Polyurethane-carbohydrate-based substances which can be calendered to produce biodegradable materials
US4873270A · kind A · utility
45Cited by
4References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1988 |
| Grant date | Oct 10, 1989 |
| Priority date | — |
| Expiry date | Feb 9, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2201/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A substance based on polyurethane from which biodegradable materials can be obtained by rolling comprises, as well as a polyurethane resin serving as its essential constituent, a carbohydrate, at least one second thermoplastic polymer which is miscible in the molten state with the polyurethane resin and/or at least one third biodegradable polymer chosen from among biodegradable aliphatic polyesters, preferably of the same nature as the polyurethane resin used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.