Patent ID: 7267846
Filing Date: 2007-09-11
Classification: B29D,C09D,G02B,G02C

Abstract:
1. An ink comprising: a) an oligomer capable of free radical self polymerization upon exposure to an ultra violet light source or a thermal source; b) a pigment; c) a polymerizable hydrophilic monomer; and d) an initiator; wherein said ink may be cured upon exposure to said ultra violet light source or said thermal source; further wherein said ink is swellable and sterilizable when cured; further wherein the viscosity of said ink is between about 1 and about 100 centipoises; further wherein the surface tension of said is ink is between about 20 and about 70 dynes/cm; further wherein said oligomer comprises two oligomers comprising the structures: wherein R and further wherein n=2 to 10.