Patent ID: 6051537
Filing Date: 2000-04-18
Classification: C08F,C10L,C10M,C10N

Abstract:
An oil soluble dispersant mixture useful as an oil additive comprising:(A) from about 10 to 90 weight percent of a first dispersant comprising (a) a first hydrocarbyl substituted monocarboxylic acid producing material formed by reacting a first olefin polymer of C.sub.2 to C.sub.10 monoolefin having a number average molecular weight of about 1500 to 5,000 and a first monounsaturated mono acid material selected from the group consisting of acrylic acid, methacrylic acid, crotonic acid, and cinnamic acid, said first acid producing material having an average of 1.05 to 1.25 monocarboxylic acid producing moieties, per molecule of said first olefin polymer present in the reaction mixture used to form said first acid producing material, and (b) a first nucleophilic reactant selected from the group consisting of amines, alcohols, amino-alcohols and mixtures thereof; and(B) from about 90 to 10 weight percent of a second dispersant comprising (a) a second hydrocarbyl substituted monocarboxylic acid producing material formed by reacting a second olefin polymer of C.sub.2 to C.sub.10 monoolefin having a number average molecular weight of about 700 to 1150 and a second monounsaturated mono acid material selected from the group consisting of acrylic acid, methacrylic acid, crotonic acid, and cinnamic acid, said second acid producing material having an average of 1.2 to 2.0 monocarboxylic acid producing moieties, per molecule of said second olefin polymer present in the reaction mixture used to form said second acid producing material; and (b) a second nucleophilic reactant selected from the group consisting of amines, alcohols, amino-alcohols and mixtures thereof.