Biodegradable polyester composition
US10435556B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 24, 2017 |
| Grant date | Oct 8, 2019 |
| Priority date | — |
| Expiry date | Apr 15, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/03
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A biodegradable polyester composition based on a total weight of the biodegradable polyester composition, including a weight content of a cyclic ester compound having a structure shown as formula (I) which is 100 ppm-950 ppm; and based on the total weight of the biodegradable polyester composition, a weight content of tetrahydrofuran is 3 ppm-200 ppm is provided. The cyclic ester compound and tetrahydrofuran is added into the composition and controlling the content of the cyclic ester compound and the content of tetrahydrofuran in a certain range in the composition to realize an anti-thermal oxidative aging property of the biodegradable polyester composition. In addition, a film is prepared by blow molding or a part is prepared by injection molding after being digested with 95% ethanol at 40° C. for 240 hours.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.