Steric hindrance type secondary amine compound, preparation method and polyurea resin

The invention relates to synthesis of compounds, in particular to a steric hindrance type secondary amine compound, a preparation method and polyurea resin. The compound is prepared from the following raw materials: a dimeric beta-dicarbonyl compound and primary amine. The invention provides a steric hindrance type secondary amine compound. By controlling R'directly connected with secondary amine to adopt substituent groups with large steric hindrance such as branched alkane or cyclic alkane and controlling the number of carbon atoms of R1 on adjacent carbon atoms, synthesis of the compound can be promoted, the yield can be improved, the curing time of polyisocyanate can be effectively improved, and meanwhile, good comprehensive performance such as glossy and smooth surface, low viscosity and the like can be brought. Therefore, various application requirements are met. Moreover, the inventor finds that by connecting a beta-ester group structure to a secondary amine group in the compound, when the compound act