Stankiewicz Gmbh

Carsten Kliwer

Christoph Kittel

Gerhard Burak

Ehrenfried Blumel

Cornelia Diessel

Cornelia Peters

The invention relates to a viscoelastic damping foam with an adhesive surface for adhesion coupling to vibrating surfaces, for solid-borne sound absorption. The viscoelastic damping foam is obtained through the stoichiometric reaction of a polyisocyanate with at least two polyols of the polyether type which are incompatible with one another.

Viscoelastic damping foam having an adhesive surface

For manufacturing a composite foam, having acoustic properties, foam flakes (,) of differing sizes, differing origins, and/or differing material compositions are wetted with a small quantity of a polyurethane dispersion binding agent. The mixture is subsequently combined to a molded part (,) or to continuous web and under the effect of hot (water) steam or microwave energy is cured and subsequently dried. The composite foam can be used for sound insulation purposes in vehicles and in general machinery construction, and also in building construction.

Method of manufacturing a composite foam from foam flakes, composite foam, and use of this composite foam

The invention relates to a process for recycling thermosetting polyurethane soft foams in which they are comminuted in a mill, irrespective of their initial shape, density and structure, and are then pressed under the influence of pressure and elevated temperatures to high-strength sheets of various structures.

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Nienhagen, Germany

Carsten Kliwer