Emulsion polymerization with a catalyst comprising a diazo thioether and a ferricyanide

Claim 1

IN A PROCESS FOR PRODUCING A SOLID PLASTIC ORGANIC POLYMER BY POLYMERIZING IN AQUEOUS EMULSION AN UNSATURATED ORGANIC MONOMERIC MATERIAL CONTAINING AN ACTIVE CH2=C< GROUP AND POLYMERIZABLE WHEN DISPERSED IN AQUEOUS EMULSION, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID POLYMERIZATION AT A POLYMERIZATION TEMPERATURE BETWEEN 0* C. AND -30* C. IN THE PRESSENCE OF A COMPOSITION COMPRISING 0.05 TO 2 PARTS OF A DIAZO THIOETHER HAVING THE FORMULA R-N"=N-S-R'' WHERE R IS A MEMBER OF THE CLASS CONSISTING OF AROMATIC RADICALS AND R'' IS A MEMBER OF THE CLASS CONSISTING OF AROMATIC CYCLOALKYL AND ALIPHATIC RADICALS, 0.03 TO 1 PART OF A WATERSOLUBLE FERRICYANIDE CONTAINING A MONOVALENT CATION 0.05 TO 1.4 PARTS OF AN ALKYL MERCAPTAN HAVING FOUR TO TWENTY INCLUSIVE CARBON ATOMS PER MOLECULE, AND 30 TO 120 PARTS OF A SATURATED ALCOHOL SELECTED FROM THE CLASS CONSISTING OF METHANOL, ETHYLENE GLYCOL, GLYCERINE AND ERYTHRITOL, ALL BEING PARTS BY WEIGHT PER 100 PARTS OF SAID MONOMERIC MATERIAL, WITH THE RATIO OF AQUEOUS MEDIUM INCLUDING SAID ALCOHOL TO MONOMERIC MATERIAL BEING BETWEEN 1.5:1 AND 2.75:1 BY WEIGHT.