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Title:
VISCOSITY INDEX IMPROVER AND LUBRICANT COMPOSITION
Document Type and Number:
WIPO Patent Application WO/2007/116759
Kind Code:
A1
Abstract:
Disclosed is a viscosity index improver which is excellent in shear stability, viscosity index improvability and low-temperature viscosity characteristics. Also disclosed are a lubricant composition containing such a viscosity index improver, and a monomer which is used for producing such a viscosity index improver. Specifically disclosed is a viscosity index improver composed of a copolymer (A) which contains a monomer (a) represented by the general formula (1) below as a constituent monomer. Also specifically disclosed is a lubricant composition containing the viscosity index improver and a base oil, and a monomer composition containing the monomer (a).

Inventors:
YUKI TSUYOSHI (JP)
HAMANO KAZUKI (JP)
Application Number:
PCT/JP2007/056453
Publication Date:
October 18, 2007
Filing Date:
March 27, 2007
Export Citation:
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Assignee:
SANYO CHEMICAL IND LTD (JP)
YUKI TSUYOSHI (JP)
HAMANO KAZUKI (JP)
International Classes:
C09K3/00; C08F220/26; C08F290/06; C08F299/00; C10M101/02; C10M137/04; C10M137/08; C10M145/14; C10M169/04; C10N20/00; C10N20/02; C10N20/04; C10N30/02; C10N30/08; C10N40/04; C10N40/06; C10N40/08; C10N40/25
Foreign References:
JP2003147332A2003-05-21
GB852332A1960-10-26
JPH0748421A1995-02-21
JPH0762372A1995-03-07
JP2732187B21998-03-25
JP2941392B21999-08-25
JP2002302687A2002-10-18
JP2004124080A2004-04-22
JP2005187736A2005-07-14
US5384336A1995-01-24
US6740621B22004-05-25
JP2006509899A2006-03-23
JPH0922742A1997-01-21
JP2669553B21997-10-29
Other References:
See also references of EP 2009074A4
TAKEHIKO FUJIMOTO: "Shin. Kaimenkasseizai Nyumon", SANYO CHEMICAL INDUSTRIES, LTD., pages: 197 - 201
Attorney, Agent or Firm:
YASUTOMI, Yasuo et al. (5-36 Miyahara 3-chome, Yodogawa-ku, Osaka-sh, Osaka 03, JP)
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