Polyester intermediate containing benzophenone compound, preparation method and application

The invention discloses a polyester intermediate containing benzophenone compounds, which is prepared from the following ingredients in parts by weight: 18 to 23 parts of trimethylolpropane, 35 to 45 parts of adipic acid, 0 to 8 parts of tertiary carboxylic acid glycidyl ester, 0 to 8 parts of glycidyl methacrylate, 12 to 18 parts of 2, 2, 4, 4-tetrahydroxy benzophenone, 20 to 30 parts of methyl isobutyl ketone and 0.01 to 0.04 part of ester catalysts. A polyester intermediate with a weather-proof structure is prepared by adopting a reflux method, excessive hydroxyl and alcohol acid in the polyester intermediate are partially esterified and linked to prepare an alkyd resin matrix with a weather-proof structure, an acrylate monomer is introduced onto an alcohol acid molecule by adopting a double-bond copolymerization method, and meanwhile, a functional monomer is introduced into a molecular chain. Further, the water resistance and the weather resistance of the resin dispersion are improved. 本发明公开了一种含二苯甲酮类化合物聚酯