Process for promoting the low-hysteresis processing of rubber and carbon black using an aromatic triazene

Claim 1

A PROCESS WHICH COMPRISES MIXING RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, SYNTHETIC RUBBERY HOMOPOLYMERS OF ALIPHATIC CONJUGATED DIOLEFIN HYDROCARBONS AND SYNTHETIC RUBBERY COPOLYMERS OF SUCH DIOEFIN HYDROCARBONS WITH COPOLYMERIZABLE MONOOLEFINIC COMPOUNDS WHICH COPOLYMERS CONTAIN AT LEAST 25% OF COMBINED DIOLEFIN HYDROCARBON, WITH A RELATIVELY LARGE AMOUNT OF RUBBER-REINFORCING CARBON BLACK, AND FROM 0.5 TO 4 PARTS, PER 100 PARTS OF SAID RUBBER, OF AN AROMATIC TRIAZENE IN WHICH ONE HYDROGEN OF THE HYPOTHETICAL PARENT TRIAZENE HAS BEEN REPLACED BY AN ARYL GROUP AND AT LEAST ONE OTHER HYDROGEN HAS BEEN REPLACED BY A GROUP SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARALKYL, ARYL, ACYL, AMINO, HYDROXYL, CYANOGUANYL, ARYLSULFONYL, CARBAMYL, THIOCARBAMYL, PHENYLDIAZO, AND PHENYLCARBAMYL, HEATING THE MIXTURE AT A TEMPERATURE OF AT LEAST 250*F. BUT BELOW THAT AT WHICH THE RUBBER WOULD BE HARMED, MASTICATING THE MIXTURE AND COMPLETING INCORPORATION OF VULCANIZING AND OTHER DESIRED INGREDIENTS, SHAPING THE MASS, AND VULCANIZING THE RESULTING SHAPED MASS.