Preparation of low-odor storage-stable monomercontaining polyisocyanurates based on isophorone diisocyanate
CA 2392153 A1 · Owner: Kohlstruk, Stephan · Inventors: Lomolder, Rainer; Kreczinski, Manfred; Kohlstruk, Stephan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing low-odor storage-stable monomer-containing polyisocyanurates from isophorone diisocyanate, which comprises conducting the partial trimerization over from 3 minutes to 3 hours in the presence of 0.05-2% by weight, based on the weight of the diisocyanate, of a catalyst of the general formula (where Y.crclbar. is a carboxylic acid anion of 4-8 carbons and R is a .beta.-hydroxyalkyl group of 2-6 carbons and X is an alkylene group of 2-3 carbons, the three radicals X forming a tricyclic ring with the quaternary nitrogen by way of a common nitrogen atom, which may be partly .beta.-hydroxyalkylated the tricyclic ring optionally having an OH group in an .alpha. .beta. or …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed June 28, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 28, 2022.
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