Novel aqueous urethane acrylate copolymer system and preparation method thereof

The invention provides a novel aqueous urethane acrylate copolymer system and a preparation method thereof, which belong to the technical field of environment-friendly type aqueous material preparation. According to the invention, an aqueous polyurethane prepolymer and acrylic acid ester are linked by a chemical bond, a core-shell aqueous urethane acrylate copolymer is obtained, wherein, aqueous polyurethane is taken as a shell, and polyacrylate is taken as a core. The performance advantage superposition of the aqueous polyurethane and acrylic acid ester is realized. A core-shell heterogeneous structure can effectively increase the mechanical properties of a glue membrane under condition of unchanged raw material composition and usage amount, the glue membrane has the advantages of high hardness and high elasticity, can improve the film-forming performance of an emulsion, and can easily form a film under room temperature. By using characteristic of an aziridine curing agent capable of performing a cross-linki