Method for preparing a hollow sphere plastic pigments

The present invention provides a method for preparing a hollow sphere plastic pigments, the method is based on free emulsion polymerization, and by controlling the ratio of monomer concentration, a large particle size disposable prepared seed through the seed emulsion polymerization, using bicontinuous dropwise polystyrene seed coating on the outer shell, and then treatment with a base, to prepare micron-sized hollow sphere plastic pigment, to solve the traditional method of making a long period, problems such as particle size is too small.