Isovolta- Osterreichische Isolierstoffwerke Aktiengesellschaft

Rene-Hagen Voelkl

Felix Wehrmann

Edwin Wojta

An improved building material element or board having good thermal insulation properties comprising expanded vermiculite granules coated with 2 to 30% by weight, based on the weight of vermiculite, with an organic binder formed into a press cake which is then press heated to form the building element, the improvement comprising that at least a portion of the coated vermiculite granules are recycled particles which increases the density and has a more uniform and more easily sized surface and a process for its preparation.

Growing community of inventors

Maria Enzersdorf, Austria

Rene-Hagen Voelkl