Additive combination for improving the processing properties of water-containing mixtures of building materials

Abstract

Additive combination for improving the processing properties of water-containing mixtures of building materials. The invention relates to an additive combination for water-containing mixtures of building materials, comprising a) at least 65% by weight, preferably 65 to 98% by weight, of a water-soluble cellulose ether or a derivative thereof, b) from 1 to 15% by weight of polyacrylamide, c) from 1 to 20% by weight of an alkali metal salt or ammonium salt of a crosslinked, ungrafted or starch-grafted polyacrylate, d) from 0 to 20% by weight of a starch ether and e) from 0 to 15% by weight of a water-soluble alkali metal salt, alkaline earth metal salt or ammonium salt of an arylsulfonic acid-formaldehyde condensation product or of a sulfonic acid-modified product of the polycondensation of melamine and formaldehyde, and to building material mixtures which contain these additive combinations. The additive combinations according to the invention are suitable for all water-containing mixtures of building materials, in particular for plasters, mortars, adhesive cements and fillers.

Dependencies are inferred from the claim text.