Tapered block styrene/butadiene copolymers

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

C - Chemistry, Metallurgy

08

F

400/2043

C08F 297/04 (2006.01) C08J 5/18 (2006.01)

Patent

CA 2028410

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 second monomer alternating 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 shrink film packaging applications.

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