| 摘要 |
PCT No. PCT/NL95/00222 Sec. 371 Date Jan. 23, 1997 Sec. 102(e) Date Jan. 23, 1997 PCT Filed Jun. 23, 1995 PCT Pub. No. WO96/00263 PCT Pub. Date Jan. 4, 1996A 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 polyhydroxyalkanoates 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, such a temperature even for example being more than 35 DEG C. below the melting point and in which the polyhydroxyalkanoate used is a polymer which is made up of saturated or unsaturated 3-hydroxy fatty acids having a carbon-chain length of 6-14 and/or is a Pseudomonas polyhydroxyalkanoate other than a polymer or copolymer of beta -hydroxyvalerate or beta -hydroxybutyrate, without requiring additional steps to render the film elastomeric. Product coated with such a polyhydroxyalkanoate film, in particular a coated product to be applied to or consumed by a human being or animal or a product which must not be exposed to a temperature equal to or more than 100 DEG C., such as cheese.
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