Alkenyl-substituted dicarboxylic acid or anhydride ester...

C - Chemistry – Metallurgy – 07 – C

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C07C 69/593 (2006.01) C07C 57/13 (2006.01) C07C 67/03 (2006.01) C07H 13/04 (2006.01) C08F 8/14 (2006.01) C10M 145/16 (2006.01)

Patent

CA 2230786

Alkenyl-substituted dicarboxylic acid or anhydride ester derivatives, useful as dispersant additives in lubricating oil compositions, having an alkenyl group derived from an atactic propylene oligomer substantially of formula (I), where n is in the range 15 to 120, having number average molecular weight (Mn) in the range 700 to 5000, and molar ratio dicarboxylic acid or anhydride moieties:atactic propylene oligomer in the range 1:1 to 2:1, and having an ester group derived from a polyol; a process for their preparation; and lubricating oil compositions and concentrates containing them.

Dérivés d'anhydride ester ou d'acide dicarboxylique substitué par alcényle utiles comme additifs dispersants dans les compositions d'huile de lubrification, comportant un groupe alcényle dérivé d'un oligomère de propylène atactique sensiblement de formule (I), dans laquelle n est compris entre 15 et 120, la masse moléculaire numérique moyenne (M¿n?) se situe dans l'intervalle 700-5000 et le quotient molaire fractions acide dicarboxylique ou anhydride:oligomère propylène atactique est de l'ordre de 1:+ à 2:1, présentant un groupe ester dérivé d'un polyol. Sont décrits un procédé de préparation de ces substances et des compositions et des concentrés d'huile de lubrification les contenant.

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