▎ 摘　　要

NOVELTY - Self-repairing micro-capsule, comprises a capsule wall and a capsule core, the load strength of the capsule wall is 10-70 mN, the capsule core has fluidity, and can generate polymerization under the condition of high temperature more than 100℃. USE - The self-repairing micro-capsule is useful in coating. ADVANTAGE - The self-repairing micro-capsule: realizes the rapid repair of the coating crack; and can make up the coating crack width in large range. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing self-repairing micro-capsule, comprising (1) mixing the water, emulsifying agent and optionally, surfactant emulsion A, (2) mixing styrene, divinylbenzene, benzenediol, isocyanate graphene and/or mixing derivative to obtain mixed solution B, (3) mixing the emulsion A, mixed solution B and urea-formaldehyde resin under the interface reaction condition , adding pH regulator to make the pH of the mixed solution is 3.5-7, where the weight average molecular weight of the urea-formaldehyde resin is 100-1000 g/mol.