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Epoxy metal paint and preparation method thereof

A metal coating and epoxy technology, applied in the field of coatings, can solve the problems of high brittleness of epoxy resin cured products, impact resistance, acid and alkali resistance, poor flexibility and temperature resistance, and limit the application of epoxy resin coatings. Effect of achieving dispersion compatibility, improving corrosion resistance and mechanical properties

Inactive Publication Date: 2019-04-16
方少章
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the high brittleness of epoxy resin cured products, poor impact resistance, acid and alkali resistance, flexibility and temperature resistance, the application of epoxy resin coatings is limited. One of the focuses of the research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] An epoxy metal coating is composed of the following raw materials in parts by weight: epoxy resin E44 155, 3-aminopropyltrimethoxysilane 2.5, dihydrogen phosphate 1.5, phenylacryltriazole 1.5, stearin Salt 2.5, dibasic lead phosphite 0.015, pentaerythritol 5, methyl methacrylate 18, glycidyl alcohol 11, lithium methoxide 0.15, polysorbate 1.5, boron trifluoride ether 1.2, polypyrrole 12.

[0019] Described stearate is a kind of in zinc stearate, calcium stearate.

[0020] The preparation method of described epoxy metal paint, comprises the following steps:

[0021] (1) Take 3-aminopropyltrimethoxysilane, add it to 6 times its weight in absolute ethanol, stir evenly, mix with pentaerythritol, increase the temperature to 55°C, keep stirring for 25 minutes, and obtain a complex alcohol dispersion ;

[0022] (2) Mix polypyrrole and benzotriazole, add it to anhydrous toluene that is 5-7 times the weight of the mixture, and stir evenly to obtain a toluene solution;

[0023...

Embodiment 2

[0028] An epoxy metal coating is composed of the following raw materials in parts by weight: Epoxy resin E44 200, 3-aminopropyltrimethoxysilane 3, ammonium dihydrogen phosphate 2, benzotriazole 2, stearin Salt 3, lead dibasic phosphite 0.02, pentaerythritol 6, methyl methacrylate 20, glycidol 13, lithium methoxide 0.2, polysorbate 2, boron trifluoride ether 2, polypyrrole 15.

[0029] Described stearate is a kind of in zinc stearate, calcium stearate.

[0030] The preparation method of described epoxy metal paint, comprises the following steps:

[0031] (1) Take 3-aminopropyltrimethoxysilane, add it to 10 times its weight in absolute ethanol, stir evenly, mix with pentaerythritol, raise the temperature to 60°C, keep stirring for 30 minutes, and obtain a complex alcohol dispersion ;

[0032] (2) Mix polypyrrole and benzotriazole, add it to anhydrous toluene that is 7 times the weight of the mixture, and stir evenly to obtain a toluene solution;

[0033] (3) Mix methyl methac...

Embodiment 3

[0038] An epoxy metal coating is composed of the following raw materials in parts by weight: epoxy resin E44 130, 3-aminopropyltrimethoxysilane 2, ammonium dihydrogen phosphate 1, benzotriazole 1, stearin Salt 2, lead dibasic phosphite 0.01, pentaerythritol 4, methyl methacrylate 16, glycidol 10, lithium methoxide 0.1, polysorbate 1, boron trifluoride ether 0.8, polypyrrole 10.

[0039] Described stearate is a kind of in zinc stearate, calcium stearate.

[0040] The preparation method of described epoxy metal paint, comprises the following steps:

[0041] (1) Take 3-aminopropyltrimethoxysilane, add it to 4 times its weight in absolute ethanol, stir evenly, mix with pentaerythritol, increase the temperature to 55°C, keep stirring for 20 minutes, and obtain a complex alcohol dispersion ;

[0042] (2) Mix polypyrrole and benzotriazole, add it to anhydrous toluene that is 5 times the weight of the mixture, and stir evenly to obtain a toluene solution;

[0043] (3) Mix methyl me...

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Abstract

The invention discloses epoxy metal paint and a preparation method thereof. The epoxy metal paint comprises, by weight, 130-200 parts of epoxy resin E44, 2-3 parts of 3-aminopropyl trimethoxy silane,1-2 parts of ammonium dihydrogen phosphate, 1-2 parts of benzotriazole, 2-3 parts of stearate, 0.01-0.02 part of lead oxide phosphite hydrate, 4-6 parts of pentaerythritol, 16-20 parts of methyl methacrylate, 10-13 parts of glycidol, 0.1-0.2 part of lithium methoxide, 1-2 parts of polysorbate, 0.8-2 parts of boron trifluoride diethyl etherate and 10-15 parts of polypyrrole. Ammonium dihydrogen phosphate serves as a catalyst, and epoxide ring-opening is achieved at high temperature, so that the dispersion compatibility of all the raw materials is achieved; meanwhile, the anti-corrosion performance and mechanical property of the finished product can be effectively improved by introducing polypyrrole.

Description

technical field [0001] The invention belongs to the field of coatings, and in particular relates to an epoxy metal coating and a preparation method thereof. Background technique [0002] Epoxy resins are used in anti-corrosion coatings with liquid resins accounting for the largest share, but most of the coatings used in industry are solvent-based coatings. Conventional solvent-based coatings mostly use aromatic hydrocarbons, esters, alcohols, ketones, etc. as solvents , these solvents have varying degrees of toxicity, and the volatiles are directly discharged into the air, causing serious environmental pollution. With the enhancement of people's awareness of environmental protection, new anti-corrosion coatings such as powder coatings, solvent-free coatings and water-based coatings, which do not contain organic solvents or low VOC, have been developed one after another. Due to the harsh curing conditions of powder coatings, its development is limited; solvent-free epoxy coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D179/04C09D5/08C09D7/61C09D7/63C08G73/06
CPCC08G73/0611C09D5/08C09D7/61C09D7/63C09D163/00C08L79/04C08K13/02C08K5/544C08K5/053C08K5/098C08K3/32
Inventor 不公告发明人
Owner 方少章
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