Resorbable polymer purification process
US11261293B2 · kind B2 · utility
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2References
13Claims
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Assignee
Inventors
Key dates
| Filing date | Aug 31, 2018 |
| Grant date | Mar 1, 2022 |
| Priority date | — |
| Expiry date | Aug 31, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/09
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.