Patent ID: 6242541
Filing Date: 2001-06-05
Classification: C08F

Abstract:
A process for preparing homo- and copolymers of vinyl chloride by batch polymerization in aqueous emulsion in the presence of an emulsifier combination consisting of at least two emulsifiers selected from the group consisting of anionic and nonionic emulsifiers, wherein the emulsifier combination is metered in during the polymerization, which comprises metering in the first phase of the polymerization, at least one emulsifier of the emulsifier combination having at least 10 carbon atoms and selected from the group consisting of alkylarylsulfonates having from 10 to 24 carbon atoms, sulfosuccinates of monohydric alcohols having at least 10 carbon atoms and alkylcarboxylates with a chain length of from 10 to 18 carbon atoms, and not starting to meter in the remaining emulsifiers of the emulsifier combination until a polymerization conversion of at least 10% has been reached.