Process for the manufacture of open-celled foam essentially of inorganic constituents.

摘要

A moulding composition for manufacturing an open-celled foam product from essentially inorganic constituents is described. In addition to the components known per se, the moulding composition contains … …  - a stone-forming solid, …  - a hardener, …  - a foam-forming additive, … an additive with at least partially alkali-soluble protein products to obtain the open-celled character. …The stone-forming component used is especially a reactive solid from the group comprising … …  I a finely dispersed oxide mixture containing amorphous silica and alumina, …  II glassy amorphous electrostatic precipitator ash, …  III ground calcined bauxite, …  IV electrostatic precipitator ash from lignite-fired power stations, …  V undissolved amorphous SiO2, especially consisting of amorphous, disperse-pulverulent dehydrated or water-containing silica or from high-temperature processes (silica fume), …  VI metakaolin and …  VII cement. … …The hardener is especially an alkali metal silicate solution with 1.2-2.5 mol of SiO2 per mol of K2O and/or Na2O.