Cytec CYCAT 4040 catalyst is a p-toluenesulfonic acid catalyst used in electrophoretic coatings due to its hydrophobicity.CYCAT 4040 catalyst can be used in solvent and aqueous coatings to improve corrosion resistance. It is particularly suitable for electrostatic spraying because of its high electrostatic impedance. It can efficiently migrate and co-deposit with anodic electrophoretic coating systems, catalyzing the curing reaction of hydroxyl, carboxyl and amide functional groups with alkylated amino resins.
The commonly used power enhancers in powder coatings are the powder power enhancers AS90 and TL90 of Guangzhou Tianlong Chemical Co., Ltd. The main component of AS90 is the organic salt of the charged group, and the dosage is 0.05% to 0.4% of the total formula. The amount of addition for different purposes is different. When the powdering rate needs to be greatly increased, the amount of people added is 0.1%~0.2%, and the amount of people added is 0.05%~0.1% when the powdering rate of the dead corner is solved. To 0.2%~0.3%, disperse by melt extrusion mixing method. Hubei Hongtu Chemical Products Co., Ltd.’s powder power enhancer EDI also has the same effect. The dosage is 0.05% to 0.4% of the total formula, and it is dispersed by melt extrusion mixing method. Hangzhou Zhongshun Chemical Industry and Trade Co., Ltd.’s powder power enhancer ZS-705, which increases the powder charge during powder spraying and improves the powder loading rate. The dosage is 0.3%~0.5% of the total formula. It is dispersed by melt extrusion mixing method. In addition, the high-efficiency power-increasing agent ZS-706 has a better power-increasing effect than ZS-705, and the dosage is about 0.5% of the total formula, and it is dispersed by the melt-extrusion mixing method. There is also Texa quart 900 from Haichuan Chemical. The dosage is 0.3%~0.5% of the total formula, and it is dispersed by internal addition.
Tribo-charger is an additive added to improve the tribo-charge performance of powder coatings, increase the amount of charge of powder coatings, and increase the powdering rate of powder coatings during friction electrostatic powder spraying. Most powder coatings are applied by electrostatic powder coating method. In the electrostatic powder spraying method, one uses the corona discharge method to charge the powder coating with static electricity, and the other uses the friction charging method to charge the powder coating with static electricity. Among them, the powder coating of the friction charging method is easily affected by the powder. The effect of the variety and structure of coating resins, general epoxy powder is easy to charge, polyester epoxy and TGI C-curing polyester powder coatings have poor tribo-charge performance. If you want to use polyester epoxy and TGI C-curing polyester powder coatings When used in friction electrostatic spraying, a friction charging agent must be added to the powder coating formulation. If the resin wax manufacturer has already added this additive to the polyester resin, it is not necessary to add a friction charging agent. The technical indicators of the TB series of frictional electrification agents produced by Ningbo Nanhai Chemical Co., Ltd. are shown in Table 25-14, and they are dispersed by melt extrusion mixing method.
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