Sk Innovation Co., Ltd.

Sujith S

Myungahn Ok

Jisu Jeong

Anish Cyriac

Jaeki Min

BunYeoul Lee

JongEon Seong

Bun Yeoul Lee

Eun Kyung Noh

Jae Ki Min

Provided are a complex prepared from ammonium salt-containing ligands and having such an equilibrium structural formula that the metal center takes a negative charge of 2 or higher, and a method for preparing polycarbonate via copolymerization of an epoxide compound and carbon dioxide using the complex as a catalyst. When the complex is used as a catalyst for copolymerizing an epoxide compound and carbon dioxide, it shows high activity and high selectivity and provides high-molecular weight polycarbonate, and thus easily applicable to commercial processes. In addition, after forming polycarbonate via carbon dioxide/epoxide copolymerization using the complex as a catalyst, the catalyst may be separately recovered from the copolymer.

Process of producing polycarbonate by copolymerization of carbon dioxide and epoxide using the same as catalyst

Coordination complexes for producing polycarbonate by copolymerization of carbon dioxide and epoxide using the same as catalyst

Coordination complexes and process of producing polycarbonate by copolymerization of carbon dioxide and epoxide using the same catalyst

Coordination complexes and process of producing polycarbonate by copolymerization of carbon dioxide and epoxide using the same as catalyst

The complex of the present invention containing an onium salt and a central Lewis acidic metal has a high catalytic activity at a high temperature for the copolymerization of an epoxide and carbon dioxide to produce a high molecular weight poly-carbonate.

Process for producing polycarbonates and a coordination complex used therefor

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Gyeonggi-do, South Korea

Sujith S