Ashless antiwear-antioxidant lubricating oil additive

Details Ashless antiwear-antioxidant lubricating oil additive Ashless antiwear-antioxidant lubricating oil additive

1993-08-02

1995-04-11

McAvoy, Ellen M.

Compositions

Electrolytes for electrical devices

252 467, 558177, 558186, 558194, C10M13710, C10M13520

Patent

active

054055440

ABSTRACT:
Beta-hydroxyalkyl-bis(alkylthiomethylphenyl) dithiophosphate esters represented by the formulas ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are each H, a (C.sub.1 -C.sub.40) alkyl group, --CH.sub.2 SR, --C.sub.6 H.sub.5 or --C.sub.6 H.sub.4 --R.sub.5 providing at least one of R.sub.1, R.sub.2 and R.sub.3 is --CH.sub.2 SR; R.sub.4 is H or a (C.sub.1 -C.sub.40) alkyl group; R is H or a (C.sub.1 -C.sub.40) alkyl group, --C.sub.6 H.sub.5 or --C.sub.6 H.sub.4 --R.sub.5 ; and R.sub.5 is a (C.sub.1 -C.sub.40) alkyl group.

REFERENCES:
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patent: 3042703 (1962-07-01), Schegk et al.
patent: 3197404 (1965-07-01), Berger et al.
patent: 3346667 (1967-10-01), Firth
patent: 3683054 (1972-08-01), Wollensak et al.
patent: 3991141 (1976-11-01), Beriger et al.
patent: 4834893 (1989-05-01), Doner et al.
patent: 5037567 (1991-08-01), Farng et al.

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