Antioxidants comprising reaction products of liquid rubbers and phenols and compositions containing same

Claim 1

AN ANTIOXIDANT FOR RUBBERY AND PLASTIC MATERIALS WHICH BY VIRTUE OF ITS POLYMERIC NATURE IS ESSENTIALLY IMMOBILE WHENINCORPORATED IN A MATRIX THEREOF, SAID ANTIOXIDANT BEING THE REACTION PRODUCT OF REACTANTS CONSISTING OF: (A) A DIENE POLYMER SELECTED FROM THE CLASS CONSISTING OF: (1) HOMOPOLYMERS OF CONJUGATED DIENE HYDROCARBONS HAVING FROM 4 TO 8 CARBON ATOMS, AND (2) COPOLYMERS OF MORE THAN 50% BY WEIGHT OF A CONJUGATED DIENE HYDROCARBON HAVING FROM 4 TO 8 CARBON ATOMS WITH A LESSER AMOUNT OF A COPOLYMERIZABLE COMPOUND CONTAINING THE CH2=C< GROUP, SAID HOMOPOLYMERS (1) AND COPOLYMERS (2) BEING CHARACTERIZED BY: (I) HAVING A MOLECULAR WEIGHT IN THE RANGE OF 500 TO 15,000 AND (II) HAVING LESS THAN 50% OF THE DIENE HYDROCARBON UNITS THEREIN PRESENT IN THE 1,4-CONFIGURATION, AND (B) A PHENOLIC COMPOUND OF THE STRUCTURE R-(OH)N WHEREIN R IS AN AROMATIC HYDROCARBON RADICAL OF 6 TO 15 CARBON ATOMS HAVING EACH CONNECTING VALENCE ON A NUCLEAR CARBON ATOM, N IS AN INTEGER FROM 1 TO 2 INCLUSIVE, SAID REACTION PRODUCT CONTAINING FROM 10 TO 50 PARTS BY WEIGHT OF (B) CHEMICALLY COMBINED WITH 100 PARTS BY WEIGHT OF (A).