Metal dialkyldithiophosphates
AssigneeTexaco Inc.
InventorsMorris A. Wiley, Raymond C. Schlicht, James O. Waldbillig
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Abstract
Novel metal dialkyldithiophosphates prepared from oxalkylated long, straight-chain alcohols, acids and mercaptans and their incorporation in lubricating oils to enhance the lubricity and other properties thereof; and a method for operation of an automatic transmission incorporating said oils.
Claims8
An automatic transmission fluid comprising at least about 80 wt. % of a mineral lubricating oil and from about 0.01 to 5.0 wt. % of an alkyl dithiophosphate represented by the formula:
- ##EQU8## wherein:
- R is a straight-chain aliphatic radial containing from about 4 to 30 carbon atoms;
- X is carbonyloxy;
- R' is selected from a hyrogen, alkyl, and aryl radical;
- M is selected from an alkali metal, an alkaline earth metal, and a transition metal;
- a is an integer of from about 2 to about 12;
- b is an integer of from about 1 to about 10;
- and
- n is an integer corresponding to the valence of M.
A method for operating an automatic transmission which comprises supplying to and running said transmission on a fluid oil composition comprising at least about 80% of a mineral lubricating oil and from about 0.01 to 5.0 wt. % of an alkyl dithiophosphate represented by the formula:
- ##EQU9## wherein:
- R is a straight-chain aliphatic radical containing from about 4 to 30 carbon atoms;
- X is carbonyloxy;
- R' is selected from a hydrogen, alkyl and aryl radical;
- M is selected from an alkali metal, an alkaline earth metal, and a transition metal;
- a is an integer of from about 2 to about 12;
- b is an integer of from about 1 to about 10;
- n is an integer corresponding to the valence of M.
Dependencies are inferred from the claim text.