Preparation and Characterization of Excellent Flame Retarded Rigid Polyurethane Foams

Abstract:

Rigid polyurethane foams were excellent thermal insulation materials with widely used, which was highly flammable at the same time. In order to obtain safe application, flame retarded polyurethane foams were needed. In this paper, series flame retarded rigid polyurethane foams were prepared with loading different flame retardants such as ammonium polyphosphate, expandable graphite, red phosphorus, Tri (2-chloroethyl) phosphate and dimethyl methylphosphonate. The effects of flame retardants on the foaming-process and flame retardant property of the rigid polyurethane foams were investigated by otary viscometer and limiting oxygen index. The results showed that the combination of solid and liquid flame retardants was necessary to improve the flame retardant and different flame retardants played synergistic roles in rigid polyurethane foams. The limiting oxygen indexes of the foams could be up to 30wt% and 29.6% with 25wt% solid flame retardants and 10wt% liquid retardants, respectively.

• Periodical: Advanced Materials Research (Volumes 374-377)
• Pages: 1563-1566
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.374-377.1563
• Online since: October 2011
• Authors: An Zhen Zhang, Yi He Zhang
• Keywords: Liquid Flame Retardant, Rigid Polyurethane Foam, Solid Flame Retardant

References

[1] H. Maosong: Polyurethane, in Chinese. Forum Vol. 88, 2009.

[2] Charles A. Wilkie, Alexander B. Morgan in: Fire Retardancy of Polymeric Materials, Second Edition, US：CRC Press (2009), p.765.

DOI: 10.1201/9781420084009-s

[3] G. Camino, S. Duquesne, R. Delobel et al: Abstracts of papers of the American Chemical Society. 220(2000), pp.333-334

[4] Sophie Duquesne et al: Polymer Degradation and Stability. 74(2001), p.493–499.

[5] A Konig, U Fehrenbacher, T Hirth et al: Journal of Cellular Plastics. 44(2008), pp.469-480