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以马来酸酐(MA)和聚乙二醇200(PEG200)为原料,通过酯化反应制得大分子马来酸聚乙二醇酯(MAPEG),再与丙烯酸(AA)、甲基丙烯酸甲酯(MMA)通过自由基聚合反应制得3种梳型聚羧酸盐分散剂,研究了不同单体比例的聚合物分散剂在600 g/L吡虫啉水悬浮剂中的流点、粘度和Zeta电位.结果表明,当单体摩尔比MAPEG:AA:MMA为1:8:2、共聚物分散剂添加量为6%(ω)时,悬浮液粘度最小,为600 MPa·s,热贮前后悬浮率分别为93.7%±0.22%和92.3%±0.12%,粒径分别为3.26和3.88μm,分散效果与市售同类产品亨斯迈2500相当.
Maleic anhydride (MA) and polyethylene glycol 200 (PEG200) as raw materials, by esterification of macromolecular maleic acid polyethylene glycol ester (MAPEG), and then with acrylic acid (AA), methyl methacrylate (MMA) were prepared by free radical polymerization of three polycarboxylate dispersants were studied, the different monomer ratio of polymeric dispersant in 600 g / L imidacloprid suspension, flow point, viscosity and Zeta The results showed that when the monomer molar ratio MAPEG: AA: MMA was 1: 8: 2 and the amount of copolymer dispersant was 6% (ω), the viscosity of suspension was the lowest, 600 MPa · s, The suspension rates were 93.7% ± 0.22% and 92.3% ± 0.12%, respectively, with particle sizes of 3.26 and 3.88μm, respectively. The dispersion effect was similar to that of the similar Huntsman 2500 in the market.