The invention relates to a dispersant comprising a polymer obtainable by copolymerization of monomers including 5 to 80 mol % of a hydroxyalkyl acrylate phosphate and/or hydroxyalkylacrylamide phosphate (monomer 1), 0 to 20 mol % of a di(hydroxyalkyl acrylate) phosphate and/or di(hydroxyalkylacrylamide) phosphate (monomer 2) and 1 to 80 mol % of a polyalkylene glycol-containing macromonomer comprising an alkene group (monomer 3). Further disclosed is a process for preparing the polymers of the invention and the use thereof as dispersants in calcium sulphate-containing compositions. A further aspect of the invention is a process for producing shaped gypsum bodies, and also shaped gypsum bodies, more particularly gypsum plasterboards and self-levelling screeds, comprising the dispersant of the invention.
本发明涉及一种分散剂,包括通过共聚合单体得到的聚合物,其中单体包括5至80摩尔%的羟基烷基
丙酸酯
磷酸酯和/或羟基烷基丙酰胺
磷酸酯(单体1),0至20摩尔%的二(羟基烷基
丙酸酯)
磷酸酯和/或二(羟基烷基丙酰胺)
磷酸酯(单体2),以及1至80摩尔%的含有聚烷基
乙二醇的大分子单体,包括烯烃基(单体3)。本发明还公开了制备所述聚合物的方法以及将其用作含
硫酸钙组分中的分散剂的用途。本发明的另一个方面是制备成型
石膏体的方法,以及包括本发明的分散剂的成型
石膏体,更具体地说是
石膏石膏板和自流平砂浆。