Block copolymer preparation from vinyl aromatic monomer and diene

摘要

Block copolymer preparation from vinyl aromatic monomer and diene comprises polymerizing in presence of alkali metal organyl or alkanolate and magnesium, aluminum or zinc organyl, where process is controllable at high monomer concentrations. Preparation of block copolymers from vinyl aromatic monomers and dienes comprises polymerizing in the presence of at least one alkali metal organyl or alkali metal alkanolate and at least one magnesium, aluminum or zinc organyl.