Texaco Inc.

Carmen M Cusano

Roy I Yamamoto

Wheeler C Crawford

Abraham Morduchowitz

Ronald E Jones

James O Waldbillig

Theodore E Nalesnik

Isaac D Rubin

Joseph B Biasotti

Paul F Vartanian

Doris Love

Harold S Magaha

Frank J Gaetani

David D Reed

Richard L Winstead

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 having improved dispersancy and viton seal compatibility. The dispersant being prepared by coupling partially glycolated succinimides with an organic diacid.

Dibaisic acid lubricating oil dispersant and viton seal additives

A copolymer comprising the olefin polymerization product of:

Nitrogen containing polymers prepared from methacrylic esters as

A pour depressant polyalkylacrylate comprising an interpolymer of (A) C.sub.1 -C.sub.15 alkylacrylate and (B) C.sub.16 -C.sub.22 alkylacrylate, said interpolymer having an average molecular weight of between about 1000 and 25,000, an A:B weight ratio of between about 90:10 and 50:50, an average alkyl side chain length between about 11 and 16 carbons, and prepared under neat conditions; a lubricating oil composition thereof comprising a major amount of lubricating oil and between about 0.005 and 10 wt.% of the interpolymeric pour depressant and between about 0.5 and 30 wt.% of a viscosity index improving ethylene-propylene copolymer of a molecular weight between about 10,000 and 150,000, a propylene content of 20 to 70 mole% and polydispersity index of less than 5; and a method of improving component compatibility, pour depression, and viscosity index comprising admixing a major amount of hydrocarbon lubricating oil with a minor amount of the interpolymeric polyalkylacrylate and ethylene-propylene copolymer.

Lubricant compositions which exhibit low degree of haze and methods of

Disclosed are lubricating oil additives consisting of the reaction product of a di(lower)alkylamino-(lower)akylamine and a hydro-peroxidized ethylene/propylene copolymer having utility as dispersants and viscosity index improvers.

Lubricating oil additives and composition containing same

The color and viscosity stability of copolymeric .alpha.-olefin viscosity index improvers and of oils containing same are improved by the incorporation therein of minor amounts of N,N'-bis(2-hydroxy-5-alkylbenzyl).alpha.-.OMEGA.-diaminoethane wherein the alkyl group is a C.sub.4 to C.sub.30 alkyl group and the basic metal salts thereof.

Ethylene-hydrocarbon copolymeric viscosity improvers containing color

A fully formulated crankcase lubricating oil composition containing between about 0.1 and 10 wt. % of a tetrapolymer of 4-vinylpyridine (4-VP), a first alkyl methacrylate of the formula: ##STR1## a second alkyl methacrylate of the formula: ##STR2## and a third alkyl methacrylate of the formula: ##STR3## where R is alkyl of from 1 to 6 carbons, R.sup.1 is alkyl of from 10 to 15 carbons and R.sup.2 is alkyl of from 16 to 20 carbons, of a molecular weight between about 25,000 and 2,500,000 having a component ratio of 4-VP:C.sub.1 to C.sub.6 alkyl methacrylate:C.sub.10 -C.sub.15 alkyl methacrylate:C.sub.16 -C.sub.20 alkyl methacrylate of between about 2:10:78:10 and 10:30:30:30 and between about 0.1 and 5 wt. % of a calcium containing rust inhibitor, said composition having a sulfated metal ash content of between about 0.05 and 1 wt. %.

4-Vinylpyridine polymethacrylate containing lube oil compositions

A complex product of 1). an interpolymer of dialkylaminoalkyl methacrylate, C.sub.1 -C.sub.6 alkyl methacrylate, C.sub.10 -C.sub.14 alkyl methacrylate and C.sub.16 -C.sub.20 alkyl methacrylate monomers and 2). a liquid poly(alkene-1) of a molecular weight between about 200 and 10,000 prepared by polymerizing the monomers comprising said interpolymer in the presence of said liquid poly(alkene-1). A mineral oil composition of improved viscosity, pour depressing and detergent-dispersant properties and concentrates thereof comprising between about 10 and 95 wt. % of a mineral oil of a lubricating viscosity and between about 0.1 and 90 wt. % of said complex product.

Polymethacrylate additives and lube compositions thereof

A complex product of 1). an interpolymer of an N,N-dialkylaminoalkyl methacrylamide, C.sub.1 -C.sub.6 alkyl methacrylate, C.sub.10 -C.sub.14 alkyl methacrylate and C.sub.16 -C.sub.20 alkyl methacrylate monomers and 2). a liquid poly(alkene-1) of a molecular weight between about 200 and 10,000 prepared by polymerizing the monomers comprising said interpolymer in the presence of said liquid poly(alkene-1). A mineral oil composition of improved viscosity, pour depressing and detergent-dispersant properties and concentrates thereof comprising between about 10 and 95 wt. % mineral oil of a lubricating viscosity and between about 0.1 and 90 wt. % of said complex product.

Polymethacrylate additives and lubricating compositions thereof

A complex product of (1) an interpolymer of dialkylaminoalkyl methacrylate, C.sub.1 -C.sub.6 alkyl methacrylate, C.sub.10 -C.sub.14 alkyl methacrylate and C.sub.16 -C.sub.20 alkyl methacrylate monomers and (2) a liquid alkylbenzene of a molecular weight between about 100 and 5000, prepared by polymerizing the monomers comprising said interpolymer in the presence of said liquid alkylbenzene. A mineral oil composition of improved viscosity, pour depressing and detergent-dispersant properties and concentrates thereof comprising between about 10 and 95 wt. % of a mineral oil of lubricating viscosity and between about 0.1 and 90 wt. % of said complex product.

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Poughkeepsie, NY, United States of America

Carmen M Cusano