Preparation method of modified antimony sulfide

The invention discloses a preparation method of modified antimony sulfide. The preparation method comprises the following steps: smashing antimony sulfide, sieving, collecting antimony sulfide powderof which the particle diameter is 0.2 to 5 mu m, adding the antimony sulfide powder into water, and stirring while adding, thus obtaining antimony sulfide size of which the mass percentage is 15 to 55percent; putting the antimony sulfide size and a modifier into a high-speed shearing machine, and stirring and reacting for 70 to 180 minutes at a high speed; filtering after completing reaction, anddrying filter residue, thus obtaining the modified antimony sulfide. According to the preparation method disclosed by the invention, surface coating modification is carried out on micron-scaled antimony sulfide by utilizing surfactants such as hexadecyl trimethyl ammonium bromide, so that the antimony sulfide has very good lipophilicity; a coating material prepared by using the modified antimonysulfide prepared by the meth