PRESSURE SENSITIVE ADHESIVE RELEASE LINER AND FLUOROSILICONE COMPOUNDS, COMPOSITIONS AND METHOD THEREFOR

摘要

PRESSURE SENSITIVE ADHESIVE RELEASE LINER AND FLUOROSILICONE COMPOUNDS, COMPOSITIONS AND METHOD THEREFOR Pressure sensitive adhesives can be protected with a releasable liner having a cured fluoroalkyl silicone coating which contains as little as two percent fluoroalkylsubstituted siloxane units. In a preferred embodiment of this invention, silicone pressure sensitive adhesives can be solvent-cast, and even cured, directly onto the release surface of the liner and can be removed from the protective liner with a force of no more than 400 grams per inch. The fluoroalkyl silicone copolymers of this invention are prepared by a process which involves the preparation of a cohydrolyzate of fluoroalkyl-containing and fluoroalkyl-free siloxane units, followed by further polymerization of the cohydrolyzate with other siloxane units.