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Cathode electrophoresis paint with combined bottom surfaces and preparation method and application method thereof

A cathodic electrophoretic coating, bottom surface technology, applied in electrophoretic coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as technical difficulties and no mature products.

Active Publication Date: 2013-10-02
GUANGDONG KODEST EP SC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many researchers in this area, but it is still in the development stage, no mature products have been seen, and the technology is difficult

Method used

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  • Cathode electrophoresis paint with combined bottom surfaces and preparation method and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A kind of preparation method of cathodic electrophoretic coating of one bottom surface, comprises the steps:

[0041] (1) Preparation of curing agent

[0042] Mix and heat trimethylolpropane and alcohol ether solvents, add isocyanate dropwise before the temperature reaches 60°C, then keep warm at 60°C for 1 hour, heat to 70°C, and keep warm at 70°C for 2 hours. Curing agent, wherein, the mol ratio of isocyanate, alcohol ether solvent and trimethylol propane is 2: 1: 1;

[0043] (2) Preparation of the main resin

[0044] (1) Take a low molecular weight epoxy resin with a molar ratio of 7:4:1, bisphenol A and isooctanoic acid and react at 120°C for 3 hours to prepare a medium molecular weight epoxy resin with an average resin molecular weight of 1000;

[0045] (2) The main resin was prepared by taking medium molecular weight epoxy resin, N-methylethanolamine and ketimine with a molar ratio of 4:4:1 and reacting at 110°C for 2 hours;

[0046] (3) Preparation of dispersed ...

Embodiment 2

[0076] A kind of preparation method of cathodic electrophoretic coating of one bottom surface, comprises the steps:

[0077] (1) Preparation of curing agent

[0078] Mix and heat trimethylolpropane and alcohol ether solvents, add isocyanate dropwise before the temperature reaches 60°C, then keep warm at 60°C for 2 hours, heat to 70°C, and keep warm at 70°C for 2 hours. Curing agent, wherein, the mol ratio of isocyanate, alcohol ether solvent and trimethylol propane is 2.5: 2: 1.5;

[0079] (2) Preparation of the main resin

[0080] (1) Take low-molecular-weight epoxy resin with a molar ratio of 9:4:1, bisphenol A and isooctanoic acid to react at 130°C for 4 hours to prepare a medium-molecular-weight epoxy resin with an average molecular weight of 2000;

[0081] (2) The main resin was prepared by taking medium molecular weight epoxy resin, N-methylethanolamine and ketimine with a molar ratio of 5:5:1 and reacting at 20°C for 3 hours;

[0082] (3) Preparation of dispersed res...

Embodiment 3

[0103] A kind of preparation method of cathodic electrophoretic coating of one bottom surface, comprises the steps:

[0104] (1) Preparation of curing agent

[0105] Mix and heat trimethylolpropane and alcohol ether solvents, add isocyanate dropwise before the temperature reaches 60°C, then keep warm at 60°C for 1.5 hours, heat to 70°C, and keep warm at 70°C for 2 hours. Curing agent, wherein, the mol ratio of isocyanate, alcohol ether solvent and trimethylol propane is 2.3: 1.5: 1.2;

[0106] (2) Preparation of the main resin

[0107] (1) Take low-molecular-weight epoxy resin with a molar ratio of 8:4:1, bisphenol A and isooctanoic acid to react at 125°C for 3.5 hours to prepare a medium-molecular-weight epoxy resin with an average molecular weight of 1500;

[0108] (2) The main resin was prepared by taking middle molecular weight epoxy resin, N-methylethanolamine and ketimine with a molar ratio of 4.5:4.6:1 and reacting at 115°C for 2.5 hours;

[0109] (3) Preparation of ...

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Abstract

The invention relates to a preparation method for cathode electrophoresis paint with combined bottom surfaces. The preparation method comprises the following steps of preparing a curing agent, matrix resin, dispersion resin, positive ion acrylic resin, an emulsion I, a positive ion acrylic emulsion, and mill base sequentially, then mixing the mill base, the emulsion I, the positive ion acrylic emulsion and deionized water according to the proportion of 1:(1-2):(3-5):(6-7), regulating the solid content of a paint working solution to be 15%-30%, after 48 hours of circulation, coating through electrophoresis so as to prepare the cathode electrophoresis paint with the combined bottom surfaces. When the cathode electrophoresis paint with the combined bottom surfaces is baked, the epoxy component with strong surface tension is deposited at the under layer, and the crylic acid component with little surface tension is on the surface layer, so that the coating with good corrosion resistance and weather resistance is formed.

Description

Technical field [0001] The present invention involves a type of electro -sword paint, especially a cathode electrophoretic coatings and preparation methods and methods of use. Background technique [0002] Cathode electrophoretic coatings are usually based on epoxy resins with good corrosion resistance.Epoxy resin is mostly bisphenol A. Because it has high adhesion and excellent anti -corrosion performance, it is often used as primer and anticorrosive paint.Although its corrosion resistance is excellent, the weather resistance is not good enough.Acrylic resin is rich in weather tolerance and good color, lighting, and abundant sources of monomer, so it is widely used.It is generally used as the bottom layer of coating. The top paint still uses acrylic resin paint to ensure weather resistance and plumpness.By using the use of the bottom surface -colored type of cathode electrophoretic coating, the performance of epoxy resin coatings and acrylic coatings is comprehensively applied t...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/12C09D5/44C08G18/58C08G18/62C08F220/18C08F220/28C08F220/14C08F220/32C08F212/08
Inventor 李文庄高睿何愿文陈立志黄小勇梁卫南
Owner GUANGDONG KODEST EP SC CO LTD