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:
Jul. 23, 2019
Filed:
Jun. 12, 2016
Applicant:
Jiangsu Hengli Chemical Fibre Co., Ltd., Suzhou, CN;
Inventors:
Hongwei Fan, Suzhou, CN;
Fangming Tang, Suzhou, CN;
Xiaoyu Wang, Suzhou, CN;
Wengang Li, Suzhou, CN;
Lili Wang, Suzhou, CN;
Shanshui Wang, Suzhou, CN;
Qianhan Liu, Suzhou, CN;
Zangzang Niu, Suzhou, CN;
Assignee:
JIANGSU HENGLI CHEMICAL FIBRE CO., LTD., Suzhou, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 63/02 (2006.01); C08G 63/183 (2006.01); C08G 63/83 (2006.01); C08G 63/90 (2006.01); C08G 63/86 (2006.01); C25B 3/12 (2006.01); D01F 6/62 (2006.01); C08G 63/78 (2006.01);
U.S. Cl.
CPC ...
C08G 63/183 (2013.01); C08G 63/78 (2013.01); C08G 63/83 (2013.01); C08G 63/866 (2013.01); C08G 63/90 (2013.01); C25B 3/12 (2013.01); D01F 6/62 (2013.01);
Abstract
A polyester obtained by the esterification of terephthalic acid and ethylene glycol and the polycondensation catalysed by a mixture of magnesium ethylene glycol and antimony ethylene glycol followed by granulation. In the polyester sections, the carboxyl end group is less than 15 mol/t, the mass percentage of oligomer is lower than 0.5%, and weight percentage of diethylene glycol is lower than 0.5%.