| 摘要 |
The present invention relates to a method for producing a multilayer dielectric polyurethane film system comprising the following method steps: I) producing a mixture comprising a) a compound containing isocyanate groups with an isocyanate group content of >10% by weight and ≦̸50% by weight, b) a compound containing isocyanate reactive groups with an OH number of ≧20 and ≦̸150, wherein the sum of the number average functionality of isocyanate groups and of isocyanate reactive groups in compounds a) and b) is ≧2.6 and ≦̸6, II) applying the mixture immediately after it has been produced to a substrate in the form of a wet film, III) curing said wet film while forming the polyurethane film and IV) applying an electrode layer on the almost completely dried film, V) repeating steps I)-IV) to generate a multilayer system. The invention further relates to a multilayer dielectric polyurethane film system and an electromechanical transducer. |
