Blocked polyisocyanate composition based on pentamethylene 1,5-diisocyanate

US11091584B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Andreas Hecking · Langenfeld, DE
• Florian Stempfle · Cologne, DE
• Christoph Eggert
• Michael Grahl · Leverkusen, DE
• Dorota Greszta-Franz · Erkrath, DE

Key dates

• Filing date: Jul 20, 2016
• Grant date: Aug 17, 2021
• Expiry date: Jul 20, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D175/06
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a polyisocyanate composition comprising a formation component having isocyanate groups, the isocyanate groups having been reacted to an extent of ≥98% with at least one CH-acidic compound, characterized in that the formation component consists to an extent of ≥51% by weight of at least one polyisocyanate based on pentamethylene 1,5-diisocyanate having a content of isocyanurate trimer of ≤60 area %, based on the total weight of the polyisocyanates based on pentamethylene 1,5-diisocyanate, and the remaining proportion up to 100% by weight of the total amount of polyisocyanates present in the formation component consists of at least one aliphatic or cycloaliphatic polyisocyanate. The present invention further provides a one-component system comprising the polyisocyanate composition, a process for producing a coating on a substrate, and the coatings obtainable from the one-component system.