CH444342A - Process for the preparation of reactive monoazo dyes - Google Patents
Process for the preparation of reactive monoazo dyesInfo
- Publication number
- CH444342A CH444342A CH1169865A CH1169865A CH444342A CH 444342 A CH444342 A CH 444342A CH 1169865 A CH1169865 A CH 1169865A CH 1169865 A CH1169865 A CH 1169865A CH 444342 A CH444342 A CH 444342A
- Authority
- CH
- Switzerland
- Prior art keywords
- monoazo dyes
- alkyl
- parts
- alkoxy
- methyl
- Prior art date
Links
- 239000000975 dye Substances 0.000 title claims description 17
- NYGZLYXAPMMJTE-UHFFFAOYSA-M metanil yellow Chemical group [Na+].[O-]S(=O)(=O)C1=CC=CC(N=NC=2C=CC(NC=3C=CC=CC=3)=CC=2)=C1 NYGZLYXAPMMJTE-UHFFFAOYSA-M 0.000 title claims description 7
- 238000000034 method Methods 0.000 title claims description 5
- 238000002360 preparation method Methods 0.000 title description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- 125000000217 alkyl group Chemical group 0.000 claims description 9
- 125000003545 alkoxy group Chemical group 0.000 claims description 8
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 6
- 229910052736 halogen Inorganic materials 0.000 claims description 5
- 150000002367 halogens Chemical class 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 150000002431 hydrogen Chemical class 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- 150000005840 aryl radicals Chemical class 0.000 claims description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052794 bromium Inorganic materials 0.000 claims description 2
- -1 carboxylic acid ester radical Chemical class 0.000 claims description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims 1
- 150000002170 ethers Chemical class 0.000 claims 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 9
- 239000000243 solution Substances 0.000 description 6
- HRQGCQVOJVTVLU-UHFFFAOYSA-N bis(chloromethyl) ether Chemical compound ClCOCCl HRQGCQVOJVTVLU-UHFFFAOYSA-N 0.000 description 5
- 125000001424 substituent group Chemical group 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- VXIVSQZSERGHQP-UHFFFAOYSA-N chloroacetamide Chemical compound NC(=O)CCl VXIVSQZSERGHQP-UHFFFAOYSA-N 0.000 description 3
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 210000002268 wool Anatomy 0.000 description 2
- KWVPRPSXBZNOHS-UHFFFAOYSA-N 2,4,6-Trimethylaniline Chemical compound CC1=CC(C)=C(N)C(C)=C1 KWVPRPSXBZNOHS-UHFFFAOYSA-N 0.000 description 1
- XPKFTIYOZUJAGA-UHFFFAOYSA-N 2,5-diethoxyaniline Chemical compound CCOC1=CC=C(OCC)C(N)=C1 XPKFTIYOZUJAGA-UHFFFAOYSA-N 0.000 description 1
- JUIKUQOUMZUFQT-UHFFFAOYSA-N 2-bromoacetamide Chemical compound NC(=O)CBr JUIKUQOUMZUFQT-UHFFFAOYSA-N 0.000 description 1
- XGYLSRFSXKAYCR-UHFFFAOYSA-N 2-chloro-4-methylaniline Chemical compound CC1=CC=C(N)C(Cl)=C1 XGYLSRFSXKAYCR-UHFFFAOYSA-N 0.000 description 1
- IMPPGHMHELILKG-UHFFFAOYSA-N 4-ethoxyaniline Chemical compound CCOC1=CC=C(N)C=C1 IMPPGHMHELILKG-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- PQPNZWJBWNLEQL-UHFFFAOYSA-N CCOC(NC(C(OC1=CC=CC=C1)=O)=O)=O Chemical group CCOC(NC(C(OC1=CC=CC=C1)=O)=O)=O PQPNZWJBWNLEQL-UHFFFAOYSA-N 0.000 description 1
- GAWIXWVDTYZWAW-UHFFFAOYSA-N C[CH]O Chemical group C[CH]O GAWIXWVDTYZWAW-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 125000000738 acetamido group Chemical group [H]C([H])([H])C(=O)N([H])[*] 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000006149 azo coupling reaction Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 150000003857 carboxamides Chemical class 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000004312 hexamethylene tetramine Substances 0.000 description 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 229960004011 methenamine Drugs 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 150000002790 naphthalenes Chemical class 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B62/00—Reactive dyes, i.e. dyes which form covalent bonds with the substrates or which polymerise with themselves
- C09B62/44—Reactive dyes, i.e. dyes which form covalent bonds with the substrates or which polymerise with themselves with the reactive group not directly attached to a heterocyclic ring
- C09B62/465—Reactive dyes, i.e. dyes which form covalent bonds with the substrates or which polymerise with themselves with the reactive group not directly attached to a heterocyclic ring the reactive group being an acryloyl group, a quaternised or non-quaternised aminoalkyl carbonyl group or a (—N)n—CO—A—O—X or (—N)n—CO—A—Hal group, wherein A is an alkylene or alkylidene group, X is hydrogen or an acyl radical of an organic or inorganic acid, Hal is a halogen atom, and n is 0 or 1
- C09B62/47—Azo dyes
- C09B62/473—Monoazo dyes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung reaktiver Monoazofarbstoffe Gegenstand der Erfindung ist ein Verfahren zur Herstellung reaktiver Monoazofarbstoffe der Formel
EMI0001.0005
worin Hal Chlor oder Brom, R1 und R2 Wasserstoff, Alkyl oder Alkoxy, R3 Wasserstoff, Alkyl oder Alkoxy oder,
wenn R1 und/oder R2 für Alkyl oder A.lkoxy stehen, auch Halogen, R4 Methyl, Carboxyl oder einen gegebenenfalls substituierten Carbonsäureamid- oder Car- bonsäureester-Rest und A .einen Arylrest bedeuten.
Das Verfahren zu ihrer Herstellung ist dadurch ge- kennzeichnet, da.ss man Monoazofarbstoffe der Formel
EMI0001.0036
mit einer Mischung aus symmetrischem Dichlordimethyl- äther und einem Halogenacetamid in Schwefebäure zur Umsetzung bringt.
In den Monoazofarbstoffen der Formel (II) können die Substituenten folgende chemische Gruppen be deuten: R1 und R2 Wasserstoff oder ein niedermolekulares Alkyl oder Alkoxy, vorzugsweise jedoch Methyl, Meth- oxy oder Äthoxy, R3 einen.
Substituenten gleicher Art wie R1 und R2, ausserdem auch Halogen, vorzugsweise Chlor, unter der Bedingung, dass mindestens einer der Substituenten R1 und R2 Alkyl oder Alkoxy ist, R4 Methyl, Carboxyl, Carbäthoxy, Carbophenoxy,
Carbonsäureamid mit oder ohne N Substituenten, wie z. B. Methyl, Äthyl, Hydroxyäthyl und Phenyl, A einen Arylrest der Benzol- oder Naphthalin- reihe, der ausser der in der Formel bereits angeführten Sulfonsäuregruppe noch weitere Substituenten tragen kann, wie z.
B.. Alkyl, (Methyl, Äthyl), Halogen (C1, Br), -S03H, -CN und NH-Acyl (NH-CO-CH3, NH-CO-CH2-C1).
Typische Farbstoffe der Formel (II), wie sie für die vorliegende Erfindung Verwendung finden können, sind die Produkte der Azokupplung von diazotierten Aminen, wie z. B.
Aminobenzol, 4-Methyl , 2,4- oder 2,5-Dimethyl-, 2,4,6-Trimethyl-l-aminobenzol, 2-Chlor-4-methyl-l-aminobenzol, 4-Methoxy- oder 4 Äthoxy-l-aminobenzol, 2,5-Diäthoxy-l-aminobenzol, 2-Chlor-4-methoxy- oder -4-äthoxy-l-aminobenzol, mit Pyrazalbnen, wie z. B.
1-Phenyl-3-m!ethyl-5-pyrazalon-2'-, -3'- bzw. -4'-sulfons,äure oder -2',4'- bzw. -2',5'-d'isulfonsäure, 1-(2',5'-Dichi!or)-phenyl-3-methyl-5-pyrazolon- 4'-sulfonsäure, 1-(2'-Chlor-6'-methyl)-phenyl-3-methyl-5-pyrazolon- 4'-sulfonsäure, 1-Phenyl-3-carboxy-5-pyrazolon-4'-sulfons:
äure Die Umsetzung des Farbstoffs der Formel (1I) mit den Halogenacetamiden und- dem symmetrischen Di- chlordimethyläther führt man zweckmässig in dar Weise aus, dass man eine Lösung oder Suspension des Farb stoffes in Schwefelsäure mit höchstens <B>30%</B> Wasser gehalt mit einer Lösung von Halogenacetamid und sym metrischem Dichlordimethyl.äther in konzentrierter oder wasserfreier Schwefelsäure während Reaktionszeiten von einer Stunde bis zu zwei Tagen bei Temperaturen von 0 bis 30 C behandelt.
Als Halogenacetamid sind besonders die Monohalogenacetarnide geeignet, wie z. B. Bromacetamid oder vorzugsweise Chloracetamid.
Nach Beendigung der Kondensation kann die schwe felsaure Masse auf Eis und Wasser gegossen, dann gegebenenfalls ausgesalzen, abgesaugt, mit einer Salz lösung neutral gewaschen und getrocknet werden.
Die erfindungsgemäss erhältlichen Farbstoffe gehen eine. chemische Bindung mit der Faser ein und färben Wolle, Seide, Leder, synthetische Polyamidfasern und Fasern aus natürlicher und regenerierter Cellulose in gelben Tönen von hervorragender Licht- und Nass- echtheit.
In dem folgenden Beispiel bedeuten die Teile Ge- wichtsteile, die Prozente Gewichtsprozente, und die Temperaturen sind in Celsiusgraden angegeben.
<I>Beispiel</I> 9,3 Teile Chloracetamid werden in 70 Teilen kon zentrierter Schwefelsäure bei 10-15 gelöst. Man kühlt die Lösung auf 0-5 ab und lässt innerhalb von 30 Minuten 5,8 Teile symmetrischen Dichlordimethyläther zutropfen. Die erhaltene Mischung wird noch 1 Stunde bei 0-5 und hierauf 16-20 Stunden bei 10-15 ge rührt.
In einem weiteren Gefäss werden 45,5 Teile des Farbstoffes 1-(2',5'-Dichlorphenyl)-3-methyl-4-(2",5"-di- methylphenyliazo)-5-pyrazolon-4'=sulfonsäure bei 25-30 in 720 Teilen 75 % iger wässriger Schwefel säure angerührt und unter Kühlung bei 25-30 tropfen weise mit der oben hergestellten Lösung von Chlor- acetamid und Dichlordimethyläther versetzt.
Man fügt noch 12 Teile. Wasser zu und, lässt 16-20 Stunden rühren. Hierauf giesst man die dunkle Lösung auf Eis, filtriert -und löst den Farbstoff in Wasser, neutralisiert ihn mit Natriumhyd'roxydlösung und fällt ihn mit Koch salz wieder aus.
Nach der Filtration und Trocknung (40 /15 mm) erhält man einen Farbstoff, der Wolle und Polyamidfasern aus essigsaurem Bade in leuchtend gelben Tönen von hervorragender Nass- und Licht- echtheit anfärbt.
<I>Färbevorschrift</I> 2 Teile des obengenannten Farbstoffs werden in 4000 Teilen Wasser kalt gelöst und auf 40 erwärmt. Man gibt 2 Teile Essigsäure und, 3 Teile eines Ge misches aus einem polyoxäthylierten Fettamin und einem Al'kylpolygl'ykoläther zu und geht hierauf mit 100 Teilen eines Wollgewebes ein. Man treibt innert 15-20 Mi nuten zum Kochen und hält während 45-60 Minuten auf Kochtemperatur.
Hierauf gebt man bei 85-90 etwa 3 Teile 25 % iges. Ammoniak oder 3 Teile Hexamethylen- tetramin zu und behandelt während 20 Minuten bei 90 . Anschliessend spült man gründlich, indem man dem Spülwasser in. einer Passage etwas Essigsäure zusetzt, und trocknet.
Man erhält eine wasch-, schweiss- und walkechte sowie gut lichtechte, egale gelbe Färbung.
Process for the preparation of reactive monoazo dyes The invention relates to a process for the preparation of reactive monoazo dyes of the formula
EMI0001.0005
where Hal is chlorine or bromine, R1 and R2 are hydrogen, alkyl or alkoxy, R3 is hydrogen, alkyl or alkoxy or
if R1 and / or R2 are alkyl or alkoxy, they are also halogen, R4 are methyl, carboxyl or an optionally substituted carboxamide or carboxylic acid ester radical and A is an aryl radical.
The process for their preparation is characterized in that one monoazo dyes of the formula
EMI0001.0036
with a mixture of symmetrical dichlorodimethyl ether and a haloacetamide in sulfuric acid to implement.
In the monoazo dyes of the formula (II), the substituents can be the following chemical groups: R1 and R2 are hydrogen or a low molecular weight alkyl or alkoxy, but preferably methyl, methoxy or ethoxy, and R3 is one.
Substituents of the same type as R1 and R2, and also halogen, preferably chlorine, with the condition that at least one of the substituents R1 and R2 is alkyl or alkoxy, R4 is methyl, carboxyl, carbethoxy, carbophenoxy,
Carboxamide with or without N substituents, such as. B. methyl, ethyl, hydroxyethyl and phenyl, A is an aryl radical of the benzene or naphthalene series, which in addition to the sulfonic acid group already mentioned in the formula can carry further substituents, such as.
E.g. alkyl, (methyl, ethyl), halogen (C1, Br), -S03H, -CN and NH-acyl (NH-CO-CH3, NH-CO-CH2-C1).
Typical dyes of the formula (II), as they can be used for the present invention, are the products of the azo coupling of diazotized amines, such as. B.
Aminobenzene, 4-methyl, 2,4- or 2,5-dimethyl-, 2,4,6-trimethyl-1-aminobenzene, 2-chloro-4-methyl-1-aminobenzene, 4-methoxy- or 4-ethoxy- l-aminobenzene, 2,5-diethoxy-l-aminobenzene, 2-chloro-4-methoxy- or -4-ethoxy-l-aminobenzene, with pyrazalbnene, such as. B.
1-phenyl-3-m! Ethyl-5-pyrazalone-2'-, -3'- or -4'-sulfones, acid or -2 ', 4'- or -2', 5'-d ' isulfonic acid, 1- (2 ', 5'-dichloro) -phenyl-3-methyl-5-pyrazolone-4'-sulfonic acid, 1- (2'-chloro-6'-methyl) -phenyl-3-methyl -5-pyrazolone-4'-sulfonic acid, 1-phenyl-3-carboxy-5-pyrazolone-4'-sulfones:
acid The reaction of the dye of the formula (1I) with the haloacetamides and the symmetrical dichlorodimethyl ether is expediently carried out in the manner that a solution or suspension of the dye in sulfuric acid with a maximum of 30% Water content treated with a solution of halogen acetamide and symmetrical dichlorodimethyl ether in concentrated or anhydrous sulfuric acid for reaction times of one hour to two days at temperatures of 0 to 30 C.
The monohaloacetamides are particularly suitable as haloacetamide, such as. B. bromoacetamide or preferably chloroacetamide.
After the condensation has ended, the sulphurous mass can be poured onto ice and water, then optionally salted out, filtered off with suction, washed neutral with a salt solution and dried.
The dyes obtainable according to the invention go one. chemical bond with the fiber and dye wool, silk, leather, synthetic polyamide fibers and fibers made from natural and regenerated cellulose in yellow tones with excellent light and wet fastness.
In the following example, the parts are parts by weight, the percentages are percentages by weight, and the temperatures are given in degrees Celsius.
<I> Example </I> 9.3 parts of chloroacetamide are dissolved in 70 parts of concentrated sulfuric acid at 10-15. The solution is cooled to 0-5 and 5.8 parts of symmetrical dichlorodimethyl ether are added dropwise over the course of 30 minutes. The mixture obtained is stirred for a further 1 hour at 0-5 and then for 16-20 hours at 10-15.
45.5 parts of the dye 1- (2 ', 5'-dichlorophenyl) -3-methyl-4- (2 ", 5" -dimethylphenyliazo) -5-pyrazolone-4' = sulfonic acid are added in a further vessel 25-30 in 720 parts of 75% strength aqueous sulfuric acid and mixed dropwise with cooling at 25-30 with the above prepared solution of chloroacetamide and dichlorodimethyl ether.
You add 12 parts. Add water and let stir for 16-20 hours. The dark solution is then poured onto ice, filtered and the dye is dissolved in water, neutralized with sodium hydroxide solution and precipitated again with sodium chloride.
After filtration and drying (40/15 mm) a dye is obtained which dyes wool and polyamide fibers from an acetic acid bath in bright yellow shades of excellent wet and light fastness.
<I> Dyeing instructions </I> 2 parts of the above dye are dissolved in 4000 parts of cold water and heated to 40%. 2 parts of acetic acid and 3 parts of a mixture of a polyoxyethylated fatty amine and an Al'kylpolygl'ykoläther and then goes with 100 parts of a woolen fabric. It is brought to the boil within 15-20 minutes and kept at boiling temperature for 45-60 minutes.
Then add about 3 parts of 25% at 85-90. Ammonia or 3 parts of hexamethylene tetramine and treated for 20 minutes at 90. Then rinse thoroughly by adding a little acetic acid to the rinsing water in one passage, and drying.
A wash-, sweat- and squeeze-fast as well as lightfast, level yellow dyeing is obtained.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1169865A CH444342A (en) | 1961-03-09 | 1961-03-09 | Process for the preparation of reactive monoazo dyes |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH287861A CH401302A (en) | 1961-03-09 | 1961-03-09 | Process for the preparation of reactive monoazo dyes |
| CH1169865A CH444342A (en) | 1961-03-09 | 1961-03-09 | Process for the preparation of reactive monoazo dyes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH444342A true CH444342A (en) | 1967-09-30 |
Family
ID=25691615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH1169865A CH444342A (en) | 1961-03-09 | 1961-03-09 | Process for the preparation of reactive monoazo dyes |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH444342A (en) |
-
1961
- 1961-03-09 CH CH1169865A patent/CH444342A/en unknown
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