Tractor hydraulic fluid compositions and preparation thereof

C - Chemistry – Metallurgy – 10 – M

Patent

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Details

C10M 171/02 (2006.01) C10M 105/00 (2006.01) C10M 119/00 (2006.01) C10M 159/20 (2006.01)

Patent

CA 2700630

A tractor hydraulic fluid composition is prepared from an isomerized base oil which: a) the product itself, its fraction, or feed originates from or is produced at some stage by isomerization of a waxy feed from a Fischer-Tropsch process ("Fischer-Tropsch derived base oils"); or b) made from a substantially paraffinic wax feed ("waxy feed"). In one embodiment, the tractor hydraulic fluid composition is characterized as having a reduced level of viscosity modifier in an amount of 0 to 10 wt. %, and a Brookfield viscosity at -35~C of less than 70,000 mPa.s.

La présente invention concerne une composition de fluide hydraulique pour tracteur qui est préparée à partir d'une huile de base isomérisée où : a) le produit lui-même, sa fraction ou la charge provient de ou est produit à un certain stade par isomérisation d'une charge cireuse à partir d'un procédé de Fischer-Tropsch (= huile de base dérivée de Fischer-Tropsch =); ou b) constitué à partir d'une charge de cire sensiblement paraffinique (= charge cireuse =). Dans un mode de réalisation, la composition de fluide hydraulique pour tracteur est caractérisée en ce qu'elle possède un modificateur de niveau de viscosité réduit en une quantité de 0 à 10 % en poids, et une viscosité de Brookfield à -35°C inférieure à 70 000 mPa.s.

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