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US 5,084,197 AGranted
Antiemulsion/antifoam agent for use in oils
AssigneeThe Lubrizol Corporation
InventorsMary Galic, Scott T. Jolley, Mary F. Salomon
Life of this patent
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Abstract
The present invention deals with a particular antiemulsion agent which is useful in retarding foam and/or emulsion formation in an engine. In particular, the agent is effective at preventing or retarding emulsion of foaming in an engine oil.
Claims8
A composition comprising:
- (A) a polymer corresponding to the formula HO(CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 O).sub.n H wherein n is from 10 to 50;
- and at least one of B--E:
- (B) at least one of a sodium, calcium or magnesium detergent;
- (C) a dispersant;
- (D) a zinc dialkyldithiophosphate;
- (E) a viscosity improver;
- and
- (F) an antioxidant.
5 more elements
A concentrate containing optionally 10 to 70 parts by weight of an oil of lubricating viscosity and 30 to 90 parts by weight of:
- (A) a polymer corresponding to the formula HO(CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 O).sub.n H wherein n is from 10 to 50;
- and at least one of B--F:
- (B) at least one of a sodium, calcium or magnesium detergent;
- (C) a dispersant;
- (D) a zinc dialkyldithiophosphate;
- (E) a viscosity improver;
- and
- (F) an antioxidant.
5 more elements
Dependencies are inferred from the claim text.