Biodegradable polyester compositions with natural polymers and articles thereof
US5852078A · kind A · utility
13Cited by
41References
13Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 21, 1997 |
| Grant date | Dec 22, 1998 |
| Priority date | — |
| Expiry date | Feb 21, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L67/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Compositions of the invention include a hydroxy-functional polyester and a natural polymer. Articles can be made from such a composition so as to have sufficiently strong tensile strengths as to form disposable utensils or to have sufficient stretchability so as to form thin wrap films. However, the compositions are more environmentally friendly than commodity plastics such as polyethylene or polystyrene. Granular starches derived from a grain, a root, a legume, or mixtures thereof, are particularly preferred as the natural polymers for inclusion in the compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.