Can be used intumescent paint on wood
Intumescent Fire Retardant Acrylic Coatings: Effects of Additive Ratio
Ammonium polyphosphate (APP), pentaerythritol (PER) and expandable graphite (EG) were used as intumescent additives by varying their ratios as 1: 1: 3 or 1: 3: 1 or 3: 1: 1. APP, PER and EG were used as the acid source, carbonating agent and propellant, respectively. Despite the different roles of APP, PER and EG, the physical mechanism of exfoliation of graphite played an important role in fire protection in all compositions.
Differences in scope of protection
With higher loads from EG the fire resistance time was higher. However, there were clear differences in the scope of protection when testing in the furnace under one-dimensional heat transfer conditions (bench-scale) in contrast to three-dimensional large-scale tests. Parameters that are not inherent in the coating system, such as cohesion, cracking, delamination from the substrate, rapid and non-directional expansion and even higher heat flows that occur at the edges of the I-steel section, influence the fire behavior.
The study was published in Progress in Organic Coatings Volume 150, January 2021.
This specialist book describes classic CN-based paints, radiation-curing systems and modern powder paints for coating wood, MDF and paper foils. Guide formulations and current processes for wood and wood-based material coating are presented in detail. The authors also take into account market economy aspects - ecologically and economically in equal measure. Furthermore, the paint application and paint recovery as well as drying and hardening processes, quality testing and control are explained. A comprehensive basic work for the practice of wood coating.
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