JPH0362834B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for resist dyeing polyester/cellulose mixed fibers. Specifically, when dyeing polyester/cellulose mixed fibers, the present invention uses a water-insoluble dye that does not have a water-soluble group such as -SO ₃ Na group or -COONa group, but has a specific monofluorotriazinyl type reactive group. Alternatively, it can be applied to dyeing methods that use sparingly water-soluble disperse dyes. By using a special amino compound as a resist dye, polyester/cellulose mixed fibers can be resist dyed white, and various designs and patterns can be easily obtained. Resist dyeing methods for polyester/cellulose mixed fibers have not been widely used due to their technical difficulties. Currently, two types of dyes with different properties are required: disperse dyes for polyester fibers whose dyeing can be prevented by certain resist dyes, and reactive dyes for cellulose fibers. There were technical problems such as difficulty in preparing dyes for each hue due to the presence of dyes, 2 poor reproducibility, and the inability to obtain prints without contamination in white areas. In view of this, the present inventors conducted intensive research and found that polyester/cellulose mixed fibers can be produced by using a poorly water-soluble or water-insoluble reactive disperse dye having a specific reactive group and using a special amino compound as a resist dye. The present invention was achieved by discovering that resist dyeing can be easily performed. That is, the gist of the present invention is the general formula (In the formula, R ¹ represents a hydrogen atom, methyl group or ethyl group, R ² represents a methylene group, ethylene group or trimethylene group, and Me represents an alkali metal.) 3 to 15% by weight of the compound represented by Using a resist dyeing paste that contains and has a PH value of 8 or more, the general formula () that does not have -SO ₃ H group and -COOH group [In the formula, D is a pigment matrix residue, ^R3 is hydrogen or a methyl group, and X is -O-( ^R4 -O) _-nR5 ^{, -OR6} ,
-SR ⁶ or -R ⁶ (in the formula, R ⁴ is an ethylene group or a propylene group, R ⁵ is a methyl group or an ethyl group,
R ⁶ represents an optionally substituted lower alkyl group or aryl group, and m is 1 or 2. )
represents. This is a resist dyeing method characterized by preventing the reactive disperse dye represented by ] from dyeing both fibers of a polyester/cellulose mixed fiber. general formula Specific examples of amino compounds represented by H ₂ N−CH ₂ −SO ₃ Li H ₂ N−C ₂ H ₄ −SO ₃ Na H ₂ N−C ₃ H ₆ −SO ₃ Cs etc. can be mentioned. The amount used is usually 3 to 15% by weight in the resist dyeing paste, and 6 to 12% by weight is particularly preferred. In addition, alkali-resistant sodium alginate, modified CMC-based processed starch, locust bean-based gum, guar gum, etc. are used as the sizing agent for the resist dyeing paste. Furthermore, in addition to the above-mentioned special amino compounds, hygroscopic agents such as ureas and polyethylene glycol derivatives may be added to the resist dyeing paste. The basic substances that make the pH of resist dyeing paste 8 or higher include inorganic basic substances such as alkali metal hydroxides, alkali metal bicarbonates, alkali metal phosphates, alkali metal borates, alkali metal silicates, etc. Examples include organic basic substances such as monoethanolamine, diethanolamine, and pyridine. A particularly desirable pH value is 10-11. The polyester/cellulose mixed fiber used in the present invention includes a blended or woven product of polyester fiber, cationically dyeable polyester fiber, or anionically dyeable polyester fiber and cotton, hemp, viscose silk, or copper ammonium silk. It will be done. In the resist dyeing method of the present invention, −SO ₃ H is used as the dye.
The above general formula () having no group and -COOH group
A poorly water-soluble or water-insoluble dye shown in is used. The matrix structures of such dyes include monoazo, disazo, anthraquinone,
Examples include nitro, stilbene, methine, azamethine, polymethine, perinone, quinophthalone, and naphthoimine. In particular, monoazo-based, disazo-based, and anthraquinone-based ones are preferably used. These dye matrices may also contain heavy metals, if necessary. Specifically, dyes described in JP-A-54-73988, JP-A-55-86839, JP-A-55-92769, JP-A-55-133456, JP-A-55-164250, JP-A-55-151064, etc. can be used. Lower alkyl group represented by the above general formula ()
Examples of R ⁶ include a methyl group, an ethyl group, a linear or branched propyl group, a butyl group, and a pentyl group, and examples of the aryl group include a phenyl group and a naphthalene group. The hydrogen atoms of these groups may be substituted with a halogen atom, a nitro group, a cyano group, a hydroxyl group, an alkyl group or alkoxy group having 1 to 3 carbon atoms, a lower alkoxycarbonyl group having 1 to 3 carbon atoms, or the like. Specific examples of the lower alkoxy group or aryloxy group which may have a substituent represented by ^-OR6 group include methoxy group, ethoxy group, isopropoxy group, n-pentyloxy group, ethoxymethoxy group, β- Chloroethoxy group, phenoxy group,
Examples include p-methylcarbonylphenoxy group, m-nitrophenoxy group, and naphthyloxy group. -SR ⁶ groups include methylthio group, t-
Examples include butylthio group, phenylthio group, m-methoxyphenylthio group, and the like. n is preferably 1
Or 2. A specific method for dyeing polyester/cellulose mixed fibers using a water-insoluble or poorly water-soluble disperse dye having a monofluorotriazinyl type reactive group is already known, for example, in JP-A-54-73988. In order to resist dye a polyester/cellulose mixed fiber by the method of the present invention, (1) After printing the resist dyeing paste on the polyester/cellulose mixed fiber, subsequently or after drying, a method containing a monofluorotriazinyl-type reactive disperse dye is applied. (2) padding a dye liquor containing a monofluorotriazinyl type reactive disperse dye or printing a printing paste, and subsequently or after drying, printing the resist printing paste; , followed by hot air or heated steam at 160℃~220℃
This is carried out by heat treatment for 30 seconds to 10 minutes and washing with hot water containing a surfactant, but method (1) above is particularly preferred. EXAMPLES Hereinafter, the present invention will be explained in more detail with reference to examples, but the present invention is not limited to the following examples unless it exceeds the gist thereof. In addition, "parts" in the examples indicate "parts by weight." Example 1 Table-1 P-2144G (17% aqueous solution) (estimated to be guar gum type manufactured by Nisshin Chemical) 55 parts H ₂ NC ₂ H ₄ So ₃ Na 10 parts Water 25 parts 20% NaOH aqueous solution 10 parts 100 parts (PH=11) A resist dyeing paste (A) having the composition shown in Table 1 above was prepared. separately Dye with the above structure (λmax552nm (acetone)) 15
A dye dispersion was prepared using a paint shaker as a fine dispersion machine. Table 2 Dye dispersion 6 parts 4% sodium alginate aqueous solution 55 parts octaethylene diglycol dimethyl ether
9 parts Sodium bicarbonate 0.05 parts Water 29.45 parts 100 parts Next, a textile dyeing paste (B) having the composition shown in Table 2 was prepared. Add resist dyeing paste (A) to polyester/cotton (mixing ratio 65/
35) A polka dot pattern was printed on a blended fabric, and after intermediate drying at 80°C for 1 minute, printing paste (B) was then overprinted on the entire surface and dry heat fixed at 215°C for 90 seconds.
After washing this product with water, 2 g of sodium carbonate and 2 g of nonionic surfactant (Nicca Chemical Co., Ltd.)
Soaping was carried out at 80°C for 10 minutes using a cleaning solution containing the trademark Lipotol TC300. The obtained printed fabric was of good quality with a bright contrast between white and red. Comparative Example 1 In Example 1, H ₂ NC ₂ H ₄ SO ₃ Na was replaced with HOC ₂ H ₄ SO ₃ Na
When exactly the same operation as described in Example 1 was carried out except that the dye was replaced with , the dye resistance was insufficient. Comparative example 2 H ₂ NC ₂ H ₄ SO ₃ H in Example 1

When exactly the same procedure as described in Example 1 was carried out except that the formula was replaced, the resist dyeing property of the resist dyeing area was insufficient and the color did not become white. Comparative Example 3 Using dye in Example 1 When exactly the same operation as described in Example 1 was carried out except that the color was replaced with , the resist dyeing property of the resist dyeing part was insufficient and the color did not become white. Examples 2 to 5 Amino compounds used in Example 1 are shown in the table below.
Resist dyeing was carried out in the same manner as in Example 1 except that the amino compound shown in Example 3 was used, and a printed fabric with a bright contrast of white in the resist dyed areas and red in the non-resist dyed areas was obtained.

【table】

[Table] Examples 6 to 21 Resist dyeing was carried out in the same manner as in Example 1 except that the dye used in Example 1 was changed to the dye shown in Table 4, and the resist dyed area was white and non-resist dyed. The part is Table 4
A printed cloth with a bright contrast of hues as shown in the figure was obtained. In addition, λmax (acetone) of the dye used in Table 4
shows. However, in Table 4, the Cy group is

[Formula] Group shows.

【table】

【table】

[Table] Example 26 Same as in Example 1, except that the polyester/cotton blend fabric (mixing ratio 65/35) was replaced with a polyester/rayon blend fabric, and the fixing method was replaced with a high-temperature steam fixing method at 185°C for 7 minutes. When a similar operation was carried out according to the method described in Example 1, a printed fabric with a bright contrast of white in the resist-dyed areas and red in the non-resist-dyed areas was obtained.

Claims (1)

[Claims] 1. General formula (In the formula, R ¹ represents a hydrogen atom, methyl group or ethyl group, R ² represents a methylene group, ethylene group or trimethylene group, and Me represents an alkali metal.) 3 to 15% by weight of the compound represented by Using a resist dyeing paste that contains and has a PH value of 8 or more, the general formula does not have -SO ₃ H group and -COOH group. [In the formula, D is a pigment matrix residue, ^R3 is hydrogen or a methyl group, and X is -O-( ^R4 -O) _-nR5 ^{, -OR6} ,
-SR ⁶ or -R ⁶ (in the formula, R ⁴ is an ethylene group or a propylene group, R ⁵ is a methyl group or an ethyl group,
R ⁶ represents an optionally substituted lower alkyl group or aryl group, and m is 1 or 2. )
represents. ] A resist dyeing method characterized by preventing dyeing of both fibers of a polyester/cellulose mixed fiber with a reactive disperse dye represented by the formula.