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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.:

US 10731097 B1

PDFFull Text
Date of Patent:
Aug. 04, 2020

Filed:

Aug. 31, 2018

Viscosity index improvers with defined molecular weight distributions

Applicant:

Evonik Operations Gmbh, Essen, DE;

Inventors:

Katrin Schöller, Darmstadt, DE;

Sarah Lippert, Darmstadt, DE;

Wolfgang Tschepat, Darmstadt, DE;

Klaus Schimossek, Bensheim, DE;

Assignee:

Evonik Operations GmbH, Essen, DE;

Attorney:

Grüneberg and Myers PLLC

Primary Examiner:

James C Goloboy

Int. Cl.
CPC ...
C10M 145/14 (2006.01); C08F 290/04 (2006.01); C08C 19/28 (2006.01); C08F 220/18 (2006.01); C10N 20/02 (2006.01); C10N 20/04 (2006.01); C10N 30/02 (2006.01); C10N 30/00 (2006.01); C10N 40/25 (2006.01); C10N 70/00 (2006.01);
U.S. Cl.
CPC ...
C10M 145/14 (2013.01); C08C 19/28 (2013.01); C08F 220/18 (2013.01); C08F 290/048 (2013.01); C08F 220/1804 (2020.02); C08L 2203/40 (2013.01); C10M 2209/084 (2013.01); C10N 2020/02 (2013.01); C10N 2020/04 (2013.01); C10N 2030/02 (2013.01); C10N 2030/54 (2020.05); C10N 2030/68 (2020.05); C10N 2030/74 (2020.05); C10N 2040/25 (2013.01); C10N 2070/00 (2013.01);
Abstract

Polyalkyl(meth)acrylate based comb polymers with weight-average molecular weights of 700,000 g/mol or greater and number-average molecular weights of 130,000 g/mol or greater can be used to improve the high temperature-high shear performance of lubricant compositions, especially of engine oil (EO) compositions. These polymers can be obtained in a reaction mixture comprising monomers, a dilution oil, and an initiator. The resulting lubricant compositions can have improved kinematic viscosity and high temperature high shear performance.

Find Patent Forward Citations

Schöller, Katrin. (2020). Viscosity index improvers with defined molecular weight distributions (U.S. Patent No. 10731097). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10731097

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