Exxon Research and Engineering Company

Exxon Chemical Patents, Inc.

Phillip W Brewster

Clinton R Smith

A Gordon Alexander

Esther D Winans

Rosemary O'Halloran

Terrance O Brown

James H Norton

Vijaya K Varma

Frederick W Gowland

William Nywening

A high dropping point lithium complex soap grease is prepared by dissolving a monocarboxylic fatty acid and a dicarboxylic acid together in oil at a temperature above the boiling point of water and then neutralizing the resulting oil-acid mixture by adding a concentrated aqueous solution of lithium hydroxide monohydrate.

Method of preparing high dropping point lithium complex soap greases

A method for manufacturing a lubricating grease having improved properties is described. The method comprises reacting a pyrrolidone with a fatty amine and subsequently adding a metal hydroxide to the reaction when the unreacted fatty amine content ranges between about 33 and about 66 wt. % of the fatty amine originally added. The grease thus formed will be a NLGI #0 grade grease that has the high temperature stay-in-place properties of a NGLI #2 grade grease.

Method of manufacturing an improved multi-grade lubricating grease

Solutions of ethylene-propylene copolymers grafted with vinyl containing monomers, maleic anhydride or ethylenically unsaturated acids including functionalized derivatives thereof, reacted with polyols, polyamines and hydroxamines, as well as hydrogenated butadiene or isoprene copolymers, which solutions have haze-forming tendencies in mineral oil and are generally useful as multifunctional lubricating oil additives, are reduced in haze-forming tendencies by treatment with 0.5 to 25 wt. % of an alkyl hydroxy benzene compound, such as nonyl or dodecyl phenol.

Haze-free polymer additives for fuels and lubricants

Hydrocarbon polymers such as ethylene copolymers may be reacted with unsaturated nitrogen-containing monomers or unsaturated carboxylic acids in a synthetic hydrocarbon lubricating oil in the presence of a free radical initiator such as a peroxide. The copolymer grafted directly with the nitrogen-containing monomers may be utilized as an additive for oil compositions, particularly lubricating oil compositions as a V.I.-dispersant additive. The polymer reacted with carboxylic acid may be further reacted with amines or amino-alcohols to also form a multifunctional V.I.-dispersant additive.

Multifunctional viscosity index improver

Lubricating oil compositions are disclosed exhibiting improved fuel economy which contain 0.05 to 0.2 wt. % of a glycerol partial ester of a C.sub.16 -C.sub.18 fatty acid as the fuel economy additive.

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Camlachie, Canada

Phillip W Brewster