Abstract: The present invention relates to a composite material, particularly a composite material designed as a molded body and/or suited for the production of molded bodies, composed of polymer materials and a porous mineral matrix, said composite material expanding under the action of liquids, particularly aqueous liquids and/or aqueous oil emulsions, and storing said liquids, characterized in that the matrix it comprises includes crushed and/or ground, open-pored, expanded/expanded perlite in the form of sharp-edged perlite particles and at least one natural and/or synthetic cross-linked and/or partially cross-linked polymer and/or polymer forming a hydrogel.

Abstract: A completely self-contained room dehumidifier having a water collector 1 that has an open top within which an abutment frame 2 for a water absorbent filler 3, consisting of hygroscopic material, particularly calcium chloride granulate, is suspended. The abutment frame 2 is in the form of a receptacle that has water drainage openings 4 facilitating drainage of water from the filler 3 into the water collector 1, when it becomes saturated with water absorbed from the ambient atmosphere. Furthermore, the water collector container 1 and absorbent receptacle 5 are designed as standard containers that are stackable one inside the other, with their widths and lengths, or diameters, being adapted to achieve this result, but, preferably, having different heights to create a water collection space within the collector 1, below a receptacle 5 nested therein.