Patent ID: 7815724

Claim:
An ink jet-recording ink composition comprising (i) a polymerizable α-hetero atom-containing methacrylic compound (a) represented by the following general formula (I), (ii) a polymerization initiator (b) and (iii) a coloring material (c), wherein the ink composition contains a solvent in an amount up to 5% by mass based on the total mass of the ink composition and the surface tension of the ink composition ranges from 20 to 30 mN/m: wherein, R a and R b each independently represent a hydrogen atom, a halogen atom, a cyano group or an organic group; X represents a group bonded to the α-carbon through a hetero atom, or a halogen atom; and R c represents a secondary or tertiary monovalent hydrocarbon group selected from the group consisting of adamantyl group, noradamantyl group, decalin residue, tricyclo-decanyl group, tetracyclo-dodecanyl group, norbornyl group, cedrol group, cycloheptyl group, cyclooctyl group, cyclodecanyl group and cyclododecanyl group, which may additionally comprise a substituent selected from the group consisting of alkyl groups, halogen atoms, hydroxyl group, alkoxy groups, carboxyl groups and alkoxycarbonyl groups, provided that X and R c , R a and R b , or X and R a or R b may be linked together to form a ring structure.