PURPOSE: To produce an aqueous emulsion in which the rate of chemical bonding (grafting) of a mercapto PVA to the dispersoid is high stably on a practical industrial scale.
CONSTITUTION: A process for emulsion-polymerizing at least one monomer selected from the group consisting of ethylenically unsaturated and diene monomers in the presence of dispersant comprising a mercapto polyvinyl alcohol polymer, which comprises using an initiator incapable of self-generation of free radicals at the polymerization temperature and capable of generation of free radicals only by the redox reaction with the mercapto groups of the mercapto polyvinyl alcohol polymer and continuously or intermittently adding this polymer to the emulsion polymerization system during the polymerization.
SATO TOSHIAKI
YUKI TAKESHI
