Pressure sensitive adhesive release liner

Details Pressure sensitive adhesive release liner Pressure sensitive adhesive release liner

1987-12-21

1989-06-27

Pianalto, Bernard

Coating processes

With post-treatment of coating or coating material

Heating or drying

4272084, 428 40, 428447, B05D 302

Patent

active

048429023

ABSTRACT:
Pressure sensitive adhesives can be protected with a releasable liner having a cured fluoroalkyl silicone coating which contains as little as two percent fluoroalkyl-substituted 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.

REFERENCES:
patent: 3050411 (1962-08-01), Keil
patent: 4039707 (1977-08-01), O'Malley
patent: 4472480 (1984-08-01), Olson
patent: 4565714 (1986-01-01), Koshar

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