Title:
POLYMERIZATION CATALYST
Document Type and Number:
WIPO Patent Application WO/2003/095503
Kind Code:
A1
Abstract:
A catalyst for polymerization of a conjugated diene or the like, comprising a metallocene cation complex of gadolinium compound. For example, it is a catalyst consisting of a metallocene cation complex of trivalent gadolinium compound represented by the general formula (I): RaGdXb (wherein Gd is gadolinium; R represents a cyclopentadienyl group, a substituted cyclopentadienyl group, an indenyl group, a substituted indenyl group, a fluorenyl group or a substituted fluorenyl group; X represents an anion; a is an integer of 1 or 2; and b is an integer of 1 or 2). This catalyst enables performing polymerization of a conjugated diene or copolymerization of a conjugated diene and an aromatic vinyl compound efficiently with low cost.
Inventors:
KAITA SHOJIRO (JP)
HOU ZHAOMIN (JP)
WAKATSUKI YASUO (JP)
DOI YOSHIHARU (JP)
HOU ZHAOMIN (JP)
WAKATSUKI YASUO (JP)
DOI YOSHIHARU (JP)
Application Number:
PCT/JP2003/005774
Publication Date:
November 20, 2003
Filing Date:
May 08, 2003
Export Citation:
Assignee:
RIKEN (JP)
KAITA SHOJIRO (JP)
HOU ZHAOMIN (JP)
WAKATSUKI YASUO (JP)
DOI YOSHIHARU (JP)
KAITA SHOJIRO (JP)
HOU ZHAOMIN (JP)
WAKATSUKI YASUO (JP)
DOI YOSHIHARU (JP)
International Classes:
C08F4/54; C08F4/60; C08F4/603; C08F4/52; C08F36/00; C08F36/04; C08F136/08; C08F212/00; (IPC1-7): C08F4/52; C08F4/54; C08F36/04
Domestic Patent References:
| WO2000052062A1 | 2000-09-08 |
Foreign References:
| JP2002256012A | 2002-09-11 |
Other References:
YU GANGQIAN ET AL.: "Stereospecific polymerization of diolef-in in the presence of a new type of catalytic system based on cyclopentadienyl dichlorides of the lanthanides", KEXUE TONGBAO (FOREIGN LANGUAGE EDITION), vol. 29, no. 3, 1984, pages 421 - 422, XP002969584
See also references of EP 1512700A4
See also references of EP 1512700A4
Attorney, Agent or Firm:
Kawaguchi, Yoshiyuki (4-10 Higashi Nihonbashi 3-chom, Chuo-ku Tokyo, JP)
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