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Preparation method of special fluorine-containing dispersed resin mixture and microporous film

A technology for dispersing resins and mixtures, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problem of insufficient air permeability of films, water pressure resistance and filtration effects that cannot meet high-end application requirements, and mechanical strength Insufficient and other problems, to achieve good filtering effect, good mechanical strength, good water repellency

Active Publication Date: 2015-10-21
烟台海德新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tetrafluoroethylene homopolymer dispersion resin is usually made of microporous film material through paste extrusion, extrusion, deoiling, and then unidirectional or biaxial stretching, but this kind of film is either insufficient in air permeability or mechanical strength. Its water pressure resistance and filtration effect cannot meet the requirements of high-end applications. When it is applied to environmental protection filtration, the tension resistance and air permeability still need to be improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 (manufacture of tetrafluoroethylene homopolymer dispersion emulsion)

[0027] In a horizontal autoclave of about 100 liters, first add 50L of deionized water and 15g of ammonium perfluorooctanoate, vacuum the interior of the autoclave to exhaust oxygen (until the oxygen content is 99.99% into the kettle, and the pressure in the kettle reaches about 20 kg. Add 8 grams of ammonium persulfate (dissolved in 500 ml of water in advance) into the kettle as an initiator to start the homopolymerization reaction. The temperature in the kettle is maintained at 70-110°C. During the reaction, the pressure in the kettle is maintained at about 20 kg. The reaction was continued until the solid content of the emulsion reached about 20%. After the temperature in the kettle was lowered to room temperature, the stirring was stopped and the reaction was terminated to obtain a tetrafluoroethylene homopolymer dispersion emulsion with an average primary particle diameter of about ...

Embodiment 2

[0028] Embodiment 2 (manufacture of fluorine-containing hot-melt processability dispersion emulsion)

[0029] In a horizontal autoclave of about 100 liters, first add 50L of deionized water and 18g of ammonium perfluorooctanoate, vacuum the kettle to exhaust oxygen (until the oxygen content 3 .

Embodiment 3

[0030] Embodiment 3 (preparation of special fluorine-containing dispersion resin compound)

[0031] (3A) The tetrafluoroethylene homopolymer dispersion emulsion (solid content about 20%) of Example 1 and the fluorine-containing hot-melt processability dispersion emulsion (solid content about 30%) of Example 2 were mixed in a wet ratio of 3:2. Gravity blending, and then dilute the blend with deionized water to a solid content of about 13%, then high-speed stirring to break the emulsion, coagulate, and dry to obtain a special fluorine-containing dispersion resin mixture. The special fluorine-containing dispersion resin mixture has two melting points: 266°C and 335°C, and the standard specific gravity is about 2.17g / cm 3 . Convert the wet weight ratio to dry weight ratio, which is about (20%×3): (30%×2)=1:1.

[0032] (3B) Mix the tetrafluoroethylene homopolymer dispersion emulsion (solid content about 20%) of Example 1 and the fluorine-containing hot-melt processability dispers...

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Abstract

The invention discloses a preparation method for a special fluorine-containing dispersion resin mixture. The method comprises the following steps: blending a tetrafluoroethene homopolymer dispersion emulsion with a fluorine-containing hot-meltable processing dispersion emulsion according to a dry weight ratio of 19: 1 to 3: 7; then diluting an obtained blend with deionized water into a blended emulsion with solid content of 10 to 20%; and successively carrying out demulsification through high-speed stirring, coagulation and drying so as to obtain the special fluorine-containing dispersion resin mixture. The mixture is blended with lubricating oil so as to prepare a fluorine-containing microporous film. The fluorine-containing microporous film has high content of nanometer silk fiber and high physical and mechanical strength; when the microporous film is applied in the industries of filtration and clothes and compounded with a fabric, an obtained composite fabric has high water-pressure resistance, moisture permeability and air permeability and excellent tensile strength and can better realize market acceptance.

Description

technical field [0001] The invention relates to a fluorine-containing resin, in particular to a preparation method of a special fluorine-containing dispersed resin mixture and a microporous film thereof. Background technique [0002] Fluorine-containing resins, especially copolymer resins containing tetrafluoroethylene, have excellent physical and mechanical properties and chemical stability, and are widely used in various fields such as chemical materials, mechanical electronics, aerospace military industry, new materials and new energy. The polytetrafluoroethylene dispersed resin is extruded and deoiled by paste extrusion, and then stretched in one or two directions to obtain a microporous and breathable polytetrafluoroethylene microporous material. Due to its special properties, the material Become a high-end application of fluorine-containing functional materials, such as environmental protection filter materials, clothing fabrics, artificial organ materials, electronic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/18C08F114/26C08F214/26C08F2/28C08J9/28C08K3/22C08K3/16C08K3/04B32B27/12B32B27/30
Inventor 吴慧道许达士
Owner 烟台海德新材料有限公司
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