| 摘要 |
1402670 Flameproofing textiles AMERICAN CYANAMID CO 18 Dec 1973 [26 Dec 1972] 58628/73 Heading DIP [Also in Division C3] Tetratkis (hydroxymethyl) phosphonium oxalate and at least one organic nitrogenous compound having a trivalent nitrogen bearing at least two members selected from hydrogen atoms and methylol groups are applied from aqueous solution to a cellulosic textile material which is then heated to provide a cured flameretardant finish and soft hand thereon. The components may be applied from the same bath or from separate baths by padding, dipping or spraying. The nitrogenous compound may be urea, melamine, a triazinone, or a methylol or partially alkylated methylol derivative thereof such as mono, di or tetra-methylol urea, dimethylol melamine or a partially methylated trimethylol melamine, or a carbamate or methylol derivative thereof. The heating may be conducted in two stages, first drying at 167‹ to 250‹F and shubsequently curing at 300‹ to 350‹F for 2 to 5 minutes. In the case where the nitrogenous compound is urea, the N:P weight ratio may be between 0.5 and 5.0, preferably between 0.7 and 2.0 so that from 1 to 6% by weight P and from 1 to 10% N is left on the finished textile material. The textile material may contain at least 20% cellulosic fibres such as cotton, rayon, linen and jute. The cellulosic fibres may be blended with each other or with non-cellulosic fibres such as silk, wool, nylon, polyester and acrylic. The examples relate to the treatment of cotton with single aqueous solutions containing the oxalate, urea and a surfactant, drying at 225‹F and curing at 325‹F.
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