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Low surface energy polymer microcapsules and preparation method thereof

A low surface energy, polymer technology, applied in the direction of microcapsule preparation, microsphere preparation, coating, etc., can solve the problems of poor compatibility, no products, less research, etc.

Active Publication Date: 2013-01-30
WUHAN RES INST OF MATERIALS PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similarly, it can be used to solve the problem of poor compatibility between low surface energy materials and coatings, and use polymers with good compatibility with coating resins to coat low surface energy materials to form a coating that can be uniformly dispersed in coatings and ensure low Microcapsules with surface energy properties, but there are relatively few studies on this aspect, and there are no related products

Method used

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  • Low surface energy polymer microcapsules and preparation method thereof
  • Low surface energy polymer microcapsules and preparation method thereof
  • Low surface energy polymer microcapsules and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: The low surface energy polymer core material adopts the fluorosilicon polymer satisfying the following formula:

[0034]

[0035] (1) Add 10 parts of urea and 35 parts of formaldehyde into the reaction flask, stir and mix, and adjust the pH of the mixture to 8-9 with 10% aqueous sodium carbonate solution.

[0036] (2) Heat the mixture in step (1) to 70° C. for 50 minutes to prepare a urea-formaldehyde resin prepolymer.

[0037] (3) Add 40 parts of fluorosilicone polymer, 1 part of Tween-80 dispersant and 250 parts of water into the dispersion container, and disperse for 10 minutes at a speed of 3000 rpm using a high-speed shear emulsifier.

[0038] (4) Add 45 parts of the urea-formaldehyde resin prepolymer prepared in step (2) dropwise into the dispersion at a rate of 20 drops / minute.

[0039] (5), after the dropwise addition, adjust the acidity of the dispersion in the above step (4) to pH 2-3 with glacial acetic acid.

[0040] (6) Heat the dispersio...

Embodiment 2

[0041] Embodiment 2: Low surface energy polymer core material adopts hydrogen-containing silicone oil

[0042] (1) Add 30 parts of urea and 50 parts of formaldehyde into the reaction flask, stir and mix, and adjust the pH of the mixture to 8-9 with 10% aqueous sodium carbonate solution.

[0043] (2) Heat the mixture in step (1) to 70°C and react for 50 minutes to prepare a urea-formaldehyde resin prepolymer.

[0044] (3) Add 60 parts of methyl silicone oil, 2 parts of Tween-80 dispersant and 300 parts of water into the dispersion container, and use a high-speed shear emulsifier to disperse at a speed of 3000 rpm for 10 minutes.

[0045] (4) Add 80 parts of urea-formaldehyde resin prepolymer prepared in step (2) dropwise into the dispersion in step (3) at a rate of 30 drops / min.

[0046] (5), after the dropwise addition, adjust the acidity of the dispersion in the above step (4) to pH 2-3 with glacial acetic acid.

[0047] (6) Heat the dispersion liquid in step (5) to 50° C. ...

Embodiment 3

[0048] Embodiment 3: low surface energy polymer core material adopts fluorinated acrylate

[0049] (1) Add 20 parts of urea and 40 parts of formaldehyde into the reaction flask, stir and mix, and adjust the pH of the mixture to 8-9 with 10% aqueous sodium carbonate solution.

[0050](2) Heat the mixture in step (1) above to 70° C. and react for 50 minutes to prepare a urea-formaldehyde resin prepolymer.

[0051] (3) Add 55 parts of fluorinated acrylate, 1.5 parts of Tween-80 dispersant and 280 parts of water into a dispersion container, and disperse for 10 minutes at a speed of 3000 rpm using a high-speed shear emulsifier.

[0052] (4) Add 60 parts of the urea-formaldehyde resin prepolymer prepared in the above step (2) dropwise into the dispersion at a rate of 25 drops / minute.

[0053] (5), after the dropwise addition, adjust the acidity of the dispersion in the above step (4) to pH 2-3 with glacial acetic acid.

[0054] (6) Heating the dispersion liquid in step (5) to 60° ...

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Abstract

The invention discloses low surface energy polymer microcapsules and a preparation method thereof, and relates to the field of coating industry. The microcapsules consist of a low surface energy polymer core material and a wall material prepolymer, wherein the low surface energy polymer core material is a fluorine silicon polymer, an organic silicon polymer or a fluorocarbon polymer; the wall material prepolymer is a water-soluble urea resin prepolymer; and the mass ratio of the low surface energy polymer to the wall material prepolymer is (40-60): (45-80). The preparation method comprises the following steps of: preparing water dispersion of the low surface energy polymer core material according to the formula, preparing the water-soluble urea resin prepolymer serving as the wall material according to the formula, dripping and dispersing the water-soluble urea resin prepolymer into the water dispersion of the low surface energy polymer core material, and obtaining the low surface energy polymer microcapsules by heating reaction. The wall material and the coating resin base material have excellent compatibility, the low surface energy core material is released and dispersed in the coating to endow the coating with excellent low surface energy property, and the low surface energy core material is widely suitable for preparing various low surface energy antifouling coatings and flow resistance reducing coatings.

Description

technical field [0001] The invention discloses a low surface energy polymer microcapsule and a preparation method thereof, and relates to the microcapsule and the preparation method thereof in the field of coating industry. Background technique [0002] Low surface energy materials are widely used in the field of coatings because of their special properties, but some low surface energy materials, such as silicone oil and fluorine-containing monomers, have good low surface energy properties, but have poor compatibility with coatings. This makes it impossible to directly add to coatings, which limits the application of low surface energy materials in coatings. [0003] Microcapsule technology is a technology that encapsulates tiny solid particles, liquid droplets or gases into shell materials. The coated tiny solid particles, liquid droplets or gases are isolated from the outside world and are not affected by the external environment. The special core-shell structure of micr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/24C08L83/08C08L83/04C08L83/05C08G12/12B01J13/18C09D7/12
Inventor 刘秀生崔盼汪洋刘兰轩苗毅张迎平
Owner WUHAN RES INST OF MATERIALS PROTECTION
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