High viscosity index wide-temperature functional fluid...

C - Chemistry – Metallurgy – 10 – M

Patent

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Details

C10M 171/02 (2006.01) C10G 65/04 (2006.01) C10M 105/04 (2006.01)

Patent

CA 2508117

This invention relates to lubricants comprising base stocks and base oils that exhibit an unexpected combination of high viscosity index (130 or greater) and a ratio of measured-to-theoretical high-shear/low-temperature viscosity and - 30~C or lower and the methods of making them. Specifically, the present invention relates to novel high viscosity index, low-viscosity lubricants usable as wide-temperature lubricants, for example hyrdraulic oils, comprising novel low-viscosity base stocks, with improved performance in low-temperature viscosity, and methods to produce them.

Cette invention concerne des lubrifiants qui comprennent des stocks de base et des huiles de base combinant de façon inattendue un indice de viscosité élevée (au moins 130) et un rapport entre un cisaillement mesuré-cisaillement théorique élevé et une viscosité à basse température, à -30 ·C au plus. Elle concerne également une méthode de production des lubrifiants. Plus particulièrement, l'invention concerne de nouveaux lubrifiants à indice de viscosité élevée et faible viscosité pouvant être employés comme lubrifiants à large gamme de température, tels que des huiles hydrauliques, qui incluent de nouveaux stocks de base de faible viscosité, dont la viscosité à basse température présente un rendement amélioré. L'invention concerne en outre des méthodes de production des lubrifiants.

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