| abstract |
A new process for the production of elastomeric moldings based on polyisocyanate polyadducts containing urea groups from organic polyisocyanates and compounds with groups of molecular weight 500 to 12000 which are reactive towards isocyanate groups, water, optionally organic compounds with hydrogen atoms of molecular weight range 60 to 499 which are reactive towards isocyanate groups, optionally under The use of auxiliaries and additives, the water being used in an amount of at least 10 mol%, based on the molar amount of isocyanate groups of the polyisocyanates, and the reaction mixture prepared from the components being poured into an open mold using the casting process, the registered Amount makes up at least 95% of the volume of the molded part and then tightly closes the mold, so that the carbon dioxide formed can practically not lead to expansion of the reaction mixture. |