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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.:

US 10494521 B1

PDFFull Text
Date of Patent:
Dec. 03, 2019

Filed:

Feb. 24, 2017

Biodegradable polyester composition

Applicants:

Kingfa Sci. & Tech. Co., Ltd., Guangdong, CN;

Zhuhai Wango Chemical Co., Ltd., Guangdong, CN;

Tianjin Kingfa New Material Co., Ltd., Tianjin, CN;

Inventors:

Changli Lu, Guangdong, CN;

Zhimin Yuan, Guangdong, CN;

Tongmin Cai, Guangdong, CN;

Xianbo Huang, Guangdong, CN;

Xiangbin Zeng, Guangdong, CN;

Jian Jiao, Guangdong, CN;

Renxu Yuan, Guangdong, CN;

Yuke Zhong, Guangdong, CN;

Kai Xiong, Guangdong, CN;

Hui Yang, Guangdong, CN;

Kaijin Mai, Guangdong, CN;

Xueteng Dong, Guangdong, CN;

Assignees:

KINGFA SCI. & TECH. CO., LTD., Guangdong, CN;

ZHUHAI WANGO CHEMICAL CO., LTD., Guangdong, CN;

TIANJIN KINGFA NEW MATERIAL CO., LTD., Tianjin, CN;

Attorney:

JCIPRNET

Primary Examiner:

Randy P Gulakowski

Assistant Examiner:

Ha S Nguyen

Int. Cl.
CPC ...
C08L 67/02 (2006.01); C08G 59/17 (2006.01); C08K 5/156 (2006.01); C08L 3/02 (2006.01); C08L 67/04 (2006.01); C08K 13/02 (2006.01); C08K 5/00 (2006.01); C08J 5/18 (2006.01); C08K 5/07 (2006.01); C08K 3/013 (2018.01); C08K 5/12 (2006.01); C08L 25/14 (2006.01);
U.S. Cl.
CPC ...
C08L 67/02 (2013.01); C08G 59/1466 (2013.01); C08K 5/156 (2013.01); C08K 13/02 (2013.01); C08L 3/02 (2013.01); C08L 67/04 (2013.01); C08K 5/0016 (2013.01); C08K 5/0075 (2013.01); C08L 2201/06 (2013.01); C08L 2201/08 (2013.01);
Abstract

A biodegradable polyester composition based on a total weight of the biodegradable polyester composition, including a weight content of a cyclic ester compound having a structure shown as formula (I), which is 100 ppm-950 ppm; and based on the total weight of the biodegradable polyester composition, a weight content of cyclopentanone is 0.5 ppm-85 ppm is provided. The cyclic ester compound and cyclopentanone is added into the composition and controlling the content of the cyclic ester compound and the content of cyclopentanone in a certain range in the composition to realize an anti-thermal oxidative aging property of the biodegradable polyester composition. In addition, a film is prepared by blow molding or a part is prepared by injection molding after being digested with 95% ethanol at 40° C. for 240 hours.

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