The invention discloses a thermo-sensitive discoloration material microcapsule and a preparation method thereof. The microcapsule is composed of a core material and a
wall material for covering the core material, wherein the core material comprises a thermo-sensitive discoloration compound composed of a
chromogenic reagent, a color-developing agent and a
solvent; the
wall material is a
melamine resin pre-
polymer; the
mass ratio of the thermo-sensitive discoloration compound to the
melamine resin pre-
polymer is 1:(1-2). The preparation method comprises the following steps of: mixing the
chromogenic reagent, the color-developing agent and the
solvent to form a thermo-sensitive discoloration solution under the heating condition; adding an emulsifying agent solution into the thermo-sensitive discoloration solution and emulsifying a commixed solution to obtain an
emulsion; adjusting the pH value to 3-6 and adding the
melamine resin pre-
polymer into the
emulsion; reacting at a temperature for 60-70 DEG C for 1-1.5 hours and then cooling to 30-40 DEG C; then adding a dispersant; and washing and
drying to obtain the thermo-sensitive discoloration microcapsule. According to the method provided by the invention, the influences on human bodies and environments are greatly reduced; the operation is simple, the prepared microcapsule products can fast
change color and fade and the effect is obvious, so that the thermo-sensitive discoloration material microcapsule can be widely applied in the fields of anti-counterfeiting
textile and printing and the like.