Metallic cathode electrophoretic paint and preparation method thereof

A technology for electrophoretic coatings and metal cathodes, applied in electrophoretic coatings, coatings, etc., can solve problems such as poor adhesion of paint films, achieve low curing temperature, improve binding ability, and enhance acid resistance.

Active Publication Date: 2015-01-28
江苏悠谷未来科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The purpose of the present invention is to provide a metal cathodic electrophoretic coating and its preparation method in order to overcome the deficiencies of the prior art above, improve the acid resistance, alkali resistance, neutral salt spray resistance and boiling water resistance of the paint film, and overcome the workpiece edges and corners at the same time Or the problem of poor adhesion of the tip paint film

Method used

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  • Metallic cathode electrophoretic paint and preparation method thereof
  • Metallic cathode electrophoretic paint and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0038] A metal cathodic electrophoretic coating, comprising: 20 parts of modified epoxy resins, 0.5 parts of methyltrimethoxysilane, 2 parts of hydroxypropyl cellulose acetate, and 5 parts of ethyl 2-cyanoacrylate by weight components , 0.8 part of acrylamide, 0.6 part of 2-acrylamido-2-methylpropanesulfonic acid, 1 part of hypromellose, 0.8 part of zinc stearate; wherein the formula of the modified epoxy resin is expressed in weight units The components include: 10 parts of epoxy resin, 4 parts of alkylphenol polyoxyethylene ether, 2 parts of toluene diisocyanate, 1 part of azobisisobutyronitrile, and 2 parts of maleic anhydride.

[0039] The particle size of the above zinc stearate was 100 μm.

[0040] (1) The preparation method of above modified epoxy resin is:

[0041] Step 1, adding epoxy resin to the reaction kettle, adding alkylphenol polyoxyethylene ether and azobisisobutyronitrile, stirring and mixing evenly, wherein the condition of stirring and mixing is that the s...

Embodiment 2

[0048] A metal cathodic electrophoretic coating, comprising: 25 parts of modified epoxy resins, 0.8 parts of methyltrimethoxysilane, 5 parts of hydroxypropyl cellulose acetate, and 8 parts of ethyl 2-cyanoacrylate by weight components , 1.2 parts of acrylamide, 1 part of 2-acrylamido-2-methylpropanesulfonic acid, 2 parts of hypromellose, 2 parts of zinc stearate; wherein the formula of the modified epoxy resin is expressed by weight The components include: 14 parts of epoxy resin, 5 parts of alkylphenol polyoxyethylene ether, 4 parts of toluene diisocyanate, 2 parts of azobisisobutyronitrile, and 3 parts of maleic anhydride.

[0049] The particle size of the above zinc stearate was 120 μm.

[0050] (1) The preparation method of above modified epoxy resin is:

[0051] Step 1, adding epoxy resin to the reaction kettle, adding alkylphenol polyoxyethylene ether and azobisisobutyronitrile, stirring and mixing evenly, wherein the conditions of stirring and mixing are stirring at a ...

Embodiment 3

[0058] A metal cathodic electrophoretic coating, comprising by weight components: 27 parts of modified epoxy resin, 1 part of methyltrimethoxysilane, 6 parts of hydroxypropyl cellulose acetate, 9 parts of ethyl 2-cyanoacrylate , 1.5 parts of acrylamide, 1.2 parts of 2-acrylamido-2-methylpropanesulfonic acid, 3 parts of hypromellose, 2.3 parts of zinc stearate; wherein the formula of the modified epoxy resin is expressed by weight The components include: 16 parts of epoxy resin, 6 parts of alkylphenol polyoxyethylene ether, 5 parts of toluene diisocyanate, 3 parts of azobisisobutyronitrile, and 4 parts of maleic anhydride.

[0059] The particle size of the above zinc stearate was 150 μm.

[0060] (1) The preparation method of above modified epoxy resin is:

[0061] Step 1: Add epoxy resin to the reaction kettle, add alkylphenol polyoxyethylene ether and azobisisobutyronitrile, stir and mix evenly, wherein the condition of stirring and mixing is that the stirring speed is 110 r...

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Abstract

The invention discloses metallic cathode electrophoretic paint and a preparation method thereof. The metallic cathode electrophoretic paint comprises the following components: modified epoxy resin, methyl trimethoxy silane, hydroxy propyl cellulose acetic ester, 2-cyan ethyl acrylate, acrylamide, 2-acrylamide-2-methyl propanesulfonic acid, propanesulfonic acid and zinc stearate. The preparation method comprises the following steps: adding modified epoxy resin, hydroxy propyl cellulose acetic ester and 2-cyan ethyl acrylate into a reaction kettle, heating till the above components are molten, adding hydroxypropyl methylcellulose and methyl trimethoxy silane, heating, stirring to react, further adding deionized water, further reacting at certain temperature and vacuum degree, finally adding acrylamide, heating, stirring, subsequently cooling, adding 2-acrylamide-2-methyl propanesulfonic acid and zinc stearate, stirring, reacting, and finally cooling to room temperature, thereby obtaining the metallic cathode electrophoretic paint. By adopting the metallic cathode electrophoretic paint disclosed by the invention, the properties of a coated paint membrane are greatly improved, and the use range of the cathode electrophoretic paint is further widened and expanded.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, in particular to a metal cathodic electrophoretic coating and a preparation method thereof. Background technique [0002] Electrophoretic coating is a relatively new coating process at present. It is a water-soluble organic coating with a positive (or negative) charge, which is uniformly dissolved (or dispersed) in an aqueous solution at a relatively dilute concentration, and the conductive workpiece (coated object) is used as the cathode (or Anode) In addition, the metal plate or carbon plate is used as the anode (or cathode), and under certain process conditions, a direct current is passed between the two electrodes (a higher voltage must be applied), so that the electrophoretic coating is evenly deposited on the workpiece. Forms an organic coating that is insoluble in water. After drying and curing at a certain temperature, an organic coating film with high hardness is obtain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/06C09D4/02C09D7/12C09D5/44
Inventor 张学平朱忠海
Owner 江苏悠谷未来科技有限公司
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