Polymeric surfactant compounds

Abstract

The present disclosure relates to a lubricant composition of an oil of lubricating viscosity, a polymeric surfactant compound that is an acylated polymer having a number average molecular weight of from about 500 to about 50,000 wherein the polymer comprises a branched olefin having from 8 to 30 carbon atoms. The acylated polymer may be further reacted with an amine or alcohol to form an amide, imide, ester, or a combination thereof. The present disclosure further relates to lubricant compositions exhibiting good dispersibility and viscosity properties.

Description

technical field [0001] The present disclosure relates to an oil of lubricating viscosity, a lubricant composition of a polymeric surfactant compound, the polymeric surfactant compound being an acylated polymer, wherein the polymer has a number average molecular weight of from about 500 to about 50,000, And the polymer contains branched chain olefins having 8 to 30 carbon atoms. Acylated polymers can be further reacted with amines or alcohols to form amides, imides, esters, or combinations thereof. The present disclosure further relates to lubricant compositions that exhibit good dispersibility and viscosity properties. Background technique [0002] Lubricating oil compositions for lubricating mechanical devices comprise a base oil of lubricating viscosity or a mixture of such oils, and additives for improving the performance characteristics of the oil. For example, additives are used to improve detergency and dispersion, reduce wear, provide stability against heat and oxid...

AI Technical Summary

Problems solved by technology

However, using higher levels of additives can significantly increase the viscosity of the lubricant composition and make it difficult to obtain lower oil viscosity grades such as 0W-8, 0W-16, 0W-20 and 0W-30

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