LUBRICATING OIL COMPOSITION AND AUTOMOTIVE TRANSMISSION OIL USING SAME

WIPO Patent Application WO/2014/010735

A1

The purpose of the present invention is to provide a lubricating oil composition that has a low viscosity, very high viscosity index, and excellent shear stability. A lubricating oil composition containing components (A) to (C), where (A) is a low-viscosity synthetic oil which is a compound containing ether bonds in the molecules and for which the dynamic viscosity at 40°C is less than 10 mm2/s, the ratio of the number of oxygen atoms and the number of carbon atoms that constitute the compound (O/C ratio) and the dynamic viscosity of the compound (mm2/s) at 40°C satisfying the formula (Dynamic viscosity at 40°C ≤ 12-[(O/C ratio)×30]); (B) is one or more high-viscosity synthetic oils which are hydrocarbon-based synthetic oils having a dynamic viscosity at 100°C of 40 mm2/s or higher, and which are selected from α-olefin oligomers, hydrides thereof, and ethylene-propylene copolymer oligomers; and (C) is a polymethacrylate having a weight-average molecular weight of 50,000 or lower.

TAMOTO YOSHITAKA (JP)
ICHIHASHI TOSHIHIKO (JP)
YOKOMIZO MASATO (JP)

PCT/JP2013/069200

January 16, 2014

July 12, 2013

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IDEMITSU KOSAN CO (JP)
TAMOTO YOSHITAKA (JP)
ICHIHASHI TOSHIHIKO (JP)
YOKOMIZO MASATO (JP)

C10M169/04; C10M105/18; C10M105/34; C10M105/36; C10M107/02; C10M107/06; C10M107/34; C10M125/22; C10M125/24; C10M133/10; C10M133/16; C10M135/10; C10M159/24; C10N10/04; C10N20/02; C10N20/04

JP2011168677A	2011-09-01
JP2011162652A	2011-08-25
JP2009292997A	2009-12-17
JP2004277712A	2004-10-07
JP2009292997A	2009-12-17
JP2008179662A	2008-08-07
JP2010143968A	2010-07-01

See also references of EP 2873721A4

OHTANI, Tamotsu et al. (JP)
Tamotsu Otani (JP)

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