Coating processes – With post-treatment of coating or coating material – Heating or drying
Patent
1985-04-11
1986-08-26
Page, Thurman K.
Coating processes
With post-treatment of coating or coating material
Heating or drying
208 18, 252 12, 252 58, 4273882, B05D 302, C10M10552
Patent
active
046082824
ABSTRACT:
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 medium, such as a synthetic base stock, which has particles of a fluoropolymer, such as ground and sintered polytetrafluoroethylene, well dispersed within it. A solvent, such as 1,1,1-trichloroethane, is blended with the fluoropolymer containing carrier medium, most preferably in either a 32 to 1 ratio or an 8 to 1 ratio. The result is a low viscosity dispersion of the carrier medium, 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 grease and also enhances the penetration of the fluoropolymer particles into the surface. Advantageously, the solvent is allowed to evaporate from the surface, thus leaving an even thinner film of the grease. Also, the evaporation of the solvent returns the grease to a higher viscosity which is better retained on the surface. Preferably, the grease also contains a phosphate ester, such as tricresyl phosphate, which is thought to aid in dispersing the fluoropolymer particles in the grease, and in attaching the fluoropolymer particles to the surface.
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Page Thurman K.
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