Applications of Nitrogen-phosphorus-silicon Flame Retardant Nonionic Waterborne Polyurethane in Leather Finishing
A flame-retardant nonionic aqueous polyurethane synthesized by 1,3,5-tri(2-hydroxyethyl)cyanuric acid and 3-aminopropyl triethoxysilane was used in leather finishing,and the flame-retardant test was carried out.Through vertical combustion(UL-94),limiting oxygen index(LOI),scanning electron microscopy,X-ray spectroscopy and other tests,it is found that the oxygen index of the leather treated with 100 parts of flame-retardant nonionic aqueous polyurethane added in the step of medium coating can reach 23.3％,and the vertical combustion can be up to the level of V-0.Combined with the basic performance indexes of leather abrasion resistance,it shows that the flame retardant polyurethane prepared can greatly improve the flame retardant performance while maintaining the abrasion resistance and aesthetic appearance of leather.
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