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:
Feb. 20, 2018
Filed:
Sep. 12, 2016
Nanjing University, Nanjing, CN;
Hong Li, Nanjing, CN;
Quanxing Zhang, Nanjing, CN;
Xiangqian Sun, Nanjing, CN;
Yunlong Xu, Nanjing, CN;
Wei Huang, Nanjing, CN;
Aimin Li, Nanjing, CN;
NANJING UNIVERSITY, Nanjing, CN;
Abstract
A method for synthesizing poly(butylene adipate-co-terephthalate) by combination of melt and solid state polycondensation using an organic guanidine as a main catalyst. The ternary catalyst system includes a main catalyst, a first cocatalyst, and a second cocatalyst. The main catalyst is organic guanidine; the first cocatalyst is titanate ester or zirconate ester; and the second cocatalyst is metallic oxide. The method includes: 1) adding 1,4-butanediol (BDO), adipic acid (AA), terephthalic acid (TA), and a ternary catalyst system to a reaction still; conducting an oligo-polycondensation to yield a oligomer having the weight average molecular weight (M) of between 3.0×10and 4.0×10; allowing the oligomer to perform a melt polycondensation (MP) to yield a prepolymer with medium Mof between 1.5×10and 3.0×10; and 2) crushing the solid prepolymer into granules of 30-40 meshes, and then allowing the granules to undergo solid state polycondensation to yield the final PBAT product.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile