Method for making biodegradable polyhydroxyalkanoate copolymers having improved crystallization properties
US6838037B2 · kind B2 · utility
9Cited by
19References
20Claims
0Family size
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Key dates
| Filing date | Jun 20, 2003 |
| Grant date | Jan 4, 2005 |
| Priority date | — |
| Expiry date | Jun 20, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L63/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Methods for enhancing the rate of a first biodegradable polyhydroxyalkanoate having a copolymer, or a blend thereof, of at least two randomly repeating monomer units, and has a melting point Tm1, by solution blending or melt blending the first biodegradable polyhydroxyalkanoate with a second crystallizable biodegradable polyhydroxyalkanoate homopolymer or copolymer, which has at least one randomly repeating monomer unit and a melting point Tm2, wherein Tm2 is at least about 20□C. greater than Tm1. Methods for forming shaped articles from the blending of the two polyhydroxyalkanoates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.