Technology for Wood and Natural Fiber-Based Materials

Research Project

Formaldehyde-free binding agents – modified with amino and naphthalene resins – for construction products with improved characteristics

The building industry is key to Germany’s economy. Anorganically bound wood-based materials are used for a variety of applications such as dry-walling and timber frame construction, as components for shell constructions and for façade cladding. They can also be found in ceilings, floors, walls, cladding for walls in damp rooms and in constructions intended to protect against fire or noise.

Due to Europe’s re-classification of formaldehyde as a class 1B carcinogen (substance is probably carcinogenic to humans), the industry will soon require formaldehyde-free binding agents and additives. In this project, we are currently developing binding agents which use formaldehyde-free resins based on melamine and naphthalene with improved characteristics for construction applications.

© Fraunhofer WKI | Manuela Lingnau

WPC boards

Plaster, cement, soluble glass and magnesite binders are the most significant anorganic binding agents for construction materials such as concrete, mortar or wood-based materials. Additives are often used during production to improve the workability of the binding agent and the properties of the construction product. Fluxing agents have a particularly strong liquefying effect and they result in a considerably reduced water requirement and/or an improved workability of the anorganic binding agent. Besides formaldehyde-free polycarboxylates (PCE), sulfonated naphthalene and melamine formaldehyde resins are primarily used as fluxing agents due to their better properties and lower price.

The overall objective of this project is to develop anorganically bound construction products (wood-based materials) with new functionality using formaldehyde-free resins based on melamine and naphthalene. Thanks to the new functional groups, the active principles of the polycarboxylates can be combined with those of the naphthalene and melamine resins. The result will be fluxing agents with new qualities which unite the properties of both systems and are also free of formaldehyde.

Durch die in Europa aktuell erfolgte Neueinstufung von Formaldehyd als Karzinogen der Klasse 1B (Stoff ist wahrscheinlich beim Menschen krebserzeugend) sind formaldehydfreie Binde- und Zusatzmittel in naher Zukunft für die Industrie erforderlich. 
Durch die in Europa aktuell erfolgte Neueinstufung von Formaldehyd als Karzinogen der Klasse 1B (Stoff ist wahrscheinlich beim Menschen krebserzeugend) sind formaldehydfreie Binde- und Zusatzmittel in naher Zukunft für die Industrie erforderlich. 

Project Partner

Fraunhofer-Institut für Angewandte Polymerforschung (IAP)

Funding

Own resources

Duration time:     01.06.2016 – 31.05.2018