Lubricant composition containing ionic liquid

A lubricant composition with high solubility in methyltrioctylammonium-bis(fluorosulfonyl)imide and polar base oil addresses the limitations of CFx-containing ionic liquids, offering enhanced tribological properties and thermal stability up to 180°C, simplifying manufacturing and reducing environmental impact.

JP7876784B2Active Publication Date: 2026-06-22KLUEBER LUBRICATION MUENCHEN GMBH & CO KG
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Patent Information

Application Number
JP2025503018
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2022-07-21
Filing Date
2023-05-11
Publication Date
2026-06-22
Estimated Expiration
2043-05-11

AI Technical Summary

Technical Problem

Existing lubricant compositions using ionic liquids with CFx groups are non-biodegradable, persistent, and require complex manufacturing processes, limiting their use to non-polar base oils and exhibiting lower thermal resistance, while bis(fluorosulfonyl)imide-based ionic liquids have insufficient thermal stability.

Method used

A lubricant composition comprising a base oil with high solubility in methyltrioctylammonium-bis(fluorosulfonyl)imide and a high proportion of polar base oil, eliminating the need for BTA-containing ionic liquids, achieving good tribological properties and temperature stability up to at least 180°C.

Benefits of technology

The lubricant composition provides improved tribological properties, conductivity, and thermal stability without using biodegradable CFx groups, allowing for a high proportion of polar base oil and simplified manufacturing.

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Abstract

A lubricant composition comprising: a) 20 to 99.5% by weight of a base oil based on the total weight of the lubricant composition, the base oil having a solubility of at least 3% by weight in the ionic liquid methyltrioctylammonium-bis(fluorosulfonyl)imide at room temperature of 20 °C, the base oil having at least 50% by weight of base oil A based on the total weight of the base oil, base oil A having a solubility of at least 3% by weight in the ionic liquid methyltrioctylammonium-bis(fluorosulfonyl)imide at room temperature of 20 °C, 20 to 99.5% by weight of a base oil based on the total weight of the lubricant composition; and b) 0.5 to 80% by weight of an ionic liquid having an anion of bis(fluorosulfonyl)imide, based on the total weight of the lubricant composition.
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