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Melamine resin and polyurea resin double-shell microcapsule and preparing method and application thereof

A technology of polyurea resin and melamine resin, which is applied in the field of melamine resin and polyurea resin double-shell microcapsules and their preparation, can solve the problems that the application range is greatly affected by environmental temperature and humidity, and the storage of core materials is unstable. , to achieve sustained and stable slow-release effect, increased storage stability, and excellent mechanical properties.

Active Publication Date: 2016-04-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing self-healing microcapsule core material is unstable in storage and its application range is greatly affected by ambient temperature and humidity, and provides a kind of core material with photocurable resin and polyurea resin and melamine resin as the inner and outer core materials. Double shell microcapsules and preparation method thereof

Method used

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  • Melamine resin and polyurea resin double-shell microcapsule and preparing method and application thereof
  • Melamine resin and polyurea resin double-shell microcapsule and preparing method and application thereof
  • Melamine resin and polyurea resin double-shell microcapsule and preparing method and application thereof

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Effect test

Embodiment 1

[0048] The prepared melamine resin and polyurea resin double-shell microcapsules are used in visible light self-healing materials, and the raw material formula is shown in Table 1.

[0049] Table 1

[0050]

[0051]

[0052] (1) Preparation of melamine prepolymer: Weigh melamine and formaldehyde solution according to the formula, (add melamine first and then add formaldehyde) in a three-necked flask and stir and mix, add triethylamine to adjust the pH value of the system to 8-9, mix melamine Heat and stir the mixed solution with formaldehyde in a 65°C water bath. After about 10 minutes, the system becomes transparent. Add distilled water of the same quality as the formaldehyde solution and continue the reaction for 50 minutes to obtain a transparent low molecular weight water-soluble melamine-formaldehyde prepolymer (melamine prepolymer).

[0053] (2) Preparation of melamine resin and polyurea resin double-shell microcapsules: take by weighing emulsifier gum arabic powd...

Embodiment 2

[0059] The prepared melamine resin and polyurea resin double-shell microcapsules are used in visible light self-healing materials, and the raw material formula is shown in Table 2.

[0060] Table 2

[0061]

[0062] (1) The preparation process of melamine prepolymer: take melamine and formaldehyde solution according to the formula, (add melamine first and then add formaldehyde) in a three-necked flask and stir and mix, add an appropriate amount of 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 the reaction for 50 minutes to obtain a transparent low molecular weight water-soluble melamine-formaldehyde prepolymer.

[0063] (2) The preparation process of melamine resin and polyurea resin double-shell microcapsules: take emulsifier gum arabic po...

Embodiment 3

[0067] The prepared melamine resin and polyurea resin double-shell microcapsules are used in visible light self-healing materials, and the raw material formula is shown in Table 3.

[0068] table 3

[0069]

[0070] (1) The preparation process of melamine prepolymer: take melamine and formaldehyde solution according to the formula, (add melamine first and then add formaldehyde) in a three-necked flask and stir and mix, add an appropriate amount of 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 the reaction for 50 minutes to obtain a transparent low molecular weight water-soluble melamine-formaldehyde prepolymer.

[0071] (2) The preparation process of melamine resin and polyurea resin double-shell microcapsules: take emulsifier gum arabic po...

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Abstract

The invention discloses a melamine resin and polyurea resin double-shell microcapsule and a preparing method and application thereof. The preparing method includes the steps that a melamine prepolymer, a chain extender and an emulsifying agent are added into a reactor by the mass ratio of 100:5:20-100:10:30, and stirred at a low speed at the room temperature until the melamine prepolymer, the chain extender and the emulsifying agent are completely dissolved, the pH value is adjusted to be one to six, a curing agent and core material homogeneous phase mixture is added, an emulsifying machine is used for emulsifying and stirring under the ice-bath condition, and emulsification is conducted continuously; the temperature of a water bath is raised to be 40 DEG C or above, a turbulent stirring paddle is used for stirring, a reaction continues to be conducted, the pH value is adjusted to be larger than or equal to six, and the reaction is stopped to obtain the double-shell microcapsule with the particle size of 0.1-300 micrometers, wherein an outer shell is made of melamine resin, and an inner shell is made of polyurea resin. A core material is protected by two shell materials, storage stability of the microcapsule can be improved, and the water mass content of the double-shell microcapsule is smaller than or equal to 5%; the critical stress is 0-900 mN, and the mechanical property is good.

Description

technical field [0001] The present invention relates to a kind of photocurable resin, particularly relate to a kind of melamine resin and polyurea resin double-shell microcapsule and its preparation method and application; The double-shell microcapsule is PU / MF encapsulated light-curable resin microcapsule , suitable for application in visible light self-healing materials. Background technique [0002] Although microcapsule technology began in the 1930s, it has developed very rapidly. So far, it has been widely used in food, medicine, cosmetics and other fields. Microcapsule technology refers to the technology of encapsulating solid, liquid or gas in tiny and sealed capsules so that they can be released at a certain rate under specific conditions. Among them, the encapsulated substance is called the core material, and the substance that encapsulates the core material to achieve microcapsule encapsulation is called the wall material. The encapsulating material of the outer...

Claims

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Application Information

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IPC IPC(8): B01J13/18C08G18/79C08G18/65C08G18/54C08G18/32C08G12/32C08L63/00C08L63/04C08L63/10C08L75/12
CPCB01J13/18C08G12/32C08G18/3228C08G18/544C08G18/6511C08G18/6529C08G18/79C08G18/794C08L63/00C08L63/04C08L2205/02C08L2205/035C08L63/10C08L75/12
Inventor 胡剑峰明耀强文玉良冷明全瞿金清伍明华
Owner SOUTH CHINA UNIV OF TECH
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