Continuous glycolide-L-lactide copolymer production process development
US12269920B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2021 |
| Grant date | Apr 8, 2025 |
| Priority date | — |
| Expiry date | Apr 11, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/823
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is directed to continuous reaction processes for preparing a glycolide/L-lactide copolymer formulation by continuously introducing glycolide monomer, L-lactide monomer, initiator and optionally a catalyst into at least one continuous reactor vessel under dry nitrogen environment, wherein the monomers, initiator, and optional catalyst are mixed at a first lower temperature and then transferred to a second continuous reactor operating at a second higher temperature, and then exothermally reacting and maintaining at a steady state, the blend of glycolide monomer, lactide monomer, initiator and optional catalyst to produce a PLGA copolymer reaction product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.