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Preparation method of organic silicon modified cathode electrophoresis resin and cathode electrophoresis emulsion prepared by preparation method

A cathodic electrophoresis and silicone technology, which is applied in electrophoretic coatings, epoxy resin coatings, coatings, etc., can solve the problems of emulsion storage stability and uneven particle size distribution of emulsions, and improve sharp edge corrosion performance and adhesion Good, the effect of film thickness increase

Pending Publication Date: 2020-04-17
WUHU CHUNFENG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the way to improve the sharp edge corrosion performance is mainly to improve the sharp edge corrosion performance by changing the yield value of the coating film in the viscous flow state and increasing the thickness of the edge paint film. The common method adopted by other electrophoretic coating manufacturers on the market is to increase the main Resin molecular weight or increase the gel component to improve the yield value of the viscous flow state. The gel macromolecules are wrapped by hydrophilic groups to form micellar particles with larger particle sizes, resulting in uneven particle size distribution of the emulsion, which will stabilize the emulsion storage. sex has some influence

Method used

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  • Preparation method of organic silicon modified cathode electrophoresis resin and cathode electrophoresis emulsion prepared by preparation method
  • Preparation method of organic silicon modified cathode electrophoresis resin and cathode electrophoresis emulsion prepared by preparation method
  • Preparation method of organic silicon modified cathode electrophoresis resin and cathode electrophoresis emulsion prepared by preparation method

Examples

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Effect test

Embodiment 1

[0034] A preparation method of organosilicon modified cathodic electrophoresis resin, comprising the following steps:

[0035] (1) Mix 44 parts of epoxy resin E-51, 19 parts of bisphenol A, 0.3 parts of diethanolamine, and 3 parts of methyl isobutyl ketone, react at 120°C for 1 hour, and continue to add 2 parts of (3-glycidyloxypropoxy Propyl) methyldiethoxysilane, react 2.0h, then take a sample and test the epoxy value of reaction system, its epoxy value is 1.78;

[0036] (2) Add 10 parts of methyl isobutyl ketone to control the reaction temperature to 90°C, add 7 parts of diethanolamine, and raise the temperature to 140°C for 3 hours;

[0037] (3) Add 15 parts of methyl isobutyl ketone, mix and stir evenly, cool and discharge to obtain the organosilicon-modified cathodic electrophoresis resin SIED-1.

[0038] The solid content of the organosilicon-modified cathodic electrophoresis resin prepared in this example was 75%, and the amine value was 55.

Embodiment 2

[0040] A preparation method of organosilicon modified cathodic electrophoresis resin, comprising the following steps:

[0041] (1) Mix 44 parts of epoxy resin E-51, 19 parts of bisphenol A, 0.3 parts of diethanolamine, and 3 parts of methyl isobutyl ketone, react at 120°C for 1 hour, and continue to add 5.0 parts of (3-glycidyloxypropoxy Propyl) methyldiethoxysilane, react 2.0h, then take a sample and test the epoxy value of reaction system, its epoxy value is 1.85;

[0042] (2) Add 10 parts of methyl isobutyl ketone to control the reaction temperature to 90°C, add 7 parts of diethanolamine, and raise the temperature to 140°C for 3 hours;

[0043] (3) Add 15 parts of methyl isobutyl ketone, mix and stir evenly, cool and discharge to obtain the organosilicon-modified cathodic electrophoresis resin SIED-2.

[0044] The solid content of the organosilicon-modified cathodic electrophoresis resin prepared in this example was 75%, and the amine value was 57.

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Abstract

The invention discloses a preparation method of organic silicon modified cathode electrophoresis resin and a cathode electrophoresis emulsion prepared by preparation method. The preparation method comprises the steps: mixing epoxy resin E-51, bisphenol A, diethanol amine and methyl isobutyl ketone, carrying out a reaction at the temperature of 115-125 DEG C for 1 h, continuously adding an organicsilicon monomer, and carrying out a reaction for 2-2.5 h; adding methyl isobutyl ketone, controlling the reaction temperature to 90 DEG C, adding diethanol amine, heating to 140 DEG C, and carrying out a reaction for 3 h; and supplementing methyl isobutyl ketone, uniformly mixing and stirring, cooling and discharging to obtain the organic silicon modified cathode electrophoresis resin. The cathodeelectrophoresis emulsion and a bath solution are prepared by taking the organic silicon modified cathode electrophoresis resin as a raw material, the obtained cathode electrophoresis emulsion is stable in storage, and a paint film of a sample plate obtained by bath solution electrophoresis plate making is relatively good in salt spray resistance, sharp edge corrosion resistance and cup drawing performance.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrophoretic coatings, and in particular relates to a method for preparing organosilicon-modified cathodic electrophoresis resin and cathodic electrophoresis emulsion prepared therefrom. Background technique [0002] Electrophoretic coating is the most mature application in the automotive industry. In the field of auto parts and chassis, cathodic electrophoretic coating is currently the most important coating method. The electrophoretic coating film is in a viscous flow state when it is baked at high temperature. At this time, it has a better leveling effect and also reduces the film thickness of the sharp / edge parts of the workpiece, which leads to the salt spray effect on the edge parts. Poor, at present, electrophoretic coatings for general auto parts and chassis parts have high requirements for sharp edge corrosion, and more and more electrophoretic coating factories hope to use cath...

Claims

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Application Information

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IPC IPC(8): C08G59/14C09D163/00C09D175/04C09D5/08C09D5/44
CPCC08G59/145C09D5/4434C09D5/4473C09D5/4488C09D5/08
Inventor 梁欢金正北满中信
Owner WUHU CHUNFENG NEW MATERIAL
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