Thermosensitive color developing coating with stable color generation and preparation method thereof

The invention discloses a thermosensitive color developing coating with stable color generation, which comprises a coating bottom layer and a thermosensitive coating layer, and the thermosensitive coating layer is prepared from the following raw materials in parts by weight: 20-45 parts of a color developing agent, 10-30 parts of a filler I, 1-5 parts of a sensitizer, 5-15 parts of a dispersant I, 70-80 parts of a color former and 100-500 parts of a solvent. According to the invention, the combination of dodecanol and hexadecanol is used as the solvent, so that the sensitivity of temperature-sensitive discoloration can be improved, the color of the color-developing coating can be rapidly changed after reaching a proper temperature, the discoloration sensitivity is high, and the color is clear. And the polyvinyl alcohol with the molecular weight of 1000-3000Da is adopted, so that the surface properties of the color former, the color developing agent and the sensitizer during grinding can be protected, and the