Black matrix composition, black matrix, and black matrix production method
[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.
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
R 1 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) k SiR 3 m (OR 5 ) l (3)
(wherein
R 3 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
R 5 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.
2. 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.
3. 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.
4. 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.
5. A method for manufacturing a black matrix comprising applying the composition according to claim 1 and curing.
6. The method according to claim 5 further comprising etching after curing.
7. A black matrix formed by the composition according to claim 1 .