Flexible, elastic and biodegradable film made of polymer based on lactic acid, capable of being suitable especially for the production of medical dressings
US5296229A · kind A · utility
32Cited by
4References
7Claims
0Family size
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Inventor
Key dates
| Filing date | Jul 20, 1992 |
| Grant date | Mar 22, 1994 |
| Priority date | — |
| Expiry date | Jul 20, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The film is obtained directly by extrusion from the lactic acid-based polymer plasticised beforehand by incorporation of 5 to 30% by weight of the polymer of a glycerol ester obtained from an acid containing 4 carbon atoms in its molecule. The film has an elongation at break of more than 300% and is particularly suitable for the production of medical dressings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.