Patent ID: 6461998
Filing Date: 2002-10-08
Classification: B29C,B29K,C08J,C08L,C10M,C10N

Abstract:
A method for obtaining a low friction coefficient and an improved reduction of the noise among moving mechanical parts, comprising applying to said parts a lubricant composition in the form of dispersions comprising a fluorinated oil, a perfluoropolymer and water, wherein said dispersions are characterized in that they are dilutable with water even up to a concentration of 1% by weight of fluorinated oil+(per)fluoropolymer and in that they are obtained by mixing:a) a fluorinated oil having a (per)fluoropolyether structure and lubricant capability, having a number of average molecular weight higher than 1,300, b) a concentrated aqueous dispersion of a (per)fluoropolymer (component bâ€²), stabilized by a non ionic and non fluorinated surfactant, wherein the (per)fluoropolymer concentration is in the range 40-75%, c) a fluorinated and/or hydrogenated surfactant, d) water, e) optionally a fluorinated solvent having no lubricant properties, low boiling and having a number average molecular weight lower than 1,000, and eliminating the aqueous supernatant layer if after mixing step if the system separates in two phases.