ASHLESS ADDITIVE COMPOSITION
This disclosure describes an ashless lubricant additive. The additive is a tertiary amine-containing compound having the following structure: where R 1 and R 2 are independently a linear or branched-chain monovalent hydrocarbyl group having two to about twenty carbon atoms, each m is independently from 0 to 2, each p is independently from 0 to 2, for each cyclic moiety m+p is from 2 to 4, and each n is independently from 1 to 6.
1 . An ashless additive composition comprising:
A tertiary amine-containing compound having the following structure:
wherein R 1 and R 2 are independently a linear or branched-chain monovalent hydrocarbyl group having two to about twenty carbon atoms, each m is independently from 0 to 4, each p is independently from 0 to 4, for each cyclic moiety m+p is from 2 to 4, and each n is independently from 1 to 6.
2 . The ashless additive composition of claim 1 , wherein the linear or branched-chain monovalent hydrocarbyl group is a branched C 12 to C 20 alkenyl group.
3 . The ashless additive composition of claim 1 , wherein the linear or branched-chain monovalent hydrocarbyl group is a branched C 18 to C 20 alkenyl group.
4 . A lubricating oil composition comprising:
a major amount of a base oil; and
an ashless tertiary amine-containing compound having the following structure:
wherein R 1 and R 2 are independently a linear or branched-chain monovalent hydrocarbyl group having two to about twenty carbon atoms, each m is from 0 to 4, each p is from 0 to 4, for each cyclic moiety m+p is from 2 to 4, and each n is independently from 1 to 6.
5 . The lubricating oil composition of claim 4 , wherein the linear or branched-chain monovalent hydrocarbyl group is a branched C 12 to C 20 alkenyl group.
6 . The lubricating oil composition of claim 4 , wherein the linear or branched-chain monovalent hydrocarbyl group is a branched C 18 to C 20 alkenyl group.
7 . The lubricating oil composition of claim 4 , wherein the tertiary amine-containing compound is present in about 0.1 to 2 wt % by weight of the lubricating oil composition.
8 . The lubricating oil composition of claim 4 , wherein the lubricating oil composition is a hydraulic fluid, a slide way lubricant, automatic transmission fluid, continuously variable transmission fluid, battery electric vehicle, hybrid electric vehicle transmission fluid, or gear oil.
9 . The lubricating oil composition of claim 4 , further comprising:
a friction modifier, ashless anti-wear additive, antioxidant, metal deactivator, seal swell additive, foam inhibitor, or viscosity modifier.
10 . An ashless additive composition comprising diamide product of a reaction comprising:
a hydrocarbyl-substituted succinic anhydride represented by the following structure:
wherein R 1 is a linear or branched-chain monovalent hydrocarbyl group having two to about twenty carbon atoms; and
a cyclic polyamine represented by the following structure:
wherein R 2 is a linear or branched-chain monovalent hydrocarbyl group having two to about twenty carbon atoms, m is from 0 to 4, p is from 0 to 4, m+p is from 2 to 4, and n is from 1 to 6; and
wherein the hydrocarbyl-substituted succinic anhydride to cyclic polyamine ratio is about 1.5:1 to about 1.6:1.
11 . The ashless additive composition of claim 10 , wherein the piperazine is aminoethyl piperazine, aminopropyl piperazine, aminobutyl piperazine, aminoethyl diazepane, or aminoethyl diazocane.
12 . A method for modifying friction in an engine, the method comprising lubricating said engine with a lubricating oil composition comprising:
a major amount of base oil of lubricating viscosity; and
an ashless additive composition having the following structure:
wherein R 1 and R 2 are independently a linear or branched-chain monovalent hydrocarbyl group having two to about twenty carbon atoms, each m is independently from 0 to 4, each p is independently from 0 to 4, for each cyclic moiety m+p is from 2 to 4, and each n is independently from 1 to 6.
13 . The method of claim 12 , wherein the linear or branched-chain monovalent hydrocarbyl group is a branched C 12 to C 20 alkenyl group.
14 . The method of claim 12 , wherein the linear or branched-chain monovalent hydrocarbyl group is a branched C 18 to C 20 alkenyl group.
15 . A method of boosting total base number in a lubricating oil, the method comprising blending base oil and an ashless additive composition having the following structure:
wherein R 1 and R 2 are independently a linear or branched-chain monovalent hydrocarbyl group having two to about twenty carbon atoms, each m is independently from 0 to 4, each p is independently from 0 to 4, for each cyclic moiety m+p is from 2 to 4, and each n is independently from 1 to 6.