Stabilized activators and their use in emulsion polymerization

Claim 1

A PROCESS FOR POLYMERIZING AN ORGANIC MONOMERIC MATERIAL COMPRISING AN UNSATURATED ORGANIC COMPOUND CONTAINING A CH2=C< GROUP WHILE DISPERSED IN AN AQUEOUS MEDIUM, WHICH COMPRISES POLYMERIZING SUCH A MONOMERIC MATERIAL WHILE DISPERSED IN AN AQUEOUS MEDIUM IN THE PRESENCE OF AN OXIDANT AND IN THE PRESENCE OF AN ACTIVATOR COMPOSITION PREPARED BY DISSOLVING IN WATER A SALT OF A MULTIVALENT METAL CAPABLE OF EXISTING IN TWO VALENCE STATES UNDER SUCH CONDITIONS THAT IT IS PRESENT AT LEAST IN PART IN A LOWER VALENCE STATE TOGETHER WITH A PYROPHOSPHATE OF A MONOVALENT CATION SELECTED FROM THE CLASS CONSISTING OF ALKALI METALS AND AMMONIUM AND WITH A REDUCING SALT OF A MONOVALENT CATION SELECTED FROM THE CLASS CONSISTING OF ALKALI METALS AND AMMONIUM AND OF AN INORGANIC ANION SELECTED FROM THE CLASS CONSISTING OF HYPOPHOSPHITE, THIOSULFATE, SULFITE, BISULFITE AND HYPOSULFITE, HEATING SAID SOLUTION TO 40 TO 100* C. FOR 5 TO 90 MINUTES AND SUBSEQUENTLY COOLING SAID SOLUTION, AND ADDING THE COOL SOLUTION TO SAID AQUEOUS DISPERSION, THE AMOUNT OF SAID SOLUTION ADDED AND THE AMOUNT OF SAID CONSTITUENTS PRESENT IN SAID DISPERSION BEING SUCH THAT, PER 100 PARTS BY WEIGHT OF SAID MONOMERIC MATERIAL, THERE IS ADDED 0.01 TO 1 MILLIMOL PART OF EACH OF SAID MULTIVALENT METAL AND PYROPHOSPHATE AND 0.02 TO 1 PART OF SAID REDUCING SALT, AND SAID OXIDANT IS PRESENT IN AN AMOUNT IN EXCESS OF ONE MOLECULAR EQUIVALENT OF SAID MULTIVALENT METAL.