JPH0737717B2 - Soaping agent for reactive dyeing - Google Patents

Description

The present invention relates to a soaping agent for reactive dyeing.

[Prior art and its problems]

Reactive dyes are cellulosic fibers because they have a clear color and are robust, they do not require special equipment, can use inexpensive auxiliaries, and various dyeing methods such as dipping, printing and continuous dyeing can be done easily. It is widely used for dyeing protein and textile products.

However, in dyeing using reactive dyes (reactive dyeing), in order to prevent bleeding and obtain clear and fast dyed products,
Unreacted (unfixed) dyes, hydrolyzed dyes, and auxiliary agents are required to sufficiently clean soap and wash with hot water to remove alkali.

Conventionally, as soaping agents for reactive dyeing, anionic activators such as soaps, higher alcohol sulfates, alkyl sulfonates and alkyl allyl sulfonates, salts of polyacrylic acid, salts of polyacrylic acid and maleic anhydride copolymers, etc. Polymeric anion activators, nonionic activators such as polyoxyethylene alkyl allyl ether and polyoxyethylene alkyl ether, and blends of these anionic activators and nonionic activators are used.

However, many of the above-mentioned conventional soaping agents have insufficient removal ability of unreacted dyes, and there is a drawback that it is difficult to obtain a dyed product having a clear and fast hue unless soaping and hot water washing are repeated several times. Therefore, a heavy burden is imposed on wastewater treatment and production efficiency is reduced. Further, the conventional soaping agent has a drawback that foaming is large and scum is generated during the processing, and the foam overflows during the processing, or the scum adheres to the treated cloth to deteriorate the working efficiency and quality.

[Means for solving problems]

Therefore, the present inventor arrived at the present invention as a result of earnest research to develop a soaping agent for reactive dyeing which does not have the above-mentioned drawbacks and has excellent soaping performance.

That is, the present invention has a medium weight average molecular weight of polystyrene sulfonic acid or a salt thereof (hereinafter referred to as “molecular weight”) of 2,000 to 1,50.
A soaping agent for reactive dyeing is used with about 0,000 or a mixture thereof. The polyethylene sulfonic acid may be polystyrene sulfonated by a known method, or may be obtained by polymerizing styrene sulfonic acid.

As the salt of polyethylene sulfonic acid, sodium salt,
Alkali metal salts such as potassium salts, amines such as monoethanoalamine and triethanolamine, and ammonium salts are used.

If the molecular weight of polyethylene sulfonic acid or a salt thereof is too low, it will be difficult in terms of performance and production, and if it is too high, there will be problems in solubility and performance. More preferably, it is 5,000 to 100,000. These compounds can be used alone or as a mixture, and can also be used in combination with a conventional soaping agent.

The use amount of the soaping agent of the present invention is not particularly limited,
As a soaping bath, the effect is seen at 0.05 g / l or more, and about 0.2 g / l to 1.0 g / l is practically sufficient.

〔Example〕

 Next, the present invention will be described in more detail with reference to Examples.

(1) Preparation of test cloth First, a cotton knitted cloth is dyed under the following conditions to prepare a test cloth.

Diamira Brill.Red BB (CIReactive Red 21) 5
% Owf Anhydrous sodium sulfate 50g / l Soda ash 20g / l Treatment bath (bath ratio 1:20) After dyeing at 60 ℃ for 60 minutes,
It was washed with hot water at 30 ° C. for 30 seconds and then with water (overflow).

Procion Blue HE-RD (CIReactive Blue 160)
5% owf anhydrous sodium sulfate 80g / l soda ash 20g / l treatment bath (bath ratio 1:20), after dyeing at 80 ℃ for 60 minutes,
It was washed with hot water at 30 ° C. for 30 seconds and then with water (overflow).

Levafix Orange E−3GA (CIReactive Orange 6
4) After dyeing in a treatment bath of 5% owf anhydrous sodium sulfate 50g / l soda ash 20g / l (bath ratio 1:20) at 40 ° C for 60 minutes,
It was washed with hot water at 30 ° C. for 30 seconds and then with water (overflow).

Micacion Bill.Orange GS (CIReactive Orange
1) After dyeing in a treatment bath of 5% owf anhydrous sodium sulfate 20g / l soda ash 5g / l (bath ratio 1:20) for 60 minutes at 30 ℃, 80
It was washed with hot water at 30 ° C. for 30 seconds and then with water (overflow).

(2) Soaping These dyed cloths were treated with 0.4g / l of soaping agents shown in Tables 1-4.
Was soaped at 90 ° C. for 10 minutes in a soaping bath (bath ratio 1:30) to which was added. Then, after washing with water and drying, the dyeing fastness was tested.

For comparison, as a known soaping agent, 20 mol of nonylphenol ethylene oxide compound (Comparative Product 1) and sodium salt of polyacrylic acid (molecular weight 5,00
The same dyed cloth was similarly soaped in a soaping bath to which 0.4 g / l of 0) (Comparative product 2) was added.

The dyeing fastness is as follows: (a) Washing test (JIS L-0844 A-3
Method), (b) water test (JIS L-0846 A method), and (c)
Tested on 3 items of hot pressing test (JIS L-0850 A-2 method wet (strong)) and attached (white cotton cloth)
The degree of contamination of the soil was determined by the gray scale method.

The gray scale method displays 5 ranks, and the larger the value, the smaller the pollution degree.

(3) Test result In the case of the polyethylene sulfonic acid salt alone treatment (invention products 1,2,4,5,7,8,10) in the product of the present invention, the foaming property was small during the soaping treatment.

〔effect〕

As described above in detail, the reactive dyeing soaping agent of the present invention has a low foaming property and exhibits an excellent soaping effect even in a small amount, which contributes to labor saving and cost reduction of the soaping step, and also to cellulose fiber products and the like. It greatly contributes to obtaining clear and fast dyed products.

Claims (1)

[Claims] 1. A soaping agent for reactive dyeing, which is polystyrene sulfonic acid and / or a salt thereof and has a weight average molecular weight of 2,000 to 1,500,000.