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US 4,906,390 AGranted
Borated diol-phenol sulfide product and lubricant compositions containing same
AssigneeMobil Oil Corporation
InventorAndrew G. Horodysky
Life of this patent
Estimating the term…
Abstract
Reduction of friction between metal parts in contact, reductions in corrosion of copper and oxidation of lubricants are made possible by adding to lubricant or liquid fuel a minor amount of a product made by reacting a hydrocarbyl diol, a phenol sulfide and a boron compound.
Claims27
A product of the reaction made by reacting a hydrocarbyl diol of the formula
- R(OH).sub.2
- wherein R is a hydrocarbyl group containing from 8 to 30 carbon atoms, with a phenol sulfide of the formula ##STR3## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are hydrogen or the same or different hydrocarbyl groups containing from 1 to 20 carbon atoms, m and n are 1 to 4 and p is 0 to 4 with a boron compound capable of reacting with said hydrocarbyl diol and selected from the group consisting of metaborates, boric acid, and alkylborates of the formula
- (R.sup.6 O).sub.x B(OH).sub.y
- wherein R.sup.6 is a C.sub.1 to C.sub.6 alkyl group, x is 1 to 3 and y is 0 to 2, the sum of x and y being 3, the mole ratio of phenol to diol to boron compound ranging from about 1:1:1 to about 1:6:8, respectively, and at a pressure of about 1 to about 5 atmospheres and a temperature of about 80.degree. C. to about 260.degree. C.
1 more element
A lubricant composition comprising lubricant and a friction reducing amount of product of reaction made by reacting a hydrocarbyl diol of the formula
- R(OH).sub.2
- wherein R is a hydrocarbyl group containing from 8 to 30 carbon atoms, with a phenol sulfide of the formula ##STR4## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are hydrogen or the same or different hydrocarbyl groups containing from 1 to 20 carbon atoms, m and n are 1 to 4 and p is 0 to 4 with a boron compound capable of reacting with said hydrocarbyl diol and selected from the group consisting of metaborates, boric acid, and alkylborates of the formula
- (R.sup.6 O).sub.x B(OH).sub.y
- wherein R.sup.6 is a C.sub.1 to C.sub.6 alkyl group, x is 1 to 3 and y is 0 to 2, the sum of x and y being 3, the mole ratio of phenol to diol to boron compound ranging from about 1:1:1 to about 1:6:8, respectively, and at a pressure of about 1 to about 5 atmospheres and a temperature of about 80.degree. C. to about 260.degree. C.
1 more element
Dependencies are inferred from the claim text.