Title:
VISCOSITY INDEX IMPROVER
Document Type and Number:
Japanese Patent JP2928919
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a viscosity index improver which generates a small amt. of caulking by selecting a copolymer having structural units derived from an alkyl methacrylate and a specific monomer as the essential units.
SOLUTION: This improver is a copolymer having structural units derived from an alkyl methacrylate and a monomer selected from among a conjugated diene, (a substd.) acetylene, an alkyl vinyl ether, and an alkyl allyl ether as the essential units. An engine oil contg. this improver can reduce the amt. of caulking to the same level or lower of an engine oil contg. a conventionally used OCP viscosity index improver, has a low TBS viscosity and a high viscosity index, and thus can satisfy the requirement of automobiles, low fuel consumption.
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| WO/2011/138313 | USED LUBRICATING COMPOSITION |
| WO/2014/136643 | LUBRICANT OIL COMPOSITION |
| WO/1995/013272 | CHROMAN DERIVATIVE AND MEDICINAL USE THEREOF |
Inventors:
MATSUKA HIDEHIKO
TAKEUCHI KOJI
TAKEUCHI KOJI
Application Number:
JP9268797A
Publication Date:
August 03, 1999
Filing Date:
January 31, 1997
Export Citation:
Assignee:
SANYO KASEI KOGYO KK
International Classes:
C10M143/00; C10M143/12; C10M145/14; C10N30/02; C10N30/04; C10N30/08; C10N40/25; (IPC1-7): C10M145/14; C10M143/00; C10M143/12
Domestic Patent References:
| JP3250011A |
Other References:
【文献】欧州特許出願公開298667(EP,A1)