Catalyst and process for ring opening polymerization
US11787821B2 · kind B2 · utility
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Key dates
| Filing date | Dec 18, 2020 |
| Grant date | Oct 17, 2023 |
| Priority date | — |
| Expiry date | Jul 1, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/37
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention discloses new catalyst systems based on trivalent metal complexes of Formula I, which can facilitate the stereospecific ring-opening polymerization of (rac)-β-Butyrolactone (rac-BBL). Also provided is a process for the stereospecific synthesis of aliphatic polyesters using the catalysts of Formula I, including alcohols and polyols as chain-transfer agents to facilitate immortal ring-opening polymerization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.