Novel tetrapotassium azo diphosphonate (INAZO) as flame retardant for polyurethane adhesives

Design and Utilization of Nitrogen Containing Flame Retardants Based on N-Alkoxyamines, Azoalkanes and Related Compounds

“…The action mechanism of the developed INAZO flame retardant was suggested to be mainly in the condensed phase. UL 94 V-0 rating was achieved in the vertical burning test when 10 wt% loading of INAZO was used, whereas the reference flame retardant APP required a loading of 20 wt% to reach the V-0 classification[53].…”

Synthesis of NR based Polyurethanes containing phosphorylated polymers as chain extenders

“…The preparation was repeated several times during the course of work, with a yield ranging from 75 to 80% for each synthesis. DEAMP (1), 1 To a solution of glycerol (0.46 g, 5 mmol, 1 equiv.) in dry dichloromethane (5 ml) was added under nitrogen atmosphere, imidazole (0.85 g, 12 mmol, 2.5 equiv.).…”

“…Polymers with a phosphorus content demonstrated specific properties for many applications such as adhesives [1], bio-compatible materials [2], anti-corrosive coatings [3], complexation matrixes [4], fuel-cells membranes, molecularly imprinted polymers [5] and flame retardant (FR) polymers [6]. More particularly, the Polyurethanes containing some phosphorus elements are well documented in the literature.…”

“…More particularly, the Polyurethanes containing some phosphorus elements are well documented in the literature. Indeed such Polyurethanes find applications in various domains such as foams [7,8], adhesives coatings [1], automotives [9] and FR polymers, either through an additive or a reactive pathway [10][11][12][13][14][15]. The Polyurethanes are in majority derived from an exothermic reaction between di-isocyanates and hydroxyl-telechelic oligomers [16,17] even if the literature describes other methodologies such as Non Isocyanate Polyurethanes (NIPU) to synthesized from liquid HTNR and demonstrated a higher thermal stability compared to other commercial based analogues [26].…”

“…),(10) was obtained in bright yellow viscous liquid (5.3 g, 0.9 mmol, 93%).Poly(ADEP) (10),1 H NMR (CDCl 3 ): δ (ppm) 4.92-4.82 (m, chain-end, -OCH(CH 2 ) 2 -), 4.45-4.00 (br, chain -O(CH 2 ) 2 O-and -POCH 2 CH 3 ), 3.80-3.70 (m, chain-end, -OCH[(CH 2 )OH] 2 ), 3.34 (t, chain-end, CH 3 (CH 2 ) 10 CH 2 CS 3 -), 2.60-2.25 (br, chain -CH-CH 2 -), 2.10-1.55 (br, chain -CH-CH 2 -), 1.35 (t, -POCH 2 CH 3 ), 1.27 (m, chain-end, CH 3 (CH 2 ) 10 CH 2 CS 3 -), 1.22 and 1.15 (s, chain-end -C(CH 3 ) 2 COOCH-), 0.88 (CH 3 (CH 2 ) 10 CH 2 -S-C-). FTIR.…”