Process for preparing isocyanates containing alkoxysilane groups

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United States of America Patent

PATENT NO 10626131
APP PUB NO 20190300549A1
SERIAL NO

16354349

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Abstract

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The invention relates to a process for preparing isocyanate containing alkoxysilane groups, in which, in the sequence of steps A) to D),

    A) alkoxysilano(cyclo)alkylamine is reacted with dialkyl carbonate in the presence of a basic catalyst to give alkoxysilano(cyclo)alkylurethane,B) simultaneously or successively, the catalyst is removed and/or deactivated, and low boilers, solids, salt burdens and/or high boilers are removed,C) alkoxysilano(cyclo)alkylurethane obtained after B) is thermally cleaved to release isocyanate containing alkoxysilane groups and by-product, leaving bottoms material, andD) isocyanate containing alkoxysilane groups and by-product are separated from one another and from bottoms material and collected, wherein the basic catalyst is a guanidine base.

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Patent Owner(s)

Patent OwnerAddress
EVONIK OPERATIONS GMBHRELLINGHAUSER STRASSE 1-11 ESSEN 45128

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hoppe, Dirk Nottuln, DE 24 285
Kohlstruk, Stephan Gladbeck, DE 59 522
Kreczinski, Manfred Herne, DE 24 96
Spyrou, Emmanouil Schermbeck, DE 115 994

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