Preparation of syndiotactic polypropylene

Abstract

Abstract PURPOSE:To improve yield and bulk density by polymerizing propylene in the presence of a catalyst consisting of a transition metal catalyst with an asymmetric ligand and aluminoxane wherein at least one of them is carried on an inactive carrier. CONSTITUTION:A syndiotactic polypropylene is obtd. by polymerizing propylene in the presence of a catalyst consisting of a transition metal catalyst (a) with an asymmetric ligand [e.g. isopropyl(cyclopentadienyl-1-fluorenyl)zirconium dichloride] and 10-1,000,000mol as much compd. (b) of the formula (wherein R is a 1-3C hydrocarbon residue) based on the component (a) wherein at least one of the components (a) and (b) is carried on an inactive carrier (e.g. silica) under ordinary pressure to 100kg/cm<2>-G at -100 to 200 deg.C.

Inventors

• 👤 Tadashi Asanuma
• 👤 正 浅沼
• 👤 Tetsunosuke Shiomura
• 👤 潮村　哲之助
• 👤 Osamu Uchida
• 👤 治 内田
• 👤 Shinryu Uchikawa
• 👤 進隆 内川

Bibliographic Details