The Research And Preparation Methods Of Water Emulsions For Pesticides

With the advancement of technology, improvement of living standards, increasing of the public’s education level, people concerned more about the protection of the environment, their own health, and food security. Pesticides cost the media attention, since it is the basic elements of agricultural, an important and indispensable part of environmental protection. Preparation as the key to pesticide application, directly or indirectly affect the safety of pesticides. The key issues for the preparation workers and researchers will be processed as creating non-toxic pesticide, harmless, pollution-free environment-friendly agents in recent years. The water-based formulations due to their low flash point, low cost, no damage to the environment, it takes a role to replace an integral part of EC.This paper focuses on water emulsion research and development.1, research and development of the more difficult water emulsion prepared: 25% EW TebuconazoleOverview of pesticide water emulsion: (1) the physical characteristics of pesticide water emulsion. Briefly introduced the concept of pesticide water emulsion:Appearance, size, physical stability, conductivity and so on. (2) The advantage of pesticide water emulsion. Infiltration from the solubilization, high transmission efficiency, safety, application of stability, good market competitiveness, and so to show the advantage of water emulsion, compared with the other emulsions. (3) Pesticide water emulsion composition and preparation methods. (4) Discusses the mechanism of pesticide water emulsion stability: Two-interface film theory; orientation Figure theory; phase volume theory; coalescence rate theory.2, Pesticide formulations development process: explain the definition of green pesticides, introduced a consistent definition of green pesticides several agents: micro-emulsion, water emulsion, solid cream, suspensions, micro-capsules, effervescent agent definition main characteristics, preparation methods and common varieties.3 To discuss the HLB value for the preparation of pesticides EW: HLB value of the concept, basic performance, application performance, HLB value determination, HLB value in the application of pesticide preparations. And, according to HLB value of emulsifiers the choice of pesticide and surfactant synergy.