发明授权
US4615917A Surface penetrating fluoropolymer lubricant 失效
表面渗透含氟聚合物润滑剂

Surface penetrating fluoropolymer lubricant
摘要:
The invention is a composition for coating surfaces with a thin film containing fluoropolymer particles, a method for producing this composition, as well as a method for applying it to a surface. More particularly, the composition includes a carrier lubricant, such as mineral oil, which has particles of a fluoropolymer, such as polytetrafluoroethylene, well dispersed within it. A solvent, such as 1,1,1-trichloroethane, is blended with the fluoropolymer containing carrier lubricant, most preferably in a one to one ratio. The result is a low viscosity dispersion of the carrier lubricant, which itself has a dispersion of the fluoropolymer particles. When the composition is applied to a surface, the lowered viscosity aids in obtaining a thinner film of the lubricant and also enhances the penetration of the lubricant into the surface. Advantageously, the solvent is allowed to evaporate from the surface, thus leaving an even thinner film of the lubricant. Also, the evaporation of the solvent returns the lubricant to a higher viscosity which is better retained on the surface. Preferably, the lubricant also contains a phosphate ester, such as tricresyl phosphate, which is thought to aid in dispersing the fluoropolymer particles in the lubricant, and in attaching the fluoropolymer particles to the surface.
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