C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 141/00 (2006.01) C10M 135/18 (2006.01) C10M 137/14 (2006.01) C10M 139/00 (2006.01) C10M 141/10 (2006.01) C10M 163/00 (2006.01)
Patent
CA 2171538
A lubricant composition is described, particularly for engine oils, comprising a base oil of viscosity from 3 to 26 cSt (mm2/s) at 100°C and an antiwear additive combination comprising (a) an oil soluble or oil dispersible phosphorus-free organo-molybdenum compound, (b) an ashless, sulphur-containing organo-phosphorus compound and optionally (c) a zinc thiophosphate compound selected from one or more of zinc dialkyldithiophosphate, zinc diaryldithiophosphate zinc alkylaryldithiophosphate and zinc arylalkyldithiophosphate. The molybdenum compound may be a carbamate, e.g. molybdenum dithiocarbamate (MoDTC) but is preferably nitrogen-free, e.g. a carboxylate.
On décrit une composition lubrifiante, en particulier pour les huiles à moteurs, comprenant une huile de base ayant une viscosité de 3 - 26 cSt (mm<2>/s) à 100 DEG C et une combinaison d'additifs anti-usure comprenant (a) un composé organo-molybdique exempt de phosphore, dispersible ou soluble dans l'huile, (b) un composé organo-phosphoré sans cendres contenant du soufre et éventuellement (c) un ou plusieurs thiophosphates de zinc choisis parmi le dialkyldithiophosphate de zinc, le diaryldithiophosphate de zinc, les alkylaryldithiophosphate de zinc et l'arylalkyldithiophosphate de zinc. Le composé molybdique peut être un carbamate, par exemple un dithiocarbamate de molybdène (MoDTC), mais il est de préférence exempt d'azote, et peut être, par exemple, un carboxylate.
Atherton John Ian
Holt David Gary Lawton
Vernon Patrick Desmond Fraser
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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