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Process for preparing fluorocarbon protective paint of aluminium alloy anodization

A protective coating and anodizing technology, which is applied in the field of aluminum alloy anodized fluorocarbon protective coating and its preparation, can solve the problems of narrow operating temperature range, poor acid resistance, poor acid resistance and alkali resistance, and can meet the protection requirements and anti-corrosion performance. Good, high adhesion effect

Inactive Publication Date: 2005-10-19
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aluminum alloy anodization is usually carried out under relatively harsh acid and alkali conditions, and the temperature range is large, and the expansion coefficient of aluminum alloy with temperature is large. At present, aluminum alloy anodized protective coatings have poor acid and alkali resistance, low elasticity, and low operating temperature. Disadvantages such as narrow range and slow drying speed
Polyester, polyurethane, and silicone protective coatings are not easy to remove after curing. Rubber and vinyl protective coatings have poor sealing effects on aluminum alloys. Acrylic protective coatings have poor acid resistance, brittle at low temperature, and sticky at high temperature. These factors are extremely important. Limits the excellent performance of aluminum alloy anodized film layer

Method used

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  • Process for preparing fluorocarbon protective paint of aluminium alloy anodization

Examples

Experimental program
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Effect test

Embodiment 1

[0028] This example demonstrates the preparation method of the rubber-modified fluorine-containing acrylic resin binder and the aluminum alloy anodized fluorocarbon protective coating of the present invention.

[0029] Mixed solvent 400g (wherein: cyclohexanone 100g, butyl acetate 200g, ethyl acetate 100g) into the reaction device, hexafluorobutyl acrylate 31g, styrene-butadiene rubber 24g, styrene 66g, methyl methacrylate 57g, 66 g of butyl acrylate and 57 g of 2-ethylhexyl acrylate were mixed evenly, 10% of the mixed monomers were added to the reaction device, stirring was started, the temperature was raised to 120° C., and the temperature was maintained under reflux for 30 minutes. The remaining 90% mixed monomers are mixed with mixed solvent 200g (cyclohexanone 50g, butyl acetate 100g, ethyl acetate 50g), dibenzoyl peroxide 5.4g, and added to the dropping tank for uniform dropwise addition, about 150-180 g Dropped in minutes. Insulation refluxed for 30 minutes, dripped in...

Embodiment 2

[0032] The formulation of rubber modified resin is as follows:

[0033] Hexafluorobutyl acrylate 63g

[0034] Styrene Butadiene Rubber 15g

[0035] Styrene 51g

[0036] Methyl methacrylate 60g

[0037] Butyl Acrylate 60g

[0038] 2-Ethylhexyl Acrylate 51g

[0039] Cyclohexanone 175g

[0040] Butyl acetate 350g

[0041] Ethyl acetate 175g

[0042] Dibenzoyl Peroxide 6g

[0043] The solid content of the rubber-modified fluorocarbon resin is 30%, the fluorine content is 10.1% of the solid content of the resin, and the content of styrene-butadiene rubber is 5% of the solid content of the resin.

[0044] The formula of anodized protective coatings for aluminum alloys is as follows:

[0045] Rubber Modified Acrylic Resin 1000g

[0046] Phthalocyanine Blue 20g

[0047] Fumed silica 20g

[0048] DEUCHEM 902 0.5g

[0049] Organic bentonite 0.5g

[0050] The viscosity of the aluminum alloy anodized protective coating is 25s and the fineness is 10μm.

Embodiment 3

[0052] The formulation of rubber modified resin is as follows:

[0053] Dodecafluorooctyl Acrylate 93g

[0054] Styrene Butadiene Rubber 9g

[0055] Styrene 50g

[0056] Methyl methacrylate 49g

[0057] Butyl Acrylate 54g

[0058] 2-Ethylhexyl Acrylate 54g

[0059] Cyclohexanone 175g

[0060] Butyl acetate 350g

[0061] Ethyl acetate 175g

[0062] Dibenzoyl Peroxide 6g

[0063] The solid content of the rubber-modified fluorocarbon resin is 30%, the fluorine content is 15% of the solid content of the resin, and the content of styrene-butadiene rubber is 3% of the solid content of the resin.

[0064] Anodized protective coatings are formulated as follows:

[0065] Rubber Modified Acrylic Resin 1000g

[0066] Phthalocyanine Blue 20g

[0067] Fumed silica 20g

[0068] DEUCHEM 902 0.5g

[0069] Organic bentonite 0.5g

[0070] The viscosity of the aluminum alloy anodized protective coating is 20s and the fineness is 5μm.

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Abstract

The present invention relates to the preparation process of protective fluorocarbon paint for aluminum alloy anodization. The protective fluorocarbon paint has rubber modified fluorocarbon resin base material prepared with mixed monomer comprising fluoroacrylic monomer, acrylate monomer, styrene and styrene-butadiene rubber as well as mixed solvent and primer through mixing, heating, filtering and other steps. The rubber modified fluorocarbon resin base material is mixed with pigment, modifier, pigment moistening dispersant and thickener, and the mixture is ground in grinder and added with mixed solvent to regulate viscosity and obtain the protective fluorocarbon paint for aluminum alloy anodization.

Description

technical field [0001] The invention relates to a fluorocarbon protective coating, in particular to a fluorocarbon protective coating used for anodization of aluminum alloys and a preparation method thereof. Background technique [0002] The anodized film of aluminum alloy has excellent bonding performance, low production cost and simple operation, so the anodization of aluminum alloy has been widely used, and the research and application of protective coating in the process of anodization of aluminum alloy is of great significance. [0003] Aluminum alloy anodization is usually carried out under harsh acid and alkali conditions, and the temperature range is large, and the expansion coefficient of aluminum alloy with temperature is large. The range is narrow and the drying speed is slow. Polyester, polyurethane and silicone protective coatings are not easy to remove after curing. Rubber and vinyl protective coatings have poor sealing effect on aluminum alloys. Acrylic prote...

Claims

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Application Information

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IPC IPC(8): C09D133/14
Inventor 杨保平崔锦峰张应鹏周应萍张建强
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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