# US 11,028,270 B2 · Black matrix composition, black matrix, and black matrix production method

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- Number: US 11,028,270 B2
- Document ID: US11028270B2
- Status: Granted
- Kind: B2
- Application number: 16/467,246
- Filed: 2017-12-07
- Published: 2020-09-03
- Granted: 2021-06-08
- Earliest claimed: 2016-12-08
- Assignees: Merck Patent GmbH
- Applicants: Sharp Corporation; Ridgefield Acquisition
- Inventors: Hirohiko Nishiki; Tohru Okabe; Izumi Ishida; Shogo Murashige; Atsuko Noya; Toshiaki Nonaka; Naofumi Yoshida
- Web page: https://patentgrep.com/patent/US11028270B2

## CPC

- C08L 83/06: containing silicon bound to oxygen-containing groups (C08L83/12 takes precedence)
- C08K 3/04: Carbon
- C08K 3/36: Silica
- C08K 9/06: with silicon-containing compounds
- C09C 1/48: Carbon black
- G02B 5/20: Filters (polarising elements G02B5/30)
- C08G 77/04: Polysiloxanes
- C08K 2201/003: Additives being defined by their diameter
- C08K 2201/011: Nanostructured additives
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

[Problem] To provide a composition for a black matrix which is a material suitable for manufacturing a black matrix, which is suitable for a high luminance display device structure and has high heat resistance and high light-shielding properties. [Means for Solution] The present invention uses a composition for a black matrix comprising: (I) a black colorant containing carbon black having a volume average particle diameter of 1 to 300 nm; (II) a siloxane polymer to be obtained by hydrolyzing and condensing a silane compound represented by a prescribed formula in the presence of an acidic or basic catalyst; (III) surface modified silica fine particles; (IV) a thermal base generator; and (V) a solvent.

## Claims

### Claim 1

A composition for a black matrix comprising:
(I) a black colorant comprising carbon black having a volume average particle diameter of 1 to 300 nm;
(II) a siloxane polymer having repeating units represented by the general formulae (Ia), (Ib) and/or (Ic)
(wherein
R1 is a linear, branched or cyclic, alkyl group or alkenyl group having 1 to 10 carbon atoms or an aryl group having 6 to 20 carbon atoms, where one or more methylene may be replaced by oxygen, or one or more hydrogen may be replaced by fluorine,
the ratio x of the general formula (Ia) in all of the repeating units is 0 mol % or more and 30 mol % or less, the ratio y of the general formula (Ib) in all of the repeating units is 50 mol % or more and 100 mol % or less, and the ratio z of the general formula (Ic) in all of the repeating units is 0 mol % or more and 30 mol % or less);
(III) surface modified silica fine particles having, on at least a part of the surface, a functional group represented by the general formula (3):
—(O)kSiR3m(OR5)l (3)
(wherein
R3 represents a linear, branched or cyclic, alkyl group or alkenyl group having 1 to 20 carbon atoms or an aryl group having 6 to 20 carbon atoms, where one or more methylene may be replaced by oxygen, or one or more hydrogen may be replaced by fluorine
R5 represents hydrogen or an alkyl group having 1 to 10 carbon atoms,
k+1+m=4, k=1 to 3, and m=0 to 3)
and having a volume average particle diameter of 1 to 300 nm;
(IV) a thermal base generator; and
(V) a solvent.

### Claim 2 (depends on 1)

The composition according to claim 1, wherein the ratio of the volume average particle diameter of said carbon black to that of said surface modified silica fine particles is 1:0.05 to 1:3.

### Claim 3 (depends on 1)

The composition according to claim 1, wherein the mass ratio of said black colorant to said siloxane polymer is in the range of the black colorant:the siloxane polymer=10:90 to 50:50.

### Claim 4 (depends on 1)

The composition according to claim 1, wherein the mass ratio of said black colorant to said surface modified silica fine particles is in the range of the black colorant:the surface modified silica fine particles=10:90 to 90:10.

### Claim 5 (depends on 1)

A method for manufacturing a black matrix comprising applying the composition according to claim 1 and curing.

### Claim 6 (depends on 5)

The method according to claim 5 further comprising etching after curing.

### Claim 7 (depends on 1)

A black matrix formed by the composition according to claim 1.