Catalyst for copolymerization of carbon dioxide and epoxy and method of manufacturing the same

US11965061B2 · kind B2 · utility

Assignee

• CHANGZHOU UNIVERSITY · CN

Inventors

• Qun Chen · Longbeilingcun, CN
• Mingyang He · Changzhou City, CN
• Junfeng Qian · Changzhou City, CN
• Shengchun Chen · Changzhou City, CN
• Zhonghua Sun · Beijing, CN
• Weiyou Zhou · Changzhou City, CN
• Zenan Ji · Changzhou City, CN

Key dates

• Filing date: Jul 28, 2022
• Grant date: Apr 23, 2024
• Expiry date: Jul 28, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2310/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A ternary composite catalyst of diethylzinc and yttrium trifluoroacetate loaded on chitin for copolymerization of carbon dioxide, epoxy cyclohexane and ethylene oxide is provided. The ternary composite catalyst exhibits strong catalytic activity for the ternary copolymerization of carbon dioxide, cyclohexane oxide and ethylene oxide. A high molecular weight and content of ester chain is maintained. Conventional rare earth ternary catalysts leave residues in the polymer, and the polymer requires rinsing with hydrochloric acid. The ternary composite catalyst can be removed through filtration. The average molecular weight of the resulting polycarbonate is more than 100,000, and the ester chain content is more than 90%. The resulting polymer has a lower metal content. The ternary composite catalyst can be used in agricultural film, disposable packaging and other polymer materials.