Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Bayer Aktiengesellschaft

Gert Kossatz

Heinz Sattler

Karsten Lempfer

Wolfgang Heine

Dietmar Schapel

Hanns I Sachs

Rudiger Kammerer

The invention relates to a building panel constructed in layers, including main layer with a mixture of binder and reinforcing additive, and at least one further layer which can be a facing and/or intermediate layer, the further layer including a reinforcement and a binder. The formation of a homogeneous transitional layer betwee the main layer and the further layer insures that the composition of the components of the individual layers changes gradually so as to provide a stable multilayer panel which was improved elastomechanical properties.

Building panel constructed in layers

A process for manufacturing a multilayer building panel in which one layer s a main layer comprising a binder and a reinforcing additive, and another layer contains a binder and a reinforcement such as a mat includes depositing the various layers such that one layer is deposited with an excess of water for hardening, and another with a deficiency, so that the water is caused to migrate between layers and creates a transition layer providing a gradual and continuous transition in composition between the layers.

Process for manufacturing a building panel

The present invention is directed to a process for the manufacture of plasterboard optionally strengthened with reinforcing materials by mixing gypsum capable of rehydration with water and optionally reinforcing materials and subsequently pressing the resulting mixture, characterized in that polyisocyanates are added to the mixture used for producing the plasterboard and/or are applied to the surface of the finished plasterboard. The invention is also directed to the optionally reinforced plasterboard.

Reinforced plasterboard and method of forming

Growing community of inventors

Braunschweig, Germany

Gert Kossatz