Lithium soap grease additive
US4536308A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1984 |
| Grant date | Aug 20, 1985 |
| Priority date | — |
| Expiry date | Oct 1, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2010/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An experimental grease has been formulated with 8.5 wt % lithium 12-hydroxystearate in a base oil containing an additive composition of a synergistic blend of zinc dialkyldithiophosphates, zinc diamyldithiocarbamate, aromatic amine phosphate, sulfurized sperm oil substitute and the reaction product of coconut oil and diethanolamine. The lithium 12-hydroxystearate grease has been prepared by a standard kettle procedure. The grease composition exhibits a dropping point in the range expected of a lithium complex grease. The grease keeps its soap fiber structure intact at 390.degree. to 400.degree. F., typical of the melting range of lithium 12-hydroxystearate greases. The grease is useful for its long life in constant velocity joints.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.