Grease composition

X-ray tomography at SPring-8 accurately measures thickener distribution in grease, enhancing torque reduction by ensuring proper thickener dispersion and contact area, addressing inaccuracies in existing methods and improving energy efficiency.

JP2025162354APending Publication Date: 2025-10-27ENEOS CORP
View PDF 1 Cites 0 Cited by

Patent Information

Application Number
JP2024065606
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-04-15
Publication Date
2025-10-27

AI Technical Summary

Technical Problem

Existing methods for measuring thickener particle size in grease compositions are inaccurate due to the assumption of spherical particles, leading to ineffective torque reduction in grease compositions, and electron microscopy is limited by base oil evaporation in a vacuum.

Method used

A grease composition measured using X-ray tomography at the synchrotron radiation facility SPring-8 to accurately determine the three-dimensional distribution and volume ratio of the thickener, achieving a volume ratio of 50% or more, preferably 80%, which enhances torque reduction by increasing the thickener's contact area and rigidity.

Benefits of technology

The method provides a grease composition with reduced torque by ensuring proper thickener dispersion, suppressing flowability and stirring resistance, thereby improving energy efficiency.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 2025162354000008
    Figure 2025162354000008
  • Figure 2025162354000009
    Figure 2025162354000009
  • Figure 2025162354000010
    Figure 2025162354000010
Patent Text Reader

Abstract

To provide a grease composition having low torque.SOLUTION: The grease composition comprises a base oil (A) and a thickener (B). When the volume of each thickener is calculated using the BL20XU beamline at the large synchrotron radiation facility SPring-8, the proportion of the thickener having a volume smaller than 1.0×1012nm3 is 50% or more.SELECTED DRAWING: None
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Grease composition and rolling shaft bearing with the grease composition encapsulated

    JP2016204623A