Epoxy coating and preparation method and using method thereof

An epoxy coating and coating technology, which is applied to epoxy coatings, anti-corrosion coatings, coatings, etc., can solve the problems of low surface energy, inability to prepare strong hydrophobic coatings, etc., and achieves low cost, simple method and simple equipment. Effect

Inactive Publication Date: 2009-12-02
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the defect that strong hydrophobic coatings cannot be prepared with fluorine-containing substances in the current technology. We have prepared a kind of epoxy coating with low surface energy. This technology applies the theory of hydrophobicity to epoxy coatings. And using the principle of microphase separation, a microstructure with a certain roughness is constructed on the surface of the epoxy coating

Method used

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  • Epoxy coating and preparation method and using method thereof
  • Epoxy coating and preparation method and using method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] 1. Preparation and characterization of fluorine-containing acrylate-methyl methacrylate-styrene copolymer:

[0032] Add 0.25 grams of sodium dodecyl sulfate (SDS), 0.25 grams of nonylphenol polyoxyethylene ether (OP-10), 0.8 grams of tetrafluoropropanol, 0.4 grams of n-butanol, 4.0 gram of perfluoroalkyl ethyl acrylate (FA), 2.4 grams of methyl methacrylate (MMA), 2.4 grams of styrene (St), 43 grams of distilled water, pre-emulsified at 40°C at a stirring speed of 2500 rpm After 30 minutes, the pre-emulsion was obtained, and then 2 / 3 of the pre-emulsion was poured into the constant pressure dropping funnel. Fill the system with nitrogen and deoxygenate for 30 minutes (the following reaction process is kept under nitrogen atmosphere), the temperature of the system is raised to 80 ° C, and 0.06 grams of potassium persulfate (KPS) and 0.03 grams of sodium bisulfite (NaHSO 3 ), reacted for 1.5 hours, then added dropwise the mixed solution in the constant pressure dropping ...

Embodiment 2

[0058] (1) Weigh 0.04 grams of perfluoroalkyl ethyl acrylate-methyl methacrylate-styrene copolymer (same as Example 1), and 1.0 grams of epoxy paint (same as Example 1) to reactor 1 , add mixed solvent (with embodiment 1) 0.9 gram in reactor 1, stir, make mixture dissolve completely, obtain first component;

[0059] (2) Weigh 0.3 grams of curing agent TMEG in reactor 2, add 0.8 grams of mixed solvent (same as Example 1) to reactor 2, and stir with a glass rod until the curing agent TMEG is completely dissolved to obtain component B;

[0060] (3) Application method: Mix components A and B evenly, brush the board, put the sample board at 90°C for 3 hours, and then cure at 120°C for 2 hours;

[0061] The contact angle of the obtained modified epoxy coating to water is 140 °, and the water absorption rate is 0.15%, indicating that the hydrophobicity of the epoxy coating has been greatly improved; the adhesion of the modified epoxy coating is grade 1, the pencil hardness is 3H, and...

Embodiment 3

[0063] (1) Weigh 0.03 grams of perfluoroalkyl ethyl acrylate-methyl methacrylate-styrene copolymer (same as Example 1), and 1.0 grams of epoxy paint (same as Example 1) to reactor 1 , add mixed solvent (with embodiment 1) 0.9 gram in reactor 1, stir, make mixture dissolve completely, obtain first component;

[0064] (2) Weigh 0.3 grams of curing agent TMEG in reactor 2, add 1.0 grams of mixed solvent (same as in Example 1) to reactor 2, and stir with a glass rod until the curing agent TMEG is completely dissolved to obtain component B;

[0065] (3) Application method: Mix components A and B evenly, brush the board, put the sample board at 90°C to cure for 3 hours, and then cure at 125°C for 2 hours;

[0066] The contact angle of the obtained modified epoxy coating to water is 136 °, and the water absorption rate is 0.16%, indicating that the hydrophobicity of the epoxy coating has been greatly improved; the adhesion of the modified epoxy coating is grade 1, the pencil hardness...

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Abstract

The invention provides an epoxy coating and a preparation method and a using method thereof. The coating is formed by mixing a component A and a component B according to the proportion, wherein the component A comprises a fluoroacrylate copolymer, epoxy color paint and a mixed solvent 1; and the component B comprises a curing agent and a mixed solvent 2. The epoxy coating is prepared by the following steps: (1) adding the fluoroacrylate copolymer and the epoxy color paint into a reactor 1 according to the proportion, and adding the mixed solvent into the reactor 1 to obtain the component A; (2) adding the curing agent into a reactor 2 according to the proportion, and adding the mixed solvent into the reactor 2 to obtain the component B; and (3) mixing the component A and the component B evenly to finally obtain the modified epoxy coating. The epoxy coating ensures good compatibility of fluorine-containing copolymer and the epoxy coating and endows an epoxy coating with extremely low surface energy, thereby ensuring that an contact angle of the modified epoxy coating with water reaches around 140 degrees; and the application fields of the epoxy coating are greatly enlarged, the service life of the epoxy coating is prolonged, and the epoxy coating has quite good industrial application value.

Description

technical field [0001] The invention belongs to the technical field of preparation of low-surface-energy epoxy coatings, in particular to a hydrophobic low-surface-energy epoxy coating and methods for its preparation and use. technical background [0002] At present, the research on hydrophobic theory is very mature, and there are many methods to prepare hydrophobic materials. However, the hydrophobic materials currently on the market only add some low surface energy substances (such as silicon materials and fluorine materials), and the contact angle to water does not exceed 120°, which will greatly limit the application of these materials in some fields. limit. Therefore, the only way to further improve the hydrophobicity of the material is to change the surface microstructure. At present, there are template methods, (plasma) etching, vapor deposition, etc. to construct the surface microstructure of materials. Most of these methods require complex instruments and equipmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D133/16C09D5/08B05D3/02
Inventor 王月欣李景红王善兴张倩郝文珺黄婷
Owner HEBEI UNIV OF TECH
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