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:
Mar. 18, 2025
Filed:
Nov. 10, 2021
Applicant:
Evonik Operations Gmbh, Essen, DE;
Inventors:
Michael Ferenz, Essen, DE;
Michael Klostermann, Essen, DE;
Kai-Oliver Feldmann, Essen, DE;
Petra Schnell, Essen, DE;
Michelle Eckhoff, Essen, DE;
Assignee:
Evonik Operations GmbH, Essen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 77/46 (2006.01); C08G 77/08 (2006.01); C08G 77/12 (2006.01); C08G 101/00 (2006.01); C08J 9/00 (2006.01);
U.S. Cl.
CPC ...
C08G 77/46 (2013.01); C08G 77/08 (2013.01); C08G 77/12 (2013.01); C08J 9/0042 (2013.01); C08J 9/0061 (2013.01); C08G 2101/00 (2013.01); C08J 2375/04 (2013.01);
Abstract
A process for preparing polyether-siloxane block copolymers by hydrosilylation of alpha,omega-modified hydrosiloxanes with alpha,omega-modified di(meth)allyl polyethers in the presence of a hydrosilylation catalyst, wherein the reaction is performed in a solvent mixture comprising aromatic solvents, polyethers and alkoxylated alcohol, is described.