Dithiocarbonate containing polyols as polymer polyol stabilizers

US11149145B2 · kind B2 · utility

Assignees

• Covestro LLC · US
• Covestro Deutschland AG · DE

Inventors

• Rick L. Adkins · Schoutenkamp, US
• Jack R. Reese · Hurricane, US
• Thomas Ernst Müller · Aachen, DE
• Christoph Gürtler · Cologne, DE
• Urs Rauwald · Düsseldorf, DE
• Muhammad Afzal Subhani · Aachen, DE
• Verena Jakoby · Laufenbürg, DE
• Burkhard Kohler · Leverkusen, DE
• Walter Leitner · Aachen, DE

Key dates

• Filing date: Nov 19, 2019
• Grant date: Oct 19, 2021
• Expiry date: Apr 22, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L81/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

This invention relates to novel macromers containing dithiocarbonate (or xanthate) groups, novel preformed stabilizers comprising macromers, and novel polymer polyols comprising the novel macromers and/or novel preformed stabilizers. This invention also relates to processes for the preparation of these materials. Other aspects of this invention include foams comprising the novel polymer polyols and a process for preparing foam comprising the novel polymer polyols.