Monoazo dyes having a substituted 1,4-phenylene coupling component radical having one C.sub.8-14 alkyl group or moiety

Abstract

A Monoazo compounds of the formula ##STR1## wherein D is a diazo component radical of the 4-nitrophenyl series, thienyl-2 series, thiazolyl-2 series or 5-nitrobenzoisothiazolyl-3 series,R.sub.1 is hydrogen; C.sub.1-2 alkyl; C.sub.1-2 alkoxy; formylamino; (C.sub.1-4 alkyl)carbonylamino; (C.sub.1-4 alkyl)carbonylamino the alkyl group of which is substituted by 1 to 3 substituents independently selected from halo, C.sub.1-3 alkoxy, cyano, phenyl, phenoxy and benzyloxy; (C.sub.2-4 alkenyl)carbonylamino; halo(C.sub.2-4 alkenyl)carbonylamino; benzoylamino; benzoylamino the phenyl group of which is substituted by 1 to 3 substituents independently selected from halo, C.sub.1-4 alkyl and C.sub.1-4 alkoxy; (C.sub.1-4 alkoxy)carbonylamino; (C.sub.1-4 alkoxy)carbonylamino the alkyl moiety of which is substituted by 1 to 3 substituents independently selected from halo, C.sub.1-3 alkoxy, cyano, phenyl, phenoxy and benzyloxy; (C.sub.8-14 alkyl)carbonylamino or (C.sub.8-14 alkoxy)carbonylamino,R.sub.2 is C.sub.1-4 alkoxy or 2-(C.sub.1-4 alkoxy)ethoxy,R.sub.3 is hydrogen, C.sub.1-4 alkyl, C.sub.8-14 alkyl, 2-(C.sub.8-14 alkoxy)carbonylethyl, 2-(C.sub.8-14 alkyl)carbonyloxyethyl or 2-(C.sub.8-14 alkoxy)carbonyloxyethyl, andR.sub.4 is hydrogen, C.sub.1-4 alkyl, 2-cyanoethyl, 2-(C.sub.1-3 alkoxy)ethyl, 2-(C.sub.1-4 alkyl)carbonyloxyethyl, 2-(C.sub.1-4 alkoxy)carbonylethyl, 2-(C.sub.1-4 alkoxy)carbonyloxyethyl, C.sub.3-4 alkenyl, ##STR2## C.sub.8-14 alkyl, 2-(C.sub.8-14 alkyl)-carbonyloxyethyl, 2-(C.sub.8-14 alkoxy)carbonylethyl or 2-(C.sub.8-14 alkoxy)carbonyloxyethyl, whereinR.sub.5 is C.sub.1-4 alkyl, allyl, (C.sub.1-3 alkyl)-carbonyl, phenyl or phenyl substituted by 1 to 3 substituents independently selected from halo, C.sub.1-2 alkyl and C.sub.1-2 -alkoxy, andR.sub.6 is hydrogen, C.sub.1-4 alkyl and (C.sub.1-3 alkyl)-carbonyl,with the proviso that one and only one of R.sub.1, R.sub.3 and R.sub.4 is or contains a C.sub.8-14 alkyl group or moiety,which are useful for dyeing textile materials, for example polyester.

Description

The invention relates to monoazo dyes suitable for dyeing textile substrates, for example polyester.

According to the invention, there is provided a method for dyeing a textile substrate comprising applying to the substrate a compound of formula I ##STR3##

in which D is a diazo component radical of the 4-nitrophenyl series, thienyl-2series, thiazolyl-2 series or 5-nitrobenzisothiazolyl-3 series;

R.sub.1 is hydrogen; C.sub.1-2 alkyl; C.sub.1-2 alkoxy; formylamino; C.sub.1-4 alkylcarbonylamino in which the alkyl group can bear 1 to 3 groups independently selected from halogen, C.sub.1-3 alkoxy, phenoxy, phenyl, benzyloxy and cyano; C.sub.1-4 alkoxycarbonylamino in which the alkyl group can bear 1 to 3 groups independently selected from halogen, C.sub.1-3 alkoxy, phenoxy, phenyl, cyano and benzyloxy; benzoylamino in which the phenyl group can bear 1 to 3 groups independently selected from halogen, C.sub.1-4 alkyl and C.sub.1-4 alkoxy; C.sub.2-4 alkenylcarbonylamino; halo-C.sub.2-4 alkenylcarbonylamino; C.sub.8-14 alkylcarbonylamino or C.sub.8-14 alkoxycarbonylamino;

R.sub.2 is C.sub.1-4 alkoxy (preferably C.sub.1-2 alkoxy) or 2-(C.sub.1-4 alkoxy)ethoxy (preferably 2-(C.sub.1-2 alkoxy)ethoxy);

R.sub.3 is C.sub.8-14 alkyl, hydrogen, 2-C.sub.8-14 alkoxycarbonylethyl, 2-C.sub.8-14 alkylcarbonyloxyethyl, 2-C.sub.8-14 alkoxycarbonyloxyethyl or C.sub.1-4 alkyl; and

R.sub.4 is hydrogen, C.sub.1-4 alkyl, 2-cyanoethyl, C.sub.3-4 alkenyl, 2-C.sub.1-3 alkoxyethyl, 2-C.sub.1-4 alkylcarbonyloxyethyl, 2-C.sub.1-4 alkoxycarbonylethyl, C.sub.8-14 alkyl, 2-C.sub.1-4 alkoxycarbonyloxyethyl, 2-C.sub.8-14 alkylcarbonyloxyethyl, 2-C.sub.8-14 alkoxycarbonylethyl, 2-C.sub.8-14 alkoxycarbonyloxyethyl or ##STR4##

wherein R.sup.5 is C.sub.1-4 alkyl, allyl, C.sub.1-3 alkylcarbonyl or phenyl, unsubstituted or substituted by 1 to 3 groups, independently selected from halogen C.sub.1-2 alkyl and C.sub.1-2 alkoxy, and

R.sub.6 is hydrogen, C.sub.1-4 alkyl or --COC.sub.1-3 alkyl,

with the proviso that one and only one of R.sub.1, R.sub.3 and R.sub.4 is or contains a C.sub.8-14 alkyl group or moiety.

Unless otherwise indicated, each C.sub.1-4 alkyl or C.sub.8-14 alkyl group or moiety may be linear and branched and is preferably the former.

Any alkyl group and moiety in R.sub.1 that may bear 1 to 3 substituents is preferably unsubstituted or monosubstituted, more preferably the former.

In this Specification any phenyl group is preferably unsubstituted or monosubstituted.

Any C.sub.1-3 alkyl or C.sub.1-4 alkyl group or moiety is preferably methyl or ethyl when unsubstituted. Any substituted C.sub.1-4 alkyl group or moiety is preferably substituted C.sub.1-3 alkyl when monosubstituted, substituted C.sub.2-4 alkyl when disubstituted and substituted C.sub.3-4 alkyl when trisubstituted. Any C.sub.1-3 alkoxy or C.sub.1-4 alkoxy group or moiety is preferably methoxy or ethoxy.

In this Specification, halogen is preferably fluoro, chloro or bromo, more preferably chloro or bromo.

Preferably D is D' where D' is a group of formula a, b, c, or d ##STR5##

in which R.sub.7 is hydrogen, cyano or halogen;

one of R.sub.8 and R.sub.9 is hydrogen and the other is hydrogen or chloro (more preferably both R.sub.8 and R.sub.9 are hydrogen);

R.sub.10 is cyano or nitro;

R.sub.11 is hydrogen, halogen, C.sub.1-4 alkyl or phenyl;

R.sub.12 is formyl, cyano, nitro, C.sub.1-4 alkoxycarbonyl or C.sub.1-4 alkylcarbonyl;

R.sub.13 is hydrogen, chloro, C.sub.1-3 alkyl or phenyl; and

R.sub.14 is cyano, nitro or C.sub.1-4 alkoxycarbonyl.

More preferably D is D" where D" is a group of formula a' ##STR6##

in which R.sub.7 ' is chloro or bromo.

Preferably R.sub.1 is R.sub.1 ' where R.sub.1 ' is C.sub.1-2 alkylcarbonylamino.

Preferably R.sub.2 is R.sub.2 ' where R.sub.2 ' is C.sub.1-2 alkoxy or 2-(C.sub.1-2 alkoxy)ethoxy. More preferably R.sub.2 is R.sub.2 " where R.sub.2 " is C.sub.1-2 alkoxy.

Preferably when R.sub.3 is hydrogen or C.sub.1-4 alkyl, then R.sub.4 is 2-C.sub.8-14 alkoxycarbonylethyl.

More preferably R.sub.3 is R.sub.3 ' and R.sub.4 is R.sub.4 ' where R.sub.3 ' is hydrogen or C.sub.1-4 alkyl and R.sub.4 ' is 2-C.sub.10-12 alkoxycarbonylethyl or R.sub.3 ' is C.sub.10-12 alkyl and R.sub.4 ' is hydrogen or allyl.

Compounds of formula I can be prepared by coupling a diazotised amine of formula II

D--NH.sub.2 (II) with a compound of formula III ##STR7##

Compounds of formulae II and III are known or may be prepared by known methods from known compounds. Diazotisation and coupling can be carried out by known methods.

Compounds of formula I are new.

Compounds of formula I can be worked up into dyeing preparations in known ways, for example by milling (e.g. sand milling) in the presence of a dispersing agent or filling material. The preparation so produced, which may be dried in vacuum or by atomisation, can be used in a long or a short dyebath for dyeing, padding or printing material.

The dyes of the invention exhaust very well (preferably at temperatures over 120.degree. C., more preferably over 130.degree. C.) to give deep shades on synthetic or semi-synthetic hydrophobic high molecular weight textile material from an aqueous suspension. The dyestuffs of the invention are particularly useful for dyeing, padding or printing textile material made from linear aromatic polyester, cellulose 21/2 acetate, cellulose triacetate or synthetic polyamide.

Dyeing, printing or padding may be carried out by known methods, in particular according to the methods described in UK Pat. No. 1,114,433 (=FP 1,445,371).

Compounds of formula I produce dyeings having excellent wet and contact fastness after thermal treatment (for example drying, after-fixing and finishing optionally in the presence of a finishing agent).

Besides having excellent wet and contact fastnesses, dyeings with compounds of formula I have generally good fastness properties.

The invention will now be illustrated by the following Examples in which all parts and percentages are by weight and all temperatures are in .degree.C.

EXAMPLE 1

26.3 Parts of 2,4-dinitro-6-bromoaniline (99.6%) are dissolved in 130 parts of 94% sulphuric acid and are then diazotised at 15.degree. to 20.degree. C. with 36.5 parts of 40% nitrosylsulphuric acid.

42.9 Parts of 1-acetylamino-3-(2-n-dodecyloxycarbonylethyl) amino-4-methoxybenzene are dissolved in a mixture of 500 parts of glacial acetic acid and 70 parts of water. 2.5 Parts of aminosulphonic acid are added, the mixture is cooled to 0.degree.-5.degree. C. and the diazonium solution which has been cooled to 0.degree.-5.degree. C. is slowly added to the coupling component together with an even slower addition of 500 parts of water (at 0.degree.-5.degree. C.) whilst stirring well. The resulting dyestuff suspension is filtered, washed neutral with warm water and dried at about 50.degree. C. under vacuum. The resultant dyestuff is of formula 1a ##STR8## (.lambda.max in DMF=598 nm)

and dyes polyester a navy-blue shade with good fastness properties, in particular excellent wet and contact fastness properties after thermal aftertreatment.

The C.sub.10-14 alkyl group or moiety of each compound of Examples 2-29 and 31-53 is linear, and the R.sub.3 group of Example 30 is 1-methyl-n-undecyl. Each --C.sub.2 H.sub.4 -- radical in the examples is --(CH.sub.2).sub.2 --.

EXAMPLES 2 TO 30

Compounds of the formula ##STR9##

in which R.sub.1a to R.sub.7 are as defined in Table 1 below, can be prepared by a method analogous to that of Example 1 from appropriate reactants.

TABLE 1__________________________________________________________________________ Shades ofEx. .lambda.max. dyeing onNo. R.sub.7 R.sub.1a R.sub.2a R.sub.3 R.sub.4 in nm polyester__________________________________________________________________________2 Br CH.sub.3 CH.sub.3 C.sub.2 H.sub.4 COOC.sub.10 H.sub.21 H 598 navy blue3 " " " C.sub.2 H.sub.4 COOC.sub.14 H.sub.29 H 598 "4 " " " C.sub.2 H.sub.4 COOC.sub.10 H.sub.21 C.sub.2 H.sub.5 607 greenish-blue5 " " " C.sub.2 H.sub.4 COOC.sub.12 H.sub.25 " 607 "6 Cl " " " " 608 "7 " " " " H 599 navy blue8 I " " " H 597 "9 " " " " C.sub.2 H.sub.5 606 greenish-blue10 Br " C.sub.2 H.sub.5 ##STR10## " 599 navy blue11 " " " " H 599 "12 " " C.sub.2 H.sub.4 OCH.sub.3 C.sub.2 H.sub.4 COOC.sub.12 H.sub.25 H 600 "13 " " " " C.sub.2 H.sub.5 609 greenish-blue14 " C.sub.2 H.sub.5 CH.sub.3 " H 599 navy blue15 " CH.sub.2Cl " " H 596 "16 " CH.sub.2OCH.sub.3 " " H 595 "17 " CHCH.sub.2 " " H 601 "18 " CH.sub.3 " C.sub.10 H.sub.21 H 605 "19 " " " C.sub.12 H.sub.25 CH.sub.2 CHCH.sub.2 612 greenish blue20 " " " C.sub.10 H.sub.21 C.sub.2 H.sub.4 CN 590 reddish-blue21 " " " " CH.sub.2 CHCH.sub.2 612 blue22 " C.sub.11 H.sub.23 " CH.sub.2 CH.sub.3 C.sub.2 H.sub.4 OCOC.sub.2 H.sub.5 609 "23 " CH.sub.3 " C.sub.10 H.sub.21 C.sub.2 H.sub.4 COOC.sub.2 H.sub.5 608 "24 " " " " C.sub.2 H.sub.4 OCOCH.sub.3 608 "25 " " " " ##STR11## 607 "26 Br CH.sub.3 CH.sub.3 C.sub.10 H.sub.21 ##STR12## 608 greenish-blue27 " " " " C.sub.2 H.sub.4OCH.sub.3 614 "28 CN " " C.sub.12 H.sub.25 H 624 blue-green29 " " " C.sub.10 H.sub.21 H 624 "30 " " " CH(CH.sub.3)C.sub.10 H.sub.21 H 625 "__________________________________________________________________________

EXAMPLES 31-35

The following compounds can be prepared by a method analogous to that of Example 1 from appropriate reactants

TABLE 2__________________________________________________________________________ Shades ofEx. .lambda.max. dyeing onNo. in nm polyester__________________________________________________________________________31 ##STR13## 600 navy blue32 ##STR14## 590 "33 ##STR15## 590 "34 ##STR16## blue35 ##STR17## navy blue__________________________________________________________________________

EXAMPLES 36-41

Compounds of the formula ##STR18##

in which R.sub.1a to R.sub.4 are defined in Table 3 below, can be prepared by a method analogous to that of Example 1 from appropriate reactants.

TABLE 3__________________________________________________________________________ Shade ofEx. .dbd.max. dyeings onNo. R.sub.1a R.sub.2a R.sub.3 R.sub.4 in nm polyester__________________________________________________________________________36 --CH.sub.3 --CH.sub.3 H --C.sub.2 H.sub.4 COOC.sub.12 H.sub.25 608 navy blue37 " " --C.sub.2 H.sub.5 " 628 greenish- blue38 " --C.sub.2 H.sub.5 " " 629 "39 " " H " 610 navy blue40 " --CH.sub.3 --C.sub.10 H.sub.21 --CH.sub.2 --CH.dbd.CH.sub.2 631 greenish- blue41 " --C.sub.2 H.sub.5 " " 632 "__________________________________________________________________________

EXAMPLES 42 to 53

Compounds of the formula ##STR19##

in which R.sub.2a, R.sub.3, R.sub.4, R.sub.11 and R.sub.14 are as defined in Table 4 below, can be prepared from appropriate reactants by a method analogous to that of Example 1. R.sub.12 is --CN in Examples 42 to 51 and --CHO in Examples 52 and 53.

TABLE 4__________________________________________________________________________ Shade ofEx. dyeing onNo. R.sub.13 R.sub.14 R.sub.2a R.sub.3 R.sub.4 polyester__________________________________________________________________________42 --CH.sub.3 --CN --CH.sub.3 H --C.sub.2 H.sub.4 COOC.sub.12 H.sub.25 navy blue43 " " " --C.sub.2 H.sub.5 " greenish- blue44 " " --C.sub.2 H.sub.5 " " "45 " " " H " navy blue46 --C.sub.6 H.sub.5 " --CH.sub.3 H " "47 " " --C.sub.2 H.sub.5 H " "48 --CH.sub.3 --COOC.sub.2 H.sub.5 --CH.sub.3 H " "49 " " " --C.sub.2 H.sub.5 " "50 " " --C.sub.2 H.sub.5 " " "51 " " " H " "52 C1 --CN --CH.sub.3 --C.sub.10 H.sub.21 --CH.sub.2 --CH.dbd.CH.sub.2 greenish- blue53 " " --C.sub.2 H.sub.5 " " "__________________________________________________________________________

APPLICATION EXAMPLE

The dyestuff of formula 1a (prepared according to Example 1) is sandmilled in the presence of a commercially available ligninsulphonate (dispersing agent) followed by atomisation to form an ultradisperse dyeing preparation having an average particle size of 1.mu. and a coupage ratio of 3.5:10.

24 Parts of the above produced preparation are dispersed in 1000 parts of water and this is then added to 13,000 parts of a mother liquor containing 30 part of ammonium sulphate and 0.3 parts of formic acid as buffer (optionally with a carrier or levelling medium) at 60.degree. C. in a dyeing autoclave. A pre-washed cross-bobbin (1000 parts of polyester yarn on a plastic frame) is added to the dyeing autoclave, which is then closed and heated over 35 minutes to 130.degree. C. After 90 minutes, the autoclave is cooled to 80.degree. C., the spent liquor is removed and the dyed substrate is washed thoroughly with cold water and then is reductively cleared.

After elimination of water, the substrate is dried. The resulting dyeing is of a navy blue nuance and is free of filtrations (i.e., impurities).

Instead of the compound of formula 1a an appropriate amount of any one of Examples 2 to 53 may be used in the method of the Application Example.

Claims

1. A process of dyeing a textile substrate comprising applying a compound of the formula ##STR20## to a textile substrate from an aqueous medium, wherein

D is ##STR21## wherein R.sub.7 is hydrogen, cyano or halo,

R.sub.8 is hydrogen or chloro,

R.sub.9 is hydrogen or chloro, with the proviso that at least one of R.sub.8 and R.sub.9 is hydrogen,

R.sub.10 is cyano or nitro,

R.sub.12 is formyl, cyano, nitro, (C.sub.1-4 alkoxy)carbonyl or (C.sub.1-4 alkyl)carbonyl,

R.sub.13 is hydrogen, chloro, C.sub.1-3 alkyl or phenyl, and

R.sub.14 is cyano, nitro or (C.sub.1-4 alkoxy)carbonyl,

R.sub.1 is hydrogen; C.sub.1-2 alkyl; C.sub.1-2 alkoxy; formylamino; (C.sub.1-4 alkyl)carbonylamino; (C.sub.1-4 alkyl)carbonylamino the alkyl group of which is substituted by 1 to 3 substituents independently selected from halo, C.sub.1-3 alkoxy, cyano, phenyl, phenoxy and benzyloxy; (C.sub.2-4 alkenyl)carbonylamino; halo(C.sub.2-4 alkenyl)carbonylamino; benzoylamino; benzoylamino the phenyl group of which is substituted by 1 to 3 substituents independently selected from halo, C.sub.1-4 alkyl and C.sub.1-4 alkoxy; (C.sub.1-4 alkoxy)carbonylamino; (C.sub.1-4 alkoxy)carbonylamino the alkyl moiety of which is substituted by 1 to 3 substituents independently selected from halo, C.sub.1-3 alkoxy, cyano, phenyl, phenoxy and benzyloxy; (C.sub.8-14 alkyl)carbonylamino or (C.sub.8-14 alkoxy)carbonylamino,

R.sub.2 is C.sub.1-4 alkoxy or 2-(C.sub.1-4 alkoxy)ethoxy,

R.sub.3 is hydrogen, C.sub.1-4 alkyl, C.sub.8-14 alkyl, 2-(C.sub.8-14 alkoxy)carbonylethyl, 2-(C.sub.8-14 alkyl)carbonyloxyethyl or 2-(C.sub.8-14 alkoxy)carbonyloxyethyl, and

R.sub.4 is hydrogen, C.sub.1-4 alkyl, 2-cyanoethyl, 2-(C.sub.1-3 alkoxy)ethyl, 2-(C.sub.1-4 alkyl)carbonyloxyethyl, 2-(C.sub.1-4 alkoxy)carbonylethyl, 2-(C.sub.1-4 alkoxy)carbonyloxyethyl, C.sub.3-4 alkenyl, ##STR22## C.sub.8-14 alkyl, 2-(C.sub.8-14 alkyl)carbonyloxyethyl, 2-(C.sub.8-14 alkoxy)carbonylethyl or 2-(C.sub.8-14 alkoxy)carbonyloxyethyl,

wherein

R.sub.5 is C.sub.1-4 alkyl, allyl, (C.sub.1-3 alkyl)carbonyl, phenyl or phenyl substituted by 1 to 3 substituents independently selected from halo, C.sub.1-2 alkyl and C.sub.1-2 alkoxy, and

R.sub.6 is hydrogen, C.sub.1-4 alkyl or (C.sub.1-3 alkyl)carbonyl, with the proviso that one and only one of R.sub.1, R.sub.3 and R.sub.4 is or contains a C.sub.8-14 alkyl group or moiety.

2. A process according to claim 1 wherein D is ##STR23##

3. A process according to claim 2 wherein

D is ##STR24## wherein R.sub.7 ' is chloro or bromo.

4. A process according to claim 3 wherein the compound is applied to the textile substrate at a temperature above 120.degree. C.

5. A process according to claim 3 wherein

R.sub.1 is hydrogen; C.sub.1-2 alkyl; C.sub.1-2 alkoxy; formylamino; (C.sub.1-4 alkyl)carbonylamino; (C.sub.1-4 alkyl)carbonylamino the alkyl group of which is monosubstituted by halo, C.sub.1-3 alkoxy, cyano, phenyl, phenoxy or benzyloxy; (C.sub.2-4 alkenyl)carbonylamino; halo(C.sub.2-4 alkenyl)carbonylamino; benzoylamino; benzoylamino the phenyl group of which is monosubstituted by halo, C.sub.1-4 alkyl or C.sub.1-4 alkoxy; (C.sub.1-4 alkoxy)carbonylamino; (C.sub.1-4 alkoxy)carbonylamino the alkyl moiety of which is monosubstituted by halo, C.sub.1-3 alkoxy, cyano, phenyl, phenoxy or benzyloxy; (C.sub.8-14 alkyl)carbonylamino or (C.sub.8-14 alkoxy)carbonylamino, and

R.sub.5 is C.sub.1-4 alkyl, allyl, (C.sub.1-3 alkyl)carbonyl, phenyl or phenyl monosubstituted by halo, C.sub.1-2 alkyl or C.sub.1-2 alkoxy.

6. A process according to claim 4 wherein

R.sub.1 is (C.sub.1-2 alkyl)carbonylamino, and

R.sub.2 is C.sub.1-2 alkoxy or 2-(C.sub.1-2 alkoxy)ethoxy.

7. A process according to claim 6 with the proviso that when one of R.sub.3 and R.sub.4 is hydrogen or C.sub.1-4 alkyl, the other is 2-(C.sub.8-14 alkoxy)carbonylethyl.

8. A process according to claim 7 wherein

R.sub.3 is hydrogen or C.sub.1-4 alkyl, and

R.sub.4 is 2-(C.sub.10-12 alkoxy)carbonylethyl, or

R.sub.3 is C.sub.10-12 alkyl, and

R.sub.4 is hydrogen or allyl.

9. A process according to claim 8 wherein the compound is applied to the textile substrate at a temperature above 120.degree. C.

10. A process according to claim 9 wherein the textile substrate comprises a linear aromatic polyester, cellulose 21/2 acetate, cellulose triacetate or a synthetic polyamide.

11. A process according to claim 10 wherein the textile substrate comprises a linear aromatic polyester.

12. A process according to claim 7 wherein the compound is ##STR25##

13. A textile substrate having applied thereto a monoazo compound of the formula ##STR26## wherein D is a diazo component radical of the 4-nitrophenyl series or the thienyl-2 series,

R.sub.1 is hydrogen; C.sub.1-2 alkyl; C.sub.1-2 alkoxy; formylamino; (C.sub.1-4 alkyl)carbonylamino; (C.sub.1-4 alkyl)carbonylamino the alkyl group of which is substituted by 1 to 3 substituents independently selected from halo, C.sub.1-3 alkoxy, cyano, phenyl, phenoxy and benzyloxy; (C.sub.2-4 alkenyl)carbonylamino; halo(C.sub.2-4 alkenyl)carbonylamino; benzoylamino; benzoylamino the phenyl group of which is substituted by 1 to 3 substituents independently selected from halo, C.sub.1-4 alkyl and C.sub.1-4 alkoxy; (C.sub.1-4 alkoxy)carbonylamino; (C.sub.1-4 alkoxy)carbonylamino the alkyl moiety of which is substituted by 1 to 3 substituents independently selected from halo, C.sub.1-3 alkoxy, cyano, phenyl, phenoxy and benzyloxy; (C.sub.8-14 alkyl)carbonylamino or (C.sub.8-14 alkoxy)carbonylamino,

R.sub.2 is C.sub.1-4 alkoxy or 2-(C.sub.1-4 alkoxy)ethoxy,

R.sub.3 is hydrogen, C.sub.1-4 alkyl, 2-(C.sub.8-14 alkoxy)carbonylethyl, 2-(C.sub.8-14 alkyl)carbonyloxyethyl or 2-(C.sub.8-14 alkoxy)carbonyloxyethyl, and

R.sub.4 is hydrogen, C.sub.1-4 alkyl, 2-cyanoethyl, 2-(C.sub.1-3 alkoxy)ethyl, 2-(C.sub.1-4 alkyl)carbonyloxyethyl, 2-(C.sub.1-4 alkoxy)carbonylethyl, 2-(C.sub.1-4 alkoxy)carbonyloxyethyl, C.sub.3-4 alkenyl, ##STR27## 2-(C.sub.8-14 alkyl)carbonyloxyethyl, 2-(C.sub.8-14 alkoxy)carbonylethyl or 2-(C.sub.8-14 alkoxy)carbonyloxyethyl,

wherein

R.sub.5 is C.sub.1-4 alkyl, allyl, (C.sub.1-3 alkyl)carbonyl, phenyl or phenyl substituted by 1 to 3 substituents independently selected from halo, C.sub.1-2 alkyl and C.sub.1-2 alkoxy, and

R.sub.6 is hydrogen, C.sub.1-4 alkyl or (C.sub.1-3 alkyl)carbonyl, with the proviso that one and only one of R.sub.1, R.sub.3 and R.sub.4 contains a C.sub.8-14 alkyl moiety.

14. A textile substrate according to claim 13 wherein

D is ##STR28## wherein R.sub.7 is hydrogen, cyano or halo,

R.sub.8 is hydrogen or chloro,

R.sub.9 is hydrogen or chloro, with the proviso that at least one of R.sub.8 and R.sub.9 is hydrogen,

R.sub.10 is cyano or nitro,

R.sub.12 is formyl, cyano, nitro, (C.sub.1-4 alkoxy)carbonyl or (C.sub.1-4 alkyl)carbonyl,

R.sub.13 is hydrogen, chloro, C.sub.1-3 alkyl or phenyl, and

R.sub.14 is cyano, nitro or (C.sub.1-4 alkoxy)carbonyl.

15. A textile substrate according to claim 14 wherein D is ##STR29##

16. A textile substrate according to claim 15 wherein

D is ##STR30## wherein R.sub.7 ' is chloro or bromo.

17. A textile substrate according to claim 16 wherein

R.sub.1 is hydrogen; C.sub.1-2 alkyl; C.sub.1-2 alkoxy; formylamino; (C.sub.1-4 alkyl)carbonylamino; (C.sub.1-4 alkyl)carbonylamino the alkyl group of which is monosubstituted by halo, C.sub.1-3 alkoxy, cyano, phenyl, phenoxy or benzyloxy; (C.sub.2-4 alkenyl)carbonylamino; halo(C.sub.2-4 alkenyl)carbonylamino; benzoylamino; benzoylamino the phenyl group of which is monosubstituted by halo, C.sub.1-4 alkyl or C.sub.1-4 alkoxy; (C.sub.1-4 alkoxy)carbonylamino; (C.sub.1-4 alkoxy)carbonylamino the alkyl moiety of which is monosubstituted by halo, C.sub.1-3 alkoxy, cyano, phenyl, phenoxy or benzyloxy; (C.sub.8-14 alkyl)carbonylamino or (C.sub.8-14 alkoxy)carbonylamino, and

R.sub.5 is C.sub.1-4 alkyl, allyl, (C.sub.1-3 alkyl)carbonyl, phenyl or phenyl monosubstituted by halo, C.sub.1-2 alkyl or C.sub.1-2 alkoxy.

18. A textile substrate according to claim 17 wherein

R.sub.1 is (C.sub.1-2 alkyl)carbonylamino,

R.sub.2 is C.sub.1-2 alkoxy or 2-(C.sub.1-2 alkoxy)ethoxy,

R.sub.3 is hydrogen or C.sub.1-4 alkyl, and

R.sub.4 is 2-(C.sub.10-12 alkoxy)carbonylethyl.

19. A textile substrate according to claim 13 comprising a linear aromatic polyester, cellulose 21/2 acetate, cellulose triacetate or a synthetic polyamide.

20. A textile substrate according to claim 19 comprising a linear aromatic polyester.