CS201239B3 - Method of flameproof finish of polyester fibres or webs - Google Patents

Description

The invention relates to an apoeobic flame retardant treatment of polyester fibers and sheet materials, based on the fact that the surface treated with pleionomeric copolyesters of terephthalic acid and 5-sulfoisophthalic is treated with quaternary flame retardants.

The impregnating agents hitherto used for the flame-retardant treatment of textile materials are in particular suitable solutions of inorganic salts alone or in mixtures with one another. Significant are especially ammonium salts, boric acid and some of its compounds. The ammonium salts used are ammonium amido sulfonate and ammonium phosphate, most often in combination with urea or ammonium sulfate. It is known to mix boric acid and borax alone, or with the addition of middle ammonium phosphate.

From the group of organic compounds, halogen derivatives - bromine, chlorine -, organophosphorus compounds, nitrogen compounds, are used alone or in synergistic mixtures.

In practice, flame retardant treatments based on preparations that are added to the fiber mass negatively affect some properties of textile materials: dullness, whiteness, dirtiness and eu economically unattractive. The most commonly used non-flammable treatment method based on the use of non-flammable finishes worsens the feel and the treatment has a relatively low wash stability.

The above-mentioned drawbacks are overcome by the method according to the invention, which is based on the fact that it

201 239

Z01 239 to a material treated with pleionomeric copolyesters of terephthalic acid and 5-sulfoisophthalic acid is treated with a 4% solution of quaternary phosphonium compounds, preferably tetrakia / cyancentyl / phaphonium bromide, or tetrakia / hydroxymethyl / phaphonium bromide / triethylenium / triethylenebium / triethylenebia binding of the quaternary cation to the anion of the sulfo group of the pleionomer occurs.

The advantages of the proposed method of non-flammable treatment of polyester materials are that the treatment involves chemical bonding of the kattone non-combustible composition to the anionically treated surface of the polyester material, thereby achieving durability of treatment without compromising laziness and whiteness while maintaining good feel. The treated material aa is characterized by a lower static charge and by washing the dirt in the washing process.

In óaáa, this type of adjustment is exemplified by examples of bass making that aa lan solely apply to these types.

Example 1

Dimethyl terephthalate and 5 mol. % of the bis (hydroxyethyl) -5-sulfoisophthalic acid sodium salt and ethylene glycol a and condensed at 204 ° C for 135 min in the presence of zinc acetate catalyst. The product obtained had a melting point of 67.8 ° C and a viscosity limit of 5.72 ml / g. The product ea was dispersed in water and from the dispersion was applied to the fulards on a polyester fabric in an amount of 4% by weight of the material. Fabric aa burst at 90 ° C for 30 minutes and then aa settled at 150 ° C for 3 minutes. purple and the fabric was impregnated with 4% tetrakia / cyanoatyl / phosphonium bromide solution for 10 min at room temperature. The fabric was then washed.

The non-flammability of the material was evaluated by determining the limit oxygen numbers. The cut-off oxygen number of the treated material was 27.8 compared to 20.6 for the treated material. At the same time, aa decreased the surface potential from 2.6 kV to 0.3 kV. The L01 value after 30 wash cycles was 25.2 and after the fifth dry cleaning cycles was 26.8.

Example 2

Procedure as in Example 1, but with the nonionic treatment of the surface aa using a preparation containing 20 mol% of hydroxyethyl 5-sulfoisophthalic acid sodium salt. The batch temperature of the product is 213 ° C. The product obtained has a melting point of 102.9 ° C and a viscosity limit of 7.07 ml / g. The fabric was impregnated with a 4% solution of tetrakiahydroxymethyl foaphonium chloride.

This fabric treated fabric had an oxygen limit of 29.2 compared to 20.6 for the untreated fabric. The electric surface potential aa decreased from .2 kV to 0.8 kV.

Example 3

Procedure as in Example 1 β by using β preparation of 15 mole% sodium hydroxyethyl-5-sulfoisophthalic acid for anionic surface treatment. Fabric aa was impregnated with a 4% ethylene-bia / tria / 2-cyanoethyl / phosphonium bromide solution.

Claims (2)

A method of flame-retardant treatment of polyester fibers or sheet materials with quaternary phosphonium compounds, characterized in that the material treated with pleionomeric copolyesters of terephthalic and 5-sulfoisophthalic acid according to the invention no. 201 238 is treated with a 4% solution of quaternary phosphonium compounds at a temperature of 10 to 30 ° C. 2. The process according to claim 1, wherein tetrakla / cyanoethyl / phosphonium bromide, tetrakia / hydroxymethyl / phosphonium chloride or ethylene bia / tria / 2-cyanoethyl / phosphonium bromide are used as quaternary phephonic compounds.