Perfectionnements apportés aux membranes semi-perméables

摘要

Novel method of making a semi-permeable membrane having a perhalogenated olefin substrate by grafting onto such substrate acrylic acid or other hydrophilic acid groups. The grafting is accomplished by forming a grafting medium comprising water, olefinically unsaturated hydrophilic acid moiety and an inorganic polymerization inhibitor for the homopolymerization of said hydrophilic acid which is a salt of a polyvalent metal; immersing perhalogenated olefin polymer substrate in the grafting medium; and then subjecting such to ionizing radiation sufficient to cause grafting of said hydrophilic acid onto said perhalogenated olifin polymer substrate.