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US 4,784,780 AGranted
Lubricant additive comprising mixed hydroxyester or diol/phosphorodithioate-derived borates
AssigneeMobil Oil Corporation
InventorsLiehpao O. Farng, Andrew G. Horodysky
Life of this patent
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Abstract
Disclosed herein are the reaction products of dialkyl or diaryl phosphorodithioate acids and hydrocarbyl diols, hydroxyester or related polydiols and borating agent. These reaction products are useful as additives for lubricating compositions.
Claims40
The reaction product produced by:
- (a) reacting a phosphorodithioic acid and an epoxide, hydroxyester, or diol resulting in an intermediate product;
- and (b) reacting the intermediate product with a borating compound and a hydroxy-bearing compound to produce the desired reaction product, each reaction being conducted at a temperature between about 10.degree. C. and about 150.degree. C. for a period of between about 1 and about 48 hours in a proportion of reactants of about 1 mole of each.
The product produced by reacting:
- (a) a phosphorodithioic acid of the formula:
- (RO).sub.2 PSSH
- where R is a C.sub.3 to C.sub.30 hydrocarbyl or oxyhydrocarbylene group, or mixtures thereof with an epoxide of the formula:
- ##STR4## where R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are hydrogen or a C.sub.1 to C.sub.30 hydrocarbyl group optionally containing sulfur, nitrogen, or oxygen atoms, to obtain the intermediate product or mixture:
- ##STR5## where a is an integer from 1 to 10, (b) reacting the intermediate product from (a) with a borating compound and a hydroxy bearing compound of the formula:
- (HO).sub.x R.sup.5
- to produce the compound of the structural formula:
- ##STR6## where R.sup.5 is hydrogen or a C.sub.1 to C.sub.30 hydrocarbyl group and optionally contains ester, amide or oxygen, nitrogen and/or sulfur groups, x is 0 to 10, y and z are integers and y+z=3, each reaction being conducted at a temperature between about -10.degree. C. and about 250.degree. C. for a period of between about 1 and about 48 hours in a proportion of reactants of about 1 mole each.
5 more elements
A lubricant composition comprising a lubricant and between about 0.001% and about 10% by weight of the composition of an additive for increasing the resistance to oxidation of the lubricant and increasing its wear reducing characteristics said additive comprising the product produced by reacting:
- (a) a phosphorodithioic acid of the formula:
- (RO).sub.2 PSSH
- where R is a C.sub.3 to C.sub.30 hydrocarbyl or oxyhydrocarbylene, or mixtures thereof with an epoxide of the formula:
- ##STR7## where R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are hydrogen or C.sub.1 to C.sub.30 hydrocarbyl groups, to obtain the intermediate product:
- ##STR8## where a is an integer from 1 to 10, (b) reacting the intermediate product from (a) with a borating compound and a hydroxy-bearing compound of the formula:
- (HO).sub.x R.sup.5
- where R.sup.5 is hydrogen or C.sub.1 to C.sub.30 hydrocarbyl groupand optionally contains ester, amide, oxygen, nitrogen and/or sulfur groups, and x is 0 to 10 to produce the compound of the structural formula:
- ##STR9## where y and z are integers and z+z=3 each reaction being conducted at a temperature between about -10.degree. C. and about 250.degree. C. for a period of between about 1 and about 48 hours in a ratio of reactants of about 1 mole of each.
5 more elements
Dependencies are inferred from the claim text.