C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 141/12 (2006.01) C08F 8/00 (2006.01) C10M 133/56 (2006.01) C10M 137/10 (2006.01) C10M 141/10 (2006.01) C10M 163/00 (2006.01)
Patent
CA 2305637
A lubricating oil composition for internal combustion engines is preferably composed of a major portion of a base oil; 0.5 % to 15 % of a cyclic carbonate- treated polyalkylene succinimide additive; 0.5 % to 15 % of a borated polyalkylene succinimide additive; 0.5 % to 20 % of a metal-containing detergent; and 0.1 % to 3 % of a zinc dialkyldithiophosphate, other additives such as a molybdenum compound, an oxidation inhibitor and a viscosity index improver can be added. The molecular weight of the polyalkylenes from which the carbonated polyalkylene succinimide is derived is preferably at least 300 greater than the molecular weight of the polyalkylenes from which the borated polyalkylene succinimide is derived.
L'invention concerne une composition à base d'huile lubrifiante destinée aux moteurs à combustion interne. Elle contient, de préférence, ce qui suit: une grande partie d'huile de base; de 0,5 % à 15 % d'un additif à base de polyalkylène succinimide traité avec un carbonate cyclique; de 0,5 % à 15 % d'un additif à base de polyalkylène succinimide boraté; de 0,5 % à 20 % d'un détergent contenant des métaux; et de 0,1 % à 3 % d'un dialkyldithiophosphate de zinc ainsi que d'autres additifs tels qu'un composé de molybdène, un inhibiteur d'oxydation et un améliorant de l'indice de viscosité. De préférence, le poids moléculaire des polyalkylènes dont on a dérivé le polyalkylène succinimide carbonaté est d'au moins 300 fois plus important que le poids moléculaire des polyalkylènes dont on a dérivé le polyalkylène succinimide boraté.
Freerks Robert L.
Hirano Satoshi
Nakazato Morikuni
Willis William W. Jr.
Chevron Chemical Company Llc
Oronite Japan Limited
Sim & Mcburney
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