CATION-EXCHANGE FLUORINATED MEMBRANE FOR ELECTROLYSIS AND METHOD OF MAKING SAID MEMBRANE Russian patent published in 2010 - IPC C25B13/08 C25B9/00 

FIELD: chemistry.

SUBSTANCE: cation-exchange membrane for electrolysis which includes a fluoropolymer which contains an ion-exchange group and a porous base is distinguished by that, on the surface of the anode side of the membrane there are projecting parts with a fluorine-containing polymer which contains an ion-exchange group; 20≤h≤150, where h is the average height (mcm) from the surface of the anode side of the membrane to the top of the projecting parts; 50≤P≤1200, where P is distribution density (number/cm²) of the projecting parts; 0.001≤S≤0.6, where S is the ratio of area of the bottom surfaces of the projecting parts to the total area of the anode side of the membrane; and T≤0.05, where T is the ratio of the area of the top parts of the projecting parts to the total area of the anode side of the membrane.

EFFECT: invention enables obtaining a membrane with stable operational characteristics with retention of electrochemical properties and mechanical strength.

9 cl, 1 tbl, 7 ex