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:
Nov. 05, 2019
Filed:
Dec. 16, 2015
Applicant:
Evonik Oil Additives Gmbh, Darmstadt, DE;
Inventors:
Rhishikesh Gokhale, Darmstadt, DE;
Sandra Muehling, Otzberg, DE;
Miriam Kathrin Stihulka, Maintal, DE;
Klaus Schimossek, Bensheim, DE;
Frank-Olaf Maehling, Mannheim, DE;
Assignee:
Evonik Oil Additives GmbH, Darmstadt, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F 220/18 (2006.01); C08F 2/10 (2006.01); C08F 222/06 (2006.01); C10M 145/16 (2006.01); C10M 145/14 (2006.01);
U.S. Cl.
CPC ...
C08F 220/18 (2013.01); C08F 2/10 (2013.01); C08F 222/06 (2013.01); C10M 145/14 (2013.01); C10M 145/16 (2013.01);
Abstract
A method for the preparation of a sulfur-free copolymer proceeds by solution polymerization in the presence of a radical initiator, wherein the copolymer contains at least one alkyl methacrylate and maleic anhydride having a number average molecular weight of 3000 to 9000 g/mol.