公开(公告)号：CA2683529A1

公开(公告)日：2008-11-20

申请号：CA2683529

申请日：2008-05-16

Applicant: BASF AG

Inventor： RAMAN VIJAY IMMANUEL ,  EMGE ANDREAS ,  SCHAEDLER VOLKER ,  FRICKE MARC ,  SANCHEZ-FERRER ANTONIO ,  WIEGMANN WERNER

IPC: C08G18/32 ,  C08G18/76

Abstract: The invention relates to a xerogel comprising: 30 to 90 wt.% of a monomer component (a1) of at least one polyfunctional isocyanate and from10 to 70 w t.% of a monomer component (a2) of at least one polyfunctional aromatic amin e, of which at least one is selected from 4,4'-diaminodiphenylmethane, 2,4'- diaminodiphenylmethane, 2,2'-diaminodiphenylmethane and oligomeric diaminodi phenylmethane, wherein the sum of the wt.% of the monomer components (a1) an d (a2) is 100 wt.% and the monomer components are present in the xerogel in the polymeric form and the volume-weighted mean pore diameter of the xerogel is a maximum of 5 .mu.m. The invention further relates to a method for prod uction of xerogels, the xerogels obtained thus and the use of said xerogels as insulation and in vacuum insulation panels.