Prepolymers of Chloroalkyl Phosphonates and Polyethylenimine as Flame Retardants for Cotton-Containing Fabrics

Abstract

Water-soluble prepolymers of predominantly monomeric (Antiblaze 78) and dimeric (Antiblaze 77) chloroalkyl phosphonates and polyethylenimine (PEI) were prepared and applied to lightweight cotton containing fabrics These prepolymers imparted flame resistance to all-cotton fabrics and to a lesser degree to cotton poly ester blends. The most effective prepolymers were prepared from 3:1 mole ratios of Antiblaze 78:PEI and 2:1 or 3:1 Antiblaze 77:PEI. High levels of add-on were required for flame retardance. Flame retarded cotton fabrics had a full bodied hand, were pale yellow in color, and were durable to 10 laundering cycles. The Antiblaze:PEI finishes had little effect on resilience of all cotton fabrics; retentions of breaking strength and abrasion resistance were high.

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References

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Rowland, S. P., Bertoniere, N. R., and Roberts, E. J., un published results.