Sulphur-containing calixarenes, metal salts thereof, and...

C - Chemistry – Metallurgy – 10 – M

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C10M 159/22 (2006.01) C07C 321/30 (2006.01) C10M 135/30 (2006.01)

Patent

CA 2274617

This invention relates to a composition comprising at least one sulphur- containing calixarene represented by formula (I) or a metal salt of said calixarene, wherein Y is a divalent bridging group, at least one of said bridging groups being a sulphur atom; R3 is hydrogen, a hydrocarbyl or a hetero-substituted hydrocarbyl group; either R1 is hydroxyl and R2 and R4 are independently either hydrogen, hydrocarbyl or hetero-substituted hydrocarbyl, or R2 and R4 are hydroxyl and R1 is either hydrogen, hydrocarbyl or hetero- substituted hydrocarbyl; and n is a number having a value of at least 4. In one embodiment, the foregoing salt is an overbased salt. The invention also relates to additive compositions and finished lubricating oil compositions containing the foregoing overbased salt. The invention also relates to a process for making the foregoing overbased salt.

L'invention concerne une composition renfermant au moins un calixarène à base de soufre, de formule (I), ou un sel métallique correspondant. Dans la dite formule, Y est un groupe de pontage bivalent, au moins l'un desdits groupes de pontage étant un atome de soufre; R?3¿ est hydrogène, un groupe hydrocarbyle ou un groupe hydrocarbyle hétéro-substitué; soit R?1¿ est hydroxyle et R?2¿ et R?4¿ sont indépendamment hydrogène, hydrocarbyle ou hydrocarbyle hétéro-substitué, soit R?2¿ et R?4¿ sont hydroxyle et R?1¿ est hydrogène, hydrocarbyle ou hydrocarbyle hétéro-substitué; et n est un nombre au moins égal à 4. Selon une variante, le sel susmentionné est un sel hyperbasique. L'invention concerne également des compositions tenant lieu d'additifs et des compositions finies tenant lieu de lubrifiants, qui contiennent le sel hyperbasique en question. L'invention concerne en outre un procédé relatif à la fabrication dudit sel hyperbasique.

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