Grease
US8703678B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2007 |
| Grant date | Apr 22, 2014 |
| Priority date | — |
| Expiry date | Oct 5, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2050/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A grease which comprises a base oil containing at least 50% by mass of a diester compound having a total carbon number of 28 to 40 and represented by the general formula (I):R1OOC—(R2)n—COOR3 (I)wherein R1 and R3 each independently represent a C4 to C20 monovalent aliphatic hydrocarbon group, R2 represents a C1 to C20 divalent hydrocarbon group and n is 0 or 1. The grease is excellent in both low-temperature performance and high-temperature performance and has low oil separation tendency even under high centrifugal force (acceleration). In particular, when the grease is used in a rotational transmission device having a built-in one-way clutch, the grease can provide satisfactory clutch engagement property (intermeshing ability) at low temperatures and a prolonged bearing life at high temperatures and is less apt to cause oil separation under high centrifugal force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.