Polyethercarbonate-polyoxymethylene block copolymers

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United States of America Patent

PATENT NO 9790328
SERIAL NO

14895535

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Abstract

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The present invention relates to a method for producing polyethercarbonate-polyoxymethylene block copolymers, comprising the step of polymerizing formaldehyde, wherein formaldehyde is polymerized in the presence of a polyethercarbonate having at least one Zerewitinoff-active H atom, obtaining an intermediate product. The obtained intermediate product can be further reacted with a cyclic carboxylic acid ester or carbonic acid ester, a cyclic anhydride, an epoxide, and/or an isocyanate, wherein a hydroxyl- or carboxy-functional or NCO-modified polyethercarbonate-polyoxymethylene block copolymer is obtained. The present invention further relates to polyethercarbonate-polyoxymethylene block copolymers that can be obtained by means of such a method and to the use of same to produce polyurethane polymers.

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Patent Owner(s)

Patent OwnerAddress
COVESTRO DEUTSCHLAND AGLEVERKUSEN GERMANY LEVERKUSEN NORTH RHINE-WESTPHALIA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Barath, Gabor Garching, DE 4 13
Guertler, Christoph Cologne, DE 44 24
Krautschick, Mario Huckelhoven, DE 2 6
Leitner, Walter Aachen, DE 78 165
Mueller, Thomas Ernst Aachen, DE 12 17
Vogt, Henning Aachen, DE 18 75

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