Conversion of alpha-methylstyrene-type monomers in the...

Details Conversion of alpha-methylstyrene-type monomers in the... Conversion of alpha-methylstyrene-type monomers in the...

C - Chemistry, Metallurgy

08

F

400/2032

C08F 297/04 (2006.01) C08F 2/06 (2006.01) C08F 4/48 (2006.01) C08G 81/02 (2006.01)

Patent

CA 1142676

Abstract of the Disclosure Copolymers of alpha-methylstyrene-type monomers and conjugated diene monomers are prepared by polymerizing an alpha-methylstyrene monomer using a first polar activator, adding a small amount of a conjugated diene monomer to cap the block of alpha-methylstyrene-type monomer polymer, and further adding a conjugated diene monomer and polymerizing with a second polar activator effective for copolymerization of residual alpha-methylstyrene-type monomer. The resulting copolymer can be coupled to form linear or radial block copolymers.

359947

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