Multipurpose lubricant based on phosphorous and sulphur...

Details Multipurpose lubricant based on phosphorous and sulphur... Multipurpose lubricant based on phosphorous and sulphur...

C - Chemistry, Metallurgy

10

M

C10M 141/10 (2006.01) C10M 141/08 (2006.01)

Patent

CA 2403009

The invention concerns a multipurpose lubricant comprising at least a phosphoric ester (A) of general formula (I) wherein: k = 2 or 3; m is a number from 0 to 8; x = 1 or 2 and R represents a linear alkyl or alkenyl radical with 10 to 20 carbon atoms or a salt of such an ester, and at least a polysulphide (B) of general formula: R'-S¿y?-R' wherein y is a number ranging from 2 to 8 and R' represents a tertio-alkyl radical with 4 to 18 carbon atoms, the volume ratio ranging between 0.01/1 to 1/1.

Le lubrifiant multifonctionnel selon l'invention comprend au moins un ester phosphorique (A) de formule générale: (I) dans laquelle k est égal à 2 ou 3, m est un nombre allant de 0 à 8, x est égal à 1 ou 2 et R représente un radical alkyle ou alcényle linéaire ayant de 10 à 20 atomes de carbone ou un sel d'un tel ester, et au moins un polysulfure (B) de formule générale: R'-Sy-R' dans laquelle y est un nombre allant de 2 à 8 et R' représente un radical tertio- alkyle ayant de 4 à 18 atomes de carbone, le rapport massique A/B étant compris entre 0,01/1 et 1/1.

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