Patent ID: 6410096
Filing Date: 2002-06-25
Classification: A23C,A23P,C09D,C12P

Abstract:
Method for producing a biologically degradable polyhydroxyalkanoate coating on a product in the form of an elastomeric film, wherein an aqueous dispersion of poly-hydroxyalkanoate 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, wherein the film formation takes place at a temperature lower than the melting point of the polyhydroxyalkanoate and wherein the polyhydroxyalkanoate used is a polymer which occurs in Pseudomonas, said method of producing an elastomeric film being carried out in absence of further steps of hot fusion, hot pressing or contact with chloroform or halogenated solvents to obtain the elastomeric characteristic with the proviso the polyhydroxyalkanoate is not a polymer or copolymer of &bgr;-hydroxybutyrate or &bgr;-hydroxy-valerate.