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A kind of anti-water impact dark gray conductive primer for electrostatic coating and preparation method thereof

A technology of electrostatic coating and water impact, applied in the direction of conductive paint, coating, etc., can solve the problems of poor conductivity and high price, and achieve good adhesion

Active Publication Date: 2021-03-02
PETER LACKE SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conductive primer has the following problems: it uses chlorinated polypropylene resin, which contains halogen, and will produce toxic substances when the material is burned, and it will exist in the environment for many years, and even accumulate in the organism for life; it also contains conductive titanium dioxide and conductive metal powder , the price is more expensive; in addition, its dry film resistance is less than or equal to 1MΩ, and its conductivity is poor

Method used

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  • A kind of anti-water impact dark gray conductive primer for electrostatic coating and preparation method thereof
  • A kind of anti-water impact dark gray conductive primer for electrostatic coating and preparation method thereof
  • A kind of anti-water impact dark gray conductive primer for electrostatic coating and preparation method thereof

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Effect test

Embodiment 1

[0040] This embodiment 1

[0041] Since primers often need to be used with water-based paints and varnishes in application, it is particularly important to investigate the interlayer water impact performance of primer-supported water-based paints and varnishes. Regarding the formula, we believe after a series of evaluations that Hydroxy acrylic resin b has the most significant effect on this property.

[0042] Therefore, to investigate the effect of the amount of hydroxyacrylic resin b on the water impact test of the water-based paint and varnish supporting the primer, it was divided into three groups, and each group was tested three times in parallel. Specifically, the conductive primer in Example 1 is prepared from the following raw materials in parts by weight, as shown in Table 1:

[0043] Table I

[0044] components 1 2 3 Hydroxy acrylic resin a 20 copies 20 copies 20 copies Hydroxy acrylic resin b 0 5 copies 15 copies fumed silica ...

Embodiment 2

[0060] A kind of anti-water shock dark gray conductive primer for electrostatic coating of the present embodiment 2 is made from the raw materials comprising the following parts by weight:

[0061]

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Abstract

The invention discloses a water shock-resistant dark gray conductive primer for electrostatic coating, which comprises the following raw materials in parts by weight: 12-25 parts of hydroxyacrylic resin a, 5-15 parts of hydroxyacrylic resin b, and 5-15 parts of titanium dioxide , 1-8 parts of conductive carbon black, 0.5-2 parts of fumed silica, 0.1-2 parts of leveling agent, 0.5-3 parts of dispersant, 30-40 parts of solvent, 5-10 parts of HDI curing agent and 15 parts of thinner -25 parts, wherein the hydroxyl values ​​of the hydroxyacrylic resin a and the hydroxyacrylic resin b account for 0.3-0.6% and 0.8-1.2% of the solid content respectively. The dry film resistance of the primer of the present invention is less than or equal to 50kΩ, so that the color paint and varnish of the subsequent process can obtain the best film thickness and uniform paint film by electrostatic spraying, and the wet film resistance is more than or equal to 500kΩ, which can effectively protect the electrostatic paint. The installed equipment will not be broken down by high voltage; in addition, it has good adhesion with water-based paint and passed the test standard DBL 5416‑2011 of Daimler.

Description

technical field [0001] The invention belongs to the technical field of paint materials for automobiles, and particularly relates to a water shock-resistant dark gray conductive primer for electrostatic coating and a preparation method thereof, which can be widely used in ABS, ABS / PC, PP / EPDM, PC / PBT, etc. Automobile exterior parts made of materials, especially for automobile bumpers. Background technique [0002] Electrostatic spraying is a spraying method that uses a high-voltage electrostatic electric field to make negatively charged paint particles move in the direction opposite to the electric field, and adsorb the paint particles on the surface of the workpiece. Compared with air spraying, the paint utilization rate of electrostatic spraying is as high as 50-80%, while that of air spraying is only 20-30%. Therefore, electrostatic spraying can effectively increase the paint utilization rate, reduce the loss of paint, reduce the cost, and significantly reduce the number o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/14C09D7/61C09D5/24
CPCC08K2003/2241C08K2201/001C08L2205/025C09D5/24C09D133/14C08L33/14C08K3/22C08K3/04C08K3/36
Inventor 梅刚杜瑞贺霄洁周浩刘剑
Owner PETER LACKE SHANGHAI