期刊
PROGRESS IN ORGANIC COATINGS
卷 87, 期 -, 页码 75-82出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2015.05.016
关键词
Reactive; Phosphorus; Flame retardant; Dispersion; Synergistic
资金
- Technical Education Quality Improvement Programme (TEQIP)
A novel phosphorus containing reactive flame retardant was synthesized and incorporated successfully in polyurethane backbone to obtain flame retardant aqueous polyurethane dispersions (FRPUDs). The reactive flame retardant compound was synthesized by using phosphorus oxychloride (1 mole) and N-methylaminoethanol (3 mole). The structure of synthesized phosphorus containing triol was confirmed by FTIR, H-1 NMR and P-31 NMR spectrometry. Further, polyurethane prepolymer was modified with phosphorus containing triol compound in various amounts (30,40 and 50% on equivalent basis) and FRPUDs were prepared. PUD films were applied on wood and mild steel panels and air dried. It was then characterized for mechanical, chemical, thermal and flame retardant properties. It was observed that all FRPUDs exhibited good mechanical properties and improved flame retardancy as compared to the conventional one. The maximum limiting oxygen index (LOI) value of 37 was obtained for FRPUD containing 0.8 mass% of phosphorus and 1 mass% of nitrogen. The flame retardancy was greatly depending on the phosphorus content and increased with increase in phosphorus content. (C) 2015 Elsevier B.V. All rights reserved.
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