| abstract |
DERIVATIVES OF DIPHENYLAMINE OR PHENYLNAPHTHYLAMINE OF THE TYPES 1-(R4-C(-R5)(-R6)-),4-(R1-C(-R2)(-R3)-(1,4-PHENYLENE)- NH-)BENZENE, R1-C(-R2)(-R3)-(3-Y-1,4-PHENYLENE)-NH-(2-X- 1,4-PHENYLENE)-C(-R4)(-R5)-R6, 1-((4-R8,2-X-PHENYL)-NH-), 2-Y,4-(R1-C(-R2)(-R3)-)BENZENE, 1-((4-(R9-C(-R10)(-R11)-) -PHENYL)-NH-)NAPHTHALENE, AND 1-R15,2-((4-(R12-C(-R13) (-R14)-)PHENYL)-NH-)NAPHTHALENE WHERE R1,R9 AND R12 ARE PHENYL OR P-TOLYL GROUPS AND THE REMAINING R''S X AND Y MAY BE ALKYL OR VARIOUS OTHER SUBSTITUENTS, ARE USEFUL ANTIOXIDANTS FOR LUBRICATING OILS OR FOR VARIOUS POLYMERIC SUBSTRATES (E.G. POLYPROPYLENE) ESPECIALLY IN COMBINATION WITH A DIALKYL THIODIPROPIONATE. A TYPICAL ANTIOXDANT IS 4,4''BIS(ALPHA,ALPHA,P-TRIMETHYLBENZYLIDIPHENYLAMINE MADE BY REACTING P-ALPHA-DIMETHYLSTRYENE WITH DIPHENYLAMINE. |