Synthesis and application of a durable phosphorus/silicon flame-retardant for cotton

A durable phosphorus/silicon flame-retardant SP, which was applied on cotton fabric, was synthesized successfully with dimethyl phosphonate and methyl vinyl dichloride silane Its synthetic conditions were studied and chemical structure was confirmed by infrared spectroscopy (IR). In addition, application of the flame-retardant to the treatment of cotton fabrics was investigated. This flame-retardant system was based on polycarboxylic acids and acidic catalysts. An optimized procedure was determined by evaluating the various finishing conditions, such as flame-retardant dosage, cross-linking agent dosage, catalyst dosage, pH value of the finishing liquor, curing temperature and curing time, and the influence of additives on the effect of flame-retardant. When it was applied to the finishing of the cotton, a durable flame-retarding fabric was obtained.