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1. (WO2013156852) METHOD FOR FORMING A QUICKLY HARDENING, INORGANIC FOAM

Pub. No.:    WO/2013/156852    International Application No.:    PCT/IB2013/000869
Publication Date: Fri Oct 25 01:59:59 CEST 2013 International Filing Date: Tue Apr 09 01:59:59 CEST 2013
IPC: C04B 38/02
C01F 7/02
C04B 28/26
Applicants: CAST ALUMINIUM INDUSTRIES
Inventors: FEIGE, Reinhard
AHMED, Waheed
NAZIR, Muhammad Kashif
Title: METHOD FOR FORMING A QUICKLY HARDENING, INORGANIC FOAM
Abstract:
The invention relates to a method for forming a quickly hardening, inorganic foam on the basis of the reaction of two components: a) a solid component in the form of a reactive powder, which simultaneously has both framework-forming properties and pore-forming properties, and b) a liquid component in the form of an alkali metal silicate (water glass), wherein the reactive powder contains 45-65 wt% of aluminum oxide, 10-20 wt% of aluminum nitride, and 5-15 wt% of metal aluminum as essential constituents, the alkali metal silicate has a molar ratio of silicon oxide to metal oxide of 1.0-2.2, and the two components are mixed at a weight ratio of powder to liquid component of 0.5-2 to form a paste, from which a foam body having a bulk density less than 0.7 g/cm3 is then formed in an exothermic reaction in less than 10 minutes.