Substrate having a hydrophilic coating has a low coefficient of friction and method for its preparation

摘要

P the invention relates to a substrate carrying a hydrophilic coating having a low coefficient of friction and a process for its preparation. / p & & p & it takes on a substrate 40 of the interpolymer of polyvinylpyrrolidone and 42 of the polyurethane according to a process which consists in applying to the substrate a polyisocyanate and a polyurethane in a solvent such as methyl ethyl ketone, and then in evaporating the solvent; if the substrate is made of polyurethane, it suffices to use the polyisocyanate, it is then applied to the treated substrate, polyvinylpyrrolidone, in a solvent and the solvent is evaporated off. / p & & p & the invention applies in particular to the tubular items such as a catheter, preservatives and the tubes in peristaltic pumps. / p