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Preparation method of film-forming material for low-temperature-curing powder paint

A film-forming substance, powder coating technology, applied in powder coatings, polyester coatings, coatings, etc., can solve the problem of high curing temperature and achieve the effect of simple preparation method

Inactive Publication Date: 2015-09-16
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

[0038] After the preparation of the film-forming material is completed, the filler, photocatalyst, and auxiliary can be further added at 70~90℃. When the auxiliary contains a coupling agent, the order of addition can be as follows: Adding fillers, adding other additives, and finally adding photocatalysts. Stir evenly and cool to room temperature or further freeze and crush to obtain low-temperature solidified powder coatings.

[0039] The raw materials used in the above process are purchased analytical products in the present invention. In practical applications, industrial products with higher purity can be purchased, or various raw materials with less impurity content can be prepared by themselves. During the reaction, the four-necked flask needs to be connected with a nitrogen delivery device, a temperature measuring device, a stirring device, and a reflux condenser. During the reaction, the sealing degree of the system is strictly controlled, because some ingredients in the ra...

Embodiment 1

[0042] Add 225g terephthalic anhydride, 150g maleic anhydride, and 61g 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 pentadiene to the four-necked flask Alcohol, 64g diethylene glycol, heated to 190℃ under nitrogen atmosphere, and reflux and stir at constant temperature for 1h, then vacuum the four-necked flask, continue to stir at 190℃ under constant temperature and reflux for 3h; then fill the flask Nitrogen, add 41g of phthalic ether and 66g of hydroquinone, lower the temperature to 170°C in a nitrogen atmosphere, and stir at constant reflux for 20min; then stop heating, and when the temperature drops to 130°C, add to it under a nitrogen atmosphere Add 293g of styrene and 27g of ethanolamine, stir well and complete the preparation of the film-forming material.

Embodiment 2

[0044] Put 440g terephthalic anhydride, 150g maleic anhydride, 91g TPC into a four-necked flask, heat to 190°C under a nitrogen atmosphere, and stir at constant reflux for 40min; then add 94g pentanediol, 95g of diethylene glycol, heated to 210°C under nitrogen atmosphere, and stirred at constant reflux for 1 hour, then vacuumed the four-neck flask, and continued stirring at 210°C under constant reflux for 2 hours; then filled the flask with nitrogen, And add 41g of phthalic ether and p-88g of hydroquinone, lower the temperature to 180°C in a nitrogen atmosphere, and stir at constant reflux for 30min; then stop heating, when the temperature drops to 135°C, add to it under a nitrogen atmosphere 458g of methyl methacrylate and 42g of ethanolamine are stirred uniformly to complete the preparation of the film-forming material.

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Abstract

The invention discloses a preparation method of a film-forming material of a low-temperature-curing powder paint. The invention relates to the field of paints, and especially relates to the field of powder paints. The film-forming material of the low-temperature-curing powder paint comprises main resin and curing resin. The main resin is obtained by synthesizing phthalic anhydride, pentanediol, diethylene glycol, maleic anhydride, veratrole, hydroquinone and terephthaloyl chloride. The curing resin is a mixture of ethanolamine and one or two selected from styrene or methyl methacrylate. The main resin and the curing resin are mixed, such that the film-forming material is obtained. Further, a photocatalyst, a filling material and additives are added into the film-forming material, such that the low-temperature-curing powder paint is obtained. The low-temperature-curing powder paint can be cured under a low temperature or under ultraviolet irradiation. The preparation method is convenient, and the curing temperature is low. The paint is green and environment-friendly.

Description

Technical field [0001] The invention belongs to the field of coatings, in particular to the field of low-temperature curing powder coatings. Background technique [0002] Powder coating is a type of coating that does not contain solvent 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 film-forming resin 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 temperatures, nor will it dissolve in different solvent environments, so it has better physical and chemical properties than thermoplastic powder coatings. Based on this, thermosettin...

Claims

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Application Information

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IPC IPC(8): C09D167/06C09D151/08C09D5/03C09D7/12C08G63/676C08F283/01
Inventor 黄波
Owner CHENGDU NASHUO TECH
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