Emulsion polymerization in the presence of a dioxane

Claim 2

AN IMPROVED PROCESS FOR PRODUCING A SYNTHETIC RUBBER FROM 1,3-BUTADIENE AND STYRENE AND HAVING A HIGH TENSILE STRENGTH AND A LOW HYSTERESIS, WHICH COMPRISES COPOLYMERIZING A MONOMERIC MATERIAL, COMPRISING A MAJOR AMOUNT OF 1,3-BUTADIENE AND A MINOR AMOUNT OF STYRENE, AT A TEMPERATURE BETWEEN -10 AND 50* C. AND IN THE PRESENCE OF A CATALYSY COMPOSITION COMPRISING 0.2 PART PHENYL (DIMETHYL) HYDROPEROXYMETHANE, 1.0 PART SODIUM PYROPHOSPHATE DECAHYDRATE, 0.1 PART FERROUS SULFATE HEPTAHYDRATE, AND 1.0 PART LEVULOSE, TOGETHER WITH 0.4 PART TERTIARY ALKYL MERCAPTAN HAVING TWELVE TO SIXTEEN CARBON ATOMS PER MOLECULE, SAID PARTS BEING PARTS BY WEIGHT PER 100 PARTS OF SAID MONOMERIC MATERIAL, WHILE EMULSIFIED WITH AN AQUEOUS MEDIUM COMPRISING WATER AND 45 PER CENT 1,4-DIOXANE WITH A WEIGHT RATIO OF SAID AQUEOUS MEDIUM TO SAID MONOMERIC MATERIAL BETWEEN 1.5:1 AND 275:1 AND IN THE PRESENCE OF A ROSIN SOAP EMULSIFYING AGENT, AND RECOVERING A RESULTING SYNTHETIC RUBBER POLYME HAVING A HIGH TENSILE STRENGTH AND A LOW HYSTERESIS.

Claim 3

IN A PROCESS FOR THE POLYMERIZATION OF A MONOMERIC MATERIAL COMPRISING AT LEAST A MAJOR PORTION OF A 1,3-DIOLEFIN WHILE DISPERSED IN AN AQUEOUS MEDIUM TO PRODUCE A SYNTHETIC RUBBER HAVING A HIGH TENSILE STRENGTH AND A LOW HYSTERESIS, THE IMPROVEMENT WHICH COMPRISES POLYMERIZING SAID MONOMERIC MATERIAL AT A TEMPERATURE BETWEEN -30 AND 50* C. IN THE PRESENCE OF A CATALYST COMPOSITION COMPRISING CATALYTIC AMOUNTS OF PHENYL (DIMETHYL) HYDROPEROXYMETHANE, A WATER-SOLUBLE PYROPHOSPHATE, A WATER-SOLUBLE FERROUS SALT, AND A REDUCING SUGAR, TOGETHER WITH 0.05 TO 1.4 PARTS BY WEIGHT OF ALKYL MERCAPTAN HAVING TWELVE TO SIXTEEN CARBON ATOMS PER MOLECULE, PER ONE HUNDRED PARTS BY WEIGHT OF SAID MONOMERIC MATERIAL, WHILE EMULSIFIED WITH AN AQUEOUS MEDIUM COMPRISING WATER AND 45 PER CENT 1,4-DIOXANE WITH A WEIGHT RATIO OF SAID AQUEOUS MEDIUM TO SAID MONOMERIC MATERIAL BETWEEN 1.5:1 AND 2.75:1 AND IN THE PRESENCE OF A ROSIN SOAP EMULSIFYING AGENT, AND RECOVERING A RESULTING SYNTHETIC RUBBER POLYMER HAVING A HIGH TENSILE STRENGTH AND A LOW HYSTERESIS.

Claim 4

IN A PROCESS FOR THE POLYMERIZATION OF A MONOMERIC MATERIAL COMPRISING AT LEAST A MAJOR PORTION OF A 1,3-DIOLEFIN WHILE DISPERSED IN AN AQUEOUS MEDIUM TO PRODUCE A SYNTHETIC RUBBER HAVING A HIGH TENSILE STRENGTH AND A LOW HYSTERESIS, THE IMPROVEMENT WHICH COMPRISES POLYMERIZING SAID MONOMERIC MATERIAL AT A TEMPERATURE BETWEEN -30 AND 50* C. IN THE PRESENCE OF A CATALYST COMPOSITION COMPRISING CATALYTIC AMOUNTS OF PHENYL (DIMETHYL) HYDROPEROXYMETHANE, A WATER-SOLUBLE PYROPHOSPHATE, A WATER-SOLUBLE FERROUS SALT, AND A REDUCING SUGAR, TOGETHER WITH 0.05 TO 1.4 PARTS BY WEIGHT OF ALKYL MERCAPTAN HAVING TWELVE TO SIXTEEN CARBON ATOMS PER MOLECULE, PER ONE HUNDRED PARTS BY WEIGHT OF SAID MONOMERIC MATERIAL, WHILE EMULSIFIED WITH AN AQUEOUS MEDIUM COMPRISING WATER AND 45 PER CENT 1,4-DIOXANE WITH A WEIGHT RATIO OF SAID AQUEOUS MEDIUM TO SAID MONOMERIC MATERIAL BETWEEN 1.5:1 AND 2.75:1 AND IN THE PRESENCE OF A ROSIN SOAP EMULSIFYING AGENT, AND RECOVERING A RESULTING SYNTHETIC RUBBER POLYMER HAVING A HIGH TENSILE STRENGTH AND A LOW HYSTERESIS.