Flexcon Company, Inc.

Sharon A Quinn

John R Pennace

A silicon release laminate formed by a support with a silicone release layer. A separate pressure-sensitive silicon adhesive may be on the same or opposite side of the support as the release layer. The force required to separate the adhesive from the release layer is less than about 100 grams (3.3. oz.) per inch, and preferably less than 50 grams (1.7 oz.) per inch. The release layer is formed from one or more polysiloxanes having a viscosity below 900 centipoises, and preferably below about 600 centipoises, with a high degree of cross-linking. The polysiloxanes may be produced directly by hydrolysis of substituted halosiloxanes and depolymerization; or by hydration of higher molecular weight polysiloxanes and heat treatment to produce lower weight constituents.

Silicone releases, laminates and methods

A silicone release laminate formed by a support with a silicone release layer. A separate pressure-sensitive silicone adhesive release layer may be on the same side of the support as the release layer, or on opposite sides of the support. The force required to separate the adhesive from the release layer is less than about 100 grams (3.3 oz.) per inch, and preferably less than 50 grams (1.7 oz.) per inch. The release layer is formed from one or more organopolysiloxanes having a viscosity below 1000 centipoises, and preferably below about 600 centipoises, with a high degree of cross-linking. The organopolysiloxanes may be produced directly by hydrolysis of organo-substituted halosiloxanes and depolymerization; or by hydration of higher molecular weight organopolysiloxanes and heat treatment to produce lower weight constituents.

Silicone release layers, laminates and methods

A silicone pressure-sensitive adhesive release laminate having a support coated on at least one side with a silicone release layer, and over the release layer, a pressure-sensitive silicone adhesive. The release force required to separate the adhesive from the release layer is less than about 200 grams per inch, and preferably less than 100 grams. The release layer is a silicone release polymer having a high degree of cross-linking formed from at least one prepolymer having a viscosity below about 1000 centipoises at 25.degree. C.

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Hudson, MA, United States of America

Sharon A Quinn