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介绍了农药水悬浮剂的性质、发展与制备方法。采用优化组合法对几种阴离子表面活性剂、非离子表面活性剂及它们的复配体系进行筛选,对250 g/L莠去津·40g/L甲基磺草酮水悬浮剂的配方进行研究,确定了农药水悬浮剂的最佳配方:分散剂选用摩尔比为9:1的SD-815与NP-10复配表面活性剂,总添加量为3%。抗沉降剂选用黄原胶与硅酸镁铝,添加量分别为0.5%与0.25%。防冻剂选用乙二醇,添加量为4%。试验结果标明:热贮14 d后,该产品在在标准硬水和3倍硬水中悬浮率均大于90%,其他各项指标均达到要求。
The properties, development and preparation methods of pesticide aqueous suspensions are introduced. Several anionic surfactant, non-ionic surfactant and their compounding system were screened by optimized combination method. The formulation of 250 g / L atrazine · 40 g / L mesotrione aqueous suspension was studied , The optimum formula of pesticide aqueous suspending agent was determined: SD-815 and NP-10 complexing agent with 9: 1 molar ratio were selected as dispersant, the total amount of which was 3%. Anti-settling agent selection of xanthan gum and magnesium aluminum silicate, the addition of 0.5% and 0.25% respectively. Antifreeze selection of ethylene glycol, the amount of 4%. The test results show that after 14 days of heat storage, the product suspension rate is more than 90% in standard hard water and 3 times hard water, and other indexes meet the requirements.