1. Better pigment dispersion
2. Optimized appearance
3. Reduction of paint film defects such as shrinkage
4. Stable coating formulations
5. Easy to incorporate
6. No VOC effect, HAPS free
7. Cobalt-free coating accelerator
8. Defoamer for lubricants and metalworking fluids
9. Universal additive for solvent-borne and water-borne coatings
Because the defoaming mechanism in water-based and solvent-based coatings is not exactly the same as that in powder coatings, the defoaming agent in water-based and solvent-based coatings cannot be directly used in powder coatings. Due to the particularity of the powder coating system, there are not as many defoamers used in powder coatings as water-based paints and solvent-based coatings. At present, the commonly used defoamers in powder coatings are: defoamer YPE from Hubei Hongtu Chemical Products Co., Ltd. , It is a white fluid powder, melting point is 134~140℃, volatile content is less than 0.3%, and the amount added is 0.5%~0.8% of the total formula. It is dispersed by melt extrusion mixing method. Hangzhou Zhongshun Chemical Industry and Trade Co., Ltd. The common defoamer ZS601 is a white powder, the dosage is about 1%~2% of the total formula: the defoamer ZS601-1, the dosage is about 1.5% of the total formula; the high-efficiency defoamer ZS-603 is a white powder , It is suitable for eliminating the phenomenon of powder spraying and blistering of cast iron, cast aluminum and galvanized parts. The dosage is 2%~2.5% of the total formula, all of which are dispersed by melt extrusion mixing method. The defoaming agent HW-601 of Hangzhou Hongwei Chemical Industry and Trade Co., Ltd. is a white powder, and the amount is about 2% of the total formula. It is dispersed by melt extrusion mixing method.
This defoamer can not only eliminate the pores formed by the moisture content of the powder coating itself, but also eliminate the pores caused by the moisture in the cast iron, cast aluminum and galvanized parts, and can also improve the dry powder fluidity and coating film of the powder coating. The leveling.
Matting agent and matting curing agent
In the powder coating formula, the matting agent is through physical action, and the matting curing agent is an auxiliary agent that makes the powder coating film matte through chemical reaction and physical action. The matting effect of the matting agent is mainly caused by the poor compatibility between the matting agent and the film-forming substance, which is mainly a physical effect. It is also effective to use matting fillers for physical matting, such as matting barium sulfate, kaolin, wollastonite powder, and mica powder. In addition, matting resins are also effective. The extinction range of this physical extinction method is relatively narrow, especially the extinction method with matting fillers, which is only applicable to the range of 60*gloss 60%~70%. When the amount of filler increases, the gloss of the coating film can decrease, but the flatness of the coating film Decrease, the mechanical strength also deteriorates, it is difficult to meet the appearance and performance requirements.
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