Production of elastomer particles with broad size distribution by emulsion polymerization of ethylenically unsaturated monomers, comprises emulsifier with high critical micelle concentration

摘要

Production of elastomer particles by emulsion polymerization of ethylenically unsaturated monomers, comprises using an emulsifier with a critical micelle concentration (cmc) of at least 10-3 mole/liter. Production of elastomer particles comprises: (a) emulsifying ethylenically unsaturated monomers, the homo- or copolymers of which have a glass transition temperature (Tg) below 0 deg C, in water under shearing action in the presence of an emulsifier with a cmc of at least 10-3 mole/liter and a water-soluble initiator; and (b) heating the emulsion to initiate polymerization, optionally with addition of further monomers for grafting.