Porous based on aromatic amines and cycloaliphatic Gels

The invention relates to a porous gel comprising the following components, in reacted form: (a1) at least one polyfunctional isocyanate, (a2) at least one polyfunctional aromatic amine and (a3) at least one polyfunctional cycloaliphatic amine. The invention further relates to a process for preparing porous gels, to the porous gels thus obtainable and to the use of the porous gels as an insulating material and in vacuum insulation panels.