C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 141/10 (2006.01) C10M 133/04 (2006.01) C10M 135/18 (2006.01) C10M 163/00 (2006.01)
Patent
CA 2171299
A lubricant composition e.g. for engine oils comprises (i) a base oil, (ii) an antiwear additive combination comprising (a) an organo- molybdenum compound and (b) an ashless organo-phosphorus compound, and (iii) an antioxidant additive combination comprising (d) an aminic antioxidant and (e) a phenolic antioxidant, the weight ratio of aminic antioxidant to phenolic antioxidant being greater than 1:1, preferably from 1.5:1 to 20:1. The antiwear additive combination (ii) may further comprise (c) a zinc thiophosphate compound selected from zinc dialkylditihiophosphate, zinc diaryldithiophosphate and zinc alkylaryldithiophosphate and zinc arylalkylditihiophosphate and mixtures thereof.
Une composition lubrifiante, par exemple pour des huiles à moteurs, comprend (i) une huile de base, (ii) une combinaison d'additifs anti-usure comprenant (a) un composé organo-molybdique et (b) un composé organo-phosphoré sans cendres, et (iii) une combinaison d'additifs anti-oxydants comprenant (d) un anti-oxydant aminé et (e) un anti-oxydant phénolique, le rapport pondéral de l'anti-oxydant aminé sur l'anti-oxydant phénolique étant supérieur à 1:1 et, de préférence de 1,5:1 à 20:1. La combinaison d'additifs anti-usure (ii) peut en outre comprendre (c) un thiophosphate de zinc choisi parmi le dialkyldithiophosphate de zinc, le diaryldithiophosphate de zinc, l'alkylaryldithiophosphate de zinc et l'arylalkyldithiophosphate de zinc, ainsi que leurs mélanges.
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
LandOfFree
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