3-hydroxybutyrate polymer composition
US5061743A · kind A · utility
13Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 1990 |
| Grant date | Oct 29, 1991 |
| Priority date | — |
| Expiry date | May 30, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/5317
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Certain hydroxy alkanoate polymers, such as 3-hydroxybutyrate polymers, when obtained by solvent extraction from fermentation masses, can have long cycle times during thermal processing due to a low rate of crystallization. A combination of (a) an organophosphonic or organophosphoric acid or ester with (b) an oxide, hydroxide, or carboxylate of a metal of Groups I to V is an effective nucleating agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.