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:
Oct. 11, 2016
Filed:
Jul. 30, 2013
Applicant:
Lotte Fine Chemical Co., Ltd., Ulsan, KR;
Inventors:
Hee Soo Kim, Yongin-si, KR;
Ye Jin Kim, Seoul, KR;
Soo Youn Choi, Jeonju-si, KR;
Min Kyoung Kim, Seoul, KR;
Ki Chull Yun, Cheonan-si, KR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 64/00 (2006.01); C08G 63/127 (2006.01); C08G 63/78 (2006.01); C08G 63/20 (2006.01); C08G 63/02 (2006.01);
U.S. Cl.
CPC ...
C08G 63/127 (2013.01); C08G 63/20 (2013.01); C08G 63/78 (2013.01);
Abstract
The present invention provides a method of preparing a polyester-based polymer and a polyester-based polymer prepared by the method. The method of preparing the polyester-based polymer includes a prepolymerization step of polymerizing a dicarboxylic acid compound (A), a diol compound (B), and an aromatic branching agent (C) at 160-220° C. to produce a prepolymer; and a condensation polymerization step of performing a condensation polymerization of the prepolymer at 200-250° C., under a vacuum pressure of 0.1 to 2 Torr.