Polyurethanes made using zinc catalysts

US9156935B2 · kind B2 · utility

Assignee

• DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

• Richard Keaton · Pearland, US
• Peter M. Margl · Midland, US
• Duane R. Romer · Midland, US
• Nathan Wilmot · Flint, US
• Rajat Duggal · Pearland, US
• Rashmi Chamsarkar · Thane, IN

Key dates

• Filing date: Jul 5, 2011
• Grant date: Oct 13, 2015
• Expiry date: Mar 6, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/52
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyisocyanate-based polymers are formed by curing a reaction mixture containing at least one polyisocyanate and at least one isocyanate-reactive compound having at least two isocyanate-reactive groups in the presence of a zinc catalyst that contains at least one zinc atom associated with a polydentate ligand that contains at least one nitrogen-containing complexing site.