MIXED FLUOROPOLYMER COMPOSITIONS Russian patent published in 2017 - IPC C08L27/18 C08J3/12 C09D127/18 C09D5/03 

FIELD: chemistry.

SUBSTANCE: composition includes: low molecular weight polytetrafluoroethylene (LPTFE) having a number average molecular weight (M_n) of less than 500000 and an initial melting point (T_m) of 332°C or less, as a liquid dispersion of particles having an average particle size of 1.0 mcm or less, wherein the liquid dispersion comprises less than 1.0 wt % of the surfactant based on the LPTFE dispersion weight. The dispersion is prepared by emulsion polymerization and is not subjected to agglomeration, temperature degradation or irradiation, and perfluoroalkoxy (PFA) in the form of a liquid dispersion of particles having an average particle size of 1.0 mcm or less and having a melt flow rate (MFR) of, at least, 4.0 g/10 min, wherein the PFA content in the above composition is 37 to 65 wt %, and the LPTFE content is 35 to 63 wt % of the total solids of the above LPTFE and PFA.

EFFECT: mixed fluoropolymers composition can be used to prepare a coating with improved impermeability, stain resistance, wear resistance, smoothness and high contact angle values.

13 cl, 64 dwg, 5 tbl, 11 ex