A kind of fast curing powder coating and preparation method thereof

Abstract

The invention relates to the field of powder coatings, in particular to a fast-curing powder coating and a preparation method thereof. The powder coating comprises a polyester mixture and an amino resin mixture; the polyester mixture is: polyarylate, polyterephthalene Butylene formate, polyethylene micropowder wax, microcrystalline cellulose, polyvinyl acetate, liquid silicone rubber, nano-silica agglomerates, barium sulfate, melamine formaldehyde resin; the amino resin mixture is: urea-formaldehyde resin, isoamyl Rubber, rare earth oxides, matte calcium carbonate, polyacrylonitrile, nano-titanium dioxide, polyvinylidene fluoride resin. The coating of the invention has high surface energy receiving efficiency, rapid curing, good mechanical strength and wide application range.

Description

technical field [0001] The invention relates to the field of powder coatings, in particular to a fast-curing powder coating and a preparation method thereof. Background technique [0002] Powder coatings are solid powder synthetic resin coatings composed of solid resins, pigments, fillers and additives. Unlike ordinary solvent-based coatings and water-based coatings, its dispersion medium is not solvent and water, but air. It has the characteristics of no solvent pollution, 100% film formation and low energy consumption. There are generally two ways to cure powder coatings. The first is thermal curing, that is, using high infrared or thermal convection technology to heat and melt powder coatings. The curing temperature of this method is high, and it is not suitable for the medium that needs to be cured at low temperature. The second is UV curing. After adding a photoinitiator, the free radicals or anions and cations generated by UV light are used to achieve the curing of p...

AI Technical Summary

Problems solved by technology

However, most of the existing coatings have a long curing time and are difficult to meet the current performance requirements. Therefore, research on the rapid curing of powder coatings has become a new direction for the development of coatings.

[0003] There are many studies on fast-curing coatings in the current technology, most of which take into account the environmental tolerance of coatings, but there is still room for improvement

For example, the patent number is CN201710971232.5, a method of using photothermal effect to realize rapid curing of powder coatings. By mixing and pulverizing photothermal conversion fillers and resins, the pulverized powder coatings are evenly placed on the substrate. The substrate used is Glass, aluminum sheet or steel plate; select the light source to irradiate the powder coating to reach a curing temperature of 60-330°C to cure the powder coating, but it is difficult to take into account the molding process of the coating during the curing, resulting in a decline in the performance of the coating after spraying; another example is the patent number CN201610993976 .2 a high-speed infrared curing leveling powder coating and preparation method thereof, the components of the powder coating include polyester resin, curing agent, leveling agent, benzoin, inorganic filler, wax powder and pigment, but it selects a single resin , under the premise of fast film formation, the environmental tolerance is not high

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