EMULSION POLYMERIZATION OF VINYL CHLORIDE USING PREHOMOGENIZED MIXED EMULSIFIER SYSTEM

摘要

Abstract of the DisclosureA one-step process for the emulsion polymerization ofvinyl chloride using a water-soluble initiator and a prehomog-enized aqueous emulsifier system of (1) a C12-C18 straight chainalkyl or alkenyl surfactant and (2) a C16-C20 straight chainalkyl or alkenyl alcohol and/or a straight chain saturated hy-drocarbon having a carbon content of greater than 18 is dis-closed. Suitable examples of straight chain surfactants includesodium lauryl sulfate and sodium oleate. Suitable alcohols in-clude stearyl alcohol, cetyl alcohol and eicosanol. A suitablehydrocarbon is eicosane. The resulting homo- and copolymerlatices have excellent mechanical stabilities, particle sizesgenerally larger than obtainable using only the mixed surfac-tant system without prehomogenization of the emulsifier systemand good thermal stability.