Lubricating oil additive compositions

Details Lubricating oil additive compositions Lubricating oil additive compositions

1975-10-20

1978-05-09

Gantz, Delbert E.

Compositions

Electrolytes for electrical devices

252 45, 252 467, 252 486, 252 499, 252400A, C10M 148, C10M 342, C10M 524, C10M 746

Patent

active

040885879

ABSTRACT:
A lubricating oil additive composition which imparts improved oxidation properties to lubricants and industrial oils comprises an antioxidant selected from oil-soluble, sterically hindered phenols or thiophenols, oil-soluble aromatic amines and organic sulfur compounds containing from 3 to 40 weight percent sulfur which is present within the compound as an organic sulfide or polysulfide or mixtures thereof, and a phosphorus-containing composition prepared by reacting phosphorus oxychloride or phosphorus thiochloride with a 1,2-substituted imidazoline in which the 1-substituent is hydroxyalkyl of 1 to 10 carbon atoms and the 2-substituent is an aliphatic hydrocarbon of 6 to 24 carbon atoms or an oil-soluble N-aliphatic-substituted amino alkylene amide of a higher fatty acid containing 6 to 24 carbon atoms and containing a terminal hydroxy group in the aliphatic substituent, said alkylene group containing from 2 to 5 carbon atoms and said aliphatic radical containing 1 to 10 carbon atoms, or mixtures thereof, the weight ratio of antioxidant to phosphorus-containing compound being 1:0.001-21. Compositions containing this antioxidant additive composition preferably contain from 2 to 40 millimols of zinc per kilogram present as an cil-soluble salt.

REFERENCES:
patent: 3562159 (1971-02-01), Mastin
patent: 3652410 (1972-03-01), Hollinghurst et al.
patent: 3732167 (1973-05-01), Foucher et al.
patent: 3846317 (1974-11-01), Lintzenich
patent: 3868376 (1975-02-01), Hotten
patent: 3909425 (1975-09-01), Crawford et al.

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