High temperature-resistant ultralow temperature-cured epoxy polyester powdery coating

The invention discloses a high temperature-resistant ultralow temperature-cured epoxy polyester powdery coating. The high temperature-resistant ultralow temperature-cured epoxy polyester powdery coating solves the problem that the existing low temperature-cured epoxy polyester powdery coating has poor heat resistance and poor thermal conductivity so that in curing, temperatures in a coating film prepared from the existing low temperature-cured epoxy polyester powdery coating are not different and coating curing rates are not different and thus the coating film produces orange peel phenomenon and even crazes and coating film surface-effects are influenced. The high temperature-resistant ultralow temperature-cured epoxy polyester powdery coating is prepared from 30 to 40wt% of epoxy resin, 15 to 20wt% of polyester resin, 0.5 to 1.5wt% of polyarylene sulfide resin, 10 to 15wt% of titanium dioxide, 2 to 5wt% of nano-metal powder subjected to surface treatment, 0.5 to 1wt% of dibutyltin dilaurate, 1 to 3wt% of an assistant, 1 to 5wt% of sodium fluoride, 15 to 20wt% of a filling material and 10 to 15wt% of a pigment. The high temperature-resistant ultralow temperature-cured epoxy polyester powdery coating has a low curing temperature, good heat resistance, and physical and mechanical properties and chemical resistance satisfying industrial requirements.