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Preparation method of powder coating

A technology of powder coatings and coatings, which is applied in the direction of powder coatings and coatings, and can solve the problems of high cost and immature preparation technology of powder fluorocarbon coatings

Active Publication Date: 2014-02-26
JIANGSU KAOPULE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Almost all fluorocarbon coatings commonly used in the market are liquid coatings, and the cost of powder fluorocarbon coatings is significantly higher than that of liquid coatings due to immature preparation technology

Method used

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  • Preparation method of powder coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] With modified nano-titanium dioxide 150g, 700 grams of polyvinylidene chloride (Shanghai East Fluorine Chemical Technology Co., Ltd., T-1), 280 grams of acrylic resin based on methyl methacrylate, butyl acrylate and methacrylic acid ( Shanghai Dongfu Chemical Technology Co., Ltd., FA), 120 grams of 2,6-toluene diisocyanate, mixed with 670 grams of xylene, 620 grams of isophorone, 110 grams of dimethyl phthalate, 70 grams of diethylene glycol In monobutyl ether solvent, ball mill at 900 rpm for 1.5 hours. Ultrasonic dispersion for 75 minutes, the ultrasonic frequency is 25Hz, until the particle size reaches below 10 microns, the obtained liquid mixture is vacuum freeze-dried for 2.5 minutes, the vacuum pressure is kept at 0.3Kpa, the obtained solvent is recovered and reused, and the obtained powder is collected by a cyclone separator. Powder coating products are available.

Embodiment 2

[0040] With modified nano-titanium dioxide 150g, 700 grams of polyvinylidene chloride (Shanghai East Fluorine Chemical Technology Co., Ltd., T-1), 280 grams of acrylic resin based on methyl methacrylate, butyl acrylate and methacrylic acid ( Shanghai Dongfu Chemical Technology Co., Ltd., FA), 120 grams of 2,6-toluene diisocyanate mixed with 670 grams of xylene, 620 grams of isophorone, 110 grams of dimethyl phthalate, 70 grams of diethylene glycol mono In butyl ether solvent, ball mill at 1200 rpm for 1 hour. Ultrasonic dispersion for 75 minutes, the ultrasonic frequency is 25Hz, until the particle size reaches below 10 microns, the obtained liquid mixture is subjected to vacuum freeze-drying for 2.5 minutes, the ultrasonic frequency is 25Hz, the vacuum pressure is kept at 0.3Kpa, the obtained solvent is recovered and reused, and the obtained powder is passed through The powder coating product can be obtained after being collected by the cyclone separator.

Embodiment 3

[0042] With modified nano-titanium dioxide 150g, 700 grams of polyvinylidene chloride (Shanghai East Fluorine Chemical Technology Co., Ltd., T-1), 280 grams of acrylic resin based on methyl methacrylate, butyl acrylate and methacrylic acid ( Shanghai Dongfu Chemical Technology Co., Ltd., FA), 120 grams of 2,6-toluene diisocyanate mixed with 670 grams of xylene, 620 grams of isophorone, 110 grams of dimethyl phthalate, 70 grams of diethylene glycol mono In butyl ether solvent, ball mill at 2200rpm for 1 hour. Ultrasonic dispersion for 75 minutes, the ultrasonic frequency is 25Hz, until the particle size reaches below 10 microns, the obtained liquid mixture is vacuum freeze-dried for 2.5 minutes, the vacuum pressure is kept at 0.3Kpa, the obtained solvent is recovered and reused, and the obtained powder is collected by a cyclone separator. Powder coating products are available.

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Abstract

The invention relates to a preparation method of a powder coating. The method comprises the following steps of: (1) dissolving a coating composition into a solvent to form a liquid mixture; (2) performing high-speed ball milling on the liquid mixture; (3) ultrasonically dispersing the coating treated by high-speed ball milling; and (4) performing vacuum freeze drying on the ultrasonically-dispersed coating composition. In the method, a vacuum freeze drying method is adopted, so that powder of the powder coating is prevented from being agglomerated in a drying process, the particle size is not increased in the drying process, and the particle size of the obtained powder coating is smaller than 10 microns.

Description

technical field [0001] The invention relates to a method for preparing a coating, in particular to a method for preparing a powder coating. Background technique [0002] Powder coating is a rapidly developing coating variety, which has the advantages of energy saving, environmental protection, and no pollution of three wastes. However, there are still some limitations in the application of powder coatings. The two major disadvantages are that the smooth coating surface and thin coating thickness of liquid coatings cannot be obtained, which limits the use of powder coatings on many high-end products. Surface unevenness The coating is too thick due to the particle size of the powder coating being too large. The production of submicron fine powder coatings with a particle size below 10 microns can overcome the shortcomings of uneven surfaces and too thick coatings. For this reason, the refinement of powder coatings has attracted great interest of scientific and technological ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/03C09D127/08C09D7/12
Inventor 纪志勇张丽娟陶月明李昊耿雷韩静香徐瑞芬
Owner JIANGSU KAOPULE NEW MATERIALS
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