Aqueous metal-working composition and process
AssigneePhillips Petroleum Company
InventorsMerlin R. Lindstrom, Bernard A. Baldwin
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Abstract
Novel metal-working process and aqueous metal-working fluids are provided. The aqueous metal-working fluids contain at least one sodium hydrocarbylthiocarboxylate as an extreme pressure (EP) additive.
Claims23
A composition comprising an aqueous metal-working fluid and an alkali metal hydrocarbylthiocarboxylate in an amount sufficient to impart extreme pressure lubricating properties to the metal-working fluid wherein the hydrocarbylthiocarboxylate of the alkali metal hydrocarbylthiocarboxylate is selected from the group consisting of:
- R--S--R'CO.sub.2.sup.(-)
- and
- (--R--S--R'CO.sub.2.sup.(-)).sub.2
- wherein R represents an aryl, alkyl, or alkylene group having 1 to 20 carbon atoms, and R' represents an alkyl or alkylene group having 1 to 6 carbon atoms.
A method for enhancing the extreme pressure lubricating properties of an aqueous metal-working composition, said method comprising admixing therein an effective extreme pressure lubricating improving amount of at least one alkali metal hydrocarbylthiocarboxylate wherein the hydrocarbylthiocarboxylate of said alkali metal hydrocarbylthiocarboxylate is selected from the group consisting of:
- R--S--R'CO.sub.2.sup.(-)
- and
- (--R--S--R'CO.sub.2.sup.(-)).sub.2
- wherein R represents an aryl, alkyl, or alkylene group having 1 to 20 carbon atoms, and R' represents an alkyl or alkylene group having 1 to 6 carbon atoms.
A composition comprising an aqueous metal-working fluid and an alkali metal hydrocarbylthiocarboxylate in an amount sufficient to impart extreme pressure lubricating properties to the metal-working fluid wherein the hydrocarbythiocarboxylate of said alkali metal hydrocarbylthiocarboxylate is selected from:
- R--S--R'CO.sub.2.sup.(-)
- and
- (--R--S--R'CO.sub.2.sup.(-)).sub.2
- wherein R represents an alkyl or alkylene group having 1 to 20 carbon atoms, and R' represents an alkyl or alkylene group having 1 to 6 carbon atoms.
Dependencies are inferred from the claim text.