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US 5,843,873 AGranted
Lubricants and fluids containing thiocarbamates and phosphorus
AssigneeThe Lubrizol Corporation
InventorsBetsy J. Butke, Craig D. Tipton, Reed H. Walsh
Life of this patent
Estimating the term…
Abstract
Lubricants containing a compound of the structure R.sub.1 R.sub.2 N--C(X')S--(CR.sub.3 R.sub.4).sub.a Y where X' is an oxygen or sulfur atom and Y is, e.g., an activating group; also containing a phosphorus acid or ester of the formula (R.sub.6 X)(R.sub.7 X)P(X).sub.n X.sub.m R.sub.8 or an amine salt thereof; and also a surfactant, exhibit good antiwear properties. They are particularly useful in pressure transmitting applications such as tractor hydraulic fluids.
Claims47
A lubricating oil composition comprising:
- (a) an oil of lubricating viscosity;
- (b) about 0.1 to about 10 percent by weight of a compound of the structure
- R.sub.1 R.sub.2 N--C(X')S--(CR.sub.3 R.sub.4).sub.a Y
- where R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are independently hydrogen or hydrocarbyl groups;
- X' is an oxygen or sulfur atom;
- a is 1 or 2;
- and Y is a group which will activate an olefin to which it is attached toward nucleophilic addition, selected from the group consisting of ester groups, acid groups, salt groups, amide groups, ether groups, aldehyde groups, ketone groups, cyano groups, and aryl groups;
- groups R.sub.1, R.sub.2, and (R.sub.3 R.sub.4).sub.a Y containing in total at least 4 carbon atoms;
- (c) about 0.05 to about 8 percent by weight of a phosphorus acid or ester of the formula (R.sub.6 X)(R.sub.7 X)P(X).sub.n X.sub.m R.sub.8 or an amine salt thereof, where each X is independently an oxygen atom or a sulfur atom, n is 0 or 1, m is 0 or 1, n+m is 1 or 2, and R.sub.6, R.sub.7, R.sub.8 are hydrogen or hydrocarbyl groups;
- and
- (d) 0.5 to about 8 percent by weight of a surfactant selected from the group consisting of:
- glycerol partial esters;
- sulfurized mixtures of glycerol monooleate, C.sub.16-18 olefins and oleic acid;
- 1-hydroxyethyl-2-heptadecenyl imidazoline;
- lecithin;
- borated lecithin;
- and borated C.sub.16 .alpha.-olefin epoxide.
14 more elements
A lubricating oil composition comprising:
- (a) an oil of lubricating viscosity;
- (b) about 0.1 to about 10 percent by weight of a compound of the structure
- R.sub.1 R.sub.2 N--C(S)S--CR.sub.3 R.sub.4 CR.sub.3 HC(O)OR.sub.5
- where R.sub.1 and R.sub.2 are independently C.sub.1 to C.sub.8 alkyl groups, R.sub.3 and R.sub.4 are independently hydrogen, methyl, or ethyl groups, and R.sub.5 is a C.sub.1 to C.sub.6 alkyl group;
- (c) about 0.05 to about 8 percent by weight of a phosphorus acid or ester of the formula (R.sub.6 X)(R.sub.7 X)P(X).sub.n X.sub.m R.sub.8 or an amine salt thereof, where each X is independently an oxygen atom or a sulfur atom, n is 0 or 1, m is 0 or 1, n+m is 1 or 2, and R.sub.6, R.sub.7, and R.sub.8 are hydrogen or hydrocarbyl groups;
- and
- (d) 0.5 to about 8 percent by weight of a surfactant selected from the group consisting of:
- glycerol partial esters;
- sulfurized mixtures of glycerol monooleate, C.sub.16-18 olefins and oleic acid;
- 1-hydroxyethyl-2-heptadecenyl imidazoline;
- lecithin;
- borated lecithin;
- and borated C.sub.16 .alpha.-olefin epoxide.
10 more elements
A lubricating oil composition comprising:
- (a) an oil of lubricating viscosity;
- (b) about 0.1 to about 10 percent by weight of a compound of the structure
- R.sub.1 R.sub.2 N--C(S)S--CH.sub.2 CH.sub.2 C(O)OCH.sub.3
- where R.sub.1 and R.sub.2 are independently C.sub.1 to C.sub.8 alkyl groups;
- (c) about 0.05 to about 8 percent by weight of a phosphorus acid or ester of the formula (R.sub.6 O)(R.sub.7 O)P(X).sub.n X.sub.m R.sub.8 or an amine salt thereof, where each X is independently an oxygen atom or a sulfur atom, n is 0 or 1, m is 0 or 1, n+m is 1 or 2, and R.sub.6, R.sub.7, and R.sub.8 are hydrogen or hydrocarbyl groups;
- and
- (d) 0.5 to about 8 percent by weight of a glycerol partial ester surfactant .
4 more elements
Dependencies are inferred from the claim text.