Lubricating oil composition

Details Lubricating oil composition Lubricating oil composition

1989-06-01

1992-02-25

Medley, Margaret B.

Compositions

Electrolytes for electrical devices

252 50, 252 56R, C10M14108

Patent

active

050910990

ABSTRACT:
Phosphite-free lubricating oil composition which comprises a) a mineral oil or a synthetic oil or a mixture thereof, and b) a mixture containing at least one aromatic amine of the formula (I), ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.3 ' are as defined in claim 1, and at least one phenol of the formula ##STR2## in which R.sup.4, R.sup.5 and A are as defined in claim 1, and the compounds are present in the mixture in a ratio of 2 to 6 parts by weight of the aromatic amine(s) of the formula I to 1 part by weight of the phenol(s) of the formula II.
The lubricating oil compositions are highly resistant to ageing and are effective in preventing black sludge formation.

REFERENCES:
patent: 2009480 (1935-07-01), Craig
patent: 2691632 (1954-10-01), Harle
patent: 3322649 (1967-05-01), O'Shea
patent: 3345292 (1967-10-01), Neale et al.
patent: 3368975 (1968-02-01), Davis et al.
patent: 3505225 (1970-04-01), Wheeler
patent: 4370434 (1983-01-01), Kline
patent: 4704219 (1987-11-01), Shaw
patent: 4741846 (1988-05-01), Evans
patent: 4759862 (1988-07-01), Meier
patent: 4824601 (1989-04-01), Franklin
patent: 4846985 (1989-07-01), Rizvi et al.

Affiliated with

Also associated with

Rating

Lubricating oil composition does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lubricating oil composition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lubricating oil composition will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1891017