Hoechst Aktiengesellschaft

Societe Francaise Hoechst

Eric Jacquinot

Douglas M Smith

Gerd Reinhardt

Andreas Zimmermann

Rolf-Michael Jansen

Gerhard Noltner

Frank Jaekel

Manfred Muller

Armand Eranian

Xerogels and a process for their preparation involving acidifying an aqueous waterglass solution, polycondensing the resulting silica by addition of a base, removing most of the water from the gel by washing the gel with an organic solvent, reacting the resulting gel with a silylation agent and then drying the silylated gel under subcritical conditions.

Xerogels and process for their preparation

The present invention relates to stable granules comprising active substance, granulating auxiliary, enveloping substance and if appropriate additional components, wherein the enveloping substance in each case comprises

Stable granules for detergents, cleaning agents and disinfectants

Polymerizable luminescent fluid composition, characterized by the fact that it contains by weight (a) 30 to 45% of one or more luminescent mineral pigments, (b) 10 to 30% of silica particles, having a diameter comprised between 7 and 1000 nm, not linked to each other by siloxane bonds, and (c) the complement to 100% of 2-hydroxy ethyl acrylate and/or 2-hydroxy ethyl methacrylate and use for obtaining luminescent compounds.

Polymerizable luminescent fluid composition and its use

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Attichy, France

Eric Jacquinot