JPS58180688A - Enhancement of chlorine fastness of dyed article - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for improving the fastness to chlorine water of dyed cellulose fibers using direct dyes or reactive dyes.

Cellulose fibers are mainly dyed with direct dyes and reactive dyes, but their fastness to chlorine water has not always been good. Such problems with chlorine water fastness often occur when dyed items are washed with tap water.

This is because chlorine, which is added to tap water for sterilization purposes,
This is because it acts as a decolorizing agent for dyed products, and the dyed products become discolored or bleached, and especially when exposed to tap water for a long time, the total amount of chlorine that acts becomes very large, and the effect becomes even more pronounced. Become.

As a measure to improve the fastness to chlorine water of such dyed products, efforts have been made to improve the structure of the dye itself, but the problem with specific colors remains unsolved. Although the use of special fixing agents and the like has been considered, there is a strong demand for the development of superior methods that can reduce the fastness to sunlight and change processing.

In view of these circumstances, the inventors of the present invention have conducted extensive research and have developed dyed cellulose fibers using direct dyes and reactive dyes.
It has been discovered that a dyed product with excellent chlorine water fastness can be obtained by resin processing with a treatment bath containing a cellulose-reactive resin, urea, and a catalyst, and the present invention has been achieved.

That is, the present invention provides a cellulose-based fiber, which is characterized in that a dyed cellulose-based fiber dyed using a direct dye or a reactive dye is subjected to resin processing in a processing bath containing a cellulose-reactive resin, urea, and a catalyst. This is a method for improving the fastness of dyed products to chlorine water.

In the present invention, direct dyes and reactive dyes are known per se as dyes for cellulose fibers,
Everything can be used.

Examples of cellulosic fibers include cotton, hemp, regenerated cellulose, and blends, weaves, and knits and twists of these and synthetic fibers.

Dyeings of cellulosic fibers using direct dyes, reactive dyes, or both can be obtained by dyeing in a manner known per se. In this case, the dyed product may be a mixed fiber of synthetic fibers and cellulose fibers dyed with other dyes, such as hydrophobic dyes and reactive dyes.

lil fiber-reactive resins are those normally used for resin processing of cellulose fibers, etc., and include, for example, the following.

Methylol ethylene urea methylol triazone methylol uron methylol propylene urea methylol glyoxal urein methylol glyoxal J3 rhein methylol carbamate The amount used varies depending on the desired anti-shrinkage effect, but is usually 8-20% of the treatment bath. Used in heavy parts range.

Catalysts are used to accelerate the curing of cellulose-reactive resins such as those mentioned above, and examples include magnesium chloride, zinc borofluoride, zinc nitrate, and organic acid mixtures thereof. An appropriate amount is added depending on the core.

The amount of urea used in the present invention is 0 to the treatment bath.
．． 06-5 parts by weight, more preferably 0.0
It is 5-2 parts by weight.

In the treatment bath of the present invention, other additives commonly used as chemicals, such as softeners, liquid additives, fixing agents, etc., may be appropriately added. A cellulosic fiber dyed product dyed using a synthetic dye is prepared in a treatment bath containing a cellulose reaction type @ 8-20 parts by weight, 0.05-5 parts by weight of urea and an appropriate amount of catalyst, and then After uniformly zf disogging this and squeezing the liquid uniformly with a mangle, pre-drying at 80-110°C, and further drying at 180-110°C.
This can be carried out by performing a curing treatment at 160°C for 2-5 minutes.

The fastness to chlorine water of the resin-processed product obtained in this way is extremely superior to that obtained by conventional methods.

The present invention will be described in more detail with reference to Reference Examples and Examples. In the text, parts and parts represent parts by weight.

Reference example (preparation of dyed products) The dyed products used in the Examples were prepared under the following conditions.

◎Dye used Sumifix Blank B (C0■, Reactive Black 5) Sumifix Yellow GR8 (C, ■, Reactive Yellow 116) Sumifix Red B (C0■, Reactive Red 22) Sumifix Spra Red 4BL (C1 ■, Direct Red 79) Sumilite Spraviolet BL (C0■, Direct Violet 66) (Sho) Sumifix (manufactured by Sumitomo Chemical Co., Ltd.) Reactive dyes 2 Light 2 Direct dyes C, X, : Color index ◎ Dyeing conditions (11 Reactive dye dye 24 (0, W, f) Nosato 50 ?
/l soda ash 20 f/l in a bath ratio of 1:20 at a dyeing temperature of 50°C for 60 minutes and then washed.

(2) Direct dye Dye 1% (OLW, F,) ? Glass 59/ Bath ratio l: 80 Dyeing and humidity at 90°C for 60 minutes, then washed.

(8) Dyed fabric unmercerized cotton knitted fabric Example 1 Each dyed product obtained in the reference example was impregnated in the following treatment bath,
After squeezing the liquid with a mangle, preliminary drying was performed at 80°C for 2 minutes, and then a curing jig was performed at 150°C for 8 minutes.

Treatment bath composition 1) Smear Nox Resin N5-18 10 [
Sumia Kus Accelerator x-so” a
mUrea 0.
Part 2 Sumitex Softener L 79
Total 100 parts (Note +
l) Cellulose-reactive glyoxal resin (product of Sumitomo Chemical Co., Ltd.) 2) Magnesium chloride catalyst (product of Sumitomo Chemical Co., Ltd.) The fastness to chlorine water (I80 method:
Available chlorine 20 im, room m (20C±2℃) x 4 hours]
We just conducted a test! ! ! A result of 1 was obtained.

Example 2 After preparing the following treatment bath, resin processing was performed in the same manner as in Example 1. When the resulting resin-treated cloth was tested for fastness to chlorine water, the results shown in Table 1 were obtained.

Treatment bath composition Water remaining amount Total lOO part

Claims (1)

[Claims] Chlorine water fastness of dyed cellulose fibers, which is characterized by processing dyed cellulose fibers dyed with direct dyes or reactive dyes in a treatment bath containing a cellulose-reactive resin, urea, and a catalyst. Improvement method.