JPH0711588A - Dyeing of fiber material with benzodifuranone-type disperse dye - Google Patents

Abstract

PURPOSE:To obtain an industrially advantageous dyeing process free from troubles of unlevel dyeing, change of hue, etc., by dyeing especially a hydrophobic fiber with a benzodifuranone-type disperse dye in excellent dyeability. CONSTITUTION:A fiber material is dyed with a benzodifuranone-type disperse dye in a bathing bath of pH 3-6.5 consisting of ClarkLubs buffer solution, Sphirensen buffer solution, Kolthoff buffer solution, Michaelis buffer solution (except for buffer solutions containing acetic acid and sodium acetate), Mclvalne buffer solution or Walpole buffer solution (except for buffer solutions containing acetic acid and sodium acetate) or their diluted solutions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for dyeing a fiber material, particularly a hydrophobic fiber material, with a benzodifuranone type disperse dye.

[0002]

Prior Art and Problems to be Solved by the Invention For example, JP-A-60-152567, JP-A-52-109526 and JP-A-56-1.
22869 and Japanese Patent Application Laid-Open No. 3-72571 disclose that various benzodifuranone compounds are useful as disperse dyes particularly for dyeing hydrophobic fibers. However, when these benzodifuranone-based disperse dyes are used for dyeing, problems such as a decrease in dyeing density and a change in hue occur depending on the conditions in the dyeing process, and their solution is desired.

Further, JP-A-56-45960 describes a method of dyeing a hydrophobic fiber using a disperse dye and a buffer solution capable of maintaining the pH of a dye bath at a weak acidity. Has been done. However, for example, a buffer solution composed of an acid of the same system and a salt thereof such as acetic acid and sodium acetate and sulfuric acid and sodium sulfate cannot obtain a sufficient buffering effect, and a buffer solution composed of sulfuric acid and an organic acid salt is not available. Proposed.

The inventors of the present invention should find an industrially advantageous dyeing method for dyeing a hydrophobic fiber material, particularly polyester fiber with an excellent dyeability with a benzodifuranone-based disperse dye, and causing no uneven dyeing or hue change. As a result of intensive studies, the present invention has been completed.

[0005]

The present invention uses a benzodifuranone-based disperse dye and uses Clark-Lubs.
Buffer solution, Sφrensen buffer solution, Kolthoff buffer solution, Mihail (Mic
haelis) buffer solution (excluding buffer solution containing acetic acid and sodium acetate), McIvain (McIvain
e) buffer solution or Walpole buffer solution (excluding buffer solution containing acetic acid and sodium acetate) or a diluted solution thereof, and having a pH of 3 to 6.
A method for dyeing a fiber material is provided, which comprises dyeing in a dye bath of No. 5.

In the method of the present invention, any of the benzodifuranone compounds described in the above publications can be used as the disperse dye. Among them, the following general formula (I) is particularly preferable.

[0007]

[Chemical 1]

[Wherein R is a hydrogen atom, a hydroxyl group, C₁~ C
_FourAlkyl group, C₁~ C_FourAlkoxy C₁~ C_FourArchi
Lu group, C₁~ C_FourAlkylcarbonyl group, C₁~ C_FourA
Lucoxycarbonyl C₁~ C_FourAlkyl group, phenyl C
₁~ C_FourAlkyl group, C₁~ C _FourAlkoxy C₁~ C_Four
Alkoxycarbonyl C₁~ C_FourAn alkyl group, or-
OR₁Q (here R₁Is a methylene group or a hydroxyl group,
C₁~ C_FourAlkoxy group or C₁~ C_FourAlkyl
A straight chain optionally substituted with a carbonyloxy group or
Branch C₂~ C₆Represents an alkylene group, where Q is substituted
5 or 6 membered saturated or unsaturated heterocycle which may be present
Represents a residue. ) Is represented. ] Fewer compounds
Both types are advantageous.

Among the compounds represented by the general formula (I), specific examples of the compounds which are particularly preferably used are shown in Table 1 below.

[0010]

[Table 1]

These compounds are subjected to atomization treatment with a sand mill or the like in the presence of water together with an anionic or nonionic surfactant, and as they are or dried, the present invention is carried out as a powdery or granular disperse dye. It is used to

According to the method of the present invention, a benzodifuranone-based disperse dye is dispersed and suspended in a predetermined amount of water, and the pH of the suspension is fixed to 3 to 6.5 by a buffering action. Then, the fiber material to be dyed is added to, and dyeing is carried out, for example, under normal pressure in the presence of a carrier at a temperature range of up to 100 ° C, or in a closed dyeing apparatus at a temperature range of 120-150 ° C under pressure. It can be carried out by dyeing. The bath ratio is usually 1: 5 to 1:50, and the dyeing time is usually 5 to 60 minutes.

Clark-Lubs buffer solution having a pH of 3 to 6.5, Sφrens
en) buffer solution, Kolthoff buffer solution,
Buffer solution of Michaelis, McIvein (Mc
The buffer solution of Ivaine) and the buffer solution of Walpole are both described in "Chemical Handbook Basic Edition II", edited by The Chemical Society of Japan, published by Maruzen Co., Ltd. on September 25, 1966. These buffer solutions can be used as they are, or can be used after diluting them appropriately. The dilution ratio (weight of the buffer solution / weight of water) is not particularly limited, but is preferably in the range of 1/2 to 1/100. If desired, a dyeing aid such as a wetting agent, a dispersant, an antifoaming agent or the like, which is usually used for dyeing a fiber material using a disperse dye, can be added to the dye bath in the present invention.

As the fiber material in the present invention, a fiber material mainly made of linear polymer ester of aromatic polycarboxylic acid and polyhydric alcohol, typically terephthalic acid and ethylene glycol or dimethylcyclohexane. Polyester fiber materials made of terephthalic acid, isophthalic acid and ethylene glycol are preferred. The shape of these fibrous materials is arbitrary, for example, flock,
Roving (slapping), yarn, processed filament,
Knitting, woven fabric, etc. are exemplified. The fiber material in the present invention may further include polyamide fiber material such as polyamide 6, polyamide 66 or polyamide 12.

According to the method of the present invention, there is no change in pH during dyeing, economical and effective dyeing is possible, re-dyeing treatment due to poor dyeing is unnecessary, and disperse dyes in dyeing process are not required. It is possible to obtain a deep-colored dyeing product which is free from decomposition, has a high exhaustion rate, is excellent in levelness, and is free from hue change.

[0016]

EXAMPLES The present invention will be described in more detail with reference to examples below, but the present invention is not limited to these examples. In the examples, parts represent parts by weight.

Example 1 No. 1 in Table 1 above. 1.0 part of the compound of 5 was finely dispersed in an aqueous medium together with 3.0 parts of a condensate of naphthalene sulfonic acid and formaldehyde. 0.6 part of the powder obtained by drying this dye dispersion was diluted with water to 1000 parts.
Further, 8.9 parts of potassium hydrogen phthalate and 0.954 part of sodium hydroxide were dissolved to obtain a buffer solution having a pH of 5.0. Immerse 10 parts of Tetoron jersey (polyester cloth, product of Toray Industries, Inc.) in this dyebath and pressurize at 130-135 ° C.
Staining was performed for 60 minutes. Then, the dyed product was treated with a treatment solution containing 3 parts of sodium hydroxide, 3 parts of hydrosulfite, 3 parts of betaine-type amphoteric surfactant and 3,000 parts of water at 85 ° C.
After performing reduction washing for minutes, washing with water and drying, a uniform and bright red dyed product was obtained.

Examples 2 to 17 Dye baths were prepared in the same manner as in Example 1 using the compound (5).
Further, the pH was fixed with the buffer solution shown in Table 2 below, and the same operation as in Example 1 was carried out thereafter.
A uniform, bright red dyeing is obtained.

[0019]

[Table 2]

Examples 18 to 34 Instead of the compound (5), the compound No. 1 to
Dyeing was performed in the same manner as in Example 1 using Nos. 4 and 6 to 18, and in each case, a uniform and clear red dyed product was obtained.

Claims (1)

[Claims] 1. A benzodifuranone-based disperse dye is used, and a Clark-Lubs buffer solution, a Sφrensen buffer solution, a Kolthoff buffer solution, and a Michaelis buffer solution (however,
The buffer solution containing acetic acid and sodium acetate is removed. ),
A McIvaine buffer solution or a Walpole buffer solution (excluding a buffer solution containing acetic acid and sodium acetate) or a diluted solution thereof, which has a pH of 3 to 6.5. A method for dyeing a fiber material, which comprises dyeing in a bath.