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Soluble liquid of thiazophosphine for killing nematodes and its preparation method

A thiazophosphine and soluble technology, applied in the field of thiazophosphine soluble liquid preparation and its preparation, can solve the problems of high packaging and transportation costs, low content of active ingredients, etc., and achieve excellent stability, less packaging usage, and high dispersibility. Effect

Active Publication Date: 2017-04-12
HENAN YUNNONG PLANT PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently commercialized thiazophosphine preparations mainly include: granules, emulsifiable concentrates, emulsions in water, and microcapsule suspensions. However, these existing formulations all have problems such as low content of active ingredients, high packaging and transportation costs, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A thiazophosphine soluble liquid for nematicides, every 100L includes 97.96Kg of 98wt% thiazophosphine, the balance is acrylic acid-maleic anhydride copolymer sodium salt (monomer molar ratio 1:1), methacrylic acid- Methacrylate copolymer (produced by Rhodia Fine Chemical Additives (Qingdao) Co., Ltd., monomer molar ratio 1:1), ethoxylated sorbitan ester, triglyceride, weight ratio 4:3:0.8 : 0.4.

[0023] Its preparation method comprises the following steps:

[0024] (1) Increase the content of commercially available 90wt% thiazole phosphine raw materials to 98wt% by means of instantaneous high-temperature and reduced-pressure distillation; The heat-conducting oil furnace heats the evaporator to 120°C, and then continues to feed the material. The evaporation time does not exceed 1 second, and distillation and purification are carried out;

[0025] Preparation of sodium salt of acrylic acid-maleic anhydride copolymer: add appropriate amount of water and maleic anhydrid...

Embodiment 2

[0030] A thiazophosphine soluble liquid for killing nematodes, every 100L includes 103Kg of 93wt% thiazophosphine, the balance is acrylic acid-maleic anhydride copolymer sodium salt (mole ratio of raw material monomers 1:1), methacrylic acid- Methacrylate copolymer (produced by Rhodia Fine Chemical Additives (Qingdao) Co., Ltd., monomer molar ratio 1:1), ethoxylated sorbitan ester, triglyceride, weight ratio 5:2:0.5 : 0.5.

[0031] Its preparation method comprises the following steps:

[0032] (1) Increase the content of commercially available 85wt% thiazole phosphine raw materials to 93wt% by means of instantaneous high-temperature and reduced-pressure distillation; The heat-conducting oil furnace heats the evaporator to 130°C, and then continues to feed the material. The evaporation time does not exceed 1 second, and distillation and purification are carried out:

[0033] (2) Acrylic acid-maleic anhydride copolymer sodium salt, methacrylic acid-methacrylate copolymer, etho...

Embodiment 3

[0037] A kind of thiazophosphine soluble liquid for killing nematodes, every 100L includes 100Kg of 98wt% thiazophosphine, the balance is acrylic acid-maleic anhydride copolymer sodium salt (monomer raw material molar ratio 1:1), methacrylic acid- Methacrylate copolymer (produced by Rhodia Fine Chemical Additives (Qingdao) Co., Ltd., monomer molar ratio 1:1), ethoxylated sorbitan ester, triglyceride, weight ratio 3:4:1 : 0.3.

[0038] Its preparation method comprises the following steps:

[0039] (1) Increase the content of commercially available 90wt% thiazole phosphine raw materials to 98wt% by means of instantaneous high-temperature and reduced-pressure distillation; The heat-conducting oil furnace heats the evaporator to 110°C, and then continues to feed the material. The evaporation time does not exceed 1 second, and distillation and purification are carried out:

[0040] (2) Acrylic acid-maleic anhydride copolymer sodium salt, methacrylic acid-methacrylate copolymer, e...

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PUM

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Abstract

The invention relates to a fosthiazate soluble liquid formulation for killing nematode and a preparation method thereof. Every 100L of the fosthiazate soluble liquid formulation comprises 96-103Kg of 93-99.9wt% fosthiazate, and the balance being acrylic acid-maleic anhydride copolymer sodium salt, methacrylic acid-metacrylic acid ester copolymer, ethoxylated polyoxyethylene sorbitan fatty acid ester and triglyceride, and the weight ratio is (3-5):(2-4):(1-0.5):(0.5-0.3), and the preparation method comprises: instant high temperature underpressure distillation, auxiliary agent preparation, volumetric flask preparation, and other steps. The soluble liquid formulation provided by the invention is the preparation contains highest active ingredient content of fosthiazate at present, and the effective component content reaches to 960g / L or higher; the invention has the advantages of small package application amount, low transport cost, high cost performance, friendly to environment without any difficultly decomposed organic solvents and excellent stability, and the disadvantage that common fosthiazate formulation is not stable is overcome.

Description

technical field [0001] The invention belongs to the field of pesticides, and in particular relates to a thiazophosphine soluble liquid used for killing nematodes and a preparation method thereof. Background technique [0002] Thiazophosphine is a new type, high-efficiency, broad-spectrum non-fumigation organophosphorus insecticide and nematicide developed by Ishihara Corporation of Japan. It is one of the excellent varieties replacing high-toxic and high-risk nematicide pesticides. country on the market. Preliminary studies have shown that thiazophos has a systemic transport effect in plants and has broad-spectrum activity against plant parasitic nematodes and other pests. Plant parasitic nematodes harm many important crops, and the biological and physical and chemical properties of thiazophosphine are very suitable for soil surface application, so it has become an ideal agent for controlling plant parasitic nematodes. Currently commercialized thiazophosphine preparations ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N57/32A01N25/02A01N25/22A01P5/00
Inventor 吴静
Owner HENAN YUNNONG PLANT PROTECTION TECH CO LTD