Exxon Chemical Patents, Inc.

Exxon Chemical Products Inc.

Mark J Struglinski

David Y Chung

Antonio Gutierrez

John E Johnston

Lewis J Fetters

Gary W Ver Strate

Gary William VerStrate

Robert D Lundberg

Ricardo A Bloch

John B Gardiner

Roger K West

Paul Brice

Steven James Searis

The present invention relates to hydrogenated polybutadiene comprising monomeric units of 1,4-butadiene and 1,2-butadiene addition products. The copolymer is hydrogenated and comprises at least 10% by weight of at least one crystallizable segment and at least one low crystallinity segment.

Viscosity modifier polybutadiene polymers

The present invention relates to novel multifunctional viscosity modifiers comprising a mixture of derivatized ethylene-alpha olefin copolymers, A and B. Said A copolymer comprising from about 30 to about 60 weight percent monomer units derived from ethylene and said B copolymer comprising from about 60 to about 80 weight percent units derived from ethylene.

Mixed ethylene alpha olefin copolymer multifunctional viscosity

The present invention relates to hydrogenated block copolymers of butadiene and at least one other diene, preferably isoprene. The copolymer is hydrogenated and comprises at least 10% by weight of at least one crystallizable segment and at least one low crystallinity segment.

Viscosity modifier polymers

The present invention is directed to a lubricating oil composition exhibiting improved viscosity index comprising lubricating oil and a viscosity improving effective amount of ethylene alpha-olefin polymer comprising monomer units derived from ethylene and at least one alpha-olefin represented by the formula H.sub.2 C.dbd.CHR.sup.1 wherein R.sup.1 is an alkyl group of from 1 to 18 carbon atoms, wherein said polymer has a number average molecular weight of from above 25,000 to about 500,000, wherein an average of at least about 30 percent of the polymer chains contain terminal ethenylidene unsaturation, and wherein said polymer is prepared in the presence of a catalyst system comprising at least one metallocene and an alumoxane compound.

Oleaginous compositions containing novel ethylene alpha-olefin polymer

Degraded molecular weight copolymers of ethylene alpha-olefin are provided. The ethylene alpha-olefin copolymers, before degradation, are characterized by having a narrow molecular weight distribution and are comprised of intramolecularly heterogeneous and intermolecularly homogeneous copolymer chains. The degraded copolymers are useful as viscosity index improvers for oils.

Viscosity index improver

Composition of matter useful as multifunctional viscosity index improver for lubricating oil comprising reaction product of: (i) (a) molecular weight degraded ethylene-alpha-olefin copolymer obtained by degrading copolymer of ethylene and at least one other alpha-olefin monomer, said copolymer comprising intramolecularly heterogeneous copolymer chains containing at least one crystallizable segment of methylene units and at least one low crystallinity ethylene-alpha-olefin copolymer segment, wherein said copolymer has a molecular weight distribution characterized by at least one of a ratio of M.sub.w /M.sub.n of less than 2 and a ratio of M.sub.z /M.sub.w of less than 1.8, and said degraded copolymer grafted with (b) ethylenically monounsaturated carboxylic acid material having 1 to 2 carboxylic acid groups or anhydride group to form grafted ethylene copolymer; (ii) about C.sub.50 to about C.sub.400 hydrocarbyl substituted carboxylic acid component containing 1 to 2 carboxylic acid groups or anhydride group; (iii) thioamido-amine; and (iv) C.sub.12 to about C.sub.18 hydrocarbyl substituted dicarboxylic anhydride.

Multifunctional viscosity index improver derived from amido-amine and

A multifunctional viscosity index improver for lubricating oils comprising reaction product of:

Multifunctional viscosity index improver derived from polyamine

Viscosity modifer polymers

Composition of matter useful as multifunctional viscosity index improver for lubricating oil comprising reaction product of:

An oil soluble nitrogen containing grafted degraded ethylene copolymers useful as multifunctional viscosity index improvers or modifiers, such as VI improver-dispersant additives. The nitrogen containing grafted degraded ethylene copolymers are grafted with an ethylenically unsaturated carboxylic acid grafting material and the grafted degraded ethylene copolymers are then reacted with at least one polyamine containing one primary amine group and at least one or more secondary amine groups.

Multifunctional viscosity index improver additives for oleaginous composition comprising reaction products of (i)(a) ethylene-alpha-olefin copolymers grafted with (i)(b) carboxylic acid material, further reacted with (ii) at least one of polyamine, polyol, about C.sub.30 -C.sub.400 hydrocarbyl substituted carboxylic acid component together with polyol, or said carboxylic acid component together with polyamine, wherein the copolymer (i)(a) comprises intramolecularly heterogeneous copolymer chains containing at least one crystallizable segment of methylene units and at least one low crystallinity ethylene-alpha-olefin copolymer segment, and wherein said copolymer has a molecular weight distribution characterized by at least one of a ratio of M.sub.w /M.sub.n of less than 2 and a ratio of M.sub.n /M.sub.w of less than 1.8.

Multifunctional viscosity index improver exhibitng improved low

The present invention is directed to a viscosity index improver for lubricating oil compositions comprising the reaction product of A) a copolymer of ethylene and at least one other alpha-olefin monomer, said copolymer grafted with ethylenically monounsaturated carboxylic acid material and B) amido-amine or thioamido-amine comprising the reaction product of a polyamine and alpha, beta-unsaturated compound of the formula ##STR1## wherein X is oxygen or sulfur, Y is OR.sup.4, --SR.sup.4 or ##STR2## and R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are independently selected from hydrogen, hydrocarbyl and substituted hydrocarbyl.

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Bridgewater, NJ, United States of America

Mark J Struglinski