Increasing effectiveness of phenolic antioxidants

Claim 1

A SULFUR VULCANIZABLE DIENE HYDROCARBON RUBBER COMPOSITION HAVING INCORPORATED THEREIN A SMALL AMOUNT EACH OF A PHENOLIC ANTIOXIDANT CONTAINING TWO PHENOLIC HYDROXY GROUPS SELECTED FROM THE CLASS CONSISTING OF ALKYLIDENE BIS DIALKYLPHENOLS, THIOBIS DIALKLPHENOLS AND DIALKYLHYDROQUINONE AND A SUBSTITUTED AMMONIA COMPOUND SELECTED FROM THE CLASS CONSISTING OF AMINES AND SALTS THEREOF, THE AMINE BEING SELECTED FROM A CLASS CONSISTING OF SATURATED HETEROCYCLIC AMINES, ETHYLENE POLYAMINES AND MONOAMINES HAVING ATTACHED TO THE NITROGEN AT LEAST ONE NON-AROMATIC ORGANIC RADICAL BUT NOT MORE THAN ONE AROMATIC RADICAL, THE RADICALS LINKED TO NITROGEN BEING SELECTED FROM A GROUP CONSISTING OF HYDROGEN, CYCLOHEXYL, ALKYL, CYANOETHYL, HYDROXYETHYL, ACETONYL, BENZYL, ALKENYL, CHLOROALKENYL, PHENYL, HYDROXYPHENYL, LOWER ALKOXY PHENYL AND LOWER ALKYL PHENYL RADICALS, THE PROPORTION OF PEHENOLIC ANTIOXIDANT BEING WITHIN THE RANGE OF 10-90% AND THE PROPORATION OF SUBSTITUTED AMMONIA COMPOUND BEING WITHIN THE RANGE OF 90-10% OF THE COMBINED WEIGHT AND THE COMBINED WEIGHT BEING WITHIN THE RANGE OF 0.5-5% OF THE RUBBER HYDROCARBON.