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US 5,858,929 AGranted
Composition for providing anti-shudder friction durability performance for automatic transmissions
AssigneeThe Lubrizol Corporation
InventorsJames L. Sumiejski, William C. Ward, Mitsuo Higashi, Craig D. Tipton
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Abstract
A composition for use in lubricants and function fluids to provide improved anti-shudder and shudder durability properties to an automatic transmission. The composition comprises alkoxylated fatty amines as well as a mixture of other friction modifiers.
Claims5
A composition for use as a lubricant additive, said composition comprising:
- (A) A calcium salt of an overbased sulfonic acid having TBN of 20-300;
- (B) at least about 0.05 weight percent phosphoric acid;
- (C) three friction modifiers, wherein said friction modifiers comprise an alkoxylated fatty amine and two others selected from:
- borated fatty epoxides
- fatty phosphites
- fatty epoxides
- fatty amines
- borated alkoxylated fatty amrines
- metal salts of fatty acids
- fatty acid amides
- glycerol esters
- borated glycerol esters or
- fatty imidazolines;
- (D) disubstituted hydrogen phosphite antiwear agents or mixtures thereof;
- (E) a polymethacrylate dispersant viscosity modifier or maleic anhydride/styrene co-polymer viscosity modifier.
12 more elements
A composition for use as a lubricant additive, said composition comprising:
- (A) an overbased metal salt;
- (B) at least about 0.05 weight percent of a phosphorus acid, phosphorus acid salt, phosphorus acid ester, phosphite phosphorus-containing amide, phosphorus-containing carboxylic acid, phosphorus-containing carboxylic ester, phosphorus-containing ether, or mixtures thereof;
- (C) three friction modifiers comprising an alkoxylated fatty amine, a borated fatty epoxide and a fatty acid ester of glycerol;
- (D) an antiwear agent;
- (E) a viscosity modifier.
2 more elements
Dependencies are inferred from the claim text.