Title:
粘度指数向上剤および潤滑油組成物
Document Type and Number:
Japanese Patent JP5246992
Kind Code:
B2
Abstract:
The invention provides a viscosity index improver excellent in shear stability and viscosity index improving ability. This viscosity index improver comprises a copolymer (A) that has a monomer (a) represented by general formula (1) as an essential structural monomer and a Z average molecular weight of 10,000-1,000,000. The general formula (1) is represented by CH2=C(R<1>)-COO(A-O)n-(CH2)p-CH(R<2>)-R<3>(1) wherein, R<1> is a hydrogen atom or a methyl group, R<2> and R<3> are each a 1-16C straight chain alkyl group or a 3-34 C branched alkyl group, R<2> and R<3> may be identical or different, a number of continuous methylene groups in the branched alkyl group is less than or equal to 16, the total of carbon numbers of R<2>, R<3> and p CH2 >groups is 17-35, A is a 2-4C alkylene group, n is an integer of 0 or 1-20, and p is an integer of 0 or 1-15.
Inventors:
Takeshi Yuki
Application Number:
JP2005180670A
Publication Date:
July 24, 2013
Filing Date:
June 21, 2005
Export Citation:
Assignee:
SANYO CHEMICAL INDUSTRIES,LTD.
International Classes:
C10M145/14; C10M137/02; C10M137/04; C10M137/08; C10M145/38; C10M149/02; C10M149/04; C10M149/08; C10M169/04; C10N20/00; C10N20/02; C10N20/04; C10N30/02
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