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:
Nov. 19, 2019
Filed:
Jan. 12, 2016
Applicant:
SK Chemicals Co., Ltd., Seongnam-si, Gyeonggi-do, KR;
Inventors:
Kwang Sei Oh, Seoul, KR;
Jong-In Lee, Seongnam-si, KR;
Assignee:
SK CHEMICALS CO., LTD., Seongnam-si, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G 63/78 (2006.01); C08G 63/64 (2006.01); C08G 63/66 (2006.01); C08G 63/672 (2006.01);
U.S. Cl.
CPC ...
C08G 63/64 (2013.01); C08G 63/66 (2013.01); C08G 63/672 (2013.01); C08G 63/78 (2013.01);
Abstract
A method for preparing a bio-based polycarbonate ester containing a repeating unit according to Formula 1 which comprises residue of Isosorbide and residue of CHDA (1,4-cyclohexanedicarboxylic acid). The method includes a nucleophilic reaction with phenol to prepare a 1,4-diphenyl-cyclohexanedicarboxylate, followed by a polycarbonate melt polycondensation reaction