Block copolymers of diene having their terminal end blocks...

Details Block copolymers of diene having their terminal end blocks... Block copolymers of diene having their terminal end blocks...

C - Chemistry, Metallurgy

08

F

400/2042

C08F 257/02 (2006.01) C08F 297/04 (2006.01)

Patent

CA 1155248

Abstract of the Disclosure Block copolymers are prepared having end blocks with random copolymer of styrene and/or alkyl substituted derivatives and .alpha.-methylstyrene ranges from 1:0.5 to 1:2.5, a central block of a polydiene polymer joins the terminal blocks. The block copolymers contain from 10 to 90 weight percent of polydiene, the remaining portion being of random alkylstyrene-.alpha.-methylstyrene copolymer. The polymers range from medium impact polystyrene type polymer of low polydiene content to thermoplastic elastomers of high polydiene content. 27,797B-F

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