Tetrahydroquinolines as antioxidants for lubricants

Details Tetrahydroquinolines as antioxidants for lubricants Tetrahydroquinolines as antioxidants for lubricants

1985-12-18

1987-09-08

Dixon, Jr., William R.

Compositions

Electrolytes for electrical devices

252 515R, 546152, 546166, 546178, C10M10556

Patent

active

046922580

ABSTRACT:
Lubricants can be rendered more resistant to oxidation with the aid of compounds of the formula I ##STR1## wherein R.sub.1 and R.sub.2 are independently hydrogen, alkyl or benzyl, R'.sub.2 is hydrogen or alkyl, R.sub.3 and R.sub.4 are independently alkyl, phenyl or benzyl, R.sub.5 is hydrogen or alkyl, and R.sub.6 is alkyl. In a preferred embodiment, these compounds are combined with a customary phenolic antioxidant.

REFERENCES:
patent: 1768910 (1930-07-01), Ihrig
patent: 2136788 (1938-11-01), Fairlie
patent: 2530774 (1950-11-01), Kehe
patent: 2647824 (1953-08-01), Jones et al.
patent: 2846435 (1958-08-01), Harris
patent: 2881061 (1959-04-01), Brennan et al.
patent: 3121691 (1964-02-01), Eickemeyer
patent: 3198763 (1965-08-01), Peterli
Smalheer et al., "Lubricant Additive", 1967, p. 7.

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