| abstract |
Mixtures of compounds containing at least two hydrogen atoms which are reactive towards isocyanates and having a molecular weight of from 400 to 10000, and finely divided polyurethane powder as filler, which contain from 0.5 to 25 % by weight (based on the filler) of nonvolatile viscosity reducers of the formula (I) <IMAGE> where D is hydrogen or an alkyl radical having 2 to 12 carbon atoms, E is a monovalent to trivalent aromatic radical having 6 to 12 carbon atoms which forms recurring units and optionally contains urea groups, X is H and/or CH3, and m and n are integers, where n, corresponding to the valency of the radical E, is a number from 1 to 3, and m adopts values of between 1 and 100, are employed as starting component in the preparation of polyurethane plastics. |