Document Type and Number:
Japanese Patent JP5301305
Kind Code:
B2
Abstract:
To provide a lubricant composition for a continuously variable transmission enhancing a coefficient of static friction in a wet friction material and an inter-metal friction coefficient between a belt and a pulley while suppressing shock at bonding of the wet friction material and making fuel economy-saving by low viscosity and part durability compatible.
The lubricant composition for the continuously variable transmission contains a lubricant base oil, (A) 0.1-5.0 mass% of a compound represented by formula (1) (wherein, R1represents a 1-20C alkyl group), (B) 450-700 mass ppm of at least one kind of a compound selected from a basic calcium sulfonate and a basic calcium phenate in terms of Ca amount, and 0.5-20 mass% of at least one kind of a non-dispersion type polymethacrylate based viscosity index enhancing agent having Mw of 10,000-50,000 (C-1) and Mw of 60,000-500,000 (C-2) and Mw/Mn of 1.0-1.5 based on the whole amount of the lubricant composition. In the lubricant composition, dynamic viscosity at 100°C is 5.8-6.5 mm2/s and the viscosity index is 150-180.
COPYRIGHT: (C)2010,JPO&INPIT
Inventors:
Takahiro Taya
Koichi Sakamoto
Application Number:
JP2009022792A
Publication Date:
September 25, 2013
Filing Date:
February 03, 2009
Assignee:
Cosmo Oil Lubricants Co., Ltd.
International Classes:
C10M167/00; C10M169/04; C10M101/02; C10M135/34; C10M145/14; C10M159/22; C10M159/24; C10N10/04; C10N20/00; C10N20/02; C10N20/04; C10N30/00; C10N30/02; C10N30/06; C10N40/04
Domestic Patent References:
| JP52003585A | | | | |
| JP2006117854A | | | | |
| JP2007326963A | | | | |
| JP2002226883A | | | | |
| JP2007126541A | | | | |
Foreign References:
| WO2008076825A1 | | | | |
| WO2006009083A1 | | | | |
| WO2007001000A1 | | | | |
Attorney, Agent or Firm:
Atsushi Nakajima
Kato Kazunori
Katsuichi Nishimoto
Hiroshi Fukuda
