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Title:
PROCESS FOR PRODUCING CONJUGATED DIENE POLYMER, CONJUGATED DIENE POLYMER, AND RUBBER COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2007/066651
Kind Code:
A1
Abstract:
A process for producing a conjugated diene polymer in which a conjugated diene polymer with narrow molecular weight distribution and high cis-bond content can be easily produced at low cost. This process comprises the polymerization step of polymerizing a conjugated diene compound with the use of a catalyst composition containing a rare earth element-containing compound or a reaction product of the compound with a Lewis base, aluminoxane and/or an organoaluminum compound and an iodine-containing compound to thereby obtain a conjugated diene polymer having a cis-1, 4-bond content of 98.5 mass% or higher and a ratio (Mw/Mn) of weight average molecular weight (Mw) to number average molecular weight (Mn) of 2.5 or less measured by gel permeation chromatography.

Inventors:
NAKAMURA TAKAHIRO (JP)
TANI KOUICHIROU (JP)
TANAKA RYOUJI (JP)
SONE TAKUO (JP)
TADAKI TOSHIHIRO (JP)
KURAZUMI JUNKO (JP)
MASAKI KOJI (JP)
OZAWA YOICHI (JP)
Application Number:
PCT/JP2006/324246
Publication Date:
June 14, 2007
Filing Date:
December 05, 2006
Export Citation:
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Assignee:
JSR CORP (JP)
BRIDGESTONE CORP (JP)
NAKAMURA TAKAHIRO (JP)
TANI KOUICHIROU (JP)
TANAKA RYOUJI (JP)
SONE TAKUO (JP)
TADAKI TOSHIHIRO (JP)
KURAZUMI JUNKO (JP)
MASAKI KOJI (JP)
OZAWA YOICHI (JP)
International Classes:
C08F36/04; C08F4/54; C08K3/04; C08K3/36; C08L9/00
Domestic Patent References:
WO2000052062A12000-09-08
Foreign References:
JPS581709A1983-01-07
JPS5440890A1979-03-31
JPS378198B1
JPH10306113A1998-11-17
JPH1135633A1999-02-09
JP2000034320A2000-02-02
Other References:
FINE CHEMICALS, vol. 23, no. 9, 1994, pages 5
J. AM. CHEM. SOC., vol. 115, 1993, pages 4971
J. AM. CHEM. SOC., vol. 117, 1995, pages 6465
Attorney, Agent or Firm:
WATANABE, Kazuhira (No.8 Kikuboshi Tower Building 20-18, Asakusabashi 3-chom, Taito-ku Tokyo 53, JP)
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