| 摘要 |
The compositions contain 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 % by weight of a) diphenylamine, 8 to 18 % by weight of b) 4-tert-butyldiphenylamine, 21 to 31 % by weight of c) one or more of the compounds i) 4-tert-octyldiphenylamine, ii) 4,4'-di-tert-butyldiphenylamine, iii) 2,4,4'-tris-tert-butyldiphenylamine, 20 to 31 % by weight of d) 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-di-tert-butyl-4'-tert-octyldiphenylamine, and 15 to 29 % by weight of e) 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 <IMAGE> R<1> and R<2> being identical or different and being C3- to C9-alkyl, C5-C10-cycloalkyl or pinan-10-yl and Q being -S-, -S-CH2-S- or -S-CH2-CH2-S-, and the components B) and C) being present in a mutual B)/C) weight ratio of 1:0.6 to 1:6. Compositions of this type show good resistance to oxidation degradation. |
