Mikrozelluläres, harnstoffgruppenhaltiges Polyurethanelastomer

摘要

The invention relates to a microcellular PU elastomer with improved dynamic-mechanical characteristics, based on an isocyanate component consisting essentially of 4,4'-MDI and on other standard components. The proposed elastomer following tempering at temperatures of 100-120 DEG C for 8-24 hours has a melting range of between 130 DEG C as minimum lower limit and 230 DEG C as minimum upper limit, as measured by differential scanning calorimetry (DSC) at a heating rate of 20 DEG C/min and a urea content of 14-18 wt.%. Also disclosed are a process for producing such a microcellular PU elastomer with improved dynamic-mechanical characteristics and the use of said elastomers in the production of damping elements.