Basic or cationic sulphonic acid group-containing azo compounds, their synthesis and their use in dyeing substrates containing paper or cotton as well as dyestuff preparations thereof |
|||||||
| 申请号 | EP81810315.2 | 申请日 | 1981-08-04 | 公开(公告)号 | EP0051041B1 | 公开(公告)日 | 1984-08-01 |
| 申请人 | SANDOZ AG; | 发明人 | Pedrazzi, Reinhard; | ||||
| 摘要 | |||||||
| 权利要求 | |||||||
| 说明书全文 | The present invention relates to basic or cationic sulphonic acid group-containing azo compounds. French published Patent Application 2424305 (Sandoz) describes metal-free compounds of the formula The compounds of the present invention have surprisingly significantly superior light fastness properties and significantly superior fastness in certain wet properties to those of the French published Patent Application above. More particularly the present invention provides compounds of formula I,
In the compounds of formula I the m sulpho groups may react with the X groups to form internal salts of the type (XH)⊕SO⊖3 or X⊕S⊖3. The compounds of formula I have more basic and/or cationic groups than sulphonic acid groups, and the additional basic and/or cationic groups may form external salts to render the compounds water soluble. The diazo components of the compounds of the invention may be of the aromatic carbocyclic or heterocyclic series, such as of the aniline, aminonaphthalene, aminodibenzofuran or benzothiazole series. Preferred diazo components are those of the aniline series. The coupling components may be any of those standard for azo dyestuffs. Preferably the end coupling component is one of the naphthalene series which optionally contains 1 or 2 sulpho groups; more preferably such end coupling components are 1-naphthol-3- or -4-sulphonic acid, 5-, 6-, 7- or 8-amino-1-naphthol-3-sulphonic acid or 8-amino-1-naphthol-3,6-disulphonic acid and especially 6-amino-1-naphthol-3-sulphonic acid and derivatives thereof. It will be appreciated that the diazo and coupling components optionally bear metallizable groups such as -OH, -OCH3, -NH and -COOH etc. ortho to the azo group. Preferred metallizable groups are -OH and -OCH3. The polyazo chromophores of the compounds of the invention may be those in which the coupling components or diazo components of two mono and/or diazo compounds are directly bound to each other or are bound via a bridge member. In such compounds the components which are directly linked or linked through a bridge member are preferably of the phenylene, naphthylene or tetrahydronaphthylene series, most preferably of the 1,4-phenylene series. Representative metal complexes are copper, nickel and iron, with 1:1 copper complexes being most preferred especially when the copper is bound to an oxygen atom. The sulpho groups may be on any of the components or even bridge members, preferably 1 or 2 sulpho groups are located on coupling components. The groups ―Z1―X and Z2(X)2 may be bound to the diazo components and/or middle components when present, and/or end coupling components. The group -Z;-X hereinafter referred to as X where ―Z'1 is ―CO― or ―SO2― is preferably located on a diazo component. For diazo components of the aniline series the following positions may be given:- The groups ―Z"1―X or Z2―(X)2 hereinafter referred to as Xll where -Z;' is a group of formula (A) may be located on diazo components, middle components and/or end coupling components with compounds in which an end coupling component bears such a group being especially preferred. For diazo components of the aniline series the following position may be given In (a3) when a further substituent is present it is preferably located in the 2-, 4- or 6-position and when 2 further substituents are present they are preferably located in the 2,5-position. In (a4) preferably only 1 further substituent is present which is located in the 2- or 3-position. If the end coupling component bears a group Xll it is preferably of formula If the groups Xl or Xll are on middle components such middle component is preferably of the aniline series, preferably such group of the aniline series bears Xll in a position meta to the amino group. Alternatively, a middle component of the aniline series may bear in a position meta to the amino group a group ―NHCO(CH2)N(C1-4alkyl)2 or ―NHCO(CH2)1-3―N(C1-4atkyl)3 A⊖ where A⊖ is an anion. Any alkylene as Q is linear or branched, preferably any alkylene as Q is straight chain and most preferably is ethylene or propylene. Any alkyl as R1 and/or R2 is preferably methyl. Preferably R1 and R2 are R'1 and R'2 where each of R; and R'2, independently, is hydrogen or methyl with hydrogen being mose preferred. Preferably R3 and R4 are identical. Any C1-6-alkyl group is straight chain or branched. Any alkyl is preferably C1-4alkyl, with methyl and ethyl being most preferred. Any cyano or hydroxy substituted alkyl is preferably cyano- or hydroxy- or ethyl or -propyl. Any phenylalkyl as R3 and/or R4 is preferably benzyl in which the phenyl nucleus is preferably unsubstituted. Any cycloalkyl is preferably cyclohexyl and any alkyl substituent on cycloalkyl is preferably methyl. When R3 and R4 together with the nitrogen atom form a heterocyclic ring they preferably form a pyrrolidine, piperidine or morpholine ring. R3 and R4 are preferably R'3 and R'4, where each of R'3 and R'4, independently, is hydrogen, linear or branched C1-6alkyl, linear 2- or 3-hydroxyethyl or -propyl, benzyl or together with the N-atom they form a pyrrolidine, piperidine or morpholine ring. More preferably each of R3 and R4 is R"3 and R"4 , where R"3 and R"4 , independently, is hydrogen, linear or branched C1-4alkyl, 2-hydroxyethyl or together with the N-atom they form a piperidine or morpholine ring; most preferably R3 and R4 are R"'3 and R"'4, where each of R"'3 and R'"4 , independently, is methyl or ethyl. The groups R5 and R6 are preferably the same. The preferred significances for R3 and R4 also apply to R5 and R6 with the. exception that R5 and R6 are other than hydrogen. Any alkyl as R7 is preferably methyl or ethyl, especially methyl. Preferably, either R5 and R6, independently, have one of the preferred significances of R3 and R4 i.e. R'3, R'4, R"3, R"4 or R'"3 and R"'4 and R7 is R'7, where R'7 is methyl, ethyl or benzyl, more preferably methyl; or R5, R6 and R7 together with the N-atom signify a pyridinium cation. Belonging to the cation ―NR2―Q―NR5R6R7, is either a SO3⊖ already present in the molecule or any non-chromophoric anion Ae which may be organic or inorganic. The nature of the anion A⊖ is not critical. Examples of representative anions A8 are chloride, bromide, iodide, lactate, acetate, formate, citrate, methylsulphate, ethylsulphate and hydrogensulphate. Preferred basic groups as X are
0 For the cationic group ―NR2―QNR5R6R7 the groups X'a to X'd are preferred i.e. ―NR'2―Q―NR'5R'6R'7 X'a where R'5 and R'6 have one of the significances of R3 and R'4, respectively ―NR'2―Q'―NR"5R"6R'7, X'b where Q' is as defined above, and R5" and R6" have one of the significances of R3" and R4" , respectively, and ―NR'2―(CH2)2-6―NR"5R"6R'7 X'c ―NR'2―(CH2)2-3―NR"'5R"'6R'7 X'd in which R"'5 and R"'6 , have one of the significances of R"'3 and R"'4 , respectively. More preferably the cationic group is Xe where Xe is. When Y is an aliphatic amino group it is preferably a monoalkyl- or dialkylamino group in which the alkyl group contains 1 to 4 carbon atoms and is straight chain or branched and is optionally substituted by halogen (preferably chlorine or bromine), phenyl or preferably hydroxy. Any cycloaliphatic amine radical as Y is preferably a C5-6cycloalkylamino group. Any aromatic amine radical as Y is preferably an aniline radical in which the phenyl ring is optionally substituted by 1 or 2 substituents selected from the group consisting of halogen (preferably chlorine), C1-4alkyl, C1-4alkoxy, hydroxy or phenoxy. Any heterocyclic amine radical as Y is preferably morpholine which is bound through the N-atom. Each Y, independently, is preferably Ya, where Ya is Cl, OH, NH2, mono-C1-4alkylamino, 2-, 3- or 4-hydroxy-C2-4alkylamino, di-C1-2alkylamino, bis [2-, 3- or 4-hydroxy-C2-4alkyl]amino, anilino or morpholino, more preferably each Y, independently, is Yb, where Yb is Cl, OH, NH2, mono-C1-2alkylamino, 2-, 3- or 4-hydroxy-C2-4alkylamino or bis[2-, 3- or 4-hydroxy-C2-4alkyl]amino. Each X,, independently, is preferably Xla, where Xla is ―CO―Xa, ―CO―X'a, ―SO2―Xa or ―SO2―X'a, more preferably Xlb as ―CO―Xb, ―CO―X'b, ―SO2―Xb or ―SO2―X'b, even more preferably Xlc as ―CO―Xc or ―CO―X'c and especially Xld as ―CO―Xd or ―CO―X'd in which R'2 is preferably hydrogen, and -CO-Xd is preferably Xle' where Xle is ―CO―Xe. Each Xll, independently, is preferably Xlla or X'lla, where Xlla is The preferred halogen is chlorine. Preferred complexes are of formula I' Also preferred are complexes or formula II,
Further preferred complexes are of formula IIa
Preferably R8 is R'8, where R'8 is hydrogen, chlorine, methyl, methoxy, ―SO2NH2, or ―CONH2. More preferably Ra is R"8, where R"8 is hydrogen, chlorine, methyl or methoxy, most preferably hydrogen.
Preferred compounds of formula IIa are
Preferably R11 is R'11, where R'11 is hydrogen, chlorine, methyl, methoxy, acetylamino, benzoylamino, ―SO2NH2 or ―CONH2; more preferably R11 is R"11, where R"11 is hydrogen, chlorine, methyl, methoxy, acetylamino or benzoylamino, most preferably hydrogen.
Preferred compounds of formula Ilb are
Further preferred complexes are of formula llc, Preferred compounds of formula llc are
Also preferred complexes are those of formulae IIIa and IIIb
Preferably, in complexes of formulae IIIa and IIIb d is 0 where Xllz is directly attached to the naphthalene ring. Z3 is preferably Z'3, where Z'3 is a direct bond, ―(CH2)2―, ―NHCO―, ―NHCONH― or ―NHCO(CH2)2CONH―. Further preferred compounds of formulae IIIa and IIIb are
Further preferred complexes are of formula IV,
In the compounds of formula IV preferably each Z'd is the same and R8 is the same as R8a. Any Xllb or Xlle as Zd is preferably in the 4- or 5-position of the benzene ring. More preferably, the two azo compounds linked together by Z4 are symmetrical concerning the substituents and their positions. Preferred bridge members Z4 are those Z4a, where Z4a is ―NH―, ―NHCONH―, More preferably Z4 and Z4b, where Z4b is -NH-, -NHCONH-, ―NHCOCH2CH2CONH―, ―NHCOCH = CHCONH― or Even more preferably Z4 is Z4c, where Z4c is ―NH― ―NHCONH― ―NHCOCH = CHCONH― or Most preferably Z4 is Z4d, where Z4d is ―NH― or ―NHCONH―. Preferred compounds of formula IV are
each R8, independently, is hydrogen, C1-4alkyl, C1-4-alkoxy, halogen,―SO2NR1R1 or―CONR1R1; d is 0 or 1, each Xllz, independently, is Xllb or Xlle, and copper complexes thereof Preferred compounds and complexes of formula V are
Also preferred are compounds of formula Vla and complexes of formula Vlb, In the compounds and complexes of formulae Via and Vlb preferably the variables in both halves of the molecule are identical. Xllb or Xlle as Z'd are preferably in the 4- or 5-position. In the compounds of formula VIa preferably R15 is hydrogen, methyl or methoxy. Preferred compounds and complexes of formulae VIa and VIb are
Also preferred compounds are those of formula VII,
Preferred compounds of formula VII and complexes thereof are
Preferred compounds of formula VIII and complexes thereof are
The compounds of the invention are preferably in salt form. The invention also provides a process for the production of complexes of formula I, comprising reacting a compound of formula IX Metallization is effected in accordance with known methods. Preferably coppering is effected by oxidative coppering at 40 to 70°C and a medium having a pH of 4-7 in the presence of Cu(II) salts or copper powder with hydrogen peroxide or another conventional oxidation agent or more preferably by demethylation coppering preferably in a medium having a pH in the range of from 3-9 at temperatures up to the boil. The compounds of formula IX, may be prepared in accordance with known methods by diazotizing and coupling the corresponding starting materials. The disazoazoxy compounds may be obtained by reductive coupling of two nitro groups. For example disazoazoxy compounds of formula V may be formed from the corresponding nitroanilines by coupling followed by connecting the two monoazo parts with azoxy bridge by reducing the nitro groups in accordance with known methods, suitably using a mild reducing agent such as glucose and ,an alkaline medium having a temperature of 20 to 70°C, preferably 40 to 70°C. Trisazo or tetrakisazo compounds containing a bridge member may be made by diazotization and coupling with a compound containing such a bridge memberor by reacting two azo compounds with a compound yielding a bridging member. Trisazo compounds are suitably prepared by coupling on either side of tetrazo compound. It will be also be appreciated that the polyazo complexes of the invention may also be made by taking a metallized starting material and effecting a subsequent diazotization and coupling step. The monoazo or disazo compounds of formula IX are described in DOS 2,915,323. The compounds and complexes are isolated in accordance with known methods and may be converted to water soluble salts by reacting the basic compound with at least a stoichiometric amount of a mineral acid such as hydrochloric acid, sulphuric acid, nitric acid, phosphoric acid or preferably an organic acid such as formic acid, acetic acid, lactic acid, citric acid, glycolic acid and methane sulphonic acid. Further compounds containing free basic groups may be converted to quaternized compounds by reacting with corresponding alkylating agents. The complexes of the invention, in acid addition salt form or quaternary ammonium salt form, are dyestuffs and are useful for dyeing and printing fibres, filaments and textiles comprising or consisting of cellulose e.g. cotton, or preferably for dyeing and printing of paper, or leather, including low affinity vegetable-tanned leather, in accordance with known methods.. Cotton is preferably dyed by the exhaust method. Paper may be dyed in the stock and may be sized or unsized or paper sheet may be dip-dyed. The dyeings obtained, especially the paper dyeings have good fastnesses especially light-fastness, wetfastnesses and the exhaust bath is essentially colourless. The dyestuffs have good solubility especially in cold water and are substantially pH resistant. The dyestuffs have good substantivity and build-up practically quantitatively. The dyestuffs can be added to paper stock as a dry powder or granulate and can also be used in soft water without loss of yield. Fibrous materials containing wood pulp are dyed with the dyestuffs according to the invention in good and level quality. The dyed paper is both oxidatively and reductively bleachable, which is important for the recycling of waste and old paper. The complexes may be used in the form of dye preparations. Suitable liquid, preferably aqueous, preparations may be made in accordance with known methods by dissolving in solvents optionally with the addition of assistance such methods are described in French Patent 1,572,030. An example of a suitable liquid preparation is:- 100 parts dye,
The dyes may also be made up into granulates in accordance with known methods such as that described in French Patent 1,581,900.
The solid preparations may contain up to 10% residual moisture. The following Examples further serve to illustrate the invention. In the Examples all parts are by weight unless otherwise stated. 39.1 Parts of the red dye of formula 22.2 Parts of the red dye of formula In analogy with the procedure of Examples 1 and 2 further dyestuffs given in Table 1 can be prepared. They correspond to the formula
Component B is shown in unmetallized form. In the last column I the dye shade on paper is given whereby a = grey; b = grey-blue; c = brown-grey; d = blue; e = green-blue; f = steel-blue; g = reddish-blue; h = bordeaux; i=violet-blue; j = grey-violet; k=violet; 1 = red-brown and m = green. (This applies for all following Tables). 37.1 Parts of the red dye of formula In analogy with the procedure described in Example 24 further copper complexes given in Table 2 can be prepared. The dyes correspond to the formula The asterisk denotes the C-atom bound to the azo group. The dye of formula (A) The dye of formula (A) can be obtained as follows:
Using 3'- respectively 4'-aminobenzoyl-H-acid instead of H-acid and proceeding as described in Example 49, the corresponding copper complexes are obtained which, in acid addition salt form, dye paper in blue shades with good fastnesses, especially lightfastness. Using the diazo component of formula In analogy to the procedure of Example 52 further copper complexes given in Table 3 may be prepared. The dyes correspond to the formula 7.7 Parts of the violet dye of formula In analogy to the procedure of Example 68 further dyes given in Table 4 of general formula 150 Parts 2,4-bis-(3'-N,N-diethylaminopropylamino)-6-chloro-s-triazine are suspended in 500 parts water and adjusted to pH 6-7 with hydrochloric acid. 96 parts 2-amino-5-hydroxynaphthalene-7-sulfonic acid are added to the solution and the suspension is heated to 88 to 90°C. The pH is held at 2-2.2 by the addition of 60 parts crystalline sodium acetate. After 3 hours the condensation is complete. The coupling solution is cooled to room temperature. 48.8 parts 4,4'-diamino-3,3'-dimethoxy-1,1'-diphenyl are stirred in 300 parts water, 200 parts ice and 120 parts 30% hydrochloric acid. Then a concentrated aqueous solution of 30 parts sodium nitrite are added dropwise and stirring is effected for 1 hour. A clear yellow tetrazo solution is obtained. The coupling solution is set with 200 parts ice and coupled with the above tetrazo solution at pH 8. After 4 to 8 hours coupling is complete. The pH is adjusted to 6-7 with 40 parts glacial acetic acid and then a solution of 110 parts CuSO4· 5H2O, 300 parts water and 250 parts 25% ammonia are added and the temperature is raised to 95 to 97°C. After 5 hours coppering is complete. After cooling to room temperature the whole is made alkaline with 270 parts 30% sodium hydroxide and then filtered. The dye of formula In analogy to the procedure of Example 80 further dyes given in Table 5 of general formula 44.3 Parts 3-[2',4'-bis(3"-N,N-diethylaminopropylamino)-s-triazine-6'-yl-amino]aniline are dissolved in 500 parts water with the addition of 50 parts 30% hydrochloric acid and diazotized at 0 to 5°C with 27 parts 4N sodium nitrite solution. After 1 hour the excess nitrite is destroyed with amidosulphonic acid. 13.7 Parts 2-amino-1-methoxy-4-methylbenzol are added and the pH fixed at 4 by adding sodium acetate. After 3 to 4 hours coupling is complete. The reaction mixture is adjusted to acidic with hydrochloric acid and then 25 parts 4N sodium nitrite solution are added at room temperature. This diazo solution is added to a solution containing 23 parts 2,2'-dinaphthylamino-5,5'-dihydroxy-7,7-disulphonic acid in such a way that the pH remains at 7.5-8. The blue dye suspension is stirred for 3 hours and then coupling is complete. The precipitated dye which is filtered and dried corresponds to the formula In analogy to the procedure of Example 98 further unmetallized tetrakisazo dyes can be prepared employing instead of the diazo component having the group Z,,(2) in position 3 a diazo component with ZII(2) in position 4 or one with the group ZII(1 Z,,(3) to ZII(8) in position 3 or 4. They all dye paper in navy-blue shades. 10 Parts of the dyestuff powder of Example 98 are stirred in 200 parts water and dissolved with the addition of 4 parts glacial acetic acid. Subsequently, demethylation and coppering is carried out according to the process of Example 2. The precipitated dye is filtered and dried at 60°C in vacuo. The dye corresponding to formula In analogy to Example 114 further copper complexes are obtained by employing instead of the diazo component having the group ZII(2) in position 3, a diazo component with ZII(2) in position 4 or with the group ZII(1), ZII(3) to ZII(8) in position 3 or 4. These all dye paper in grey-blue shades. 83 Parts of 4-[2',4'-bis(3"-N,N-diethylaminopropylamino)-s-triazine-6'-yl-aminol aniline are dissolved in 500 parts water and 100 parts 30% hydrochloric acid and at 0 to 5°C diazotized with 47 parts of a 4N sodium nitrite solution. After 1 hour the excess nitrite is decomposed with amido sulphonic acid. 25.8 Parts 2-amino-1-methoxy-4-methylbenzol are added thereto and the whole is stirred; the pH is kept at 3.5 by the addition of approximately 100 parts sodium acetate. Coupling is complete after a short time. Stirring is effected for 2 hours. Subsequently, 50 parts 30% hydrochloric acid are added and a further 45 parts of 4N sodium nitrite solution are added dropwise at 15 to 20°C. After diazotization is ended the pH is brought down to 6.5. 45 Parts 2-amino-8-hydroxy-naphthalene-6-sulfonic acid are then added and the pH is raised to 8-9 with 30% sodium hydroxide solution whereby coupling takes place. A disazoamino compound of formula (a) 17 Parts of the compound (a) of Example 130 are suspended in 200 parts water and reacted with CuSO4·5H2O (dissolved in 50 parts water and 15 parts 25% aqueous ammonia). The whole is heated to 95 to 97°C and is stirred at this temperature for 7 hours. The so-obtained copper complex is filtered hot and a wet presscake is obtained which is stirred in 250 parts water and 15 parts 30% hydrochloric acid. Then 18 parts 1 N sodium nitrite solution are added dropwise over a period of 1 hour. After diazotization is completed 2 parts 1,3-diaminobenzene are added and the pH is adjusted to 3.5 to 4 with sodium acetate and the whole is allowed to couple for 3 hours. 100 Parts sodium chloride and then 15 parts 30% sodium hydroxide solution are added to precipitate the dye. After filtration the dye of formula 6,8 Parts 4,4'-diamino-3,3'-dimethoxy-'azobenzene are dissolved in 100 parts water with 12 parts hydrochloric acid and cooled to 0°.C. 12 Parts 4N sodium nitrite solution are added dropwise thereto. The tetrazo solution is added dropwise to a soda-alkaline solution containing 28 parts 2-[2',4'- bis(3"-N,N-diethylamino-propylamino)-s-triazine-6'-yl-amino]-5-hydroxynaphthalene-7-sulfonic acid whereby the pH is held at 8-8.5 by the addition of soda solution. A blue suspension is obtained which is stirred for several hours. Subsequently, 50 parts 30% sodium hydroxide solution are added and the dyestuff precipitates, is filtered and dried. The dyestuff of formula When the dyestuff of Example 132 is coppered by demethylation in accordance with the procedure described in Example 2 the corresonding copper complex is obtained, which, in acid addition salt form, dyes paper in blue shades with good fastnesses. 17 Parts 2-amino-1-methoxy-5-nitrobenzene are suspended in 300 parts water and 25 parts hydrochloric acid are added thereto. Subsequently, it is cooled to 0°C and 27 parts 4N sodium nitrite solution are added dropwise. Stirring is effected for 3 hours and the yellow solution is filtered clear. This diazo solution is added dropwise to a solution containing 56 parts 2-[2',4'-bis(3"-N,N-diethylaminopropylamino)-s-triazine-6'-yl-amino]-5-hydroxynaphthalene-7-sulfonic acid with the pH being held at 3-3,5 by the portionwise addition of sodium acetate. After 3 hours the diazo solution is no longer detectable. 20 Vol. % sodium chloride are added to the orange-red dyestuff solution and the pH is adjusted to c. 11 with sodium hydroxide solution. The precipitated dye is filtered. The wet paste obtained is stirred in 600 parts water. The whole is heated to 60°C and the pH is adjusted to 7,5-8 with hydrochloric acid upon which everything goes into solution. 30 Parts CUS04'5H20 (dissolved in 70 parts water and 50 parts ammonia) are added and the dyestuff suspension is heated to 95 to 98°C. After 2 to 3 hours coppering is complete. 50 Parts sodium hydroxide solution are added and a solution of 15 parts glucose and 50 parts water are added dropwise over 10 minutes. Stirring is effected for 1 hour at 90°C and the whole is cooled to room temperature. The precipitated dye is filtered and dried. The dye of formula Proceeding as described in Example 134 but reducing the dyestuff with glucose in alkaline medium before coppering, the corresponding uncoppered dyestuff is obtained which, in the acid addition salt form, dyes paper in violet-blue shades with good wet-fastnesses. By effecting coppering by demethylation the dye can be converted to the copper complex which is identical with Example 134. In analogy with the procedures described in Examples 132 to 135 further metal-free respectively metallized dyes can be obtained. The dyes are given in Table 6 and correspond in metal-free form to formula In Table 6 the asterisk denotes the C-atom bound to the azo group. 28 parts of the compound of formula 16 Parts 5-aminobenzene-1,3-dicarboxylic acid-di-(3'-N',N'-dimethylaminopropyl)-amide are stirred into 200 parts water and are dissolved with 30 parts of 30% hydrochloric acid. 100 Parts ice are added and 12 parts 4N sodium nitrite solution are added dropwise. The excess nitrite is decomposed with amido sulphonic acid. 7 Parts of 1-amino-2,5-dimethoxybenzene are added to the weakly yellow diazo solution whereupon a yellow-red dyestuff solution is formed. After 15 minutes the pH is adjusted to 4 by the addition of sodium acetate. Coupling is complete after a further 2 hours. The dye is isolated by the addition of 100 parts 30% sodium hydroxide solution and is subsequently dissolved in 400 parts water and 25 parts 30% hydrochloric acid. 11 Parts 4N sodium nitrite solution are added and stirring is effected for 1 hour. 15 Parts 2-phenylamino-5-hydroxynaphthalene-7-sulfonic acid are stirred in 600 parts water and the pH is adjusted to 9 with 30% sodium hydroxide solution. The above diazo solution is added thereto and the pH is kept at 9 with sodium hydroxide. Coupling is finished after a short time and the dyestuff precipitates. The dye is suction filtered and stirred in 600 parts water. Then 12 parts CUS04'5H,O (dissolved in 200 parts water and 150 parts 25% aqueous ammonia) are added, the suspension obtained is heated to 97 to 98°C. After 8 hours coppering is complete and the dyestuff which is filtered and is obtained in the form of a wet presscake, is of formula 30.2 Parts of the dyestuff powder of Example 80 are stirred in 500 parts water and reacted in 2.4 parts glacial acetic acid. The dye goes completely into solution. Subsequently, the dyestuff solution is evaporated to dryness. The dyestuff which corresponds to the formula Instead of employing the glacial acetic acid of Example 161 hydrochloric acid, sulphuric acid, phosphoric acid, formic acid, lactic acid and other inorganic or preferably organic acids can be used for forming external salts. The dyes of the above Examples may also be converted to the acid addition salt form in analogous manner. 80 Parts of the dyestuff salt of Example 161 are added at room temperature to a solution of 20 parts dextrin, 20 parts glacial acetic acid and 500 parts water and are stirred to a homogeneous suspension. By spray drying blue granulates are obtained which are well soluble in water and dye paper in blue shades. The dyes of the other Examples can also be converted to granulates in analogous manner. 200 Parts of the dye presscake of Example 80 are stirred in 440 parts water and the pH is adjusted to 5 with 34 parts glacial acetic acid. The so-obtained solution is heated to 80°C and is filtered clear (employing kieselgur of Hyflo). After cooling 700 parts of a ready-to-use dyestuff solution is obtained, which is storage stable over several months both in cool and warm atmospheres. The dyes of the other Examples can be converted to stable liquid preparations in analogous manner. 70 Parts of chemically bleached sulphite cellulose obtained from pinewood and 30 parts of chemically bleached sulphite cellulose obtained from birchwood are ground in 2000 parts of water in a Hollander. 0.5 Parts of the dyestuff from Example 80 (as an acid addition salt, e.g. according to Example 161) are sprinkled into this pulp. Paper is produced from this pulp after mixing for 20 minutes. The absorbent paper which is obtained in this manner is dyed in a blue shade. The waste water is practically colourless. 0.5 Parts of the dyestuff from Example 80 (as an acid addition salt, e.g. according to Example 161) are dissolved in 100 parts of hot water and cooled to room temperature. This solution is added to 100 parts of chemically bleached sulphite cellulose which have been ground in a Hollander with 200 parts of water. Sizing takes place after thorough mixing for 15 minutes. The paper which is produced from this material has a blue shade and good light- and wet-fastnesses. An absorbent length of unsized paper is drawn at 40-50°C through a dyestuff solution having the following composition:
The excess dyestuff solution is squeezed out through two rollers. The dried length of paper is dyed in a blue shade. The dyestuffs of the remaining Examples may also be used for dyeing according to Application Examples A to C in the acid addition salt form or in the form of solid or liquid preparations. 100 Parts freshly tanned and neutralised chrome leather are agitated for 30 minutes in a vessel with a dyebath of 250 parts water at 55°C and 0.5 parts of the dyestuff of Examples 1, 2 or 80, in acid addition salt form, and then treated in the same bath for 30 minutes with 2 parts of an anionic fatty liquor based on sulphonated train oil. The leather is then dried and prepared in the normal way, giving a leather evenly dyed in a grey-violet (grey-blue and blue, respectively) shade. Other low affinity vegetable-tanned leathers can similarly be dyed by known methods. 2 Parts of the dyestuff of Example 2 in acid addition salt form are dissolved in 4000 parts demineralised water at 40°C. 100 Parts of a pre-wetted cotton textile substrate are added, and the bath is raised to boiling point over 30 minutes and held at the boil for 1 hour. After rinsing and drying, a greyish-blue dyeing is obtained having good light- and wet-fastnesses. The dye exhausts practically quantitavely, and the waste water is almost colourless. |
||||||
