Power transmission fluids with enhanced extreme pressure characteristics
First Claim
Patent Images
1. A power transmission fluid composition, comprising:
- (a) a base oil, and (b) an additive composition comprising an extreme pressure performance improving amount of an ester of phosphonic acid of the formula;
where R1 is a hydrocarbyl group containing from about 8 to about 24 carbon atoms, R2 and R3 are independently selected from hydrogen and a hydrocarbyl group containing from about 1 to about 8 carbon atoms, provided that no more than one of R2 and R3 is hydrogen, a succinimide dispersant, and, optionally, a metal-based detergent, wherein the detergent is substantially devoid of calcium cations.
3 Assignments
0 Petitions
Accused Products
Abstract
A power transmission fluid composition for extreme pressure applications. The power transmission fluid includes a base oil, and an additive composition containing an extreme pressure performance improving amount of an ester of phosphonic acid of the formula:
where R1 is a hydrocarbyl group containing from about 8 to about 24 carbon atoms, R2 and R3 are independently selected from hydrogen and a hydrocarbyl group containing from about 1 to about 8 carbon atoms, provided that no more than one of R2 and R3 is hydrogen, a succinimide dispersant, and, optionally, a metal-based detergent. The optional detergent is substantially devoid of calcium cations.
104 Citations
62 Claims
-
1. A power transmission fluid composition, comprising:
-
(a) a base oil, and (b) an additive composition comprising an extreme pressure performance improving amount of an ester of phosphonic acid of the formula;
where R1 is a hydrocarbyl group containing from about 8 to about 24 carbon atoms, R2 and R3 are independently selected from hydrogen and a hydrocarbyl group containing from about 1 to about 8 carbon atoms, provided that no more than one of R2 and R3 is hydrogen, a succinimide dispersant, and, optionally, a metal-based detergent, wherein the detergent is substantially devoid of calcium cations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
-
-
23. A method of improving extreme pressure characteristics for a transmission fluid comprising:
-
providing a base oil; and
adding to the base oil an additive composition comprising (1) from about 0.01 to about 1.0 weight percent based on a total weight of the base oil and additive composition of an ester of phosphonic acid of the formula;
where R1 is a hydrocarbyl group containing from about 8 to about 24 carbon atoms, R2 and R3 are independently selected from hydrogen and a hydrocarbyl group containing from about 1 to about 8 carbon atoms, provided that no more than one of R2 and R3 is hydrogen, (2) from about 2 to about 5 weight percent based on the total weight of the base oil and additive composition of a succinimide dispersant, and from about 0.0 to about 0.2 weight percent based on the total weight of the base oil and additive composition of a metal-based detergent, wherein the detergent is substantially devoid of calcium cations. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
-
-
42. An additive concentrate for a transmission fluid or gear lubricant, the additive concentrate comprising:
-
(a) a base oil carrier fluid, (b) an extreme pressure performance improving amount of an ester of phosphonic acid of the formula;
where R1 is a hydrocarbyl group containing from about 8 to about 24 carbon atoms, R2 and R3 are independently selected from hydrogen and a hydrocarbyl group containing from about 1 to about 8 carbon atoms, provided that no more than one of R2 and R3 is hydrogen, (c) a succinimide dispersant, and, optionally, (d) a metal-based detergent, wherein the detergent is substantially devoid of calcium cations. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62)
-
Specification