C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 81/00 (2006.01) B32B 25/10 (2006.01) B32B 27/08 (2006.01) C08G 77/442 (2006.01) C08L 53/02 (2006.01) C08L 83/10 (2006.01)
Patent
CA 2072671
FS-9008061 ABSTRACT Title: BLOCK COPOLYMERS OF POLYSILOXANES AND COPOLYMERS OF CONJUGATED DIENES AND AROMATIC VINYL COM- POUNDS, AND MULTILAYER STRUCTURES CONTAINING SAME Block copolymers are described which comprise alternating blocks of (A) a polysiloxane; and (B) a copolymer of a 1,3-conjugated diene and a monovinyl aromatic compound. The block copolymers can be prepared by reacting a polysiloxane with a dilithiated copolymer of a conjugated diene and a monovinyl aromatic compound and thereafter neutralizing the reaction product with a protonic acid or a polyfunctional alkyl silane or silicon tetrachloride. Cured elastomer compositions exhibiting surface release characteristics are obtained by curing a mixture comprising the above-described block copolymer in the presence of a curing system comprising a peroxide and sulfur. Multilayer elastomer structures useful in manufacturing articles from elastomeric materialsalso are described wherein at least a portion of an outer layer of the multilayer elastomer structure has release characteristics and comprises the cured block copolymers of the present invention.
Graves Daniel F.
Hergenrother William L.
Bridgestone Corporation
Swabey Ogilvy Renault
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