WO2006111567A2

WO2006111567A2 - Method for dyeing polyester-containing textile with dispersed dye

Info

Publication number: WO2006111567A2
Application number: PCT/EP2006/061717
Authority: WO
Inventors: Karl Siemensmeyer; Heinz Heissler; Timo Osswald
Original assignee: Basf Aktiengesellschaft
Priority date: 2005-04-22
Filing date: 2006-04-20
Publication date: 2006-10-26
Also published as: DE102005018932A1; CN101163830A; EP1874994A2; TW200702519A; WO2006111567A3

Abstract

Disclosed is a method for dyeing polyester-containing textile material with one or several dispersed dyes. Said method is characterized in that undyed polyester-containing textile material is treated with an aqueous liquor containing (a) at least one dispersed dye, (b) at least one compound of general formula (Ia) or (Ib), wherein the variables are defined as follows: R1 is selected among hydrogen, phenyl, and C1-C10 alkyl; R2 is identical or different and is selected among hydrogen, phenyl, and C1-C10 alkyl; AO represents alkylene oxide; EO represents ethylene oxide; a is identical or different and is selected among numbers ranging from 0 to 150; b is identical or different and is selected among numbers ranging from 15 to 250, with the provision that b ≥ a; d is identical or different and is selected among zero and one; f is identical or different and is selected among numbers ranging from 15 to 35; and M is identical or different and is selected among alkali metals.

Description

Process for dyeing polyester-containing textile with disperse dye

The present invention relates to a process for dyeing polyester-containing textile with one or more disperse dyes, characterized in that undyed polyester-containing textile treated with an aqueous liquor containing

(a) at least one disperse dye,

(B) at least one compound of general formula I a or I b

where the variables are defined as follows:

R ^{1 is} selected from hydrogen, phenyl and C ₁ -C ₁₀ -alkyl,

R ^{2 is} identical or different and selected from hydrogen, phenyl and C 1 -C ₁₀ -alkyl,

AO is alkylene oxide,

EO is ethylene oxide, C ₂ H ₄ O, a is the same or different and selected from numbers ranging from O to 150, b are the same or different and selected from numbers in the range of 15 to 250, where b ≥ a, d are the same or different and selected from zero and one, f is the same or different and selected from numbers in the range of 15 to 35, M is the same or different and selected from alkali metals. When dyeing with disperse dyes, textile, preferably polyester-containing textile, is treated with at least one disperse dye. Disperse dyes are usually schiecht soluble in water or aqueous medium, but dissolve molecularly dispersed in polyester. Dyeing with disperse dyes is usually carried out at acidic pH.

Following the actual dyeing, a so-called reductive final purification is carried out by reductively removing disperse dye or decomposition products of disperse dye not dissolved in the fiber with one or more reducing agents.

Frequently, however, it is observed that the coloration is not as brilliant as desired. This is especially the case if one does not work under alkaline conditions, i. when dyed at acidic pH and post-treated reductively, for example with sulfinic or sulfinic. In the cases mentioned above, it is observed that a gray haze forms, which is difficult or impossible to remove under the conditions mentioned and can cause problems in further processing, for example due to undesired dusting and needle wear during assembly.

As has been shown, the gray haze described above is due to the formation of polyester oligomers. Polyesters, which are usually prepared by polycondensation of at least one diol and at least one dicarboxylic acid, may contain up to 5, usually up to 2 wt .-% low molecular weight condensates of diol and dicarboxylic acid, for example cyclic dimers and trimers of (diol + dicarboxylic acid ), Dicarboxylic acid monodiolester and dicarboxylic acid diester. In the case of polyesters prepared from terephthalic acid and ethylene glycol, it is therefore possible to detect, for example, cyclic dimers and trimers of (terephthalic acid + ethylene glycol) and also terephthalic acid monoglycol ester and terephthalic acid diglycol ester. cyclic dimer of (terephthalic acid + ethylene glycol)

Under alkaline conditions, you no longer like to dye because you have to accept considerable wastewater pollution and continue to damage the fibers. Moreover, one is limited in the choice of dyes.

It was therefore the object to provide a process for dyeing with disperse dyes, which avoids the disadvantages mentioned above. A further object was to provide disperse dyed textii having particularly brilliant coloration.

Accordingly, the method defined above was found.

Under Textii are one, two or three-dimensional substrates to understand, for example, fibers, yarns, threads, knitted fabric, woven, non-wovens and made-up goods made of polyester-containing material, ie polyester or modified polyester, polyester microfibers, polyester blends of Polyester with natural fibers such as cotton, linen or silk or mixtures of polyester with modified cellulose fibers such as viscose or with synthetic see fibers such as polyester / polyurethane blends (eg Lycra®).

According to the invention, undyed polyester-containing textile is dyed with one or more disperse dyes.

For carrying out the process according to the invention, polyester-containing textii is treated with an aqueous liquor containing

(a) at least one disperse dye and

(B) at least one compound of general formula I a or I b. Suitable disperse dyes (a) are sometimes also referred to as disperse dyes and are in particular azo, anthraquinone, quinophthalone, benzodifuran, methine and azamethine dyes, which are free of acidic or ionic groups. In the context of the present invention, the term disperse dyes (a) also encompasses the dye class of the solvent dyes and the class of optical brighteners.

Specific examples of suitable disperse dyes (a) are in detail:

Cl. Disperse Yellow 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 11: 1, 12, 13, 14, 15, 16, 17, 18, 19,

20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 179, 180, 181, 182, 183, 184, 184: 1, 198, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227 and 228;

Cl. Disperse Orange 1, 2, 3, 3, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 25: 1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 41: 1, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 126, 127, 128, 129, 130, 131, 136, 137, 138, 139, 140, 141, 142, 143, 145, 146, 147 and 148;

Cl. Disperse Red 1, 2, 3, 4, 5, 5, 1, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20,

21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 30: 1, 31, 32, 33, 34, 35, 36, 38, 39, 40, 41, 43, 43: 1, 46, 48, 50, 51, 52, 53, 54, 55, 55: 1, 56, 58, 59, 60, 61, 63, 65, 66, 69, 70, 72, 73, 74, 75, 76, 77, 79, 80, 81, 82, 84, 85, 86, 86: 1, 87, 88, 89, 90, 91, 92, 93, 94, 96, 97, 98, 100, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 115, 116, 117, 118, 120, 121, 122, 123, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 151: 1, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 167: 1, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 190: 1, 191, 191: 1, 192, 193, 194, 195, 211, 223, 224, 273, 274, 275, 276, 277, 278, 279, 280, 281, 302: 1, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314, 315, 316, 317, 318, 319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329, 330, 331, 332, 333, 334, 335, 336, 338, 339, 340, 341, 342, 343, 344, 346, 347, 348, 349, 352, 356 and 367;

Cl. Disperse Violet 1, 2, 3, 4, 4: 1.5, 6.7, 8.9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 31, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 70, 81, 86, 87, 88, 89, 91, 92, 93, 94, 96 and 97;

Cl. Disperse Blue 1, 1: 1, 2, 3, 3: 1, 4, 5, 6, 7, 7: 1, 8, 9, 10, 11, 12, 13, 13: 1, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 23: 1, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 38, 39, 40, 42, 43, 44, 45, 47, 48, 49, 51, 52, 53, 54, 55, 56, 58, 60, 60: 1, 61, 62, 63, 64, 64: 1, 65, 66, 68, 70, 72, 73, 75, 76, 77, 79, 80, 81, 81: 1, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 111, 112, 113, 114, 115, 116, 117, 118, 119, 121, 122, 123, 124, 125, 126, 127, 128, 130, 131, 132, 133, 134, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 158, 159, 160, 161, 162, 163, 164, 165, 165: 2, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 195, 281, 282, 283,

283: 1, 284, 285, 286, 287, 288, 289, 290, 291, 292, 293, 294, 316, 317, 318, 319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329, 330, 331, 332, 333, 334, 335, 336, 337, 338, 339, 340, 341, 342, 343, 344, 345, 346, 347, 349, 351 and 359;

Cl. Disperse Green 1, 2, 5, 6 and 9;

Cl. Disperse Brown 1,2,3,4,4: 1,5,7,8, 9, 10, 11, 18, 19, 20 and 21;

Cl. Disperse Black 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 20, 22, 24, 25, 26, 27, 28, 29, 29: 1, 30, 31, 32, 33, 34 and 36;

Cl. Solvent Yellow 2, 3, 7, 12, 13, 14, 16, 18, 19, 21, 25, 25: 1, 27, 28, 29, 30, 33, 34, 36, 42, 43, 44, 47, 56, 62, 72, 73, 77, 79, 81, 82, 83, 83: 1, 88, 89, 90, 93, 94, 96, 98, 104, 107, 114, 116, 117, 124, 130, 131, 133, 135, 141, 143, 144, 145, 146, 157, 160: 1, 161, 162, 163, 167, 169, 172, 173, 176, 179, 180, 181, 182, 183, 184, 185, 186, 187, 189, 190 and 191;

Cl. Solvent Orange 1, 2, 3, 4, 5, 7, 11, 14, 20, 23, 25, 31 A, 40: 1, 41, 45, 54, 56, 58, 60, 62, 63, 70, 75 , 77, 80, 81, 86, 99, 102, 103, 105, 106, 107, 108, 109, 110, 111, 112 and 113;

Cl. Solvent Red 1, 2, 3, 4, 8, 16, 17, 18, 19, 23, 24, 25, 26, 27, 30, 33, 35, 41, 42, 45, 48, 49, 52, 68, 69, 72, 73, 83: 1, 84: 1, 89, 90, 90: 1, 91, 92, 106, 109, 111, 118, 119, 122, 124, 125, 127, 130, 132, 135, 141, 143, 145, 146, 149, 150, 151, 155, 160, 161, 164, 164: 1, 165, 166, 168, 169, 172, 175, 179, 180, 181, 182, 195, 196, 197, 198, 207, 208, 210, 212, 214, 215, 218, 222, 223, 225, 227, 229, 230, 233, 234, 235, 236, 238, 239, 240, 241, 242, 243, 244, 245, 247 and 248;

Cl. Solvent Violet 2, 8, 9, 11, 13, 14, 21, 21: 1, 26, 31, 36, 37, 38, 45, 46, 47, 48, 49, 50, 51, 55, 56, 57, 58, 59, 60 and 61;

Cl. Solvent Blue 2, 3, 4, 5, 7, 18, 25, 26, 35, 36, 37, 38, 43, 44, 45, 48, 51, 58, 59, 59: 1, 63, 64, 67, 68, 69, 70, 78, 79, 83, 94, 97, 98, 99, 100, 101, 102, 104, 105, 111, 112, 122, 124, 128, 129, 132, 136, 137, 138, 139 and 143;

Cl. Fluorescent Brightener 1, 9, 14, 17, 20, 22, 24, 28, 28: 1, 30, 32, 37, 46, 47, 49, 52, 54, 59, 61, 71, 79, 84, 85 , 86, 87, 90, 90: 1, 91, 104, 113, 114, 117, 119, 121, 123, 124, 130, 132, 134, 135, 136, 140, 144, 145, 146, 147, 148 , 152, 153, 154, 162: 1, 166, 167, 169, 170, 171, 173, 175, 176, 177, 179, 184, 184: 1, 184: 2, 185, 185: 1, 185: 2 , 190, 191, 192, 194, 195, 196, 199, 200, 205, 210, 216, 217, 217: 1, 218, 219, 219: 1, 220, 222, 223, 224, 225, 226, 228, 229 , 230, 231, 232, 234, 235, 236, 238, 239, 241, 242, 251, 252, 254, 257, 258, 261, 262, 263, 264, 265, 266, 267, 269, 271, 27.2 273 274 275 276 277 278 279 280 289 290 291 310 311 312 313 314 315 318 321 322 326 327 328 330 332 , 335, 336, 337, 338, 339, 340, 351, 352, 353, 354, 355, 357, 362, 363, 364, 365, 366, 367, 368, 369, 370, 371, 372, 373, 374 , 374: 1, 375, 376, 377, 378, 379, 380, 381, 382, 383, 384, 385, 386, 387 and 388. Furthermore, the liquor used to carry out the process according to the invention contains at least one compound of the general formula I a or I b,

where the variables are defined as follows:

R ¹ selected from hydrogen, phenyl and C ¹ -C 10 -alkyl, branched or unbranched, such as methyl, ethyl, n-propyl, iso-

Propyl, n-butyl, iso-butyl, sec-butyl, tert-butyl, n-pentyl, iso-pentyl, sec-pentyl, neo-pentyl, 1, 2-dimethylpropyl, iso-amyl, n-hexyl, Iso-hexyl, seα-hexyl, n-heptyl, n-octyl, 2-ethylhexyl, n-nonyl, n-decyl, particularly preferably Ci-C ₄ alkyl such as methyl, ethyl, n-propyl, n-butyl and in particular isopropyl,

R ^{2 is the} same or different and selected from hydrogen, phenyl and

C 1 -C ₁₀ -alkyl, branched or unbranched, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, n-pentyl, isopentyl, sec-pentyl, neo-pentyl, 1, 2-dimethylpropyl, iso-amyl, n-hexyl, iso-hexyl, sec-hexyl, n-heptyl, n-octyl, 2-ethylhexyl, n-nonyl, n-decyl, particularly preferred

C _r C ₄ alkyl such as methyl, ethyl, n-propyl, n-butyl, and especially methyl or ethyl, AO is alkylene oxide, identical or different, preferably C ₃ -C ₅ -alkylene oxide, for example butylene oxide, pentylene oxide and in particular propylene oxide (C ₃ H ₆ O),

EO is ethylene oxide, (CH ₂ CH ₂ O),

a is different or preferably the same and selected from numbers in the range from 0 to 150, preferably up to 20, where a as the mean (number average) may also be a non-integer number,

b is different or preferably the same and selected from numbers in the range from 15 to 250, preferably 20 to 200 and particularly preferably to 35, where b as average (number average) can also be a non-integer number,

where b ≥ a,

d is the same or different and chosen from zero and one,

f is the same or different and chosen from numbers in the range of 15 to 35, preferably 20 to 30, where f as the mean (number average) is also a non-whole

Number can be

M is the same or different and selected from alkali metals, for example lithium,

Cesium, rubidium and preferably sodium and potassium.

The process according to the invention can be carried out continuously or batchwise.

In one embodiment of the present invention, the process according to the invention is carried out at a liquor length in the range from 1: 2 to 1:50, preferably from 1: 3 to 1:20. In one embodiment of the present invention, the inventive method is carried out at a temperature ranging from 70 to 150 ⁰ C, preferably at least 90 ⁰ C, particularly preferably 110 to 15O ⁰ C.

In one embodiment of the present invention, the process according to the invention is carried out at a pH in the range from 3 to 7, preferably 4 to 5.

The process according to the invention can be carried out, for example, under atmospheric pressure, but preferably under elevated pressure, for example the vapor pressure of water, which sets in the process according to the invention.

In one embodiment of the present invention, liquors used in the process according to the invention contain

(a) in the range of 0.0001 to 10 wt .-%, preferably to 0.1 to 6 wt .-% disperse dye and

(b) in the range from 0.5 to 10% by weight, preferably up to 5% by weight, particularly preferably 1 to 3% by weight of compound of the general formula I a or I b,

in each case based on polyester-containing textile to be dyed.

In one embodiment of the present invention, the process according to the invention can be carried out as an exhaustion process, for example by dyeing in a dyeing apparatus or a dyeing bomb.

In another embodiment of the present invention, the process according to the invention can be carried out with the aid of a padder. Foulards can be operated by methods known per se. For example, it is possible to choose application speeds in the range from 0.1 to 10 m / min, preferably from 1 to 5 m / min, and a contact pressure of the rolls in the range from 0.5 to 4 bar, preferably from 1 to 3 bar. In one embodiment of the present invention, one or more adjuvants may be used to carry out the process according to the invention, for example leveling agents, fiber-protecting agents, one or more acids such as, for example, mono- or dicarboxylic acids, in particular formic acid, acetic acid, succinic acid, adipic acid, glutaric acid and mixtures of above acids, further acidity regulators / buffers and / or sequestering agents.

In one embodiment of the present invention, does not allow the liquor in the dyeing apparatus or not substantially cool, but they can still hot, examples play, with a temperature in the range of 80 to 15O ⁰ C in the dyeing machine from.

When carrying out the process according to the invention, it is observed that deposits of polyester oligomers and thus gray veils on dyed textile do not form or do not form to any significant extent.

Another object of the present invention are aqueous liquors containing

(a) at least one disperse dye and (b) at least one compound of general formula I a or I b

where the variables are as defined above.

Aqueous liquors of the invention are obtainable, for example, by mixing water with (a) one or more disperse dyes and (b) one or more compounds of general formula I a or I b.

The order of addition of one or more disperse dyes (a) and (b) of one or more compounds of general formula I a or I b to water per se is not critical. For example, one may add (a) one or more disperse dyes and (b) one or more compounds of general formula Ia or Ib together or preferably separately to water and mix together.

In one embodiment of the present invention, one or more acids, for example one or more mono- or dicarboxylic acids, in particular formic acid, acetic acid, succinic acid, adipic acid, glutaric acid and mixtures of the abovementioned acids, can be added for the preparation of aqueous liquors according to the invention. Suitable amounts of acid may be, for example, 1 to 5 g / l of liquor according to the invention.

In one embodiment of the present invention, liquors of the invention may have a pH in the range from 4 to 5, preferably 4 to 4.5, with special dyes, a pH in the range from 4.5 to 5 may be preferred.

The preparation of compounds of the general formula Ia and Ib is known per se and is achieved, for example, by reacting phenols of the general formula IIa

or bisphenols of the general formula II b

in which the variables are as defined above, with 2, 3 or 4 equivalents of styrene in the presence of acidic catalyst, preferably Lewis acid. Thereafter, it is reacted with optionally with alkylene oxide, in particular with C ₃ -C ₅ -alkylene oxide, and then with ethylene oxide, for example in the presence of acidic or basic catalyst. If it is desired to prepare those compounds of the general formula I a or I b in which a = 0, the reaction is immediately carried out with ethylene oxide and the reaction is omitted with alkylene oxide, for example C ₃ -C ₅ -alkylene oxide. Thereafter, it is possible to completely or partially sulphate, for example with sulphating reagents, in particular sulfur trioxide or chlorosulphonic acid, and then neutralize them partially or completely with alkali metal hydroxide. However, it is also possible to dispense with a reaction with sulfating reagent.

The invention will be explained by working examples.

I. Test for Dispersion of Polyester Oligomers:

A solution of 10 g / l of a mixture of polyester oligomers, obtainable from deposits from a dyeing apparatus, in N-methylpyrrolidone was prepared. The composition of the mixture of polyester oligomers was determined by gas chromatography as follows:

Cyclic trimer: 1, 0% by weight Cyclic dimer: 11.2% by weight of terephthalic acid monoglycol ester: 47.4% by weight of terephthalic acid diglycol ester: 15.4% by weight of terephthalic acid monomethyl-ethylene glycol ester (see below): 17.4% by weight

residual 7.6 wt .-%: about 20 different unidentified substances, individual content in each case below 0.2 wt .-%.

1 ml of the thus prepared solution of polyester oligomers was added to an aqueous liquor which further contained:

2 g acetic acid acetate buffer 1 g compound of formula I a.1,

and filled with water to one liter.

Was charged with the polyester oligomer containing liquor thus prepared in a dyeing bomb, heated for 30 minutes at 130 ⁰ C in the closed dyeing bomb and then cooled over a period of 45 minutes at 40 ⁰ C.. Thereafter, the aqueous liquor was filtered through a black dyed polyester knitted fabric (basis weight: 80 g / m ² ) and evaluated visually the filter residue. The results are summarized in Table 1.

In this case, Compound I a.1 was replaced in each case as follows for Comparative Experiments V2 to V6:

V2: 1 g of an aqueous mixture containing 15% by weight of naphthalenesulfonic acid-formaldehyde condensate, M _w 16,000 g / mol 15% by weight of castor oil ethoxylate (average 47 equivalents ethylene oxide / mole) 14% by weight oleic acid ethoxylate (average 5 equivalents ethylene oxide / mole) 6% by weight ethoxylated n-hexanol (3 equivalents ethylene oxide / mole)

V3: 1 g of an aqueous mixture containing

14.5% by weight of naphthalenesulfonic acid / formaldehyde condensate, M _w 6000 47.5% by weight of oleic acid ethoxylate (average 5 equivalents of ethylene oxide / mole) of 23% by weight of dipropylene glycol

V4: 1 g of oleic acid ethoxylate (average 5 equivalents of ethylene oxide / mol)

V5: Compound I a.1 was omitted without substitution

V6: Compound I a.1 was omitted without substitution. The acetic acid acetate buffer was replaced by 1 g / l naphthalenesulfonic acid-formaldehyde condensate (M _w 6000 g / mol) and 2 g / l diethanolamine.

Table 1: Test results

II. Dyeing Examples

Examples in wt .-% refer in the following each on polyester yarn, unless expressly stated otherwise.

11.1 Inventive example

In a laboratory dyeing machine, a polyester yarn (2 kg, on a spool) was repeatedly dyed with a liquor according to the invention containing 0.5% by weight of Cl. Disperse Blue 165 5 ml / l Acetic acid sodium acetate buffer (pH 4.0) 0.5% by weight Oleic acid ethoxylate (average 47 equivalents EO / mole) 0.5% by weight Compound of formula I a. 1

For this purpose, a coil with polyester yarn in a laboratory dyeing apparatus (Fa. Then) was set in each case containing a warmed to 70 ⁰ C liquor (liquor ratio 1: 10). The dyeing bomb was sealed and heated at a heating rate of 2 ° C / min to a temperature of 130 ⁰ C. It was left for 30 minutes at 130 ⁰ C and then cooled at a rate of 2 ° C / min to 75 ° C from. The dyebomb was opened, the spent liquor was drained, the bobbin was dyed with polyester yarn, fresh liquor was added without further purification or rinse steps, assembled as described above, and a new (uncolored) polyester yarn bobbin was inserted.

After dyeing, the freshly dyed coils were each dried with warm air. Even after 20 dyeing cycles, no oligomer deposits were observed on the dyed polyester yarn.

II.2 comparative experiment

The dyeing according to Example 11.1 was repeated, but Compound I a.1 was replaced by the same amount of naphthalenesulfonic acid-formaldehyde condensate, M _w 16,000 g / mol. In the comparative experiment deposits of polyester oligomers were visible as a gray veil on the blue-colored coil after 8 dyeing cycles with the eye.

Claims

claims

1. A process for dyeing polyester-containing textile with one or more disperse dyes, characterized in that uncolored polyester-containing textile treated with an aqueous liquor containing

(a) at least one disperse dye and

(B) at least one compound of general formula I a or I b

where the variables are defined as follows:

R ¹ is selected from hydrogen, phenyl and C ₁ -C ₀ -alkyl,

R ^{2 is the} same or different and selected from hydrogen, phenyl and C ₁ -

C ₁₀ -alkyl,

AO is alkylene oxide, EO is ethylene oxide, a is the same or different and selected from numbers ranging from O to

150, b are the same or different and selected from numbers in the range of 15 to

250, where b ≥ a, d are the same or different and selected from zero and one, f is the same or different and chosen from numbers in the range of 15 to

35, M are the same or different and selected from alkali metals.

2. The method according to claim 1, characterized in that in the formula Ia or Ib the variables are defined as follows:

AO selected from propylene oxide, a the same or different and selected from numbers in the range of 0 to 20 b, the same or different and selected from numbers in the range of 20 to

200, f are the same or different and chosen from numbers in the range of 20 to

30

M selected from sodium and potassium.

3. The method according to any one of claims 1 to 2, characterized in that one uses 10 to 80 wt .-% compound of the general formula I a or I b, based on disperse dye (a).

4. The method according to any one of claims 1 to 3, characterized in that one operates at a temperature in the range of 110 to 150 ⁰ C.

5. The method according to any one of claims 1 to 4, characterized in that in

Formula I b the variables are defined as follows:

a null, b the same or different and selected from numbers in the range of 20 to

35,

Each R ² is the same and methyl, M is selected from sodium and potassium.

6. Aqueous liquor containing

(a) at least one disperse dye and

(B) at least one compound of general formula I a or I b

where the variables are defined as follows:

R ¹ is selected from hydrogen, phenyl and CRCI _O -alkyl,

R ^{2 is the} same or different and selected from hydrogen, phenyl and C ₁ -

C ₁₀ -alkyl,

250, where b ≥ a, d are the same or different and are selected from zero and one, f are the same or different and are selected from numbers in the range of 15 to

35, M are the same or different and selected from alkali metals.

7. Aqueous liquor according to claim 6, characterized in that in the formula I a or I b the variables are defined as follows:

200

M selected from sodium and potassium.

8. Aqueous liquor according to one of claims 6 or 7, characterized in that in formula I b the variables are defined as follows:

a null, b the same or different and selected from numbers in the range of 20 to

35,

Each R ² is the same and methyl, M is selected from sodium and potassium.