KR-20260064567-A - PIGMENT DISPERSION COMPOSITION FOR BLACK MATRIX、AND PIGMENT DISPERSION RESIST COMPOSITION FOR BLACK MATRIX

KR20260064567AKR 20260064567 AKR20260064567 AKR 20260064567AKR-20260064567-A

Abstract

A pigment dispersion composition for a black matrix comprising carbon black, silica particles, a pigment dispersant containing a basic group, a pigment dispersion aid containing an acid group, an alkali-soluble resin, and a solvent, wherein the silica particles are silica particles containing a phenyl group and/or silica particles containing a (meth)acrylic group, and the silica particles are in an amount of 2 parts by mass or more and 20 parts by mass or less per 100 parts by mass of carbon black. The pigment dispersion composition for a black matrix can form a black matrix having high light-blocking properties while having low reflectivity from a glass surface.

Inventors

토다 미츠노부
무라카미 나츠키
하이토 아키라
츠지 야스히토
히라이 준이치

Assignees

사카타 인쿠스 가부시키가이샤

Dates

Publication Date: 20260507
Application Date: 20251024
Priority Date: 20241030

Claims (4)

A pigment dispersion composition for a black matrix comprising carbon black, silica particles, a basic group-containing pigment dispersant, an acid group-containing pigment dispersion aid, an alkali-soluble resin, and a solvent, The above silica particles are phenyl group-containing silica particles and/or (meth)acrylic group-containing silica particles, and A pigment dispersion composition for a black matrix characterized in that the silica particles are present in an amount of 2 parts by mass or more and 20 parts by mass or less per 100 parts by mass of carbon black.
A pigment dispersion composition for a black matrix according to claim 1, characterized in that the silica particles are 10 parts by mass or less per 100 parts by mass of carbon black.
A pigment dispersion resist composition for a black matrix characterized by comprising a pigment dispersion composition for a black matrix as described in claim 1 or claim 2, a photopolymerizable compound, and a photopolymerization initiator.
A pigment dispersion resist composition for a black matrix according to claim 3, characterized in that the proportion of silica particles in the solid content of the pigment dispersion resist composition for a black matrix is 0.4 mass% or more and 9.5 mass% or less.

Description

Pigment dispersion composition for black matrix, and pigment dispersion resist composition for black matrix The present invention relates to a pigment dispersion composition for a black matrix and a pigment dispersion resist composition for a black matrix. A pigment dispersion composition for a black matrix comprising carbon black, a pigment dispersant containing a basic group, an alkali-soluble resin, and a solvent, and a pigment dispersion resist composition for a black matrix comprising the pigment dispersion composition for the black matrix, a photopolymerizable compound, and a photopolymerization initiator are known (Patent Documents 1-2). In addition, it is known that a pigment dispersion resist composition for a black matrix, including carbon black, alkali-soluble resin, photopolymerizable compound, etc., contains a specific amount of hydrophobic silica microparticles (Patent Document 3). The pigment dispersion composition for a black matrix of the present invention comprises carbon black, silica particles, a pigment dispersant containing a basic group, a pigment dispersion aid containing an acidic group, an alkali-soluble resin, and a solvent. Carbon Black The carbon black mentioned above may be a known carbon black used in pigment dispersion compositions for black matrices, such as neutral carbon black or acidic carbon black. Additionally, it is preferable that the carbon black has an average primary particle size of about 20 to 60 nm. The carbon black may be used alone or in combination of two or more types. It is preferable that the above neutral carbon black has a pH in the range of 8 to 10. Examples of commercially available neutral carbon blacks include Printex 25 (average primary particle size 56 nm, pH 9.5), Printex 35 (average primary particle size 31 nm, pH 9.5), and Printex 65 (average primary particle size 21 nm, pH 9.5) manufactured by Orion Engineered Carbons, and MA#20 (average primary particle size 50 nm, pH 7.5), MA#30 (average primary particle size 30 nm, pH 8.0), and MA#40 (average primary particle size 40 nm, pH 8.0) manufactured by Mitsubishi Chemical. It is preferable that the above acidic carbon black has a pH in the range of 2 to 4. Commercially available acidic carbon blacks mentioned above include Columbia Chemicals’ Raven 1080 (average primary particle size 28 nm, pH 2.4) and Raven 1100 (average primary particle size 32 nm, pH 2.9); Mitsubishi Chemical’s MA-8 (average primary particle size 24 nm, pH 3.0), MA-100 (average primary particle size 22 nm, pH 3.5), and MA#70 (average primary particle size 24 nm, pH 3.0); and Orion Engineered Carbons’ Special Black 250 (average primary particle size 56 nm, pH 3.0), Special Black 350 (average primary particle size 31 nm, pH 3.0), Special Black 550 (average primary particle size 25 nm, pH 4.0), and NEROX 2500 (average primary particle size 56 nm, pH 100). Examples include 3.0), NEROX3500 (average primary particle size 31 nm, pH 3.0). In addition, the pH is typically measured at 25°C using a glass electrode after preparing an aqueous suspension by adding 1g of carbon black to 20mL of distilled water (pH 7.0) from which carbon dioxide has been removed and mixing with a magnetic stirrer (German industrial product standard DIN ISO 787/9). In addition, the average primary particle size is typically the value of the arithmetic mean diameter obtained by electron microscopy. However, the pH and average primary particle size of the commercially available carbon black are catalog values. The carbon black is preferably 60 mass% or more and more preferably 65 mass% or more in terms of increasing light-blocking properties when a black matrix is formed among the solid components of the pigment dispersion composition for the black matrix, and is preferably 90 mass% or less and more preferably 85 mass% or less in terms of pigment dispersion. Silica particles The silica particles are phenyl group-containing silica particles and/or (meth)acrylic group-containing silica particles. The silica particles may be used alone or in combination of two or more types. The above phenyl group-containing silica particles simply need to have phenyl groups on the surface of the silica particles, and are typically obtained by surface-treating the silica particles with a silane compound. Examples of the above phenyl group-containing silica particles include particles surface-treated with phenylsilane, particles surface-treated with phenylaminosilane, etc. From the perspective of reducing reflectance from a glass surface, particles surface-treated with phenylsilane are preferred for the above phenyl group-containing silica particles. Examples of commercially available products of the above phenyl group-containing silica particles include YA010C-SP3 and YC100C-SP3 (both products of Admatex). The above (meth)acrylic group-containing silica particles simply need to have (meth)acrylic groups on the surface of the silica particles, and are typically obtained by surface trea