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:
May. 02, 2017
Filed:
May. 20, 2013
Lotte Fine Chemical Co., Ltd., Ulsan, KR;
S-enpol Co., Ltd., Wonju-si, KR;
Gyung Don Kang, Daejeon, KR;
Ki Chull Yun, Cheonan-si, KR;
Sang Yob Kim, Goyang-si, KR;
Kil Seuk Byun, Yongin-si, KR;
Jung Ryum, Seoul, KR;
Boo Seong Kim, Seoul, KR;
Sei Hoon Kim, Wonju-si, KR;
Sung Bae Park, Incheon, KR;
LOTTE FINE CHEMICAL CO., LTD., , KR;
S-ENPOL CO., LTD., , KR;
Abstract
Provided is a method of continuous preparation of a biodegradable aliphatic/aromatic polyester copolymer, the method including: performing a first esterification reaction of an aliphatic dihydroxy compound and an aliphatic dicarboxylic acid at a temperature of 185° C. or less; continuously performing a second esterification reaction of a reaction product obtained by the first esterification reaction; obtaining a pre-polymer by continuously performing a first polycondensation reaction of a reaction product obtained by the second esterification reaction; and continuously performing polycondensation reaction of the pre-polymer, wherein an aromatic carboxylic acid is added to a reactor in which the first esterification reaction or the second esterification reaction is performed, to prepare the biodegradable aliphatic/aromatic polyester copolymer. According to the method of continuous preparation of the biodegradable aliphatic/aromatic polyester copolymer as described above, the amount of the aliphatic dihydroxy compound used, which is a starting material, is reduced and accordingly, manufacturing costs are reduced.