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:
Feb. 25, 2020
Filed:
Aug. 11, 2016
Evonik Operations Gmbh, Essen, DE;
Roland Wursche, Duelmen, DE;
Florian Schwager, Muenster, DE;
Franz Michlbauer, Kirchweidach, DE;
Helmut Hausner, Trostberg, DE;
Claudius Neumann, Rossdorf, DE;
Evonik Operations GmbH, Essen, DE;
Abstract
A process for producing cycloalkenamer-containing compositions involves converting at least one cycloalkene by ring-opening metathetic polymerization to obtain a polyalkenamer-containing product mixture. The product mixture is worked up to remove monomers and oligomers of the cycloalkenes to obtain the polyalkenamer-containing composition by extraction with CO. The extraction involves at least two stages: an extraction with liquid COunder the supercritical conditions, and then an extraction with supercritical CO. Such cycloalkenamer-containing compositions can be used, for example, in the field of packaging materials, especially for food and drink.