LUBRICANT COMPOSITION FOR TRANSMISSION

WIPO Patent Application WO/2006/043709

A1

Disclosed is a lubricant composition for transmissions which has low viscosity while achieving long fatigue life. Specifically disclosed is a lubricant composition for transmissions which is obtained by blending a lubricant base oil (A) prepared to have a kinematic viscosity at 100&ring C of 1.5-6 mm²/s with a poly(meth)acrylate additive (B) so that the resulting composition has a kinematic viscosity at 100&ring C of 3-8 mm²/s and a viscosity index of 95-200. The lubricant base oil (A) is composed of a lubricant base oil (A1) having a kinematic viscosity at 100&ring C of not less than 1.5 and less than 7 mm²/s, or the lubricant base oil (A1) and a lubricant base oil (A2) having a kinematic viscosity at 100&ring C of 7-50 mm²/s. In this connection, the components (A) and (B) further satisfy certain conditions.

WO/1992/022623	AN ELECTROVISCOUS FLUID BASED ON POLYETHER ACRYLATES AS DISPERSE PHASE,
WO/2015/151769	LUBRICATING OIL COMPOSITION FOR GAS ENGINES
WO/2015/027365	HELICAL MACROMOLECULE FRICTION MODIFIER WITH TWO POLAR ENDS

MATSUOKA TORU (JP)
ITOU MASAAKI (JP)

PCT/JP2005/019644

April 27, 2006

October 19, 2005

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NIPPON OIL CORP (JP)
MATSUOKA TORU (JP)
ITOU MASAAKI (JP)

C10M145/14; C10M149/02; C10M163/00; C10M169/04; C10M101/02; C10M107/02; C10M133/16; C10M137/00; C10N20/02; C10N30/00; C10N30/02; C10N30/06; C10N30/10; C10N40/04

JPH093131A	1997-01-07
JP2001262176A	2001-09-26
JP2004169025A	2004-06-17
JP2004155873A	2004-06-03
JP2004155924A	2004-06-03
JP2005154760A	2005-06-16
JPH0339399A	1991-02-20
JPH07268375A	1995-10-17
JP2000063869A	2000-02-29
JP2001262176A	2001-09-26
JP2004155873A	2004-06-03
JP2002105478A	2002-04-10

See also references of EP 1808476A4

Morita, Nobuyuki (5-8 Nishi-shimbashi 3-chom, Minato-ku Tokyo 03, JP)

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