Title:
潤滑油用粘度指数向上剤および潤滑油組成物
Document Type and Number:
Japanese Patent JP4717264
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a viscosity index improver which has an excellent shear stability and yields a highly economical lubricating oil composition, and a lubricating oil composition containing this. SOLUTION: The viscosity index improver for lubricating oils comprises an olefin polymer of at least one α-olefin chosen from 2-20C α-olefins having a number average molecular weight of from 20,000 to 2,000,000 and a ratio Mw/Mn (wherein Mw is the weight average molecular weight; and Mn is the number average molecular weight) of <=1.5. The lubricating oil composition contains the viscosity index improver, a lubricating oil base material and, if required, a pour point-depressant.
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Inventors:
Kei Okada
Shin Ike
Ryosuke Kinshige
Tomoaki Matsuki
Shinichi Kojo
Terada Fujita
Shin Ike
Ryosuke Kinshige
Tomoaki Matsuki
Shinichi Kojo
Terada Fujita
Application Number:
JP2001165447A
Publication Date:
July 06, 2011
Filing Date:
May 31, 2001
Export Citation:
Assignee:
Mitsui Chemicals, Inc.
International Classes:
C10M143/00; C08F4/605; C08F210/16; C10M143/04; C10M145/14; C10N20/00; C10N20/04; C10N30/02; C10N30/06; C10N70/00
Domestic Patent References:
| JP60035009A | ||||
| JP2000351813A | ||||
| JP2000198892A | ||||
| JP2002515061A | ||||
| JP2002507225A |
Foreign References:
| WO2000060032A1 | ||||
| WO2000034420A1 |
Attorney, Agent or Firm:
Patent corporation ssinpat
Koji Makimura
Koji Makimura