METHOD FOR HOMOPOLYMERIZATION OF ALPHA-OLEFINES AND COPOLIMERIZATION OF ALPHA-OLEFINS AND ALSO DIOLEFINS AND A CATALYST SYSTEM FOR HOMOPOLYMERIZATION OF ALPHA-OLEFINES AND COPOLYMERIZATION OF ALPHA-OLEFINS AND ALSO DIOLEFINS

摘要

Silicon-bridged transition metal compounds and their use as alpha -olefin polymerization catalysts are disclosed. A chiral silicon-bridged metallocene catalyst polymerizes alpha -olefins to high isotacity with a minimum of inversions at high rates of catalyst activity. The catalyst is easily made in high yields and readily separated from atactic meso forms.