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Epoxy resin anticorrosive coating with fluoropolymer modified montmorillonite as well as preparation method and application of coating

An epoxy resin and anti-corrosion coating technology, applied in the field of material science, can solve the problems of loss of hydrophobicity, reduced hydrophilicity, limited hydrophobicity, etc. The effect of long-lasting hydrophobicity

Inactive Publication Date: 2019-09-17
中科广化(重庆)新材料研究院有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrophobic surface of the hydrophobic epoxy resin coating obtained by the general method is easily damaged by the service environment. When the hydrophobic layer on the surface is damaged, the coating loses its hydrophobic performance and its corrosion protection ability drops rapidly.
For example, the Chinese patent authorization text CN 102604467 B uses fluorine-containing polymers to modify epoxy resin to prepare a hydrophobic epoxy resin coating, but it is difficult for the obtained coating to maintain long-term hydrophobic performance under friction and wear conditions.
In the Chinese patent authorization text CN 102604467 B, the fluorine-containing substance is grafted onto the surface of the nanoparticles, and then the prepared hydrophobic nanospheres are added to the epoxy resin to obtain a coating with super-amphiphobic properties, but the surface layer of the coating Easy to lose superamphiphobic properties after wear
The organically modified montmorillonite reduces its hydrophilicity, and the montmorillonite is well dispersed in the epoxy resin coating. Only a small amount can be added to form a labyrinth effect inside the coating and prolong the corrosion of the corrosion medium. Penetration path, improve the corrosion protection ability of epoxy resin coating, but the hydrophobic performance of the existing organic montmorillonite is limited, can not improve the good hydrophobic performance for the fresh surface formed after the friction and wear of the coating

Method used

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  • Epoxy resin anticorrosive coating with fluoropolymer modified montmorillonite as well as preparation method and application of coating
  • Epoxy resin anticorrosive coating with fluoropolymer modified montmorillonite as well as preparation method and application of coating
  • Epoxy resin anticorrosive coating with fluoropolymer modified montmorillonite as well as preparation method and application of coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) Preparation of fluorine-containing poly(meth)acrylate emulsion

[0060] Weigh 12 g of methacryloxyethyltrimethylammonium chloride, 12 g of glycidyl methacrylate, 30 g of dodecafluoroheptyl methacrylate, and 6 g of methyl methacrylate. The four monomers were mixed and added to 330 g of deionized water, and then mechanically stirred at 700 rpm to form a uniform dispersion. The temperature of the dispersion liquid system was raised to 80°C, 2.4g of potassium persulfate was added, and the reaction was maintained at a constant temperature and stirring speed for 6 hours to obtain a fluorine-containing silicon polymethacrylate emulsion. After the system was cooled, the solid content of the fluorine-containing silicon polymethacrylate emulsion was determined to be about 19.5%.

[0061] (2) Preparation of fluorine-containing poly(meth)acrylate modified montmorillonite

[0062] Disperse 5 g of PGN-type sodium montmorillonite in 500 ml of deionized water, heat to 80° C., and...

Embodiment 2

[0071] (1) Preparation of fluorine-containing poly(meth)acrylate emulsion

[0072] Weigh 20 g of methacryloxyethyl dimethyl benzyl ammonium chloride, 15 g of glycidyl methacrylate, 50 g of hexafluorobutyl methacrylate, and 5 g of dodecyl methacrylate. The four monomers were mixed and added to 800 g of deionized water, and mechanically stirred at 750 rpm to form a uniform dispersion. The temperature of the dispersion liquid system was raised to 85°C, 4g of potassium persulfate was added, and the reaction was maintained at a constant temperature and stirring speed for 5 hours to obtain a fluorine-containing silicon polymethacrylate emulsion. After the system was cooled, the solid content of the fluorine-containing silicon polymethacrylate emulsion was determined to be about 9.8%.

[0073] (2) Preparation of fluorine-containing poly(meth)acrylate modified montmorillonite

[0074] Disperse 10g of PGV-type sodium montmorillonite in 600ml of deionized water, heat to 90°C, and stir...

Embodiment 3

[0083] (1) Preparation of fluorine-containing poly(meth)acrylate emulsion

[0084] Weigh 14 g of acryloyloxyethyl dimethylglycidyl ammonium chloride, 15 g of glycidyl acrylate, 20 g of trifluorooctyl acrylate, and 5 g of hydroxypropyl acrylate. The four monomers were mixed and added to 380 g of deionized water, and mechanically stirred at 900 rpm to form a uniform dispersion. The temperature of the dispersion liquid system was raised to 90°C, 2.7g of potassium persulfate was added, and the reaction was maintained at a constant temperature and stirring speed for 5.5 hours to obtain a fluorine-containing silicon polymethacrylate emulsion. After the system was cooled, the solid content of the fluorine-containing silicon polymethacrylate emulsion was determined to be about 14.5%.

[0085] (2) Preparation of fluorine-containing poly(meth)acrylate modified montmorillonite

[0086] Disperse 8g of PGW-type sodium montmorillonite in 500ml of deionized water, heat to 85°C, and stir at...

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Abstract

The invention discloses a wear-resistant hydrophobic epoxy resin anticorrosive coating with fluoropolymer modified montmorillonite as well as a preparation method and application of the coating. The coating comprises an A component and a B component; the A component specifically comprises the following materials, in parts by mass: 100 parts of epoxy resin, 0.5-10 parts of the fluoropolymer modified montmorillonite, 0-20 parts of a reactive diluent, 0-100 parts of a filler, 0.5-3 parts of a silane coupling agent, 0.1-2 parts of a wetting dispersing agent, and 0-50 parts of a solvent; the B component comprises the following materials, in parts by mass: 100 parts of a curing agent, 0.05-0.5 part of a defoaming agent, 0.05-0.5 part of a levelling agent, and 0-20 parts of a solvent; and a mass ratio of the A component to the B component is 100:(20-100). An anticorrosive coating layer prepared from the wear-resistant hydrophobic epoxy resin anticorrosive coating with the fluoropolymer modified montmorillonite provided by the invention has good hydrophobicity and corrosion protection performance, and the coating layer can maintain good hydrophobic protection capability for a long time under the conditions such as friction and wear.

Description

technical field [0001] The invention belongs to the technical field of material science, and in particular relates to an epoxy resin anticorrosion coating added with fluoropolymer-modified montmorillonite, a preparation method and application thereof. Background technique [0002] Epoxy resin coatings have excellent chemical resistance, exhibit good adhesion to a variety of substrates, and are widely used in the field of corrosion protection. However, harsh corrosive environments such as marine atmospheric areas, splash areas, tidal range areas, and full immersion areas have put forward higher requirements for the corrosion protection capabilities of epoxy resins. [0003] Improving the hydrophobicity of the epoxy coating can reduce the contact between the coating and the electrolyte, thereby improving the corrosion protection performance of the epoxy coating. However, the hydrophobic surface of the hydrophobic epoxy resin coating obtained by the general method is easily da...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/08C09D7/62C08F220/24C08F220/34C08F220/32C08F220/14C08F220/18C08F220/20
CPCC08F220/24C08K2003/2241C08K2201/011C09D5/08C09D163/00C09D7/62C08K13/06C08K9/08C08K3/346C08K9/06C08K3/36C08K3/22
Inventor 刘伟区刘春华梁利岩
Owner 中科广化(重庆)新材料研究院有限公司
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