| abstract |
The invention relates to compositions containing A) a lubricant, for example an industrial oil or a lubricating oil for internal combustion engines and for example B1) a mixture of diphenylamine compounds containing 1 to 5 parts by mass in% a) diphenylamine 8 to 18 parts by weight in% b) 4-tert Butyldiphenylamine 21 to 31 parts by weight in% c) one or more of the compounds i) 4-tert-Ocetyldiphenylamin ii) 4,4`-di-tert-butyldiphenylamine iii) 2,4,4`-tris-tert-butyldiphenylamine 20 to 31 Mass fractions in% d) of one or more of the compounds i) 4-tert-butyl-4'-tert-octyldiphenylamine ii) 2,2'- or 2,4'-di-tert-octyldiphenylamine iii) 2,4-dibutylamine tert-butyl-4'-tert-octyldiphenylamine and 15 to 29 parts by weight in% e) of the compound i) 4,4'-di-tert-octyldiphenylamine or of the compounds i) 4,4'-di-tert-octyldiphenylamine and ii ) 2,4-di-tert-octyl-4'-tert-butyldiphenylamine, and C) at least one compound of the general formula I (formula) where R exp 1 and R ind 2 are identical h or are different and are Cmin 3minus to Cind 9-alkyl, C ind 5-C 10-cycloalkyl or Pinan-10-yl and QS-, -S-CH ind 2-S- or -S-CH ind 2-CH ind 2-S-, and components B) and C) are present in a mutual weight ratio of B) to C) of 1 to 0.6 to 1 to 6. Such compositions have good stability against oxidative degradation. Industrial oil; Lubricating oil; Diphenylamine compounds} |