Yang Xu-fen
2014
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Journal
Fine chemicals
Abstract
A novel halogen-free flame retardant aluminium hypophosphite( PAH) was synthesized from sodium hypophosphite monohydrate and aluminum sulfate octadecahydrate as base materials. The optimal reaction conditions were obtained: the reaction temperature being 90 ℃,the molar ratio of sodium hypophosphite monohydrate to aluminium sulfate octadecahydrate being 7. 5 ∶ 1. 0 and the reaction time being 3 h; the yield of aluminium hypophosphite was up to 98. 5%. The structure of product was characterized by means of infrared spectrometer and inductively coupled plasma atomic emission spectrometer. The application of PAH to polyurethane foam was investigated. The results show that the flame retardant polyurethane foam has LOI 30 and UL94 V- 0. This method is simple, environment-protecting and easy to be industrialized.