Emulsion polymerization of vinyl chloride using prehomogenized mixed emulsifier system

摘要

A one-step process for the emulsion polymerization of vinyl chloride using a water-soluble initiator and a prehomogenized aqueous emulsifier system of (1) a C12-C18 straight chain alkyl or alkenyl surfactant and (2) a C16-C20 straight chain alkyl or alkenyl alcohol and/or a straight chain saturated hydrocarbon having a carbon content of greater than 18 is disclosed. Suitable examples of straight chain surfactants include sodium lauryl sulfate and sodium oleate. Suitable alcohols include stearyl alcohol, cetyl alcohol and eicosanol. A suitable hydrocarbon is eicosane. The resulting homo- and copolymer latices have excellent mechanical stabilities, particle sizes generally larger than obtainable using only the mixed surfactant system without prehomogenization of the emulsifier system and good thermal stability.