Patent ID: 7470730

Claim:
An ink-jet ink composition for a color filter comprising: (A′) a main polymer wherein the main polymer is an epoxy compound (A) having two or more epoxy groups in a molecule, and has two or more glycidyl groups, comprising at least a constituent unit represented by the below-mentioned formula 2 and a constituent unit represented by the below-mentioned formula 3, wherein R 6 denotes a hydrogen atom or an alkyl having 1 to 3 carbon atom, and R 7 denotes a hydrocarbon group having 1 to 12 carbons or —(R 8 X) n —R 9 ; R 8 denotes a substituted or unsubstituted divalent hydrocarbon group having 1 to 5 carbon atoms, X denotes an oxygen atom or a sulfur atom, and R 9 denotes a hydrocarbon group having 1 to 12 carbon atoms; R 8 and R 9 be bonded with each other so as to form a heterocycle having X as a hetero atom; moreover, n is an integer from 1 to 10, wherein R 10 denotes a hydrogen atom or an alkyl having 1 to 10 carbons, and wherein the weight average molecular weight of the main polymer (A′) is 10,000 or less; and (B) a carboxyl group block compound having two or more functional groups represented by the below-mentioned formula 1a or formula 1b, wherein R 1 , R 2 , R 3 , R 1′ , R 2′ and R 3′ each denote a hydrogen atom or an organic group having 1 to 18 carbon atoms, R 4 and R 5 each denote an organic group having 1 to 18 carbon atoms, Y 1 and Y 1′ each denote an oxygen atom or a sulfur atom; R 3 and R 4 may be bonded with each other so as to form a heterocycle having Y 1 as a hetero atom; moreover, R 1′ , R 2′ and R 3′ and Y 1′ may be same as or different from corresponding R 1 , R 2 , R 3 and Y 1 , respectively; and a solvent (E) which dissolves or disperses components of the ink, and contains as a main solvent having 180° C. to 260° C. boiling point and a 133 Pa or less vapour pressure at an ordinary temperature by a 80% by weight or more ratio with respect to the total amount of the solvent (E); and said composition further comprising a pigment or other coloring agent contained therein.