JPS6050914B2 - Method for improving chlorine fastness of dyed cotton textile products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for enhancing the chlorine fastness of cotton textiles dyed with reactive dyes.

The amount of reactive dyes used has steadily increased in recent years due to their vivid hues and good wet fastness.

However, this reactive dye has the disadvantage of poor chlorine fastness. That is, in cotton fiber products dyed with reactive dyes, the dyes are often oxidized by the action of trace amounts of active chlorine in tap water, resulting in fading or discoloration. In order to eliminate this drawback, conventional methods have been used to treat textile products with resins and substances that have an antioxidant effect (Japanese Unexamined Patent Publication No.
-5369, 50-5837, 50-5837 class, and 50-58395) and a method of treating fibers with a polymer made by condensing polyethylene polyamine and epihalohydrin (Japanese Patent Application Laid-Open No. 55-152879, 55-15288
No. 0 and No. 55-15288 have been proposed, but the former requires high heat treatment and is unfavorable from an energy saving perspective, although the effect is persistent, and the latter is disadvantageous in that the sustainability of the effect itself is weak. In order to solve the above-mentioned problems, the present inventors focused on various antioxidants,
After conducting research, we found that at least the following two points are necessary to improve chlorine fastness. 1. The redox potential of the compound for improving chlorine fastness is lower than the potential of the reactive dye, and the rate of oxidation of the compound is faster than that of the reactive dye.

F2: The amount of the compound adsorbed to the fibers is large and does not easily fall off from the fibers during the soaping process, etc.

Compounds that satisfy condition 1 include resorcinol, hydroquinone, gallic acid, pyrogallol, pentad tannin,
Examples include polyhydric phenols such as cod tannin and gallic tannin, but these do not satisfy the second condition.

Therefore, in order to obtain the second condition, an attempt was made to bond the fibers and the above-mentioned polyhydric phenols using a cationic compound.

However, it has been found that some of these cationic compounds act as oxidizing agents for reactive dyes, and that they may be undesirable because they cancel out the properties of tannins and the like that satisfy condition 1. Based on the above knowledge, the present inventors conducted further research and completed the present invention.

The present invention involves treating cotton fiber products dyed with a reactive dye with an alkylamine having a stronger reducing power than the dye, followed by treatment with a hydrolyzable tannin, and then treatment with a metal salt (so-called three-bath treatment). The present invention relates to a method for enhancing the fastness of the textile product.

The cotton fiber products in the present invention include yarns, knitted fabrics, non-woven fabrics, etc., or blends of cotton fibers with other fibers, blended fibers, mixed knitted fabrics, etc.

An alkylamine has a stronger reducing power than a dye because (1) the oxidation rate of the compound itself is faster than that of the dye, and (2) the redox potential of the compound is lower or higher than that of the dye. also means the degree to which the effect of treatment with hydrolyzable tannins is not negated.

The alkylamine binds the hydrolyzable tannin to the dyed product, and can be arbitrarily selected from alkyl primary to tertiary amines and alkylpropylene diamine compounds. Specific examples of such compounds include -NHCH2CH2CF[2NH2 (Z is a saturated or unsaturated higher alkyl group, such as a higher alkyl group contained in beef tallow, coconut oil, and soybean oil).

Hydrolyzable tannins have the effect of preventing the reactive dyes themselves from being oxidized by undergoing acid oxidation before the reactive dyes, and specifically include fivefold tannins, cod tannins, and gallic tannins. etc.

Note that resorcinol, hydroquinone, etc. have the same antioxidant effect as hydrolyzed tannins, but because they have poor binding strength with alkylamines, they can hardly be bound to dyed materials, and they do not improve chlorine fastness. It doesn't lead to. The metal salt forms a salt that is sparingly soluble in water with the hydrolyzed tannin, and is used to fix the hydrolyzed tannin on the fiber. Specifically, tartarite, antimony chloride, sodium antimony tartrate, stannous chloride, stannic chloride, aluminum chloride, aluminum sulfate, ferrous sulfate, ferric sulfate, zinc chloride, copper sulfate, etc. However, tartarite, sodium antimony tartrate, aluminum chloride, etc. are preferred. If metal salts are not used, hydrolyzed tannins will fall off during the soaping process or repeated washing, reducing the effectiveness, so their use is essential in products that require sustained chlorine fastness. Next, a method for treating textile products will be explained. Treatment conditions vary somewhat depending on the type of reactive dye, dye concentration, etc., but the method of treating textile products with an alkylamine involves adding an acid compound to the fiber in an amount of 0.3% to 10% (preferably 0.5 to 10%). 5%), treatment temperature 1 to 80°C (preferably 5 to 60'C), treatment time 5 to 30 minutes, pH 2 to 6.
, the bath ratio is 1:5 to 1:100.Next, the method of treating with hydrolyzable tannin can be carried out by treating the textile product with an alkylamine and then performing the treatment under the same conditions as the above treatment conditions. .

The metal salt treatment conditions are 0.1 to 5 of the hydrolyzable tannin.
Double the amount of metal salt, preferably 0.25 to 0.5 times, is used, but otherwise the process is the same as described above.

According to the present invention, it is possible to achieve a dramatic increase in chlorine fastness and sustainability that cannot be obtained with conventional methods, and furthermore, the bath can be treated at room temperature regardless of summer or winter without heating or cooling. It is extremely useful for energy saving.

In addition, the advantages of fibers dyed with reactive dyes, such as sharpness of color and good wet fastness, are not impaired, and the fastness to acid hydrolysis is improved. Examples are shown below to explain the present invention in more detail.

Example 1 Cotton gear dyed with 4% (0.w.f.) of the following reactive dye was treated with 1% (0.w.f.) of oleylamine.
), bath ratio 1:50. PH5. After soaking for 20 minutes at a temperature of 5°C and washing with water, a treatment amount of 1% (0.
w. f. ), the two powders were immersed at a bath ratio of 1:50, pH 4, and temperature of 5°C, and then washed with water.

Next, the tartarite was immersed for 2 minutes at a treatment amount of 0.5% (0.w.f.), a bath ratio of 1:50, and a temperature of 5°C, washed with water, and then air-dried. The hue of the treated fabric was almost the same as that of the untreated fabric. The dyes used were 1. C. I. Lever Fixes Navy Blue E-translated by Manufacturer, Lever Fixes Golden Yellow E-G1 manufactured by Nippon Kayaku Mikasion Prilliant Blue RSl Sand Drimalen Brilliant Red K-.
It is 4BL.

Examples 2 to 9 were carried out in the same manner as in this example by changing the processing agent and processing conditions (shown in Table 1).

Reference Example 1 Same reactive dye as Example 1 4% (0.w.f.
．． ) was immersed in oleylamine at a treatment amount of 2% (0.wf.) at a bath ratio of 1:501 at a temperature of 25° C. for 20 minutes, washed with water, and then air-dried.

Reference Example 2 Cotton gear dyed with 4% (0.w.f.) of the same reactive dye as in Example 1 was treated with octadimethylamine at a treatment amount of 2% (0.w.f.) and a bath ratio of 1. :50, and the two powders were immersed at a temperature of 30'C, washed with water, and then air-dried.

Reference Example 3 Same reactive dye as Example 1 4% (0.w.f.
．． ) was immersed in five-fold tannin at a treatment amount of 2% (0.wf.) at a bath ratio of 1:50 and a temperature of 30°C for 20 minutes, followed by washing with water.

Next, the tartarite was immersed for 2 minutes at a treatment amount of 0.5% (0.w.f.) at a bath ratio of 1:501 and a temperature of 30°C, and then washed with water.
Air dried. Example 10 Regarding the treated fabrics obtained in Examples 1 to 9 and Reference Examples 1 to 3,
The following color fastness test was conducted.

Chlorine fastness test (1) Available chlorine 50p. p. m. The test piece was immersed in a pH 8 buffer containing 1:100, stirred at 25°C for 12 hours, washed with water, and dried.

Judgment of discoloration and fading of the test piece was based on JIS No. 0801-10. The results are shown in Tables 2 to 5.

Chlorine fastness test (2) Commercially available detergent containing oxygen bleach (product name: Kao Poppins)
The test piece was immersed in a solution of 3f/L at a bath ratio of 1:100, and
After stirring the powder at 0° C. and washing with water six times, a chlorine fastness test (1) was conducted.

The results are shown in Tables 2 to 5. Acid hydrolysis test A test piece and attached white cloth (cotton) were immersed in a solution containing 10 g/L of lactic acid at a bath ratio of 1:100, stirred at 60°C, washed with water, and dried.

The contamination of the attached white cloth in this test was determined according to JIS No. 0801-10. The results are shown in Tables 2 to 5.

As is clear from the results, although tannins have excellent antioxidant effects, tannin-tartar treatment alone does not improve chlorine fastness compared to untreated fabrics.

In addition, when treated with oleylamine and octadecyldimethylamine alone, acid hydrolysis resistance was observed, but
The improvement in chlorine fastness is modest. On the other hand, according to the method of the present invention, the chlorine fastness is significantly improved and its sustainability is observed.

Claims (1)

[Claims] 1. A cotton fiber product dyed with a reactive dye is treated with an alkylamine having a stronger reducing power than the dye, then treated with a hydrolyzable tannin, and then treated with a metal salt. A method for enhancing the chlorine fastness of the textile product. 2. The method of claim 1, wherein the alkyl amine is an alkyl primary amine, an alkyl secondary amine, an alkyl tertiary amine, or an alkylpropylene diamine. 3. The method according to claim 2, wherein the alkyl is an alkyl derived from a fatty acid composition of beef tallow, coconut oil, or soybean oil. 4. The method according to claim 1, wherein the hydrolyzable tannin is a pentad tannin, a cod tannin or a gallic tannin. 5. The method according to claim 1, wherein the metal salt is an antimony salt or an aluminum salt.