Process for producing polyisocyanurate plastics by means of phosphine catalysis

US11279790B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Dieter Mager · Leverkusen, DE
• Hans-Josef Laas · Odenthal, DE
• Mathias Matner · Neuss, DE
• Dirk Achten · Leverkusen, DE
• Heiko Hocke · Shanghai, CN

Key dates

• Filing date: Aug 29, 2017
• Grant date: Mar 22, 2022
• Expiry date: Feb 13, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2115/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to process for producing polyisocyanurate plastics, comprising the following steps: a) providing a polyisocyanate composition A) which comprises oligomeric polyisocyanates and is low in monomeric diisocyanates, “low in monomeric diisocyanates” meaning that the polyisocyanate composition A) has a content of monomeric diisocyanates of not more than 20% by weight, b) catalytically trimerizing the polyisocyanate composition A) using at least one tertiary organic phosphine catalyst B). The invention further relates to polyisocyanurate plastics obtainable by the process according to the invention, to coatings, films, semifinished products and mouldings comprising or consisting of the polyisocyanurate plastic according to the invention, and to the use of the polyisocyanurate plastics according to the invention for production of coatings, films, semifinished products and mouldings.