Secondary and Tertiary Amines as Friction Modifiers for Automatic Transmission Fluids
First Claim
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1. A composition suitable for lubricating a transmission, comprising:
- (a) a major amount of an oil of lubricating viscosity;
(b) a secondary or tertiary amine being represented by the formula
R1R2NR3 wherein R1 and R2 are each independently an alkyl group of at least 6 carbon atoms and R3 is a hydroxyl-containing alkyl group, a hydroxyl-containing alkoxyalkyl group, an amine-containing alkyl group, a hydrocarbyl group, or hydrogen, provided that when R3 is H, then at least one of R1 and R2 is an alkyl group of 8 to 16 carbon atoms; and
(c) a dispersant.
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Abstract
A composition of a major amount of an oil of lubricating viscosity; a secondary or tertiary amine being represented by the formula R1R2NR3 wherein R1 and R2 are alkyl groups of at least 6 carbon atoms and R3 is hydrogen, a hydrocarbyl group, a hydroxyl-containing alkyl group, or an amine-containing alkyl group; and a dispersant, provides high static coefficients of friction and a durable positive slope during oxidative and mechanical stressing, particularly as a friction component of an automatic transmission.
18 Citations
20 Claims
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1. A composition suitable for lubricating a transmission, comprising:
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(a) a major amount of an oil of lubricating viscosity;
(b) a secondary or tertiary amine being represented by the formula
R1R2NR3wherein R1 and R2 are each independently an alkyl group of at least 6 carbon atoms and R3 is a hydroxyl-containing alkyl group, a hydroxyl-containing alkoxyalkyl group, an amine-containing alkyl group, a hydrocarbyl group, or hydrogen, provided that when R3 is H, then at least one of R1 and R2 is an alkyl group of 8 to 16 carbon atoms; and
(c) a dispersant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 17, 18, 19, 20)
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15. A concentrate suitable for dilution with oil of lubricating viscosity to prepare a lubricant for a transmission, comprising:
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(a) a concentrate-forming amount of an oil of lubricating viscosity;
(b) a secondary or tertiary amine being represented by the formula
R1R2NR3wherein R1 and R2 are each independently an alkyl group of at least 6 carbon atoms and R3 is a hydroxyl-containing alkyl group, a hydroxyl-containing alkoxyalkyl group, an amine-containing alkyl group, a hydrocarbyl group, or hydrogen, provided that when R3 is H, then at least one of R1 and R2 is an alkyl group of 8 to 16 carbon atoms; and
(c) a dispersant.
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16. A method for lubricating a transmission, comprising supplying thereto a lubricant comprising:
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(a) a major amount of an oil of lubricating viscosity; and
(b) a secondary or tertiary amine being represented by the formula
R1R2NR3wherein R1 and R2 are each independently an alkyl group of at least 6 carbon atoms and R3 is a hydroxyl-containing alkyl group, a hydroxyl-containing alkoxyalkyl group, an amine-containing alkyl group, a hydrocarbyl group, or hydrogen, provided that when R3 is H, then at least one of R1 and R2 is an alkyl group of 8 to 16 carbon atoms.
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Specification