Special powder coating for super weather-resistant composite, and preparation method thereof, and coating method

A special powder coating for a weather-resistant composite, comprising components of, in percentages by mass:

• 40% to 48% of a modified acrylate, 20% to 24% of a polyester resin, 15% to 20% of an adduct derived from isophorone diisocyanate (IPDI), 0.1% to 0.8% of a texturing agent, 4.3% to 22.7% of a transparent filler powder, 0.8% to 1.2% of a pigment, 0.1% to 0.2% of a toughening agent, 0.1% to 0.3% of alumina, and 0% to 2% of a conductive agent, the components having a sum of mass percentages of 100%;
• wherein the modified acrylate is polyurethane acrylate;
• the adduct derived from IPDI is a polyisocyanate adduct with &-Caprolactam blocked NCO-groups;
• and
• the polyester resin is a saturated carboxyl polyester resin.