EXPANDABLE MATERIAL WITH IMPROVED THERMAL INSULATION PROPERTIES AND USE THEREOF

The invention is directed to a thermally expandable composition comprising at least one polymer P, at least one chemical blowing agent CBA, at least one physical blowing agent PBA composed of expandable microspheres, and at least one filler F. The invention is also related to a damping element comprising a first layer (2) composed of an expansion material and a second layer (3) composed of an acoustic damping material. The damping element is suitable for providing vibration and/or noise damped systems.