Rubber antioxidant

Claim 1

THE NEUTRALIZED MONOSULFIDE REACTION PRODUCTS OF (1) ONE MOLE OF A PHENYLENEDIAMINE FROM THE CLASS CONSISTING OF N,N''-DIPHENYL-P-PHENYLENEDIAMINE AND ITS RINGSUBSTITUTED METHYL AND ETHYL DERIVATIVES, (2) SUBSTANTIALLY 1 TO 3 MOLS OF A SUBSTITUTED 1,2-DIHYDROQUINOLINE OF THE CLASS CONSISTING OF 2,2,4-TRIMETHYL-1,2-DIHYDROQUINOLINE, 6-ALKYL-2,2,--TRIMETHYL-1,2-DIHYROQUINOLINE, 6-CYCLO ALKYL-2,2,4-TRIMETHYL-1,2-DIHYDROQUINOLINE AND 6ALKOXY -2,2,4-TRIMETHYL -1,2-DIHYDROQUINOLINE IN WHICH THE ALKYL, CYCLOAKLKYL, AND ALKOXY SUBSTITUENTS CONTAINS UP TOSUBSTANTIALLY 20 CARBON ATOMS AND(3) AN AMOUNT OF SULFUR DICHLORIDE EQUAL TO THE SUM OF 0.5 TO 1 TIMES THE NUMBER OF MOLS OF SAID PHENYLENEDIAMINE AND 0.5 TO 2 TIMES THE NUMBER OF MOLS OF THE DIHYDROQUINOLINE, WHICH REACTION PRODUCT IS OBTAINED BY HEATING A SOLUTION OF THE REACTANTS IN A LIQUID ORGANIC SOLVENT IN WHICH THE REACTANTS ARE SOLUBLE, THE SOLVENT BEING NEUTRAL UNDER THE CONSITIONS OF THE REACTION, AT A TEMPERATURE BETWEEN 30* C. AND THE REFLUXING TEMPERATURE OF THE SOLVENT AND WHICH IS SUBSTANTIALLY FREE OF HYDROGEN CHLORIDE.