Lubricating oil additive and lubricating oil composition...

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 110/10 (2006.01) C08F 8/42 (2006.01) C10M 159/18 (2006.01)

Patent

CA 2727738

A molybdated succinimide complex is disclosed which is prepared by a process comprising (a) reacting a succinimide of a polyamine of formula (I) wherein R is a hydrocarbon radical having a number average molecular weight of about 500 to about 5,000, a and b are independently 2 or 3, and x is 0 to 10, with an ethylenically unsaturated carboxylic acid or anhydride thereof, in a charge mole ratio of the ethylenically unsaturated carboxylic acid or anhydride thereof to the succinimide of formula (I) of about 0.9:1 to about 1.05:1; and (b) reacting the succinimide product of step (a) with an acidic molybdenum compound. Also disclosed is a lubricating oil composition containing at least (a) a major amount of a base oil of lubricating viscosity and (b) a minor amount of the molybdated succinimide complex.

L'invention concerne un complexe succinimide molybdaté qui est préparé par un processus consistant : (a) à faire réagir un succinimide de polyamine représenté par la formule (I), dans laquelle R est un radical hydrocarbure possédant un nombre de masse moléculaire moyenne compris entre environ 500 et environ 5000, a et b sont indépendamment 2 ou 3, et x est compris entre 0 et 10, avec un acide carboxylique éthyléniquement insaturé ou un anhydride de celui-ci, dans un rapport molaire des charges de l'acide carboxylique éthylèniquement insaturé ou de l'anhydride de celui-ci sur le succinimide représenté par la formule (1) compris entre environ 0.9:1 et environ 1.05:1; et (b) à faire réagir le produit succinimide de l'étape (a) avec un composé molybdène acide. L'invention concerne aussi une composition d'huile lubrifiante contenant au moins (a) une quantité majeure d'huile de base de viscosité lubrifiante et (b) une quantité mineure de complexe succinimide molybdaté.

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