Biodegradable polyhydroxyalkanoate copolymers having improved crystallization properties
US6825285B2 · kind B2 · utility
4Cited by
19References
20Claims
0Family size
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Key dates
| Filing date | Jun 20, 2003 |
| Grant date | Nov 30, 2004 |
| Priority date | — |
| Expiry date | Jun 20, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L67/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Compositions having improved crystallization properties and physical properties including a continuous phase of a first biodegradable polyhydroxyalkanoate comprising a copolymer, or a blend thereof, of at least two randomly repeating monomer units and having a melting point Tm1, and a second crystallizable biodegradable polyhydroxyalkanoate homopolymer or copolymer, which comprises at least one randomly repeating monomer unit and has a melting point Tm2, where Tm2 is at least about 20□C. greater than Tm1. The compositions are formed by solution or melt blending of the components and may be formed into shaped articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.