Poly(3-hydroxybutanoic acid) film
US5917002A · kind A · utility
19Cited by
2References
6Claims
0Family size
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Inventors
Key dates
| Filing date | Dec 18, 1997 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | Dec 18, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/04
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
Poly(3-hydroxybutanoic acid) having a number average molecular weight of not less than 500,000 is oriented at a draw ratio of 2-fold or more to reproducibly obtain a film made of poly(3-hydroxybutanoic acid) having biodegradability and biocompatibility as well as sufficient strength and flexibility (for example, tensile strength of not less than 30 MPa and elongation to break of not less than 15%).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.