Method of preparing super weather-resistant haa-cured matte polyester resin and application thereof

A method of preparing a super weather-resistant HAA-cured matte polyester resin, the method comprising:

• sequentially adding polyol, dibasic acid and an esterification catalyst to a reaction container, so as to obtain a first solution;
• inputting a nitrogen gas into the reaction container;
• stirring the first solution, and at the same time, increasing a temperature of the reaction container;
• leaving the reaction container at 165-185° C. for reaction for 1-2 h;
• increasing the temperature of the reaction container to 240-250° C.;
• leaving the reaction container at 240-250° C. for reaction for 12-16 h, discharging water generated from an esterification reaction;
• when an acid value of the first solution reaches 5-20 mg KOH/g, adding an acidolytic agent to the first solution to obtain a second solution, leaving the second solution to undergo a reaction for 3-4 h;
• when an acid value of the second solution reaches 50-70 mg KOH/g, vacuumizing the reaction container, enabling the second solution to undergo a polycondensation reaction for 2-3 h;
• when the acid value of the second solution after undergoing the polycondensation reaction reaches 40-50 mg KOH/g, adding an onium salt curing accelerator and an antioxidant to the second solution to obtain a mixed second solution, stirring the mixed second solution for 20-40 min;
• obtaining the super weather-resistant HAA-cured matte polyester resin after the mixed second solution being discharging out of the reaction container and being cooled and crushed;
• wherein, the polyol is combination of neopentyl glycol and a triazine phenylimide diol monomer;
• a formula of the triazine phenylimide diol monomer is as follows:
• wherein the n is any integer of 4 to 8.