JPS584885A - Composition and method for improving the fastness of dyed products - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composition for improving the color fastness of cotton textiles dyed with reactive dyes and a method for once improving the color fastness of said fibers.

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

Reactive dyes have the disadvantage that their fastness to acid hydrolysis decreases over time. After dyeing, a strong covalent bond 75 between the fiber and the reactive dye is formed due to the influence of acid, etc.; this is due to water decomposition and the dye falling off. Conventionally, this has been treated with a cationic polymer-based fixing agent after dyeing, which has suppressed the effect of strength and bending.

However, the most serious drawback of reactive dyes is their poor chlorine fastness. That is, in cotton fiber products dyed with reactive dyes, the dyes are oxidized by the action of trace amounts of active chlorine in tap water, and the colors often fade or change.

In the treatment with the above-mentioned fixing agent, the chlorine fastness is not improved, and in fact, in most cases, it is significantly lower than that without treatment.

In order to solve the problem of chlorine fastness, conventional methods have been proposed in which textile products are treated with resins and substances that have an antioxidant effect (JP-A-50-53693, JP-A-50-58373, JP-A-50-5).
8374, 50-4'8395), etc., but they require high heat treatment and are not preferable from an energy saving perspective.

In order to solve the above-mentioned problems, the present inventors focused on various antioxidants and conducted research, and found that at least the following two points are necessary to improve chlorine fastness. I found it.

(2) The redox potential of the compound that increases 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.

■The amount of nuclear compound adsorbed to the fibers is small, and it does not easily fall off from the fibers during the looping process.

Compounds that satisfy the condition (2) include polyhydric phenols such as resorcinol, hydroquinone, gallic acid, pyrogallol, pentad tannin, cod tannin, and gallic tannin, but these do not satisfy the condition (2). Therefore, in order to obtain the condition (2), an attempt was made to bond the fibers and the above-mentioned polyhydric phenols using a cationic polymer adhesive.

As a result, it was found that resorcinol, hydroquinone, etc. could hardly be bound to the dyed material, whereas hydrolyzable tannins such as pentad tannin, cod tannin, and gallic tannin could be bound well.

Based on the above knowledge, the present inventors conducted further research and completed the present invention.

In the present invention, in addition to improving acid hydrolytic fastness using a cationic polymer-based fixing agent as in the past, the fixing agent fixes hydrolyzable tannins to the dyed material, thereby successfully improving chlorine fastness. .

One aspect of the present invention is a composition for improving the color fastness of cotton textile products dyed with reactive dyes, which is a mixture of a cationic polymeric fixing agent and a hydrolyzable tannin.

Another aspect of the present invention is a method for improving color fastness, which involves using a hydrolyzable tannin in combination when treating a cotton fiber product dyed with a reactive dye with a cationic polymer fixing agent.

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

The cationic polymer-based fixing agent (polyamine-based, dicyandiamide-based, etc.) used in the present invention does not have a reactive group that can react with covalent bonds, and is able to bind fibers or It binds to dyes to improve fastness to acid hydrolysis and has the effect of fixing hydrolyzable tannins to dyed materials.

Specifically, they include polyamine-dicyandiamide reaction products, polyamine-dicyandiamide-urea reaction products, guanidines-formalin reaction products, dicyandiamide-urea-formalin reaction products, polyamine sulfones, and nitrile polymers. Many of these are commercially available and can be used as is.

Among these fixing agents, particularly desirable ones are fixing agents whose reducing power is stronger than that of dyes. The stronger the reducing power, the stronger the effect of improving chlorine fastness by hydrolyzed tannins. Strong reducing power means that the fixing agent itself is oxidized at a high rate and its redox potential is low. However, even when a fixing agent with a weak reducing power is used in combination with a hydrolyzable tannin, the chlorine fastness is greatly improved compared to when the fixing agent is used alone.

Hydrolyzable tannins include fivefold tannin, cod tannin, gallic tannin, and the like, which have the effect of preventing the reactive dye itself from being oxidized by being oxidized before the reactive dye.

A composition formed by mixing a cationic polymer-based adhesive and a hydrolyzable tannin is usually prepared by dissolving the cationic polymer-based adhesive in water with acidity to form an aqueous solution of the salt of the adhesive.
On the other hand, a hydrolyzed tannin may be dissolved in water to form an aqueous tannin solution, and both may be uniformly mixed. The mixing ratio is not particularly limited, but the amount of hydrolyzable tannin mixed in the composition is 0.1 to 1% o, w, f, based on the cotton fiber product.
You just need to mix it with the fixing agent so that it becomes .

When treating cotton fiber products using the composition of the present invention, the treatment conditions vary somewhat depending on the type of reactive dye, dyeing concentration, etc.
Preferably 0.5 to 4 thio, w, f, bath ratio 1:10 to
Use at 1:30. The treatment temperature is 5 to 80°C, the treatment time is 10 to 30 minutes, and the treatment pH is 2 to 6.

In addition, if hydrolyzable tannins are used in conjunction with treatment with a cationic polymer-based binding agent, the cotton fiber product must first be treated with the cationic polymer-based adhesive and then treated with hydrolyzable tannins, or Simultaneously treated with a polymeric fixing agent and hydrolyzable tannin. The processing conditions are substantially the same as those when using the composition.

It is desirable to further treat the dyed product obtained as described above with a metal salt. Hydrolyzable tannins are firmly fixed in the dyed material by the metal salt treatment, and can be prevented from falling off during the soaping process or repeated washing, thereby reducing its effectiveness. Metal salt treatment is not necessary for products where long-term chlorine fastness is not an issue.

Metal salts include tartarite, antimony chloride, sodium antimony tartrate, stannous chloride, stannic chloride, aluminum chloride, aluminum sulfate, ferrous sulfate, ferric sulfate, zinc chloride, copper sulfate, etc. Among them, tartarite, sodium antimony tartrate, aluminum chloride, etc. are preferred.

The treatment conditions with metal salts are 0, 1 of hydrolyzed tannin.
~0.5 times the amount of metal salt, preferably 0.25 to 0.5 times the amount of metal salt is used, but otherwise the same as the other treatments described above.

According to the present invention, it is possible to achieve a dramatic improvement in chlorine fastness, which cannot be obtained with conventional cationic polymer-based fixing agents alone. In addition, no adverse effects on hue, wet fastness, and acid hydrolytic fastness due to the use of hydrolyzable tannins were observed. In order to explain the present invention in more detail, Examples are shown below.

Example 1 10 parts of polyamine adhesive Sanfix 555 (manufactured by Sanyo Chemical Co., Ltd.), 58 parts of 50 thiacetic acid and 3 parts of ethylene glycol
0 parts, 2 parts of cod tannin was added thereto, and stirred and dissolved to obtain 100 parts of a composition.

Example 2 10 parts of the polyamine-based fixing agent Supra Fixtures DFC (manufactured by Nippon Senka Co., Ltd.) was dissolved in 58 parts of 50% acetic acid and 30 parts of ethylene glycol. 2 parts of five-fold tannin was added and dissolved with stirring to obtain 100 parts of a composition. The composition dissolved clearly in water.

Example 3 Cotton gannoku dyed with 4% (o, w, f,) of the reactive dye Mikasion Brilliant File-R8 (manufactured by Nippon Kayaku) was dyed with 20% (o, w, f,) of the composition obtained in Example 1. ,w,f
,) in a treatment bath containing: bath ratio l:50, pH 5, temperature 40
'C for 20 minutes, washed with water and air-dried.

Example 4 Except for using the composition obtained in Example 2, the same treatment as in Example 3 was carried out, followed by washing with water and air drying.

Example 5 Reactive dye Mikasion Brilliant Pur-R54% (
Cotton gyano (oow, f,) was dyed with polyamine fixative Sanfix 555 and tartannin at 2 parts (o, w, f,) and 0.4 parts (olw, f,), respectively.
In the treatment bath containing: bath ratio 1:50, pH 5, temperature 40°C
The sample was soaked in water for 20 minutes, washed with water, and air-dried.

Reference example 1 Reactive dye Mikasion Brilliant Blue-R54% (
Cotton gyanoku dyed with 0, w, f, ) was placed in a treatment bath containing 2% (oow, f,) of the polyamine fixative Sunfix 555 at a bath ratio of 1:50. It was subjected to immersion treatment at pH 5 and temperature of 40°C for 20 minutes, washed with water, and then air-dried.

Reference example 2 Polyamine-based adhesive Supra Inox D as adhesive
The treatment was carried out in the same manner as in Reference Example 1 except that FC was used, and the sample was washed with water and air-dried.

Reference Example 3 The same process as in Reference Example 1 was carried out except that five-fold tannin was used as a fixing agent, and the sample was washed with water and then air-dried.

Examples 6 to 8 and Reference Examples 4 to 6 Cotton GABA dyed with reactive dye Cibacron Navy FG (manufactured by Ciba Geigy) 3% (oow, f, ) was used in Examples 3 to 5 and Reference Examples 1 to 6, respectively. It was subjected to the same treatment as in No. 3, washed with water, and then air-dried.

Example 9 The following color fastness test was conducted on the treated cotton gabarries obtained in Examples 3 to 8 and Reference Examples 1 to 6. The results are shown in the table below.

Chlorine Fastness Test A test piece was immersed in a pH 8 buffer containing soppm of available chlorine at a bath ratio of 1:100, stirred at 25°C for 2 hours, washed with water, and dried. Judgment of discoloration and fading of test piece is based on JIS-L-0
According to 801-10.

Acid hydrolysis fastness test The test piece and attached white cloth (cotton) were immersed in an aqueous solution of lactic acid 10 y/l at a bath ratio of 1:100, stirred at 60°C for 20 minutes, washed with water, and dried. The contamination of the attached white cloth in this test was determined according to J15-L-0801, 10.

Washing fastness test was conducted according to JIS-L-1045A No. 2. Judgment of discoloration and fading of the test piece and judgment of contamination of the attached white cloth shall be made in accordance with J15.
- According to 10 of L-0801.

Sweat (alkali) fastness test JIS-L-0847A-1 was followed. Contamination of the attached white cloth was determined according to JIS-L-0801 10.

As is clear from the results, the chlorine fastness of the fabric treated with the composition and method of the present invention is significantly improved compared to both the fabric treated with only a fixing agent or only hydrolyzable tannin, and the untreated fabric. has been done.

In addition, when treated with only a fixing agent, there is a tendency for it to be lower than when untreated, and when treated only with hydrolyzable tannin, there is no significant improvement.

Furthermore, the acid hydrolytic fastness and wet fastness are as good as those treated with a fixing agent alone, and are equivalent or improved compared to those treated with only a hydrolyzable tannin and untreated. .

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Claims (1)

[Scope of Claims] +11 A composition used for improving the color fastness of cotton textile products dyed with a reactive dye, characterized in that it contains a cationic polymer-based fixing agent and a hydrolyzable tannin. (2) A method for improving color fastness, which comprises using a hydrolyzable tannin in combination when treating a cotton fiber product dyed with a reactive dye with a cationic polymer fixing agent.