Lubricating oil composition

A balanced formulation of base oil, metal nanoparticles, polymer, and phenolic compound in lubricating oil compositions addresses the challenges of wear resistance and thermal stability in electric vehicles, ensuring effective performance and reduced filter clogging.

WO2025205972A1PCT designated stage Publication Date: 2025-10-02IDEMITSU KOSAN CO LTD
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Patent Information

Application Number
PCT/JP2025/012078
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-03-28
Filing Date
2025-03-26
Publication Date
2025-10-02

AI Technical Summary

Technical Problem

Lubricating oil compositions for electric vehicles need to balance excellent wear resistance and thermal stability while minimizing the risk of filter clogging and reducing insulating properties due to high content of metal-based nanoparticles and polar polymers.

Method used

A lubricating oil composition comprising a base oil, metal-based nanoparticles, a polymer with a linear alkyl group and heteroatom, and a phenolic compound, with controlled content ratios to ensure effective dispersion and interaction of components, thereby enhancing wear resistance and thermal stability while maintaining insulating properties.

Benefits of technology

The composition achieves improved wear resistance, thermal stability, and storage stability suitable for electric vehicle components, reducing filter clogging and preserving insulating properties.

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Abstract

Provided is a lubricating oil composition that can be suitably used in electric vehicles and that exhibits superior abrasion resistance, thermal stability, etc.　The lubricating oil composition contains: a base oil (A); metal-based nanoparticles (B); a polymer (C) having a 10-28 C chain alkyl group and a hetero atom; and a phenolic compound (D). The content of the metal-based nanoparticles (B) is less than 1.5 mass % based on the total amount (100 mass %) of the lubricating oil composition, and the content of the polymer (C) is less than 2.0 mass % on the basis of the total amount (100 mass %) of the lubricating oil composition.
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Citation Information

Patent Citations

  • Viscosity index improver and lubricating oil

    JP1995292378A

  • Viscosity index improver and lubricating oil composition

    JP2002194372A

  • metalworking fluid

    JP2003503543A

  • Star-shaped polymer and its lubricating composition

    JP2013536879A

  • Polymeric inorganic nanoparticle compositions, methods for their preparation, and their use as lubricants

    JP2021512188A