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Electrophoretic coating simulation ultrafiltration device and application thereof

An electrophoretic coating and ultrafiltrate technology, applied in electrolytic coatings, ultrafiltration, electrophoretic plating, etc., can solve the problems of bath parameter imbalance, loss, and inability to accurately solve the appearance defects of the coating film, so as to improve the appearance and the method is simple. Effect

Active Publication Date: 2018-01-19
LANGFANG NIPPON PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Electrophoretic coatings improve the appearance of the coating film mainly by adding various additives. Usually, the disadvantages of various appearances of the paint film are mainly caused by the imbalance of bath parameters and the introduction of a large number of external impurity ions.
The actual application of electrophoretic coatings is mainly to improve the appearance of the coating film by discharging the ultrafiltrate to bring out the miscellaneous ions. However, with the discharge of the ultrafiltrate, the small molecule resin and part of the acid in the coating will also be discharged out of the system. Moreover, generally speaking, the OEMs cannot quantify the specific parameters of the discharged ultrafiltrate, and usually rely on experience to operate and add additives, which not only leads to wasting a lot of time, but also still cannot accurately solve the flaws in the appearance of the coating film. Problems, in severe cases may cause production stoppage and bring great losses

Method used

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  • Electrophoretic coating simulation ultrafiltration device and application thereof
  • Electrophoretic coating simulation ultrafiltration device and application thereof
  • Electrophoretic coating simulation ultrafiltration device and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A kind of electrophoretic coating simulation ultrafiltration device, please refer to figure 1 as shown, figure 1 It is a structural schematic diagram of the electrophoretic paint simulation ultrafiltration device of the present embodiment, including an electrophoretic paint holding device 1, a magnetic circulation pump 2, an ultrafiltration device 4 and a holding ultrafiltrate device 6; the electrophoretic paint holding device 1 The outlet is connected to the inlet of the magnetic circulation pump 2, and the outlet of the magnetic circulation pump 2 is connected to the inlet of the ultrafiltration device 4; the ultrafiltration device 4 has two outlets, one of which is connected to the electrophoretic coating The inlet of holding device 1 is connected, and another outlet of described ultrafiltration device 4 leads in the described holding ultrafiltrate device 6; Described magnetic circulation pump 2 is positioned on support 3, and described ultrafiltration device 4 uses ...

Embodiment 2

[0072] Production site electrophoresis tank liquid weight is 220000kg, on-site car body paint film appearance is bad, get on-site tank liquid 4kg and utilize the method for ultrafiltration of the present invention to carry out ultrafiltration experiment, utilize electrophoresis device to carry out coating film preparation; Utilize roughness meter to measure coating film roughness to synthesize Judging the improvement of the appearance of the electrophoretic coating film. Specific steps are as follows:

[0073] 1, get 4kg electrophoretic paint, utilize electrophoretic apparatus to carry out coating film preparation; Use electrophoretic paint simulation ultrafiltration device of the present invention to ultrafilter 1kg UF liquid, the ultrafiltrate is numbered as 1#;

[0074] 2. Add 1kg of pure water to the electrophoretic coating, and use the electrophoresis instrument to prepare the coating film; then ultrafilter 1kg of UF liquid, and number the ultrafiltrate as 2#;

[0075] 3...

Embodiment 3

[0091] As can be seen from Example 1 and Example 2, the loss of small molecule resin in the electrophoresis tank can be obtained by the method of the present invention. The small molecule resin content of the new configuration coating of the same type is 30.40g, and the small molecule resin content of the coating with poor appearance is 30.40g. The resin content is 20.37g. Calculate the amount of small molecule resin that needs to be added. After the replenishment cycle is stable, the electrophoretic coating film is prepared again, and the roughness of the coating film appearance is measured. The obtained data are shown in Table 4:

[0092] Table 4

[0093]

[0094]

[0095] Ra is the value directly measured by the roughness meter, the smaller the value, the better the appearance of the coating film.

[0096] Illustrate by embodiment 3, after carrying out the simulation ultrafiltration of coating and the calculation quantitative addition of small molecular resin content ...

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Abstract

The present invention discloses an electrophoretic coating simulation ultrafiltration device, which comprises an electrophoretic coating containing device, a magnetic circulating pump, an ultrafiltration device and an ultrafiltrate containing device. The outlet of the electrophoretic coating containing device is connected with the inlet of the magnetic circulating pump, the outlet of the magneticcirculating pump is connected with the inlet of the ultrafiltration device, the ultrafiltration device has two outlets, one of the outlet is connected with the inlet of the electrophoretic coating containing device, the other outlet of the ultrafiltration device is communicated with the ultrafiltrate containing device, the magnetic circulating pump is located on a supporter, the ultrafiltration device is fixed with a fixing device, and the ultrafiltrate containing device is located in a weighing device. The electrophoretic coating simulation ultrafiltration device can be used to measure the loss of small molecule resin after quantitative discharge by performing laboratory simulation ultrafiltration on a main engine plant on-site bath solution, and by calculation of the small molecule resinin the quantitatively added bath solution, the electrophoretic coating simulation ultrafiltration device has a significant effect of quantitative excluding of ultrafiltrate and improvement of the appearance of an electrophoretic paint film.

Description

technical field [0001] The invention belongs to the technical field of paint preparation, and in particular relates to an electrophoretic paint simulated ultrafiltration device and a method for measuring the content of paint small molecule resin by using the device. Background technique [0002] Electrophoretic coatings improve the appearance of the coating film mainly by adding various additives. Usually, the disadvantages of various appearances of the paint film are mainly caused by the imbalance of bath parameters and the introduction of a large number of external impurity ions. The actual application of electrophoretic coatings is mainly to improve the appearance of the coating film by discharging the ultrafiltrate to bring out the miscellaneous ions. However, with the discharge of the ultrafiltrate, the small molecule resin and part of the acid in the coating will also be discharged out of the system. Moreover, generally speaking, the OEMs cannot quantify the specific p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04B01D61/18B01D61/20C25D13/22
Inventor 赵明李舫
Owner LANGFANG NIPPON PAINT
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