Continuous dilution of polyisocyanates

US11091431B2 · kind B2 · utility

Assignee

• Covestro Deutschland AG · DE

Inventors

• Stefan Groth · Leverkusen, DE
• Ruiwen Wu · Leverkusen, DE
• Antonio Midolo · Cologne, DE

Key dates

• Filing date: Jul 2, 2018
• Grant date: Aug 17, 2021
• Expiry date: Jul 2, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09J175/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for producing a polyisocyanate composition comprising addition of at least one isocyanate-inert solvent to at least one polyisocyanate, characterized in that the addition of the solvent is carried out in one or more stages and at least one of these stages is performed as a continuous dilution. The invention further relates to the polyisocyanate compositions obtainable by the process, to the use of the polyisocyanate compositions, to a two-component system containing the polyisocyanate composition and to composite systems produced with the two-component system.