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. 12, 2019
Filed:
Jul. 13, 2018
Applicant:
Evonik Oil Additives Gmbh, Darmstadt, DE;
Inventors:
Rhishikesh Gokhale, Darmstadt, DE;
Sandra Gebhardt, 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 222/06 (2006.01); C08F 222/08 (2006.01); C08F 2/10 (2006.01); C08F 220/18 (2006.01); C10M 145/16 (2006.01); C10M 145/14 (2006.01); C08F 22/06 (2006.01);
U.S. Cl.
CPC ...
C08F 222/06 (2013.01); C08F 2/10 (2013.01); C08F 220/18 (2013.01); C08F 222/08 (2013.01); C08F 22/06 (2013.01); C10M 145/14 (2013.01); C10M 145/16 (2013.01);
Abstract
The present invention relates to a method for the preparation of a sulfur-free copolymer comprising at least one alkyl methacrylate and maleic anhydride having a number average molecular weight of 3000 to 9000 g/mol by solution polymerization in the presence of a radical initiator.