Process for producing a non-combustible moulded article, especially a building panel
AssigneeThermax Brandschutzbauteile GmbH
InventorErwin Tomandl
Life of this patent
Estimating the term…
Abstract
A process is proposed for producing non-combustible moulded articles from blown vermiculite, the blown vermiculite granules being mixed with an inorganic binder and then pressed. The blown vermiculite granules are mixed with a solution of an inorganic binder, the vermiculite granules once mixed are pre-pressed, cut to the shape required and the cut blanks are pressed non-continuously at at least room temperature and preferably at temperatures of at least 100° C. and pressures of at least 0.3 N/mm2 to ensure that all solvent residues are removed from the finished non-combustible moulded article.
Claims21
In a process for the production of a nonflammable molded part in which vermiculite granulate is expanded at an elevated temperature and then mixed with a binding agent, following which a bulk load of a compressed cake is formed of the granulate that has been coated with adhesive and pressed into a nonflammable molded part, wherein a coating of adhesive solution of an inorganic binding agent is applied to the expanded vermiculite granulate, that the expanded vermiculite granulate that is furnished with the adhesive coating is then subjected to preliminary compression, continuously or discontinuously, and further custom cut and that these custom-cut parts undergo discontinuous compression at room temperature or higher, and pressures of at least 0.3 N/mm2, so that all solvent residues are removed from the finished, nonflammable molded part;
- wherein the improvement comprises the selection of said solution of inorganic binding agent with the proviso that said inorganic binding agent of said solution consists of an inorganic compound based on acids that contain phosphorus and/or their salts and said solution of inorganic binding agent includes a hydrophobizing agent based on an organo-silicon compound.
In a process for producing a nonflammable molded part which comprises:
- coating expanded vermiculite granulate with a solution of an inorganic binding agent to form a bulk cake of expanded vermiculite granulate coated with said binding agent, said bulk cake having two sides;
- continuously or discontinuously precompressing said bulk cake to form a compressed cake;
- cutting said compressed cake into individual pieces;
- compressing said individual pieces discontinuously to form said nonflammable molded part, said compressing of said individual pieces being performed at room temperature or higher and at a pressure of at least 0.3 N/mm2, whereby solvent residue is removed from said nonflammable molded part;
- wherein the improvement comprises the selection of said solution of inorganic binding agent with the proviso that said inorganic binding agent of said solution consists of an inorganic compound based on acids that contain phosphorus and/or their salts and said solution of inorganic binding agent includes a hydrophobizing agent based on an organo-silicon compound.
Dependencies are inferred from the claim text.