本发明涉及一种用于制造泡沫，其包括：a）用b聚异氰酸酯）的至少一个的至少两个有机化合物的含环氧基，c）至少一种异氰酸酯/环氧化物反应促进催化剂，D）的化学和/或物理发泡剂和 e）任选地混合的助剂和添加剂的反应混合物，其中异氰酸酯基的当量比，以环氧化物的基团1.2：1至500：1，并且将反应混合物于泡沫起反应，所述异氰酸酯/环氧化物反应促进催化剂的至少一个 包括催化剂，其包含至少一种异氰酸酯 - 反应性氢原子，以及通过该方法获得的泡沫和在建筑行业中使用这些泡沫的作为填充泡沫或泡沫芯的夹层结构，并用于生产建筑材料，或绝缘材料。

The present invention relates to a method for producing a foam which comprises a) polyisocyanate with b) at least one at least two epoxy-containing organic compound, c) at least one isocyanate / epoxide reaction-accelerating catalyst, d) chemical and / or physical blowing agents and e) optionally auxiliaries and additives to form a reaction mixture, wherein the equivalent ratio of isocyanate groups to epoxide groups of 1.2: 1, and reacting the reaction mixture to foam, the isocyanate / epoxide reaction accelerating catalyst is at least one: 1 to 500 comprising catalyst which comprises at least one isocyanate-reactive hydrogen atom, as well as foams obtainable by this process and the use of these foams. as filling foam in construction or foam core sandwich structures and for the production of construction materials or insulating materials