TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The polyisocyanate component (a) exhibits a viscosity of 6-60 mpa at 23 degrees C, an average isocyanate functionality of 2.8-5 and contains 13-23 wt.% of isocyanate groups. The polyisocyanates (ai) is allophanate, biuret, isocyanurate, iminooxadiazinedione, oxadiazinetrione, uretdione and/or urethane-containing derivatives of hexamethylene diisocyanate having a viscosity of 80-4000 mpa at 23 degrees C, 16-24.5 wt.% of isocyanate groups and an average isocyanate functionality of at least 2. The polyisocyanates (aii) is isocyanurate-containing polyisocyanates based on isophorone diisocyanate and/ or 2,4 '- and 4,4'-diisocyanatodicyclohexylmethane having 13-19 wt.% of isocyanate groups. The polyurethane body is glazier set. The polyurethane body is hard or semi-rigid integrated foam. The component (b) is hydroxyl-, amino- and/or mercapto functional compound with an average molecular weight of 62-1200. The component (b) is polyether polyols, polyester polyols, polycarbonate polyols and/or aminopolyethers with an average molecular weight of 500-12000 and/or low molecular weight hydroxy- and/or amino-functional components with an average molecular weight of 62-500. The component (c) is water propellant. The reaction of reactants are carried out at a temperature of 160 degrees C and a pressure of 300 bar. EXAMPLE - Polyisocyanate component (a) (69) with isocyanate content (21.2%), isocyanate functionality (3.2) (69) (prepared by reacting (aiv) isocyanurate group containing 1,6-hexamethylene polyisocyanate (prepared by process as described in EP-A 330 966 having isocyanate content (22.9%), isocyanate-functionality (3.2), monomer 1,6-hexamethylene diisocyanate (0.1%) and a viscosity of 1.200 mpa at 23 degrees C) and (av) isophorone diisocyanate (prepared as described in example 2 of EP-A-0003765 having isocyanate content (16.4%), isocyanate functionality (3.3), monomer Isophorone diisocyanate (0.2%))) were reacted with polyol (bi) (31) (prepared by stirring component (bi-a) (6300 g) (prepared by mixing and stirring 1,3-butanediol (3112 g), neopentyl glycol (1863 g), trimethylol propane (2568 g) and isophthalic acid (6706 g)), component (bi-b) (6300 g) (prepared by epsilon -caprolactone (4034 g), trimethylolpropane (9466 g) and tin (II)-2-ethylhexanoate (6.75 g)) and dipropylene glycol (1400 g) in a stirred tank for 1 hour at 60 degrees C), where the equivalent ratio of isocyanate groups to hydroxyl groups is 1:1 and the curing temperature was 70 degrees C. The obtained product exhibited a shore hardness of 84.