C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 161/00 (2006.01) C10M 101/00 (2006.01) C10M 107/02 (2006.01) C10M 111/04 (2006.01) C10M 127/06 (2006.01) C10M 129/12 (2006.01) C10M 129/14 (2006.01) C10M 129/16 (2006.01) C10M 135/28 (2006.01) C10M 143/08 (2006.01) C10M 169/04 (2006.01)
Patent
CA 2471016
The present invention provides a viscosity index improving lubricant additive which comprises an olefinic oligomer of about 2,000 to about 20,000 number average molecular weight having a viscosity of 75 to about 3,000 cSt at 100 ~C and a hydrocarbyl aromatic which contains at least about 5 % of its weight from aromatic moieties having a viscosity of about 3 to about 50 cSt at 100 ~C where the weight ratio of hydrocarbyl aromatic component to olefin oligomer is from about 1:2 to about 50:1. In another aspect, the invention provides for a lubricating oil composition comprising a base oil and the instant viscosity index improving additive.
L'invention concerne un additif lubrifiant d'amélioration d'indice de viscosité comprenant un oligomère oléfinique d'environ 2 000 à environ 20 000 en poids moléculaire moyen en nombre présentant une viscosité de 75 à environ 3 000 cSt à 100· C et un composé aromatique d'hydrocarbyle contenant au moins 5 % de son poids à partir de fractions aromatiques présentant une viscosité d'environ 3 à 5 cSt à 100· C, le rapport pondéral du composé aromatique d'hydrocarbyle par rapport à l'oligomère d'oléfine est d'environ 1:2 à environ 50:1. Dans un autre aspect, l'invention concerne une composition d'huile de lubrification comprenant une huile de base et l'additif d'amélioration d'indice de viscosité instantané.
Baillargeon David J.
Buck William H.
Deckman Douglas Edward
Maxwell William L.
Winemiller Mark D.
Borden Ladner Gervais Llp
Exxonmobil Research And Engineering Company
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