Abstract: A tannic acid curing agent and a preparation method thereof are provided. The present invention uses tannic acid as a raw material and the long fatty chain of 10-undecenoyl chloride is introduced into the tannic acid structure to obtain the tannic acid curing agent. The preparation method includes the following steps: mixing tannic acid, 10-undecenoyl chloride, a catalyst and a solvent for a substitution reaction to obtain undecylenyl tannic acid, in which the catalyst includes an acid binding agent and 4-diaminopyridine, and the solvent includes ethyl acetate and N,N-dimethylformamide; mixing the undecylenyl tannic acid, a mercapto compound, a solvent and a photoinitiator for an addition reaction under an ultraviolet irradiation to obtain the tannic acid curing agent, in which the mercapto compound is a mercapto carboxylic acid compound or a mercapto alcohol compound.

Abstract: A tannic acid curing agent and a preparation method thereof are provided. The present invention uses tannic acid as a raw material and the long fatty chain of 10-undecenoyl chloride is introduced into the tannic acid structure to obtain the tannic acid curing agent. The preparation method includes the following steps: mixing tannic acid, 10-undecenoyl chloride, a catalyst and a solvent for a substitution reaction to obtain undecylenyl tannic acid, in which the catalyst includes an acid binding agent and 4-diaminopyridine, and the solvent includes ethyl acetate and N, N-dimethylformamide; mixing the undecylenyl tannic acid, a mercapto compound, a solvent and a photoinitiator for an addition reaction under an ultraviolet irradiation to obtain the tannic acid curing agent, in which the mercapto compound is a mercapto carboxylic acid compound or a mercapto alcohol compound.