Lubricating oil mannich base dispersants derived from heavy...

Details Lubricating oil mannich base dispersants derived from heavy... Lubricating oil mannich base dispersants derived from heavy...

C - Chemistry, Metallurgy

10

M

C10M 159/16 (2006.01) C08F 8/32 (2006.01) C10L 1/14 (2006.01) C10L 1/22 (2006.01) C10L 1/238 (2006.01)

Patent

CA 2199171

An oil-soluble lubricating oil additive useful as a dispersant, comprising Mannich Base condensates of an alkyl (hydrocarbon or polymer) substituted hydroxy aromatic compound with an aldehyde and a heavy polyamine. A heavy polyamine is a mixture of polyalkylenepolyamines comprising small amounts of lower polyamine oligomers such as tetraethylene pentamine and pentahexamine but primarily oligomers with 7 or more nitrogens, 2 or more primary amines per molecule, and more extensive branching than conventional polyamine mixtures.

L'invention concerne un additif oléosoluble pour huiles de lubrification, pouvant être utilisé comme dispersant, comprenant des condensats de base de Mannich résultant de la réaction d'un composé aromatique hydroxy à substitution alkyle (hydrocarbure ou polymère) avec un aldéhyde et une polyamine lourde. Une polyamine lourde est un mélange de polyalkylènepolyamines comprenant de petites quantités d'oligomères polyaminiques inférieurs tels que la tétraéthylènepentamine et la tétraéthylènepentahexamine, mais principalement des oligomères ayant au moins sept atomes d'hydrogène et au moins deux atomes d'amine primaire par molécule, et présentant plus de ramifications que celles présentées par les mélanges polyaminiques classiques.

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