SU518149A3 - Method of fire retardant finishing textile material - Google Patents

Description

The invention relates to the textile industry, in particular, to a method for the flame retardant finishing of textile material from natural and chemical fibers.

There is a method of fire retardant finishing of textile material from natural and chemical fibers by impregnating it with an aqueous solution of a polycondensation product of tetrakis (oxymethyl) phosphonium (THPC) with cyanamide mixed with a pre-condensate, for example, an aminoplast; when this is used, the product of polycondensation 1 mol of the specified phosphonium and 2 mol of cyanamide.

The known method of finishing does not provide the desired effect of fire resistance. In addition, fibrous materials have an unsatisfactory surface neck.

In order to improve the quality of the finishing of the material, it is proposed to use for the treatment of textile materials a product of the interaction of 1 mol TNRS with 0.02-0.5 mol of cyanamide (component 1), with a pH of 2-7.5. As the precondensate (component 2), polyfunctional epoxides or polyfunctional nitrogen compounds are used.

For refractory processing, fibrous materials are used: wood (wood, paper), fur, skins or preferably textiles, in particular fibrous materials from polyamides, cellulose, cellulose ethers, wool fabrics, polyesters or blended fabrics from polyester and cellulose with a ratio of 1: 4 - 2: 1. It is thus about the so-called 20/80, 26/74, 50/50 or 67/33 polyester-cellulose blended fabrics.

Cellulose or cellulose an integral part of the fibrous material is, for example, flax fiber, cotton fiber, rayon or staple fiber. In addition to blends of polyester fibers and cellulose, there are also blends of cellulose fibers with natural or synthetic polyamides. In particular, the fiber refractory materials are well made from wool fiber materials.

Aqueous preparations for imparting refractoriness to organic fibrous material, as a rule, contain 200-600 g / l, preferably 350-450 g / l, of component I and 20-200 g / l, preferably 40-120 g / l, of component 2. Preparations they usually have a pH from acidic to neutral or weakly basic, that is, from 2 to 7.5.

Preparations for refractoriness may in appropriate case also contain other additives. To form a thicker layer on fabrics, it is advisable to add 0.1-0.5% of high molecular weight polyethylene glycol. The drugs then can table 1

 The condensation product "- / / e / and-nonylphenol + 9 mol of ethylene oxide.

 See tab. I

table 2

Notes: T: heat setting (a)

F: „wet method (b) N:„ wet-method (c)

BUT add the usual plasticizers, such as aqueous polyethylene emulsion or silicone oil emulsion.

To improve the mechanical strengths of the fibers, suitable copolymers can be added to the preparations, for example N-methylol acrylamide copolymers or cationic copolymers.

Table 4

Table 5

Table b

Claims (2)

Example 1. Polyester cotton (PEF / HB) fabric (67/33), polyester fabric (PEF), cotton (HB) and wool gabardine (III) fabric are treated with a solution plus, dried at 80-100 ° С and then in cure for 5 minutes at 150 ° С (heat-setting method). In addition to this method, ammonia can also be used for fixation. The plus fabric is dried 80 ° C {incompletely), treated with ammonia gas for 5 minutes, then plus in a solution containing 300 ml of a 24% aqueous solution of ammonia per 1 liter and dried after 5 minutes in air at 80 ° C. The wool and polyester fabrics are washed for 5 minutes at 40 ° C in a solution containing 4 g of sodium carbonate and 1 g of a 25% aqueous solution of condensation product per 1 liter of liter; its nonylphenol and 9 mol of ethylene oxide, then washed and dried. Polyester cotton fabric or cotton fabric is washed for 5 minutes at 60 ° C or for 5 minutes at 95 ° C with a solution containing 5 ml of H2O2 (35%), 3 g of an aqueous solution of sodium hydroxide (30%) and 1 g per 1 l A 25% aqueous solution of the condensation product is 1 mol of p-tert-ROnylphenol and 9 mol of ethylene oxide. Then washed and dried. The fabrics are then up to 40 times for 45 minutes and at 40, 60 or 95 ° C are washed in an ordinary washing machine in a solution containing 4 g / l of ordinary detergent. Individual fabrics are then tested for fire resistance (untreated fabrics are burned). The results are shown in Table. 1-4. PR and me 2. Polyester-cotton (PEF / HB) fabric (67/33) and 50/50 are treated with the solutions given in table. 5 on plus and then, according to the following: a) analogously to example 1 by means of heat-setting, then washing at 60 ° C also analogously to example 1; b) partially according to the “wet fixation method: after addition at 10% residual moisture, incubated for 24 hours at a temperature of up to 50 ° C, then washed with cold water and then in a bath for 5 minutes containing 4 g / l of sodium carbonate and 1 g / l of condensation product with 1 mol of p-greg-nonylphenol and 9 mol of ethylene oxide, then washed with water and dried; c) partially according to the "wet fixation method: after addition, it is kept wet for 24 hours at 50 ° C, then washed in the same way as in b). The fabrics are then washed at 60 ° C up to 20 times in the same manner as in Example 1 and then tested for fire resistance. Untreated fabrics burn. The results are shown in Table. 6. The invention The method of flame retardant finishing of textile material from natural and chemical fibers by impregnating it with an aqueous solution of a polycondensation product of tetrakis (hydroxymethyl) phosphonium with cyanamide in a mixture with an amino pre-condensate or starting products at pH 2-7.5, drying and heat characterized in that, in order to improve the quality of the finishing of the material, a polycondensation product of 1 mol of tetrakis (oxymethyl) phosphonium with 0.2-0.5 mol of cyanamide is used.