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:
Mar. 24, 2015
Filed:
Jun. 17, 2010
Jisu Jeong, Daejeon, KR;
Sujith Sudevan, Daejeon, KR;
Myungahn OK, Daejeon, KR;
Jieun Yoo, Daejeon, KR;
Bunyeoul Lee, Suwon-si, KR;
Sungjae NA, Suwon-si, KR;
Jisu Jeong, Daejeon, KR;
Sujith Sudevan, Daejeon, KR;
Myungahn Ok, Daejeon, KR;
Jieun Yoo, Daejeon, KR;
BunYeoul Lee, Suwon-si, KR;
SungJae Na, Suwon-si, KR;
SK Innovation Co., Ltd., Seoul, KR;
Abstract
The present invention related to a method of manufacturing a polycarbonate including the process of copolymerizing epoxide compound and CO2 using cobalt(III) or chromium(III), where the ligands contains at least 3 ammonium cations, central metal has formal −1 charge, and conjugated anions of the two cationic ammonium groups are acid-base homoconjugation, as catalyst. According to the present invention, the initial induction time can be reduced when the said polycarbonate is manufactured and it is possible to improve the activity of the catalyst and the molecular weight of the obtained polymer.