Patent ID: 7462229
Filing Date: 2008-12-09
Classification: B43K,C09D

Abstract:
1. An oil-based ink composition for a ballpoint pen comprising at least a coloring agent, a resin, at least one solvent selected from the group consisting of propylene glycol monomethyl ether, 1,3-butanediol, 3-methoxy-1-butanol and 3-methyl-3-methoxy-1-butanol as a main solvent in an amount of 50% by weight or more based on an entire solvent, a phosphoric acid ester neutralized material in an amount of from 0.01 to 15% by weight based on an entire weight of the ink composition, and polypropylene glycol having a molecular weight of 1,000 or more in an amount of 0.01 to 10% by weight based on the entire weight of the ink composition.