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Photocuring powder coating

A technology of powder coating and photocuring, which is applied in the direction of powder coating, polyester coating, coating, etc., can solve the problem of high curing temperature, and achieve the effect of simple preparation method

Inactive Publication Date: 2015-08-26
CHENGDU NASHUO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although thermosetting powder coatings have the advantages of energy saving, environmental protection, heat resistance and solvent resistance of the coating film, compared with solvent-based coatings, they require a higher curing temperature (180 ° C ~ 200 ° C), which is not conducive to Wide range of applications on different materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0044] After the preparation of the film-forming substance is completed, further add coupling agent, filler, leveling agent, and photocatalyst to it at 70-90°C, stir and cool to room temperature or further freeze and pulverize to obtain light-cured powder coating.

[0045] The raw materials used in the above process are purchased analytically pure articles in the present invention. In actual application, industrial articles with higher purity can be purchased, and various raw materials with less impurity content can also be prepared by themselves. During the reaction process, the four-neck flask needs to be connected with a nitrogen delivery device, a temperature measuring device, a stirring device and a reflux condensing device. During the reaction process, the sealing degree of the system is strictly controlled, because some components in the raw materials are easily oxidized when the reaction is not complete. The prepared light-cured powder coating has a glass transition te...

Embodiment 1

[0048]Add 225g of terephthalic anhydride, 150g of maleic anhydride, and 61g of TPC into a four-necked flask, heat to 180°C under a nitrogen atmosphere, and reflux and stir at a constant temperature for 20 minutes; then add 32g of pentadiene to the four-necked flask Alcohol, 64g of diethylene glycol, heated up to 190°C under a nitrogen atmosphere, and stirred at constant temperature for 1h, then vacuumed the four-necked flask, and continued to stir at 190°C for 3h; then filled the flask with Nitrogen, add 41g o-phthalene dimethyl ether and p-66g hydroquinone, lower the temperature to 170°C in a nitrogen atmosphere, and reflux at a constant temperature for 20min; then stop heating, when the temperature drops to 130°C, pour it under a nitrogen atmosphere Add 293g of styrene and 27g of ethanolamine, and stir evenly to complete the preparation of the film-forming substance.

Embodiment 2

[0050] Add 440g of terephthalic anhydride, 150g of maleic anhydride, and 91g of TPC into a four-necked flask, heat to 190°C under a nitrogen atmosphere, and stir at constant temperature for 40 minutes; then add 94g of pentylene glycol, 95g of diethylene glycol, heated up to 210°C under a nitrogen atmosphere, and stirred at constant temperature for 1 hour, then evacuated the four-necked flask, and continued to stir at 210°C for 2 hours; then filled the flask with nitrogen, And add 41g of phthalein dimethyl ether and p-88g of hydroquinone, lower the temperature to 180°C in a nitrogen atmosphere, and stir at constant temperature for 30min; then stop heating, and when the temperature drops to 135°C, add to it in a nitrogen atmosphere 458g of methyl methacrylate and 42g of ethanolamine were stirred evenly to complete the preparation of the film-forming substance.

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PUM

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Abstract

The invention discloses a photocuring powder coating and belongs to the field of coatings, in particular to the field of photocuring powder coatings. The photocuring powder coating comprises a film forming substance, a photocatalyst, filler and an auxiliary, wherein the film forming substance comprises matrix resin and curing resin, the matrix resin is prepared through chemical reaction synthesis of raw materials of p-phthalic anhydride, pentanediol, diethylene glycol, maleic anhydride, o-dimethoxybenzene, p-dihydroxybenzene and paraphthaloyl chloride, the matrix resin and the curing resin are mixed to form the film forming substance, the photocatalyst, the filler and the auxiliary are added to the film forming substance, and the photocuring powder coating is obtained. The photocuring powder coating can be cured under ultraviolet light and is convenient to prepare and environment-friendly.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to the field of light-cured powder coatings. Background technique [0002] Powder coating is a type of coating that does not contain solvents in its components. It basically does not produce volatile organic compounds (VOC) during use, and has minimal pollution to the environment. It is an energy-saving and environmentally friendly coating. Powder coatings generally include thermoplastic powder coatings and thermosetting powder coatings. If the resin used as a film-forming substance in the coating is a thermoplastic resin, it is a thermoplastic powder coating. If the resin is a thermosetting resin, it is a thermosetting powder coating. In thermosetting powder coatings Once the resin is cured, the coating will not melt at high temperature and will not dissolve in different solvent environments, so it has better physical and chemical properties than thermoplastic powder coatings. Based on this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/06C09D5/03C09D7/12C08G63/52C08G63/78
Inventor 黄波
Owner CHENGDU NASHUO TECH
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