Grease composition and sealing device using same
US12221588B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 8, 2022 |
| Grant date | Feb 11, 2025 |
| Priority date | — |
| Expiry date | Mar 8, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2050/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
There is provided a grease composition which is supplied between a plurality of lips provided in a sealing device that seals between a pair of members that rotate relative to each other, wherein the grease composition comprises a base oil (A), a thickening agent (B) and a rust preventive agent (C); a kinematic viscosity of the base oil (A) at 40° C. is 30 to 80 mm2/s; the thickening agent (B) is a diurea compound represented by Formula (1); and the composition comprises 5 to 15% by mass of the thickening agent (B) and 0.1 to 2.0% by mass of the rust preventive agent (C) based on the total of the grease composition. R1—NHCONH—R2—NHCONH—R3 (1)wherein R2 is a divalent aromatic hydrocarbon group having 6 to 15 carbon atoms, and R1 and R3 are a linear or branched alkyl group having 8 to 22 carbon atoms.Thus, a grease composition is provided, which can suppress a torque difference due to a rotation direction and exhibits excellent sealing properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.