Method for preparing white latex by utilizing polystyrene waste

The invention relates to the field of recycling of polystyrene waste, in particular to a method for preparing white latex by utilizing the polystyrene waste. In order to overcome the defects in the prior art for preparing polystyrene/polyvinyl acetate core-shell emulsion, the invention provides the method for preparing the white latex from the polystyrene waste, which can overcome the defects of rigidity and easy oxidability of polystyrene chains and ensure that the polyvinyl acetate emulsion prepared after the polystyrene waste is added has stability. The compositions for preparing the white latex by utilizing the polystyrene waste comprise deionized water, the polystyrene waste, polyvinyl alcohol, vinylacetate, acrylic ester, an initiator, an emulsifier, a plasticizer and an antioxygen. The method for preparing the white latex by utilizing the polystyrene waste comprises the following steps: (1) preparing solution of vinylacetate; (2) preparing solution of polyvinyl alcohol; (3) preparing solution of initiator; and (4) performing emulsion polymerization.