A kind of unsaturated polyester resin and the preparation method and application thereof without styrene

The present invention provides a kind of unsaturated polyester resin and the preparation method and application thereof without styrene.The preparation method includes under an inert atmosphere, acrylate monomers, polymerization inhibitor and catalyst being uniformly mixed, mixture is obtained；Isocyanate-monomer is added into the mixture again so that acrylate monomers react with isocyanate-monomer, reacting when until being free of isocyano in system terminates, and obtains polyenoid propyl urethane type addition product；Unsaturated polyester (UP), the polyenoid propyl urethane type addition product and acrylic cross-linking monomer without styrene are uniformly mixed, unsaturated polyester (UP)/cross-linking component system is obtained；Initiator is added into the system again, after mixing, gained mixture is solidified, obtains the unsaturated polyester resin for being free of styrene.Compared with using the unsaturated polyester resin of Styrene solidification, unsaturated polyester resin of the invention has comparable processing performance and mechanical property therewith, and has superior impact property.