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:
Aug. 16, 2016
Filed:
Jul. 18, 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
A continuous preparation method of a biodegradable aliphatic/aromatic polyester copolymer includes: performing a first esterification reaction of an aliphatic dihydroxy compound with an aliphatic dicarboxylic acid at a temperature of 185° C. or less; continuously performing a second esterification reaction of a reaction product from the first esterification reaction; continuously performing a first polycondensation reaction of a reaction product from the second esterification reaction to obtain a prepolymer; continuously performing a second polycondensation reaction of the prepolymer to obtain a second polycondensation reaction product having an intrinsic viscosity from about 0.9 dl/g to about 1.0 dl/g; and continuously performing a third polycondensation reaction of the second polycondensation reaction product to prepare the biodegradable aliphatic/aromatic polyester copolymer, wherein the performing of the first esterification reaction or the continuously performing of the second esterification reaction includes adding an aromatic carboxylic acid. The biodegradable aliphatic/aromatic polyester copolymer prepared by control of the intrinsic viscosity of the second polycondensation reaction product may be improved in processibility, film formability, tensile/tearing strength, and blending ability with another polymer resin. Use of a less amount of the aliphatic dihydroxy compound as a starting material may reduce manufacturing costs.