Hydrogen sulfide suppression with amine derivative
First Claim
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1. A functional fluid, comprising:
- (A) an oil of lubricating viscosity;
(B) a sulfurized organic compound selected from the group consisting of fats, alpha-olefins, fatty acid esters and triglycerides; and
(C) a hindered imine of general structural formula (I);
##STR4## wherein R1, R2, R3 and R4 are each independently an alkyl moiety containing 1 to 14 carbon atoms.
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Abstract
Functional fluids such as metal working fluids are disclosed which include an oil of lubricating viscosity, a sulfurized organic compound, and an amine derivative. The amine derivative is a hindered imine which is the reaction product obtained from reacting a primary amine connected to a tertiary alkyl group with an aldehyde or aldehyde reaction synthon. The inclusion of the hindered imine within the metal working fluid suppresses the generation of hydrogen sulfide gases during the use of the fluid thus improving the environmental and safety characteristics of the fluid.
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Citations
17 Claims
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1. A functional fluid, comprising:
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(A) an oil of lubricating viscosity; (B) a sulfurized organic compound selected from the group consisting of fats, alpha-olefins, fatty acid esters and triglycerides; and (C) a hindered imine of general structural formula (I);
##STR4## wherein R1, R2, R3 and R4 are each independently an alkyl moiety containing 1 to 14 carbon atoms. - View Dependent Claims (2, 3, 4, 5)
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6. A metal working fluid, comprising:
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(A) an oil of lubricating viscosity; (B) a sulfurized organic compound selected from the group consisting of fats, fatty acid esters, alpha-olefins and triglycerides; and (C) a hindered imine produced by reacting a primary amine connected to a tertiary alkyl group of general formula (II);
##STR5## wherein R1, R2 and R3 are each independently an alkyl moiety containing 1 to about 14 carbon atoms, with an aldehyde or aldehyde reaction synthon. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A metal working fluid, comprising:
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(A) an oil of lubricating viscosity; (B) a sulfurized organic compound obtained by reacting an unsaturated aliphatic compound containing 12 to 28 carbon atoms with elemental sulfur in the presence of a catalyst selected from the group consisting of phosphoric acid and salts thereof; and (C) a hindered imine of the following general structural formula;
##STR6## wherein R1, R2, and R3 are each independently an alkyl moiety containing 1 to 9 carbon atoms. - View Dependent Claims (14, 15, 16, 17)
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Specification