Perstorp, Sweden -- Perstorp has highlighted its range of Charmor polyols -- "essential components for a new, ground-breaking, generation of intumescent coatings," a 13 April company statement said.
The Swedish speciality chemical company said micronised and supermicronised Charmor polyols create an advanced char barrier for steel and wooden structures, adding that, when exposed to fire, "intumescent coatings with Charmor swell 10 to 100 times their original thickness to form an insulating carbon char barrier that protects the substrate for a longer period of time than any other comparable product."
According to Perstorp, the coating helps prevent the substrate from catching fire or distorting when it is exposed to temperatures over 250ºC. The intumescent process starts at 250ºC, steel loses its strength at around 550ºC, the company added.
"At very high temperatures, steel profiles distort and become weaker, which can lead to collapse," said Adrian Harden, Charmor product manager. "Intumescent coatings applied to surfaces within a building win crucial time. Our Charmor range has been developed to ensure the very best in performance and protection for a longer time than any comparable product," Harden added. (RD)