Exxon Chemical Patents, Inc.

Infineum International Limited

John V Redpath

David J Martella

Arunas T Lapinas

Ricardo A Bloch

Albert Rossi

William M Davis

Ronald P Wangner

Steven W McKeown

James M Gardiner

Steven P Winston

Ariel Alvarino

Process for the copolymerization of free radical polymerizable comonomers such as vinyl acetate with an unsaturated diester such as diakyl fumarate which is carried out in the presence of water to produce copolymers such as fumarate vinyl acetate copolymers useful as lubricating oil and fuel oil additives, for example, as wax crystal modifiers and flow improvers.

Process for producing free radical polymerized copolymers

A lubricant which comprises: a mineral oil basestock which has been dewaxed via catalytic cracking and/or catalytic isomerization; an alkylene-alkylene copolymer; and a lubricating oil flow improver formed from the reaction product of: (a) an unsaturated carboxy ester formed via the esterification of an unsaturated carboxylic acid or its corresponding anhydride with a monohydric aliphatic alcohol having an average carbon number of between about 10 to 18, the unsaturated carboxy ester having the formula: ##STR1## wherein R' is selected from the group consisting of hydrogen and COOR and wherein R is a C.sub.6 to C.sub.22 alkyl group; and (b) a monomer selected from the group consisting of

Lubricant with a higher molecular weight copolymer lube oil flow improver

A low sediment process for forming a borated, oil soluble, polymer-substituted, nitrogen- or ester-containing lubricating oil additive. A polymer-substituted, nitrogen- or ester-containing additive in the presence of a solvent therefor, is contacted under boronating reaction conditions in a reaction zone with particulate boric acid. The boric acid has a particle size distribution in lubricating oil characterized by a .phi. value of not greater than about 450. The .phi. value is the ratio of said particles' total spherical volume divided by said particles' total spherical external surface area; i.e., ##EQU1## wherein, for each of a plurality of distribution segments defining a particle size range; d.sub.i is the average particle diameter for the ith distribution segment; N.sub.i is the particle volume percent of the ith distribution segment; and the sum is taken over all the distribution segments.

Low sediment process for forming borated dispersant

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North Brunswick, NJ, United States of America

John V Redpath