ADDITION OF POLYMERS TO GREASES.
Abstract
Several polymeric additives were added to a calcium hydroxy stearate grease, a lithium soap grease, and a clay-thickened grease. Maximum extreme-pressure properties occurred when 4 percent (by weight) of polytetrafluoroethylene (PTFE) was added to the calcium hydroxy stearate grease and to the lithium soap grease, and when 7 percent was added to the clay-thickened grease. The addition of a polymer in concentrations from 4 to 7 percent should not adversely affect any of the physical or chemical properties of a grease. A calcium hydroxy stearate grease and a lithium soap grease were prepared containing 4 percent PTFE, and oxidation and corrosion inhibitors. Wear, corrosion, and water-washout tests indicate no harmful effects from the addition of the PTFE; and greatly improved extreme-pressure properties. The addition of a fluorinated ethylene propylene polymer shows a moderate increase in extreme-pressure properties. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1969
- Accession Number
- AD0693257
Entities
People
- Joseph M. Bish