Abstract: Compositions useful as multi-purpose lubricant and functional fluid additives and as thickeners and anti-sag additives for resins, paints and the like are prepared by free radical polymerization of at least one ethylenically unsaturated monomer in the presence of an oil-soluble dispersant. The carboxylic dispersants are preferred, especially esters of hydrocarbon-substituted succinic acids wherein the substituent contains at least about 30 carbon atoms and the reaction products of such acids or their derivatives with amines, usually polyalkylene polyamines.

Abstract: Compositions useful as multi-purpose lubricant and functional fluid additives and as thickeners and antisag additives for resins, paints and the like are prepared by free radical polymerization of at least one ethylenically unsaturated monomer in the presence of an oil-soluble dispersant. The carboxylic dispersants are preferred, especially esters of hydrocarbon-substituted succinic acids wherein the substituent contains at least about 30 carbon atoms and the reaction products of such acids or their derivatives with amines, usually polyalkylene polyamines.

Abstract: Compositions useful as multi-purpose lubricant and functional fluid additives and as thickeners and antisag additives for resins, paints and the like are prepared by free radical polymerization of at least one ethylenically unsaturated monomer in the presence of an oil-soluble dipersant. The carboxylic dispersants are preferred, especially esters of hydrocarbon-substituted succinic acids wherein the substituent contains at least about 30 carbon atoms and the reaction products of such acids or their derivatives with amines, usually polyalkylene polyamines.

Abstract: This invention is directed to a nitrogen-containing mixed ester of a carboxy-interpolymer having a reduced specific viscosity of from about 0.05 to 2.0. The carboxy-interpolymers, from which the mixed esters are obtained, are derived from at least one monomer selected from the class consisting of aliphatic olefins and styrene and at least one monomer comprising an unsaturated carboxylic acid, the anhydride or ester thereof. The nitrogen-containing mixed ester may be characterized as having in the polymeric structure carboxylic-ester groups derived from high molecular weight alcohols at least 7 aliphatic carbon atoms and low molecular weight alcohols having from 1 to 6 aliphatic carbon atoms and carbonyl-polyamino groups derived from hydrazine or a hydrocarbon-substituted hydrazine. The nitrogen-containing mixed esters are particularly useful either alone or in combination with other known additives in small but effective amounts in various oleaginous materials including lubricants and fuels.

Abstract: This invention is directed to a nitrogen-containing ester of a carboxy-interpolymer having a reduced specific viscosity ranging from about 0.05 to 2.0. The carboxy-interpolymers, from which the nitrogen-containing esters are obtained, are derived from at least one monomer selected from the class consisting of aliphatic olefins and styrene and at least one monomer comprising an unsaturated carboxylic acid, the anhydride or ester thereof. The nitrogen-containing ester may be characterized as having in the polymeric structure carboxylic-ester groups derived from a high molecular weight alcohol having at least 7 aliphatic carbon atoms and carbonyl-polyamino groups derived from hydrazine or a hydrocarbon-substituted hydrazine. The nitrogen-containing ester may be used alone or in combination with other additives in small but effective amounts in various oleaginous materials including lubricants and fuels.