Lubricating oil compositions containing alkyl acrylate or methac

Details Lubricating oil compositions containing alkyl acrylate or methac Lubricating oil compositions containing alkyl acrylate or methac

1977-01-11

1978-02-14

Gantz, Delbert E.

Compositions

Electrolytes for electrical devices

252 59, C10M 128, C10M 118

Patent

active

040737381

ABSTRACT:
Mineral lubricating oil compositions which contain a predominant proportion of a mineral lubricating oil together with a pour point depressant based on alkyl acrylate or alkyl methacrylate polymers and a viscosity index (VI) improver comprising a special selectively hydrogenated copolymer of styrene and a conjugated diene. The VI improver employed is a selectively hydrogenated, random butadiene-styrene copolymer containing from 35 to 45% by weight of styrene and possessing a particular structure and distribution of the monomers. The compositions exhibit high stability to shear and may therefore in particular be used for lubricating I.C. engines or gearboxes.

REFERENCES:
patent: 3312621 (1967-04-01), Brownawell et al.
patent: 3600311 (1971-08-01), Naiman et al.
patent: 3772169 (1973-11-01), Small et al.
patent: 3948843 (1976-04-01), Saint-Pierre et al.
patent: 3959161 (1976-05-01), Dawans et al.
patent: 4031020 (1977-06-01), Sugiura

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