Quick-curing low-dielectric-property two-component polyurethane as well as preparation method and application thereof

The invention belongs to the field of functional polyurethane synthesis, and particularly relates to quick-curing bi-component polyurethane with a low dielectric constant/low loss tangent value as well as a preparation method and application thereof. The preparation method of the hydroxyl-terminated polyurethane comprises the following step: in the presence of a cross-linking agent, an organic solvent and a catalyst, reacting aliphatic diisocyanate, a metal organic polyhedral nano material (optional) and an oligomer to prepare the hydroxyl-terminated polyurethane. The hydroxyl-terminated polyurethane with a regular structure can be obtained by selecting the aliphatic diisocyanate and the oligomer with symmetrical structures, and a film formed by the hydroxyl-terminated polyurethane and the curing agent has relatively low dielectric constant and loss tangent value. Furthermore, the MOP nano material is introduced, so that the dielectric constant and the loss tangent value of the system can be further reduced,