Lubricant compositions containing antioxidants, amine phosphates and 4- (5-) methyl-1-[di-(2-ethylhexyl) aminomethyl]-benzotriazole
AssigneeCiba-Geigy Corporation
InventorsArthur Brady, Ulrich Kristen, Hermann F. Angerer, Franz Regenass
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Abstract
Lubricant formulations containing a combination, which has a synergistic action in respect of metal deactivation, composed of 1-[di-(2-ethylhexyl)-aminomethyl]-benztriazole which is methylated in the benzene ring in the 4-position and/or 5-position, and an antioxidant selected from a small group of antioxidants. Further additives can be added to these lubricant formulations. The compositions mentioned above reduce the abrasion phenomena in the components to be lubricated if they are added to mineral and synthetic lubricating oils, hydraulic fluids and lubricating greases.
Claims7
A stabilizer system which contains
- (a) 1-[di-(2-ethylhexyl)-aminomethyl[-benztriazole which is substituted by methyl in the 4-position and/or 5-position in the benzene ring, and
- (b) at least one antioxidant selected from the group consisting of pentaerythrityl tetrakis-[3-(3,5-di-tert.-butyl-4-hydroxyphenyl)-propionate], isooctyl 3,5-di-tert.-butyl-4-hydroxybenzylmercaptoacetate, o-tert.-butylphenol, 2,6-di-tert.-butyl-4-methylphenol, 4,4'-methylenebis-(2,6-di-tert.-butylphenol), tert.-octylated N-phenyl-1-naphthylamine, and a mixture of monoalkylated and dialkylated tert.-butyldiphenyl-amines/tert.-octyldiphenylamines, where the weight ratio between component (a) and component (b) is 1:2 to 1:10.
Dependencies are inferred from the claim text.