JPH0619053B2 - 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 (red).

2. Description of the Related Art Conventionally, dyeing of a mixed fabric of polyester fiber and cellulose fiber (hereinafter referred to as “P / C fiber”) uses a disperse dye for the polyester fiber, and a reactive dye, a slene dye or a sulfur dye for the cellulose fiber. It was carried out using. 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 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, when continuous dyeing is performed by a padding or printing method using a conventionally proposed reactive disperse dye, generally, 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, X represents a halogen atom, R ¹ represents an ethylene group or a propylene group, and R ² represents a lower alkyl group), and the fixing temperature at the time of dyeing is 210 ° C. or more. However, if the temperature is as low as 200 ° C., there are disadvantages that the dyeing property 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] (Wherein, X represents a halogen atom, R ¹ represents an ethylene group or a propylene group, and R ² represents a lower alkyl group), and the reactive disperse dye represented by the following general formula [B] (Wherein, X represents a halogen atom, and R ³ represents a lower alkyl group or a lower alkoxyalkyl group), and this can be solved by using a dye mixture containing a disperse dye.

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 70% by weight, preferably 20 to 6% by weight with respect to the reactive disperse dye [A].
It is preferably in the range of 0% by weight. If the amount of the disperse dye represented by the general formula [B] shown above is too large or too small, the effects expected in the present invention will not be sufficiently exhibited, which is not preferable.

In the general formula [A], the substitution position of the halogen atom represented by X includes the 4,6 position and the 5,6 position. The reactive disperse dye represented by the general formula [A] is
These may be a mixture of those having different halogen atom substitution positions.

In the general formulas [A] and [B] shown above, examples of the lower alkyl group represented by R ² and R ³ include C _{1 to} C ₄ alkyl groups, and the lower alkoxyalkyl group represented by R ³ Is a C ₁ -C ₄ alkyl group substituted with a C ₁ -C ₄ lower alkoxy group, and specific examples thereof include an ethoxyethyl group, a butoxyethyl group, and a methoxypropyl group. Also, X
The halogen atom represented by is usually a chlorine atom or a bromine atom.

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 these respective 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% by weight, preferably 5-12% by weight, reaction catalyst 0.5-2% by weight, preferably 0.8-1.5% by weight
Is. 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.

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
It is 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.

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 ℃ × 60 seconds ↓ Alkali treatment Sodium hydroxide 10g / 1 dip−
nip Squeezing rate 100% 103 ° C × 30 seconds Steam treatment Washing Sodium carbonate 2g / Nonionic surfactant (trade name Diaserver SC-CT40, manufactured by Mitsubishi Kasei Co., Ltd.) 5g / 80 ° C × 10 minutes Washing ↓ Drying 100 ° C × 120 sec −1 Dyeing property 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 measured. Was set as 100 (standard), and the relative numerical value was calculated.

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

-3 Same color property evaluation Regarding the polyester / cotton (60/40) interwoven 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 Uniform dyeability evaluation For polyester / cotton (65/35) blended fabric, dyeing uniformity (streak spots, etc.) 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 Example 1 Using the dye mixture obtained by blending the dyes of the above structural formulas [a] and [b] in the proportions shown in Table 1, the above dye dispersion liquid and padding bath were adjusted, and 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 (65/3
5) Using a blended fabric (Example 3), and using the same blended fabric in Comparative Example 1 (Comparative Examples 2 to 3), a padding dyeing test was conducted under the fixing conditions shown in Table 2 to show dyeing property and levelness. When the dyeability was determined, 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 P / C fibers in one bath.

Claims (2)

[Claims] 1. The following general formula [A] (Wherein, X represents a halogen atom, R ¹ represents an ethylene group or a propylene group, and R ² represents a lower alkyl group), and the reactive disperse dye represented by the following general formula [B] (In the formula, X has the same meaning as described above, and R ³ represents a lower alkyl group or a lower alkoxyalkyl group.) A dye mixture comprising 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. 1
The dye mixture according to the item.