JPS6346263A - Production of colorant for fibrous material - Google Patents

Abstract

PURPOSE:To obtain the titled novel colorant having extremely high fastness to wetting and extremely improved fastness to washing and wearing simply and at low cost, by adding a fixing agent to a dye solution to agglomerate the dye, collecting the dye and subjecting the dye to dispersion treatment under a specific condition. CONSTITUTION:A solution of direct dye, acid dye or reactive dye is blended with a fixing agent to agglomerate the due, which is collected and subjected to dispersion treatment by the use of an anionic surface active agent at 70-80 deg.C for about 30min to give the aimed colorant. Preferably anionic dye is blended with cationic dye as a fixing agent, agglomerated, the agglomerated dye is collected and subjected to dispersion treatment by the use of an anionic surface active agent at 70-80 deg.C for <=1hr to give the aimed colorant.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the invention of a method for producing a coloring agent for textile materials, and provides a novel coloring agent which has extremely high wet fastness for woven fabrics and other textile materials, and which has extremely excellent color fastness to rubbing. The aim is to establish a method that can produce materials relatively easily and at low cost.

It is generally known that dyes and pigments exist as colorants for woven fabrics and other textile products, and each is widely used, but these conventional dyes and pigments have their own disadvantages and drawbacks. It is clear that the dye itself is hard, and even if fixing agents added after dyeing and other post-treatments are devised, the color generally fades due to sunlight or aging. Although various fixatives have been developed for pigments, peeling off of pigment particles due to friction during washing or other wet or dry conditions is unavoidable, and therefore, pigment particles cannot be used for clothing or other purposes. In either case, it is not possible to maintain the beautiful color of the colored head for a long period of time.

In view of the above-mentioned circumstances, the present inventor has repeatedly considered and decided to submit Patent Application No. 38228 of 1971 (Special Publication No.
No. 80 No. 2 hereinafter referred to as the Prior Invention), and although it uses dye as a raw material, it has high fastness to sunlight and shows a non-fading property equivalent to or better than that of pigments, and also has fastness to washing and other abrasion. We have succeeded in developing a new coloring agent that has a large amount of color and can maintain an extremely stable colored state over a long period of time. That is, in this prior invention, a dye is added to hot water heated to an appropriate temperature, stirred, and dissolved. An appropriate amount of a fixing agent is added and mixed to form a sparingly soluble agglomerated dye. The flocculated dye is precipitated and fractionated, washed with warm water as appropriate, and the flocculated dye thus obtained is then transferred to an autoclave, where the flocculated dye is subjected to a finer treatment under the required heating conditions to sufficiently disperse and soften it. However, this dispersion treatment uses a cationic fixing agent, etc., and requires a large amount of dispersant to make the dispersion fine, requires relatively high temperatures, and takes 1 to 5 hours for the treatment time. Since this method requires approximately 100,000 hours, it has the disadvantage of considerably increasing costs.

The present invention was developed after further study to avoid such disadvantages, and by using an anionic surfactant in the dispersion treatment as described above, the required amount and temperature of the dispersant can be adjusted. Reducing both the conditions and the required time,
We succeeded in obtaining the desired coloring agent simply and at low cost.

That is, to further explain the present invention, the dye to be applied may be any of direct dyes, acid dyes, and reactive dyes. Dyes that yield particularly favorable results include sulfonic groups (S(hH) and sulfonic acid sodium salts (SO
It is a dye having two or more of Ja). As a fixing agent to be added to such a dye to cause aggregation, formalin-based, polyamine-based, dicyandiamide-based condensates, or any other known fixing agent may be used. cationic dyes may be used instead of anionic dyes. The agglomerated and precipitated substances with this fixing agent are filtered and then dispersed. During the dispersion treatment, an anionic surfactant is used. Specifically, naphthalene sulfonic acid formaldehyde condensate and naphthalene sulfonic acid formalin condensate are used. , naphthalene sulfonic acid soda formalin condensate, etc. are employed.

The amount of such a dispersant required for this dispersion treatment is relatively smaller than in the case of the earlier invention, and the temperature during the dispersion treatment carried out in an autoclave is 100°C or more in the earlier invention, 150°C. However, in the present invention, 7
A temperature of about 0 to 80°C is sufficient, and a treatment time of about 30 minutes is sufficient, as opposed to 1 to 5 hours in the earlier invention, and as a result, the desired coloring agent can be produced easily and at low cost. can be obtained.

The coloring agent of the present invention obtained in this way can be colored by either the dip dyeing method or the printing method by appropriately adopting a paste or the like in the same way as in the case of coloring with conventional coloring agents. It is the same as in the original invention that it is possible to achieve coloring with high fastness under sunlight, friction, and washing. Even under conditions that would cause coagulation upon contact, as in the case of mixing these, it is possible to obtain a desired coloring by being uniformly dispersed.

Specific examples of the method according to the present invention will be described below.

Example 1 Using Dial Mina Red (manufactured by Mitsubishi Kasei Corporation) as a direct dye, 20 kg of this dye was heated at 50 to 70°C.
The mixture was poured into 0ON water and thoroughly stirred to dissolve. To the dye thus dissolved, 8 kg (the amount can be increased or decreased as appropriate within the range of 5 to 20 kg) of a dicyandiamide condensate (cationic surfactant) as a fixing agent was added, and as described above. A sparingly soluble agglomerated dye was formed under a temperature condition of 50 to 70 DEG C., and this agglomerated dye was precipitated.

The jl-soluble agglomerated dye obtained in this way has a hardness of 1 degree higher than that of conventional pigments when it is directly dried, and the hardness of the agglomerated dye of the present invention is 1. This indicates that each molecule or particle has significantly higher stickiness than the pigment. Separate this,
Approximately 200 kg after washing with warm water and filtering.
A water-containing agglomerated dye of
kg is added and dispersed for 35 minutes at around 75°C to obtain a homogeneous dispersed dye that is finely divided and sufficiently softened.

However, cotton fabric is colored using the coloring agent according to the embodiment of the present invention as described above, and this is colored using a conventional pigment-based coloring agent of the same color, Nilasan Color released by Nissan Co., Ltd., and the same. A product colored by a conventional method using direct dye Dial Mina Red was prepared, and its sunlight fastness, washing fastness and rubbing fastness were compared and tested, and the results are shown in Table 1 below.

Table 1 Note 10 The judgment results indicate that the series is highly resistant to fading.

Note 2. The test method is as follows.

Fastness to sunlight: 20-hour irradiation using a Fedometer; fastness to rubbing; using a simple vibration type tester. Fastness to washing: immersed in running water containing 0.5% soap solution (50°C) for 30 minutes. This example shows fastness to sunlight. It shows the same fastness as that using conventional pigment-based colorants in terms of colorfastness, and has superior fastness to rubbing and washing compared to conventional colorants, especially in lf! Rubbing fastness (
Since actual laundry work involves a certain amount of friction, it is clear that the product has clear superiority in the washing fastness test and the wet rubbing fastness test. confirmed.

Example 2 Using reactive dye Diamirror Red, this dye 2
0 kg in Example 1. After dissolving it in water in the same manner as in [Example], 9 kg of a fixing agent of the same dicyandiamide condensate as in [Example] was gradually added and stirred. Example 1. 10 kg of naphthalene sulfonic acid formalin condensate, which is the same anionic surfactant, as water 101! Example 1. In the same manner as in the above, a fine colorant of about 0.1 to 0.003 micrometers but sufficiently softened was obtained.

However, using this coloring agent, print coloring was carried out on cotton fabric, and as a comparative example, one was colored with a pigment-based coloring agent corresponding to the coloring of the above-mentioned reactive dye according to a conventional method, and another was colored using a conventional method using the above-mentioned reactive dye. Colored fabrics were prepared, and the colored fabrics thus obtained were compared and tested for their sunlight fastness and washing fastness, and the results are shown in Table 2 below.

Note to Table 2: The method for each test is the same as shown in Table 1.

Example 3 Using Diazid Orange, an acidic dye, this dye was applied to Example 2. In the same way as above, after agglomerating with a fixing agent, 10 kg of naphthalene sulfonic acid formaldehyde condensate (anionic surfactant manufactured by Meisei Chemical Co., Ltd., trade name Disper'rt L) was diluted in 10 (l) of water. This material was dispersed in an autoclave to obtain a fine or softened colorant.The temperature conditions during this dispersion treatment were around 75°C, and the treatment time was approximately 25 minutes in the autoclave. It is.

The colorant thus obtained was used in Example 19.2. The woolen fabric was colored in the same way as in , but it was colored using a pigment-based coloring agent that produced a color tone equivalent to the above acid dye, and the above dye was colored using the conventional method using Diazid Orange. were prepared as comparative examples.

Example 1: The sunlight fastness and other properties of these items
0.2. The results of the same tests as in Example 10.2 are shown in Table 3 below, and judging by taking into account the results in Comparative Example, Example 10.2. I was able to get better results than later.

Note to Table 3: All test methods are as in Example 10.2. The same is true for .

Example 4 5 kg of a 15% solution of a cationic dye (trade name: Diacryl Red) manufactured by Mitsubishi Kasei Corporation and 5 kg of a 15% solution of an anionic dye (trade name: Diacif Dread) manufactured by Mitsubishi Kasei Corporation
18% of the same sodium naphthalene sulfonate formalin condensate as in Example 10.2 was added as an anionic surfactant to the mixture and agglomerated, followed by dispersion treatment at around 70°C for 30 minutes. A sufficiently dispersed and softened colorant was obtained.

60% acrylic fiber and 4% wool fiber using the above colorant
In addition, as a comparative example, Nirasan Color, a conventional pigment-based colorant, and the above-mentioned cationic dye and anionic dye were simply mixed according to the conventional technique, and a sedimentation inhibitor was added to the blended woven fabric using a printing method. Toho Sol) CD880 (manufactured by Toho Chemical Co., Ltd.) was used to prepare dyed products, and after soaping these products, various tests were conducted as in Example 1. ~3. The results were as shown in Table 4 below.

Table 4: 50% acrylic fibers and 5% cotton fibers using colorants according to the invention and comparative examples prepared in the same manner as above.
The following Table 5 summarizes the results of various similar tests conducted on 0% blended woven fabrics or mixed woven fabrics that were colored using a printing method and then soaped.

According to the results in Table 5, that is, the above-mentioned Tables 4 and 5, the product of the present invention is significantly improved compared to the conventional method using the same dye and an anti-settling agent. It was confirmed that a significant improvement was obtained when compared to that using pigment-based colorants.

According to the method of the present invention as explained above, it shows results that are equivalent to or better than conventional pigment-based colorants in sunlight fastness, and are superior to conventional pigment-based colorants, including conventional dye-based colorants, in washing fastness and rubbing fastness. This invention allows a new coloring agent that exhibits significantly better fastness to be obtained relatively easily and at low cost, and is an invention that has great industrial effects.

Claims (1)

[Claims] 1. A fixing agent is added to the dissolved direct dye, acid dye or reactive dye to cause agglomeration,
A method for producing a fiber material colorant, which comprises separating the aggregated dye and performing a dispersion treatment at 70 to 80°C for about 30 minutes using an anionic surfactant. 2. A fibrous material characterized by mixing an anionic dye and a cationic dye, agglomerating the mixture, separating the agglomerated dye, and performing a dispersion treatment using an anionic surfactant at 70 to 80°C for 1 hour or less. Colorant manufacturing method.