Novel carbamate additives for functional fluids
AssigneeThe Lubrizol Corporation
InventorWilliam C. Ward, Jr.
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Abstract
Novel molybdenum or tungsten thiocarbamate additives for functional fluids, e.g., lubricating oils, automatic transmission fluids (ATF), as well as fuel compositions, have been developed. The molybdenum or tungsten carbamate compositions, compounds, complexes and oligomers of the present invention are derived from at least one hydrocarbyl primary amine and impart improved anti-wear properties, anti-oxidant properties, extreme pressure properties and friction modifying properties in functional fluids for internal combustion engines.
Claims56
A composition comprising:
- ##STR7## wherein R.sub.1 and R.sub.2 are independently the same or different and are selected from H and hydrocarbyl with the proviso that at least one of R.sub.1 or R.sub.2 is H for at least one of the thiocarbamate groups, and at least one of R.sub.1 or R.sub.2 is hydrocarbyl for each of the thiocarbamate groups, M is Mo or W, X is O or S, b is at least 1, a is at least 1 depending on the oxidation state of M, c is at least 1 depending on the oxidation state of M and d is 0 or at least 1 depending on the oxidation state of M.
A compound of the formula:
- ##STR11## wherein R.sub.1 and R.sub.2 are independently the same or different and are selected from H and hydrocarbyl with the proviso that at least one of R.sub.1 and R.sub.2 is H for at least one of the thiocarbamate groups, and at least one of R.sub.1 and R.sub.2 is hydrocarbyl for each of the thiocarbamate groups, and M is Mo or W.
A compound of the formula:
- ##STR12## wherein R.sub.1 and R.sub.2 are independently the same or different and are selected from H and hydrocarbyl with the proviso that at least one of R.sub.1 or R.sub.2 is H for at least one of the thiocarbamate groups, and at least one of R.sub.1 or R.sub.2 is hydrocarbyl for each of the thiocarbamate groups, n is at least 2, X is 0 or S and M is Mo or W.
A complex comprising
- (A) a thiourea of the formula:
- ##STR14## wherein R.sub.3 and R.sub.6 are independently the same or different and are hydrogen or hydrocarbyl with the proviso that at least one of R.sub.3 or R.sub.6 is hydrogen and are independently the same or different and R.sub.4 and R.sub.5 are hydrocarbyl, R.sub.1 and R.sub.2 are independently the same or different and are selected from H and hydrocarbyl with the proviso that at least one of R.sub.1 or R.sub.2 is H for at least one of the thiocarbamate groups, and at least one of R.sub.1 or R.sub.2 is hydrocarbyl for each of the thiocarbamate groups, n is at least 2, x is 0 or S and M is Mo or W.
A composition useful as an additive for functional fluids derived from:
- (A) at least one hydrocarbyl primary amine reacted with a CS.sub.2 or COS source reagent, and
- (B) the product of (A) reacted with a molybdenum or tungsten-containing compound.
Dependencies are inferred from the claim text.