Title:
CONTROLLED PRODUCTION OF POLYGLYCOLIC ACID AND GLYCOLIDE
Document Type and Number:
WIPO Patent Application WO/2020/087221
Kind Code:
A1
Abstract:
Provided is a process for producing a product having polyglycolic acid and glycolide from methyl glycolate. The process comprises esterification, polycondensation and optimization. Also provided are a product produced by the process and a method of changing the amount of the polyglycolic acid in the product by modifying the amount of an esterification catalyst and/or adjusting the reaction temperature.
Inventors:
WANG SAIBO (CN)
Application Number:
PCT/CN2018/112474
Publication Date:
May 07, 2020
Filing Date:
October 29, 2018
Export Citation:
Assignee:
PUJING CHEMICAL IND CO LTD (CN)
International Classes:
C08G63/06; C07D319/12; C08G63/84
Foreign References:
| CN101054371A | 2007-10-17 | |||
| CN107177032A | 2017-09-19 | |||
| CN101495440A | 2009-07-29 | |||
| CN1668571A | 2005-09-14 | |||
| CN105272958A | 2016-01-27 | |||
| EP0789023A2 | 1997-08-13 | |||
| CN106432697A | 2017-02-22 | |||
| CN107177032A | 2017-09-19 | |||
| CN101054371A | 2007-10-17 | |||
| US20040138409A1 | 2004-07-15 | |||
| CN105218512A | 2016-01-06 |
Other References:
See also references of EP 3873968A4
Attorney, Agent or Firm:
SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)
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