Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Alfred Kaiser

Helmut Schmidt

Horst Scholze

Membranes based on silicic acid heteropolycondensates are produced by hydrolytic polycondensation of at least one silicic acid derivative in the presence of water and, if appropriate, a condensation catalyst, the polycondensation being carried out at the surface of a support, which supports the resulting membrane. The reactants can be fed to the surface of the support via the gas phase or via one or more liquid phases.

Membranes based on silicic acid heteropolycondensates and a process for

Abrasive compositions comprising a porous, organo-modified silicic acid hropolycondensate as abrasive and one or more conventional components selected from the group of carriers, adjuvants and active substances such as pharmaceuticals, disinfectants, insecticides, bactericides, etc. The compositions are useful in medical and cosmetic applications, such as in the treatment of acne or as a tooth paste, and also in various technical and industrial fields, e.g., as a polishing or cleansing material.

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Kist, Germany

Alfred Kaiser