Making fabrics water-repellent with fluorine-containing silane in supercritical carbon dioxide medium

It was shown that fluorine-containing silane, 2,2,3,3,4,4,5,5,5,6,6,7,7-tridecafluoro-N-[3-(triethoxysilyl)propyl]-heptane amide, is an effective water-repellent for different fabrics. Its application from solution in supercritical carbon dioxide followed by heat treatment gives the surfaces of fabrics stable water-repellent properties. The use of SC-CO2 as a universal medium for treating fabrics allows eliminating the use of organic solvents, which significantly reduces the ecological load on the environment, simplifies the manufacturing process, and makes it safer.