Lufenuron-containing aqueous emulsion and preparation method thereof
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A technology of emulsion in water and lufenuron, applied in the field of emulsion in water containing lufenuron and its preparation
Active Publication Date: 2010-04-28
SHENZHEN NOPOSION AGROCHEM
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At present, there is no report on the compound pesticide water emulsion of lufenuron, imidacloprid or acetamiprid or lambda-cyhalothrin or lambda-cypermethrin or chlorpyrifos
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[0044] The present invention also provides a preparation method of an emulsion in water containing lufenuron, comprising the following steps:
[0045] (1) Active ingredient A and active ingredient B are dissolved in a solvent, with or without an emulsifier with an HLB value of 5-7, and uniformly mixed to obtain an oil phase;
[0046] Mix an emulsifier with an HLB value > 10 with water, with or without adding antifreeze, defoamer, thickener, and antifungal agent, and mix evenly to obtain a water phase;
[0047] (2) Under high shear, the oil phase is added to the water phase or the water phase is added to the oil phase to obtain a water emulsion.
[0048] If the above-mentioned oil phase is added to the water phase, the high shear speed is 5000-10000 rpm, if the water phase is added to the oil phase, the high shear speed is 4000-10000 rpm, and the particle size can be obtained at 0.2 ~10 micron products.
[0049] The above-mentioned emulsifiers with an HLB value of 5-7, such a...
Embodiment 1
[0052] Table 1.20% Lufenuron·Imidacloprid Emulsion Formula (100g)
[0053]
[0054]
[0055] The oil phase was added to the water phase under high shear (5000-10000 rpm) to obtain sample 1a; conversely, the water phase was added to the oil phase under high shear (4000-10000 rpm) to obtain sample 1b.
Embodiment 2
[0057] Table 2.40% Lufenuron·Imidacloprid Emulsion Formula (100g)
[0058]
[0059] The oil phase was added to the water phase under high shear (5000-10000 rpm) to obtain sample 2a; conversely, the water phase was added to the oil phase under high shear (4000-10000 rpm) to obtain sample 2b.
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Abstract
The invention provides a lufenuron-containing aqueous emulsion and a preparation method thereof. The aqueous emulsion mainly comprises an active component A, an active component B, solvent, emulsifier and water, wherein the active component A is lufenuron; the active component B is imidacloprid, acetamiprid, lambda-Cyhalothrin, beta-cypermethrin or chlorpyrifos; the solvent is one or more of aromatic hydrocarbons, alkyl phthalate esters, alkylene carbonic esters, ionic liquids and N-alkyl pyrrolidones; and the emulsifier is one of mixture of anionic and nonionic surfactants. The preparation method comprises: (1) preparing an oil phase and an aqueous phase; and (2) adding the oil phase to the aqueous phase or adding the aqueous phase to the oil phase under a high-shear condition so as to obtain the aqueous emulsion. The lufenuron-containing aqueous emulsion has the advantages of high stability and small particle size.
Description
technical field [0001] The invention belongs to the field of pesticide preparations, in particular to an emulsion in water containing lufenuron and a preparation method thereof. Background technique [0002] Lufenuron (Lufenuron) is a new type of benzoylurea insecticide and acaricide developed by Syngenta, Switzerland, and its chemical name is RS)-1-[2,5-dichloro-4-(1 , 1,2,3,3,3-hexafluoropropoxy)phenyl]-3-(2,6-difluorobenzoyl)urea. This is an insect growth regulator with chitin synthesis inhibitory effect. It has a unique insecticidal mechanism and kills pests by acting on insect larvae and preventing the moulting process. Lufenuron is mainly used to control pests such as diamondback moth, bean pod borer, thrips, swallow caterpillar, cotton bollworm, etc. It is safe for crops, and can be used for crops such as corn, vegetables, citrus, cotton, potatoes, grapes, soybeans, etc. Its advantages are: It can control pests resistant to synthetic pyrethrins and organophosphorus ...
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