Friction reducing and corrosion inhibiting lubricant additives and their compositions
AssigneeMobil Oil Corporation
InventorsAndrew G. Horodysky, Phillip S. Landis, Robert M. Gemmill, Jr.
Life of this patent
Estimating the term…
Abstract
Dimercaptothiadiazole adducts of hydroxyl-containing unsaturated compounds and their borated analogues provide effective multifunctional friction reducing and corrosion inhibiting properties to various lubricating fluids when incorporated therein.
Claims19
A product of reaction obtained by reacting a hydroxyl-containing unsaturated compound or a borated derivative thereof, the borated derivative being prepared at a temperature of from about 75.degree. C. to about 270.degree. C. using up to stoichiometric amounts of unsaturated compound and boron compound with a mercaptothiadiazole, at a temperature of from about 140.degree. C. to about 200.degree. C. using a ratio of unsaturated compound or borated derivative to mercaptothiadiazole of less than 1:1 to more than 2:1, and wherein said unsaturated compound has the formula ##STR6## wherein R and R' are the same or different and are hydrogen, a straight chain alkyl, a branched chain alkyl, alkenyl, cycloalkyl, cycloalkenyl, alkyryl, aryl or alkaryl and contain from 1 to 30 carbon atoms, R" is a hydrocarbyl group containing from 1 to 15 carbon atoms and x is zero or 1.
A lubricant composition containing a major portion of a lubricating oil or a grease prepared therefrom and a minor friction reducing or corrosion inhibiting amount of a product of reaction obtained by reacting a hydroxyl-containing unsaturated compound or a borated derivative thereof, the borated derivative being prepared at a temperature of from about 75.degree. C. to about 270.degree. C. using up to stoichiometric amounts of unsaturated compound and boron compound with a mercaptothiadiazole, at a temperature of from about 140.degree. C. to about 200.degree. C. using a ratio of unsaturated compound or borated derivative to mercaptothiadiazole of less than 1:1 to more than 2:1, and wherein said unsaturated compound has the formula ##STR8## wherein R and R' are the same or different and are hydrogen, a straight chain alkyl, a branched chain alkyl, alkenyl, cycloalkyl, cycloalkenyl, alkyryl, aryl or alkaryl and contain from 1 to 30 carbon atoms, R" is a hydrocarbyl group containing from 1 to 15 carbon atoms and x is zero or 1.
A method of reducing friction in an internal combustion engine by treating the moving parts of said engine with a lubricating oil or a grease prepared therefrom containing a minor effective amount of a friction reducing or corrosion inhibiting product obtained by reacting a hydroxyl-containing unsaturated compound or a borated derivative thereof, the borated derivative being prepared at a temperature of from about 75.degree. C. to about 270.degree. C. using up to stoichiometric amounts of unsaturated compound and boron compound with a mercaptothiadiazole, at a temperature of from about 140.degree. C. to about 200.degree. C. using a ratio of unsaturated compound or borated derivative to mercaptothiadiazole of less than 1:1 to more than 2:1, and wherein said unsaturated compound has the formula ##STR10## wherein R and R' are the same or different and are hydrogen, a straight chain alkyl, a branched chain alkyl, alkenyl, cycloalkyl, cycloalkenyl, alkyryl, aryl or alkaryl and contain from 1 to 30 carbon atoms, R" is hydrocarbyl group containing from 1 to 15 carbon atoms and x is zero or 1.
Dependencies are inferred from the claim text.