Tapered block styrene/butadiene copolymers

Details Tapered block styrene/butadiene copolymers Tapered block styrene/butadiene copolymers

C - Chemistry, Metallurgy

08

F

C08F 297/04 (2006.01)

Patent

CA 2052387

A method for preparing tapered block copolymers in a polymerization process by charging an initiator and monomers sequentially with one or more charges of first one of the monomers, then with a mixture of the two monomers, and then with one or more charges of the first monomer to produce a polymodal tapered block copolymer. Suitable monomers include conjugated dienes and monovinylaromatic compounds. The copolymers are particularly useful for applications requiring environmental stress crack resistance.

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