JPH0619052B2 - Dye mixture - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a dye mixture, and in particular, in dyeing a polyester / cellulose mixed fiber, the fixing temperature can be lowered and the friction fastness is improved. The present invention relates to a dye mixture which has a good degree and can dye polyester and cellulose in the same color (navy blue color).

2. Description of the Related Art Conventionally, for dyeing a mixture of polyester fibers and cellulose fibers (hereinafter referred to as "P / C fibers"), disperse dyes are used for polyester fibers, and reactive dyes, slene dyes or sulfur dyes are used for cellulose fibers. As a problem in this case, since it is dyed with two kinds of dyes, color matching is very difficult, and dyeing reproducibility is lacking.

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

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, generally, since the dyeing property is poor, the fixing temperature during dyeing is low. It was necessary to increase the color density, and there were many problems in terms of fastness and levelness.

For example, the following general formula [A] The reactive disperse dye represented by the formula (wherein R ¹ represents a methyl group or an ethyl group) may have, for example, a fixing temperature of 210 ° C. or more at the time of dyeing. There are disadvantages that the adherence is deteriorated and the friction fastness is also lowered. 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 perform continuous dyeing of P / C fibers using a reactive disperse dye represented by the general formula [A] shown above, for example, 20
Good dyeing is possible even at a fixing temperature of 0 ° C, and moreover,
The present invention provides a dye mixture which 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] (In the formula, R ¹ represents a methyl group or an ethyl group), the reactive disperse dye represented by the following general formulas [B] and [C] (Wherein R ² has the same meaning as R ¹ , R ³ represents a lower alkyl group or a lower alkoxyalkyl group, and X represents a halogen atom), and a dye mixture prepared by blending a disperse dye represented by It can be solved by

Hereinafter, the present invention will be described in detail.

In the dye mixture of the present invention, the compounding ratio of the disperse dye represented by the general formula [B] shown above is usually 10 to 20% by weight based on the reactive disperse dye [A], and the general formula shown above is also used. The proportion of the disperse dye represented by [C] is usually 10 to 30% by weight based on the reactive disperse dye [A]. When the amount of the disperse dye represented by the general formula [B] or [C] shown above is too large,
If the amount is too small, the effect expected in the present invention cannot be sufficiently exhibited, which is not preferable.

In the general formula [B] shown above, examples of the lower alkyl group represented by R ³ include C _{1 to} C ₄ alkyl groups,
Examples of the lower alkoxyalkyl group include C ₁ -C ₄ alkyl groups substituted with a C ₁ -C ₄ lower alkoxy group, and specific examples include, for example, ethoxyethyl group, butoxyethyl group, methoxypropyl group. Groups and the like. The halogen atom represented by X is usually
It is a chlorine atom or a bromine atom.

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 them may be used in combination.

When dyeing P / C fibers using the dye mixture of the present invention, the dye mixture is usually made into a product, and then a nonionic surfactant and a reaction catalyst (reactive disperse dye monochlorotriazinyl) are used. For reacting the base with the OH group of the cellulose fiber), water and, if necessary, a sizing agent to prepare a dye composition. The mixing ratio of each of these components is, for example, 0.5 to 30% by weight of the dye mixture of the present invention,
Preferably 2.5 to 20% by weight, nonionic surfactant 3
-20 wt%, preferably 5-12 wt%, reaction catalyst 0.5-2 wt%, preferably 0.8-1.5 wt%. The pH of this dye composition is usually 6.5.
It is adjusted 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,
General formula (In the formula, R ³ represents a C ₁ -C ₄ alkyl group, and n is 6
To 30 and preferably 7 to 10) are particularly preferable, and as the reaction catalyst, for example, formic acid, acetic acid, benzoic acid, phthalic acid, lactic acid, oxalic acid, succinic acid, tartaric acid, The sodium, potassium or ammonium salts of organic or inorganic acids such as citric acid, phosphoric acid or carbamic acid are preferred.

In addition, in the dye composition, usually within the range of 15% by weight or less, for example, a known penetrating / wetting agent, hydrotrope agent,
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 its operating procedure may be a known method.For example, in the case of padding, a pad bath adjusting step, a padding step or a padding step is usually used. The coating process is performed in the order of a ding process, a squeezing process, a drying process, a fixing process, a washing process, a water washing process, and a drying process. In the present invention, since the temperature sensitivity of the dye component is improved, the temperature in the fixing step is set to 200 ° C.
Even if it is low, good dyeing can be performed.

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 an aqueous alkaline solution such as 0.2 to 2% by weight of caustic alkali or alkali carbonate and padding it, and then at 100 to 230 ° C. It is carried out by steaming or baking at temperature.

Furthermore, 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 dispersant on the dyeing product. It is possible because it is possible. That is, in the present invention, containing a disperse dye for polyester fibers,
A part of them stains and dyes cellulose fibers as well, so if you do not remove the disperse dye that stains and dyes cellulose fibers, the washing fastness and dry cleaning fastness may deteriorate. If such a cleaning process is adopted, such a worry can be easily 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.

Dye component 15g Padding bath composition Padding dyeing test The above dye composition was prepared to be a pad bath, and as a dyeing cloth, polyester / cotton (60/40) interwoven cloth (warp yarn: polyester, weft yarn: cotton) and polyester / cotton (65/3)
5) Continuous dyeing was performed under the following conditions using a blended fabric.

Padding 1 dip-nip squeezing rate 65% ↓ Drying 100 ℃ × 120 seconds ↓ Fixing treatment y ° C × 60 seconds ↓ Alkali treatment Sodium hydroxide 10g / 1 dip-nip squeezing rate 100% ↓ 103 ℃ × 30 seconds Steam treatment Washing Sodium carbonate 2 g / nonionic surfactant (Mitsubishi Kasei KK Seiko Co., Ltd., trademark Diaserver SC-CT40) 5 g / 80 ° C. × 10 minutes Washing with water ↓ Drying 100 ° C. × 120 seconds −1 Dyeing property evaluation The surface reflectance of the obtained dyed cloth was measured by a color difference meter (manufactured by Nippon Denshoku Industries Co., Ltd.), and the relative value was set with the surface reflectance of the dyed cloth obtained in Example 3 being 100 (standard). Was calculated.

-2 Fastness to rubbing Wet fastness to rubbing was measured by the method of JIS-L849.

-3 Same color evaluation For polyester / cotton (60/40) woven fabric, the hue difference between polyester and cotton was visually judged. (The larger the difference in hue, the poorer the same color) Same color ◎ ○ △ × Very excellent Excellent Somewhat inferior -4 Dye uniformity Evaluation of dyeing uniformity (streaks etc.) for polyester / cotton (65/35) blended spinning It was evaluated by making a relative comparison with the dyed cloth obtained in the comparative example.

Level dyeability ◎ ○ △ × Very excellent Excellent slightly inferior Inferior Examples 1-2 and Comparative Examples 1-2 Using the dye mixture obtained by blending the dyes of the above structural weaves [a] to [d] in the proportions shown in Table 1, the above dye dispersion and padding bath were prepared, and polyester / cotton (6
The padding dyeing test (fixing temperature 210 ° C.) was performed using a 0/40) woven cloth. 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 3-4 In Example 1, a polyester / cotton (65/35) blended fabric was used (Example 3), and in Comparative Example 1 a similar blended fabric was used (Comparative Example 3), and further comparisons were made. When the same blended fabric as in Example 2 was used (Comparative Example 4), a padding dyeing test was conducted under the fixing conditions shown in Table 2 to determine the dyeing properties and levelness, and the results shown in the second vote were obtained. Was given.

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 P / C fibers in one bath.

Claims (2)

[Claims] 1. The following general formula [A] (In the formula, R ¹ represents a methyl group or an ethyl group), the reactive disperse dye represented by the following general formulas [B] and [C] (In the formula, R ² has the same meaning as R ¹ , R ³ represents a lower alkyl group or a lower alkoxyalkyl group, and X represents a halogen atom.) A dye mixture prepared by blending a disperse dye. 2. The proportion of the disperse dye represented by the general formula [B] shown above is 10 to 20% by weight based on the reactive disperse dye represented by the general formula [A] shown above. [C]
The compounding ratio of the disperse dye represented by
The dye mixture according to claim 1, which is 10 to 30% by weight based on the reactive disperse dye represented by the formula (1).