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High-weatherability fipronil suspending agent and preparation method thereof

A fipronil and weather-resistant technology, applied in the field of pesticide formulations, can solve the problems of lack of sustained-release effect, large loss of original drug, easy sedimentation, etc. Effect

Inactive Publication Date: 2018-05-29
JIANGSU TUOQIU AGRI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing fipronil suspending agent has long stability, and it is prone to sedimentation after a period of storage. At the same time, it has no slow-release effect, poor weather resistance, large loss of original drug after rain washing, and low efficacy

Method used

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  • High-weatherability fipronil suspending agent and preparation method thereof
  • High-weatherability fipronil suspending agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Dissolve 20g of fipronil in 300g of acetone and set aside;

[0033] (2) Heat 1g of sodium dodecylbenzenesulfonate, 6g of β-cyclodextrin and 40g of water to 45°C and stir for 0.5 hours to form a transparent homogeneous system for use;

[0034] (3) Slowly add 200g of fipronil-acetone solution dropwise to 40g of the transparent liquid obtained in step (2) at 45°C, stir for half an hour, distill under reduced pressure to remove the solvent, and dry the residue in vacuum, grind , 22.3g of fipronil sustained-release agent was obtained through a 80-mesh sieve.

[0035] (4) 20g fipronil slow-release agent obtained in step (3), 8g propylene glycol, 3g dodecylphenol polyoxyethylene ether, 2g polyoxyethylene polyoxypropylene pentaerythritol ether, 4g sodium hexametaphosphate, 1g ethylene glycol The alcohol butyl ether and 70g of water are stirred and mixed evenly to obtain the highly weather-resistant fipronil suspension concentrate.

Embodiment 2

[0037] (1) Dissolve 20g of fipronil in 200g of acetone and set aside;

[0038] (2) Heat 1g of sodium dodecylbenzenesulfonate, 7g of β-cyclodextrin and 50g of water to 40°C and stir for 1 hour to form a transparent homogeneous system for use;

[0039] (3) Slowly add 120g of fipronil-acetone solution dropwise to 40g of the transparent liquid obtained in step (2) at 45°C, stir for half an hour, distill under reduced pressure to remove the solvent, and dry the residue under vacuum, then grind , 17.8g of fipronil sustained-release agent was obtained through a 80-mesh sieve.

[0040] (4) Stir and mix 17g fipronil sustained-release agent obtained in step (3), 90g propylene glycol, 4g monoglyceride laurate, 3g polyoxypropylene glyceryl ether, 2g sodium tripolyphosphate, 2g propylene glycol butyl ether and 65g water , that is, high weather resistance fipronil suspending agent.

Embodiment 3

[0042] (1) Dissolve 20g of fipronil in 400g of acetone and set aside;

[0043] (2) Heat 1g of sodium dodecylbenzenesulfonate, 5g of β-cyclodextrin and 30g of water to 50°C and stir for 0.8 hours to form a transparent homogeneous system for use;

[0044] (3) Slowly add 160g of fipronil-acetone solution dropwise to 40g of the transparent liquid obtained in step (2) at 50°C, stir for half an hour, distill under reduced pressure to remove the solvent, and dry the residue under vacuum, then grind , 15.2 g of fipronil sustained-release preparation was obtained through a 80-mesh sieve.

[0045] (4) 15g fipronil sustained-release agent obtained in step (3), 80g propylene glycol, 5g lauryl polyoxyethylene ether, 1g polyoxypropylene polyoxyethylene glyceryl ether, 3g sodium pyrophosphate, 3g butyl glycol Stir and mix ether acetate and 60 g of water evenly to obtain a highly weather-resistant fipronil suspension.

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Abstract

The invention provides a high-weatherability fipronil suspending agent. The high-weatherability fipronil suspending agent is prepared from the following components in parts by weight: 15-20 parts of fipronil sustained-release agent, 80-90 parts of propanediol, 3-5 parts of emulsifier, 1-3 parts of defoaming agent, 2-4 parts of stabilizer, 1-3 parts of anti-freezing agent and 60-70 parts of water;the preparation method of the fipronil sustained-release agent is as follows: dissolving fipronil in acetone for later use; (2) heating sodium dodecyl benzene sulfonate, beta-cyclodextrin and the water to 40-50 DEG C, and stirring for 0.5-1 hour to form a transparent homogeneous system for later use; (3) dropwise adding the fipronil-acetone solution obtained in the step (1) in the transparent solution obtained in the step (2) slowly, stirring for half-hour, reducing pressure and distilling to perform desolvation, drying the residue in vacuum, grinding, and screening through a 80-mesh sieve toobtain the fipronil sustained-release agent. The fipronil suspending agent provided by the invention is high in storage stability, good in weatherability, durable in pesticide effect, and resistant inrain wash.

Description

technical field [0001] The invention belongs to the technical field of pesticide preparations, in particular to a fipronil suspension, in particular to a highly weather-resistant fipronil suspension and a preparation method thereof. Background technique [0002] Fipronil was developed by the French Rhone-Planck company from 1987 to 1989 and registered in my country in 1992. After years of development, it has developed into a highly effective insecticide that has attracted much attention. Fipronil interferes with the pathway of chloride ions through GABA-mediated chloride channels, disrupting normal central nervous system activity and causing death in individuals at sufficient doses. Because of this unique mechanism of action, fipronil has significant characteristics different from conventional insecticides. A large number of test results have proved that the insecticide is resistant to pests including Hemiptera, Lepidoptera, Thysanoptera, Coleoptera, etc., as well as to cyc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N47/02A01N25/04A01P7/04
CPCA01N47/02A01N25/04
Inventor 廖大章廖大泉孙伯文姚舜华
Owner JIANGSU TUOQIU AGRI CHEM CO LTD
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