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Superfine powder paint and its prepn process

A technology of powder coating and manufacturing method, applied in powder coating and other directions, can solve the problems of high cost, uneven coating, difficult implementation, etc., and achieve the effect of good powder fluidization performance

Inactive Publication Date: 2005-12-14
辉旭微粉技术(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a practical ultra-fine powder coating and its manufacturing method, in order to solve the problems of prior art products such as uneven coating and too high thickness, complex manufacturing process, difficult implementation and high cost

Method used

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  • Superfine powder paint and its prepn process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 15 kg of mixed organic solvent (butanone:toluene:ethanol=70:25:5) into a 30-liter mixing tank, and then add the following substances under stirring:

[0032] Polyester resin 6.0kg DSM company 5900

[0033] Curing agent TGIC 0.50kg Vantieo T810

[0034] Benzoin 0.04kg Ningbo Nanhai Chemical Co., Ltd.

[0035] Titanium dioxide 3.4kg DuPont R960

[0036] Leveling agent 0.1kg Worlee PV88

[0037] Disperse at high speed for more than 30 minutes to detect the fineness. When the fineness reaches 50 microns or less, stop dispersing. The above liquid is atomized and granulated by aerosol. The heating air inlet temperature is 110 degrees, the outlet temperature is 50 degrees, and the spray pressure is 0.5. Adjust the atomization effect of the nozzle to make the obtained powder into a spherical shape with an average particle size of 18 microns. The product has good leveling performance. It is sprayed on the chromium pretreated aluminum plate by electrostatic spraying, and baked at...

Embodiment 2

[0039]Everything is as in Example 1, but the spray air pressure and the atomization effect of the nozzle are adjusted so that the particle size of the powder is 35 microns. The thickness of the coating obtained is 80 microns, and the surface of the coating is the same as that of conventional powder coatings, with larger orange lines.

Embodiment 3

[0041] As in Example 1, but adjust the spray air pressure to 0.6, and adjust the atomization effect of the nozzle, so that the particle size of the powder is 10 microns. Adding 1% of vapor-phase silicon monoxide and mixing uniformly, the obtained coating film thickness is 25 microns, and the coating surface is very flat.

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Abstract

The present invention relates to one kind of superfine powder paint and its preparation process, and aims at lowering the cost of coating and raising coating quality. The superfine powder paint has spherical grains of 10-25 micron size and consists of various resins, pigments and assistants, including powder fluidizing promoter of silica in 0.3-1.0 wt%. The preparation process includes dissolving powdered material inside organic solvent, high speed dispersing and grinding in grinding machine to obtain homogeneous liquid mixture, and pressurized spray drying to obtain the superfine powder paint. The superfine powder paint has excellent flowability and excellent covering capacity, and is mainly used in building, household appliance, furniture, automobile, etc.

Description

Technical field [0001] The invention relates to an ultrafine powder coating and a preparation method of the ultrafine powder coating. technical background [0002] Powder coating has the advantages of economy, high efficiency, environmental protection and energy saving (often called 4E: Economical, Efficient, Environmental, Energy Saving) and other advantages and has been developed rapidly, and it has completely replaced liquid coatings in many fields. [0003] Powder coatings are made of resin plus pigments and a small amount of additives as raw materials. They are usually mixed, heated, melted and extruded, then cooled and broken into small flakes, and then crushed into the required powder by a mechanical powder machine. When in use, the powder of the powder coating must be fluidized with gas in the fluidized bed equipment, and then sprayed on the metal parts with a charged spray gun. The metal parts are usually grounded or oppositely charged. In this way, the powder sprayed by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/03
Inventor 郭黎晓丁维娜刘兵许容朱盛军祁康法
Owner 辉旭微粉技术(上海)有限公司
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