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1. (WO1997017287) PROCESS FOR PREPARING ORGANICALLY MODIFIED AEROGELS USING ALCOHOLS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/017287 International Application No.: PCT/EP1996/004821
Publication Date: 15.05.1997 International Filing Date: 05.11.1996
Chapter 2 Demand Filed: 14.05.1997
IPC:
C01B 33/158 (2006.01) ,C01B 33/16 (2006.01) ,C04B 14/06 (2006.01)
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
33
Silicon; Compounds thereof
113
Silicon oxides; Hydrates thereof
12
Silica; Hydrates thereof, e.g. lepidoic silicic acid
14
Colloidal silica, e.g. dispersions, gels, sols
157
After-treatment of gels
158
Purification; Drying; Dehydrating
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
33
Silicon; Compounds thereof
113
Silicon oxides; Hydrates thereof
12
Silica; Hydrates thereof, e.g. lepidoic silicic acid
16
Preparation of silica xerogels
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
14
Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
02
Granular materials
04
Silica-rich materials; Silicates
06
Quartz; Sand
Applicants:
HOECHST RESEARCH & TECHNOLOGY DEUTSCHLAND GMBH & CO. KG [DE/DE]; Brüningstrasse 50 D-65929 Frankfurt am Main, DE (AllExceptUS)
SCHWERTFEGER, Fritz [DE/DE]; DE (UsOnly)
ZIMMERMANN, Andreas [DE/DE]; DE (UsOnly)
Inventors:
SCHWERTFEGER, Fritz; DE
ZIMMERMANN, Andreas; DE
Priority Data:
195 41 279.606.11.1995DE
Title (DE) VERFAHREN ZUR HERSTELLUNG VON ORGANISCH MODIFIZIERTEN AEROGELEN UNTER VERWENDUNG VON ALKOHOLEN
(EN) PROCESS FOR PREPARING ORGANICALLY MODIFIED AEROGELS USING ALCOHOLS
(FR) PROCEDE DE PREPARATION D'AEROGELS MODIFIES DE MANIERE ORGANIQUE A L'AIDE D'ALCOOLS
Abstract:
(DE) Die Erfindung betrifft ein Verfahren zur Herstellung von Aerogelen mit hydrophoben Oberflächengruppen, bei dem man a) ein silikatisches Lyogel vorlegt, b) gegebenenfalls das in Schritt a) vorgelegte Lyogel einem Lösungsmitteltausch zu einem anderen Lösungsmittel unterwirft, c) das in Schritt a) oder b) erhaltene Gel mit mindestens einem C1-C6-Alkohol oberflächenmodifiziert, und d) das in Schritt c) erhaltene, oberflächenmodifizierte Gel unterkritisch trocknet.
(EN) The invention concerns a process for preparing aerogels with hydrophobic surface groups, in which: a) a silicate-like lyogel is prepared; b) optionally, the lyogel prepared in step a) is subjected to a solvent exchange with another solvent; c) the gel obtained in step a) or b) is surface-modified with at least one C1-C6 alcohol; and d) the surface-modified gel obtained in step c) is dried subcritically.
(FR) L'invention concerne un procédé de préparation d'aérogels avec des groupes superficiels hydrophobes, selon lequel a) un lyogel silicateux est préparé, b) le lyogel obtenu est soumis à un échange par solvant avec un autre solvant, c) le gel obtenu à l'étape a) ou b) est modifié en surface avec au moins un alcool C1-C6, et le gel modifié en surface obtenu à l'étape c) est séché de manière sous-critique.
Designated States: JP, US
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: German (DE)
Filing Language: German (DE)
Also published as:
EP0859739US6140377JPH11514628