Patent DE-102008044388-A1 (DE)
Title: Electrically or magnetically stimulatable material useful in medicine technology, which changes its mechanical properties during applying electric current and electric/magnetic field within very short time, comprises first and second layer
Inventor: REDTEL HOLGER
IPC: C08J5/12
Filed: 2008-12-05
Abstract: The electrically or magnetically stimulatable material, which changes its mechanical properties during applying an electric current and an electric/magnetic field within very short time, where a multi-layered material is produced on basis of polyetherurethane by extrusion/injection molding, comprises a first layer made of polyetherurethane on the basis of polyether alcohol of the hydroxyl functionality of 1.95-2.95 and molar mass of 1000-6000 with organic nanoparticles embedded and/or integrated in polymer chain, short chain diols, optionally further additives and di-and/or polyisocyanates. The electrically or magnetically stimulatable material, which changes its mechanical properties during applying an electric current and an electric or magnetic field within very short time, where a multi-layered material is produced on the basis of polyetherurethane by extrusion or injection molding, comprises a first layer made of polyetherurethane on the basis of polyether alcohol of the hydroxyl functionality of 1.95-2.95 and the molar mass of 1000-6000 with organic nanoparticles embedded and/or integrated in the polymer chain, short chain diols, optionally further additives and di-and/or polyisocyanates, and a second layer made of polyetherurethane on the basis of polyether alcohol of the hydroxyl functionality of 1.95-2.95 and the molar mass of 1000-5000 with inorganic nanoparticles embedded and/or integrated in the polymer chain, short chain diols, optionally further additives and di-and/or polyisocyanates. The layers undetachably join with one another during the processes on the basis of physical or chemical interactions, so that the composite material receives an alignment of the inorganic particles during applying a voltage or electric or magnetic field, where the property of the material suddenly changes and the outer shell and/or outer lying layer effectively prevents an interaction with the environment. The first layer is structured on the basis of nanoscale organic dispersions in polyether alcohols, which are produced by depolymerization of polyurethane-cold-form soft foam materials using a glycol mixture in presence of polyamine with secondary and primary aminogroups and subsequent stabilization with polypropylene glycol and optionally further glycol, glycols as chain extenders and diisocyanate and/or the first layer is structured on the basis of nanoscale organic dispersions in polyether alcohols, which are produced by depolymerization of urea-formaldehyde condensates using glycol and water, glycols as chain extenders and diisocyanate. The second layer is structured on the basis of polyether alcohols with nanoscale metal oxides, metal oxide hydrates and/or metal hydroxides of iron metals dispersed in it, glycols as chain extenders and diisocyanate, the second layer is structured on the basis of polyether alcohols with nanoscale complex mixed oxides or mixed hydroxides of iron metals dispersed in it and silicon, germanium, rare earth metals as carrier, glycols as chain extenders and diisocyanate, the second layer is structured on the basis of polyether alcohols with nanoscale complex iron mixed oxides dispersed in it, glycols as chain extenders and diisocyanate and/or the second layer is structured on the basis of polyether alcohols with nanoscale complex mixture of manganese-, cobalt- or nickel oxides dispersed in it, glycols as chain extenders and diisocyanate. Independent claims are included for: (1) a method for producing an electrically or magnetically stimulatable material; (2) a method for generating mechanical property changes of polymeric composite material; and (3) a molded body for reaction at a permanent magnetic field.