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Preparation method of powder coating containing calcium carbonate

A powder coating, calcium carbonate technology, applied in powder coatings, polyester coatings, coatings, etc., can solve the problem of high curing temperature, and achieve the effects of improving mechanical properties, convenient preparation and smooth surface

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

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.

Embodiment 3

[0052] Add 440g of terephthalic anhydride, 150g of maleic anhydride, and 61g 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 454g of methyl methacrylate and 30g of ethanolamine were stirred evenly to complete the preparation of the film-forming substance.

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Abstract

The invention discloses a preparation method of a powder coating containing calcium carbonate and belongs to the field of coatings, in particular to the field of powder coatings. The powder coating containing calcium carbonate comprises a film forming substance, filler and an auxiliary, wherein the film forming substance comprises matrix resin and curing resin; the matrix resin is prepared through synthesis of p-phthalate anhydride, pentanediol, diethylene glycol, maleic anhydride, o-dimethoxybenzene, p-dihydroxybenzene and paraphthaloyl chloride; the curing resin is a mixture of one or two of styrene and benzene methacrylate with ethanolamine, and the film forming substance is formed by the matrix resin and the curing resin; calcium carbonate and the auxiliary are added to the film forming substance, and the powder coating containing the calcium carbonate can be prepared. The photocuring powder coating is convenient to prepare and environment-friendly, can be cured at lower temperature and has excellent mechanical performance.

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 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. Ba...

Claims

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Application Information

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IPC IPC(8): C09D167/06C09D5/03C09D7/12C08G63/676
CPCC09D167/06C08G63/676C09D5/03C09D7/61C09D7/65C08L33/12C08K2003/265
Inventor 黄波
Owner CHENGDU NASHUO TECH
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