Title:
粘度指数向上剤及び潤滑油組成物
Document Type and Number:
Japanese Patent JP3996558
Kind Code:
B2
Abstract:
A viscosity index improver comprises a oil soluble copolymer having a weight average molecular weight of 3000-500000 containing 5-90 wt.% acrylic monomers, 5-90 wt.% of a monomer comprising 8-17 C alkyl(meth)acrylates or linear 18-24 C alkyl(meth)acrylates and 5-50 wt.% of an unsaturated monomer having hydroxyl, amide or carboxyl groups. A viscosity index improver (I) comprises a oil soluble copolymer having a weight average molecular weight of 3000-500000 containing: (a) 5-90 wt.% monomers of formula (1); (b) 5-90 wt.% of a monomer comprising 8-17 C alkyl(meth)acrylates or linear 18-24 C alkyl(meth)acrylates; (c) 5-50 wt.% of an unsaturated monomer having hydroxyl, amide or carboxyl groups and optionally; (d) 0-15 wt.% of other alkyl(meth)acrylates; (e) unsaturated 2-20C hydrocarbons (F) vinyl ketones; (f) unsaturated epoxy compounds; (g) halogen containing unsaturated monomers; (h) alkylalkenyl ethers; (i) alkenyl carboxylates and; (j) other nitrogen containing unsaturated monomers. CH2=C(R')-COO-(A-O)n-R (1) R' = N or CH3; A = 2-4C alkenyl; n = 0, 1-20; R = branched 18-36C alkyl that is free from polymethylene groups having more than 16C atoms Independent claims are included for: (1) a concentrate comprising 20-90 wt.% of the improver (I) and 10-80 wt.% diluent and; (2) a lubricating oil composition comprising a base oil and 0.01-45 wt.% of the viscosity improver (I).
Inventors:
Takeshi Yuki
Minoru Nishida
Minoru Nishida
Application Number:
JP2003205791A
Publication Date:
October 24, 2007
Filing Date:
August 04, 2003
Export Citation:
Assignee:
SANYO CHEMICAL INDUSTRIES,LTD.
International Classes:
C10M145/14; C10M127/02; C10M129/06; C10M129/08; C10M129/10; C10M129/16; C10M129/18; C10M129/24; C10M129/32; C10M129/34; C10M129/40; C10M129/42; C10M129/70; C10M129/72; C10M129/76; C10M131/00; C10M131/04; C10M133/16; C10M145/12; C10M145/16; C10M145/36; C10M145/38; C10M147/00; C10M149/00; C10M149/06; C10M149/10; C09K3/00; C10N20/02; C10N20/04; C10N30/00; C10N30/02; C10N40/04; C10N40/08; C10N40/25
Domestic Patent References:
| JP60110790A | ||||
| JP62141096A | ||||
| JP7102023A | ||||
| JP3831203B2 |