JPS61204274A - Dye mixture for synthetic fiber, and dyeing method - Google Patents

Abstract

PURPOSE:To obtain a dye mixture having excellent color fastness to light, high degree of exhaustion and excellent build-up property, and capable of coloring a synthetic fiber, especially polyester fiber in blue-navy color, by mixing plural kinds of specific dyes. CONSTITUTION:The objective dye mixture can be produced by mixing (A) 30-70wt% dye of formula I with (B) 30-70% dye of formula II and if necessary, (C) preferably 1-30% dye of formula III (X<1> and X<2> are nitro, cyano or halogen).

Description

Detailed Description of the Invention Industrial Application The present invention comprises 30 to 70% by weight of a dye represented by the following formula (1), 30 to 70% by weight of a dye represented by the following formula (2), and if necessary, a dye represented by the following formula (2). Formula (3) C In formula (3), Xi and X2 represent a nitro group, a cyano group, or a halogen atom. The present invention relates to a dye mixture containing 0 to 30% by weight of the dye represented by the following formula, and a method for dyeing synthetic fibers or semi-synthetic fibers using the dye mixture.

1Jbom The dyes of formula (1) and formula (2) of the present invention are JP-A-59-1
97464 and is publicly known, and the formula (3)
For example, dyes represented by the following formulas (4) to (8) have been commercially available for some time.

Further, as a similar dye to the blue to navy dyes of these formulas (4) to (8), the dye represented by the following formula (9) is in great demand and is a well-known dye for a long time.

Problem 11: Although the dyes represented by the above formulas U) and (2) according to the present invention are excellent in various fastnesses, especially lightfastness, their dyeability is inferior to that of conventional dyes. Azo blue dyes are inferior to dyes such as formula (9) above, and have the disadvantage that when dyed with the same amount of dye as conventional azo dyes, the dyeing density on synthetic fibers, especially polyester fibers, is low. Understood.

In addition, the dye represented by formula (9) (color index
l/-79) was unsatisfactory in light fastness and color value, and other dyes of formulas (4) to (8) were also unsatisfactory in sublimation fastness.

The present inventors conducted an intensive search for blue to navy dyes that have a high dyeing rate and excellent build-up properties when dyeing or printing synthetic fibers, especially polyester fibers, and have found one set ( 1) Dye (30
~70% by weight) and the dye represented by formula (2) (30~7% by weight)
It was found that when 0 weight q6) is mixed, the dyeing rate is significantly improved compared to when dyeing with only the dye of formula (1) or formula (2).

In addition, at that time, the dye represented by formula (3) (1 to 30% by weight)
) was also found to improve build-up performance.

The disazo dye represented by the above formula (1) or (2) used in the dye mixture of the present invention is prepared by diazotizing the amine represented by the following formula (wherein X is a hydrogen atom or a nitro group) according to a known method. A monoazo compound represented by the following formula (in the formula, X is a hydrogen atom or a nitro group) obtained by coupling with an aminothiophene represented by the formula is diazotized to obtain N-ethyl-N-cyanoethylaniline shown below. It can be manufactured by coupling with

In carrying out the present invention, the press cake of each dye to be blended is atomized and dispersed in an aqueous medium using a suitable dispersant, such as a condensate of naphthalene sulfonic acid and formalin, and then either directly powdered or sprayed. It is advantageous to form the dye into a powder by drying or the like and then blend it in a desired proportion to form a blue to navy dye composition.

In order to dye polyester fibers using the dye mixture of the present invention obtained in this manner, the dye mixture must be heated at 105° C. or higher under pressure.
Preferably, a method of dyeing at ilO to 140°C, a relatively high temperature in the presence of a carrier such as O-phenylphenol,
For example, a method of dyeing at the boiling point of water or a method of publishing a dye dispersion on cloth and subjecting it to dry heat treatment at 150 to 240° C. for 30 to 60 seconds (thermosol method), etc. can be mentioned.

On the other hand, in the case of printing, the dye composition is kneaded with a suitable thickening agent such as guar gum or locust bean gum, and the mixture is printed on cloth and treated by steaming or thermosol method to achieve the purpose.

Function and Effect The dyes represented by formulas (1) and (2) each have the following properties:
It had a low affinity for polyester cloth, and it was difficult to obtain a practical dyeing density. In other words, insufficient density during dyeing at 5thowf or higher, temperature sensitivity (e.g. 120°C
Since the dyeing density during dyeing and dyeing at 130°C was large, it could not be put to practical use. However, if these drawbacks are solved by using a mixture dye as in the present invention,
1 Dyes used (e.g. Color Index).

A high-quality dye with better fastness and less PH sensitivity than Bluff 9) was obtained.

These specific effects are shown in the table.

Example 1 of ^He-eJ 5 parts of the dye of the formula (2) below, 5 parts of the dye of the formula (), 20 parts of Demol N (product of Kao Atlas Co., Ltd.) and 30 parts of water were mixed and atomized. It was dried to obtain a type product.

100 parts of a polyester fabric was immersed in a solution in which 6 parts of this type product was dispersed in 200 parts of water, and dyed under pressure at 130°C for 1 hour. Next, the dyed cloth was immersed in 1000 parts of water containing 20 parts of hydrosulfide and 20 parts of caustic soda, washed with water and dried to obtain a dark blue dyed product.

Light fastness of this dyed cloth (JIS LO842-
Sublimation fastness grade 4 (JIS L 0879-197
5 (180°C for 30 seconds). The same applies to the following examples).

AATCCIIA washing fastness grade 3-4, water fastness grade 5 (resin addition with Sumitex Resin UN-1)
IS LO846-1976 (Method B 16 hours) and the example below was the same).

5 parts of formula 10 hardening dye 4 parts of formula 1 @) 1 part of dye and 2 parts of Demol C (Kao Atlas A Jinsan a) (1 part and 3 parts of water)
0 parts were mixed and atomized into 2 NJ). It was dried to obtain a type product.

When 6 parts of the above type product were dyed in the same manner as in Example 1, a dark blue dyed cloth was obtained.The light fastness of this dyed cloth was 6-7, the sublimation fastness was 4, and A.
Example 3 5 parts of the dye of the formula (5) of Example 1, 3 parts of the dye of the formula () and 2 of the dye of the following formula ρ) 1 part, 2 parts of thymol N, and 18 parts of water were mixed and atomized to obtain a paste-like dye mixture.

3 parts of this dye mixture, Meybrogum NP (Meyhai)
1 company's product) A color paste consisting of 60 parts of the solution manufactured by 12 companies, 0.5 parts of sodium chlorate, and 36.5 parts of water was printed on polyester cloth, and after intermediate drying at 80°C, it was heated with high-pressure steam at 175°C for 7 minutes. Steamed. Then, by washing with water and reduction washing, a blue dyed cloth was obtained.The dyed cloth had a light fastness level of 7th grade, a sublimation fastness level of 4th grade, A A
T CCIIA washing fastness was 4th grade and water fastness was 5th grade.

Example 4 5 parts of the dye of formula (5) of Example 1, 3 parts of the dye of formula 03) and 2 parts of the dye of the following formula (5) were mixed with 5 parts of Demol N (product of Kao Atlas Co., Ltd.) and 15 parts of water. By atomizing the particles,
A liquid dye mixture was obtained.

5 parts of the above liquid dye mixture, 0.5 parts of citric acid and 0.2 parts of sodium alginate were dispersed in 100 parts of water, and the dispersion was padded with polyester processed thread cloth, followed by intermediate drying at 80°C. The fabric was dyed by dry heat heating (thermosol dyeing) at 210°C for 1 minute, followed by reduction washing and water washing to obtain a dark blue dyed fabric. The light fastness of this dyed fabric is 6-7 grade, sublimation fastness grade 4, AATC
CI [A Method] Washing fastness was 4th grade and water fastness was 5th grade.

Claims (1)

[Claims] 1 30 to 70% by weight of the dye represented by the following formula (1) ▲ Numerical formulas, chemical formulas, tables, etc. ▼ (1) 30 to 70% by weight of the dye represented by the following formula (2) ▲There are mathematical formulas, chemical formulas, tables, etc.▼ (2) and if necessary, dyes 0 to 30 shown in the following formula (3)
Weight% ▲There are mathematical formulas, chemical formulas, tables, etc.▼(3) (In formula (3), X^1 and X^2 each independently represent a nitro group,
Represents a cyano group or a halogen atom. ) dye mixture for synthetic fibers. 2 The following formula (1) ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ 30 to 70% by weight of the dye shown in (1) and 30 to 70% by weight of the dye shown in the following formula (2) ▲ Numerical formulas, chemical formulas, tables, etc. etc. ▼ (2) and, if necessary, dyes 0 to 30 represented by the following formula (3)
Weight% ▲There are mathematical formulas, chemical formulas, tables, etc.▼(3) (In formula (3), X^1 and X^2 each independently represent a nitro group,
Represents a cyano group or a halogen atom. ) A method of dyeing or printing synthetic or semi-synthetic fibers using a dye mixture consisting of: