Texaco Inc.

Harold S Magaha

Thomas J Karol

Raymond C Schlicht

Joseph B Biasotti

Carmen M Cusano

Doris Love

A process for preparing a zinc dialkyldithiophosphate which comprises reacting phosphorus pentasulfide with an aliphatic monohydric alcohol in the presence of a hydrocarbyl polyol followed by a reaction with a basic zinc salt to produce a stabilized zinc dialkyldithiophosphate is provided.

Process for the preparation of zinc dialkyldithiophosphate

A lubricating oil composition containing a product prepared by reacting a natural oil with a (C.sub.2 -C.sub.10) hydroxy acid and a polyamine whereby the lubricating oil is improved in anti-friction and other properties.

Anti-friction additives for lubricating oils

Lubricating oils of improved wear resistance and dispersancy are prepared containing borate esters of hydrocarbyl-substituted mono- and bis-succinimides containing polyamine chain linked hydroxyacyl groups.

Borate esters of hydrocarbyl-substituted mono- and bis-succinimides

A hydrocarbyl-substituted mono- and bis-succinimide having polyamine chain linked hydroxyacyl radicals represented by the formula: ##STR1## in which R is a hydrocarbyl radical having from about 8 to 400 carbon atoms, X is a divalent alkylene or secondary hydroxy-substituted alkylene radical having from 2 to 3 carbon atoms, A is hydrogen or a hydroxyacyl radical from the group consisting of glycolyl, lactyl, 2-hydroxymethyl propionyl and 2,2'-bis-hydroxymethyl propionyl radicals and in which at least 30 percent of said radicals represented by A are said hydroxyacyl radicals, x is a number from 1 to 6, and R' is a radical selected from the group consisting of --NH.sub.2, --NHA, or a hydrocarbyl substituted succinyl radical having the formula: ##STR2## in which R and A have the values noted above, and a hydrocarbon oil composition containing same are provided.

Growing community of inventors

Saint Peters, MO, United States of America

Harold S Magaha