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Electrophoresis coating process for automobile part

An auto parts, electrophoretic coating technology, applied in electrophoretic coatings, metal material coating technology, electrolytic coatings, etc. Good temperature variability and good rust resistance

Inactive Publication Date: 2018-03-13
北京雁阳汽车配件有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only affects the comfort of the car, but also seriously affects the usability of the car

Method used

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  • Electrophoresis coating process for automobile part
  • Electrophoresis coating process for automobile part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]Preparation of silicon-fluorine modified cationic acrylic resin: under nitrogen atmosphere and stirring conditions, 20g propylene glycol methyl ether and 10g methyl methacrylate were mixed, and then added to the mixture of propylene glycol methyl ether and methyl methacrylate monomer At the same time, 20g of acrylate monomer (2g of butyl acrylate, 2g of isobornyl methacrylate, 4g of hydroxyethyl methacrylate, 6g of dimethylaminoethyl methacrylate and 6g of N-(isobutoxy) methyl Acrylic acid amide) and the mixture of 5g azobisisobutyronitrile and the mixture of 5g vinyltripropoxysilane and 5g perfluoropropyl ethyl methacrylate, the dropping temperature is 95 ℃, and the dropping time is 3 hours After the dropwise addition, 10g of propylene glycol methyl ether and 1g of azobisisobutyronitrile were added, the temperature was raised to 100°C, and then kept for 2h. After the reaction, the temperature was lowered to 65°C, and the pH was adjusted to 5~ 6. Obtain silicon-fluorine ...

Embodiment 2

[0049] Preparation of silicon-fluorine modified cationic acrylic resin: under nitrogen atmosphere and stirring conditions, 20g propylene glycol methyl ether and 13g methyl methacrylate were mixed, and then added to the mixture of propylene glycol methyl ether and methyl methacrylate monomer At the same time, 25g acrylate monomer (2.5g butyl acrylate, 2.5g isobornyl methacrylate, 5g hydroxyethyl methacrylate, 7.5g dimethylaminoethyl methacrylate and 7.5g N-(isobutoxy Base) methacrylic acid amide) and the mixture of 5g azobisisobutyronitrile and the mixture of 3g vinyltripropoxysilane and 4.5g perfluoropropyl ethyl methacrylate, the dropping temperature is 95 ℃, drop The addition time is 3 hours. After the dropwise addition, 5g of propylene glycol methyl ether and 1.5g of azobisisobutyronitrile are added. The temperature is raised to 100°C, and then kept for 2h. After the reaction is completed, the temperature is lowered to 65°, and added Lactic acid is used to adjust the pH to ...

Embodiment 3

[0062] Preparation of silicon-fluorine modified cationic acrylic resin: under nitrogen atmosphere and stirring conditions, 20g propylene glycol methyl ether and 15g methyl methacrylate were mixed, and then added to the mixture of propylene glycol methyl ether and methyl methacrylate monomer At the same time, 22g acrylate monomer (2.2g butyl acrylate, 2.2g isobornyl methacrylate, 4.4g hydroxyethyl methacrylate, 6.6g dimethylaminoethyl methacrylate and 6.6gN-(isobutyl Oxygen) methacrylic acid amide) and the mixture of 5g azobisisobutyronitrile and the mixture of 6g vinyltripropoxysilane and 3g perfluoropropyl ethyl methacrylate, the dropping temperature is 95 ℃, drop The addition time is 3 hours. After the dropwise addition, 7.5g of propylene glycol methyl ether and 2g of azobisisobutyronitrile are added. The temperature is raised to 100°C, and then kept for 2h. After the reaction is completed, the temperature is lowered to 65°, and added Lactic acid is used to adjust the pH to ...

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PUM

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Abstract

The invention relates to an electrophoresis coating process for an automobile part. The electrophoresis coating process for the automobile part comprises a pretreatment step and an electrophoresis step; and the electrophoresis step includes the following process steps that S1, a closed-type curing agent is prepared; S2, cathodic electrophoretic paint is prepared, wherein cationic type acrylic resin, the closed type curing agent and deionized water are dispersed, silicon and fluorine modified cathodic electrophoretic paint is prepared, and the weight ratio of the silicon and fluorine modified cationic type acrylic resin, to the closed type curing agent and to the deionized water is 1: 0.1: 4; and S3, an electrophoresis paint film is prepared and cured, wherein an automobile part after beingtreated through pretreatment step serves as an electrophoresis cathode, and electrophoresis coating is performed in the silicon and fluorine modified cathodic electrophoretic paint; and then washingis performed through deionized water, after washing, baking is performed for 30-45 min under the condition of the temperature of 160-170 DEG C, and the electrophoresis coating automobile part is obtained. By means of the electrophoresis coating process for the automobile part, the stone hitting resistance of the electrophoresis paint film is improved, good water and boiled water resistance is achieved, an electrophoresis paint film layer cannot disengage and is not prone to damage, the anti-rusting performance is good, and the temperature changing resistance is good.

Description

technical field [0001] The invention relates to the technical field of auto parts production, more specifically, it relates to an electrophoretic coating process for auto parts. Background technique [0002] In daily life, metal corrosion is a common phenomenon, and the damage and loss caused are very serious. In order to prevent the harm and loss caused by metal corrosion, people have used many methods and technologies, which are mainly divided into research on materials with high corrosion resistance and anti-corrosion treatment of metal surfaces. Generally, solvent-based coatings are used to prevent metal corrosion, and organic solvents account for about half of traditional solvent-based coatings. Solvent-based coatings are mainly used to adjust the viscosity of the coating so that the film thickness on the surface of the coated metal workpiece is uniform and continuous. During the drying process of the paint film, the solvent-based paint evaporates into the air. Solve...

Claims

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Application Information

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IPC IPC(8): C25D13/06C25D13/20C23C22/20C23G1/24C09D5/44
CPCC09D5/4411C09D5/4488C23C22/20C23G1/24C25D13/04C25D13/20
Inventor 孔令全
Owner 北京雁阳汽车配件有限责任公司
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