Lubricating oil compositions

The lubricating oil composition with amine functionalized olefin copolymer dispersant and molybdenum-containing compounds addresses the challenges of low viscosity lubricating oils by enhancing fuel economy, wear protection, and anti-corrosion properties in internal combustion engines.

US20260132352A1Pending Publication Date: 2026-05-14INFINEUM INT LTD
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Patent Information

Application Number
US19/381342
Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Priority Date
2024-11-08
Filing Date
2025-11-06
Publication Date
2026-05-14

AI Technical Summary

Technical Problem

Existing lubricating oil compositions for internal combustion engines face challenges in maintaining low viscosity while ensuring good film thickness for durability and wear protection, reducing sludge and soot-induced viscosity increase, and providing anti-oxidation and anti-corrosion properties, while also meeting fuel economy and seal compatibility requirements.

Method used

A lubricating oil composition comprising a combination of amine functionalized olefin copolymer dispersant, alkaline earth metal salicylate and/or sulfonate detergents, molybdenum-containing compounds, antioxidants, and sulfurized fatty acid esters, which provides excellent viscosity, oxidation, wear, and anti-corrosion properties, especially for spark or compression ignited engines.

Benefits of technology

The composition achieves improved fuel economy, reduced wear, and enhanced anti-corrosion performance, while maintaining low levels of sulfated ash and phosphorus, and ensuring seal compatibility, thus addressing the challenges of low viscosity lubricating oils in internal combustion engines.

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Abstract

This invention relates to a lubricating oil composition having reduced viscosity and improved fuel economy comprising: a) 50 to 99 wt % of one or more Group III, III+, and / or IV base oils; b) 0.1 to 15 wt % of a functionalized olefin copolymer having an Mn of from 10,000 to 35,000 g / mol; c) 0.1 to 20 wt % of one or more detergents comprising at least one calcium detergent having a TBN of more than 100 mg KOH / g; at least one calcium detergent having a TBN of 100 mg KOH / g or less; and at least one magnesium detergent, where the difference in the TBN's for the Ca detergents is at least 100 mg KOH / g; d) 0.01 to 40 wt % of one or more dispersants comprising at least one borated dispersant and at least one non-borated dispersant; e) 0.01 to 20 wt % odsulfurized fatty acid ester; f) 0.01 to 5 wt % of one or more amine or phenol based antioxidants; and g) 0.001 to 15 wt % of molybdenum-containing compound.
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