JPH0717861B2 - Dye mixture - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a dye mixture, and in particular, in dyeing mixed fibers composed of polyester / cellulose or nitrogen-containing fibers, it is possible to lower the fixing temperature. The present invention relates to a dye mixture which is capable of dyeing polyester and cellulose or nitrogen-containing fibers in the same color (blue) while having good fastness to rubbing.

Conventional technology Conventionally, dyeing of a mixed fabric of polyester fiber and cellulose fiber such as cotton (hereinafter referred to as “P / C fiber”)
Use disperse dyes for polyester fibers, and
For the cellulose fiber, the reactive dye, the slene dye, the sulfur dye or the like was used. Problems in this case are that it is very difficult to match the colors because the dyes are dyed with two kinds of dyes, and the dyeing reproducibility is lacking.

Recently, a method of dyeing P / C fibers with one dye, a reactive disperse dye, has been proposed (13th Textile Processing Symposium, November 9, 1984, sponsored by The Textile Society of Japan). According to this method
It is possible to solve color matching and dyeing reproducibility, which have been problems in conventional dyeing, and dye with various practical colors without limiting the use of dyes.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, conventionally, when continuous dyeing is performed by a padding or printing method using a reactive disperse dye that has been proposed, in general, the dyeing property is poor, and thus the fixing at the time of dyeing It was necessary to raise the temperature, and there were many problems in terms of fastness and levelness.

For example, the following general formula [A] (Wherein R ¹ represents a C _{2 to} C ₄ alkyl group), the reactive disperse dye also has, for example, a fixing temperature of 210 ° C. during dyeing.
If the temperature is as high as 200 ° C. or higher, the dyeing property is deteriorated at 200 ° C. and the fastness to rubbing is also deteriorated. Further, this reactive disperse dye also has a problem in levelness, and especially when a laminated cloth of polyester cloth and cellulose cloth is dyed, a difference in color tone between the two is conspicuous.

The present invention has been made in view of the above circumstances, and an object thereof is to continuously dye P / C fibers using a reactive disperse dye represented by the general formula [A] shown above, for example, 200 ° C. The present invention provides a dye mixture which can be dyed well even at a fixing temperature of 1, and has good fastness to rubbing and does not cause a color difference between polyester and cellulose.

Means for Solving Problems In the present invention, the above-mentioned problems in the prior art are
The following general formula [A] (Wherein R ¹ represents a C _{2 to} C ₄ alkyl group), the reactive disperse dye represented by the following general formula [B] This can be solved by using a dye mixture prepared by mixing a purple disperse dye represented by the formula (wherein R ² represents a methyl group or an ethyl group).

Hereinafter, the present invention will be described in detail.

In the dye mixture of the present invention, the proportion of the purple disperse dye represented by the general formula [B] shown above is usually 10 to 70% by weight based on the reactive disperse dye [A]. If the amount of the disperse dye represented by the general formula [B] is too large or too small, the effects expected in the present invention cannot be sufficiently exhibited, which is not preferable.

Further, in the present invention, it is more preferable to add a small amount of a known yellow disperse dye composed of a monoazo compound in addition to the above disperse dye, particularly from the viewpoint of levelness. The amount of the yellow disperse dye compounded is usually 3 to 6% by weight based on the reactive disperse dye. Specific examples of these yellow disperse dyes include pyridone-based, pyrazolone-based, or quinolone-based monoazo dyes represented by the following structural formulas, and two or more of these may be used in combination.

When dyeing P / C fibers using the dye mixture of the present invention, usually, after producing the dye mixture, a nonionic surfactant, a reaction catalyst (monofluorotriazine of a reactive disperse dye) (For reacting the nil group with the OH group of the cellulose fiber) and water, and if necessary, a sizing agent is mixed,
Prepare the dye composition. The mixing ratio of these respective components is, for example, 0.5 to 30% by weight of the dye mixture of the present invention, preferably
The amount is 2.5 to 20% by weight, the nonionic surfactant is 3 to 20% by weight, preferably 5 to 12% by weight, and the reaction catalyst is 0.5 to 2% by weight, preferably 0.8 to 1.5% by weight. The pH of the dye composition is usually adjusted to 6.5 to 8.5, preferably 6.8 to 7.5.

The nonionic surfactant and reaction catalyst used here are not particularly limited and may be those conventionally used. For example, as the nonionic surfactant,
Formula ^{_{R 3 OCH 2 CH 2 O n}} H ( wherein, R ³ represents an alkyl group of C ₁ -C _4, n is 6 to 30, preferably a 7-10) surfactant represented by the Particularly preferred as the reaction catalyst are, for example, sodium salts of organic acids or inorganic acids such as formic acid, acetic acid, benzoic acid, phthalic acid, lactic acid, oxalic acid, succinic acid, tartaric acid, citric acid, phosphoric acid or carbamic acid. , Potassium salts or ammonium salts are preferred.

Further, in the dye composition, usually, in the range of 15% by weight or less, for example, known penetrating and wetting agents, hydrotropes,
Various additives such as a migration inhibitor may be added.

The dyeing method to which the dye mixture of the present invention can be applied is usually a padding or printing method, and the operating procedure thereof may be a known method.For example, in the case of padding, a pad bath adjusting step is usually used. The padding process, the squeezing process, the drying process, the fixing process, the washing process, the water washing process, and the drying process are performed in this order. In the present invention, since the warmness of the dye component is improved, good dyeing can be performed even when the temperature in the fixing step is as low as 200 ° C.

Further, in the present invention, it is desirable to add an alkali treatment step for increasing the dyeing efficiency of the dye after the fixing step. This alkali treatment is usually carried out by immersing the dyed product after the fixing treatment in, for example, 0.2 to 2% by weight of an alkaline aqueous solution such as caustic alkali or alkali carbonate, padding it, and then at a temperature of 100 to 230 ° C. It is carried out by steaming or baking.

Further, in the present invention, in the washing step, when the dyeing product is washed in water containing a detergent, the presence of an alkali in the system effectively removes the undyed disperse dye on the dyeing product. It is possible because it is possible. That is, in the present invention, since it contains a disperse dye for polyester fibers, a part of which stains and dyes cellulose fibers as well,
If you do not remove the disperse dye that stains and stains the cellulose fibers, the wash fastness and dry cleaning fastness may deteriorate, but if you use the washing process as described above, such concerns are also easy. Can be avoided. The alkali used in this treatment is usually caustic alkali or alkali carbonate, and the concentration thereof is, for example, 0.02 to 0.5% by weight, preferably 0.1 to 0.3% by weight.

EXAMPLES Next, the present invention will be described more specifically by way of examples, but the present invention is not limited to the following examples.

The prerequisites for the tests in the examples and comparative examples are:
It is as follows.

Dye dispersion A mixture of the following composition crushed with a sand grinder at room temperature.

Composition dye dispersion padding bath _{13g CH 3 OCH 2 CH 2 O} 3 H 8g penetrant (Dia server PN-SR) 0.1 g migration inhibitor 0.1 g (Dia server MG-N) CH ₃ COONH ₄ aqueous pH7 adjusted water Total amount of remaining 100g Padding dyeing test The above dye composition organisms are adjusted to form a pad bath, and polyester / cotton (60/40) mixed woven fabric (warp: polyester, weft: cotton) and polyester / cotton (65 / 35) Continuous dyeing was performed using a blended fabric under the following conditions.

-1 Dyeability Evaluation The surface reflectance of the dyed cloth obtained above was measured by a color difference meter (manufactured by Nippon Denshoku Industries Co., Ltd.), and the surface reflectance of the dyed cloth obtained in Example 3 was 100 ( As a standard), a relative numerical value was calculated.

-2 Rubbing fastness The fastness to wet rubbing was measured by the method of JIS-L849.

-3 Same color evaluation For polyester / cotton (60/40) interwoven fabric, the difference in hue between polyester and cotton was visually evaluated. (The larger the difference in hue, the poorer the same color) Same color ◎ 〇 △ × Very excellent Excellent Somewhat inferior -4 Uniform dyeability evaluation Dyeing uniformity (streaks etc.) for polyester / cotton (65/35) blended fabric Was evaluated by making a relative comparison with the dyed cloth obtained in Comparative Example.

Level dyeability ◎ 〇 △ × Very excellent Excellent slightly inferior Inferior Examples 1-2 and Comparative Example 1 A dye mixture prepared by blending the dyes of the above structural formulas [a] to [c] in the proportions shown in Table 1 was used to prepare the above dye dispersion liquid and padding bath, and the polyester / cotton (60
/ 40) A padding dyeing test (fixing temperature of 210 ° C) was performed using a mixed woven fabric. When the same color property of polyester and cotton and the fastness to rubbing were measured, the results shown in Table 1 were obtained.

Example 3 and Comparative Examples 2-3 In the method of Example 1, polyester / cotton (65/35)
Using a blended cloth, a padding dyeing test was conducted under the fixing conditions shown in FIG. 2 to determine the pre-adhesion property and the level dyeing property.
The results shown in Table 2 were obtained.

Effects of the Invention As described in detail above, according to the present invention, by blending a specific reactive disperse dye with a specific disperse dye, friction fastness is improved, and even when the fixing temperature during dyeing is low. In addition, it shows high dyeing property, and the leveling property and the same color property at that time are also very excellent.

Therefore, the dye mixture of the present invention is industrially valuable as a dye for simultaneously dyeing mixed fibers composed of polyester and cellulose or nitrogen-containing fibers in one bath.

Claims (2)

[Claims] 1. The following general formula [A] (Wherein R ¹ represents a C _{2 to} C ₄ alkyl group), the reactive disperse dye represented by the following general formula [B] (In the formula, R ² represents a methyl group or an ethyl group) A dye mixture containing a disperse dye. 2. A compounding ratio of the disperse dye represented by the general formula [B] shown above is from 10 to 70% by weight based on the reactive disperse dye represented by the general formula [A] shown above. A dye mixture according to item 1.