JPH059401A - Disperse dye mixture - Google Patents

Abstract

PURPOSE:To improve the dyeing properties and temperature dependence of navy-blue disperse dyes while maintaining the excellent wet color fastness of the dyes to thereby improve dyeing reproducibility by blending two specific disperse dyes. CONSTITUTION:At least one disperse dye represented by formula I is blended with at least one disperse dye represented by formula II. In formula I, X represents a hydrogen atom or a halogen atom and R<1> represents a hydrogen atom, a 1-3C alkyl group, or a 1-3C alkoxyl group. In formula II, R<2> represents a 1-4C alkyl group. The blending ratio of the dye of formula I to that of formula II is generally about (10-90):(90-10) by weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disperse dye mixture, and more particularly to a navy disperse dye mixture which is excellent in temperature dependency and build-up during high temperature dyeing.

[0002]

2. Description of the Related Art Navy disperse dyes represented by the general formula [A] are known as dyes having excellent wet fastness when dyeing polyester fibers. The dyeing property was not sufficient, the build-up property was poor, and the temperature dependency was large, and there was a problem in dyeing reproducibility.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides dyeing by improving dyeability and temperature dependence while maintaining the excellent wet fastness of the navy disperse dye represented by the general formula [A] shown above. The purpose is to improve reproducibility.

[0004]

Means for Solving the Problems As a result of intensive investigations by the present inventors in view of the above-mentioned circumstances, when a dye of the general formula [A] shown above and a dye having a specific structure are used as a mixture, they can be used alone. It was found that the dyeing properties were remarkably improved in comparison. That is, the gist of the present invention lies in a disperse dye mixture obtained by mixing the disperse dye represented by the general formula [A] shown above with the disperse dye represented by the general formula [B] shown above.

The present invention will be described in detail below. The dyes themselves represented by the above formulas [A] and [B] are known, for example, from US Pat. No. 4,415,494. In the present invention, the disperse dyes represented by the above formulas [A] and [B] are mixed, and the mixing ratio thereof is usually [A]:
[B] = 10 to 90:90 to 10 (weight ratio), preferably 80 to 20:20 to 80 (weight ratio). If the amount of the component (B) used is too small or too large, there is a drawback that the effect of improving temperature dependency, build-up property and the like is insufficient and dyeing reproducibility is poor.

The disperse dye of the general formula [A] shown above, which is the object of the present invention, is diazotized, for example, with 2,4-dinitroaniline or 2-halo-4,6-dinitroaniline according to a known method, and this is N- By coupling with a phenylaminonaphthalene compound, the disperse dye represented by the general formula [B] shown above, for example, diazotizes 2-bromo-4,6-dinitroaniline to give a -NHCOR ² group at the m-position. Have N, N
-It can be easily produced by a coupling reaction with a diethylaniline derivative.

The disperse dye mixture prepared by mixing the above components [A] and [B] is useful as a navy color disperse dye mixture. The dye mixture is prepared by blending other dyes according to a conventional method. , Can be adjusted to a desired shade. In particular, the disperse dye mixture of the present invention is used as a navy color component of a black dye mixture, and the dye mixture blended with the orange component is a black dye mixture having good dye exhaustion rate, temperature dependence, and fastness to washing. The dye to be blended is not particularly limited, and a known orange dye is used. Examples of the orange component include the following formulas [C-1] and [C-
2] and the like.

[0008]

[Chemical 3]

[0009]

[Chemical 4]

The mixing ratio of the navy color component and the orange component in the black dye mixture is usually 80-50: 20-5.
It is about 0 (weight ratio). In using the disperse dye mixture of the present invention, by a conventional method, for example, naphthalenesulfonic acid-formalin condensate, ligninsulfonic acid-formalin condensate known anionic dispersants are mixed to obtain a dye cake. It is necessary to carry out dispersion treatment to prepare a disperse dye composition.

The disperse dye mixture of the present invention is mainly used for dyeing polyester fibers, but the polyester fibers may be used alone or as a mixture with other fibers. Although various dyeing methods can be applied, the present invention, when applied to the exhaust dyeing method, exhibits excellent dyeing property and temperature dependency, and further high temperature dispersibility. The dyeing conditions in the exhaust dyeing may be carrier dyeing using a carrier agent and are not particularly limited. For example, the dyeing temperature is 95 to 1
It is about 40 ° C. and the pH of the dyeing bath is about 4 to 9.5.

[0012]

EXAMPLES Next, the present invention will be described in more detail by way of examples, but the present invention is not limited to the following examples unless it exceeds the gist thereof. Reference Example <Preparation of each disperse dye> (1) Structural formulas [A-1] to [A- shown in Table 1 below.
52 g of each disperse dye of 7] together with 30 g of a ligninsulfonic acid-formalin condensate, 18 g of a naphthalenesulfonic acid-formalin condensate and 300 g of water are wet-ground for 5 hours with a sand grinder and spray-dried to obtain a powdered dye composition [A- 1] to [A-7] were obtained.

[0013]

[Table 1]

(2) In the above structural formula [B], R²But
CH₃Dyes [B-1] and R which are ²Is n-C₃H₇so
47 g of each disperse dye of a certain dye [B-2] is lignin
Rufonic acid-formalin condensate 50 g, naphthalene sulfo
Sun with 3 g of acid-formalin condensate and 300 g of water
Wet crush for 5 hours with a dog grinder and spray dry.
To give powder dye compositions [B-1] and [B-2]
Obtained. (3) Dispersion dyes of the structural formulas [C-1] and [C-2]
52 g of lignin sulfonic acid-formalin condensate 30
g, naphthalenesulfonic acid-formalin condensate 18 g and
Wet powder for 5 hours with sand grinder together with 300g of water
Powdery disperse dye composition by crushing and spray drying
The products [C-1] and [C-2] were obtained.

Examples 1 to 16 and Comparative Examples 1 to 13 [A-1] to [A-7] and [B-1] prepared in Reference Example.
To [B-2], each of the disperse dye compositions is blended so that the weight ratio of the disperse dyes is the ratio shown in Table 2, and a navy blue dyeing is performed according to the method shown below. Each test was conducted and evaluated. The results are shown in Table-2. <Dyeing method-high temperature dyeing> Polyester spun cloth is dyed at a density of 2% o. w. f. Then, using 1 g / l of an anionic leveling aid, pH 5.0 ± 0.
5, and dyeing was carried out at a bath ratio of 1:10 at 135 ° C. for 30 minutes. The obtained dyed cloth was reduced and washed at 80 ° C. for 10 minutes using 2 g / l of caustic soda, 2 g / l of hydrosulfite, and 1 g / 1 of a special anion / nonionic surfactant.

<Dyeing test> (1) Exhaust property (dye exhaustion rate) High-temperature dyeing was performed to optically analyze the amount of dye remaining in the dyeing bath, and the dye absorbency was determined from the amount of dye used and the amount of residual dye. I calculated the sufficiency. (2) Temperature Dependence In high temperature dyeing, the surface density of the dyed fabric dyed at a dyeing temperature of 135 ° C. or 120 ° C. was measured and the temperature dependency was evaluated according to the following formula. Temperature storability = (Surface density of dyed cloth at dyeing temperature of 120 ° C./Surface density of dyed cloth at dyeing temperature of 135 ° C.) × 100 (%) (3) Washing fastness Dyeing cloth obtained by high temperature dyeing Per JIS L0844
The 1973 (A-2) test was conducted to evaluate the degree of stain of the nylon white cloth.

[0017]

[Table 2]

Examples 17-40 and Comparative Examples 14-33 [A-1] to [A-7] and [B-1] prepared in Reference Example.
To [B-2], and further, each of the disperse dye compositions of [C-1] to [C-2] is blended so that the weight ratio of the disperse dyes is the ratio shown in Table-3. A black dyeing test was performed and evaluated. The results are shown in Table 2.

The dyeing method was carried out at a dyeing density of 4% in the dyeing methods of Examples 1 to 16 and Comparative Examples 1 to 13.
o. w. f. The same procedure as described above was used, and each dyeing test was carried out at a dyeing density of 40% o. w. f. The same evaluation was performed for the staining results in 1.

[0020]

[Table 3]

[0021]

[Table 4]

[0022]

The disperse dye mixture of the present invention has a dye exhaustion property,
It is a navy-based disperse dye mixture excellent in temperature dependency, washing fastness, etc., and is also useful as a navy component of a black dyeing dye mixture.

Claims (2)

[Claims] 1. A disperse dye represented by the following general formula [A]:
Disperse dyes represented by at least one kind and the following general formula [B]
A disperse dye mixture obtained by mixing at least one of the above. [Chemical 1] [Chemical 2] (In the formula [A], X represents a hydrogen atom or a halogen atom.
And R¹Is a hydrogen atom, C₁~ C₃Alkyl group or C₁~
C₃Represents an alkoxy group, and in the formula [B], R²Is C ₁~
C_FourRepresents an alkyl group) 2. The compounding ratio of the disperse dye represented by the general formula [A] shown above and the disperse dye represented by the general formula [B] shown above is 90.
10. The disperse dye mixture according to claim 1, which is from 10:10 to 90 (weight ratio).