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Double-shell esbiothrin microcapsule as well as preparation method and application thereof

A microcapsule and double-shell technology, which is applied in the field of double-shell pyrethroid microcapsules and its preparation, can solve the problem that the application range is greatly affected by environmental temperature and humidity, the storage of mosquito repellent is unstable, and the long-term effect of mosquito repellent is not enough. and other problems to achieve the effect of ensuring quality stability and storage stability, good mechanical properties, and improving impact resistance and chemical resistance.

Inactive Publication Date: 2019-03-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, permethrin microcapsules generally have the problem of unstable storage for mosquito repellents, the application range is greatly affected by ambient temperature and humidity, pollutes the environment, and has insufficient long-term effectiveness in repelling mosquitoes.

Method used

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  • Double-shell esbiothrin microcapsule as well as preparation method and application thereof
  • Double-shell esbiothrin microcapsule as well as preparation method and application thereof
  • Double-shell esbiothrin microcapsule as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of bivalve permethrin microcapsule of the present embodiment, its raw material formula is as table 1.

[0039] Table 1

[0040]

[0041] The specific preparation process and application steps in coatings are as follows:

[0042] (1) The preparation process of melamine prepolymer: take melamine and formaldehyde solution according to the formula, (add melamine first and then add formaldehyde) and stir and mix in a three-necked flask, add an appropriate amount of pH regulator triethylamine to adjust the pH value of the system to 8 ~9. Heat and stir the mixed solution of melamine and formaldehyde in a water bath at 65°C. After about 10 minutes, the system becomes transparent. Add distilled water of the same quality as the formaldehyde solution, and continue to react for 50 minutes to obtain transparent and low-molecular-weight water-soluble melamine prepolymerization. body.

[0043] (2) The preparation process of melamine resin and polyurea resin double-shell mi...

Embodiment 2

[0047] A kind of bivalve permethrin microcapsule of the present embodiment, its raw material formula is as table 2.

[0048] Table 2

[0049]

[0050] The specific preparation process and application steps in coatings are as follows:

[0051] (1) The preparation process of melamine prepolymer: take melamine and formaldehyde solution according to the formula, (add melamine first and then add formaldehyde) and stir and mix in a three-necked flask, add an appropriate amount of pH regulator triethylamine to adjust the pH value of the system to 8 ~9. Heat and stir the mixed solution of melamine and formaldehyde in a water bath at 65°C. After about 10 minutes, the system becomes transparent. Add distilled water of the same quality as the formaldehyde solution, and continue to react for 50 minutes to obtain transparent and low-molecular-weight water-soluble melamine prepolymerization. body.

[0052] (2) The preparation process of melamine resin and polyurea resin double-shell mi...

Embodiment 3

[0056] A kind of bivalve permethrin microcapsule of the present embodiment, its raw material formula is as table 3.

[0057] table 3

[0058]

[0059]

[0060] The specific preparation process and application steps in coatings are as follows:

[0061] (1) The preparation process of melamine prepolymer: take melamine and formaldehyde solution according to the formula, (add melamine first and then add formaldehyde) and stir and mix in a three-necked flask, add an appropriate amount of pH regulator triethylamine to adjust the pH value of the system to 8 ~9. Heat and stir the mixed solution of melamine and formaldehyde in a water bath at 65°C. After about 10 minutes, the system becomes transparent. Add distilled water of the same quality as the formaldehyde solution, and continue to react for 50 minutes to obtain transparent and low-molecular-weight water-soluble melamine prepolymerization. body.

[0062] (2) The preparation process of melamine resin and polyurea resin dou...

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Abstract

The invention belongs to the field of microcapsule materials and discloses a double-shell esbiothrin microcapsule as well as a preparation method and application thereof. The preparation method comprises the following steps of sequentially adding melamine and a formaldehyde solution in a reactor for uniform stirring and mixing, adding alkaline to regulate a pH value of a system to be 8-9, then performing stirring reaction at 65-70 DEG C until the system becomes transparent, and then adding water for continuous reaction to obtain a melamine prepolymer; and adding the melamine prepolymer, a chain extender and an emulsifier in water for uniform stirring and dissolving, adding acid to regulate the pH value of the system to be 1-6, then adding a homogeneous phase mixture of a curing agent, esbiothrin and a solvent, performing emulsification and stirring reaction, and adding the alkaline to regulate the pH value of the system to be larger than or equal to 6 after reaction is finished to obtain the double-shell esbiothrin microcapsule. The obtained double-shell esbiothrin microcapsule disclosed by the invention has good quality stability and storage stability and has a good application prospect in the field of coatings or other materials.

Description

technical field [0001] The invention belongs to the field of microcapsule materials, and in particular relates to a bivalve permethrin microcapsule and its preparation method and application. Background technique [0002] Microcapsule technology first started in the 1930s. After decades of development, it has been widely used in food, medicine, cosmetics and other fields. Under the background of multidisciplinary applications, microcapsule technology has a tendency to expand to new fields such as resins and coatings. The so-called microcapsule technology refers to the technology of encapsulating solid, liquid or gas in tiny and sealed capsules by physical or chemical methods, and releasing them at a certain rate by controlling environmental conditions. Among them, the encapsulated substance is called the active core material, and the inert substance that encapsulates the core material to achieve microcapsule encapsulation is called the wall material. The wall material of t...

Claims

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Application Information

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IPC IPC(8): B01J13/16B01J13/18A01N65/12A01N53/08A01N53/02A01N37/32A01N25/28A01P17/00C09D5/14C08G12/32
CPCA01N25/28A01N37/32A01N53/00A01N65/12B01J13/16B01J13/18C08G12/32C09D5/14
Inventor 胡剑峰来鑫瞿金清
Owner SOUTH CHINA UNIV OF TECH