JPH01284562A - Dye composition for dyeing hydrophobic fiber black and production of hydrophobic fiber dyed black - Google Patents

Abstract

PURPOSE:To make it possible to dye a hydrophobic fiber in a stable black color which is deep under various sources of light by mixing a specified anthraquinone dye with a black disperse dye. CONSTITUTION:A 1,4,5,8-tetraaminoanthraquinone derivative (A) of the formula (wherein R1, R2, R3 and R4 each independently represent H or a phenyl which may be substituted with CF3, OH, alkyl, alkoxy or phenoxy) is mixed with a black disperse dye (B), for example, Sumikaron Yellow-Brown S-2RI in a ratio of, usually, 3-80:97-20, desirably, 5-50:95-50 to form a dye composition for dyeing a hydrophobic fiber such as a polyester or a polyamide black.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a dye composition for black dyeing of hydrophobic fibers and a method for producing a black dyed product of hydrophobic fibers.

<Prior Art> Hydrophobic m fibers such as polyester wt fibers are often dyed black for use in formal wear and the like.

However, it has been pointed out that these black dyed products have problems compared to black dyed silk or wool products, such as a lack of depth and a reddish-brown hue depending on the light source.

A method to solve this problem is to use a fabric made of spun-dyed polyester containing carbon black, dye it with a black dye, and then attach a compound with a low refractive index to the surface of the fibers that make up the fabric. (Unexamined Japanese Patent Publication No. 58
-120890) and the like are known.

<Problems to be Solved by the Invention> However, these methods cannot be said to be sufficient as methods for producing deep black dyed products with stable color tone under various light sources, and the present inventors have attempted to solve these problems. As a result of intensive research to solve the problem, we have completed the present invention.

Means for Solving the Problems> The present invention relates to the following general formula (1) (wherein R, R2, R, and R each independently represent a hydrogen atom, a trifluoromethyl group, a hydroxy group, an alkyl group, Represents a phenyl group which may be substituted with an alkoxy group or a phenoxy group.However, R1,
Any two or more of Ra, Re and to represent the above-mentioned phenyl group. ) A dye composition for dyeing hydrophobic fibers black, comprising at least one compound represented by formula (I) and a black disperse dye, and at least one compound represented by the general formula (I) and a black disperse dye. Provided is a method for producing a black dyed product of hydrophobic fibers, which is characterized by coloring using a hydrophobic fiber.

an alkyl group optionally substituted with a phenyl group represented by R, Ra, or 8 in the general formula (1);
As the alkoxy group, an alkyl group or an alkoxy group having usually 1 to 4 carbon atoms is preferable.

Among the compounds represented by the general formula (I) used in the present invention, preferred compounds are those represented by the following formula (1) to those represented by the formulas (2) and (8).

In the present invention, the black disperse dye that can be used in combination with the compound represented by the general formula (I) may be any disperse dye commonly known as a black dye, including benzeneazo, heteroazo, anthraquinone, One or more kinds of disperse dyes can be arbitrarily selected from quinophthalone-based, coumarin-based, styryl-based, methine-based disperse dyes, and the like.

The blending ratio of the compound represented by formula (I) and the black disperse dye in the dye composition for black dyeing of the present invention is not particularly limited, but is usually 8 to 80:97 to 2.
0, preferably 5 to 50:95 to 50.

The dye composition of the present invention may contain additives commonly used in the field of dyeing hydrophobic fibers, such as dispersants and dyeing aids.

Examples of hydrophobic fibers in the present invention include synthetic or semi-synthetic fibers such as polyester, polyamide, and cellulose acetate, blends of these fibers, and blends of these fibers with natural fibers such as cotton, wool, and silk. Ru.

In order to produce a black dyed product by coloring these hydrophobic lines, the above-mentioned dye composition can be used and a known dyeing method or printing method can be applied. Dyeing (6) The method can be carried out by dispersing the dye composition in water, adding additives as necessary to prepare a dyeing bath, immersing the lia fiber material, and subjecting it to an appropriate heat treatment. The printing method can be carried out by adding a color pattern to the fiber material using a colored paste prepared by adding glue to an aqueous dispersion of a dye composition, and then heat-treating the fiber material using hot air or steam.Also, polyester, etc. In the case of synthetic fibers of When the compound represented by formula (I) is dyed with a stock solution, the desired black dyed product can be obtained by applying the above-described dyeing method using a black disperse dye.

In this way, it is possible to obtain a black dyed product of hydrophobic fibers that has a deep and stable color tone even under various light sources.

The present invention will be specifically explained below with reference to Examples and Comparative Examples.

In the text, parts indicate parts by weight.

Example 1 25 parts of the compound represented by the above formula (2), 40 parts of Reax 86A (manufactured by West Barco) as an anionic dispersant, and 25 parts of water are atomized and dispersed using a sand grinder.

4 parts of the above dispersion liquid, Sumikalon Yellow Brown S-2RL (disperse dye manufactured by Sumikagaku Co., Ltd., C,
1. Disbirds Orange 80) 8.2 parts (as pure dye, the same applies hereinafter), Sumikaron Violet S-4RL
(Same as above, C, 1, Disbird's Violet 77) 1
．． 0 copies, Sumikaron Navy Blue S-8G (same as above, C
01, Disperse Blue 801) 2.8 parts, Sumikalon Red 5-GG (same as above, C, I, Disperse Red 185) 0.4 parts, and Sumibon TF (Dyeing aid manufactured by Sumima Kagaku Co., Ltd.) 8.5 parts Add pH 5 buffer (
Add 2,500 parts of the dyeing solution (prepared with sodium monophosphate and sodium diphosphate) and water and dye at 180C for 60 minutes to obtain a black dyed fabric.

The reflectance of the obtained dyed cloth was measured using a Macbeth 2020 colorimeter. As a result, it was found that the obtained dyed product had a low reflectance after 600 nm, as shown in A in FIG. 1, and had a deep black color because light in the long wavelength region was absorbed.

Comparative Example 1 A black dyed fabric was obtained in the same manner as in Example 1 using a dye bath that did not contain the dispersion of the compound represented by formula (2).

The reflectance was measured in the same manner as in Example 1, and as shown in B in FIG. 1, the reflectance was high in the long wavelength region after 600 parts m.

Example 2 8 parts of the compound represented by the formula (8) was added to 97 parts of the polymer during melt spinning of polyester woven fabric to obtain 100 parts of colored polyester fiber.

This was dyed by the same dyeing method using the disperse dye used as the black disperse dye in Example 1 to obtain a deep black dyed fabric. The dyed fabric had a similar deep black color when viewed under incandescent light and xenon standard white light sources.

[Brief explanation of the drawing]

Figure 1 shows the reflectance of dyed fabrics. In the figure, the vertical axis represents the reflectance (to), the horizontal axis represents the wavelength (nm), and curves A and B represent the reflectance at each wavelength of the dyed fabrics obtained in Example 1 and Comparative Example 1, respectively. shows. (10 complete)

Claims (2)

[Claims] (1) The following general formula (I) ▲Mathematical formulas, chemical formulas, tables, etc.▼(I) (In the formula, R_1, R_2, R_3, and R_4 are each independently a hydrogen atom, a trifluoromethyl group, a hydroxy group, or an alkyl group. , represents a phenyl group which may be substituted with an alkoxy group or a phenoxy group.However, any 2 of R_1, R_2, R_3 and R_4
The above represents the above-mentioned phenyl group. A dye composition for black dyeing hydrophobic fibers, comprising at least one compound represented by the following formula and a black disperse dye. (2) A method for producing a black dyed product of hydrophobic fibers, which comprises coloring using at least one compound represented by the general formula (I) according to claim 1 and a black disperse dye.