Polyisocyanurate polymers and process for the production of polyisocyanurate polymers

US11390707B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

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

Key dates

• Filing date: Jun 18, 2018
• Grant date: Jul 19, 2022
• Expiry date: Oct 1, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D251/34
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to novel polyisocyanurate plastics which are obtainable by catalytic trimerization of a polyisocyanate composition A) which contains oligomeric polyisocyanates and is low in monomeric diisocyanates. “Low in monomeric diisocyanates” means that the polyisocyanate composition A) has a content of monomeric diisocyanates of at most 20% by weight. The invention further relates to the use of these polyisocyanurate plastics for production of coatings, films, semi-finished products and mouldings, and to a process for producing polyisocyanurate plastics comprising the following steps: (a) providing a polyisocyanate composition A) which contains 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 at most 20% by weight; (b) catalytically trimerizing the polyisocyanate composition A).