Biodegradable polyester resin, preperation method thereof, and biodegradable polyester film comprising the same
US11667751B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2022 |
| Grant date | Jun 6, 2023 |
| Priority date | — |
| Expiry date | May 25, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W90/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a biodegradable polyester resin, in which the first repeat unit comprising a first diol residue and an aromatic dicarboxylic acid residue and the second repeat unit comprising a second diol residue and an aliphatic dicarboxylic acid residue satisfy a ratio of the number of repeat units in a specific range, and the softness index of the resin satisfies a specific range, and to a process for preparing the same. Since the biodegradable polyester resin can provide a biodegradable polyester sheet or film that can be simultaneously enhanced in productivity, processability, and moldability and is excellent in tensile strength, tear strength, and friction coefficient and excellent in biodegradability and water degradability, it can be utilized in more diverse fields.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.