▎ 摘　　要

NOVELTY - Weather-resistant and high-temperature-resistant powder coating composition comprises polyester resin, organic silicone resin, acrylic resin, graphene modified resin, curing agent and other additive. The organic silicone resin comprises phenyl and methyl groups, and the polyester resin is saturated polyester resin. USE - Weather-resistant and high-temperature-resistant powder coating composition used for outdoor places ADVANTAGE - The powder coating has excellent storage stability and mechanical property of film layer, and solves the problem of poor thermal stability of polyester resin, increases mechanical property of film, and improves heat resistance, strengthening and toughening. The prepared modified polyester resin improves glass transition temperature and decomposition temperature, and excellent stability and heat resistance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of weather resistant and high-temperature-resistant powder coating composition, which involves adding polyester resin, organic silicone resin, acrylic resin, graphene modified resin, curing agent and other additives into mixing cylinder, premixing for 3-5 minutes, extruding and tableting on an extruder, crushing sheet materials, screening coarse powder using rotary screen to obtain powder coating with 20-50 µm of fine powder as a final product, spraying powder coating to the thickness of 60-80 µm film through an electrostatic spray gun, and baking in a baking chamber at the baking temperature of 200 ℃ for 10-15 minutes. The extruder has zones (1-2) at 100℃ and 110℃.