Lubricating oil composition containing a dispersing- varnish...

Details Lubricating oil composition containing a dispersing- varnish... Lubricating oil composition containing a dispersing- varnish...

C - Chemistry, Metallurgy

10

M

253/100, 253/60

C10M 141/06 (2006.01)

Patent

CA 1100932

ABSTRACT OF THE DISCLOSURE The combination of an oil-soluble polyol ester reaction product havinga number average molecular weigh (?n) of from about 1,309 to 8,000, e.g., the reaction product of polybutenyl succinic anhydride with pentaerythritol which reaction product can be borated, if desired, and an oil-soluble acylated nitrogen compound having a (?n) of from about 1,300 to 8,000, e.g. polybutenyl succininc anhyd- ride reacted with an alkylene polyamine, such as tetraethylene pentamine, which nitrogen compound can be borated, if desired, are surprisingly useful as combined additives for lubricating oils to increase the dispersancy and varnish inhibition properties of said oil when one part per weight of said polyol ester preaction product is comb- ined with from 0.2 to 4, preferably 1 to 3, parts by weight of said acylated nitrogen compound.

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