Patent ID: 6350834
Filing Date: 2002-02-26
Classification: C08F

Abstract:
A process for the homopolymerization of vinylaromatic monomers or block copolymerization of vinylaromatic monomers and dienes in the presence of an initiator composition consisting essentially ofI) at least one alkali metal organyl, alkali metal alkoxide, alkali metal thiolate or alkali metal amide and II) at least one aluminum organyl, aluminoxane, boron organyl or boroxane wherein the initiator composition contains, based on the sum of molar equivalents of alkali metal, aluminum and boron a) from 0.1 to 3.9 molar equivalents of oxygen, sulfur or nitrogen and b) from 0.1 to 3.9 molar equivalents of an organyl ligand.