FIELD: chemistry.
SUBSTANCE: present invention relates to a lubricant composition comprising a base amount of a base oil and an improved antioxidant composition in an amount of from 0.5 to 1.0 % by weight based on the total weight of the lubricant composition, where the antioxidant composition includes: (a) methylenebis(di-n-butyldithiocarbamate) and (b) a 1,2,4-triazole derivative based on alkylated diphenylamine selected from one of the compounds (i) 1-[di-(4octylphenyl)aminomethyl]triazole, where the mass percentage (a):(b) is from more than 1:1 to 20:1, and (ii) 1-[di-(4-mixed butyl/octylphenyl)aminomethyl]triazole, where the mass percentage (a):(b) ranges from more than 5.7:1 to 9:1.
EFFECT: proposed improved antioxidant compositions.
1 cl, 3 dwg, 6 tbl, 12 ex
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