| abstract |
The present invention relates to a structure comprising a substrate and at least one first layer applied to the substrate and made of a thermoplastic composition comprising at least one functionalized polyolefin obtained either by copolymerization or by grafting of a polyolefin backbone with an unsaturated monomer comprising an anhydride, acid or epoxide function, said functionalized polyolefin being grafted with polyether units comprising a terminal amine, by means of reactive extrusion, as a breathable waterproof material having a water vapor permeability of at least 300 g/m 2 24 h −1 measured according to the standard ASTM E96, method BW (38° C./50% relative humidity), for a film of 25 μm. n It also relates to the use of such a composition as a breathable waterproof material having a water vapor permeability of at least 300 g/m 2 24 h −1 (measured according to the standard ASTM E96, method BW 38° C./50% relative humidity), for a film of 25 μm. |