Stabilized redox compositions

Claim 1

IN THE PRODUCTION OF SYNTHETIC RUBBER BY THE POLYMERIZATION IN AN AQUEOUS EMULSION OF A MONOMERIC MATERIAL COMPRISING A MAJOR AMOUNT OF A POLYMERIZABLE 1,3-DIOLEFIN AND A MINOR AMOUNT OF AN UNSATURATED ORGANIC COMPOUND COPOLYMERIZABLE THEREWITH IN AQUEOUS EMULSION, SAID POLYMERIZATION BEING CONDUCTED IN THE PRESENCE OF A REDOX COMPOSITION COMPRISING AN OXIDANT, A REDUCTANT, AND AN IRON PYROPHOSPHATE CATALYST THEREFOR, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS SAID OXIDANT A PEROXIDE MATERIAL AND AS SAID REDUCTANT AND IRON PYROPHOSPHATE AN AQUEOUS SOLUTION PREPARED BY DISSOLVING IN WATER SODIUM PYROPHOSPHATE, A SOLUBLE FERRIC PYROPHOSPHATE, AND A REDUCING SUGAR, HEATING SAID SOLUTION TO ITS BOILING POINT AT ATMOSPHERIC PRESSURE AND BOILING SAME FOR A PERIOD OF ABOUT 5 TO ABOUT 60 MINUTES, AND SUBSEQUENTLY INCORPORATING THE RESULTING SOLUTION IN SAID POLYMERIZATION IN AN AMOUNT THAT, PER 100 PARTS OF MONOMERIC MATERIAL, THE ADDED SOLUTION CONTAINS ABOUT 0.1 TO ABOUT 0.35 PARTS OF FERRIC PYROPHOSPHATE, ABOUT 0.5 TO ABOUT 3 PARTS OF SODIUM PYROPHOSPHATE, AND ABOUT 1 TO ABOUT 4 PARTS OF SAID REDUCING SUGAR.