The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 16, 2021
Filed:
Dec. 12, 2018
Applicant:
Evonik Operations Gmbh, Essen, DE;
Inventors:
Rebecca Klein, Frankfurt am Main, DE;
Holger Becker, Darmstadt, DE;
Dieter Janβen, Groβ-Umstadt, DE;
Sebastian Seibel, Darmstadt, DE;
Assignee:
Evonik Operations GmbH, Essen, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C10M 145/14 (2006.01); C08F 220/18 (2006.01); C08F 212/08 (2006.01); C10M 169/04 (2006.01); C08F 290/04 (2006.01); C10N 20/02 (2006.01); C10N 20/04 (2006.01); C10N 20/00 (2006.01); C10N 30/02 (2006.01); C10N 30/08 (2006.01); C10N 30/00 (2006.01); C10N 40/04 (2006.01);
U.S. Cl.
CPC ...
C10M 145/14 (2013.01); C08F 212/08 (2013.01); C08F 220/18 (2013.01); C08F 290/048 (2013.01); C10M 169/041 (2013.01); C08F 220/1804 (2020.02); C08F 2800/20 (2013.01); C10M 2203/003 (2013.01); C10M 2203/1025 (2013.01); C10M 2205/0285 (2013.01); C10M 2209/084 (2013.01); C10N 2020/019 (2020.05); C10N 2020/02 (2013.01); C10N 2020/04 (2013.01); C10N 2020/065 (2020.05); C10N 2020/071 (2020.05); C10N 2030/02 (2013.01); C10N 2030/08 (2013.01); C10N 2030/68 (2020.05); C10N 2040/04 (2013.01);
Abstract
The invention relates to a poly alkyl(meth)acrylate polymer comprising a combination of polybutadiene-based monomers having different average molecular weight, lubricant compositions comprising the polymer, a method for manufacturing the polymer and the use of the polymer as a viscosity index improver in a lubricating oil composition.