Retardation of rigid urethane foam | SOUFA INC.Boric acid flameretardant& Termiticide https://au.soufa.ltd Non-toxic and harmless to humans. Highly effective boric acid-based flame retardant for cellulose. It is also highly effective in termite preservation of wood. Mon, 06 Apr 2020 08:39:07 +0000 ja hourly 1 https://wordpress.org/?v=6.6.2 https://au.soufa.ltd/wp-content/uploads/2020/04/cropped-logo-32x32.png Retardation of rigid urethane foam | SOUFA INC.Boric acid flameretardant& Termiticide https://au.soufa.ltd 32 32 Retardation of rigid urethane foam (RPU) https://au.soufa.ltd/retardation-of-rigid-urethane-foam-rpu/ https://au.soufa.ltd/retardation-of-rigid-urethane-foam-rpu/#respond Mon, 06 Apr 2020 05:16:25 +0000 https://au.soufa.ltd/?p=154 A coating type flame retardant was made by mixing a small amount of starch based on a soufa 23% aqueous soluti […]

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]]> A coating type flame retardant was made by mixing a small amount of starch based on a soufa 23% aqueous solution.
It is applied to rigid urethane foam and its flame retardancy is confirmed.
As a result, it was able to withstand the 5-minute combustion test.

At the same time as the flame hit the rigid urethane foam surface, a foam layer was formed, and the starch carbonized to form a carbonized layer, forming a double film.
 
It is considered that a certain degree of performance can be imparted to the rigid urethane foam.

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