丙烯酸-马来酸酐共聚物的合成及助洗性能

Synthesis and Builder Properties of Acrylic Acid-Maleic Anhydride Copolymer

以水为溶剂合成 AA—MA 共聚物的较佳条件是:n(MA):n(AA)=1:3.5,反应温度为80～85℃,过硫酸铵用量为单体质量的6.67%,丙烯酸和过硫酸铵的滴加时间约为2.5 h,保温时间为3.5 h。与三聚磷酸钠(STPP)相比,丙烯酸-马来酸酐共聚物具有很好的螯和钙的能力、pH 缓冲能力、分散能力、去污力和抗沉积能力。AA—MA 聚合物钠盐具有较高的表面活性,并且与LAS 有良好的协同作用。

The optimum conditions for synthesizing acrylic acid - maleic anhydride copolymer （ AA - MA ） using water as solvent were as follows： n （MA） ： n （AA） = 1 ： 3.5, reaction temperature 80 - 85 ℃, dosage of ammonium persulfate 6.67% （based on the weight of monomers） ,the dripping time of acrylic acid and ammonium persulfate 2. 5 h, time of the heat preservation reaction 3.5 h. Compared with STPP, AA - MA had better Ca^2＋ chelating and pH buffering ability, dispersibility, detergency and anti - sediment ability. AA - MA copolymer also had higher surface activity and better synergism with LAS.