Patent ID: 7977402
Filing Date: 2011-07-12
Classification: C08F,C09D

Abstract:
1. A radiation curable ink composition for impulse printheads, comprising: a) a photoinitiator system which comprises both a photocation polymerization initiator and a free-radical photoinitiator, each in the amount of about 1 to about 12 wt. %; b) from about 0.5 to about 30 wt. % of an acrylate ester of a carboxylic acid ester represented by the formula: having a carboxylate ester moiety containing groups R c) from about 3 to about 60 wt. % of at least one radiation curable material containing a radiation curable functional group; wherein the ink composition has a viscosity of less than about 70 cPs at 25° C.