Abstract: A method for producing a polyoxymethylene polyoxyalkylene copolymer, comprising reacting a polymer formaldehyde compound with an alkylene oxide in the presence of a double metal cyanide (DMC) catalyst, wherein the polymer formaldehyde compound comprises at least one terminal hydroxyl group and wherein the method comprises the steps of placing a suspending agent in a reactor and subsequently incrementally or continuously metering in the polymer formaldehyde compound into the reactor during the reaction is provided.
Type:
Grant
Filed:
December 14, 2020
Date of Patent:
June 9, 2026
Assignee:
Power2Polymers GmbH
Inventors:
Jens Langanke, Aurel Wolf, Christoph Guertler
Abstract: The present invention relates to isocyanate-terminated prepolymers based on polyoxymethylene-polyoxyalkylene block copolymers, to a process for their preparation, and to the use of these isocyanate-terminated prepolymers as isocyanate components in 1- and 2-component systems for coatings, adhesives and sealants.
Type:
Grant
Filed:
August 30, 2021
Date of Patent:
June 2, 2026
Assignee:
Power2Polymers GmbH
Inventors:
Anna-Marie Zorn, Christoph Thiebes, Beate Baumbach, Annika Hill, Michael Weinkraut, Mike Schuetze
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