JPS6351465A - Dye mixture - Google Patents

Abstract

PURPOSE:To obtain a dye mixture capable of dyeing a polyester/cellulose or nitrogen-containing fiber to blue color, by compounding a specific anthraquinone reactive disperse dye with a specific azo disperse dye. CONSTITUTION:The objective mixture is produced by mixing (A) a reactive disperse dye of formula I (R<1> is 2-4C alkyl) with (B) preferably 10-70wt.% disperse dye of formula II (R<2> is methyl or ethyl).

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to dye mixtures, and in particular, to lowering the fixation temperature when dyeing mixed fibers made of polyester/cellulose or nitrogen-containing fibers. The present invention relates to a dye mixture that can dye polyester and cellulose or nitrogen-containing fibers in the same color (blue color), as well as having good abrasion fastness.

Conventional technology Conventionally, mixed fabrics of polyester fibers and cellulose fibers such as cotton (hereinafter referred to as rP/C fibers J) have been dyed using disperse dyes for polyester fibers, and reactive dyes and reactive dyes for cellulose fibers. This was done using thren dyes or sulfur dyes. Problems in this case include that it is very difficult to match colors because two types of dyes are used, and that dyeing reproducibility is lacking.

Recently, a method of dyeing P/Ci fibers with a layer of reactive disperse dye has been proposed (13th Textile Processing Symposium, November 9, 1980, sponsored by the Japan Institute of Textile Science and Technology). According to this method, problems in color matching and dyeing reproducibility that have been problems in conventional dyeing can be solved, and it is also possible to dye with various practical colors without limiting the dye usage.

Problems to be Solved by the Invention However, when performing continuous dyeing by padding or printing using reactive disperse dyes that have been proposed in the past, fixation during dyeing generally occurs due to poor dyeing properties. It was necessary to raise the temperature, and there were many problems with fastness and level dyeing.

For example, a reactive disperse dye represented by the following general formula IA (in which R1 represents a C2 to C4 alkyl group) may be used as long as the fixation temperature during dyeing is 210'C or higher; If it is as low as 'C', there are disadvantages in that the dyeing property deteriorates and furthermore, the fastness to rubbing is reduced. In addition, this reactive disperse dye also had a problem in level dyeing properties, and in particular, when a laminated layer R5 of polyester cloth and cellulose cloth was dyed, the difference in tone between the two was noticeable.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to dye P/C fibers continuously using a reactive disperse dye represented by the general formula [A], for example,
Good dyeing is possible even at a fixing temperature of 'C, and
The object of the present invention is to provide a dye mixture that has good abrasion fastness and does not cause any difference in color tone between polyester and cellulose.

Means for Solving the Problems The above problems in the conventional technology are solved in the present invention.
A reactive disperse dye represented by the following general formula CA] [A] (wherein R1 represents a C2 to C4 alkyl group) is added to a reactive disperse dye represented by the following general formula [B] [Bco (wherein R2 is a methyl group or This problem can be solved by using a dye mixture containing a purple disperse dye represented by (representing an ethyl group).

The present invention will be explained in detail below.

In the dye mixture of the present invention, the blending ratio of the purple disperse dye represented by the general formula CB] is the reactive portion! i2
Dye [A] reaches, usually 10-70fffffi%
Therefore, if the amount of the disperse dye represented by the general formula [8] is necessarily too large, or if it is too small, the expected effects of the present invention will not be sufficiently exhibited, which is not preferable. .

Generally, in the present invention, in addition to the above-mentioned disperse dyes, it is even more preferable to blend a small amount of a known yellow disperse dye made of a monoazo compound, especially from the viewpoint of level dyeing properties. The blending amount of this yellow disperse dye 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 as shown in the following Mizozo formula, and two or more of these may be used in combination.

H3 CH3 When dyeing P/C fibers using the dye mixture of the present invention, after the dye mixture is commercialized, it is usually treated with a nonionic surfactant, a reaction catalyst (reactive disperse dye monofluorocarbon), etc. (for reacting triazinyl groups with OH groups of cellulose fibers), water, and, if necessary, a sizing agent to prepare a dye composition. The mixing ratio 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, 3 to 3% by weight of the nonionic surfactant.
20% by weight, preferably 5-12% by weight, reaction catalyst tR0
, 5 to 2% by weight, preferably 0.8 to 1.5% by weight. Further, the pH of this dye composition is usually 6.5 to 8.
．． 5, preferably 6.8 to 7.5.

The nonionic surfactant and reaction catalyst used here are not particularly limited, and any conventionally used ones may be used. For example, as a nonionic surfactant,
A surfactant represented by the general formula n is 6 to 30, preferably 7 to 10 is particularly preferable, and examples of the reaction catalyst include formic acid, acetic acid, benzoic acid, phthalic acid, lactic acid, and oxalic acid. Preferred are the sodium, potassium or ammonium salts of organic or inorganic acids, such as succinic acid, tartaric acid, citric acid, gAI, or carbamic acid.

In addition, various additives such as known penetrating/wetting agents, fJ1 agents, hydrotropic agents, anti-migration agents, etc. may be added to the dye composition, usually within a range of 151,196 or less.

The dyeing method to which the dye mixture of the present invention can be applied is usually padding or printing, and the operating procedure may be any known method. For example, in the case of padding,
Usually, the process is performed in the following order: pad bath adjustment step, padding step, squeezing step, drying step, fixing step, washing step, water washing step, and drying step. In the present invention, since the temperature sensitivity of the dye component is improved, good dyeing can be achieved even if 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 after the fixing step in order to increase dyeing efficiency. In this alkaline treatment, the dyed product that has been fixed is usually soaked in an alkaline aqueous solution such as 0.2% to 2% by weight of caustic alkali or alkali carbonate, and patted with 100% to 100% It is carried out by steaming or baking at a temperature of 230'C.

Furthermore, in the present invention, when a dyed product is washed in water containing a detergent in the washing process, if an alkali is present in the system, the undyed disperse dye on the dyed product can be effectively removed. This is preferable because it can be done. Namely, 1. The present invention contains a disperse dye for polyester fibers, and some of it stains and dyes cellulose fibers.
If the disperse dyes that have contaminated the cellulose fibers are not removed, there is a concern that the washing fastness and dry cleaning fastness will deteriorate, but if the washing process described above is adopted, such concerns can be easily resolved. can be avoided. The alkali used in this treatment is usually caustic alkali or carbonate alkali, and its concentration is, for example, 0.02 to 0.
5% by weight, preferably 0.1-0.3% by weight.

EXAMPLES Next, the present invention will be roughly and concretely explained by examples, but the present invention is not limited to the following examples.

The prerequisites for the tests in the Examples and Comparative Examples are as follows:
It is as follows.

■Dye dispersion A mixture of the following composition is pulverized using a sand grinder at very low temperatures.

Dye component 15g lignin sulfonate (manufactured by WeStVaCO, 3g trademark R
eax85A) Ethylene glycol 5 Composition of padding bath Dye dispersion 139CH30
+CH2CH2O+-388g Penetrant (Diaserver PN-3R> 0.1g Migration inhibitor
0.13 (Diaserver MG-N) CH3G OON H4 aqueous solution DH7 adjusted water
Remaining Mother ■Padding Dyeing Test The above dye composition was prepared as a pad bath, and the dyed fabrics were polyester/cotton (60/40) mixed woven fabric (warp: polyester, weft: cotton) and polyester/cotton (65/35).
) Using a blended fabric, continuous dyeing was carried out under the following conditions.

Padding 1dip-1nip squeezing rate 65% ↓ Drying 100℃ x 120 seconds ↓ Fixing treatment V'CX 60 seconds ↓ Alkali treatment Sodium hydroxide 10g/, Q1
dip-'i nip aperture rate ioo%↓
Steam treatment cleaning at 103°C for 30 seconds Sodium carbonate 2g/l Nonionic surfactant (Mitsubishi Chemical ↓ Manufactured by Seikogyo Co., Ltd., trademark Diaserver 5)
C-CT40) 5a/j 80°C The surface reflectance of the dyed cloth obtained in Example 3 was taken as 100 (standard), and a relative value was calculated.

(2) Fastness to rubbing Wet fastness to rubbing was measured by the method of JIS-1849.

(3) Isochromaticity Evaluation Next to the polyester/cotton (60/40) mixed woven fabric, the difference in hue between the polyester and cotton was visually determined.

(The larger the hue difference, the worse the same color property) Same color property ◎ ○ △ ) was evaluated by relative comparison with the dyed fabric obtained in the comparative example.

Level dyeing property ◎ ○ △ X Very good Excellent Very poor Poor Example 1~
2 and Comparative Example 1 [a] [b] [C] Using a dye mixture obtained by blending each dye of the above structural formulas [a] to [C] in the proportions shown in Table 1, the above dye dispersion was carried out. Adjust the solution, padding bath, polyester/cotton (6
0/40> Padding dyeing test using mixed woven fabric (
(temperature: 210°C). When the color constancy and abrasion fastness of polyester and cotton were measured, the results shown in Table 1 were obtained.

Table 1 Example 3 and Comparative Examples 2-3 In the method of Example 1, polyester/cotton (65/3
5) A padding dyeing test was conducted using the blended fabric under the fixing conditions shown in Table 2 to determine the dyeability and level dyeing properties, and the results shown in Table 2 were obtained.

Table 2 Effects of the Invention As detailed above, according to the present invention, by blending a specific disperse dye with a specific reactive disperse dye, the abrasion fastness is improved and the fixation temperature during dyeing is reduced. Even if it is low, it shows high dyeing property, and the level dyeing property and same color property at that time are also extremely excellent.

Therefore, the dye mixture of the present invention has industrial value as a dye for simultaneously dyeing mixed fibers of polyester and cellulose or nitrogen-containing fibers in one bath.

Claims (2)

[Claims] (1) General formula [A] below ▲ Numerical formulas, chemical formulas, tables, etc. are available ▼ [A] (In the formula, R^1 represents an alkyl group of C_2 to C_4)
The reactive disperse dye represented by the following general formula [B] ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ [B] (In the formula, R_2 represents a methyl group or an ethyl group). dye mixture. (2) Claim 1, wherein the blending ratio of the disperse dye represented by the general formula [B] is 10 to 70% by weight based on the reactive disperse dye represented by the general formula [A]. The dye mixture described in.