Patent ID: 7491755

Claim:
Process for the extrusion of mineral masses, comprising admixing 0.1 to 6% by weight of a cellulose ether composition which comprises 90.1 to 99.8% by weight of cellulose ether and 0.2 to 9.9% of a superabsorbent polymer selected from the group consisting of partially neutralized and crosslinked polyacrylic acids, (partially) neutralized starch-acrylic acid graft copolymers, (partially) saponified vinyl acetate-acrylic ester copolymers, and polymers of crosslinked cationic monomers, and optionally other additives with a mineral mixture comprising 20 to 100 parts of mineral binder, 0 to 70 parts of aggregates, 0 to 30 parts of lightweight aggregates, 0 to 20 parts of fibres and optionally other additives, and water, mixing and/or kneading until a homogeneous mass is obtained, and extruding the mass through a die mouth of an extrusion press, with the proviso that the extruded mineral extrusion mass does not comprise a polyacrylamide.