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US 5,348,670 AGranted
Phosphorous amine lubricant additives
AssigneeElco Corporation
InventorsRandolph A. McDonald, Gerald D. Burt
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Abstract
Lubricant additives are disclosed which are produced by reacting an alkanolamine, a carboxylic acid and phosphorous acid. The reaction product may also include a boron compound and/or a monofunctional alcohol. The additives are useful in combination with metalworking oils, particularly in extreme pressure applications, to replace currently used chlorinated paraffin additives.
Claims14
A lubricant additive comprising the reaction product of:
- (a) an alkanolamine of the formula:
- ##STR8## wherein each of R and R' are independently selected from the group consisting of hydrogen and a C.sub.1 to C.sub.6 alkyl group and x, y and z are each integers of from 0 to 10, at least one of which is not 0;
- (b) an aliphatic carboxylic acid of the formula:
- ##STR9## wherein R.sup.3 is a C.sub.1 to C.sub.30 hydrocarbon group;
- and (c) phosphorous acid;
- wherein said reaction is carried out at a temperature of about 50.degree. to about 250.degree. C. and the molar ratio of said alkanolamine to said phosphorous acid is about 0.1:1 to about 10:1.
3 more elements
Dependencies are inferred from the claim text.