Conventional emulsion polymerization catalysts can be employed in the foregoing polymerization and common examples thereof include peroxides, persulfates, azo compounds and the like such as sodium persulfate, potassium persulfate, ammonium persulfate, hydrogen peroxide, t-butyl hydroperoxide, cumene hydroperoxide, azodiisobutyric diamide as well as catalysts (e.g., redox catalysts) which are activ