| abstract |
[57] Foamed plastic materials based on polyisocyanate polyaddition products by reacting isocyanates with isocyanate-reactive compounds in the presence of catalysts and, optionally, auxiliaries and / or additives To manufacture. (I) An isocyanate having an isocyanurate structure and / or a biuret structure is used, and the isocyanate-reactive compound to be used is (ii) 400 At least one diol having a molecular weight of ~ 8000 and containing at least 50% of primary hydroxyl groups, based on the total hydroxyl groups present in the compound, and / or Or (iii) at least one compound having at least one primary amine group and a diol and / or triol having a molecular weight of less than 400, optionally as chain extender and / or crosslinker The reaction is carried out in the presence of (iv) at least one tertiary amine acting as a catalyst and / or (v) at least one metal salt acting as a catalyst, and (vi) water. |