High-temperature-resistant coating polyester modified silicon resin in air fryer and preparation method of polyester modified silicon resin

The invention discloses polyester modified silicon resin for an internal high-temperature-resistant coating of an air fryer and a preparation method of the polyester modified silicon resin. The polyester modified silicon resin is prepared from neopentyl glycol, benzoic acid, pentaerythritol, trimethylolethane, trimethylolpropane, phthalic anhydride, trimellitic anhydride, hexahydrophthalic anhydride, isophthalic acid, 2, 2, 6-trimethyl-1, 3-pentanediol and a solvent. The coating is prepared from the following raw materials: 2, 2-dimethylolpropionic acid, dibutyltin dilaurate, monobutyltin oxide, propylene glycol methyl ether acetate, n-butyl alcohol, xylene, an organic silicon intermediate, methyltriethoxysilane, phenyltrimethoxysilane, isopropyl titanate and the like. Through a large number of experimental screening, a system with the optimal hydroxyl and carboxyl ratio is optimized by adopting a positive-pressure high-temperature melt polymerization process, and then the polyester modified silicon resin wit