Accession Number : AD0693257

Title :   ADDITION OF POLYMERS TO GREASES.

Descriptive Note : Technical rept.,

Corporate Author : ARMY WEAPONS COMMAND ROCK ISLAND ILL SCIENCE AND TECHNOLOGY LAB

Personal Author(s) : Bish,Joseph M.

Report Date : JUL 1969

Pagination or Media Count : 17

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)

Descriptors :   (*GREASES, *LUBRICANT ADDITIVES), (*HALOCARBON PLASTICS, LUBRICANT ADDITIVES), POLYMERS, HIGH PRESSURE, STEARATES, SOAPS, LITHIUM COMPOUNDS, CALCIUM COMPOUNDS, FLUORINE COMPOUNDS

Subject Categories : Lubricants and Hydraulic Fluids

Distribution Statement : APPROVED FOR PUBLIC RELEASE