PROCESS FOR PREPARING POLYISOCYANATES AND CATALYST KIT THEREFOR
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United States of America Patent
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Feb 18, 2016
app pub date -
Mar 21, 2014
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Mar 22, 2013
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Abstract
The application relates to a catalyst kit comprising a trimerisation catalyst for the asymmetric trimerisation of polyisocyanates and a catalyst poison for the trimerisation catalyst, which is characterised in that the trimerisation catalyst and the catalyst poison each have a water content of at most 0.5 wt %. The application furthermore relates to the use of the catalyst kit for the preparation of polyisocyanates containing iminooxadiazinedione groups by oligomerisation of monomeric di- and/or triisocyanates and a process for the preparation of polyisocyanates containing iminooxadiazinedione groups.
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