| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous pigment ink composition having excellent adhesion and alcohol resistance after printing. <P>SOLUTION: In this nonaqueous pigment ink composition essentially comprising (1) an organic solvent, (2) a high molecular compound, and (3) a pigment, (1) the organic solvent consists of at least one kind of solvent selected from a group consisting of (1a) glycol ethers and glycol ether acetates, and (1b) 1,3-dimethyl-2-imidazolidinone, a content of the former (1a) is within a range of 35-94 wt.% in the whole ink composition, and a content of the latter (1b) is within a range of 3-30 wt.% in the whole ink composition. In the nonaqueous pigment ink composition, 1-15 wt.% vinyl chloride-vinyl acetate copolymer is contained as (2) the high molecular compound, and a concentration of (3) the pigment is 2-20 wt.% in the whole ink composition. <P>COPYRIGHT: (C)2009,JPO&INPIT |
