High-weather-resistance unsaturated polyester resin and preparation method thereof

The invention is suitable for the technical field of unsaturated polyester resin, and provides high-weather-resistance unsaturated polyester resin and a preparation method thereof. The polyester resin is prepared from the following raw materials in parts by weight: 180 to 280 parts of unsaturated binary acid, 200 to 300 parts of dihydric alcohol, 300 to 500 parts of styrene, 0.05 to 0.15 part of a polymerization inhibitor, 1 to 3 parts of a catalyst, 6 to 14 parts of modified aerogel, 4 to 12 parts of nano titanium dioxide and 5 to 15 parts of modified nano zeolite powder. The modified nano zeolite powder is good in mechanical property, good in dispersity and compatibility and capable of being fully adsorbed and combined with other components to form a stable three-dimensional network structure, the weather resistance of the unsaturated polyester resin is improved, the modified nano zeolite powder is added, a stable porous structure is formed on the surface of the modified nano zeolite powder, the surface are