▎ 摘　　要

NOVELTY - Powder coating composition is prepared by (a) adding 56-65 wt.% outdoor saturated polyester resin, 3-3.4 wt.% hydroxyalkylamide curing agent, 1-1.5 wt.% smoothing degassing agent, 1-1.5 wt.% leveling agent, 26.6-38.5 wt.% pigment filler and 0.5-2 wt.% modified graphene to a mixing cylinder, and premixing, (b) performing melt extrusion on pre-mixed raw materials, tableting, crushing using a twin-screw extruder, where the temperature of zone (I) in extruder is carried out at 105-115 degrees C, and the temperature of zone (II) in extruder is carried out at 110-120 degrees C, and (c) grading and crushing the crushed sheet material using an air classifying mill, where the particle size of the powder is 15-60 mu m, and sieving using a rotary sieve to obtain the powder coating composition, where the sieve used in rotary sieve is 200 mesh. USE - The composition is useful for outdoor facilities coating in coastal areas. ADVANTAGE - The composition has high salt, excellent fog resistance and low-toxic content, and is safe and environmentally-friendly.