Carboxylabyl polyester resin (A, B, C, D, E, F): industrial grade, imported; Curing agent (A, B, C, D): industrial grade, commercially available; Powder general additives (benzoin, leveling agents, hardening agents, ultraviolet absorbers): industrial grade, commercially available. 1.2 Main Equipment

 1.3 Powder coating and coating preparation

 2.1 Effect of different polyester resins on the appearance and properties of transparent powders

 Table 1 Results of powder coating properties prepared by different polyester resins

The main curing agents commonly used in polyester powder coatings are triglycidyl isocyanurate (TGIC) and hydroxyalkylamide (HAA), and the effects of several curing agents on the coating properties of pure polyester clear powder coatings are investigated in Table 2.

 2.3 Effect of leveling agent on the appearance and properties of transparent powder

On this basis, the rational dosage of leveling agent in the formulation system was studied, and the specific performance results are shown in Table 4.