Microcapsule aqueous suspension of phytocide clomazone and method of producing the same

The technology of clomazone and microcapsules is applied in herbicides and algaecides, botanical equipment and methods, biocides, etc., and can solve the problems of wall material not easily degradable, harming adjacent sensitive crops, complicated preparation process, etc. Achieve the effect of reducing pesticide loss and decomposition, improving pesticide stability, and simple preparation process

Inactive Publication Date: 2009-05-13
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0003] ① Contains a large amount of organic solvents, such as toluene, xylene, etc., the discharge of which not only causes waste of resources, but also seriously pollutes the ecological environment;
[0004] ② Clomazone has a relatively high vapor pressure, is volatile, and has a low utilization rate, resulting in a large amount of pesticides and high costs;
[0005] ③It is easy to drift and harm adjacent sensitive crops. The drift of clomazone mist or steam can cause phytotoxicity to sensitive plants. In order to avoid the harm of dr

Method used

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  • Microcapsule aqueous suspension of phytocide clomazone and method of producing the same

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Embodiment 1

[0042] The preparation method of embodiment 1-embodiment 5 is carried out according to the following step sequence:

[0043] a. Preparation of emulsion: Take sodium carboxymethylcellulose and gum arabic, add appropriate amount of deionized water, dissolve, add clomazone, emulsifier, antifoam agent, and emulsify homogeneously at a speed of 3000-10000r / min for 5 -30min, get stable oil-in-water emulsion A;

[0044] b. Complex coacervation: take gelatin, add an appropriate amount of deionized water to dissolve, and obtain aqueous solution B, mix B and A evenly, and adjust the pH value of the mixture of B and A to 3-4.5 with 10% acetic acid at a temperature of 35-55°C. React at constant temperature for 40-60min to form reactant C;

[0045] c. Curing: Cool the reactant C to a temperature of 0-5°C, adjust the pH value to 8-10 with 20% sodium hydroxide solution, add a curing agent, and cure for 40-60 minutes; the temperature rise rate is slow at 1°C per minute Raise the temperature ...

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Abstract

The invention discloses a microcapsul water suspension agent of herbicide clomazone and preparation method thereof. The slow-release microcapsule water suspension agent uses the clomazone as core material by complex coacervation method and uses the sodium cellulose glycolate, gelatin and arabic gum as wall material with particle diameter of 0.1-10micron. The capsule wall material is non-poisonous and biological degradable. The microcapsule water suspension agent has features of high stabilization, slow-release of effective component, deviation prevention, super efficiency, low toxicity, economy, safety. The microcapsule can be widely used for preventing and controlling the broad leaved weed and gramineous weed in crops field such as soya, cassava, corn, rape, sugar cane and tobacco.

Description

technical field [0001] The invention relates to a herbicide microcapsule and a preparation method thereof, in particular to a herbicide clomazone with clomazone as the core material, carboxymethyl cellulose sodium, acacia gum and gelatin as the wall materials A microcapsule aqueous suspension of oxazone and a preparation method thereof. Background technique [0002] Clomazone, trade name clomazone, chemical name 2-(2-chlorophenyl)methyl-4,4-dimethyl-3-isoxazolone, belongs to isoxazoline Ketone herbicides can control barnyardgrass, foxtail, crabgrass, solanum nigrum, cypress, water spiny needles, blueberry, willow-leaved Polygonum, Annual gramineous and broad-leaved weeds such as cocklebur, quinoa, wild watermelon seedlings, and wolfberry have a strong inhibitory effect on perennial thorns, thistles, thorns, and lettuce. The existing formulations of herbicides with clomazone as an active ingredient are mainly emulsifiable concentrate preparations, which have the following d...

Claims

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Application Information

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IPC IPC(8): A01N25/28A01N25/04A01N43/80A01P13/00
Inventor 葛艳蕊冯薇张林雅张淑琴
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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