Use of aqueous dispersions of vdf-based polymers in the preparation of paints for coatings of architectural substrata

摘要

Use for the preparation of paints for substrata coatings of aqueous dispersions of VDF-based polymers having an average particle size between 0.260 and 0.3 micrometers comprising a bifunctional surfactant of formula:

         A-R_f-B     (I)

wherein
A = -O-CFX-COOM; B = -CFX-COOM with X = F, CF₃;
M = NH₄, alkaline metal, H;
R_f is a linear or branched perfluoroalkyl chain, or a (per)fluoropolyether chain such that the number average molecular weight of (I) is in the range 600-800.