FIRE-RETARDING COMPOSITION FOR FABRIC OF SPECIAL PURPOSE OF MOLESKINE TYPE BASED ON AFLAMMIT-SAP AND SILICON DIOXIDE Russian patent published in 2016 - IPC D06B1/00 

FIELD: chemistry.

SUBSTANCE: wide practical use for fire-proof finishing of cellulose-containing tissues of special purpose, including Moleskine (dense and strong cotton fabric produced by reinforced sateen weave), found flame retardants based on organic nitrogen-phosphorus compounds. Aflammit SAP - Tetrakis(oxymethyl)phosphonium chloride (hereinafter TPC) relates to compounds of this kind. However, at present moment there is a problem of TPC are on woven material. Existing technology of finishing Aflammit SAP fabric has some shortcomings: 1. Large number of steps and labour intensity of process of application and fixation. 2. High environmental risk and fire and explosion hazard (ammonia, its dangerous action in case of accident, in production, in recycling). 3. Reduced tensile strength. Disclosed is a method of applying commercial antipyrrite preparation "Aflammit SAP" on Moleskine, alternative multistep, fire-explosion- and environmentally hazardous industrial method. In disclosed fixation of Aflammit SAP on fabric surface is carried out without using ammonia, but using a solution of 1,4-dibromobutane in non-aqueous solvent. Technology of application Aflammit SAP on Moleskine 1. Before application of fire-retardant composition tissue samples are held for 72 hours in water, changing said water every 24 hours. 2. Drying samples. 3. Treating with hot steam. 4. Application of anti-pyrrhite composition based on aqueous solution of Aflammit SAP (600 g of preparation of Tetrakis(oxymethyl)phosphonium chloride (Aflammit SAP) in 1,000 g H₂O) on samples of moleskine by padding method. 5. Heat fixing composition at temperature 150 °C for 15 minutes. 6. Application of fabric samples 9.22 % solution of 1,4-dibrombutane in carbon tetrachloride with addition of 3.5 wt% silicon dioxide (commercial preparation "Kovelos^®"). 7. Atmospheric drying of treated samples.

EFFECT: wide practical use for fire-proof finishing of cellulose-containing fabric of special purpose.

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