| 摘要 |
PCT No. PCT/EP96/02894 Sec. 371 Date Jan. 8, 1998 Sec. 102(e) Date Jan. 8, 1998 PCT Filed Jul. 2, 1996 PCT Pub. No. WO97/03017 PCT Pub. Date Jan. 30, 1997The inventive process concerns the preparation of organically modified aerogels and their use. The process the invention comprises: a) introducing a siliceous lyogel or hydrogel, b) optionally subjecting the gel prepared in a) to complete or partial solvent exchange with an organic solvent, c) reacting the gel obtained in step a) or b) with at least one silylation agent, d) optionally washing the silylated gel obtained in step c) with an organic solvent, and e) drying the gel obtained in step c) or d) subcritically, which comprises reacting in step c) the gel obtained in step a) or b) with at least one chlorine-free silylation agent.
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