JPS5836115B2 - Sensitive Kubutsu no Kenroudo Koujiyouhou - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for improving the light fastness of dyed textile products, and more particularly to a treatment for improving the light fastness of dyed textile products, particularly textile products made of natural or synthetic polyamides. Regarding the method.

Among the various fastness properties of dyed products, the most important are light fastness and washing fastness, and the phenomenon of light fastness in particular is extremely complex, and it is difficult to improve it.

In addition, the light fastness of dyed products is particularly problematic for light colors including white and below, rather than for medium colors and above, and among these, light fastness is more problematic for clear hues than for vague hues.
If the color is pale or lower, including white, the light fastness is extremely poor.

Conventionally, in order to obtain vivid colors and high whiteness for fibers such as wool, where the whiteness of the fiber itself is low and bleaching cannot be expected to significantly improve the whiteness, dyes that still emit fluorescence even if the light fastness is low have been used. However, due to their chemical structure and characteristics, these types of dyes are extremely sensitive to ultraviolet light.
easily influenced by it.

One way to improve light resistance in such cases is to use an ultraviolet absorber, but if a fluorescent dye and an ultraviolet absorber are used in combination, the fluorescence will cancel each other out and the sharpness will drop significantly. Since oxidizing agents cannot improve light fastness, it has been a long-held desire of dyeing engineers to improve light fastness without reducing sharpness.
Furthermore, this is an important problem that has been desired commercially for many years. The present inventors have conducted intensive research on a method for improving the light fastness of textile products, especially dyed textile products made of natural or synthetic polyamides, which do not have the above-mentioned drawbacks. As a result, the method of the present invention was achieved.

That is, the present invention improves the fastness of dyed textile products by post-treating them with specific compounds represented by formulas (I) and (If) or their salts.

The method of the present invention has the advantage that not only the light fastness is improved but also the washing fastness is improved.

Furthermore, in addition to the feature that fluorescence is not canceled out or the hue becomes unclear, the process power method is simple and can be applied in a continuous process.

The reason why the method of the present invention provides excellent light fastness is unclear, partly because the cause of photobleaching has not been elucidated. It is thought that this is to give shape to the

The compounds used in the method of the present invention may have one nitrogen atom as shown in the general formula as primary or secondary.
Compounds having a primary, secondary, or tertiary amine group, carbonamide group, or sulfonamide group as a class amino group, more specifically, ethylenediamine, hexamethylenediamine, diethylenetriamine, triethylene Tetramine, Tetraethylenepentamine, N
, N'-dimethyl-F-phenylenediamine, N,N-
Preferred compounds include dimethyl-P-phenylenediamine and P-aminebenzenesulfonamide.

As the salts of these bases, salts of volatile acids such as hydrochloric acid and acetic acid are preferred.

The concentration of these bases or their salts depends on the processing power method, but is usually 0.1 to 5% owfT.

In the treatment method of the present invention, the dyed material is usually treated with an aqueous solution of the above-mentioned base or its salts by any method such as dipping method, pad method, spray method, etc., but heating during treatment is not particularly necessary. It is convenient to immerse the material, usually at 5 to 50 DEG C., preferably around room temperature, for several seconds to several hours, or to immerse it for a short period of time, then squeeze and dry.

The method of the present invention provides good fastness when applied not only to dyed products but also to fluorescently brightened products.

Furthermore, although the method of the present invention is particularly effective when applied to natural or synthetic polyamide fibers, it is also widely applicable to dyeing textile products made of other acrylonitrile fibers, protein-acrylonitrile graft copolymer fibers, cellulose fibers, etc. Can be applied.

Furthermore, although the method of the present invention is particularly effective when applied to dyed materials using acid dyes and optical brighteners, it is not necessarily limited to these dyes.

The present invention will be explained below with reference to Examples.

In addition, the value in the examples is the weight φ.

Example 1. String-like wool thread is soaked in hydrogen peroxide solution (30%) 15CC/l1
Bleaching was carried out at 45°C for 5 hours with an aqueous solution consisting of 19/l of sodium pyrophosphate, and then Whitex WS (
Sumitomo Chemical Co., Ltd., fluorescent dye) 0.5% owf1 Sulforhodamine G (Hoechst Co., Ltd., acidic dye) 0.0 0 4
%owf1 and sulfuric acid 2%owf and Karanaro aqueous solution at 90°C for 20 minutes, washed with water, and dried.

A rib knitted fabric was knitted using the wool yarn thus obtained, and the following treatments were performed.

(1) Ethylenediamine aqueous solution pad (1% OWF) and then drying at 90°C (method of the present invention) (2) Tetraethylenepentamine aqueous solution pad (1% OWF)
%owf) and then dried at 90°C (method of the present invention) (3) Finished dyeing (no post-treatment) The light resistance of the obtained treated fabric was evaluated by irradiation with a fade-o-meter for 10 hours. The results are shown in Table 1. Ta.

As a result, the method of the present invention almost eliminated dullness of hue and improved light resistance.

Example 2. Protein-acryloni I-IJ copolymer fiber (manufactured by Toyobo Co., Ltd., registered trademark Shinon) was bleached with an aqueous solution of 3 g/l of thiourea dioxide, and then sulforhodamine GO. 00
It was dyed at 90° C. for 60 minutes with an aqueous solution consisting of 3% owf1 Blancophore CL (manufactured by Bayer AG, fluorescent dye) 1 ○wf and 2% owf acetic acid, washed with water, and dried.

The fluorescent whitening fiber thus obtained was immersed in the following treatment solution at room temperature for 5 seconds, and then squeezed to a squeezing rate of 80φ.
It was dried at 0°C.

(1) P-amine benzenesulfonamide 1.2
% aqueous solution (method of the present invention) (2) Triethylenetetramine 1. 0% aqueous solution (method of the present invention) (3) Finished dyeing (no post-treatment) The light resistance of the obtained treated cloth was evaluated by irradiation with a fade-o-meter for 10 hours. The results are shown in Table 2.

As a result, by the method of the present invention, the dull hue was almost eliminated and good light resistance was obtained.

In addition, the washing fastness was also very good.

Example 3. A dyed cloth dyed in the same manner as in Example 1 was padded with various polyamine compounds shown in Table 3 (1% owf) and dried at 90°C, and the light resistance of the resulting treated cloth was evaluated. .

Claims (1)

[Claims] 1 The dyed textile product is expressed by the following general formula CI), (If
) and their salts. A method for improving the fastness of dyed products O