| abstract |
40 à 90 % de bitume, 10 à 50 % de polyuréthanne thermoplastique, 0 à 10 % d'huile aromatique, 0 à 50 % de charges, 0 à 0,5 % de catalyseur. The subject of the present invention is a prefabricated waterproofing membrane formed of a support, coated on at least one face, and preferably impregnated with a core, of a composition based on modified bitumen, characterized in that the composition thermoplastic coating and / or impregnating bituminous material is a thermoplastic polyurethane modified bituminous binder having the following weight formulation: 40 to 90% bitumen, 10 to 50% of thermoplastic polyurethane, 0 to 10% of aromatic oil, 0 to 50% of charges, 0 to 0.5% catalyst. |