Process for the production of inorganic-organic synthetic foam materials

Claim 1

A process for the production of inorganic-organic synthetic foam materials having high strength, elasticity, dimensional stability under heat, and flame resistance, consisting of a polymer-polysilicic acid gel composite material in the form of a solid/solid xerosol, said process comprising mixing (a) an organic polyisocyanate, (b) an aqueous basic solution and/or an aqueous basic suspension having an inorganic solid content of from 20 to 80% by weight, preferably from 30 to 70% by weight, (c) an organic compound containing at least one isocyanate reactive hydrogen atom and at least one non-ionic-hydrophilic group and (d) optionally catalysts and other additives and leaving the resulting mixture to react, characterized in that components (a) and (b), optionally with the addition of part or all of component (d) are first mixed together to form a stable primary dispersion and thereafter component (c), optionally with the addition of all or part of component (d), is added to form the final dispersion which is allowed to foam.