Phenyl acothienylthiazoaniline dis-azo dye for polyester fibers

Abstract

A dis-azo dye for polyester fibers represented by the formula ##STR1## wherein Y is hydrogen or acetylamino and R.sup.1 and R.sup.2 are each C.sub.1 -C.sub.4 alkyl, cyanoethyl, acetoxyethyl or C.sub.1 -C.sub.4 alkoxyethyl.

Description

FIELD OF THE INVENTION

The present invention relates to a dis-azo dye for polyester fibers. The dye of the present invention provides polyester fiber with a color in the range of from navy blue to green. It is also capable of dyeing polyester fibers black by itself. It has great color fastness to light, sublimation and water, as well as high stability to temperature and pH changes during dyeing.

SUMMARY OF THE INVENTION

The dis-azo dye for polyester fibers of the present invention has the formula (I): ##STR2## wherein D is a substituted or unsubstituted phenyl group, a substituted or unsubstituted pyridyl group, or a substituted or unsubstituted thiazolyl group; X is a hydrogen atom, chlorine atom, bromine atom or an acetyl group; Y is a hydrogen atom, chlorine atom, bromine atom, methyl group or acylamino group; Z is a hydrogen atom, chlorine atom, methyl group, methoxy group or ethoxy group; R.sup.1 and R.sup.2 are each a hydrogen atom, a substituted or unsubstituted alkyl group, a cyclohexyl group, alkenyl group, or aryl group.

DETAILED DESCRIPTION OF THE INVENTION

Specific examples of D in the formula (I) are as follows: a phenyl group; a phenyl group substituted by a fluorine atom, chlorine atom, bromine atom, methyl group, ethyl group, trifluoromethyl group, methoxy group, ethoxy group, phenylazo group, cyano group, nitro group, methylsulfonyl group, ethylsulfonyl group, allylsulfonyl group, lower alkoxycarbonyl group, lower alkoxyethoxycarbonyl group, allyloxyethoxycarbonyl group, mono-lower alkylaminocarbonyl group, di-lower alkylaminocarbonyl group, diallylaminocarbonyl group, mono-allylaminocarbonyl group, dimethylaminosulfonyl group, diethylaminosulfonyl group, monomethylaminosulfonyl group, monoethylaminosulfonyl group, acetyl group or phenyl group; a pyridyl group; a pyridyl group substituted by a chlorine atom, bromine atom, nitro group, methyl group, methylsulfonyl group or cyano group; a thiazolyl group; and a thiazolyl group substituted by a methyl group, chlorine atom, bromine atom, nitro group, lower alkoxycarbonyl group, methoxyethoxycarbonyl group, ethoxyethoxycarbonyl group, trifluoromethyl group or methylsulfonyl group. Examples of the acylamino group represented by Y include an acetylamino group, chloroacetylamino group, benzoylamino group, methylsulfonylamino group, chloropropionylamino group, ethoxycarbonylamino group and ethylaminocarbonylamino group. Examples of the unsubstituted alkyl group represented by R.sup.1 and R.sup.2 include a methyl group, ethyl group, straight or branched propyl, butyl, pentyl, hexyl, heptyl and octyl groups. Examples of the substituted alkyl group represented by R.sup.1 and R.sup.2 include a lower alkoxyalkyl group such as a methoxyethyl group, ethoxyethyl group or butoxyethyl group; a lower alkoxyalkoxyalkyl group such as a methoxyethoxyethyl group or ethoxyethoxyethyl group; a phenoxyalkyl group such as a phenoxyethyl group; an aralkyloxy lower alkyl group which may be substituted such as benzyloxyethyl group or chlorobenzyloxyethyl group; a hydroxyalkyl group which may be substituted such as a hydroxyethyl group, hydroxypropyl group, hydroxybutyl group, hydroxyhexyl group, or 2-hydroxy-3-methoxypropyl group; a cyano lower alkyl group such as a cyanomethyl group or cyanoethyl group; an acyloxy lower alkyl group which may be substituted such as an acetyloxyethyl group, chloroacetyloxyethyl group, chloropropionyloxyethyl group or benzoyloxyethyl group; an alkoxycarbonyloxy lower alkyl group such as a methoxycarbonyloxyethyl group or methoxyethoxycarbonyloxyethyl group; a carbamoyl lower alkyl group such as a carbamoylmethyl group or carbamoylethyl group; an alkoxycarbonyl lower alkyl group which may be substituted such as a methoxycarbonylmethyl group, ethoxycarbonylmethyl group, methoxyethoxycarbonylmethyl group or benzyloxycarbonylmethyl group; an aralkyl group which may be substituted such as a benzyl group, phenethyl group or chlorobenzyl group; an allyloxycarbonyl lower alkyl group such as an allyloxycarbonylethyl group or allyoxycarbonylmethyl group; a tetrahydrofurfuryl group; a succinimide lower alkyl group such as a succinimide ethyl group; a phthalylimide lower alkyl group such as a phthalimide ethyl group; a cyanoalkoxy lower alkyl group such as a cyanoethoxyethyl group or cyanomethoxyethyl group; and a halogeno lower alkyl group such as a chloroethyl group. Examples of the aryl group represented by R.sup.1 and R.sup.2 include a phenyl group, chlorophenyl group and methylphenyl group.

The dis-azo dye of the formula (I) can be produced by diazotizing an amine of the formula (II):

D-NH.sub.2 (II) wherein D is the same as defined above, coupling the diazotized amine with a 2-amino-4-thienylthiazole of the formula (III): ##STR3## wherein X is the same as defined above, diazotizing the resulting mono-azo compound of the formula (IV): ##STR4## wherein D and X are each the same as defined above, and coupling the resulting diazo compound with an aniline of the formula (V): ##STR5## wherein Y, Z, R.sup.1 and R.sup.2 are each the same as defined above.

Examples of the amine represented by the formula (II) include the following: a benzene amine such as aniline, o-, m- or p-fluoroaniline, o-, m- or p-chloroaniline, o-, m- or p-bromoaniline, 2,4-dichloroaniline, 2,3-dichloroaniline, 2-chloro-4-bromoaniline, 2,4-difluoroaniline, 2,4,6-trichloroaniline, o-, m- or p-tuluidine, o-, m- or p-ethylaniline, o-, m- or p-anisidine, m-trifluoromethylaniline, 4-phenylazoaniline, o- or p-cyanoaniline, o-, m- or p-nitroaniline, 2-chloro-4-nitroaniline, 2-bromo-4-nitroaniline, 2-cyano-4-nitroaniliane, 2-chloro-4-methoxyaniline, o-, m- or p-methylsulfonylaniline, o-, m- or p-ethylsulfonylaniline, o-, m- or p-methoxycarbonylaniline, o-, m- or p-ethoxycarbonylaniline, p-butoxycarbonylaniline, p-allyloxycarbonylaniline, p-allyloxyethoxycarbonylaniline, o-, m-or p-methoxyethoxycarbonylaniline, p-N,N-dimethylaminocarbonylaniliane, p-N-ethylaminocarbonylaniline, p-N-allylaminocarbonylaniline, 2-chloro-4-methoxycarbonylaniline, p-N,N-dimethylaminosulfonylaniline, m-N,N-diethylaminosulfonylaniline, p-N-ethylaminosulfonylaniline and p-phenylaniline; a pyridine amine such as 3-aminopyridine, 3-amino-6-bromopyridine, 3-amino-5-bromopyridine, 3-amino-6-chloropyridine, 4,6-dichloro-3-aminopyridine, 3-amino-6-nitropyridine, 3-amino-4-cyanopyridine, 3-amino-5-methylpyridine, 3-amino-6-methylsulfonylpyridine, 3-amino-4-chloro-6-nitropyridine, and 3-amino-5-methyl-6-bromopyridine; a thiazole amine such as 2-aminothiazole, 2-amino-4-methylthiazole, 2-amino-4-methyl-5-ethoxycarbonylthiazole, 2-amino-5-nitrothiazole, 2-amino-5-bromothiazole, 2-amino-5-chlorothiazole, 2-amino-4-trifluoromethylthiazole, 2-amino-4-methyl-5-methoxyethoxycarbonylthiazole and 2-amino-4-methyl-5-bromothiazole.

Fibers which can be dyed with the dis-azo dye of the present invention include polyester fibers made of polyethylene terephthalate or polycondensate of terephthalic acid and 1,4-bis(hydroxymethyl)cyclohexane, or blended yarn or fabric of such polyester fibers and natural fibers such as cotton, silk and wool.

The dye of the formula (I) is a water-insoluble or sparingly soluble in water, so polyester fibers can be dyed by exhaustion dyeing or printing with a dye bath or printing paste having this dye dispersed in an aqueous medium in the presence of a dispersant such as a naphthalenesulfonic acid-formaldehyde condensate, sulfuric acid ester of higher alcohol or higher alkylbenzenesulfonate salt. For instance, conventional techniques of dip dyeing such as high-temperature dyeing, carrier dyeing and thermosol dyeing can be employed to dye polyester fibers or their blends with natural fibers, and the so dyed fibers have satisfactory fastness properties. Better results are obtained by incorporating in the dye bath an acidic substance such as formic acid, acetic acid, phosphoric acid or ammonium sulfate. The dyes of the formula (I) can be used in combination with the same or other lines of dye. The combination of the dyes of the formula (I) with themselves provides better results with respect to dyeing properties (substantivity).

The present invention is now described in greater detail by reference to the following non-limiting example.

EXAMPLE 1

A dye bath was prepared by dispersing 0.5 of a dye of the formula: ##STR6## in 3 l of water containing 1 g of napthalenesulfonic acid-formaldehyde condensate and 2 g of sulfuric acid ester of higher alcohol. 100 g of polyester fibers was immersed in the bath for 60 minutes at 130.degree. C., soaped, rinsed and dried. The dyed fibers was navy blue in color and had great fastness to light, sublimination and water. The dye had high stability to temperature and pH changes during the dyeing.

The dye used in this example was prepared as follows: 9.3 g of aniline was dissolved in 150 ml of 4% hydrochloric acid. The solution was cooled to 2.degree. C. and mixed with 50 ml of 2 N sodium nitrite, with care taken not to cause the temperature of the mixture to exceed 5.degree. C. The resulting solution of aniline in diazonium salt was added to a solution of 2-amino-4-thienylthiazole (18.2 g) in methanol (200 ml) to 2.degree. C., and the mixture was stirred at 2.degree. C. for 2 hours. The precipitating monoazo compound was filtered off, washed with water and dried. The mono-azo compound or 2-amino-4-thienyl-5-phenylazothiazole (14.3 g) was added to a mixture of acetic acid (143 ml) and phosphoric acid (143 ml). To the resulting mixture, nitrosylsulfuric acid (prepared by dissolving 3.5 g of sodium nitrite in 20 g of 97% sulfuric acid) was added gradually at 0.degree. to 5.degree. C., and the mixture was stirred at 0.degree. to 5.degree. C. for 30 minutes to prepare a diazo solution of the mono-azo compound. A solution of N-(ethyl)-N-(.beta.-acetoxyethyl)aniline (10.5 g) in 200 ml of methanol was added to a mixture of ice (200 g) and water (100 ml). To the resulting mixture, the previously prepared diazo solution was added, and the mixture was stirred at 0.degree. to 5.degree. C. for 2 hours. The precipitating dis-azo dye was filtered off, washed with water and dried. The dried dis-azo dye had a .lambda.max (in acetone) at 609 nm.

EXAMPLE 2

As in Example 1, polyester fabrics were dyed with the compounds indicated in Table 1, and the respective fabrics were given the colors also indicated in Table 1.

TABLE 1 ##STR7## Dyeing Shade .lambda. max (on polyester (acetone) No. D X Y Z R.sup.1 R.sup.2 fibers) nm 1 ##STR8## H H H C.sub.2 H.sub.5 C.sub.2 H.sub.4 CN Navy blue 600 2 " " " " " C.sub.2 H.sub.4 COOCH.sub.3 " 610 3 " " " " " C.sub.2 H.sub.4 OCOOCH.sub.3 " 608 4 " " " " " C.sub.2 H.sub.4 COOCH.sub.2 CHCH.sub.2 " 610 5 " " " " " C.sub.2 H.sub.4 OCH.sub.3 " 617 6 " " " " " C.sub.2 H.sub.5 " 621 7 " " " " " C.sub.4 H.sub.9 (n) " 623 8 " " " " " ##STR9## " 614 9 " " " " " H " 591 10 " " " " " CH.sub.2 COOCH.sub.3 " 592 11 ##STR10## H H H C.sub.2 H.sub.5 ##STR11## Navy blue 615 12 " " " " " C.sub.2 H.sub.4 OCOCH.sub.2 Cl " 607 13 " " " " " C.sub.2 H.sub.4 COOC.sub.4 H.sub.9 (i) " 610 14 " " " " " ##STR12## " 618 15 " " " " C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 OCOCH.sub.3 " 602 16 " " " " C.sub.2 H.sub.4 OCOOCH.sub.3 C.sub.2 H.sub.4 OCOOCH.sub.3 " 598 17 " " " " C.sub.2 H.sub.4 OCH.sub.3 C.sub.2 H.sub.4 OCH.sub.3 " 615 18 " " " " C.sub.2 H.sub.4 OCH.sub.2CHCH.sub.2 C.sub.2 H.sub.4 OCH.sub.2CHCH.sub.2 " 613 19 " " " " C.sub.2 H.sub.4 COOCH.sub.3 C.sub.2 H.sub.4 COOCH.sub.3 " 603 20 " " " " C.sub.2 H.sub.4 COOCH.sub.3 H " 586 21 " " " " CH.sub.2 COOCH.sub.3 CH.sub.2 COOCH.sub.3 " 582 22 " " " " CH.sub.3 CH.sub.3 " 614 23 ##STR13## H H H CH.sub.3 C.sub.2 H.sub.4 COOCH.sub.3 Navy blue 607 24 " " " " CH.sub.2CHCH.sub.2 CH.sub.2CHCH.sub.2 " 616 25 " " " " " C.sub.2 H.sub.4 CN " 597 26 " " " " " C.sub.2 H.sub.4 COOCH.sub.3 " 608 27 " " " " " C.sub.2 H.sub.4 OCOCH.sub.3 " 606 28 " " " " " CH.sub.2 COOCH.sub.3 " 596 29 " " " " C.sub.3 H.sub.7 (n) C.sub.2 H.sub.4 CN " 602 30 " " " " " C.sub.3 H.sub.7 (n) " 624 31 " " " " " C.sub.2 H.sub.4 OH " 622 32 " " " " ##STR14## ##STR15## " 620 33 " " " " C.sub.2 H.sub.4 OCOC.sub.2 H.sub.4 Cl C.sub.2 H.sub.4 OCOC.sub.2 H.sub.4 Cl " 600 34 " " CH.sub.3 " C.sub.2 H.sub.5 C.sub.2 H.sub.4 CN " 613 35 ##STR16## H CH.sub.3 H C.sub.2 H.sub.5 C.sub.2 H.sub.4 OCOCH.sub.3 Navy blue 622 36 " " " " C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 OCOCH.sub.3 " 614 37 " " " " C.sub.2 H.sub.4 COOCH.sub.3 C.sub.2 H.sub.4 COOCH.sub.3 " 615 38 " " " " H ##STR17## " 603 39 " " " " C.sub.2 H.sub.5 C.sub.2 H.sub.4 OH Green 634 40 " " NHCOCH.sub.3 " " C.sub.2 H.sub.5 " 630 41 " " " " C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 OCOCH.sub.3 Navy blue 615 42 " " " " C.sub.2 H.sub.4 CN C.sub.2 H.sub.5 " 613 43 " " " " C.sub.2 H.sub.4 OCH.sub.3 C.sub.2 H.sub.4 OCH.sub.3 " 623 44 " " " " C.sub.2 H.sub.4 COOC.sub.2 H.sub.5 C.sub.2 H.sub.4 COOC.sub.2 H.sub.5 " 617 45 " " " CH.sub.3 C.sub.2 H.sub.5 H " 615 46 " " " OCH.sub.3 C.sub.2 H.sub.4 COOCH.sub.3 " " 609 47 ##STR18## H NHCOCH.sub.3 OCH.sub.3 C.sub.2 H.sub.5 C.sub.2 H.sub.5 Green 638 48 " " Cl H C.sub.2 H.sub.4 CN " Navy blue 588 49 " " " " C.sub.2 H.sub.5 ##STR19## " 586 50 " " " " CH.sub.2CHCH.sub.2 CH.sub.2 COOCH.sub.3 " 583 51 " " " " C.sub.2 H.sub.5 CH.sub.2 COOCH.sub.2CHCH.sub.2 " 586 52 " " " " C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 OCOCH.sub.3 " 589 53 " " " " C .sub.2 H.sub.4 OCOOC.sub.2 H.sub.5 C.sub.2 H.sub.4 OCOOC.sub.2 H.sub.5 " 587 54 " Cl H CH.sub.3 C.sub.2 H.sub.5 C.sub.2 H.sub.4 COOCH.sub.3 " 615 55 " " " Cl " C.sub.2 H.sub.4 CN " 593 56 ##STR20## Br " H " C.sub.2 H.sub.4 OCOCH.sub.3 " 606 57 " " CH.sub.3 " " C.sub.2 H.sub.4 COOC.sub.2 H.sub.5 " 618 58 ##STR21## Br CH.sub.3 H C.sub.2 H.sub.4 COOCH.sub.3 C.sub.2 H.sub.4 COOCH.sub.3 Navy blue 611 59 " " " " C.sub.2 H.sub.5 CH.sub.2 COOCH.sub.3 " 615 60 " COCH.sub.3 H " " C.sub.2 H.sub.4 CN " 592 61 " " NHCOCH.sub.3 " C.sub.2 H.sub.4 OCH.sub.3 C.sub.2 H.sub.4 OCH.sub.3 " 621 62 ##STR22## H H " C.sub.2 H.sub.4 CN C.sub.2 H.sub.5 " 608 63 " " " " C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 OCOCH.sub.3 " 610 64 " " " " C.sub.2 H.sub.5 H " 602 65 " Cl Cl " C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 OCOCH.sub.3 " 602 66 " H NHCOCH.sub.3 " C.sub.2 H.sub.5 C.sub.2 H.sub.5 " 637 67 " COCH.sub.3 H " C.sub.2 H.sub.4 COOCH.sub.3 H " 589 68 ##STR23## H CH.sub.3 " C.sub.2 H.sub.5 C.sub.2 H.sub.4 CN " 622 69 ##STR24## H H H C.sub.2 H.sub.4 OC.sub.4 H.sub.9 (n) C.sub.2 H.sub.4 OC.sub.4 H.sub.9 (n) Navy blue 620 70 " " CH.sub.3 " C.sub.2 H.sub.4 OCOCH.sub.3 C .sub.2 H.sub.4 CN " 610 71 ##STR25## " Cl CH.sub.3 C.sub.2 H.sub.5 C.sub.2 H.sub.4 OCOCH.sub.3 " 613 72 " " H H H ##STR26## " 601 73 " " CH.sub.3 " C.sub.2 H.sub.5 ##STR27## " 624 74 " " " " H H " 601 75 ##STR28## " H " C.sub. 2 H.sub.5 C.sub.2 H.sub.4 CN Green 628 76 " " " " " C.sub.2 H.sub.4 OCOCH.sub.3 " 639 77 " " CH.sub.3 " " C.sub.2 H.sub.4 CN " 641 78 " " NHCOCH.sub.3 " " C.sub.2 H.sub.5 " 655 79 ##STR29## H H H C.sub.2 H.sub.5 C.sub.2 H.sub.4 CN Navy blue 619 80 ##STR30## " Cl " C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 OCOCH.sub.3 " 612 81 ##STR31## " CH.sub.3 " " C.sub.2 H.sub.4 CN " 603 82 ##STR32## " H CH.sub.3 C.sub.2 H.sub.5 C.sub.2 H.sub.5 Green 645 83 " " " Cl " H Navy blue 615 84 " " " H C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 CN " 623 85 " " CH.sub.3 " C.sub.2 H.sub.5 " Green 635 86 ##STR33## " H " " " " 625 87 ##STR34## H NHCOCH.sub.3 H C.sub.2 H.sub.5 C.sub.2 H.sub.5 Green 645 88 ##STR35## " H " C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 COOCH.sub.3 Navy blue 615 89 " " " " CH.sub.2CHCH.sub.2 C.sub.2 H.sub.4 OCOCH.sub.3 " 622 90 ##STR36## " " " C.sub.2 H.sub.5 C.sub.2 H.sub.4 CN " 625 91 ##STR37## " " " C.sub.2 H.sub.4 OCOC.sub.2 H.sub.5 C.sub.2 H.sub.4 OCOC.sub.2 H.sub.5 " 621 92 ##STR38## " " " C.sub.2 H.sub.5 C.sub.2 H.sub.4 CN " 612 93 " " " " C.sub.2 H.sub.4 OC.sub.2 H.sub.5 C.sub.2 H.sub.4 OC.sub.2 H.sub.5 " 625 94 ##STR39## " " " C.sub.2 H.sub.5 C.sub.2 H.sub.4 OCOC.sub.2 H.sub.4 Cl Green 642 95 ##STR40## H H H C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 OCOCH.sub.3 Green 631 96 ##STR41## " " " C.sub.2 H.sub.4 CN C.sub.2 H.sub.4 COOCH.sub.3 Navy blue 623 97 ##STR42## " " " CH.sub.2CHCH.sub.2 C.sub.2 H.sub.4 CN " 617 98 ##STR43## " CH.sub.3 " C.sub.2 H.sub.5 C.sub.2 H.sub.4 OCH.sub.3 " 627 99 ##STR44## " H " " C.sub.2 H.sub.4 CN " 624 100 ##STR45## " " " C.sub.2 H.sub.4 OCOOCH.sub.3 C.sub.2 H.sub.4 OCOOCH.sub.3 " 597 101 ##STR46## Cl NHCOCH.sub.3 " C.sub.2 H.sub.5 C.sub.2 H.sub.5 " 629 102 ##STR47## H H H C.sub.2 H.sub.5 C.sub.2 H.sub.4 COOCH.sub.3 Navy blue 617 103 ##STR48## " " " " C.sub.2 H.sub.4 OCOOCH.sub.3 " 621 104 ##STR49## " " " C.sub.2 H.sub.4 OCH.sub.3 C.sub.2 H.sub.4 OCH.sub.3 Green 638 105 ##STR50## " " " C.sub.2 H.sub.5 C.sub.2 H.sub.4 OH " 645 106 ##STR51## " " " C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 OCOCH.sub.3 Navy blue 613 107 ##STR52## " CH.sub.3 " C.sub.2 H.sub.5 C.sub.2 H.sub.4 CN Green 640 108 ##STR53## " H " " C.sub.2 H.sub.4 OCOCH.sub.3 " 637 109 ##STR54## H CH.sub.3 H C.sub.2 H.sub.5 C.sub.2 H.sub.4 OCOCH.sub.3 Green 654 110 ##STR55## " Cl " C.sub.2 H.sub.4 OCOCH.sub.3 " Navy blue 605 111 ##STR56## " CH.sub.3 " C.sub.2 H.sub.5 C.sub.2 H.sub.4 CN " 623

EXAMPLE 3

A dye bath was prepared by dispersing 4.0 g of a dye of the formula: ##STR57## in 3 l of water containing 1 g of naphthalenesulfonic acid-formaldehyde condensate and 2 g of sulfuric acid ester of higher alcohol. 100 g of polyester fabric was immersed in the bath for 60 minutes at 130.degree. C., soaped, rinsed and dried. The dyed fabric was black in color and had great color fastness to light, sublimination and water. The dye had high stability to temperature and pH changes during the dyeing. The dye used in this example was prepared as in Example 1, and had a .lambda.max (in acetone) at 600 nm.

EXAMPLE 4

As in Example 3, polyester fabrics were dyed with the compounds indicated in Table 2, and all fabrics were dyed black.

TABLE 2__________________________________________________________________________ ##STR58## .lambda. max Dyeing Shade (acetone)No. D X Y Z R.sup.1 R.sup.2 (on polyester nmbers)__________________________________________________________________________ ##STR59## H H H C.sub.4 H.sub.9 (n) C.sub.2 H.sub.4 CN Black 6052 " " " " C.sub.3 H.sub.6 COOCH.sub.3 C.sub.2 H.sub.5 " 6223 " " " " C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 CN " 5924 " " CH.sub.3 " C.sub.2 H.sub.5 " " 6125 ##STR60## " H " " " " 6276 " " " " " C.sub.2 H.sub.4 OCOCH.sub.3 " 6357 " " " " C.sub.2 H.sub.4 OCH.sub.3 " 6378 " " NHCOCH.sub.3 " C.sub.2 H.sub.5 C.sub.2 H.sub.5 " 6589 ##STR61## " H " C.sub.2 H.sub.4 OCOCH.sub.3 C.sub.2 H.sub.4 OCOCH.sub.3 " 62810 ##STR62## H H H C.sub.2 H.sub.5 C.sub.2 H.sub.4 CN Black 64811 " " " " " C.sub.2 H.sub.4 OCH.sub.3 " 65912 ##STR63## " " " " C.sub.2 H.sub.4 COOCH.sub.3 " 61313 ##STR64## " " " C.sub.2 H.sub.4 COOCH.sub.3 " " 61514 ##STR65## " " " C.sub.2 H.sub.5 " " 63815 " " " " C.sub.2 H.sub.4 OCH.sub.3 C.sub.2 H.sub.4 OCH.sub.3 " 640__________________________________________________________________________

While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.

Claims

1. A dis-azo dye for polyester fibers represented by the formula ##STR66## wherein Y is hydrogen or acetylamino, and R.sup.1 and R.sup.2 are each C.sub.1 -C.sub.4 alkyl, cyanoethyl, acetoxyethyl or C.sub.1 -C.sub.4 alkoxyethyl.