Preparation method of self-temperature-limiting heating coating material

The invention discloses a self-temperature-limiting heating coating material, which comprises the following components in parts by weight: 10-20 parts of graphene, 20-50 parts of a dispersing agent, 10-30 parts of neutral salt, 10-50 parts of resin, 2-4 parts of conductive graphite, 1-3 parts of zinc borate, 1-3 parts of flame-retardant filler, 5-15 parts of self-temperature-limiting PTC filler, 1-3 parts of a plasticizer and 3-5 parts of a defoaming agent. The invention belongs to the technical field of self-temperature-limiting heating coating preparation, and particularly provides a preparation method of a self-temperature-limiting heating coating, which utilizes a regulator higher than the boiling point of water and adds neutral salt to increase the boiling point so as to reduce the heat storage temperature of a heating coating material and ensure that the heat storage temperature of the cured heating coating material is lower than the boiling point of the added boiling point regulator. Therefore, the sel