JPS61239090A - Soaping agent of cellulosic fiber 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 [Industrial Field of Application] The present invention relates to a soaping agent for dyed cellulose fibers.

[Conventional technology and its problems]

When dyeing cellulose fibers and textile products such as blended products, replacement products, and knitted and knitted products containing cellulose fibers, cellulose fibers can be dyed using direct dyes, reactive dyes, vat dyes, sulfur dyes, etc. using the exhaust method, continuous dyeing method, or It is dyed using the textile printing method. After dyeing, these dyed products are soaped in order to remove unfixed dyes or cross-contaminating dyes without contaminating the hot water and to obtain dyed products with bright and fast hues.

In general, soap, anionic surfactants such as higher alcohol sulfates, polyoxyalkylene alkyl ethers, polyoxyalkylene allyl ethers, and dialkylene alkyl allyl ethers in polio are used to enhance the soaping effect of dyed cellulose fibers. Nonionic surfactants and mixtures of these anionic and nonionic surfactants are used as soaping agents, particularly soaps and their formulations.

However, with these soaping agents, no effective method has been found to sufficiently remove unfixed dye and prevent redeposition to prevent hot water contamination. Therefore, for dark colors, soaping and dipping must be repeated two or three times. The current situation is that It is true that repeated soaping and hot water washing is effective in removing unfixed dyes, but it is not a big burden on wastewater treatment, and it is also undesirable from the viewpoint of productivity, energy saving, and resource saving〇Recently, In the dyeing industry, when soaping dyed cellulose fibers, it is possible to reduce the number of soaping and hot water washes, sufficiently remove unfixed dye, and obtain clear and durable dyed products without contaminating hot water. The appearance of soaping agents was strongly desired. The reason for this is that reducing the number of times of soaping and hot water washing is expected to improve productivity, save resources and energy, and reduce wastewater load.

[Means for solving problems]

As a result of intensive studies to obtain a soaping agent for dyed cellulose fibers as described above, the present inventor found that a vinyl polymer having a pyrrolidone skeleton is suitable for the above purpose, and that by soaping with these, it is possible to prevent fixation. The present invention was achieved by discovering that a vivid and durable dyed product can be obtained by removing the dye and at the same time preventing the redeposition of the dye that has once fallen off.

That is, the present invention provides a soaping agent for dyed cellulose fibers containing a vinyl polymer having a pyrrolidone skeleton as an essential component.

In the present invention, the vinyl polymer having a pyrrolidone skeleton includes not only polyvinylpyrrolidone obtained by polymerizing vinylpyrrolidone, but also copolymers of vinylpyrrolidone and other monomers having a vinyl group.

That is, the vinyl polymer having a pyrrolidone skeleton, which is an essential component of the present invention, can be easily produced by polymerizing or copolymerizing vinylpyrrolidone by a known method.

The vinylpyrrolidone polymer has a skeleton represented by the following formula. The molecular weight is 2,000 to 2,000,000, preferably 5,000 to 500,000.

+CH2-? TI+n copolymers can be easily produced by copolymerizing vinylpyrrolidone and other monomers. The degree of copolymerization may be within a range that does not impair the intended effects of the present invention. Examples of copolymerization partners include acrylic acid, methacrylic acid, maleic acid salts, 7-maric acid, maleic anhydride, vinyl alcohol, acrylamide, methacrylamide, diacetone acrylamide, 2-acrylamide, 2-methylpropanesulfonic acid, and methacrylic acid. Monomers such as allyl sulfonic acid, styrene sulfonic acid, and vinyl acetate are used.

The soaping agent according to the invention shows a high affinity for dyes. It is important that the polymer be a linear polymer that has a pyrrolidone skeleton and has a relatively large molecular weight. Polyacrylamide, polymethacrylamide, etc., which are the same linear polymers but do not have a pyrrolidone skeleton, are not preferred because they have a small effect of removing unfixed dyes and preventing hot water from contaminating. Furthermore, it is important that the molecular weight is large; a low molecular weight is not preferable because the effect of removing unfixed dye and preventing the staining of hot water is small.

On the other hand, if it is too large, the thickening effect will be significant, which is not practical. In addition, in the copolymer, it is preferable that the copolymerization ratio of vinylpyrrolidone is 30 mol% or more; if it is less than that, the effect of removing unfixed dye and preventing hot water stains will be small, reducing the number of times of soaping and hot water washing. This is not desirable because it cannot be done.

The amount of the soaping agent of the present invention used is not particularly limited, but
o as a soaping bath, os 274 or more preferably 0
．． 2 f/J~1. It is preferable to use it by adjusting it to ot/l. The soaping agent of the present invention also contains formalin condensates of naphthalene sulfonic acid, polyacrylates,
7-ionic surfactants such as copolymers of acrylates and maleates, soaps, alkyl sulfates, polyoxyalkylene ether sulfates, sodium alkylbenzenesulfonates, or dialkylene-based nonionic surfactants in polio. They can also be used together.

〔Example〕

Hereinafter, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to the following unless it exceeds the gist thereof.

Example-1 Kayasion Red 1 cotton broadcloth (40 mm)
Create a test cloth dyed with li-85B, 5% Owf,
This fabric was washed at 80° C. for 20 minutes in a soaping bath (bath ratio 1:20) containing the soaping agents o and st/lp of the present invention and multi-fiber to examine the effect of preventing hot water stains. After washing, it was washed with water for 2 minutes and dried. Next, the contamination state of the unfixed dye that fell off during cleaning on the Multi-7 Eyeper was measured using a gray scale for contamination (J Eng Ill I, 0
805) to determine the effect of preventing hot water pollution.

For comparison, I tested 1. with other soaping agents alone. The results when using wax are also listed 0 The results are consistent with those in Table 1 0 Table 1 Invention product 1 Polyvinylpyrrolidone MY 1000
01 2 Polyvinylpyrrolidone I 4000
01 5 Polyvinylpyrrolidone I 10000
0I 4 Vinylpyrrolidone:vinyl acetate = 7:3 copolymer comparative product 1 Beef tallow soap 1 2 Ethylene oxide of nonylphenol 2
Judgment by the gray scale method is based on a 5-rank rating, and the higher the value, the lower the degree of contamination. Shows excellent white water stain prevention effect with a small amount added compared to when soaping agents are used.

Example 2 Using the washed dyed cloth obtained in Example 1, the sweat fastness (acidic sweat fastness, alkaline sweat fastness) was examined based on J Engineering SL 0888. Judgment was made using gray scale.

The results were as shown in Table 2.3.

Table 5 As is clear from Table 2.5 above, the soaping agent of the present invention exhibits excellent sweat fastness when added in a small amount compared to known soaping agents in terms of the fastness of dyed products.

Example 5 A polyester/cotton (SO150) blend fabric was treated with dye A.
After dyeing at 30° C. for 50 minutes, it was cooled and dyed with dye B at 50° C. for 60 minutes in two steps.

This was mixed with the same soaping agent as in Example 1, 0°5t/! Washing was carried out at 80° C. for 20 minutes in a soaping bath (bath ratio 1:20) containing White water contamination was investigated by adding white cloth of the same quality to the soaping bath, and water fastness was investigated based on TIS L-0846 using the dyed product after washing. Judgment was made using gray scale. For comparison, a known soaping agent was used with a diameter of 0.5φ. The results were as shown in Table 4.

A. Kayalon Polyester Lig
ht Red Be 2%Owf dispersion and leveling agent (Repenol TD-326) 0.2% acetic acid (80%)
a, 5ILVJB, Diamira Bri
'1liant Red BB 2%Owf Glauber's Salt
5Q 1no soda ash
10 ψ As is clear from Table 4 above, the soaping agent of the present invention exhibits an excellent hot water stain prevention effect and excellent water stiffness even when added in a small amount compared to known soaping agents.

〔Effect of the invention〕

The soaping agent of the present invention is a blended product containing cellulose fibers,
After dyeing textile products such as replacement products and mixed woven fabrics with dyes containing reactive dyes, this method removes unfixed dyes (after soaping), prevents cross-contamination of dyes, and produces vivid and durable dyed products. Obtainable. With the advent of such an excellent soaping agent, it is possible to reduce the number of times of soaping and hot water washing, and it is expected to save resources and energy by improving productivity, or reduce the waste water load. Furthermore, the soaping agent of the present invention has lower foaming properties than conventional soaping agents, and is effective in improving workability.

The present invention is characterized in that, among various vinyl polymers, vinyl polymers having a pyrrolidone skeleton are used exclusively as soaping agents for dyed cellulose fiber products. By limiting the basic framework and using it in this way, we can significantly increase the effect of removing unfixed dyes or preventing cross-contamination of dyes in soaping dyed cellulose fiber products, which has not been possible in the past. This made it possible to obtain clear and durable dyed products. As shown in the examples, this effect cannot be achieved with known soaping agents. For example, in Examples 1 and 3, the evaluation results of the hot water pollution prevention effect are shown for the soaping agent according to the present invention as well as for the known soaping agent such as soap and hypolyoxyethylene nonylphenyl ether. Both the results shown and the known soaping agents show that the soaping agent of the present invention has a superior effect on preventing hot water stains. Further, the soaping agent according to the present invention exhibits an additional effect of providing dyed products with excellent fastness, in addition to being highly effective in preventing hot water stains. In Examples 2 and 3, the fastness of dyed products was evaluated when a nyl polymer having a pyrrolidone skeleton according to the present invention was used as a soaping agent together with a known soaping agent. This also shows that the vinyl polymer having a pyrrolidone skeleton according to the present invention can produce dyed products with excellent fastness.

Claims (1)

[Scope of Claims] 1. A soaping agent for dyed cellulose fibers, characterized in that it contains a vinyl polymer having a pyrrolidone skeleton as an essential component. 2. The soaping agent for dyed cellulose fibers according to claim 1, wherein the vinyl polymer having a pyrrolidone skeleton is a polymer of vinylpyrrolidone or a copolymer of vinylpyrrolidone and another vinyl monomer.