Nitrogen-bearing additives having antioxidant properties, and lubricant compositions comprising same.

摘要

Preparation of antioxidant additives to lubricants and their use in lubricating compositions. The additives according to the invention contain the functional group: ArAr'(H)N-(R-X)a-R'Y where Ar and Ar' are identical or different aromatic radicals, R and R', which are identical or different, denote a linear or branched C2-C18 alkylene radical, X denotes an oxygen or sulphur atom or an -NH group, a is an integer between 0 and 5 and Y is chosen from the group made up of -NR1R2, where R1 and R2, which are identical or different, denote a hydrogen atom or a C1-C12 alkyl, alkenyl, cycloalkyl or arylalkyl radical -N=CH-Ar1 where Ar1 is an aryl radical containing at least one phenolic group -NR1-CO-Ar1 and <IMAGE> where R3 denotes a saturated or unsaturated, linear or branched alkyl radical.