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:
Mar. 22, 2016
Filed:
May. 28, 2012
Yong He, Shanghai, CN;
Pujing Zuo, Shanghai, CN;
Zinong YE, Shanghai, CN;
Masatoshi Aoyama, Shanghai, CN;
Xin Zeng, Shanghai, CN;
Xiangqun Fan, Shanghai, CN;
Xiaji Dai, Shanghai, CN;
Jing LU, Shanghai, CN;
Yong He, Shanghai, CN;
Pujing Zuo, Shanghai, CN;
Zinong Ye, Shanghai, CN;
Masatoshi Aoyama, Shanghai, CN;
Xin Zeng, Shanghai, CN;
Xiangqun Fan, Shanghai, CN;
Xiaji Dai, Shanghai, CN;
Jing Lu, Shanghai, CN;
Toray Industries, Inc., , JP;
Abstract
A solid-phase polymerization method of high-molecular-weight aliphatic polyester conducts the solid-phase polymerization of aliphatic polyester prepolymer under a gas stream containing sulfonic acid catalyst. The method features preparing metal free aliphatic polyester with high molecular weight, good color and luster and perfect thermal stability efficiently. The non-metal-ion aliphatic polyester is not only applicable to common use, but is also suitable as high value-added medical material and packing material which contacts with food directly than other metal-containing polyester.