Helping building materials stay cool
An intumescent system is a combination of various compounds that in the event of fire react together as a result of the temperature increase to form a carbon foam. This foam attains a thickness of 10 to 100 times of the originally applied coating and insulates the substrate material through its low thermal conductivity.
Steel loses its structural stability during fires, when temperatures exceed 500 °C. Examples for such steel constructions are public buildings like airports, shopping malls, hospitals and office complexes. Intumescent coatings form a highly efficient carbon foam rapidly at about 200 °C. The foam protects the steel from fire-related heat and helps keeping its structural integrity.
Wood is still one of the most widely used construction materials. As a key ingredient for intumescent coatings our flame retardants also ensure outstanding fire protection for various types of wood.
As a principal supplier of the key ingredient ammonium polyphosphate, Clariant has comprehensive experience in raw materials for intumescent coatings and in the development of intumescent coating formulations, either water or solvent based.
The Exolit® AP Products used are fine, white powders based on ammonium polyphosphate.
Service for our customers
Clariant has been a leading supplier of phosphorus based flame retardants for more than 30 years. We are in a position to support our customers to develop suitable intumescent coating formulations.
In our laboratory at Knapsack, Germany, we can compare the performance of a range of different formulations using standard fire tests. Thereby, we can support our customers in developing new formulations for meeting new standards or challenges in fire safety requirements.
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