Title:
OIL FILM THICKNESS INCREASING AGENT AND LUBRICANT COMPOSITION
Document Type and Number:
Japanese Patent JP2009007562
Kind Code:
A
Abstract:
To provide an oil film thickness increasing agent excellent in shear stability and viscosity index improving performance.
The oil film thickness increasing agent comprises a copolymer (A) which comprises an alkyl (meth)acrylate (a) with a 1-36C alkyl group as an essential constituent monomer and satisfies the following requirements (i)-(iv): (i) the adsorption INDEX determined by a test of adsorption to iron oxide is 1.5; (ii) the coefficient Km representing the intermolecular interaction calculated by the Martin's formula is 1; (iii) the average side chain length calculated based on the molar percentages of monomer units is 11; and (iv) the weight average molecular weight is 3,000-1,000,000.
Inventors:
YUKI TAKESHI
MATSUBA SATOSHI
NODA MANAMI
UTSUI SATOSHI
NAKAJIMA SHINGO
MATSUBA SATOSHI
NODA MANAMI
UTSUI SATOSHI
NAKAJIMA SHINGO
Application Number:
JP2008137503A
Publication Date:
January 15, 2009
Filing Date:
May 27, 2008
Export Citation:
Assignee:
SANYO CHEMICAL IND LTD
International Classes:
C10M145/14; C08F220/10; C10M137/02; C10M137/04; C10M149/04; C10M149/06; C10M153/02; C08F20/68; C10N20/00; C10N20/02; C10N20/04; C10N30/00; C10N30/02; C10N30/06; C10N40/04; C10N40/06; C10N40/08; C10N40/25
Domestic Patent References:
| JP2005187736A | 2005-07-14 | |||
| JP2007002009A | 2007-01-11 | |||
| JP2002302687A | 2002-10-18 | |||
| JP2003292938A | 2003-10-15 | |||
| JP2006117854A | 2006-05-11 | |||
| JP2006117851A | 2006-05-11 |
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