Di-secondary alkyl hindered phenol antioxidants

C - Chemistry – Metallurgy – 10 – M

Patent

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C10M 141/00 (2006.01) C07C 215/50 (2006.01) C10M 133/14 (2006.01) C10M 141/06 (2006.01) C10M 141/08 (2006.01) C10M 141/10 (2006.01) C10M 169/04 (2006.01)

Patent

CA 2521096

A lubricating composition containing the reaction product (a) of an aldehyde, amine and a di-secondary alkyl hindered phenol and at least one additive selected from the group consisting of hydrocarbyl diphenylamines, sterically hindered phenols other than component (a), metal hydrocarbyl dithiophasphates, sulphurised olefins and mixtures thereof. The composition has antioxidant properties for internal combustion engines without the bioaccumulation of tristert-butyl phenol.

L'invention concerne une composition lubrifiante contenant le produit de réaction (a) d'un aldéhyde, d'un amine et d'un phénol entravé par un alkyle bi-secondaire et au moins un additif sélectionné parmi le groupe comprenant hydrocarbyl diphénylamines, des phénols entravés au niveau stérique autres que les composés (a) hydrocarbyl dithiophosphates métalliques, des oléfines sulfurées et des mélanges correspondants. Cette composition possède des propriétés antioxydantes pour moteurs à combustion interne et n'entraîne pas la bioaccumulation de tris-tert-butyl phénol.

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