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. 18, 2025
Filed:
Jul. 11, 2022
Applicant:
SK Chemicals Co., Ltd., Seongnam-si, KR;
Inventor:
Kwang Sei Oh, Seoul, KR;
Assignee:
SK CHEMICALS CO., LTD., Seongnam-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 63/64 (2006.01); C08G 63/78 (2006.01);
U.S. Cl.
CPC ...
C08G 63/64 (2013.01); C08G 63/78 (2013.01);
Abstract
A heat-resistant, bio-based polycarbonate ester prepared by melt polycondensation of 1,4:3,6-dianhydrohexitol and a carbonate or 1,4-cyclohexanedicarboxylate is disclosed. The heat-resistant, bio-based polycarbonate ester includes a repeat unit 1 of Formula 1, a repeat unit 2 of Formula 2, and a repeat unit 3 of Formula 3. The polycarbonate ester has excellent heat resistance, transparency, and processability. A method of producing the polycarbonate includes a step of melt polycondensation of 1,4:3,6-dianhydrohexitol and a carbonate or 1,4-cyclohexanedicarboxylate.