Abstract: A building material mixture for use in manual plasters, gun plasters and knifing fillers having reduced stickiness comprises at least one inorganic binder and a cellulose ether which has been treated with a hydrophobicizing agent.

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, comprisinga) 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 ande) 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.

Abstract: Thickening systems for water-based building material mixes, composed of 0.01 to 2% by weight of a water-soluble cellulose ether, 0.01 to 2% by weight of polyvinyl alcohol and 0.005 to 1% by weight of boric acid or salts thereof, the respective percentages being based on the dry substance content of the building material mix.Due to the addition of boric acid or borax, these thickening systems have an improved thickening action compared with thickening mixtures composed only of cellulose ether and polyvinyl alcohol.