Dual-curing UV piano black coating and preparation method thereof

The invention relates to the field of coatings, in particular to a dual-curing UV piano black coating and a preparation method thereof, which are used for solving the problem that the existing UV piano black coating is poor in scratch resistance and wear resistance. The preparation method comprises the following steps: in the process of preparing the dual-curing UV piano black coating, firstly preparing a composite reinforcing filler, firstly modifying dry silicon nitride by using a silane coupling agent KH-560, then modifying graphene oxide by using citric acid, and then compounding the modified silicon nitride and the modified graphene to obtain the dual-curing UV piano black coating. The epoxy group on the modified silicon nitride can react with the hydroxyl group on the modified graphene, the modified silicon nitride and the modified graphene are connected in a chemical bond mode, and the silicon nitride and the graphene both have good hardness and mechanical properties, can show a promoting effect under