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US 2009/0156438 A1Published application
Engine Lubricant for Improved Fuel Economy
AssigneeThe Lubrizol Corporation
InventorsMohamed G. Fahmy, Daniel C. Visger, Barton J. Schober, Brent R. Dohner, Patrick E. Moster, Jody A. Kocsis, Isao Nakagawa
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Abstract
A lubricant composition comprising an oil of lubricating viscosity, an amino-functionalized acrylic or methacrylic-containing polymer, comprising about 2 percent to about 8 percent by weight of an amine moiety bearing a tertiary amino group, attached to said polymer through an ester, amide, or imide linkage; and a nitrogen-containing dispersant, provides reduced friction to an internal combustion engine and improved fuel economy.
Claims20
A composition suitable for lubricating an internal combustion engine, comprising:
- (a) an oil of lubricating viscosity
- (b) an amino-functionalized acrylic or methacrylic-containing polymer, comprising about 2 percent to about 8 percent by weight of an amine moiety bearing a tertiary amino group, attached to said polymer through an ester, amide, or imide linkage or a mixture of such linkages;
- and
- (c) a dispersant.
1 more element
Dependencies are inferred from the claim text.