|
Flame retardant finishing of textiles as a protective function finishing, functional finishing fabrics have been the focus of research. However, currently used flame retardant cotton problem is there are more poor durability or generated during the production and use of environmentally harmful substances. Phosphorus flame retardants can be used as an environmentally friendly flame retardant, flame retardants and phosphorus flame retardant and has good application prospects, the researchers will typically phosphorus / nitrogen flame retardant system in the same study . Silicone-based flame retardants because of low harmful become a hot research topic, and silicon content in nature, and is easy to obtain. The topics to phosphorus oxychloride, methanol, phenol, amine, γ-aminopropyl triethoxysilane (Silane coupling agent KH-550) were synthesized as a raw material containing phosphorus / nitrogen flame retardant FR- PN and four kinds of reactive groups containing phosphorus / nitrogen / silicon flame retardant FR-PNS1, FR-PNS2, FR-PNS3, FR-PNSB, infrared, or nuclear magnetic its structural identification, that is the target substance synthesized product. Retardant preparation process is simple, convenient, without the use of flame retardants can be directly cross-linking agent reacts with the cellulose in the preparation and application process produces no formaldehyde, using ordinary rolling, baking, roasting process on cotton fabrics flame-retardant finishing, phosphorus element content in the fabric under conditions equivalent, compared screened better performance of a flame retardant and flame retardant its optimal synthesis process and finishing process were studied. The main conclusions of this problem are as follows: Conclusion: The phosphorus and nitrogen flame retardant cotton fabric is effective, silicon element added to an increase in effect of flame retardancy, a flame retardant phosphorus, nitrogen, silicon content increases with beneficial flame retardant, is not conducive to the increase of carbon flame. The comparison found, FR-PNS2 has good flame retardancy, a flame retardant FR-PNS2 the optimum synthesis conditions are: phosphorous oxychloride and Y-aminopropyl triethoxy silane ratio of the feed amount of material is 1.3:2, the reaction temperature was 65 ℃, the reaction time was 12 h. The flame retardant FR-PNS2 applied to cotton fabric flame retardant finishing, finishing process conditions: flame retardant amount of 200g / L, catalyst suitable dosage 25g / L baking temperature of 170 ℃. Experiments show that fire-retardant finishing of cotton fabrics crease recovery angle was 80 ° raised to 98 °, fabric strength loss within an acceptable range, tear strength greater losses. The flame retardant of sodium hydrogen phosphite catalyst curing treatment under conditions of cotton fabric, cotton fabric treated with a fire retardant after washing performance.
|