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Z. Brzozowski, N. Pietruszka, L. Żabski


2,3-Dibromo-2-butene-1,4-dioI (DBBD) - a new ecological reactive fire retardant useful for self-extinguishing polyurethane foams. Part II. Intercomparison of technological properties of DBBD and dibromoneopentyl glycol (DBNPG)

Polimery 1999, No 6, 421


DOI: dx.doi.org/10.14314/polimery.1999.421


Summary

DBBD was found to be more efficient than DBNPG as fire retardant for polyurethane foams: the oxygen index of DBBD-containing foams was by 0.5-1 % higher than that of DBNPG-containing foams (Fig. 1). When examined over the range of 0-30 wt. % of DBBD contents, the compression strength of polyurethane foams containing 20 wt. % (economically optimum content) of DBBD of DBNPG was higher with the former (about 245 kPa) than with the latter fire retardant (240 kPa). Thermal resistance of the DBBD-flame retarded foams was higher (140-155 °C) than that of DBNPG-retarded foams (133-148 °C). As the amount of the fire retardant was increased, the resistance decreased (Fig. 3). When added in amounts of up to 40 wt. %, DBBD was found to stabilize the linear dimensions of the foams; with DBNPG, the dimensions changed visibly and they did the more so, the higher was the DBNPG content (1.5 % at 40 % DBNPG) (Fig. 4). Water absorption and closed-cells content were found to be affected by neither DBBD nor DBNPG.


Keywords: flame retardancy of polyurethane foams, 2,3-dibromo-2-butene-l,4-diol as flame retardant, dibromoneopentyl glycol as flame retardant, comparison of service properties of flame-retarded foams

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