| 摘要 |
The invention relates to a porous material comprising at least one polyfunctional isocyanate (a1) and at least one polyfunctional substituted aromatic amine (a2-s) of the general formula I where R1 and R2 are selected from among hydrogen and linear or branched alkyl groups having from 1 to 6 carbon atoms and all substituents Q1 to Q5 and Q1′to Q5′are selected from among hydrogen, a primary amino group and a linear or branched alkyl group having from 1 to 12 carbon atoms, where at least one of Q1, Q3 and Q5 and at least one of Q1′, Q3′and Q5′is a primary amino group and the compound has at least one linear or branched alkyl group having from 1 to 12 carbon atoms in theαposition relative to at least one primary amino group bound to the aromatic ring. The invention further relates to a process for producing porous materials, the porous materials which can be obtained in this way and the use of the porous materials as insulation material and in vacuum insulation panels. |
