Preparation method for low-temperature curing composite resin powder coating

A composite resin and powder coating technology, used in the coating field, can solve the problems of high curing temperature and long curing time, and achieve the effects of low melting temperature, strong mechanical properties of the coating film and good storage stability

Inactive Publication Date: 2019-07-23
江苏海獭新材料科技有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Technical problem to be solved by the present invention: Aiming at the problems of high curing temperature and long curing time of existing thermosetting powder coatings, a preparation method of low-temperature curing composite resin powder coatings is provided

Method used

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Embodiment Construction

[0039] In parts by weight, weigh 40~60 parts of neopentyl glycol, 20~30 parts of ethylene glycol, 20~30 parts of terephthalic acid, 10~15 parts of isophthalic acid, and 10~15 parts of hexamethylene glycol. Acid, 8~12 parts of glycidyl ether, 4~6 parts of trimellitic anhydride, 2~3 parts of pyromellitic anhydride, 2~3 parts of trimethylolpropane, 0.4~0.6 parts of antioxidant 1010, neopentyl glycol , Ethylene glycol, isophthalic acid, terephthalic acid, adipic acid, and glycidyl ether are added to the reaction kettle, and nitrogen protection is introduced at a gas flow rate of 40-50mL / min, and the temperature is raised at a heating rate of 5℃ / min To 240~250℃, stir and react at 180~200r / min for 20~30min to obtain a polymer intermediate. The polymer intermediate is cooled to 180~190℃ at a cooling rate of 2℃ / min, and trimellitic anhydride and homogenate are added. Pyromellitic anhydride and trimethylolpropane were stirred at 180~200r / min to react for 40~60min to obtain the end-cappe...

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Abstract

The invention relates to a preparation method for a low-temperature curing composite resin powder coating, and belongs to the technical field of coatings. Terminal carboxyl polyester resin and epoxy resin are taken as raw materials to prepare the low-temperature curing composite resin powder coating. Since the terminal carboxyl polyester resin and the epoxy resin are compounded, the low-temperature curing of the resin powder coating can be effectively realized, power coating application is not limited to the coating of the surface of a thermal-resistance base material, a possibility for applying the power coating to the surface coating film of a thermosensitive base material is greatly increased, the preparation method performs a great function for expanding the application range and the application field of the powder coating, the curing temperature of the low-temperature curing powder coating is low, the cost generated in a baking link in a production process is lowered, the consumption of energy is greatly reduced, resources are saved, the curing time is shortened while the mechanical property of the coating film is guaranteed, a production period is shortened, the production efficiency is improved, and economic benefits are increased.

Description

Technical field [0001] The invention relates to a preparation method of a low-temperature curing composite resin powder coating, which belongs to the technical field of coatings. Background technique [0002] Powder coatings are mainly solid powders mixed with resins, curing agents, pigments, fillers, additives, etc., which are coated on the surface of the object by electrostatic spraying, and then baked to melt and level, and solidify into a film . Because it does not contain any organic solvents, pollution-free, high utilization rate, low energy consumption, and simple process, it has become the recognized "4E" (high production efficiency, excellent film performance, eco-friendly, economical) coatings. According to different resin types, powder coatings can be divided into two categories, one is thermoplastic powder coatings prepared from thermoplastic resins, and the other is thermosetting powder coatings prepared from thermosetting resins. Because thermoplastic powder coati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D163/00C09D161/28C09D7/61C09D7/63C09D5/03
CPCC08K2003/2241C08K2003/3045C09D5/033C09D167/00C08L63/00C08L61/28C08K3/30C08K3/22C08K5/42
Inventor 石雅琴
Owner 江苏海獭新材料科技有限公司
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