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Normal-temperature binding preparation method of powder coating

A powder coating and binding technology, applied in powder coatings, polyester coatings, coatings, etc., can solve the problems of high scrap rate, wrong binding, high cost, etc., to reduce binding temperature, avoid high scrap rate, The effect of simplifying the binding operation

Active Publication Date: 2017-11-17
天津西敦粉漆科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a normal-temperature binding preparation method for powder coatings. After metal powder is coated with a water-soluble resin, the thickness of the coating layer formed by the water-soluble resin on the surface of the metal powder and / or imitation metal powder particles is 10-1000 nm. , and then add the powder coating to the system to realize the binding with the powder coating particles, so as to solve the problems of mis-binding, pre-curing, high scrap rate and high cost in the existing heat binding method

Method used

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  • Normal-temperature binding preparation method of powder coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. The preparation mass fraction is 100g of polyvinyl alcohol (PVA1788) solution of 2%;

[0031] 2. Prepare a borax solution with a mass fraction of 5%, take 1 g of the borax solution, slowly add it to the stirring polyvinyl alcohol solution (prepared in step 1), and continue stirring for 10 minutes at a stirring speed of 2000 rpm;

[0032] 3. Mix metal aluminum powder, artificial zeolite powder with a particle size of 1-2 microns, and the solution obtained in step 2 in a mass ratio of 3:1:6 in a mixer at a low speed for 30 seconds at a stirring speed of 300 rpm to prepare a metal powder wet material mixture ;

[0033] 4. Stir the polyester-TGIC powder coating base material and the metal powder wet material mixture obtained in step 3 at a mass ratio of 97:10 in a mixer at a low speed for 60 seconds at a stirring speed of 200 rpm;

[0034] 5. The mixture obtained in step 4 is dispersed and dried instantly with an airflow mixer at an air pressure of 0.1 MPa, and the boun...

Embodiment 2

[0038] 1. The preparation mass fraction is 100g of polyvinyl alcohol (PVA 1799) solution;

[0039] 2. Prepare a borax solution with a mass fraction of 10%, take 1 g of the borax solution, slowly add it to the stirring polyvinyl alcohol solution (prepared in step 1), and continue stirring for 10 minutes at a stirring speed of 2000 rpm;

[0040] 3. Mix metal aluminum powder, artificial zeolite powder with a particle size of 1-2 microns, and the solution obtained in step 2 in a mass ratio of 4:1:6 in a mixer at a low speed for 60 seconds at a stirring speed of 300 rpm to prepare a metal powder wet material mixture ;

[0041] 4. Stir the polyester-TGIC powder coating base material and the metal powder wet material mixture obtained in step 3 at a mass ratio of 96:11 in a mixer for 60 seconds at a low speed, and the stirring speed is 200rpm;

[0042] 5. The mixture obtained in step 4 is dispersed and dried instantly with an airflow mixer at an air pressure of 0.1 MPa, and the bound...

Embodiment 3

[0046] 1. The mixture obtained in steps 1-4 in Example 1 was mixed with a high-shear mixer (rotating speed 2000r / min) for 1 minute, and then naturally volatilized and dried in the air for 5 hours to obtain a bound product;

[0047] 2. The prepared bound products were scanned by electron microscope and sprayed on board respectively.

[0048] The metal powder is well bound to the powder coating particles; when the spraying voltage is 30kV and 90kV respectively, the measured metal powder content in the upper plate powder is 3.29% and 2.82%, which is different from the original addition of 3.00% metal powder The quantity is basically the same.

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Abstract

The invention discloses a normal-temperature binding preparation method of powder coating, and relates to the field of preparation of powder coating. The normal-temperature binding preparation method comprises the following steps of coating metal-effect pigments of metal powder or mica powder by water-soluble resin, adding into a powder coating system, and binding with the particles of the powder coating. Proofed by the testing results, the powder coating product bound by the method can reach the binding effect of the current industrial heat binding method, the film coating property exceeds the level of the current industrial heat binding product, and the metal powder and the powder coating are successfully bound at normal temperature. The normal-temperature binding preparation method has the advantages that by adopting the water-soluble resin to coat the metal-effect pigment, the pollution by solvent is avoided; the use of expensive heat binding equipment is avoided, the binding temperature is greatly lowered, the binding cost is reduced, and the problems of pre-curing, false binding between powder coatings, high rate of defective products, high cost and the like in the prior art are solved; the suitability is wide, and the method is widely applied to the binding of metal powder or non-metal powder and various powder coatings.

Description

technical field [0001] The invention relates to the field of powder coating preparation, and more specifically relates to a normal-temperature binding preparation method of powder coatings. Background technique [0002] Powder coating has been widely used due to its eco-friendly, excellent film appearance, low cost and low energy consumption. Among them, metal powder coatings and imitation metal glitter effect powder coatings are widely used in high-end industrial products such as automobiles, home appliances, mobile phones and instruments because they can provide gorgeous dot flashes, multi-color effects and outstanding protection functions. The market for such powder coatings has witnessed rapid growth due to their excellent properties. [0003] Metal powder coatings and imitation metal flash effect powder coatings are formed by adding metallic pigments or imitation metal pigments to achieve the colorful and gorgeous appearance. At present, the commonly used metal pigment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D5/03C09D7/12
CPCC08K2003/0812C09D5/033C09D5/035C09D167/00C08L29/04C08K9/10C08K3/08C08K7/26
Inventor 张辉祝京旭
Owner 天津西敦粉漆科技有限公司
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