Method of coagulating and isolating graft copolymers from latices

摘要

Graft copolymer particles comprising an elastomeric base polymer such as polybutadiene and grafted chains of a thermoplastic, non-elastomeric polymer such as styrene-acrylonitrile are coagulated for isolation from aqueous emulsion by subjecting the emulsion to mechanical shear in the absence of chemical coagulants at a temperature greater than or equal to the glass transition temperature of the thermoplastic, non-elastomeric portion of the copolymer.