COATING COMPOSITION COMPRISING AN AQUEOUS DISPERSION OF FLUOROPOLYMER PARTICLES

摘要

A coating composition having (i) an aqueous dispersion of fluoropolymer particles comprising a non-melt processible polymer of tetrafluoroethylene, (ii) a fluorinated surfactant, (iii) a non-ionic non-fluorinated surfactant and (iv) a non-fluorinated polymer, wherein the fluorinated surfactant is selected from fluorinated carboxylic acids or salts thereof of the general formula (I):
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ [R f -O-L-COO - ] i X i+ €ƒ€ƒ€ƒ€ƒ€ƒ(I)
wherein L represents a linear partially or fully fluorinated alkylene group or an aliphatic hydrocarbon group, R f represents a linear partially or fully fluorinated aliphatic group or a linear partially or fully fluorinated aliphatic group interrupted with one or more oxygen atoms, X i+ represents a cation having the valence i and i is 1, 2 or 3.