Process for preparing low-odor and storage-stable monomer-containing polyisocyanurates from isophorone diisocyanate

US6452003B1 · kind B1 · utility

Assignee

• Degussa AG · DE

Inventors

• Michael Ewald · Marl, DE
• Rainer Lomoelder · Munster, DE
• Stephan Kohlstruk · Marl, DE

Key dates

• Filing date: Jul 6, 2001
• Grant date: Sep 17, 2002
• Expiry date: Jul 6, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/2018
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention provides a process, which includes:partially trimerizing isophorone diisocyanate in the presence of a catalyst having the formula:[R—NX3]⊕Y⊖wherein R and X are butyl groups and Y− is CH3COO−; orwherein R is a benzyl group, Y− is a carboxylate anion having from 4 to 8 carbon atoms and each X is an alkylene group having from 2 to 3 carbon atoms, wherein the three alkylene groups share a common carbon atom and, together with the N atom in the formula, form a tricyclic structure, and wherein at least one alkyene group has at least one OH group in an &agr; or &bgr; &ggr; position relative to the N atom,to obtain a monomer-containing polyisocyanurate mixture. The present invention also provides a monomer-containing polyisocyanurate mixture made from the above process.