Process for the preparation of expanded, amorphous, non-flammable insulating material

摘要

A method of producing foamed, amorphous and non-flammable insulating materials, characterized in that the foaming is performed through subjecting a material to the flow of electrical current in order to increase the temperature of the material to a temperature required for foaming, whereas the foamed material is a granulate based on colloidal silica with a grain size from 1 to 20 mm with an addition of a foaming agent and water.