples of the tripropylene glycol dialkyl ether solvent include tripropylene glycol dimethyl ether, tripropylene glycol diethyl ether, tripropylene glycol dipropyl ether, tripropylene glycol dibutyl ether, tripropylene glycol dipentyl ether, and tripropylene glycol di Hexyl ether, tripropylene glycol dioctyl ether, tripropylene glycol methyl ethyl ether, tripropylene glycol methyl propyl ether, tripropylene glycol methyl butyl ether, tripropylene glycol ethyl propyl ether, tripropylene glycol ethyl butyl ether, tripropylene glycol propyl butyl Ether and the like.

Specific examples of the tetrapropylene glycol dialkyl ether solvent include tetrapropylene glycol dimethyl ether, tetrapropylene glycol diethyl ether, tetrapropylene glycol dipropyl ether, tetrapropylene glycol dibutyl ether, tetrapropylene glycol dipentyl ether, and tetrapropylene glycol. Dihexyl ether, tetrapropylene glycol dioctyl ether, tetrapropylene glycol methyl ethyl ether, tetrapropylene glycol methyl propyl ether, tetrapropylene glycol methyl butyl ether, tetrapropylene glycol ethyl propyl ether, tetrapropylene glycol ethyl butyl ether, tetrapropylene glycol propyl Butyl ether etc. are mentioned.

All of said dialkyl ethers may be linear or have a branch, and the alkyl carbon couple | bonded with ether oxygen may be primary, secondary, or tertiary.

It is preferable that the boiling point of the specific solvent in this invention is 200-300 degreeC under normal pressure (1.01 * 10 <^5> Pa (760mmHg)), More preferably, it is 220-300 degreeC, Especially preferably, it is 230-280 degreeC to be. When the boiling point is 200 ° C to 300 ° C, it is possible to prevent poor discharge or uneven coating due to drying in the inkjet head or slit coater. Moreover, the solvent hardly remains after the postbaking process, and the film hardness can be maintained high. It is preferable at the point which can produce the color filter which prevented generation | occurrence | production of a reticulation, display unevenness, etc ..

In the above, 1 type of solvent or 2 or more types chosen from the dipropylene glycol dialkyl ether type solvent represented by the said Formula (1), and / or the tripropylene glycol dialkyl ether type solvent represented by the said Formula (2). A mixed solvent is preferable, More preferably, the dipropylene glycol dialkyl ether solvent and / or R of the said Formula (2) when R <^1> and R <^2> of the said Formula (1) are C1-C6 alkyl groups ¹ and R <^2> are 1 type of solvents or 2 or more types of mixed solvents chosen from the tripropylene glycol dialkyl ether solvent in the case of a C1-C6 alkyl group.

Among these, in particular, wetting of the substrate (especially the glass substrate) is easily performed, and dipropylene glycol dimethyl ether, tripropylene glycol dimethyl ether, and tripropylene glycol diethyl ether are used for preventing defects such as whitening and flatness. And any 1 or 2 or more types of mixed solvent from the group which consists of a tripropylene glycol methyl butyl ether is preferable.

50-95 mass% is preferable with respect to the total mass of the color composition for color filters, and, as for content in the coloring composition for color filters of the specific solvent in this invention, 60-90 mass% is more preferable, 70-85 Mass% is particularly preferred. When content of a solvent exists in the said range, the wettability to the board | substrate at the time of preparing a coloring composition can be made favorable, and the viscosity of an ink can be suppressed low. For example, in the case of ejecting by the inkjet method, it is possible to prevent the occurrence of defects such as whitening by being wetted on the substrate, and to form stable pixels without defects and to facilitate ejection of ink.

Moreover, you may use together another solvent as needed with the specific solvent in the said invention.

As another solvent, for example, "the chemical handbook application edition 3rd edition, Maruzen Kabuki Kaisha, August 15, 1985 issuance", "solvent pocket book, Kabuki Kaisha OHM company, June 20, 1989 publication", " The solvent described in the solvent handbook, Dangosha, August 10, 1982 publication can be used. In addition, paragraphs [0066] and [0092] to [0096] of Japanese Patent Laid-Open No. 2004-220036, paragraphs [0082] to [0089] of Japanese Patent Laid-Open No. 2006-284752, and Japanese Patent Laid-Open No. 2006-299090 Paragraph Nos. Of [0024] to [0029], Japanese Patent Laid-Open No. 2006-345449, Paragraph No. of WO 04-7626, Japanese Patent Laid-Open No. 2006-83362, Japan Paragraph Nos. [0063] to [0067] of Japanese Patent Application Laid-Open No. 2005-234045, Paragraph Nos. Of Japanese Patent No. 3692365, Paragraph No. of Japanese Patent Laid-Open No. 2006-163306, The solvent described in Paragraph No. [0031]-[0037] of Unexamined-Japanese-Patent No. 2000-310706, etc. can be used preferably.

Color materials

The coloring composition for color filters of this invention contains at least 1 type of color materials. By containing a color material, the colored composition can be obtained and the colored pixel which comprises a color filter can be formed.

As a coloring material, well-known things, such as an organic pigment, an inorganic pigment, and dye, can be used. Various pigments are mentioned as a preferable color material from a viewpoint that sufficient transmittance | permeation density, light resistance, adhesiveness to a board | substrate, and other various tolerances are calculated | required. Preferred specific examples of the colorant include compounds classified as pigments in the color index (CI; The Society of Dyers and Colorists, Inc.), and Japanese Patent Laid-Open Nos. 2005-17716. The pigment and dye described, the pigment of Unexamined-Japanese-Patent No. 2004-361447, and the color material of Unexamined-Japanese-Patent No. 2005-17521 can be mentioned. By containing a pigment as a color material, the storage stability of a pixel improves.

Although content in the coloring composition for color filters of a coloring material is not specifically limited, From a viewpoint of obtaining a desired color and density | concentration, the ratio of the coloring material to solid content total mass of a coloring composition has preferable 10 mass% or more, 12- 70 mass% is further more preferable, 15-60 mass% is more preferable, 20-50 mass% is especially preferable.

It is preferable that a pigment contains the pigment of red, green, or blue. Thereby, the red pixel, green pixel, and blue pixel of a color filter can be formed preferably using the coloring composition for color filters of this invention.

The pigment is C.I. Pigment Red 254, C.I. Pigment Red 177, C.I. Pigment Yellow 150, C.I. Pigment Green 36, C.I. Pigment Green 7, C.I. Pigment Blue 15: 6 and C.I. It is preferable that it is 1 or more types chosen from pigment violet 23. By containing these pigments, the dispersion state of the coloring composition is stabilized, and the color purity is also good.

It is preferable that the pigment in the coloring composition for red pixel formation contains at least 1 sort (s) of red pigment. It is not limited to the form using only one type of red pigment, The form used as a mixed pigment combining two or more types of red pigment, The form used as a mixed pigment combining red pigment and the pigment of another color Also preferred. As such a combination, for example, C.I. In Pigment Red 254, C.I. Pigment Red 177, C.I. Pigment Red 224, C.I. Pigment Yellow 139, C.I. Pigment Yellow 150 or C.I. The combination of pigment violet 23 is mentioned.

It is preferable that the pigment in the coloring composition for green pixel formation contains at least 1 sort (s) of green pigment. It is not limited to the form using only 1 type of green pigment, The form used as a mixed pigment combining 2 or more types of green pigment, The form used as a mixed pigment combining a green pigment and the pigment of another color. Also preferred. As such a combination, for example, C.I. In Pigment Green 36, C.I. Pigment Yellow 150, C.I. Pigment Yellow 139, C.I. Pigment Yellow 185, C.I. Pigment Yellow 138 or C.I. The combination of pigment yellow 180 is mentioned. C.I. Pigment Green 7 is C.I. It can be used instead of or all of Pigment Green 36.

It is preferable that the pigment in the coloring composition for blue pixel formation contains at least 1 type of blue pigment. It is not limited to the form using only 1 type of blue pigment, The form used as a mixture type pigment combining two or more types of blue pigment, and the form using combining a blue pigment and the pigment of another color are also preferable. As such a combination, for example, C.I. In Pigment Blue 15: 6, C.I. Pigment violet 23 or C.I. The combination of pigment blue 60 is mentioned.

Thus, when using a pigment together, C.I. Pigment Red 254, C.I. Pigment Green 36 and / or C.I. Pigment Green 7, C.I. Content of pigment blue 15: 6 is as follows. That is, C.I. As for pigment red 254, 30 mass% or more is preferable from a viewpoint of color purity, etc., and especially 50 mass% or more is preferable. C.I. Pigment Green 36 and / or C.I. As for content of pigment green 7, 50 mass% or more is preferable from a viewpoint of color purity, etc., and especially 60 mass% or more is preferable. C.I. Pigment Blue 15: 6 is preferably 80 mass% or more from the viewpoint of color purity and the like, and particularly preferably 90 mass% or more.

The pigment is preferably 1 to 200 nm in number average particle diameter, more preferably 10 to 100 nm, particularly preferably 10 to 50 nm. If the number average particle diameter of the pigment is 1 nm or more, since the surface energy of the particles is small, it becomes difficult to aggregate, the pigment dispersion becomes easy, and it is easy to maintain the dispersed state stably. When the number average particle diameter of the pigment is 200 nm or less, since the polarization of the pigment is hardly eliminated, the contrast is improved, which is preferable.

In addition, the "particle size" used here refers to the diameter when the electron micrograph image of a particle and the circle of the same area are considered, and the "number average particle diameter" means the 100 average value of the said particle size calculated | required about many particle | grains. .

In the present invention, inorganic pigments or extender pigments may be used as necessary. By using an inorganic pigment or an extender pigment, the thickness of the pixel can be appropriately adjusted or the viscosity of the coloring composition can be adjusted appropriately to improve the hardness and shape and durability of the pixel.

Specific examples of inorganic pigments or extender pigments include titanium oxide, barium sulfate, calcium carbonate, zincated, lead sulfate, yellow lead, zinc sulfur, bengal (red iron (III)), cadmium red, ultramarine blue, blue green, chromium oxide green, and cobalt green. , Umber, titanium black, synthetic iron black, carbon black and the like. Although the addition amount of an extender pigment can be suitably adjusted according to the objective, the range of 1-70 mass% is preferable with respect to all the pigments, and the range of 5-50 mass% is more preferable.

You may form a black matrix pattern layer on the board | substrate which comprises a color filter using the coloring composition for color filters of this invention.

When forming the pattern of a black matrix on a board | substrate using the coloring composition for color filters, it is preferable to mix | blend a black pigment with high light-shielding property in a composition. As a black pigment with high light-shielding property, inorganic coloring agents, such as carbon black and iron tetraoxide, or organic coloring agents, such as cyanine black, are mentioned, for example.

It is preferable to use a pigment in the state of a dispersion liquid. This dispersion liquid can be prepared by disperse | distributing the composition obtained by mixing the said pigment and the said solvent preferably the pigment dispersing agent mentioned later using a well-known dispersing machine. At this time, in order to provide dispersion stability of a pigment, you may add a small amount of resin. Moreover, it is also possible to prepare by adding and disperse | distributing the composition obtained by mixing the said pigment and a pigment dispersant beforehand to the monomer mentioned later. There is no restriction | limiting in particular in the dispersing machine used when disperse | distributing the said pigment, For example, the kneader described in Asakura Kunijo, "the dictionary of pigments", a 1st edition, Asakura bookstore, 2000, page 438, Known dispersers such as roll mils, attritors, super mils, dissolvers, homo-mixers, sand mils and the like can be given. In addition, the pigment may be finely pulverized using frictional force by mechanical grinding described on page 310 of the document.

(Pigment dispersant)

It is preferable to add a pigment dispersant to the coloring composition for color filters of this invention in order to acquire the dispersion stability of a pigment. By containing a pigment dispersant in a composition, stability of a coloring composition improves and it is preferable at the point which can be set as appropriate liquid viscosity and surface tension. Moreover, the color filter produced using the said coloring composition is preferable at the point that the flatness of a pixel part improves and the color nonuniformity of a color filter is reduced.

As for content of a pigment dispersing agent, the range of 0.1-10 mass% is preferable with respect to the total mass of the coloring composition for color filters, The range of 0.1-9 mass% is more preferable, The range of 0.1-8 mass% is especially preferable.

Examples of the pigment dispersant include hydroxyl group-containing carboxylic acid esters, salts of long chain polyaminoamides and high molecular weight esters, salts of high molecular weight polycarboxylic acids, salts of long chain polyaminoamides and polar acid esters, high molecular weight unsaturated esters, and polymer copolymers. , Modified polyurethane, modified polyacrylate, polyether ester type anionic activator, naphthalene sulfonic acid formalin condensate salt, aromatic sulfonic acid formalin condensate, polyoxyethylene alkyl phosphate ester, polyoxyethylene nonylphenyl ether, stearylamine acetate, pigment Derivatives and the like can be used. As a specific example of a pigment dispersant, the example of Paragraph No. [0021]-[0023] of Unexamined-Japanese-Patent No. 2005-15672 can be used as a preferable thing.

As another dispersant, the dispersant described in paragraphs [0060] to [0094] of JP-A-2004-339330 and the "monomer unit" described in paragraphs [0051] to [0070] of JP-A-2004-339331 As a dispersant comprising a polymer having a main chain structure in which at least diisocyanates and / or triisocyanates are polymerized and which do not contain a polyether chain ”.

These dispersing agents may be used individually by 1 type, and may be used in combination of 2 or more type. In this invention, the use form which combined especially a pigment derivative and a polymer dispersing agent is preferable.

(Polymerizable monomer)

It is preferable to comprise the coloring composition for color filters of this invention using at least 1 sort (s) of a polymerizable monomer (henceforth a "curable component"). It is preferable that a polymerizable monomer contains 1 or more types chosen from an acryl-type monomer, an epoxy-type monomer, and an oxetanyl-type monomer.

As the polymerizable monomer, a monomer having two or more polymerizable groups (hereinafter also referred to as "monofunctional or higher monomer") is preferable. The polymerizable monomer is not particularly limited as long as it can polymerize with an active energy ray and / or heat. More preferable are monomers having three or more polymerizable groups (hereinafter also referred to as "monofunctional monomers") from the viewpoint of the strength and solvent resistance of the film.

There is no restriction | limiting in particular in the kind of polymerizable group. As mentioned above, acryloyloxy group, methacryloyloxy group, epoxy group and oxetanyl group are particularly preferable.

Specific examples of the polymerizable monomer include the epoxy group-containing monomers described in paragraphs [0061] to [0065] of JP 2001-350012 A, the acrylate monomers described in paragraph number [0016] of JP 2002-371216 A, and Methacrylate monomers, Japanese Patent Laid-Open No. 2001-220526, Japanese Patent Laid-Open No. 2001-310937, Japanese Patent Laid-Open No. 2003-341217, paragraphs [0021] to [0084] and Japanese Patent Laid-Open No. 2004-91556 And oxetanyl group-containing monomers described in paragraphs [0022] to [0058], and the monomers described in the CMC number plate "Market Outlook of Reactive Monomer".

Examples of the epoxy group-containing monomers that are epoxy monomers include bisphenol A type epoxy resins, bisphenol F type epoxy resins, brominated bisphenol A type epoxy resins, bisphenol S type epoxy resins, diphenyl ether type epoxy resins, hydroquinone type epoxy resins, Naphthalene type epoxy resin, biphenyl type epoxy resin, fluorene type epoxy resin, phenol novolak type epoxy resin, orthocresol novolak type epoxy resin, trihydroxyphenylmethane type epoxy resin, trifunctional epoxy resin, tetrapheny Rolled ethane type epoxy resin, dicyclopentadienephenol type epoxy resin, hydrogenated bisphenol A type epoxy resin, bisphenol A nucleated polyol type epoxy resin, polypropylene glycol type epoxy resin, glycidyl ester type epoxy resin, glycidylamine Type epoxy resin, glyoxal type epoxy resin, alicyclic epoxy resin, heterocyclic epoxy resin, etc. are mentioned. .

More specifically, bisphenol A type epoxy resins, such as brand name EPICOAT828 (made by Japan Epoxy Resins Co., Ltd.), brand name YDF-175S (made by Toto Kasei Co., Ltd.), brand name YDB-715 (Doto Brominated bisphenol A type epoxy resins, such as the case make, and bisphenol S type epoxy resins, such as brand name EPICLON EXA1514 (made by DIC Corporation), hydroquinone type epoxy resins, such as brand name YDC-1312 (made by Toto Kasei Co., Ltd.), brand name EPICLON EXA4032 Naphthalene type epoxy resins, such as (made by DIC Corporation), Biphenyl type epoxy resins, such as brand name EPICOAT YX4000H (made by Japan Epoxy Resins Co., Ltd.), Bisphenols, such as brand name EPICOAT157S70 (made by Japan Epoxy Resins Co., Ltd.) Phenolic novolak-type epoxy resins, such as the A-type novolak-type epoxy resin, brand name EPICOAT154 (made by Japan Epoxy Resins Co., Ltd.), brand name YDPN-638 (made by Toto Kasei Co., Ltd.), brand name YDCN-701 (made by Toto Kasei Co., Ltd.) Cresol novolac type epoxy resin, Dicyclopentadiene phenol type epoxy resins, such as a brand name EPICLON HP-7200 (made by DIC Corporation), Trihydroxy phenylmethane type epoxy resins, such as brand name EPICOAT1032H60 (made by Japan Epoxy Resins Co., Ltd.), brand name VG3101M80 (Mitsuika Tetrafunctional epoxy resins such as Gakusa Co., Ltd., tetraphenyrolethane type epoxy resins such as EPICOAT1031S (manufactured by Japan Epoxy Resins Co., Ltd.), and tetrafunctional epoxy resins such as the brand name DENACOL EX-411 (manufactured by Nagase ChemteX Corporation). Epoxy resin, Hydrogenated bisphenol-A epoxy resin, such as brand name ST-3000 (made by Toto Kasei Co., Ltd.), Glycidyl ester type epoxy resin, such as brand name EPICOAT190P (made by Japan Epoxy Resins Co., Ltd.), brand name YH-434 Glycidylamine type epoxy resins, such as (made by Toto Kasei Co., Ltd.), Glyoxal type epoxy resins, such as brand name YDG-414 (made by Toto Kasei Co., Ltd.), brand name eporide GT-401 (made by DAICEL CHEMICAL INDUSTRIES, LTD.), Etc. Alicyclic Polyfunctional Epoxy Compounds, Triggles Sidil isocyanate (TGIC) and the like can be given complex cyclic epoxy resins such as. Moreover, if necessary, brand name NEO TOHTO E (made by Toto Kasei Co., Ltd.) etc. can be mixed as an epoxy reactive diluent.

Moreover, as an acrylate monomer and a methacrylate monomer which are acryl-type monomers, as a trifunctional monomer, a trimethol propane triacrylate, a trimetholpropane PO (propylene oxide) modified triacrylate, and a trimetholpropane EO (ethylene oxide) modified tree An acrylate, a trimethol propane trimethacrylate, a pentaerythritol triacrylate is mentioned. Moreover, as a tetrafunctional or more than four functional monomer and oligomer, for example, pentaerythritol tetraacrylate, pentaerythritol tetramethacrylate, dipentaerythritol pentaacrylate, dipentaerythritol pentamethacrylate, dipentaerythritol hexaacrylate, dipentaerythritol Hexamethacrylate etc. can be illustrated.

Moreover, as an oxetanyl group containing monomer which is an oxetanyl-type monomer, the compound of Paragraph No. [0021]-[0084] of Unexamined-Japanese-Patent No. 2003-341217 can be used preferably. Moreover, the compound of Paragraph No. [0022]-[0058] of Unexamined-Japanese-Patent No. 2004-91556 can also be used.

Hereinafter, although the specific example ([O-1]-[O-25]) of the compound which has an oxetanyl group is listed, this invention is not limited to these.

The compound (oxetanyl group-containing monomer) having these oxetanyl groups is preferably 0.1 to 70% by mass, more preferably 0.5 to 60% by mass, still more preferably 1 to 50% by mass relative to the composition solids. Can be added. In addition, the said oxetanyl group containing monomer (oxetane type compound) may use only 1 type, or may use 2 or more types together.

You may use together a monofunctional monomer and a bifunctional monomer suitably in order to reduce the viscosity of the coloring composition for color filters, and to accelerate the polymerization reaction of a pixel part. When these monofunctional monomers and a bifunctional monomer are used together, the viscosity of a coloring composition falls and the effect which prevents a nozzle clogging is acquired. Examples of these monofunctional monomers or bifunctional monomers include the monofunctional epoxy group-containing monomers described in paragraph [0065] of JP 2001-350012 A and paragraph number 0015 of JP 2002-371216 A. Monofunctional or bifunctional acrylate monomers described in -0016 and methacrylate monomers, and the monofunctional monomer described in "market prospects of reactive monomers" by CMC plates.

In addition, for the purpose of replenishing the strength of the film or providing adhesion to the substrate, a high-polar monomer such as a high viscosity polyfunctional monomer, a urethane acrylate, or an oligomer may be used. There is no restriction | limiting in particular as a preferable polyfunctional monomer, a high polar monomer, and an oligomer, A general purpose thing can be used. For example, dipentaerythritol hexaacrylate, isocyanuric acid EO modified diacrylate, isocyanuric acid EO modified triacrylate, ε-caprolactone modified tris (acryloxyethyl) isocyanurate, urethane acrylate ( For example, ALONICS M-1000, M-1200, M-1210, M-1600 by Toagosei Co., Ltd., polyester acrylate (For example, ALONICS M-6100, M-6200 by Toagosei Co., Ltd., M-6250, M-6500, M-7100, M-7300K, M-8030, M-8060, M-8100, M-8530, M-8560, M-9050), etc. are mentioned.

20 mass% or more is preferable with respect to solid content, and, as for content of these polyfunctional monomers, a high polar monomer, and an oligomer in the coloring composition for color filters of the said polymerizable monomer, 30 mass% or more is more preferable, 40 mass% The above is more preferable. When the content of the monomer is 20% by mass or more, the polymerization of the pixel portion is good, so that the occurrence of a scar due to the lack of film strength of the pixel portion is less likely to occur, or when cracking or reticulation is difficult to occur when the transparent conductive film is applied. The effect that solvent resistance at the time of forming an oriented film improves, or does not reduce voltage retention is acquired. Here, the solid content of the coloring composition for specifying the blending ratio includes all components except the solvent, and the liquid polymerizable monomer and the like are also included in the solid content.

(bookbinder)

As for the coloring composition for color filters of this invention, it is preferable to use a binder for the purpose of adjustment of a coloring composition viscosity, adjustment of the hardness of a pixel, and control of a pixel shape, for example.

As a binder, you may use only the dry solidified binder resin which consists only of resin which is not polymerizable by itself. Specifically, epoxy resin, diallyl phthalate resin, silicone resin, phenol resin, unsaturated polyester resin, polyimide resin, polyurethane resin, melamine resin, urea resin, ionomer resin, ethylene ethyl acrylate resin, acrylonitrile Acrylate styrene copolymer resin, acrylonitrile styrene resin, acrylonitrile chloride polyethylene styrene copolymer resin, ethylene vinyl acetate resin, ethylene vinyl alcohol copolymer resin, acrylonitrile butadiene styrene copolymer resin, vinyl chloride resin, chlorinated polyethylene resin, polychlorinated Vinylidene resin, cellulose acetate resin, fluorine resin, polyoxymethylene resin, polyamide resin, polyarylate resin, thermoplastic polyurethane elastomer, polyether ether ketone resin, polyether sulfone resin, polyethylene, polypropylene, polycarbide Polycarbonate, Polystyrene, Polystyrene Resin copolymer resin, polystyrene acrylic acid copolymer resin, polyphenylene ether resin, polyphenylene sulfide resin, polybutadiene resin, polybutylene terephthalate resin, acrylic resin, methacrylic resin, methylpentene resin, polylactic acid, polybutylene stone Cyanate resin, butyral resin, formal resin, polyvinyl alcohol, polyvinylpyrrolidone, ethyl cellulose, carboxymethyl cellulose, gelatin, and copolymerized resins thereof. These can be suitably selected in consideration of film strength, coloring composition viscosity, coloring composition residual viscosity, pigment dispersion stability, thermal stability, non-coloring property, water resistance, and chemical resistance.

Although the addition amount of a binder is not specifically limited, 0.1-70 mass parts is preferable with respect to 100 mass parts of solid content of the coloring composition for color filters. The binder resin may be used after being dissolved in a solvent, or may be used after being dispersed in a solvent. When disperse | distributing to a solvent and using, 1.0 micrometer or less is preferable and, as for the average particle diameter of the binder resin to be dispersed, 0.1 micrometer or less is more preferable. If it is 1.0 micrometer or more, the blockage in a head, the transparency of a film | membrane, and the fall of smoothness may arise.

Moreover, since binder resin may raise the viscosity of a coloring composition, it is also preferable not to use a binder resin essentially.

In addition, in order to impart sufficient strength, durability, and adhesion to the colored composition for curing after curing, it is preferable to use a binder resin capable of curing the pattern by a polymerization reaction after forming a pattern on the substrate by an inkjet method. Do. For example, a photocurable binder resin that can be polymerized and cured by visible rays, ultraviolet rays, electron beams, or the like, or a thermosetting binder resin that can be polymerized and cured by heating can be used.

(1) photocurable binder resins

The photocurable resin (photocurable binder resin) which can be polymerized and cured by light such as ultraviolet rays or electron beams is a polymer having a relatively high molecular weight for the purpose of imparting shape stability and adhesion to the base of the droplets of the given colored composition. It may contain. Relatively large molecular weight here means larger molecular weight than a so-called monomer or oligomer. As the polymer having a relatively high molecular weight, any of a polymer which is not polymerizable in itself and a polymer which is polymerizable in itself may be used, or may be used in combination of two or more thereof.

As the polymer having no polymerization reactivity, for example, a copolymer consisting of two or more of the following monomers can be used: acrylic acid, methacrylic acid, methyl acrylate, methyl methacrylate, 2-hydroxyethyl acrylate, 2- Hydroxyethyl methacrylate, benzyl acrylate, benzyl methacrylate, styrene, polystyrene macro monomers, and polymethyl methacrylate macro monomers.

More specifically, methacrylic acid / benzyl methacrylate copolymer, methacrylic acid / benzyl methacrylate / styrene copolymer, benzyl methacrylate / styrene copolymer, benzyl methacrylate macromonomer / styrene copolymer, benzyl Methacrylate / styrene macromonomer copolymer, etc. can be illustrated.

As a polymer which itself has polymerization reactivity, it is possible to use a polymer that undergoes a polymerization reaction by receiving light irradiation to generate a polymerization reaction by itself, or by action of another component such as a photopolymerization initiator activated by light irradiation.

Various ethylenic double bond containing compounds have polymerization reactivity itself, and can be used as photocurable resin. Conventionally, the prepolymer mix | blended with the UV curable resin composition used for various fields, such as an ink, a coating material, an adhesive agent, can be used as a comparatively high molecular weight polymer in this invention. Conventionally known prepolymers include radical polymerization prepolymers, cationic polymerization prepolymers, thiol-ene addition type prepolymers, and the like.

Among these, radically polymerizable prepolymers are those that are most readily available on the market, such as ester acrylates, ether acrylates, urethane acrylates, epoxy acrylates, amino resin acrylates, Acrylic resin acrylates, unsaturated polyesters, etc. can be illustrated.

In the present invention, the molecular weight of the ethylenic double bond-containing compound, which is a polymer itself having polymerization reactivity, from the viewpoint of preventing the viscosity of the coloring composition from being too high to adversely affect the dischargeability from the discharge head, is 100,000 or less in terms of weight average molecular weight. desirable.

The said relatively large molecular weight polymer can be mix | blended in the ratio of 1-50 mass% normally with respect to solid content whole quantity of a coloring composition.

(2) thermosetting binder resins

As a thermosetting binder resin, the combination of the compound and the hardening | curing agent which have two or more thermosetting functional groups in 1 molecule is used normally, You may add the catalyst which can accelerate | stimulate a thermosetting reaction. As a thermosetting functional group, an epoxy group is used preferably. Moreover, you may use further the polymer which does not itself superpose | polymerize reactivity to these.

As a compound which has two or more thermosetting functional groups in one molecule, the epoxy compound which has two or more epoxy groups in one molecule is used normally. An epoxy compound having two or more epoxy groups in one molecule is an epoxy compound having two or more epoxy groups, preferably 2 to 50, more preferably 2 to 20, in one molecule (including those called epoxy resins). to be. The epoxy group may be a structure having an oxirane ring structure, and may represent, for example, a glycidyl group, an oxyethylene group, an epoxycyclohexyl group, or the like. As an epoxy compound, the well-known polyhydric epoxy compound which can be hardened by a carboxylic acid is mentioned, Such an epoxy compound is widely disclosed, for example by Shinbo Masaki edition "Epoxy resin handbook" daily industrial newspaper (1987), etc. , It is possible to use them.

As an epoxy compound, it is preferable to use a comparatively large molecular weight polymer and a comparatively small molecular weight compound together. By using a polymer having a relatively high molecular weight, solvent resistance and heat resistance can be imparted to the cured film. In addition, by using a compound having a relatively small molecular weight, the crosslinking density of the cured film can be increased, and the inkjet ejection performance can be improved by lowering the viscosity.

As an epoxy compound (henceforth a "binder-like epoxy compound") which is a comparatively large molecular weight polymer, at least 1 type of the structural unit represented by following formula (2) and at least 1 sort (s) of the structural unit represented by following formula (1). The polymer which consists of 1 type and has 2 or more glycidyl groups can be used.

In formula, R <^1> is a hydrogen atom or a C1-C3 alkyl group, and R <^2> is a C1-C12 hydrocarbon group. R ³ is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms.

The structural unit represented by Formula (1) can be derived from the monomer represented by following formula (3). According to the following formula (3), R ¹ and R ² are the same meanings as R ¹ and R ² in the formula (1).

By using the monomer represented by the said Formula (3) as at least 1 sort (s) of the structural unit of a binder epoxy compound, favorable hardness and transparency can be provided to the colored pixel formed from the coloring composition for color filters of this invention. In formula (3), R <^2> is a C1-C12 hydrocarbon group, and may be a linear aliphatic, alicyclic, or aromatic hydrocarbon group, and also an additional structure, for example, a double bond, a side chain of a hydrocarbon group, and a spiro It may contain a side chain of a ring, a crosslinked hydrocarbon group in a ring, and the like.

As a monomer represented by the said Formula (3), specifically, methyl (meth) acrylate, ethyl (meth) acrylate, i-propyl (meth) acrylate, n-propyl (meth) acrylate, i-butyl ( Meth) acrylate, n-butyl (meth) acrylate, t-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, hexyl (meth) acrylate, octyl (meth) acrylate, lauryl ( Meta) acrylate, cyclohexyl (meth) acrylate, para-t-butylcyclohexyl (meth) acrylate, isobornyl (meth) acrylate, benzyl (meth) acrylate, dicyclopentenyl (meth) acrylic The rate, phenyl (meth) acrylate, etc. can be illustrated.

In Formula (3), what is preferable as R <^1> is a hydrogen atom or a methyl group, What is preferable as R <^2> is a C1-C12 alkyl group, Especially, a methyl group and a cyclohexyl group are especially preferable. Specific examples of the monomer represented by the formula (3) include methyl methacrylate (MMA) and cyclohexyl methacrylate (CHMA).

The structural unit represented by Formula (2) in a polymer is derived from the monomer represented by following formula (4). According to the following formula (4), R ³ has the same meaning as R ³ in the formula (2).

The monomer represented by the said Formula (4) can be used, for example in order to introduce an epoxy group (epoxy reaction point) in a polymer.

In Formula (4), what is preferable as R <^3> is a hydrogen atom or a methyl group. Specifically, glycidyl (meth) acrylate can be illustrated as a monomer represented by Formula (4), and glycidyl methacrylate (GMA) is especially preferable.

The polymer may be a random copolymer or a block copolymer. Moreover, the said polymer may contain main chain structural units other than Formula (1) or Formula (2), as long as the performance required for each detail of a color filter, for example, hardness, transparency, etc. can be ensured. As such a monomer, an acrylonitrile, styrene, etc. can be mentioned specifically ,.

The content of the structural unit of the formula (1) and the structural unit of the formula (2) in the binder epoxy compound is the addition of a monomer to induce the structural unit of the formula (1) and the monomer to induce the structural unit of the formula (2) When represented by a weight ratio (monomer which derives Formula (1): monomer which derives Formula (2)), it is preferable to exist in the range of 10: 90-90: 10.

Since the ratio of the reaction point of hardening can be made large by the quantity of the structural unit of Formula (1) being said ratio 90:10 or less, crosslinking density can be made higher. On the other hand, since the ratio of the bulky skeleton can be increased by the amount of the structural unit of formula (2) being 10:90 or less, the curing shrinkage can be suppressed.

The weight average molecular weight of the binder epoxy compound is preferably 3,000 or more, particularly 4,000 or more, when expressed in terms of polystyrene reduced weight average molecular weight. When the weight average molecular weight of the said binder epoxy compound is 3,000 or more, physical properties, such as intensity | strength and solvent resistance required for the pixel as the detail of a color filter, become favorable.

Moreover, when the weight average molecular weight of the said binder epoxy compound is represented by the weight average molecular weight in polystyrene conversion, it is preferable that it is 20,000 or less, and it is especially preferable that it is 15,000 or less. When the said molecular weight is 20,000 or less, a viscosity rise can be suppressed and stability of the discharge amount at the time of discharging a coloring composition from a discharge head, and the straightness of a discharge direction become favorable. In addition, the stability of long-term storage becomes good.

As the binder epoxy compound, it is particularly preferable to use a glycidyl methacrylate (GMA) / methyl methacrylate (MMA) copolymer having a polystyrene reduced weight average molecular weight (Mw) in the above range. The GMA / MMA copolymer may contain other monomer components as long as the object of the present invention can be achieved.

(Polymerization initiator)

In the coloring composition for color filters of this invention, you may use a polymerization initiator together for the purpose of promoting the polymerization reaction of a monomer and a binder. A polymerization initiator can be selected according to the kind of monomer and binder used for a coloring composition, and a polymerization path.

(1) Polymerization initiator suitable for acrylate (methacrylate) monomer and photocurable binder resin

As a preferable polymerization initiator for an acrylate monomer, a methacrylate monomer, and a photocurable binder resin, a photoinitiator is used when the polymerization of the pixel portion is carried out by an active energy ray, and a thermal polymerization initiator is used when the polymerization of the pixel portion is performed by heat. do. As a photoinitiator, the thing of Paragraph No. [0079]-[0088] of Unexamined-Japanese-Patent No. 2006-28455 is mentioned, for example, As a preferable specific example, 2-trichloromethyl-5- (p-styryl styryl ) -1,3,4-oxadiazole or 2,4-bis (trichloromethyl) -6- [4 '-(N, N-bisethoxycarbonylmethylamino) -3'-bromophenyl ] -s-triazines.

As the thermal polymerization initiator, generally known organic peroxide compounds and azo compounds can be used. This makes it possible to improve the intensity of the pixel portion. Moreover, in addition to a thermal polymerization initiator, hardening catalysts, such as imidazole, can also be used. The organic peroxide-based compound and the azo-based compound can be used in combination of two or more in addition to being used alone. Herein, the organic peroxide is a derivative of hydrogen peroxide (H-O-O-H), and refers to an organic compound having an -O-O- bond in its molecule.

If classified by chemical structure, ketone peroxide, peroxy ketal, hydroperoxide, dialkyl peroxide, diacyl peroxide, peroxy ester, peroxy carbonate, etc. are mentioned. Specifically 3,3 ', 4,4'-tetrakis (t-butylperoxycarbonyl) benzophenone, benzoyl peroxide, 2,2-bis (4,4-di-t-butylperoxycyclohexyl Propane, 1,1-bis (t-hexylperoxy) -3,3,5-trimethylcyclohexane, t-butylperoxybenzoate, di-t-butylperoxybenzoate, di-t-butyl Peroxyisophthalate, t-butylperoxyacetate, t-hexyl peroxybenzoate, t-butylperoxy-3,5,5-trimethylhexanoate, t-butylperoxy laurate, t-butylperoxy Isopropyl monocarbonate, t-butylperoxy-2-ethylhexyl monocarbonate, 2,5-bis (m-toluylperoxy) hexane, 2,5-dimethyl-2,5-bis (benzoylper Oxy) hexane, t-hexyl peroxy isopropyl monocarbonate,

t-butylperoxy isobutylate, 1,1,3,3-tetramethylbutylperoxy-2-ethylhexanoate, t-hexylperoxyisopropyl monocarbonate, 2,5-dimethyl-2, 5-bis (2-ethylhexanoylperoxy) hexane, t-butylperoxy-2-ethylhexanoate, t-butylperoxy maleic acid, cyclohexanone peroxide, methylacetoacetate peroxide, methylhexanonper Oxide, acetylacetone peroxide, 1,1-bis (t-hexylperoxy) cyclohexane, 1,1-bis (t-butylperoxy) -3,3,5-trimethylcyclohexane, 1,1-bis (t-butylperoxy) -2-methylcyclohexane, 1,1-bis (t-butylperoxy) cyclohexane, 2,2-bis (t-butylperoxy) butane, 2,2-bis (4 , 4-di-t-butylperoxycyclohexyl) propane, diisopropylbenzenehydroperoxide, 1,1,3,3-tetramethylbutyl hydroperoxide, cumene hydroperoxide, t-butylhydroperoxide, etc. Is preferred, and among them, 2,2- Peroxy ketal compounds, such as s (4,4-di-t-butyl peroxy cyclohexyl) propane, diacyl peroxide compounds, such as benzoyl peroxide, and peroxy ester compounds, such as t-butyl peroxy benzoate This is more preferable.

Moreover, as said azo compound, the compound of Paragraph No. [0021]-[0023] of Unexamined-Japanese-Patent No. 5-5014 is mentioned, for example. Among these compounds, a compound having a high decomposition temperature is stable at room temperature and is decomposed when heat is applied to generate radicals, and a compound which becomes a polymerization initiator is preferable. Among the organic peroxide compounds or azo compounds (thermal polymerization initiators), when the half life temperature is relatively high (preferably 50 ° C. or higher, more preferably 80 ° C. or higher), the viscosity of the composition does not change over time. Can be configured. For example, azobis (cyclohexane-1-carbonitrile) etc. are mentioned as a preferable thermal polymerization initiator.

As for content of the photoinitiator and / or thermoinitiator suitable for an acrylate monomer, a methacrylate monomer, and a photocurable binder resin, 0.1-10 mass% is preferable with respect to solid content of a coloring composition, More preferably, it is 0.3-5 mass% to be. When content of a polymerization initiator is 0.1 mass% or more with respect to a monomer, the effect as a polymerization initiator can fully be exhibited, and when it is 10 mass% or less, the time-dependent change of the viscosity of a coloring composition is suppressed, or generation | occurrence | production of coloring by the decomposition product of a polymerization initiator is suppressed. You can prevent it.

These initiators can also be used 1 type or in combination of 2 or more types.

(2) Polymerization initiator suitable for oxetanyl group-containing monomer or binder resin

As a preferable polymerization initiator for an oxetanyl group containing monomer or binder resin, the compound which produces | generates an acid is mentioned. The acid generating compound in the present invention means a compound capable of generating an acid by light or heat after discharging the coloring composition. Any compound or acid generating compound can be used as long as it can generate brendic acid and Lewis acid by the action of light and / or heat in the droplets of the colored composition after discharge.

Examples of the acid to be produced include carboxylic acid, sulfonic acid, phosphoric acid, phosphoric acid monoester, phosphoric acid diester, sulfuric acid, sulfuric acid monoester, sulfinic acid, hydrochloric acid, nitric acid, boric acid, trifluoroboric acid, boron complexes, antimony derivatives and hexafluorophosphoric acid. Etc. can be mentioned.

Especially, as an acid which can harden | cure the said oxetanyl group containing monomer (oxetane compound) by light and / or heat, it is preferable to generate hydrochloric acid, a sulfonic acid, or the acid which has a boron atom or a phosphorus atom, and phosphorus It is most preferable to generate an acid having an atom.

As a specific compound (photoinitiator) which generate | occur | produces such an acid, an organic halogenated compound, an oxydiazole compound, an organic borate compound, a disulfone compound, an oxime ester compound, an onium salt compound is mentioned, for example, an iodonium salt or Onium hydrochloric acid generators, such as a sulfonium salt, are used preferably.

As an organic halogenated compound, specifically Wakabayashi etc., "Bull Chem. Soc Japan '' 42, 2924 (1969), US Patent No. 3,905,815, Japanese Patent Publication No. 46-4605, Japanese Patent Publication No. 48-36281, Japanese Patent Publication No. 55-32070, Japanese Patent Publication JP-A-60-239736, JP-A-61-169835, JP-A-61-169837, JP-A-62-58241, JP-A-62-212401, JP-A JP-A-63-70243, JP-A-63-298339, M.P. The compound described in Hutt "Jurnal of Heterocyclic Chemistry" 1 (No3), (1970) "etc. is mentioned, In particular, the oxazole compound which has a trihalomethyl group, the s-triazine compound is mentioned.

As an organic borate compound, For example, Unexamined-Japanese-Patent No. 62-143044, Unexamined-Japanese-Patent No. 62-150242, Unexamined-Japanese-Patent No. 9-188685, Unexamined-Japanese-Patent No. 9-188686, Unexamined-Japanese-Patent No. 9- 188710, Japanese Patent Laid-Open No. 2000-131837, Japanese Patent Laid-Open No. 2002-107916, Japanese Patent No. 2764769, Japanese Patent Application No. 2000-310808, etc., and Kunz, Martin "Rad Tech '98. Proceeding April Organic borate salts described in Japanese Patent Application Laid-Open No. 6-157623, Japanese Patent Application Laid-Open No. 6-175564, Japanese Patent Application Laid-Open No. 6-175561 or the like. Organoboron oxo sulfonium complex, the organoboron iodonium complex of Unexamined-Japanese-Patent No. 6-175554, the organic boron phosphonium complex of Unexamined-Japanese-Patent No. 9-188710, Japanese Unexamined Patent Publication No. 6-348011 Specific examples include organic boron transition metal coordination complexes such as Japanese Patent Application Laid-Open No. 7-128785, Japanese Patent Application Laid-Open No. 7-140589, Japanese Patent Application Laid-Open No. 7-306527, Japanese Patent Application Laid-Open No. 7-292014, and the like. It can be mentioned as.

As a disulfone compound, the compound etc. which were described in Unexamined-Japanese-Patent No. 61-166544, Japanese Patent Application No. 2001-132318, etc. are mentioned.

Examples of oxime ester compounds include JCS Perkin II (1979) 1653-1660), JCS Perkin II (1979) 156-162, Journal of Photoplymer Science and Technology (1995) 202-232, Japanese Patent Laid-Open No. 2000-66385, and Japanese Patent The compound described in Unexamined-Japanese-Patent No. 2000-80068, Unexamined-Japanese-Patent No. 2004-534797, etc. are mentioned.

As an onium salt compound, it is S.I. Schlesinger, Photogr. Sci. Diazonium salt described in Eng., 18,387 (1974), T. S. Bal et al, Polymer, 21,423 (1980), ammonium salt described in US Patent No. 4,069,055, Japanese Patent Application Laid-Open No. 4-365049, US Patent Phosphonium salts described in the specifications of Nos. 4,069,055 and 4,069,056, European Patent 104,143, US Patents 339,049, and Japanese Patent Nos. Hei 2-150848, Japanese Patent Laid-Open No. 2-296514 The iodonium salt etc. which were described in each publication of the arc are mentioned.

The iodonium salt is a diaryl iodonium salt, and from the viewpoint of stability, it is preferable that two or more iodonium salts are substituted with an electron donating group such as an alkyl group, an alkoxyl group, or an aryloxy group. More preferably, it is preferable that an alkoxyl group is substituted by 3 or more substituted, most preferably 4 or more substituted. Moreover, at least one of the diaryl forms a part of the chromophore which has absorption in 300 nm or more as a form of the other preferable diaryl iodonium salt which is excellent in sclerosis | hardenability by light. Or the iodonium salt etc. which have a functional group which has absorption in 300 nm or more as a substituent are preferable.

As sulfonium salts, European Patent Nos. 370,693, 390,214, 233,567, 297,443, 297,442, 4,933,377, 161,811, 410,201, 339,049, 4,760,013, 4,734,444 And sulfonium salts described in each specification of Nos. 2,833,827, German Patent Nos. 2,904,626, 3,604,580, and 3,604,581. It is preferable that they are substituted with electron-withdrawing groups from the sensitivity point of stability. As an electron withdrawing group, a thing whose Hammet value is larger than 0 is preferable. Preferred electron withdrawing groups include halogen atoms, carboxylic acids and the like.

Moreover, as another preferable sulfonium salt, it is a triaryl sulfonium salt from a viewpoint of thermal decomposition, stability, and photocurability when used together with a sensitizer, etc., It is preferable to have at least 1 electron-withdrawing group, such as a halogen atom and a carboxy group, More preferably, it is 2 or more substituted, Most preferably, it is 3 or more substituted.

Moreover, the sulfonium salt in which one substituent of a triarylsulfonium salt has a coumarin and an anthquinone structure as a form of another preferable sulfonium salt, and has absorption in 300 nm or more is mentioned. Another preferable sulfonium salt is one in which at least one of triaryl forms part of a chromophore having an absorption at 300 nm or more as the triarylsulfonium salt. Or the triarylsulfonium salt etc. which have a functional group which has absorption in 300 nm or more as a substituent are preferable.

Moreover, as an onium salt compound, J. V. Crivello et al, Macromolecules, 10 (6), 1307 (1977), J.V. Crivello et al, J. Polymer Sci., Polymer Chem. Selenium salts described in Ed., 17, 1047 (1979), C. S. Wen et al, Teh, Proc. Conf. Rad. Onium salts, such as the arsonium salt as described in Curing ASIA, p478 Tokyo, Oct (1988), etc. are mentioned.

It is preferable that content of the polymerization initiator preferable for the said oxetanyl group containing monomer or binder resin is 0.1-30 mass% with respect to the total solid contained in a coloring composition, More preferably, it is 0.5-25 mass%, Especially preferably, 1 It is -20 mass%. Within this range, a better sensitivity and a firm hardened portion can be formed. Moreover, the compound which generate | occur | produces the said acid can be used 1 type or in mixture of 2 or more types.

Curing agent

Epoxy type monomers (epoxy group-containing monomers) and thermosetting binder resins are usually used in combination with a curing agent.

As a hardening | curing agent, the hardening | curing agent and accelerator which are described in Chapter 3 of the General Epoxy Resin Foundation Part I issued November 19, 2003, Chapter 3 can be used suitably, For example, polyhydric carboxylic anhydride or polyhydric carboxyl. Acids can be used.

Specific examples of the polyhydric carboxylic anhydride include phthalic anhydride, itaconic anhydride, succinic anhydride, citraconic anhydride, dodecenyl succinic anhydride, tricarbaric acid, maleic anhydride, hexahydrophthalic anhydride, dimethyltetrahydrophthalic anhydride, and anhydride. Aliphatic or cycloaliphatic dicarboxylic anhydrides such as hymic acid and nazinic anhydride; Aliphatic polyhydric carboxylic dianhydrides such as 1,2,3,4-butanetetracarboxylic dianhydride and cyclopentane tetracarboxylic dianhydride; Aromatic polyhydric carboxylic anhydrides such as pyromellitic anhydride, trimellitic anhydride, and benzophenone tetracarboxylic acid anhydride; Ester group containing acid anhydrides, such as ethylene glycol bistrimerate and glycerol tristrimerate, are mentioned, Especially preferably, aromatic polyhydric carboxylic anhydride is mentioned. Moreover, the epoxy resin hardener which consists of a commercially available carboxylic anhydride can also be used preferably.

Moreover, as a specific example of polyhydric carboxylic acid, Aliphatic polyhydric carboxylic acid, such as succinic acid, glutaric acid, adipic acid, butane tetracarboxylic acid, maleic acid, itaconic acid; Aliphatic polyhydric carboxylic acids such as hexahydrophthalic acid, 1,2-cyclohexane dicarboxylic acid, 1,2,4-cyclohexane tricarboxylic acid, cyclopentanetetracarboxylic acid, and phthalic acid, isophthalic acid, tereph Aromatic polyhydric carboxylic acid, such as deoxidation, a pyromellitic acid, trimellitic acid, 1,4,5,8-naphthalene tetracarboxylic acid, benzophenone tetracarboxylic acid, Preferably aromatic polyhydric carboxylic acid Can be mentioned.

Moreover, it is preferable to use vinyl ether block carboxylic acid for polyhydric carboxylic acid. Specifically, the vinyl ether block carboxylic acid described in "General Epoxy Resin Basic Part I" P193 to 194 published by the Epoxy Resin Technical Association, Japanese Patent Application Laid-Open No. 2003-66223, and Japanese Patent Application Laid-Open No. 2004-339332 is mentioned. By blocking carboxylic acid with vinyl ether, addition reaction (esterification reaction) of carboxylic acid and an epoxy compound progresses gradually at room temperature, and it can suppress that a coloring composition viscosity rises with time. In addition, the solubility in various solvents, epoxy monomers, and epoxy resins is improved, and a uniform composition can be made. It is preferable to use this vinyl ether block carboxylic acid together with the heat latent catalyst mentioned later. By using together with a heat latent catalyst, a deblocking reaction is accelerated | stimulated at the time of heating, the film | membrane decreases at the time of heating, and a color filter with a higher intensity | strength can be formed.

These polyhydric carboxylic anhydrides and polyhydric carboxylic acid can be used individually by 1 type or in mixture of 2 or more types. The compounding quantity of the hardening | curing agent used for this invention is a range of 1-100 mass parts normally per 100 mass parts of components (monomer and resin) containing an epoxy group, Preferably it is 5-50 mass parts. By making the compounding quantity of a hardening | curing agent into 1 mass part or more, sclerosis | hardenability becomes favorable and a strong pixel can be formed. Moreover, by making the compounding quantity of a hardening | curing agent into 100 mass parts or less, adhesiveness with respect to the board | substrate of the formed pixel can be made favorable and a uniform and smooth pixel can be formed.

(Thermal latent catalyst)

In the present invention, when using an epoxy group-containing monomer or a thermosetting binder resin, a catalyst capable of promoting an acid-epoxy thermal curing reaction may be added in order to improve the hardness and heat resistance of the pixel. As such a catalyst, a thermal latent catalyst which shows activity at the time of heat curing can be used.

When the latent heat catalyst is heated, it exhibits catalytic activity, promotes a curing reaction, imparts good physical properties to the cured product, and is added as necessary. It is preferable that this thermal latent catalyst exhibits an acidic catalyst activity at a temperature of 60 ° C or higher. Examples of such thermal latent catalysts include compounds neutralized with protonic acid with Lewis bases, compounds neutralized with Lewis acid with Lewis bases, mixtures of Lewis acid and trialkylphosphates, sulfonic acid esters, onium compounds, and the like. Various compounds described in Unexamined Patent Publication No. Hei 4-218561 can be used.

Specifically,

(A) Compound which neutralized halogen carboxylic acid, sulfonic acid, monophosphoric acid, diester, etc. with various amine, such as ammonia, monomethylamine, triethylamine, pyridine ethanolamine, or trialkyl phosphine.

_{(B) BF 3, FeCl 3, SnCl} 4, AlCl 3, ZnCl 2 , such as a compound neutralizing the Lewis acid with a Lewis base of the above.

(C) Ester compounds of methane sulfonic acid, ethane sulfonic acid, benzene sulfonic acid and the like, primary alcohols and secondary alcohols.

(D) Phosphoric acid monoester compounds of primary alcohols, secondary alcohols, phosphoric acid diester compounds, and the like.

In addition, onium ammonium compound ^{[R 1 NR 2 R 3 R} 4] + X As the ^compound, a sulfonium compound ^{[R 1 SR 2 R 3]} + X -, oxonium compound ^{[R 1 OR 2 R 3]} + X - , etc. Can be mentioned. In addition, where the R ¹ ~R ⁴ shows the like alkyl group, an alkenyl group, an aryl group, an alkoxyl group.

The heat latent catalyst is preferably a halogen-free acidic catalyst from the viewpoint of liquid crystal contamination. Specifically as a halogen-free acidic catalyst, NOFCURE LC-1 and NOFCURE LC-2 (all are brand names, the Nippon Yushi Corporation make) can be illustrated.

(Surfactants)

The coloring composition for color filters of this invention can be comprised using surfactant.

As an example of surfactant, Paragraph No. of Unexamined-Japanese-Patent No. 7-216276, surfactant disclosed in Unexamined-Japanese-Patent No. 2003-337424, and Unexamined-Japanese-Patent No. 11-133600 are mentioned as a preferable thing. Can be mentioned. As for content of surfactant, 5 mass% or less is preferable with respect to coloring composition whole quantity.

(Etc)

As another additive, the other additive of Paragraph No. 0058 of Unexamined-Japanese-Patent No. 2000-310706-[0071] is mentioned.

(Property value)

Next, the physical property value of the coloring composition for color filters of this invention is demonstrated.

It is preferable that the viscosity at 20 degrees C of the coloring composition of this invention is 2-100 mPa * s. When discharging a coloring composition to an apparatus, it is preferable to keep the temperature of a coloring composition at substantially constant temperature in the range of 20-90 degreeC, and it is preferable to make the viscosity of the coloring composition at that time into 2-30 mPa * s. Moreover, as for the surface tension of the coloring composition in 25 degreeC, 10-50 mN / m is preferable. When discharging a coloring composition to an apparatus, it is preferable to keep the temperature of a coloring composition at a substantially constant temperature in 20-90 degreeC, and it is preferable to make the surface tension of the coloring composition at that time be 20-40 mN / m.

In order to keep the temperature of a coloring composition constant with predetermined precision, according to the detection means which detects a coloring composition temperature, the heating means or cooling means which heat or cool a coloring composition, and the temperature of the coloring composition detected by the detection means. It is preferable to provide control means for controlling heating or cooling. Moreover, it is also preferable to have a means to reduce the influence on the physical property change of the coloring composition for color filters by controlling the energy applied to the discharge means which discharges a coloring composition according to the temperature of a coloring composition.

In addition, in order to properly maintain the shape in which the color composition for color filters wetted after the substrate is impregnated, it is preferable to keep the physical properties of the coloring composition after being impregnated on the substrate, and for this purpose, the substrate and / or the vicinity thereof are prescribed. It is desirable to keep it within the temperature range. Alternatively, it is also effective to reduce the influence of temperature change by a method such as increasing the heat capacity of the die supporting the substrate.

<Color filter and its manufacturing method>

The color filter of this invention is comprised using the coloring composition for color filters of this invention mentioned above. When the color filter of this invention is manufactured using the said coloring composition for color filters, the wettability at the time of being provided on a board | substrate becomes favorable, flatness can be obtained, and generation | occurrence | production of image defects, such as a color fallout, can be suppressed.

Specifically, the color filter of this invention provides the coloring composition provision process of providing the droplet of the coloring composition for color filters of this invention mentioned above by the inkjet method to the recessed part on the board | substrate partitioned by partitions, such as a black matrix, and at least the said It is preferable that it is produced by the manufacturing method of the color filter comprised by providing the heating process which heat-processes a droplet. Moreover, in the manufacturing method of the said color filter, Preferably, the hardening process of hardening | curing the formed at least 1 color layer by irradiation of an active energy ray can further be provided. Moreover, a partition is previously formed on a board | substrate before a coloring composition provision process. The detail of the formation method of a partition is mentioned later.

-Coloring composition provision process-

In a coloring composition provision process, the droplet of a coloring composition is given to the recessed part on the board | substrate partitioned by partitions (dark isolation wall), such as a black matrix, by an inkjet method, and a colored layer is formed. This colored layer can be made into colored pixels, such as red (R), green (G), and blue (B) which comprise a color filter, for example.

As described later, a colored layer is formed into a plurality of two or more colors by infiltrating a coloring composition for forming colored pixels (for example, a pixel pattern of RGB tricolor) into recesses on the substrate partitioned by partitions formed on the substrate. It can form by forming a pixel.

The shape of the color filter pattern is not particularly limited, and may be a black stripe shape, a general stripe shape, a lattice shape, or a delta array shape.

In this invention, the droplet of a coloring composition is given to the recessed part on the board | substrate partitioned by the partition by the inkjet system. The inkjet method is mentioned later.

-Board-

Examples of the substrate include soda glass, borosilicate glass (for example, Pyrex (registered glass)), quartz glass, alkali-free glass, and a transparent conductive film attached thereto, for use in a liquid crystal display device, or the like. Examples thereof include a photoelectric conversion element substrate, for example, a silicon substrate, a complementary metal oxide semiconductor (CMOS), a synthetic resin film, and the like. Moreover, you may form a primer layer on these board | substrates for the improvement of close_contact | adherence with an upper layer, the prevention of a material spread, or the planarization of a board | substrate surface as needed.

-septum-

In this invention, the droplet of a coloring composition can be given to the recessed part on the board | substrate partitioned by the partition formed on the board | substrate by the inkjet method, and a colored layer can be formed. This partition may be any, but when producing a color filter, it is preferable that it is a partition which has the light-shielding property which has the function of a black matrix (BM). The partition wall can be produced by the same material and method as the known black matrix for color filters. For example, paragraphs [0021] to [0074] of JP 2005-3861, paragraphs [0012] to [0021] of JP 2004-240039, and the Japanese patent publication Paragraph Nos. [0015] to [0020] of 2006-17980 and Paragraph Nos. [0009] to [0044] of Japanese Patent Application Laid-Open No. 2006-10875, etc. may be mentioned.

Also in the said well-known manufacturing method, the method of using the photosensitive resin transfer material from a viewpoint of cost reduction is preferable. The photosensitive resin transfer material is obtained by forming a resin layer having at least light shielding properties on a base member. A photosensitive resin transfer material can be crimped | bonded to a board | substrate, and the resin layer which has the said light shielding property can be transferred to the said board | substrate.

The photosensitive resin transfer material is preferably formed using the photosensitive resin transfer material described in JP-A-5-72724, that is, an integral film. As an example of the structure of the said integrated film, the structure which laminated | stacked the support body / thermoplastic resin layer / intermediate | middle layer / photosensitive resin layer / protective film in this order is mentioned. (In the present invention, the "photosensitive resin layer" refers to a resin that can be cured by light irradiation, and when it has light blocking properties, it is also referred to as a "resin layer having light blocking properties", and when colored in a desired color, "coloring" Resin layer ")

As a preferable example of the branch body which comprises the photosensitive resin transfer material, a thermoplastic resin layer, an intermediate | middle layer, a protective film, or the manufacturing method of a transfer material, what was described in Paragraph No. 0023-0000 of Unexamined-Japanese-Patent No. 2005-3861. Can be mentioned.

In addition, the partition wall may be treated with a color development composition in order to prevent color mixing of the coloring composition. As an example of the method of processing said coloring composition, (1) the method of kneading a coloring composition material in a partition (for example, refer Unexamined-Japanese-Patent No. 2005-36160), (2) forming a coloring composition layer newly (See, for example, Japanese Patent Application Laid-open No. Hei 5-241011), (3) A method of imparting color development composition by plasma treatment (see, for example, Japanese Patent Laid-Open No. 2002-62420), (4 ) A method of applying a color development composition material to the upper surface of the partition wall (see, for example, Japanese Patent Application Laid-Open No. 10-123500), and the like. The method of performing a coloring composition treatment is preferable.

-Wetting variable layer-

In the present invention, as another method of the step of selectively changing the wettability in a predetermined region of the substrate surface and forming a colored composition layer forming region having a high affinity for color composition compared to the surroundings, a photocatalyst on a transparent substrate of a color filter By forming the wettability variable layer which changes the wettability in the direction of increasing the affinity of the composition, the wettability in a predetermined area of the surface of the wettability variable layer is selectively changed by exposure, and the affinity color composition is compared with the surroundings. You may use the method of forming the coloring composition layer forming area | region with large physical property. Specifically, Paragraph Nos. [0113] to [0121] and the like of JP 2006-284752A are described in detail.

Inkjet method

When providing a coloring composition to the recessed part on the board | substrate partitioned by the partition, the said provision can be performed by ejecting the droplet of a coloring composition by the inkjet system. As the inkjet method, a method of continuously spraying a charged coloring composition and controlling it by electric field, a method of intermittently spraying a coloring composition using a piezoelectric element, a method of heating a coloring composition and intermittently spraying using the foam, and the like Various methods of can be adopted.

It is preferable that the color filter of this invention is a form comprised from the group which consists of the at least 3 color layer obtained by giving the coloring composition of at least 3 color, such as RGB, by the inkjet system.

It is preferable that the time from the completion | finish of the droplet provision to the board | substrate in a coloring composition provision process to the start of the heat processing in the heating process mentioned later is 30 second or more. When the time is 30 seconds or more, the flatness of the formed pixel becomes sufficient, and color irregularity tends to be less likely to occur when the display device is configured.

Heating step

In the method of manufacturing a color filter, it is preferable to include the heating process of heat-processing the droplet of the given coloring composition at least after completion | finish of the said coloring composition provision process.

Specifically, after removing the solvent contained in a droplet and making it the remainder of a coloring composition, by heating the said remainder of the said colored composition, a remainder of the colored composition can be hardened and a colored layer can be formed. This heating step can be carried out in one step or in multiple steps.

The heating in the first step is heating at a predetermined temperature for completely curing the coloring composition after the removal of the solvent. Multistage heating refers to heating at a predetermined temperature that initially starts heating at a relatively low temperature, subsequently raises the heating temperature and finally completely cures the coloring composition. As a heating method, although heating by a hotplate, an electric furnace, a dryer, etc., or irradiation by irradiating infrared rays is mentioned, it is not limited to these.

You may perform the process of hardening a coloring composition remainder with an active energy ray before this heating process.

The heating temperature and the heating time in the heating step depend on the composition of the coloring composition and the thickness of the colored layer, but generally from about 120 ° C to about 250 ° C to about 10 from the viewpoint of ensuring sufficient pixel strength, solvent resistance, alkali resistance, and the like. It is preferable to heat for minutes to about 120 minutes.

In the manufacturing method of the color filter of this invention, it is preferable to perform from the said coloring composition provision process to a heating process within 24 hours, It is more preferable to carry out within 12 hours, It is further more preferable to carry out within 6 hours. After the colored layer is formed, by not leaving for a long time until the final curing step (heating step), aggregation of pigments in the coloring composition, precipitation of various binders, and the like are suppressed, and the planar shape of the pixel is improved.

After the colored region (colored pixel) and the partition are formed as described above to produce the color filter, the overcoat layer can be formed by covering the entire surface of the colored region and the partition for the purpose of improving the resistance.

The overcoat layer can flatten the surface while protecting colored regions and partitions such as R, G, and B. However, considering that the number of steps increases, it is also preferable not to form an overcoat layer.

The overcoat layer can be comprised using resin (made by Overcoat: OC). As resin (OC agent), an acrylic resin composition, an epoxy resin composition, a polyimide resin composition, etc. are mentioned. Especially, the thing which is excellent in transparency in a visible light region, the resin component of the photocurable composition for color filters mainly contains acrylic resin, the thing excellent in adhesiveness, and the acrylic resin composition are preferable. As an example of an overcoat layer, Paragraph No. 0018 of Unexamined-Japanese-Patent No. 2003-287618, and Optomer SS6699G by JSR Corporation are mentioned as a commercial item of an overcoat.

The color filter of the present invention can be produced by the above-described method for producing a color filter, and is used for applications such as portable terminals such as televisions, personal computers, liquid crystal projectors, game machines, mobile phones, digital cameras, and car navigation systems. It can apply preferably without particular limitation. In the color filter of the present invention, at least one of color pixels such as red (R), green (G), blue (B), white (W), and purple (V) is produced by the method for producing a color filter of the present invention. It should just be formed.

<Display device>

The display device of this invention forms the color filter of this invention mentioned above, and is comprised. The display device of the present invention is not particularly limited except for providing the color filter of the present invention, and may be a display device such as a liquid crystal display device, a plasma display display device, an EL display device, a CRT display device, or the like. For the definition of the display device and the explanation of each display device, for example, "electronic display device" by Akio Sasaki, issued by High School Chosaka Co., Ltd., 1990, and "display device (by Ijoki Junjo, Sankyo Shosho Co., Ltd.) 1989. Issuance).

As a form of the display device of this invention, a liquid crystal display device is especially preferable. About a liquid crystal display device, it describes in the "next-generation liquid crystal display technology (Tatsuo Uchida editorial, 1994, high school chosakai Co., Ltd.)." There is no restriction | limiting in particular in the liquid crystal display device which can apply this invention, For example, it can apply to the liquid crystal display device of various systems described in said "next-generation liquid crystal display technology." The present invention is particularly effective for the liquid crystal display device of the color TFT system among these. About the liquid crystal display device of a color | collar TFT system, it describes in the "color TFT liquid crystal display (Kyoritsu Shootpan Co., Ltd. 1996 issuance), for example." In addition, the present invention can be applied to a liquid crystal display device having an enlarged viewing angle, such as a transverse electric field driving method such as IPS and a pixel division method such as MVA. These methods are described, for example, on page 43 of EL, PDP, LCD Display Technology and the Latest Trends in the Market (Published by Toray Research Center, Research and Research, 2001).

In addition to the color filter, the liquid crystal display is composed of various members such as an electrode substrate, a polarizing film, a retardation film, a backlight, a spacer, and a viewing angle compensation film. For these members, for example, the market for '94 liquid crystal display peripheral materials and chemicals (Kenta Shima Kentaro CMC Plate 1994), and the current status and future prospects of the 2003 liquid crystal display market (the lower volume) Kichijo Fuji Chimera Soken 2003).

In the display device of the present invention, ECB (Electrically Controlled Birefringence), TN (Twisted Nematic), IPS (In-Plane Switching), FLC (Ferroelectric Liquid Crystal), OCB (Optically Compensatory Bend), STN (Supper Twisted Nematic), VA ( Various display modes, such as Vertically Aligned), HAN (Hybrid Aligned Nematic), and GH (Guest Host), can be adopted.

The display device of the present invention can be provided with a color filter as described above, so that there is no display unevenness when mounted on a television or a monitor, and can have a wide color reproduction range and a high contrast ratio. For example, it can use suitably also for display apparatus of big screens, such as a display for note PCs, and a television monitor.

(Example)

Hereinafter, an Example is given and this invention is demonstrated further more concretely. This invention is not limited to the specific example shown below. In addition, in the following Examples, unless otherwise indicated, "%" and "part" represent "mass%" and "mass part", and molecular weight shows a weight average molecular weight.

Example 1

Preparation of deep color composition for partition formation

K pigment dispersion 1 and propylene glycol monomethyl ether acetate in the amounts shown in Table 1 were weighed, mixed at a temperature of 24 ° C. (± 2 ° C.), stirred at 150 rpm for 10 minutes, and stirred in Table 1 below. Amount of methyl ethyl ketone, cyclohexanone, binder 1, phenothiazine, DPHA liquid, 2,4-bis (trichloromethyl) -6- [4'-N, N-bis (ethoxycarbonylmethyl) amino -3'-bromophenyl] -s-triazine and Surfactant 1 were weighed, added in this order at a temperature of 25 ° C (± 2 ° C) and stirred for 30 minutes at 150 rpm at a temperature of 40 ° C (± 2 ° C) The color composition K1 was obtained by doing this. Hereinafter, the detail of the component of Table 1 is shown.

＊ K Pigment Dispersion 1

Carbon black (Nipex35 from Degussa). 13.1%

Pigment dispersant (compound 1 below). 0.65%

Polymer (random copolymer of benzyl methacrylate / methacrylic acid [= 72/28 (molar ratio)], molecular weight 3.7 million)… 6.72%

Propylene glycol monomethyl ether acetate... 79.53%

＊ Binder 1

Polymer (random copolymer of benzyl methacrylate / methacrylic acid [= 78/22 (molar ratio)], molecular weight 3.8 million). 27%

Propylene glycol monomethyl ether acetate... 73%

＊ DPHA liquid

· Dipentaerythritol hexaacrylate (polymerization inhibitor MEHQ 500 ppm contained, manufactured by Nihon Kayaku Co., Ltd., trade name: KAYARAD DPHA). 76%

Propylene glycol monomethyl ether acetate... 24%

＊ Surfactant 1

Structure 1... 30%

Methyl ethyl ketone... 70%

Table 1

Formation of bulkhead

(Production of Photosensitive Transfer Material)

On the 75-micrometer-thick polyethylene terephthalate film support body (PET support body), the coating liquid for thermoplastic resin layers which consists of following formula C was apply | coated and dried using the slit-shaped nozzle, and the thermoplastic resin layer was formed. Subsequently, the coating liquid for oxygen barrier layers which consists of following prescription P1 was apply | coated and dried on this thermoplastic resin layer, and the oxygen barrier layer was formed. Furthermore, the deep color composition K1 of Table 1 was apply | coated again on an oxygen barrier layer, and it dried and formed the photosensitive resin layer.

In this way, a thermoplastic resin layer having a dry film thickness of 6.0 μm, an oxygen barrier layer having a dry film thickness of 1.6 μm, and a photosensitive resin layer K1 having a dry film thickness of 2.5 μm were formed on the PET support member. (12 micrometers thickness polypropylene film) was crimped | bonded. In this way, the photosensitive transfer material K1 which integrated the support body, the thermoplastic resin layer, the oxygen barrier layer, and the black (K) photosensitive resin layer K1 was produced.

<Coating liquid for thermoplastic resin layer: prescription C>

Methanol. Part 11.1

Propylene glycol monomethyl ether... Part 6.36

Methyl ethyl ketone. Part 52.4

Methyl methacrylate / 2-ethylhexyl acrylate / benzyl methacrylate / methacrylic acid copolymer (copolymerization composition ratio (molar ratio) = 55 / 11.7 / 4.5 / 28.8, molecular weight = 100,000, Tg ≒ 70 ° C.) Part 5.83

Styrene / acrylic acid copolymer (copolymerization composition ratio (molar ratio) = 63/37, molecular weight = 10,000, Tg ≒ 100 ° C.). Part 13.6

Dehydrating and condensing 2 equivalents of pentaethylene glycol monomethacrylate with bisphenol A (BPE-500, manufactured by Shin-Nakamura Kagaku Co., Ltd.). Part 9.1

The surfactant 1... 0.54part

<Coating liquid for oxygen barrier layer: prescription P1>

PVA205 (polyvinyl alcohol, Kuraray Co., Ltd., saponification degree = 88%, polymerization degree 550). Part 32.2

Polyvinylpyrrolidone (K-30, manufactured by BASF). Part 14.9

·Distilled water … 524 copies

Methanol… Part 429

(Formation of bulkhead)

The glass cleaner liquid adjusted to 25 degreeC was sprayed on the alkali free glass substrate for 20 second by the shower, and it wash | cleaned with the rotary brush which has nylon hair, and after pure shower washing, a silane coupling liquid (N- (beta (aminoethyl) (gamma) -aminopropyl) Trimethoxysilane 0.3% aqueous solution, brand name: KBM603, the Shin-Etsu Chemical Co., Ltd. product was sprayed for 20 second by shower, and the pure water shower wash | cleaned. This glass substrate was heated at 100 degreeC for 2 minutes with the board | substrate preheater.

Subsequently, after peeling the protective film of the photosensitive transfer material K1 obtained from the above, using a laminator (Lamic type II, manufactured by Hitachi Plant Technologies, Ltd.), a rubber roller temperature 130 was applied to the glass substrate heated at 100 ° C. for 2 minutes. It laminated at the temperature of C, the line pressure of 100 N / cm, and the conveyance speed of 2.2 m / min.

After peeling off the supporting member, the glass substrate and the mask (a quartz exposure mask having an image pattern) were placed vertically with a proximity exposure machine (manufactured by Hitachi High-Technologies Corporation) having an ultra-high pressure mercury lamp, between the mask surface and the photosensitive resin layer K1. The distance was set to 200 micrometers and the pattern exposure was carried out by exposure amount 90mJ / cm <2>.

Subsequently, pure water was sprayed with a shower nozzle to uniformly wet the surface of the photosensitive resin layer K1, and then KOH-based developer (KOH, containing a nonionic surfactant, trade name: CDK-1 (manufactured by FUJIFILM Electronic Materials Co., Ltd.)). Was diluted 100-fold with pure water) and shower-developed at 23 ° C. for 80 seconds at a flat nozzle pressure of 0.04 MPa to obtain a patterned image. Subsequently, ultrapure water was sprayed at a pressure of 9.8 MPa with an ultrahigh pressure cleaning nozzle to remove residue, thereby obtaining a matrix black (K) image. Thereafter, post exposure is performed with light of 1000 mJ / cm 2 with an ultrahigh pressure mercury lamp from the side where the K image is formed on the glass substrate, and post exposure with light of 1000 mJ / cm 2 with an ultra high pressure mercury lamp from the side opposite to the resin layer with respect to the glass substrate. Then, it heat-processed 220 degreeC and 30 minutes after that, and formed the black matrix (bum wall).

Ink repellent plasma treatment

The ink repellent plasma process was performed on the glass substrate in which the black matrix (bulb) was formed using the cathode coupling type parallel plate type plasma processing apparatus on the following conditions. In this way, the board | substrate with which the black matrix for producing a color filter was formed (it abbreviates as "BM formation board | substrate" hereafter) was obtained.

-Condition-

Use gas: CF ₄

Gas flow rate: 80sccm

Pressure: 40 Pa

RF power: 50W

Processing time: 30 seconds

Preparation of Pigment Dispersion

Brominated phthalocyanine green (C.I. Pigment Green 36, trade name: Rionol Green 6YK, manufactured by TOYO INK MFG.CO., LTD.), SOLSPERSE 24000GR (manufactured by The Lubrizol Corporation, pigment dispersant), C.I. Pigment Yellow 150 (trade name: Bayplast Yellow 5GN 01, manufactured by Bayer Corporation), and dipropylene glycol dimethyl ether (solvent; hereinafter abbreviated as 2PDM) are blended as shown in Table 2 below, and premixed (pre After mixing), a pigment dispersion for G (G1) was prepared by dispersing the zirconia beads having a diameter of 0.65 mm at a filling rate of 80% with a motor mill (Model M-50, manufactured by Eiger Japan) at a speed of 9 m / s for 9 hours. did.

In the above-mentioned pigment dispersion (G1) for G, pigments for G (G2) to (G10), in the same manner as the pigment dispersion (G1) for G, except that the pigment and other components are changed as shown in Table 2 below. Pigment dispersion liquid (R1)-(R4) for R and pigment dispersion liquid (B1)-(B2) for B were prepared.

Table 2

Subsequently, as shown in the following Table 3, after mixing a solvent, a monomer, and a thermal polymerization inhibitor, and stirring at 25 degreeC for 30 minutes, it confirmed that there was no insoluble matter, and prepared the monomer solution.

Next, the said monomer liquid was added slowly, stirring for 30 minutes at 25 degreeC, stirring G pigment dispersion liquid (G1), and G inkjet ink G1 was prepared.

In addition, the detail of the used component (component of Table 2, the following Table 3) is as follows.

PR254: C.I. Pigment Red 254 (brand name: Irgaphor Red B-CF, product made in Ciba Japan K.K.)

RP177: C.I. Pigment Red 177 (brand name: Cromophta Red A2B, product made in Ciba Japan K.K.)

PG36: C.I. Pigment Green 36 (brand name: Rionol Green 6YK, TOYO INK MFG.CO., LTD. Product)

PY150: C.I. Pigment Yellow 150 (brand name: Bayplast Yellow 5GN 01, Bayer AG product)

PB15: 6: C.I. Pigment Blue 15: 6 (brand name: Lionol Blue ES, TOYO INK MFG.CO., LTD. Product)

PV23: C.I. Pigment Violet 23 (brand name: Hostaperm Violet RL-NF, made by Clariant (Japan) K.K.)

SOLSPERSE 24000GR (made by The Lubrizol Corporation)

SOLSPERSE 22000 (manufactured by The Lubrizol Corporation)

SOLSPERSE 5000 (made by The Lubrizol Corporation)

2PDM (dipropylene glycol dimethyl ether; boiling point 171 ° C)

3 PDM (tripropylene glycol dimethyl ether; boiling point 215 ° C.)

4 PDM (tetrapropylene glycol dimethyl ether; boiling point 279 ° C.)

3PDE (tripropylene glycol diethyl ether; boiling point 241 ° C.)

3 PMB (tripropylene glycol methyl butyl ether; boiling point 258 ° C.)

2EDM (diethylene glycol dimethyl ether; boiling point 162 ° C.)

3EDM (triethylene glycol dimethyl ether; boiling point 216 ° C)

4EDM (tetraethylene glycol dimethyl ether; boiling point 275 ° C.)

3EDE (triethylene glycol diethyl ether; boiling point 238 ° C.)

3EMB (triethylene glycol methyl butyl ether; boiling point 261 ° C.)

DPHA: dipentaerythritol hexaacrylate (polymerization inhibitor MEHQ 500 ppm contained, manufactured by Nihon Kayaku Co., Ltd., trade name: KAYARAD DPHA). 76%

Propylene Glycol Monomethyl Ether Acetate ... 24%

Formation of colored pixel by inkjet method

The injection | throwing-in of the inkjet ink G1 produced above was performed in the following forms.

As the inkjet head, ink was directed to a substrate on which a BM was formed using an inkjet ink-targeting device having a head portion provided with SX-3 manufactured by Dimatix, and having a dedicated piezoelectric drive circuit and a stage control-only circuit as a discharge control device. . The SX-3 is an on-demand piezo-driven head with 128 nozzles spaced at 508 µm per head. In driving the piezo, the center value of the voltage was set to 50 V and the pulse width was 8 microseconds, and the voltage at each nozzle was adjusted so that the difference in the discharge amount from each nozzle was within 2% by the above-mentioned emergency shape observation and discharge amount measurement. . The center value of the discharge amount was 8 ng / drop.

The BM-forming substrate was mounted on a substrate stage fixed on a dedicated automatic two-dimensional moving stage. The interval between the head and the BM-forming substrate was adjusted to 500 µm, and the time from when the piezo of the head was driven to the formation of ink droplets and landing on the BM-forming substrate was about 63 µsec. The size of the pixel on the BM-forming substrate is 125 µm in the X direction and 150 µm in the Y direction, and a black matrix (border wall) having a line width of 25 µm having an opening having a curvature of 4 corners of 25 µm is formed and surrounded by a black matrix. Ink was punched into the opened opening. The piezo was set at a driving frequency of 10 KHz in the case of continuous strike, and the substrate was moved at a constant speed of 8.2 cm / sec to strike within a section of 270 μm in the X direction of the pixel.

Subsequently, after heat-drying at 90 degreeC for 2 minutes with a hotplate, all the partitions and colored pixels were fully hardened by heat-processing in oven at 220 degreeC for 30 minutes, and the color filter was produced.

(Evaluation 1)

The following evaluation was performed about the color filter obtained in Example 1. The evaluation results are shown in Table 4 below.

Evaluation of Wetting Spread

The colored pixel of the obtained color filter was observed under a microscope, and the wetting of the ink of the opening part was evaluated according to the following evaluation criteria. In addition, as described above, ink is applied to the opening of the glass substrate in which a black matrix (border wall) having a line width of 25 μm having an opening having a curvature of 25 μm phi of four corners of 125 μm × 150 μm is formed. .

-Evaluation standard-

A: A strike amount of 0.6 times the strike amount at which the average height of the pixel is equal to the height of the black matrix, and there was no problem in wetness.

B: A strike amount of 0.8 times the strike amount at which the average height of the pixel is equal to the height of the black matrix, and there was no problem in the wetness.

C: The average height of the pixels is a strike amount equal to the height of the black matrix, and there was no problem with the wetness.

X: Even if the average height of the pixels was the same as the height of the black matrix, wetting defects occurred and whitening was observed.

-2.Evaluation of discharge

After the ink was discharged and left for 10 minutes at room temperature, the ink was discharged again. Among the 128 nozzles, the number of nozzles in which ink was not discharged due to clogging was counted and evaluated according to the following evaluation criteria.

-Evaluation standard-

A: The number of nozzles in which fire discharge occurred was one or less.

B: The number of nozzles which fire discharge produced was 2-4.

X: The number of nozzles which fire discharge produced was 5 or more.

Table 3

(Examples 2 to 5 and Examples 7 to 8, Comparative Examples 1 to 5 and Comparative Examples 7 to 8)

In the preparation of the inkjet ink in Example 1, except that the composition of the ink is changed to the composition shown in Table 3 above, inkjet inks G2 to G10, R1, R2, B1, and B2 are prepared in the same manner as in Example 1. did. In formation of the colored pixel by the inkjet method of Example 1, the color filter was performed like Example 1 except having used any of the said inkjet ink G2-G10, R1, R2, B1, B2 instead of inkjet ink G1. Made.

In addition, evaluation similar to Example 1 is performed and the evaluation result is shown in following Table 4.

Table 4

(Example 6, Comparative Example 6)

In preparing the inkjet ink in Example 1, except for changing the composition of the ink to the composition shown in Table 5 below, inkjet inks G11 to G12 were prepared in the same manner as in Example 1. In formation of the colored pixel by the inkjet method of Example 1, the color filter was produced like Example 1 except having used the said inkjet ink G11 or G12 instead of inkjet ink G1.

In addition, evaluation similar to Example 1 is performed and the evaluation result is shown in following Table 5.

Table 5

In addition, the detail of the component of the said Table 5 is as follows.

EPICOAT157S70 (made in Japan Epoxy Resins Co., Ltd.)

Binder type epoxy resin

(Random copolymer of glycidyl methacrylate / cyclohexyl methacrylate [= 6/4 (molar ratio)], weight average molecular weight 9600)

Carboxyl group blocked trimellitic acid

[Blocking the carboxyl group of trimellitic acid with n-propyl vinyl ether (solid content 69.9%, solvent: cyclohexanone)]

Synthesis of Binder Epoxy Resin

44.0 parts of solvent BCA (diethylene glycol monobutyl ether acetate) which does not contain a hydroxyl group were thrown in the four neck flask equipped with the thermometer, the reflux condenser, the stirrer, and the dropping lot, it heated while stirring, and it heated up at 115 degreeC. Subsequently, 28.4 parts of glycidyl methacrylate, 21.6 parts of cyclohexyl methacrylate, 5.0 parts of t-hexyl peroxy isopropyl monocarbonate, and the solvent BCA which do not contain a hydroxyl group at the temperature of 115 degreeC were carried out. A mixture (dropping component) of 1.0 part of diethylene glycol monobutyl ether acetate) and 56.0 parts in total were dropped at constant speed from a dropping lot over 2 hours. After completion of the dropwise addition, the mixture was held at 115 ° C. for 2.5 hours, then heated to 125 ° C. and held for 2 hours to terminate the reaction, thereby obtaining a binder epoxy resin.

Synthesis of carboxyl group-blocked trimellitic acid

Into a four-necked flask equipped with a thermometer, a reflux condenser, a stirrer, and a dropping lot, 14.5 parts of cyclohexanone, 31.4 parts of 1,2,4-trimeric acid, and 54.1 parts of n-propylvinyl ether were added, followed by heating with stirring to 70 It heated up at ° C. Subsequently, the reaction was terminated after the acid value of the mixture became 3 or less while continuing stirring while maintaining the temperature of 70 degreeC, and the carboxyl group-blocked trimellitic acid was obtained.

Example 9

Formation of colored pixel by inkjet method

Using the inkjet inks R1, G2, and B1 produced in the above examples, inks were performed in the following forms.

A three-color inkjet head having a head portion provided with three SX-3s manufactured by Dimatix, and an inkjet ink-targeting device having a dedicated piezo drive circuit and a stage control circuit as a discharge control device, were used to form a BM-forming substrate. Inking was performed with respect to the ink. SX-3 is an on demand piezoelectric driving head, and 128 nozzles are arranged at one head at intervals of 508 µm. In driving the piezo, the center value of the voltage was set to 50 V and the pulse width was 8 microseconds, and the voltage at each nozzle was adjusted so that the difference in the discharge amount from each nozzle was within 2% by the above-mentioned emergency shape observation and discharge amount measurement. . The center value of the discharge amount was 8 ng / drop.

The BM forming substrate was mounted on a substrate stand fixed on a dedicated automatic two-dimensional moving stage. The interval between the head and the BM-forming substrate was adjusted to 500 µm, and the time from when the piezo of the head was driven to the formation of ink droplets and landing on the BM-forming substrate was about 63 µsec. The size of the pixel on the BM formation substrate was 300 micrometers in the X direction, and 100 micrometers in the Y direction, and it adjusted so that the apparent nozzle spacing of the Y direction might be 300 micrometers by tilting a head 53.8 degree with respect to the X direction.

The piezo had a driving frequency of 10 KHz in the case of continuous strike, and moved 33 substrates 264 ng in the X direction of the pixel 270 占 퐉 by moving the substrate at a constant speed of 8.2 cm / sec.

The BM-forming substrate was moved and the inkjet ink of each color was applied to the plurality of recesses under the above conditions. Subsequently, after heat-drying at 90 degreeC for 2 minutes with a hotplate, both a partition and a colored pixel were fully hardened by heat-processing in an oven of 220 degreeC for 30 minutes, and the color filter was produced (hereinafter, "color filter substrate. Is called.

Production of display device

A transparent electrode of ITO (Indium Tin Oxide) was further formed by sputtering on the R pixel, the G pixel, the B pixel, and the black matrix (bulk wall) of the obtained color filter substrate. Separately, the glass substrate was prepared as an opposing board | substrate, and patterning for PVA mode was performed on the transparent electrode and the opposing board | substrate of a color filter substrate, respectively.

A photospacer was formed in a portion corresponding to the upper portion of the black matrix on the transparent electrode of ITO, and an alignment film made of polyimide was further formed thereon.

Thereafter, a sealant of an ultraviolet curable resin is applied by a dispenser method to a position corresponding to the black matrix outer frame formed around the pixel group of the color filter by a dispenser method, and the liquid crystal for PVA mode is dropped, and the counter substrate and After the bonding, the bonded substrate was subjected to UV irradiation, followed by heat treatment to cure the sealing agent. Thus, the polarizing plate HLC2-2518 made from SANRITZ was stuck on both surfaces of the obtained liquid crystal cell. Subsequently, the backlight of the cold cathode tube was comprised, it arrange | positioned at the side used as the back surface of the liquid crystal cell in which the said polarizing plate was provided, and it was set as the liquid crystal display device.

(Comparative Example 9)

In the formation of the colored pixel by the inkjet method in Example 9, a color filter was produced in the same manner as in Example 9 except that the inkjet inks R2, G7, and B2 were used instead of the inkjet inks R1, G2, and B1. And the liquid crystal display device was produced.

(Evaluation 2)

About the color filter and display apparatus obtained in Example 9 and the comparative example 9, the bright spot generation was evaluated by carrying out the monochrome display test of R, G, and B.

As a result, it was confirmed that the display device of Example 9 had no defects in bright spots and had good display performance. On the other hand, in the display device of Comparative Example 9, bright spots due to a large number of whitening defects were observed in the plane.

As apparent from Tables 4 to 5, wettability to the glass substrate was good in Examples, and generation of whitening defects could be suppressed. Moreover, the liquid crystal display device provided with the color filter obtained in the Example had few defects which become a bright point, and showed favorable display performance.

Claims (10)

As a coloring composition for color filters containing a coloring material and a solvent: The said solvent, Dipropylene glycol dialkyl ether solvents represented by the following structural formula (1); Tripropylene glycol dialkyl ether solvents represented by the following structural formula (2); And The coloring composition for color filters containing 1 or more types chosen from the group which consists of a tetrapropylene glycol dialkyl ether type solvent represented by following structural formula (3). R ¹ O— (CH (CH ₃ ) CH ₂ O) ₂ —R ² . (One) R ¹ O— (CH (CH ₃ ) CH ₂ O) ₃ —R ² . (2) R ¹ O— (CH (CH ₃ ) CH ₂ O) ₄ —R ² . (3) [Wherein, R ¹ and R ² each independently represent an alkyl group having 1 to 10 carbon atoms.] The color filter coloring according to claim 1, wherein the boiling point of the solvent represented by any one of the structural formulas (1) to (3) is 200 ° C to 300 ° C under 1.01 × 10 ⁵ Pa conditions. Composition. The coloring composition for color filters according to claim 1, wherein the color material is a pigment. The coloring composition for color filters of Claim 3 which further contains a pigment dispersant. The coloring composition for a color filter according to claim 1, further comprising a polymerizable monomer, wherein the polymerizable monomer is at least one selected from an acrylic monomer, an epoxy monomer, and an oxetanyl monomer. The coloring composition for color filters of Claim 1 which further contains a binder resin. The coloring composition for color filters of Claim 1 whose viscosity in 20 degreeC is 10-20 mPa * s. The coloring composition for color filters according to claim 1, which is used for producing an inkjet color filter by discharging by an inkjet method to form a colored region. It produced using the coloring composition for color filters in any one of Claims 1-8, The color filter characterized by the above-mentioned. A display device comprising the color filter according to claim 9.