Polyether-modified polyisocyanate composition

US11795262B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Hans-Josef Laas · Odenthal, DE
• Raul Pires · Cologne, DE
• Hao Liu · Beijing, CN
• Yaguang Ma · Shanghai, CN
• Jianping Shen · 安丰镇, CN
• Junchao Zheng · Shanghai, CN

Key dates

• Filing date: Jun 28, 2021
• Grant date: Oct 24, 2023
• Expiry date: Jun 28, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2190/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a polyether-modified polyisocyanate composition, which is obtainable by reacting a system containing the following components: a) a polyisocyanate having an isocyanate group functionality of 2-4.5; b) a polyoxyalkylene monoether alcohol; and c) optionally a catalyst; the polyoxyalkylene monoether alcohol has a number-average molecular weight of 900 g/mol-2000 g/mol and an oxypropylene group content of 45 wt. %-100 wt. %, relative to the total weight of the oxyalkylene group of the polyoxyalkylene monoether alcohol; the system has an equivalent ratio of isocyanate group to hydroxyl group of 5:1-110:1; the polyisocyanate composition has the following characteristics: i) the average isocyanate functionality is 1.8-4.1; ii) the isocyanate group content is 8-20 wt. %; and iii) the amount of the polyoxyalkylene monoether structure is greater than 10 wt. % and less than 50 wt. %, for characteristics ii) and iii), relative to the total weight of the polyisocyanate composition.