Farbe 2019

•••6••• Innovationen Excess WORKWEAR Deutschland GmbH www.excess-workwear.de Halle: 8 • Stand: 311 Josef Kränzle GmbH & Co.KG www.kraenzle.com Halle: 8 • Stand: 121 Korff AG www.korff.ch Halle: 7 • Stand: 110 MIXOL-PRODUKTE Diebold GmbH www.mixol.de Halle: 6 • Stand: 113 Nichtaussteller: Bruns & Debray GmbH www.bruns-debray.de Messe- telegramm Anzeige Foam sample with EDA-DOPO in a flame test in the Empa laboratory Photo: Empa New ame retardant for wood Scientists develop colourless additive that provides re protection A new flame retardant for wood and wood-based materials has been developed by Swiss research institute Empa in cooperation with an industry partner. The colourless additive, which can be easily mixed with coatings and cellulose materials, opens up new appli- cations for wood processing com- panies. Fire protection requirements are increasing worldwide – especial- ly in public buildings and vehicle construction. This development means that more and more oth- erwise suitable materials such as wood can no longer be used in many buildings or means of trans- port and must be substituted by other products. The aim of the research project was therefore to develop a flame retardant that in- creases the fire resistance of such materials without impairing the positive properties of the materi- als. The new flame retardant called AFA (Anti-Flame-Additive) meets these re- quirements: It is colourless and can be mixed with water-based paints or UV protective coatings and can be used not only as a coating but also as an additive in wood-based panels. In addition, it is free of bromine and boron and contains no halogenated organic compounds. It produces no toxic vapours and devel- ops its flame-retardant effect at con- centrations as low as ten per cent. AFA is based on the substance EDA-bis-TEPT developed by Empa, a flame retardant from the class of organophosphonates. It combines phosphorus and nitrogen moieties in a single molecule, which has flame-retardant effects on cellu- lose. The newly developed additive has already demonstrated its effectiveness in internal tests and has been protected by a patent application since 2018. Appli- cation tests are currently being carried out, for example the addition of AFA to various commercially available build- ing materials and paint systems is being tested. Initial tests with major wood- based panel manufacturers have been very positive. The same ap- plies to the world’s third largest manufacturer of HPL (High Pres- sure Laminates). After the AFA has been introduced into the cellulose during production, flaming of the material is reliably prevented. In a further step, AFA will undergo the fire protection and approval tests required for approval. Another flame retardant devel- oped at Empa is called EDA-DOPO and is already one step further on the way to commercial applica- tion. EDA-DOPO belongs to the class of phosphonamidates, con- tains no halogens that are harm- ful to the environment and has been registered in the EU chemical database REACH since autumn last year. EDA- DOPO is currently used for mattress foams. Applications in the coating tech- nology as well as in the plastic produc- tion are also in exploration. Laser cut decorative wooden and HPL-el- ements can be equipped with fireproof- ing now. Photo: Bruag AG Begrünte Fassaden helfen gegen Hitze Wissenschaftler von der Universi- tät zu Köln und dem Forschungs- zentrum Jülich haben gezeigt, dass grüne Fassaden nicht nur das Hausklima positiv regulieren, son- dern auch gesundheitsschädliche Stickoxide und Feinstaubpartikel absorbieren und filtern. Das Team um Professor Dr. Hans Georg Edel- mann vom Institut für Biologiedi- daktik der Uni Köln hatte die Tagestemperatur-Verläufe von efeubegrünten Fassaden im Ver- gleich zu klassischen, verputzten Hausfassaden sowie die fassaden- nahe Luftfeuchte über mehrere Wochen aufgezeichnet. Dabei zeigte sich, dass Efeu, wie auch andere (Kletter-)Pflanzen, im Sommer nachhaltig kühlend und im Winter wärmeisolierend auf die Fassaden wirkt: Es gab keine starken Temperaturunterschiede wie bei den unbegrünten Haus- fassaden. So zeigte die grün be- wachsene Fassade im Sommer im unteren Temperaturbereich Tem- peraturschwankungen von 10 bis 13 Grad Celsius am Tag, während die Temperatur von blanken Haus- fassaden um bis zu 35 Grad Celsius schwankte. Die Kölner Forscher konnten zeigen, dass Efeu die ge- sundheitsschädlichen Stickoxide absorbierte und den Feinstaub filtrierte.