초록 ▼

This invention relates to oil soluble, metal containing sulfonated polymers useful as additives for lubricating oils or hydrocarbon fuels and which are effective as dispersants. Such polymers of high molecular weight are also useful as viscosity-index improvers for the lubricating oils. The polymeri

This invention relates to oil soluble, metal containing sulfonated polymers useful as additives for lubricating oils or hydrocarbon fuels and which are effective as dispersants. Such polymers of high molecular weight are also useful as viscosity-index improvers for the lubricating oils. The polymeric dispersant additives are ionic polymers which comprise a backbone substantially soluble in the fuel or lubricant, and pendant ionic groups which are sulfonic acid groups neutralized with a metal compound. Polymeric dispersant additives of this type may be made which are also capable of imparting excellent viscosity improvement, varnish inhibition, oxidation inhibition and detergency to the lubricant. These additives may also impart rust preventive properties to the oil or fuel, and as V.I. improvers they can be formed to have particularly good low temperature viscosity effects in lubricating oil.

대표청구항 ▼

A composition comprising a major amount of a lubricating oil or a liquid petroleum fuel; and a hydrocarbon soluble ethylene-containing ionic polymer useful as a V.I.-dispersant additive, having a number average molecular weight in the range of about 5000 to 1,000,000, substantially free of polar cos

A composition comprising a major amount of a lubricating oil or a liquid petroleum fuel; and a hydrocarbon soluble ethylene-containing ionic polymer useful as a V.I.-dispersant additive, having a number average molecular weight in the range of about 5000 to 1,000,000, substantially free of polar cosolvent, formed by sulfonating an aliphatic olefin polymer comprising about 30 to 84.5 mole % ethylene, about 15 to 69.5 mole % C3 to C18 alpha olefin and about 0.5 to 20 mole % of C5 to C14 diolefin, with a non-chlorine-containing sulfonating agent, to form sulfonic acid groups, said sulfonated polymer being at least partly neutralized with a metal compound wherein said metal is selected from the group consisting of multivalent metals, wherein when said composition comprises a major amount of said lubricating oil, said composition contains 0.01 to 10 wt. % of said ionic polymer; and wherein when said composition comprises a major amount of said fuel, said composition contains 0.001 to 0.5 wt. % of said ionic polymer.