Charmor is Perstorp's brand of micronized polyols used for producing high performance intumescent coatings. The Charmor products serve as the carbon donor in intumescent coatings, which in conjunction with a blowing agent and acid source produce a char layer when exposed to fire. This Char layer protects the underlying substrate, limiting structural damage and facilitating the evacuation of the impacted structures.
Overall, intumescent coatings work as follows:
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