Copolymerization of propylene oxide and carbon dioxide without production of propylene carbonate

US9683077B2 · kind B2 · utility

Assignee

• Cornell Research Foundation, Inc. · US

Inventors

• Geoffrey W. Coates · Lansing, US
• Stephen Lee · San Jose, US
• Zengquan Qin · Copley, US
• Nicholas J. Robertson · Ithaca, US

Key dates

• Filing date: Mar 26, 2015
• Grant date: Jun 20, 2017
• Expiry date: Mar 26, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/2663
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Copolymers of propylene oxide and carbon dioxide and homopolymers of propylene oxide are made using two dimensional double metal cyanide complexes having the formula Co[M(CN)4] or hydrated or partially dehydrated form thereof. There is no propylene carbonate by product in the copolymerization.