30%三唑磷微乳剂的制备

以起始外观、冷藏[(0±2)℃,7 d]外观、热贮[(54±2)℃,14 d]外观和/或稀释稳定性(1∶200倍液)合格和/或流动性好为标准,考察了不同表面活性剂、助剂、助溶剂、水的用量等对30%三唑磷微乳剂性能的影响。结果表明,优化的配方为:三唑磷30%,丁醇1%~3%,二甲苯3%~5%,二甲基甲酰胺3%~5%,乳化剂(500#、NPE-PO4、1602#和400#按一定比例混合)17%~20%,水余量。该微乳剂贮藏稳定性良好,平均分解率为2%;田间药效试验显示,在有效成分浓度相同时,30%三唑磷微乳剂药效好于40%三唑磷乳油,但两者差异性不显著,前者的工厂成本比后者低。

Study on 30% triazophos microemulsion

According to the standard appearance of initial preparation cold storage [(0±2) ℃,7 d],heat storage [54(±2) ℃,14 d] and/or qualified dilution stability(1 ∶200 fluid) and/or good mobility,we have carried out the screening tests recipes of 30% triazophos fenvalerate microemulsion using different surfactants,solvents,co-solvents and water.The result shows that optimized formula:triazophos is 30%;butyl alcohol is 1%~3%;xylene is 3%~5%;DMF is 3%~5%;emulsifier(500#,NPEPO4,1602# and 400#) is 17%~20% and water else.The microemulsion has good dilution stability,average decomposition ratio 2%;the influence of field conditions is 30% triazophos microemulsion better than 40% triazophos EC,but the difference between two emulsifiers is not remarkable,the cost of 30% triazophos microemulsion is lower than 40% triazophos EC.