Preparation method of superfine pigment preparation for polyolefin coloring

The invention provides a preparation method of a superfine pigment preparation for polyolefin coloring, which comprises the following steps: adding a grinding medium into a stirring ball mill with a jacket, stirring at 50r/min, adding hot water, simultaneously adding 30-80 parts of pigment and 70-20 parts of low-density polyethylene wax, grinding at 50r/min for 1 hour, adding 120-560 parts of water, controlling the temperature to be 60-80 DEG C by using the jacket, grinding, completely coating the pigment with resin, and drying to obtain the superfine pigment preparation for polyolefin coloring. Keeping the temperature, and grinding for 3-6 hours; diluting the material with water, filtering, washing a filter cake with cold water until the conductivity is below 200 [mu] s/cm, and drying in a drying oven; and drying and cooling the product, and crushing to obtain the superfine preparation containing the polyethylene wax. The superfine pigment preparation can be quickly dispersed during application, and has a lo