| abstract |
The present invention relates to an antioxidant composition for lubricating oils and organic polymers comprising a first antioxidant comprising a reaction product of p-cresol, dicyclopentadiene and isobutylene and a second antioxidant comprising a diarylamine . The first antioxidant preferably has the following structure: Wherein n is from 0 to 50, R < 1 > And R 2 is independently hydrogen, optionally substituted straight or branched C 1 to C 30 alkyl or alkylene group with one or more substituents, C 3 to C 12 cycloalkyl, C 5 to C 12 aryl, or C 6 to C 12 alkyl aryl. The second antioxidant preferably has the formula: (R 3 ) a -Ar 1 -NH-Ar 2 - (R 4 ) b R 3 and R 4 are independently hydrogen or a hydrocarbyl group having from 6 to about 100 carbon atoms, a and b are independently 0 to 3 carbon atoms, and Ar 1 and Ar 2 are independently an aromatic hydrocarbon group, Or (a + b) is not greater than 4. |