Preparation of low-odor-storage-stable monomer-containing polyisocyanurates based on isophorone diisocyante

US6703471B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Stephan Kohlstruk · Marl, DE
• Manfred Kreczinski · Herne, DE
• Rainer Lomölder · Munster, DE

Key dates

• Filing date: Jun 27, 2002
• Grant date: Mar 9, 2004
• Expiry date: Jun 27, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/1825
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Low-odor, storage-stable monomer-containing polyisocyanurate is prepared from isophorone diisocyanate by conducting a partial trimerization for 3 minutes to 3 hours in the presence of 0.05-2% by weight of a catalyst, based on the weight of the diisocyanate, the catalyst having the formula[R—NX3]m⊕mY⊖wherein Y⊖ is a carboxylic acid anion of 4-8 carbons, R is a &bgr;-hydroxyalkyl group of 2-6 carbons, X is an alkylene group of 2-3 carbons and m is a number from 1.0 to 2.0. The three radicals X form a ring with the quaternary nitrogen by way of a common nitrogen atom, which may be partly &bgr;-hydroxyalkylated, said ring optionally having an OH group positioned &agr;, &bgr; or &ggr; to the nitrogen. The reaction proceeds at a temperature of 0-160° C.