Metal salts of mixed aromatic/aliphatic phosphorodithioic acids
AssigneeThe Lubrizol Corporation
InventorsRichard Yodice, Allan C. Clark
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Abstract
A mixture of metal salts of aromatic/aliphatic phosphorodithioic acids is disclosed. The metal salts, a mixture of the aromatic/aliphatic phosphorodithioic acids contain an aliphatic group and an aromatic group, optionally (H) aliphatic groups, and optionally (B) aromatic groups. The (B) aromatic component can be made utilizing phenol and/or mixtures of cresylic acids. The metal salts are oil-soluble and are useful as corrosion inhibitors and anti-wear agents, particularly in lubricating oil compositions.
Claims7
A lubricating composition, comprising a major amount of an oil of lubricating viscosity and a minor amount of a mixture of metal salts of phosphorodithioic acids prepared by the reaction of a metal or basic metal compound;
- a phosphorus sulfide;
- and
- (I) a mixture of low hydrocarbyl arene alcohols represented by the following formula (B):
- ##STR5## wherein (R) is a low hydrocarbyl group having from 1 to 4 carbon atoms and m is a number from 0-3 such that the low hydrocarbyl group (R) contains an overall average number of from 0.1 to about 3.5 carbon atoms in the mixture of low hydrocarbyl arene alcohols;
- and
- (II) at least one aliphatic alcohol (H) containing from 3 to about 22 carbon atoms;
- wherein the mixture of low hydrocarbyl arene alcohols is present in an amount of from about 50% to about 85% equivalents and the aliphatic alcohol (H) is present in an amount from about 15% to about 50% equivalents based on the total equivalents of (B) and (H).
A concentrate, comprising:
- a liquid organic diluent and from about 3 to about 90 percent by weight of a mixture of metal salts of phosphorodithioic acids prepared by the reaction of a metal or basic metal compound;
- a phosphorus sulfide;
- and
- (I) a mixture of low hydrocarbyl arene alcohols represented by the following formula (B):
- ##STR6## wherein (R) is a low hydrocarbyl group having from 1 to 4 carbon atoms and m is a number from 0-3 such that the low hydrocarbyl group (R) contains an overall average number of from 0.1 to about 3.5 carbon atoms in the mixture of low hydrocarbyl arene alcohols;
- and
- (II) at least one aliphatic alcohol (H) containing from 3 to about 22 carbon atoms;
- wherein the mixture of low hydrocarbyl arene alcohols is present in an amount of from about 50% to about 85% equivalents and the aliphatic alcohol (H) is present in an amount from about 15% to about 50% equivalents based on the total equivalents of (B) and (H).
Dependencies are inferred from the claim text.