An Investigation on Thermal Behaviour of Epoxy-polyester Powder Coating

In recent years, powder coating has established its status as a pollution-free, resource-saving coating, and has increased its quantity of production steadily [1]. The outside appearance isits biggest problem. To improve the outside appearance and melt flow, acrylic additives are needed [2]. In this paper thedifferent effect of acrylate additive as a flowing agent in an epoxy/polyester hybrid powder coating system was evaluatedby means of Differential Scanning Calorimetry (DSC), the thermal degradation of these systems were investigated by TGA. Also, the effect ofacrylate additive on gelation timewhich is important in processing and curing of powder coating, is studied.