Method for producing a biologically degradable polyhydroxyalkanoate coating with the aid of an aqueous dispersion of polyhydroxyalkanoate
US6410096B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1999 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Jul 6, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D167/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method for producing a biologically degradable polyhydroxyalkanoate coating in the form of an elastomeric film, wherein an aqueous dispersion of polyhydroxyalkanoate or a mixture of polyhydroxyalkanoate is prepared and the dispersion is applied to the surface to be coated, after which water is made or allowed to evaporate to obtain a polyhydroxyalkanoate film, the film formation taking place at a temperature lower than the melting point of the polyhydroxyalkanoate, wherein the polyhydroxyalkanoate is a Pseudomonas polyhydroxyalkanoate other than a polymer or copolymer of &bgr;-hydroxyvalerate or &bgr;-hydroxybutyrate, without requiring additional steps to render the film elastomeric.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.