Use of a flow agent based on polycarboxylate for anhydrite-based flow screed, where the polycarboxylate component is based on a water-soluble, branched-chain and carboxyl group containing copolymer

摘要

Use of a flow agent based on polycarboxylate for anhydrite-based flow screed, where the polycarboxylate component is based on a water-soluble, branched-chain and carboxyl group containing copolymer, where at least one of the structural criteria is from an array of nitrogen functionalized side chain and the unit between the main- and the side chain shows an ester compound, ether compound and amide- and/or imide compound. Use of a flow agent based on polycarboxylate for anhydrite-based flow screed, where the polycarboxylate component is based on a water-soluble, branched-chain and carboxyl group containing copolymer, where at least one of the structural criteria is from an array of nitrogen functionalized side chain and the unit between the main- and the side chain shows an ester compound, ether compound and amide- and/or imide compound; where in the polycarboxylate component the molar ratio of an acid group to sub-group carrying monomer is = 2:1 and/or the side chain length is less than 25, and the sulfate content of the flow screed is = 0.5 wt.%, based on the total weight of the anhydrite parts.