Water-containing, hardenable foam compositions with inorganic components and process for their preparation

US5312486A · kind A · utility

Inventors

• Frank Meyer · Essen, DE
• Hans Mehesch · Essen, DE
• Wolfgang Cornely · Gladbeck, DE
• Martin Fischer · Ludwigshafen, DE
• Birgit Riecks · Essen, DE
• Karlheinz Neuschaffer · Leichlingen, DE

Key dates

• Filing date: Mar 23, 1992
• Grant date: May 17, 1994
• Expiry date: Mar 23, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/91
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Hardenable foam compositions comprising oxygen-releasing foaming agents, a hardener consisting of an alkali silicate solution, a fine particle solid material which reacts with said hardener, namely an oxide mixture consisting of SiO.sub.2 and Al.sub.2 O.sub.3 extracted from a filter dust, an electrofilter ash from high-temperature power plants, and calcinated bauxite or amorphous silica, to which reaction accelerators are added, are improved, firmer, faster hardening foams. Reducing agents, in particular sulphur compounds with a reducing action are preferred. Oxidizing agents or fine particle substances such as soot or color pigments are effective.