Mineral gear oils and transmission fluids

C - Chemistry – Metallurgy – 10 – M

Patent

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Details

C10M 101/02 (2006.01) C10M 169/04 (2006.01)

Patent

CA 2374501

This invention relates to mineral oil based gear oils and transmission fluids which comprise a major amount of a mineral oil having an iodine number of less than 9 and where at least 55 % of the saturates are aliphatic, and gear oil or transmission fluid additives. In one embodiment, the invention relates to a gear oil or transmission fluid composition comprising a major amount of lubricant basestock and at least one functional additive wherein a major amount of the lubricant basestock comprises a mineral oil having an iodine number of less than 9 and comprising at least 45 % by weight of aliphatic saturates. These gear oils and transmission fluids have good viscosity and oxidation properties.

L'invention concerne des huiles pour engrenages à base minérale et des liquides à transmissions qui comprennent une quantité importante d'une huile minérale possédant un nombre d'iode de 9 au maximum et dont au moins 55 % des composants saturés sont aliphatiques, ainsi que des additifs liquides d'huiles pour engrenages ou liquides à transmissions. Dans un mode de réalisation, l'invention concerne une composition d'huile pour engrenages ou liquide à transmissions qui comprend une quantité importante d'une matière de base lubrifiante et au moins un additif fonctionnel, une quantité importante de la matière de base lubrifiante comprenant une huile minérale possédant un nombre d'iode de 9 au maximum et dont au moins 45 % en poids des composants saturés sont aliphatiques. Ces huiles pour engrenages et liquides à transmissions possèdent de bonnes propriétés de viscosité et d'oxydation.

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