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PROCESS FOR PREPARING EMULSIONS OF HERBICIDAL BIPYRIDYLIUM DIQUATERNARY CATIONS
PROCESS FOR PREPARING EMULSIONS OF HERBICIDAL BIPYRIDYLIUM DIQUATERNARY CATIONS
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机译:杀虫剂双季铵盐阳离子乳液的制备方法
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摘要
A process of preparing a herbicidal emulsion comprising 75 grams per litre or more of a salt of a herbicidal bipyridylium diquaternary cation as an active ingredient comprising as a first step agitating an aqueous solution of a herbicidal bipyridylium diquaternary salt with an oil and a first emulsifier having a low HLB value to give a first emulsion comprising droplets of herbicidal bipyridylium diquaternary salt solution dispersed in a continuous oil phase, and as a second step, agitating the first emulsion with water and a second emulsifier having a high HLB value, to give a second emulsion comprising drops of the first emulsion dispersed in a continuous aqueous phase. The emulsions have a lower oral toxicity than conventional aqueous formulations.
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