Cardanol modified radix asparagi resin, preparation method thereof and polyurea coating

The invention relates to the field of resin synthesis, in particular to anacardol modified asparagus resin, a preparation method thereof and a polyurea coating. The preparation raw materials comprise diamine modified cardanol and maleate. The inventor finds that when anacardol is used for modifying asparagus resin and the like, due to a phenyl structure and a long side chain of the anacardol, in the reaction process of primary amine of the anacardol and maleate, the viscosity is large, the primary amine is difficult to react with the maleate, and the high-yield asparagus resin is obtained, but when the diamine modified anacardol provided by the invention is used for modifying the asparagus resin and the like, the viscosity is high. Especially, when diamine modified cardanol containing a cyclic substituent group reacts with maleate in comparison with a chain substituent group, the asparagus resin with higher yield can be obtained. In the reaction process, the reaction temperature and the use amount of maleate