Lubricating composition containing emulsion-sludge inhibitors
AssigneeEthyl Corporation
InventorsRodney I. Barber, David K. Walters
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Abstract
A lubricating oil composition for use in the crankcase of an internal combustion engine, having improved resistance to the formation of emulsion-sludge in the area under the engine rocker cover, which contains the combination of an oxyalkylated alkylphenol-formaldehyde condensation product and tetra polyoxyethylene polyoxypropylene derivative of ethylene diamine.
Claims12
A lubricating oil composition comprising a major amount of lubricating oil and a minor emulsion-sludge inhibiting amount of the combination of (a) an oxyalkylated alkylphenol-formaldehyde condensation product and (b) a tetrapoly(oxyethylene)-poly(oxypropylene) derivative of ethylene diamine.
An additive concentrate adapted for addition to lubricating oil to provide a formulated lubricating oil suitable for use in the crankcase of an internal combustion engine, said concentrate containing an amount sufficient to inhibit emulsion-sludge when said formulated lubricating oil is used in said engine of (a) an oxyalkylated alkylphenol-formaldehyde condensation product, and (b) a tetra-poly(oxyethylene)-poly(oxypropylene) derivative of ethylene diamine.
Dependencies are inferred from the claim text.