Water-based fluorine-containing epoxy paint

An epoxy coating and water-based epoxy resin technology, applied in the coating field, can solve the problems of epoxy coating weather resistance, poor wear resistance, lack of waterproof and anti-icing performance, and high surface energy of the coating film, and achieves low cost and production. and the coating process are both environmentally friendly and the production process is simple.

Inactive Publication Date: 2014-02-12
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface energy of the epoxy coating film is high, the contact angle of water droplets is low (30-50°), and it ...

Method used

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  • Water-based fluorine-containing epoxy paint
  • Water-based fluorine-containing epoxy paint
  • Water-based fluorine-containing epoxy paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Add 20 parts by volume of absolute ethanol, 0.5 parts by volume of γ-aminopropyltriethoxysilane (KH-550), and 0.2 parts by volume of heptadecylfluorodecyltriethoxysilane (FAS) in Mix evenly under magnetic stirring, slowly adjust the pH value to about 4 with 50% hydrochloric acid, and obtain fluorine-containing silicone sol after reacting at room temperature for 45 minutes.

[0024] (2) At room temperature, mix 4 parts by volume of the above-mentioned sol with 10 parts by volume of water-based epoxy resin emulsion (Zhejiang Anbang New Material Co., Ltd., AB-EP-51, solid content 49-51%), under magnetic stirring, React at room temperature for 0.5h. After the reaction, the amine-containing silanol is grafted onto the epoxy to obtain a modified water-based epoxy emulsion.

[0025] (3) At room temperature, take 1.5 parts of modified amine curing agent (Zhejiang Anbang New Material Co., Ltd., AB-HGF, solid content 39-41%) into the above modified epoxy emulsion, and react u...

Embodiment 2

[0032] The amount (v%) of heptadecafluorodecyltriethoxysilane (FAS) was changed to 0.12v%, and the other conditions were the same as in Example 1 to prepare a water-based fluorine-containing epoxy resin coating.

[0033] After the prepared water-based fluorine-containing epoxy resin coating was dip-coated on the glass surface, it was cured at 120°C for 1 hour to obtain a surface coating. The surface fluorine content of the coating was analyzed by X-ray fluorescence spectroscopy, and the results are shown in the table 2.

Embodiment 3

[0035] The amount (v%) of heptadecafluorodecyltriethoxysilane (FAS) was changed to 0.36v%, and other conditions were the same as in Example 1 to prepare a water-based fluorine-containing epoxy resin coating.

[0036] After the prepared water-based fluorine-containing epoxy resin coating was dip-coated on the glass surface, it was cured at 120°C for 1 hour to obtain a surface coating. The surface fluorine content of the coating was analyzed by X-ray fluorescence spectroscopy, and the results are shown in the table 2.

[0037] Table 2 Fluorine content and contact angle on coating surface

[0038]

[0039] a: The preparation method of the epoxy coating treated with FAS is: first treat the glass surface with the water-based epoxy resin emulsion in Example 1 to obtain an epoxy coating, and then immerse the epoxy coating in heptadecafluorodecyl tri Ethoxysilane (FAS) n-hexane solution (FAS volume fraction 0.5%) was treated for 1 h, and then baked at 120 ° C for 1 h to obtain an ...

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Abstract

The invention discloses water-based fluorine-containing epoxy paint. A preparation method of the water-based fluorine-containing epoxy paint comprises the following steps of (1) uniformly mixing absolute ethyl alcohol, amino siloxane and fluorine-containing siloxane under the condition of magnetic-force stirring, adjusting the pH value to 3-5, reacting for 45min to 65min at room temperature, thus obtaining the fluorine-containing and amino-containing siloxane sol, wherein the amino siloxane contains -NH2 or -NH-, and the fluorine-containing siloxane contains -CF2- or -CF3; (2) at room temperature, mixing the fluorine-containing and amino-containing siloxane sol with water-based epoxy resin emulsion, reacting for 0.5h to 1h under the condition of magnetic-force stirring, thus obtaining the modified water-based epoxy emulsion after the reaction; (3) at room temperature, adding polyamine curing agent into the modified epoxy emulsion and reacting for 10min to 20min under the condition of magnetic-force stirring, thus obtaining the water-based fluorine-containing epoxy paint. A coating prepared from the fluorine-containing epoxy paint has excellent hydrophobicity, chemical resistance, acid-alkali resistance and stain resistance and strong substrate combining force; the preparation method is simple, the cost is low, and the industrial production can be realized.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a water-based fluorine-containing epoxy coating. Background technique [0002] Fluorocarbon coatings have extremely low surface energy and the highest theoretical water droplet contact angle, which has attracted widespread attention in the fields of waterproof, anti-fouling and anti-icing. However, the contact angle of the mainstream fluorocarbon coating FEVE coating on the market with water is generally 85-95°, and according to research, only surfaces with a contact angle greater than 98° have antifouling effect, so in fact, the commercially available fluorocarbon The paint does not have an antifouling effect. In addition, the existing fluorocarbon coatings are expensive, and the solvents used are also highly toxic. [0003] Waterborne epoxy coatings are widely used because of their abundant sources, low price, environmental friendliness, high transparency, and excellent phys...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/08C09D7/12C08G59/64
Inventor 冯杰潘帅锋李杰
Owner ZHEJIANG UNIV OF TECH
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