Title:
ポリプロピレンの製造
Document Type and Number:
Japanese Patent JP2004510849
Kind Code:
A
Abstract:
A process for producing polypropylene, the process comprising homopolymerising propylene or copolymerising propylene with one or more comonomers selected from ethylene and C4 to C10 1-olefins in the presence of a metallocene catalyst system comprising (a) a metallocene catalyst of general formula R"(XRm) (Cp'R'n)MQ2, wherein X is a cyclopentadienyl moiety (Cp) or a heteroatom, Cp' is a substituted or unsubstituted fluorenyl ring; each R is independently hydrogen or hydrocarbyl having 1 to 20 carbon atoms in which 0 ≤ m ≤ 4; each R' is independently hydrocarbyl having 1 to 20 carbon atoms in which 0 ≤ n ≤ 8; R" is a bridge which comprises a C1-C20 alkylene radical, a dialkyl germanium or silicon or siloxane, or an alkyl phosphine or amine radical, which bridge is substituted or unsubstituted, M is a Group IVB transition metal, vanadium or a lanthanide metal and each Q is hydrocarbyl having 1 to 20 carbon atoms or halogen, and (b) a cocatalyst which activates the catalyst component, the homo- or co- polymerisation being performed in a slurry process in a hydrocarbon diluent for the polypropylene or being performed in a solution process in a hydrocarbon solvent for the polypropylene, the concentration of propylene monomer in the diluent or solvent being lower than 70% by weight, based on the weight of the diluent or solvent, to produce a polypropylene homopolymer or copolymer having long chain branches on the polypropylene molecules.
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Inventors:
Dobra, Gi
Deyupil, Marc
Michel, Jack
Deyupil, Marc
Michel, Jack
Application Number:
JP2002532504A
Publication Date:
April 08, 2004
Filing Date:
October 03, 2001
Export Citation:
Assignee:
Atofina Research Society Anonym
International Classes:
C08F4/605; C08F2/06; C08F2/14; C08F4/6192; C08F4/6592; C08F10/06; C08F110/06; C08F4/659; (IPC1-7): C08F4/605; C08F10/06
Attorney, Agent or Firm:
Heikichi Odashima