Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1997-11-26
2000-03-28
Wu, David W.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526153, 526160, 526351, 526904, 526943, 502152, 502155, C08F 464
Patent
active
060433256
ABSTRACT:
A process for olefin polymerization, including polymerizing or copolymerizing an olefin in the presence of an olefin polymerization catalyst composed of: a fine particle carrier; (A) a transition metal compound of a Group IVB metal of the periodic table, containing a ligand having a cyclopentadienyl skeleton; (B) an aluminoxane compound; and optionally (C) an organoaluminum compound, wherein said aluminoxane compound has an alkyl groups to aluminum ratio of 1.3 to 2.1; said transition metal compound (A) and said organoaluminum oxy-compound (B) and said organoaluminum compound being supported on the fine particle carrier; and said solid catalyst having a bulk density of 0.3 g/cm.sup.3 to 0.5 g/cm.sup.3 and a fluidity index of 45 to 70 and an olefin polymerization process using the olefin polymerization catalyst; and an olefin prepolymerized catalyst obtained by prepolymerizing the catalyst, and an olefin polymerization process using the olefin prepolymerized catalyst. The olefin polymerization process produces a polymer showing excellent particle properties and an olefin polymer which does not stick to the wall of the polymerization reactor.
REFERENCES:
patent: 5446001 (1995-08-01), Gurtzgen
patent: 5455316 (1995-10-01), Tsutsui et al.
Imuta Jun-ichi
Matsumoto Tetsuhiro
Ohgizawa Masaaki
Tsutsui Toshiyuki
Yoshitsugu Ken
Mitsui Chemicals Inc.
Wu David W.
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