| abstract |
The invention relates to a porous material containing at least one multifunctional isocyanate (a1) and at least one multifunctional substituted aromatic amine (a2-s) according to the general formula (I), where R 1 and R 2 are selected from hydrogen and linear or branched alkyl groups having from 1 to 6 carbon atoms, and where all substituents Q 1 to Q 5 and Q 1' to Q 5' are selected from hydrogen, a primary amino group, and a linear or branched alkyl group having from 1 to 12 carbon atoms, wherein at least one of Q 1 , Q 3 , and Q 5 and at least one of Q 1' , Q 3' , and Q 5' is a primary amino group, and the compound comprises at least one linear or branched alkyl group having from 1 to 12 carbon atoms in the α-position to at least one primary amino group bonded to the aromatic core. The invention further relates to a method for producing porous materials, to the porous materials that can be thus obtained, and to the use of the porous materials as insulating material and in vacuum insulation panels. |