Polystyrene color master batch and preparation method thereof

The invention relates to a polystyrene color master batch and a preparation method thereof, and the color master batch comprises the following components in parts by weight: 100 parts of polystyrene resin, 12-24 parts of modified PS microspheres, 55-85 parts of a silane modified pigment, 0.5-1.5 parts of a lubricant and 0.1-1 part of a whitening agent. The polystyrene color master batch is prepared by adding the modified PS microspheres, the silane modified pigment, the lubricant and the whitening agent on the basis of the polystyrene resin; wherein the modified PS microspheres can enhance the strength and toughness of the color master batch, and the heat resistance is also well enhanced; the silane modified pigment has better dispersity than common filler, so that the color master batch is more uniform in color development; the lubricant is used for enhancing the ductility of the raw materials, and the whitening agent can make the color master batch pigment more gorgeous. 本发明涉及一种聚苯乙烯色母粒及其制备方法，色母粒按照重量份数计算，包括：