Hybrid electric transmission fluid
First Claim
1. A dispersant additive composition comprising a reaction product of (a) a hydrocarbyl substituted carboxylic acid or anhydride and (b) an amine, wherein the reaction product has a nitrogen content ranging from about 2400 ppm up to 10,000 ppm by weight, and a boron plus phosphorus to nitrogen ((B+P)/N) weight ratio of from 0:
- 1 to about 0.8;
1, and wherein the dispersant additive composition in combination with a metal detergent is effective to provide an electrical conductivity to a lubricant composition of from about 300 pS/m to less than 1700 pS/m.
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Accused Products
Abstract
A dispersant additive composition, a lubricant composition containing the dispersant additive, a transmission containing the dispersant additive, and a method of providing a versatile lubricating fluid. The dispersant includes a reaction product of a hydrocarbyl substituted carboxylic acid or anhydride and an amine. The reaction product has a nitrogen content up to 10,000 ppm by weight, and a boron plus phosphorus to nitrogen ((B+P)/N) weight ratio of from 0:1 to about 0.8:1. The dispersant additive composition is effective to provide an electrical conductivity to a lubricant composition containing the dispersant additive composition and a metal detergent of less than about 1700 pS/m.
60 Citations
24 Claims
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1. A dispersant additive composition comprising a reaction product of (a) a hydrocarbyl substituted carboxylic acid or anhydride and (b) an amine, wherein the reaction product has a nitrogen content ranging from about 2400 ppm up to 10,000 ppm by weight, and a boron plus phosphorus to nitrogen ((B+P)/N) weight ratio of from 0:
- 1 to about 0.8;
1, and wherein the dispersant additive composition in combination with a metal detergent is effective to provide an electrical conductivity to a lubricant composition of from about 300 pS/m to less than 1700 pS/m. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- 1 to about 0.8;
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9. A transmission comprising:
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an electric motor; a lubricating fluid; wherein said lubricating fluid is in contact with said electric motor; and wherein said lubricating fluid comprises; (1) an oil of lubricating viscosity; and (2) a dispersant additive composition comprising a reaction product of (a) a hydrocarbyl substituted carboxylic acid or anhydride and (b) an amine, wherein the reaction product has a nitrogen content ranging from about 2400 up to 10,000 ppm by weight, a boron plus phosphorus to nitrogen ((B+P)/N) weight ratio of from 0;
1 to about 0.8;
1, wherein the dispersant additive composition in combination with a metal detergent is effective to provide an electrical conductivity to a lubricant composition of from about 300 pS/m to less than 1700 pS/m. - View Dependent Claims (10, 11, 12, 13)
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14. A lubricating composition for a hybrid vehicle comprising:
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(1) a base oil of lubricating viscosity; (2) a dispersant additive derived from (a) a hydrocarbyl substituted carboxylic acid or anhydride and (b) an amine, wherein the dispersant additive has a nitrogen content ranging from about 2400 up to 10,000 ppm by weight, a boron plus phosphorus to nitrogen ((B+P)/N) weight ratio of from 0;
1 to about 0.8;
1; and(3) a metal-containing detergent, wherein the dispersant additive plus metal-containing detergent is effective to provide the lubricating composition with an electrical conductivity of from about 300 pS/m to less than 1700 pS/m. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method for providing a versatile lubricating fluid for lubricating a hybrid vehicle comprising:
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blending an oil of lubricating viscosity with a dispersant additive and a metal-containing detergent to provide a lubricant composition having an electrical conductivity of from about 300 pS/m to less than 1700 pS/m, wherein the dispersant additive has a nitrogen content ranging from 2400 up to 10,000 ppm by weight, and a boron plus phosphorus to nitrogen ((B+P)/N) weight ratio of from 0;
1 to about 0.8;
1. - View Dependent Claims (21, 22, 23, 24)
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Specification