Amino acid grafted polymer with soot handling properties
AssigneeAfton Chemical Corporation
InventorsSheng Jiang, Arturo Carranza
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Abstract
The present disclosure relates to lubricant additives such as dispersants and dispersant viscosity modifiers including acyl peptide grafted polymers and lubricating oil compositions comprising such additives. The disclosure also relates to the use of lubricant compositions comprising the additives herein for improving the soot or sludge handling characteristics of an engine lubricant composition and while minimizing the deterioration of engine's elastomer compatibility.
Claims28
A multi-functional olefin copolymer lubricant additive comprising a reaction product of an acylated olefin copolymer and an amino mono- or di-carboxylic acid, and wherein the amino mono- or di-carboxylic acid has the formula
- H2N—R1(R2)—COOH
- wherein
- R1 is a C1 to C18 hydrocarbyl group;
- R2 is hydrogen, a linear or branched alkyl group, an aryl group, a hydroxyphenyl group, a heterocyclic amino group, a carboxyl group, an amido group, an amino group, a hydroxyl group, a thiol, a thioester, selenium, or combinations thereof;
- and
- wherein the acylated olefin copolymer is derived from a copolymer of ethylene and one or more C3 to C18 alpha-olefins and a grafted ethylenically unsaturated carboxylic acid material selected from acrylic acid, methacrylate acid, cinnamic acid, crotonic acid, maleic acid, fumaric acid or anhydride derivatives thereof.
A lubricant composition comprising:
- a major amount of base oil of lubricating viscosity;
- and
- a multi-functional olefin copolymer viscosity modifier comprising a reaction product of an acylated olefin copolymer and an amino mono- or di-carboxylic acid, and wherein the amino mono- or di-carboxylic acid has the formula
- H2N—R1(R2)—COOH
- wherein
- R1 is a C1 to C18 hydrocarbyl group;
- R2 is hydrogen, a linear or branched alkyl group, an aryl group, a hydroxyphenyl group, a heterocyclic amino group, a carboxyl group, an amido group, an amino group, a hydroxyl group, a thiol, a thioester, selenium, or combinations thereof;
- and
- wherein the acylated olefin copolymer is derived from a copolymer of ethylene and one or more C3 to C18 alpha-olefins and a grafted ethylenically unsaturated carboxylic acid material selected from acrylic acid, methacrylate acid, cinnamic acid, crotonic acid, maleic acid, fumaric acid or anhydride derivatives thereof.
Dependencies are inferred from the claim text.