| abstract |
(57) [Summary] (Modified)nThe compound element comprises the following layer structure: (i) a metal of 2 to 20 mm, (ii) (a) an isocyanate, and (b) a compound having reactivity to isocyanate, a polyisocyanate polyaddition product 10 obtained by reacting 0.1 to 50% by volume, based on volume, of at least one gas (c), optionally in the presence of (d) a catalyst and / or (f) auxiliaries and / or additives. It has a layer structure composed of an isocyanate polyaddition product of 300 mm and a metal of (iii) 2-20 mm. |