Phopsphorus-containing condensation products, their...

Details Phopsphorus-containing condensation products, their... Phopsphorus-containing condensation products, their...

C - Chemistry, Metallurgy

07

F

117/34, 8/93.17,

C07F 9/50 (2006.01) C07F 9/54 (2006.01)

Patent

CA 1096404

ABSTRACT OF THE DISCLOSURE Water-soluble condensation products of tetrakis (hydroxymethyl)phosphonium compound as durable flame retardants for treating textile articles. However, the condensation reaction proceeds with difficulty and, moreover, the products have a very disagreeable odor due to coexisting low molecular phosphines and, when applied to textile articles, they require a large amount of fixing agents, giving a stiff hand and low strength. These difficulties are avoided by the process of the invention which comprises producing having a soluble phosphorus-containing condensation product having a molar ratio P-CH2-P linkage/P-CH2OCH2-F linkage of 0.8 - 4.0 by heating a tetrakis (hydroxymethyl) phosphonium compound under reduced pressure and acid conditions to condense it by dehydration and deformaldehydration reaction.

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