Premium wear resistant lubricant

C - Chemistry – Metallurgy – 10 – M

Patent

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Details

C10M 105/04 (2006.01) C10G 65/04 (2006.01) C10M 137/06 (2006.01) C10M 137/10 (2006.01) C10M 169/04 (2006.01)

Patent

CA 2340087

A premium synthetic lubricant having antiwear properties comprises a synthetic isoparaffinic hydrocarbon base stock and an effective amount of at least one antiwear additive. The antiwear additive is preferably at least one of a metal phosphate, a metal dialkyldithiophosphate, a metal dithiophosphate, a metal thiocarbamate, a metal dithiocarbamate, an ethoxylated amine dialkyldithiophosphate and an ethoxylated amine dithiobenzoate. Metal dialkyldithiophosphates are preferred, particularly zincdialkyldithiophosphate (ZDDP). The base stock is derived from a waxy, Fischer-Tropsch synthesized hydrocarbon feed fraction comprising hydrocarbons having an initial boiling point in the range of about 650-750 °F, by a process which comprises hydroisomerizing the feed and dewaxing the isomerate. The lubricant may also contain hydrocarbonaceous and synthetic base stock material in admixture with the Fischer-Tropsch derived base stock.

Lubrifiant synthétique de première qualité possédant des propriétés anti-usure et contenant une base d'hydrocarbure isoparaffinique, ainsi qu'une quantité efficace d'au moins un additif anti-usure. Cet additif est, de préférence, au moins un d'un phosphate de métal, d'un dialkyldithiophosphate de métal, d'un dithiophosphate de métal, d'un thiocarbamate de métal, d'un dithiocarbamate de métal, d'un dialkyldithiophosphate d'amine éthoxylé et d'un dithiobenzoate d'amine éthoxylé. Les dialkyldithiophosphates de métal sont préférés, en particulier, dialkyldithiophosphate de zinc (ZDDP). On obtient la base à partir d'une fraction paraffinique de charge d'hydrocarbure ayant subi une synthèse de Fischer-Tropsch et contenant des hydrocarbures dont le point d'ébullition initial est situé dans une plage de 650-750 DEG F, au moyen d'un procédé consistant à hydroisomériser la charge et à déparaffiner l'isomérat. Ce lubrifiant peut également contenir un matériau de base hydrocarboné et synthétique mélangé à la base obtenue par synthèse de Fischer-Tropsch.

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