Invention Grant
- Patent Title: Resorbable polymer purification process
-
Application No.: US16643375Application Date: 2018-08-31
-
Publication No.: US11261293B2Publication Date: 2022-03-01
- Inventor: Jie Lu , Boris Obermeier , Regina Arnold-Stanton , Adolphus G. Jones
- Applicant: Evonik Corporation
- Applicant Address: US NJ Parsippany
- Assignee: Evonik Corporation
- Current Assignee: Evonik Corporation
- Current Assignee Address: US NJ Parsippany
- Agent Linda S. Li; Andrew H. Chung; Jason S. Ngui
- International Application: PCT/US2018/049140 WO 20180831
- International Announcement: WO2019/046748 WO 20190307
- Main IPC: C08G63/08
- IPC: C08G63/08 ; C08G63/90 ; C08G63/85 ; C08K3/04 ; C08K5/09
Abstract:
The present invention is directed to an improved purification process using additive and activated carbon for purifying resorbable polymers suitable for industrial manufacturing. The metal catalyst concentration in the purified resorbable polymers of this invention is preferably less than 1 ppm. The method can be used to obtain high molecular weight polymers that are substantially metal free.
Information query
