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. 29, 2022
Filed:
Apr. 15, 2020
Applicant:
Evonik Operations Gmbh, Essen, DE;
Inventors:
Assignee:
Evonik Operations GmbH, Essen, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08J 11/26 (2006.01);
U.S. Cl.
CPC ...
C08J 11/26 (2013.01); C08J 2383/04 (2013.01);
Abstract
A process for the recycling of silicones, especially silicone rubber and/or silicone oils, by the chemical transformation thereof to silanes and/or siloxanes having acetoxy groups is described, wherein silicone rubber and/or silicone oils are subjected to a heat treatment in digestion systems comprising acetic anhydride and/or acetoxysiloxane, and at least one Brønsted acid, with addition of acetic acid.