The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 2007
Filed:
Mar. 25, 2005
Young Whan Park, Daejeon, KR;
Hyo Sun Lee, Daejeon, KR;
Young Chul Won, Suwon, KR;
Bun Yeoul Lee, Suwon, KR;
Heon Yong Kwon, Kyungsangnam-do, KR;
Soo Yeon Lee, Wonju, KR;
Young Whan Park, Daejeon, KR;
Hyo Sun Lee, Daejeon, KR;
Young Chul Won, Suwon, KR;
Bun Yeoul Lee, Suwon, KR;
Heon Yong Kwon, Kyungsangnam-do, KR;
Soo Yeon Lee, Wonju, KR;
LG Chem Ltd., Seoul, KR;
Abstract
Provided are a bimetallic zinc complex and a method of producing polycarbonate, including polymerizing an epoxy compound and carbon dioxide using the bimetallic zinc complex. The bimetallic zinc complex according to the present invention has a distance between zinc-zinc atoms, which is maintained in a limited range regardless of its concentration in a reaction medium for the polymerization. Thus, the bimetallic zinc complex can have a polymerization activity even at a high ratio of monomer/catalyst, thereby reducing a catalyst amount to be used, which is economically advantageous. Further, the bimetallic zinc complex can produce a high molecular weight polycarbonate.