Patent ID: 7012110
Filing Date: 2006-03-14
Classification: C08G,C08L,C09J,Y10T

Abstract:
1. A pressure sensitive adhesive comprising: a silicone tackifying resin; a polydiorganosiloxane polyurea copolymer that is the reaction product of a polydiorganosiloxane polyamine with polyisocyanate, wherein the mole ratio of isocyanate to amine is in a range of about 0.97:1 to about 1.03:1; and a plasticizer; wherein the silicone tackifying resin and polydiorganosiloxane polyurea copolymer are generally uniformly distributed; the pressure sensitive adhesive is organic solvent-based; the silicone tackifying resin is present in an amount of at least about 55 wt-%, based on the weight of the silicon tackifying resin and the polydiorganosiloxane polyurea copolymer; and the plasticizer is present in an amount sufficient to provide a generally uniform distribution of the polydiorganosiloxane polyurea copolymer and the silicone tackifying resin.