| abstract |
The invention relates to reactive polyurethane compositions that can be produced by reacting polyols with a stoichiometric excess of mixtures consisting of asymmetric polyisocyanates having a molecular weight of less than 500 and an NCO functionality ranging from 0.175 to 2.5 and high-molecular isocyanates. These high-molecular polyisocyanates consist, according to WO 01/40342, of low-molecular diols and of monomeric diisocyanates. These reactive polyurethane compositions are suited for producing reactive hot-melt-type adhesives, solvent-free or solvent-containing laminating adhesives, assembly foams, casting compounds, soft/hard and integral foams and for producing reactive one-component or two-component adhesives/sealants. |