Use of comb polymers for reducing fuel consumption

US9783630B2 · kind B2 · utility

Assignee

• Evonik Oil Additives GmbH · DE

Inventors

• Torsten Stoehr · Frankfurt, DE
• Dieter Janssen · Lippstadt, DE
• Juergen Schnabel · Leingarten, DE
• Boris Eisenberg · Heppenheim, DE
• Hans Goerlitzer · Dortmund, DE
• Michael Mueller · Bensheim, DE

Key dates

• Filing date: Apr 10, 2008
• Grant date: Oct 10, 2017
• Expiry date: Apr 10, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2030/54
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to the use of comb polymers comprising, in the main chain, repeat units which are derived from polyolefin-based macromonomers, and repeat units which are derived from low molecular weight monomers selected from the group consisting of styrene monomers having 8 to 17 carbon atoms, alkyl (meth)acrylates having 1 to 10 carbon atoms in the alcohol group, vinyl esters having 1 to 11 carbon atoms in the acyl group, vinyl ethers having 1 to 10 carbon atoms in the alcohol group, (di)alkyl fumarates having 1 to 10 carbon atoms in the alcohol group, (di)alkyl maleates having 1 to 10 carbon atoms in the alcohol group and mixtures of these monomers, where the molar degree of branching is in the range of 0.1 to 10 mol % and the comb polymer comprises a total of at least 80% by weight, based on the weight of the repeat units, of repeat units which are derived from polyolefin-based macromonomers and repeat units which are derived from low molecular weight monomers selected from the group consisting of styrene monomers having 8 to 17 carbon atoms, alkyl (meth)acrylates having 1 to 10 carbon atoms in the alcohol group, vinyl esters having 1 to 11 carbon atoms in the ac…