Lubricating oil

Details Lubricating oil Lubricating oil

1991-12-04

1993-10-05

Johnson, Jerry D.

Compositions

Electrolytes for electrical devices

252 495, 252 515A, 252 56R, 252 56S, 252 56D, 252 68, C10M12916, C10M14504, C10M14524

Patent

active

052502058

ABSTRACT:
A lubricating oil comprising a copolymer of monomers comprising as essential ingredients a compound represented by formula (1) and one of maleic anhydride, maleic acid, a salt of maleic acid, and an ester of maleic acid ##STR1## where Z represents a residue of a compound having from 2 to 8 hydroxyl groups; AO represents one or more kinds of oxyalkylene groups each having from 2 to 18 carbon atoms, provided that in the case of two or more kinds of oxyalkylene groups, the oxyalkylene groups are linked to one another in either a block or a random arrangement; R represents an alkenyl group having from 2 to 5 carbon atoms; R.sup.1 represents a hydrocarbon or acyl group having from 1 to 24 carbon atoms; and a.gtoreq.0, b.gtoreq.0, c.gtoreq.0, l is a positive integer, and m and n independently are 0 or a positive integer, provided that l+m+n=2 to 8, n/(l+m).ltoreq.1/2, and al+bm+cn=1 to 1,000.

REFERENCES:
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patent: 4404114 (1983-09-01), Mohr et al.
patent: 4469611 (1984-09-01), Snyder et al.
patent: 4689166 (1987-08-01), Dohner
patent: 4946904 (1990-08-01), Akimoto et al.
patent: 4946918 (1990-08-01), Akiyama et al.
patent: 4959169 (1990-09-01), McGraw et al.
Patent Abstracts of Japan, vol. 13, No. 427 (C-639) [3775], Sep. 22, 1989; & JP-A-1 163 297 (Nippon Oil & Fats Co., Ltd.) Jun. 27, 1989.
Patent Abstracts of Japan, vol. 6, No. 127 (C-113) [1005], Jul. 13, 1982; & JP-A-57 51 795 (Nippon Yushi K.K.); Mar. 26, 1982.

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