USE OF SURFACTANTS WITH HIGH MOLECULAR WEIGHT AS FILTERABILITY-ENHANCING AGENTS IN HYDRAULIC LUBRICANTS

The invention concerns a lubricating fluid comprising: 1) a predominant amou nt of oil with appropriate lubricating viscosity; and 2) between 0.03 % and 0.06 % of a filterability-enhancing agent correspondin g to the following formula: R-Z in which Z represents: (i) a succinic ester acid comprising...

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Bibliographic Details
Main Authors CAZIN, JACQUES, LE SAUSSE, CHRISTOPHE, CLEMENT, OLIVIER, BATELIER, DOMENIQUE
Format Patent
LanguageEnglish
French
Published 04.09.2007
Subjects
CHEMISTRY
FUELS
INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATINGCOMPOSITIONS
LUBRICANTS
LUBRICATING COMPOSITIONS
METALLURGY
PEAT
PETROLEUM, GAS OR COKE INDUSTRIES
TECHNICAL GASES CONTAINING CARBON MONOXIDE
USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
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Summary:The invention concerns a lubricating fluid comprising: 1) a predominant amou nt of oil with appropriate lubricating viscosity; and 2) between 0.03 % and 0.06 % of a filterability-enhancing agent correspondin g to the following formula: R-Z in which Z represents: (i) a succinic ester acid comprising the reaction product of succinic anhydride and an aliphatic polyhydric alcohol; or (ii) a succinimide comprising the reaction product of succinic anhydride and a polyamine, said reaction product being subjected to a postcure with a cyclic carbonate, boric acid or a boric acid derivative; and R represents a polyolefin having a molecular weight (Mn) of 500 to 2500 and a Mw/Mn ratio of 1 to 5. This fluid is particularly suitable for hydraulic systems a nd has improved filterability characteristics.
Bibliography:Application Number: CA19982257800