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Polymer chemical slow release fungicide contg hymexazol active component

A polymer type, fungicide technology, applied in biocides, animal repellents, plant growth regulators, etc., can solve problems such as uneconomical, and achieve the effects of less application times, longer duration of effect, and stable pharmaceuticals

Inactive Publication Date: 2003-05-28
中国中化股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, from the point of view of saving labor, the method of repeated application is very uneconomical

Method used

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  • Polymer chemical slow release fungicide contg hymexazol active component

Examples

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Effect test

example 1

[0029] Example 1 Synthesis of 2-[3'-(5'-methylisoxazolyl)]oxyacetic acid

[0030]Drop into 15 grams (0.1500 moles) of 3-hydroxyl-5-methyl-isoxazole (that is: hymexazol) and 50 ml of water, start stirring, heat up to 60°C, add 50% sodium hydroxide solution to adjust the pH to 8-9, feed nitrogen, heat up to 95°C, add dropwise 21.5 g of chloroacetic acid (0.2250 moles), 9.5 g of hydrogen Sodium oxide (0.2260 mole) and the solution that 40 milliliters of water are made into, add in 20~30 minutes, keep warm and reflux for 4~5 hours to the end of reaction. Then cool down to 75-80°C, add 10% hydrochloric acid dropwise to adjust the pH value to 1-2, stir for 30 minutes, add 100 ml of toluene, continue stirring for 30 minutes, pour it into a separatory funnel while it is hot, and separate the water phase. After distilling off the toluene, 11.3 g of a light yellow solid was obtained, which was the product, with a purity of 95% and a yield of 48%. After methanol recrystallization, the ...

example 2

[0031] Example 2 Synthesis of 3-(3'-isocyanato-4'-methylanilinocarbonyl)oxy-5-methyl-isoxazole

[0032] Drop into 36.2 grams (0.2000 moles) of toluene-2,4-diisocyanate, catalyst and 50 milliliters of 1,2-dichloro Ethane, start stirring, feed nitrogen, heat up to 75-80°C, add dropwise 10 g (0.1000 mol) of 3-hydroxy-5-methyl-isoxazole (ie: hymexazol) and 50 ml of 1, Add the solution made of 2-dichloroethane in 45-60 minutes, keep warm and reflux for 9 hours to the end of the reaction. Cool down to room temperature, let stand for 24 hours, filter, rinse the filter cake with 10 ml of dry 1,2-dichloroethane, and vacuum dry the filter cake to obtain 22.3 g of white powder with a purity of 90.2% and a yield of 82%. After recrystallization from dried chloroform, white needle-like crystals were obtained, with a purity of 99.5%, and a melting point of 129-131°C; 1 H NMR (CDCl 3 )δ H : 2.27 (3H, s, 5-CH 3 ), 2.36 (3H, s, 4'-CH 3 ), 5.56(1H, s, 4-H), 6.99~7.91(3H, m, 2', 5', 6'-H), ...

example 3

[0033] Example 3 Synthesis of styrene-maleic anhydride alternating copolymer

[0034] 10.5 grams (0.1000 moles) of styrene, 9.9 grams (0.1000 moles) of maleic anhydride and 120 milliliters of toluene were dropped into a 250 milliliter three-neck flask equipped with stirring, a thermometer and a reflux condenser, and the temperature was raised to 75 ~80°C, add dropwise a solution made of 0.1g of benzoyl peroxide and 10ml of toluene, add it in about 15 minutes, keep it warm at 85~90°C for 4~5 hours, cool down to room temperature, filter, and use 50 The filter cake was rinsed three times with milliliter of toluene, and after the filter cake was dried, 20.0 g of polymer (I) was obtained as a white powder, with a yield of 98%.

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Abstract

A high-molecular slow-release chemical disinfectant containing hymexazol as active component is prepared by linking hymexazol to high-molecular carrier, and its features are that said disinfectant itself does not show disinfecting activity, but can release enough hymexazol under its application environment where its chemical bond is broken off.

Description

technical field [0001] The invention belongs to the field of agricultural chemicals. [0002] The invention relates to a polymer type chemical slow-release bactericide, a preparation method and application thereof. Background technique [0003] There have been reports on the development of high-molecular-type chemical slow-release pesticides abroad. For example, high-molecular-type controlled-release pesticides and their synthesis methods are discussed in US4267280 and US4267281, but the pesticide molecules used are 4-amino-6-tert-butyl-3 -(methylthio)-as-triazin-5(4H)one, the bridging agent used is multi-substituted isocyanate, and the polymer used is polyvinyl alcohol. In US4225693, polymer controlled-release pesticides and their synthesis methods are discussed, and it is mentioned that pesticides 2,4-D (2,4-dichlorophenoxyacetic acid) are made into polymerizable monomers, and then polymerized into polymers Type controlled release pesticides, can be used for insecticide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/10
Inventor 刘冬雪台立民魏峰王新吴玉春刘博旋咏梅张晓燕王炳帅李建华谭波
Owner 中国中化股份有限公司
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