Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Carbosulfan microcapsule suspending agent and preparation method thereof

A technology of microcapsule suspension and carbosulfan, applied in botany equipment and methods, insecticides, acaricides, etc., can solve the problems of destroying the stability of microcapsules and the toxic effect of the environment, and achieve reduction Free formaldehyde and urea content, improved safety, and low production cost

Inactive Publication Date: 2011-10-12
CHINA AGRI UNIV
View PDF8 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this reaction process is likely to cause the decomposition of some acid-unstable pesticides under strong acid and high-temperature heating conditions. At the same time, the preparation of urea-formaldehyde resin prepolymer is a reversible reaction. The presence of free formaldehyde and urea will destroy the stability of the microcapsules and have a toxic effect on the environment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Carbosulfan microcapsule suspending agent and preparation method thereof
  • Carbosulfan microcapsule suspending agent and preparation method thereof
  • Carbosulfan microcapsule suspending agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1: carbosulfan microcapsule suspension

[0053] 1. Preparation method

[0054] 1) Preparation of urea-formaldehyde resin prepolymer: Dissolve 60.0 g of urea in 81.0 g of 37% formaldehyde solution (the urea-formaldehyde molar ratio is 1:1), add 0.3 g of triethanolamine to adjust the pH value to 7.5, and heat up to 80° C. , heat preservation reaction for 1h to obtain urea-formaldehyde resin prepolymer;

[0055] 2) Emulsification: Add 2.0g of emulsifier (1.7g of phenylethylphenol polyoxyethylene polyoxypropylene ether, 0.3g of calcium dodecylbenzenesulfonate) to 5.0g of carbosulfan crude oil, mix well, Then add 30.0g deionized water and stir and emulsify for 30min to obtain O / W emulsion;

[0056] 3) Polymerization: Add 5.0g of urea-formaldehyde resin prepolymer and 1.0g of amino starch dropwise to the O / W emulsion under stirring conditions, adjust the pH value to 3.0 with 3% acetic acid, heat up to 40°C, and keep warm After reacting for 1h, add 0.1g polypropy...

Embodiment 2

[0060] Embodiment 2: carbosulfan microcapsule suspension

[0061] 1. Preparation method

[0062] 1) Preparation of urea-formaldehyde resin prepolymer: Dissolve 60.0g urea in 97.3g mass concentration of 37% formaldehyde solution (urea-formaldehyde molar ratio is 1:1.2), add 0.4g triethanolamine to adjust pH value to 7.8, and heat up to 70°C , heat preservation reaction for 1h to obtain urea-formaldehyde resin prepolymer;

[0063] 2) Emulsification: Add 2.0g of emulsifier (1.7g of phenylethylphenol polyoxyethylene polyoxypropylene ether, 0.3g of calcium dodecylbenzenesulfonate) into 5.0g of carbosulfan, mix well, and then Add 10.0g deionized water and stir and emulsify for 30min to obtain O / W emulsion;

[0064] 3) Polymerization: Add 5.0g of urea-formaldehyde resin prepolymer and 1.0g of amino starch dropwise to the O / W emulsion under stirring conditions, adjust the pH value to 3.0 with oxalic acid with a mass concentration of 3%, raise the temperature to 40°C, and keep warm ...

Embodiment 3

[0068] Embodiment 3: carbosulfan microcapsule suspension

[0069] 1. Preparation method

[0070] 1) Preparation of urea-formaldehyde resin prepolymer: Dissolve 90.0 g of urea in 206.8 g of 37% formaldehyde solution (the urea-formaldehyde molar ratio is 1:1.7), add 0.5 g of triethanolamine to adjust the pH value to 8.5, and heat up to 60°C , heat preservation reaction for 1.5h to obtain urea-formaldehyde resin prepolymer;

[0071] 2) Emulsification: Add 2.0g of emulsifier (1.7g of phenylethylphenol polyoxyethylene polyoxypropylene ether, 0.3g of calcium dodecylbenzenesulfonate) into 5.0g of carbosulfan, mix well, and then Add 15.3g of deionized water and stir and emulsify for 10min to obtain an O / W emulsion;

[0072] 3) Polymerization: Add 5.0 g of urea-formaldehyde resin prepolymer and 5.0 g of amino starch dropwise to the O / W emulsion under stirring conditions, adjust the pH value to 3.0 with phosphoric acid with a mass concentration of 2%, raise the temperature to 40°C, an...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a Carbosulfan microcapsule suspending agent and a preparation method thereof. The Carbosulfan microcapsule suspending agent is prepared from Carbosulfan serving as a capsule core, and a urea-formaldehyde resin prepolymer and amino starch serving as a capsule wall by an in-situ polymerization method. In the preparation method of the Carbosulfan microcapsule suspending agent,the reaction time is shortened by nearly 1 hour and the curing temperature of the capsule wall does not exceed 60 DEG C, so the Carbosulfan is effectively prevented from being decomposed under an acidic condition; and the amino starch is added, so the free formaldehyde content and the urea content of the microcapsule product are reduced and the stability of the product is improved. The Carbosulfan microcapsule suspending agent has the characteristics of high storage stability, sustained release and low toxicity, has a good development and application prospect, and provides reference for the preparation of pesticide microcapsules.

Description

technical field [0001] The invention belongs to the field of novel pesticide preparations, and in particular relates to a carbosulfan microcapsule suspension and a preparation method thereof. Background technique [0002] The trade name of carbosulfan is Haoniandong. It is a low-toxic carbamate pesticide carbofuran. It looks like a yellow oily liquid. Its chemical name is 2,3-dihydro-2,2-dimethyl Benzofuran-7-yl (dibutylaminothio) methyl carbamate, the chemical formula is C 20 h 32 N 2 o 3 S. Its structural formula is shown in Formula 1 below. [0003] [0004] Formula 1 [0005] It interferes with the nervous system of insects, inhibits cholinesterase, and continuously excites the muscles and glands of insects, resulting in the death of insects. The drug is widely used in apples, cabbage, zucchini, rice, citrus and other crops, and can be used to control pests such as aphids, thrips, rice borers, rice planthoppers, mites, and root-knot nematodes. At present, the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): A01N47/24A01N25/04A01P7/04A01P7/02A01P5/00
Inventor 曹永松王芳孙妍何顺敖明鸣
Owner CHINA AGRI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com