Method of forming a polyester from a regenerated diacid formed from depolymerization of a waste material
US12331157B2 · kind B2 · utility
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46References
21Claims
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Key dates
| Filing date | Sep 16, 2022 |
| Grant date | Jun 17, 2025 |
| Priority date | — |
| Expiry date | Sep 16, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method of forming a polyester from a regenerated composition comprising a regenerated diacid and a catalyst obtained from depolymerization of a polyester in a waste material is disclosed. The method comprises: reacting a diol and the regenerated diacid in the regenerated composition to form one or more compounds including an ester bond; optionally providing additional catalyst; and polymerizing the one or more compounds including an ester bond to form a polyester.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.