Low-viscosity pressure-adherent silicone elastomer compositions

Details Low-viscosity pressure-adherent silicone elastomer compositions Low-viscosity pressure-adherent silicone elastomer compositions

C - Chemistry, Metallurgy

09

J

167/159, 400/410

C09J 183/04 (2006.01) A61K 9/70 (2006.01) A61L 15/26 (2006.01) A61L 15/58 (2006.01)

Patent

CA 1338074

A pressure-adherent silicone elastomer composition comprising a homogeneous mixture of a silicone pressure sensitive adhesive composition, a crosslinkable silicone elastomer composition and, optionally, a viscosity reducing agent. Specifically, the silicone pressure sensitive adhesive composition is a condensation product, having a plasticity of less than 200 mils, of a benzene-soluble resinous copolymer containing silicon-bonded hydroxyl radicals and consisting essentially of triorganosiloxy units of the formula R3SiO1/2 and tetrafunctionalsiloxy units of the formula SiO4/2 in a ratio of about 0.6 to 0.9 triorganosiloxy units for each tetrafunctionalsiloxy unit present in the copolymer and a polydiorganosiloxane having a viscosity from 100 centipoise to 50,000 centipoise at 25°C.

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