ENERGY CONVERTER BASED ON POLYURETHANE SOLUTIONS

摘要

#CMT# #/CMT# Use of a solution containing at least one polyurethane in one or more organic solvents for producing a converter to convert electrical energy into mechanical energy or mechanical energy into electrical energy, which contains two electrodes and at least a polymer layer that is arranged between two electrodes and is produced from the solution of polyurethane in organic solvents, is claimed. #CMT# : #/CMT# An independent claim is included for producing the converter comprising preparing the polymer layer from the solution, where the polymer layer is produced by directly applying the solution to an electrode and then coating on another side of the electrode, and the polymer layer is coated on both sides of electrodes. #CMT#USE : #/CMT# The solution of polyurethane is useful for producing a converter to convert electrical energy into mechanical energy or mechanical energy into electrical energy, where the converter is useful in actuator, sensor and generator, which are useful in a device, preferably electronic and electrical devices (all claimed). #CMT#ADVANTAGE : #/CMT# The solution of polyurethane provides converter with good mechanical properties such as high elasticity and high elongation, high electrical resistance and very low water absorption. #CMT#ORGANIC CHEMISTRY : #/CMT# Preferred Components: The organic polyisocyanate comprises difunctional isocyanate building blocks, preferably hexamethylene diisocyanate, isophorone diisocyanate (both preferred) and/or isomeric bis-(4,4'-isocyanatocyclohexyl) methane. The solvent is ester, alcohol, ketone, ether (all preferred), aromatic solvent and/or amide or urea group-containing solvents. The solvent or solvent mixture contains 10-80 wt.% of alcohols. The solution contains less than 5, preferably 0.3 wt.% of water. #CMT#POLYMERS : #/CMT# Preferred Process: The production of polymer layer comprises (a) producing isocyanate functional prepolymers from organic polyisocyanates, polymeric polyols having a molecular weight (number average) of 400-8000 g/mol and an average hydroxyl functionality of 1.5-6 and optionally hydroxyl functionalized compounds with molecular weights of 62-399 g/mol and (b) completely or partially converting the free isocyanate groups of the prepolymer of (a) with amino-functional compounds with a molecular weight of 32-1000 g/mol, where the prepolymer is dissolved in one or more organic solvents before, during and/or after the step (b). Preferred Components: The polymeric polyol comprises polyester polyols, polyacrylate polyols, polyurethane polyols, polycarbonate polyols, polyether polyols, polyester polyacrylatepolyol, polyurethane polyacrylate polyol, polyurethane polyester polyol, polyurethane polyether polyol, polyurethane polycarbonate polyol, polyesterpolycarbonate polyol, hydroxyl group containing polycarbonates and/or polyether polycarbonate diols, preferably polytetramethylene glycol polyether. #CMT#EXAMPLE : #/CMT# No suitable example given.