EP0497238A1 - Process for dyeing of leather - Google Patents
Process for dyeing of leather Download PDFInfo
- Publication number
- EP0497238A1 EP0497238A1 EP92101257A EP92101257A EP0497238A1 EP 0497238 A1 EP0497238 A1 EP 0497238A1 EP 92101257 A EP92101257 A EP 92101257A EP 92101257 A EP92101257 A EP 92101257A EP 0497238 A1 EP0497238 A1 EP 0497238A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- leather
- weight
- dyeing
- dyes
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/02—Material containing basic nitrogen
- D06P3/04—Material containing basic nitrogen containing amide groups
- D06P3/32—Material containing basic nitrogen containing amide groups leather skins
- D06P3/3206—Material containing basic nitrogen containing amide groups leather skins using acid dyes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/02—Material containing basic nitrogen
- D06P3/04—Material containing basic nitrogen containing amide groups
- D06P3/32—Material containing basic nitrogen containing amide groups leather skins
- D06P3/3246—Material containing basic nitrogen containing amide groups leather skins using vat, sulfur or indigo dyes
Definitions
- the invention relates to a method for dyeing leather by the exhaust method.
- pigments and sulfur dyes play a subordinate role in leather dyeing after the exhaust process.
- pigments and sulfur dyes play a subordinate role in leather dyeing after the exhaust process.
- pigments and sulfur dyes play a subordinate role in leather dyeing after the exhaust process.
- pigments and sulfur dyes play a subordinate role in leather dyeing after the exhaust process.
- pigments and sulfur dyes play a subordinate role in leather dyeing after the exhaust process.
- pigments and sulfur dyes play a subordinate role in leather dyeing after the exhaust process.
- pigments and sulfur dyes play a subordinate role in leather dyeing after the exhaust process.
- pigments and sulfur dyes play a subordinate role in leather dyeing after the exhaust process.
- pigments and sulfur dyes play a subordinate role in leather dyeing after the exhaust process.
- pigments and sulfur dyes play a subordinate role in leather dyeing after the exhaust process.
- pigments and sulfur dyes play a subordinate role in leather dyeing after the exhaust process.
- the invention thus relates to a process for dyeing leather by the exhaust process, which is characterized in that a pigment dispersion, the color bodies of which are not dispersed sulfur dyes, and an aqueous solution of water-soluble sulfur dyes are allowed to act on the leather pretreated in the customary manner.
- the usual pretreatment of the leather before dyeing includes e.g. B. tanning and neutralization.
- the surprising advantage of the combined use of pigment dispersions and water-soluble sulfur dyes is a synergistic effect: the color in the cross-section succeeds with good coverage of the surface of the leather, and a color depth and brilliance are particularly evident, which in no case also results from the use of the individual coloring components can be achieved with a high amount of use.
- the light fastness and sweat fastness achieved are higher than those that can be achieved by the previously customary methods.
- the aqueous pigment dispersions used in the liquor usually have the following composition: 10-60% by weight, preferably 20-40% by weight of pigment, 2 to 30% by weight, preferably 4 to 12% by weight of dispersant, 0-30% by weight, preferably 5-12% by weight of solvent, 0 - 5% by weight, preferably 0.1 - 1% by weight of preservative, 30-70% by weight, preferably 35-55% by weight of water.
- the pigment consists of water-insoluble inorganic or organic material and comprises e.g. B. all common white, black and colored pigments, such as titanium dioxide, zinc oxide, barium sulfate, silicon dioxide, chrome oxide green, cobalt blue, ultramarine blue, iron blue, sienna brown, iron black, carbon black, azo pigments, lacquered azo pigments, phthalocyanine pigments, dioxazine pigments, pigment pigments, perylene pigment pigments, Triphenylmethane pigments, thioindigo pigments and polymethine pigments.
- the average grain size of the pigment is usually 20 to 1,000, in particular 100 to 500 nm.
- Suitable dispersants are compounds which have a molecular weight of 400 to 10,000 g / mol, preferably 500 to 5,000 g / mol, and which continue to be suitable are able to reduce the surface tension of the water due to their surface-active properties and contain surfactant structural elements in their molecules, such as polyether functions, carboxyl functions, sulfonic acid groups, amino functions or quaternary ammonium functions.
- Suitable dispersants are in particular alkylphenol oxyethylates (EP-A-0 065 751), polyether polyamines (EP-A-0 025 998) and oxyalkylation products, e.g. B. oxalkylated reaction products of glycidyl ethers with alkylamines (EP-A-0 017 189).
- Polar organic compounds for example organic compounds carrying OH groups and / or ethers, are suitable as solvents.
- Suitable preservatives are, for example, quaternary ammonium salts such as didecyldimethylammonium chloride, phenols such as 4-chloro-3-methylphenol or ortho-phenylphenol and heterocyclic compounds such as octylisothiazolin-3-one, isothiazoline, 1,2-benzisothiazolin-3-one and methyl benzimidazolylcarbamate.
- quaternary ammonium salts such as didecyldimethylammonium chloride
- phenols such as 4-chloro-3-methylphenol or ortho-phenylphenol
- heterocyclic compounds such as octylisothiazolin-3-one, isothiazoline, 1,2-benzisothiazolin-3-one and methyl benzimidazolylcarbamate.
- the commercially available water-soluble dyes are suitable as sulfur dyes, as are described, for example, in Melliand Textile Reports 12/1973, pages 1314 to 1327. These dyes include water-soluble pigments and Bunte salts (thiosulfuric acid derivatives).
- the pigment dispersion and the sulfur dye are applied either together in a liquor or separately in two successive steps, the order of the application being not critical.
- the sulfur dye can also consist of a mixture of different sulfur dyes, if appropriate a dye mixture of one or more sulfur dyes and one or more other water-soluble or water-dispersible dyes is used, the dye mixture optionally additionally containing the pigment dispersion.
- Other water-soluble dyes that can be combined with the water-soluble sulfur dye are acid dyes and direct dyes, e.g. B. sulfo group-containing azo dyes, metal complex dyes, nitro and nitroso dyes, carbonyl dyes, polymethine dye, phthalocyanine dyes and reactive dyes. These dyes have an anionic charge character.
- the leather prepared and pretreated in the usual way is dyed with the sulfur dye, optionally in the presence of the pigment dispersion and / or other water-soluble dyes customary in leather dyeing, by the exhaust process.
- the dyeing liquor is an aqueous solution which - based on the shaved weight of the leather - 20 to 400, in particular 50 to 200% water, 0.5 to 8, in particular 1.5 to 6%, sulfur dye and optionally 0.1 to 6, in particular Contains 0.1 to 3% of the pigment dispersion and / or 0.1 to 6, in particular 0.1 to 4%, further water-soluble dye.
- the temperature of this aqueous solution is 20 to 100, in particular 30 to 60 ° C.
- the entire staining time depends depends on the type of leather to be dyed and is 20 to 300, in particular 30 to 120 minutes.
- Customary additives are added to the liquor before, during and / or after dyeing. This is e.g. B. aids that promote the penetration of dyes and pigments that lead to a uniform application, so-called leveling agents, and reinforce the fixation of the dyes and pigments on the leather surface.
- Other common additives are wetting agents, color deepening agents and greasing agents.
- the entire dyeing process is ended by lowering the pH of the dyeing liquor, preferably with formic acid.
- the formic acid is allowed to act in the usual way for 10 to 60 minutes.
- the leather is finished in a manner known per se.
- Either the leather is pigmented with the pigment dispersion according to the invention after the dyeing process, and this aftertreatment can include simultaneous dyeing with water-soluble sulfur dye.
- this aftertreatment can include simultaneous dyeing with water-soluble sulfur dye.
- the final steps are retanning and then the so-called pot dyeing of the leather and fixing with conventional aids.
- the same or different colors and / or pigments can be used for pot coloring.
- the dyeing process according to the invention is for all types of leather, for. B. mineral tanned or vegetable tanned grain, suede, suede or nubuck leather of beef, goat, sheep or pork.
Abstract
Das Verfahren zum Färben von Leder nach dem Ausziehverfahren ist dadurch gekennzeichnet, daß man auf das in üblicher Weise vorbehandelte Leder Pigmentdispersion und wäßrige Lösung von Schwefelfarbstoff in einer Stufe oder nacheinander einwirken läßt. Es zeigt sich eine hohe Farbtiefe und Brillanz, die durch alleinigen Einsatz des Pigments bzw. des Schwefelfarbstoffs nicht erreicht werden.The process for dyeing leather by the exhaust process is characterized in that pigment dispersion and aqueous solution of sulfur dye are allowed to act in one step or in succession on the leather pretreated in the customary manner. It shows a high depth of color and brilliance that cannot be achieved by using only the pigment or the sulfur dye.
Description
Die Erfindung bezieht sich auf ein Verfahren zum Färben von Leder nach dem Ausziehverfahren.The invention relates to a method for dyeing leather by the exhaust method.
Leder werden üblicherweise mit wasserlöslichen Azofarbstoffen, wie sie beispielsweise in EP-A-0 377 409 beschrieben sind, gefärbt.Leather is usually dyed with water-soluble azo dyes, as described, for example, in EP-A-0 377 409.
Pigmente und Schwefelfarbstoffe spielen in der Lederfärbung nach dem Ausziehverfahren dagegen eine untergeordnete Rolle. Als Pigmente kommen in erster Linie Rußpigmente und Weißpigmente zum Einsatz, die jedoch in aller Regel nicht alleine, sondern in Kombination mit wasserlöslichen Azofarbstoffen eingesetzt werden.In contrast, pigments and sulfur dyes play a subordinate role in leather dyeing after the exhaust process. Primarily carbon black and white pigments are used as pigments, but these are generally not used alone, but in combination with water-soluble azo dyes.
Es wurde nun überraschend gefunden, daß sich Kombinationen von Dispersionen mit Pigmenten, die keine dispergierten Schwefelfarbstoffe umfassen, und wasserlöslichen Schwefelfarbstoffen hervorragend zum Färben von Leder nach dem Ausziehverfahren eignen.It has now surprisingly been found that combinations of dispersions with pigments which do not comprise dispersed sulfur dyes and water-soluble sulfur dyes are outstandingly suitable for dyeing leather using the exhaust process.
Gegenstand der Erfindung ist somit ein Verfahren zum Färben von Leder nach dem Ausziehverfahren, das dadurch gekennzeichnet ist, daß man auf das in üblicher Weise vorbehandelte Leder eine Pigmentdispersion, deren Farbkörper keine dispergierten Schwefelfarbstoffe sind, und eine wäßrige Lösung von wasserlöslichen Schwefelfarbstoffen einwirken läßt. Die übliche Vorbehandlung des Leders vor dem Färben umfaßt z. B. die Gerbung und die Neutralisation.The invention thus relates to a process for dyeing leather by the exhaust process, which is characterized in that a pigment dispersion, the color bodies of which are not dispersed sulfur dyes, and an aqueous solution of water-soluble sulfur dyes are allowed to act on the leather pretreated in the customary manner. The usual pretreatment of the leather before dyeing includes e.g. B. tanning and neutralization.
Der Nachteil der Färbung von Leder mit wasserlöslichen Schwefelfarbstoffen ohne den erfindungsgemäßen Zusatz von Pigmenten zeigt sich in der fehlenden Brillanz der Färbungen. Dagegen führt die Färbung von Leder alleine mit Pigmentdispersionen zu einer mangelnden Einfärbung im Querschnitt. Die Färbung fällt in aller Regel wenig brillant und wenig farbtief aus.The disadvantage of dyeing leather with water-soluble sulfur dyes without the addition of pigments according to the invention is evident in the lack of brilliance of coloring. On the other hand, the dyeing of leather with pigment dispersions alone leads to a lack of coloring in the cross section. The coloring is usually not brilliant and not very deep.
Der überraschende Vorteil des kombinierten Einsatzes von Pigmentdispersionen und wasserlöslichen Schwefelfarbstoffen besteht in einem synergistischen Effekt: Es gelingt die Durchfärbung im Querschnitt bei guter Abdeckung der Oberfläche des Leders und ganz besonders zeigt sich eine Farbtiefe und Brillanz, die in keinem Fall durch Einsatz der einzelnen Färbekomponenten auch bei hoher Einsatzmenge erreicht werden kann. Die erreichten Lichtechtheiten und Schweißechtheiten sind höher als die nach bisher üblichen Verfahren erreichbaren.The surprising advantage of the combined use of pigment dispersions and water-soluble sulfur dyes is a synergistic effect: the color in the cross-section succeeds with good coverage of the surface of the leather, and a color depth and brilliance are particularly evident, which in no case also results from the use of the individual coloring components can be achieved with a high amount of use. The light fastness and sweat fastness achieved are higher than those that can be achieved by the previously customary methods.
Die in der Flotte eingesetzten wäßrigen Pigmentdispersionen zeigen gewöhnlich folgende Zusammensetzung:
10 - 60 Gew.-%, vorzugsweise 20 - 40 Gew.-% Pigment,
2 - 30 Gew.-%, vorzugsweise 4 - 12 Gew.-% Dispergiermittel,
0 - 30 Gew.-%, vorzugsweise 5 - 12 Gew.-% Lösemittel,
0 - 5 Gew.-%, vorzugsweise 0,1 - 1 Gew.-% Konservierungsmittel,
30 - 70 Gew.-%, vorzugsweise 35 - 55 Gew.-% Wasser.The aqueous pigment dispersions used in the liquor usually have the following composition:
10-60% by weight, preferably 20-40% by weight of pigment,
2 to 30% by weight, preferably 4 to 12% by weight of dispersant,
0-30% by weight, preferably 5-12% by weight of solvent,
0 - 5% by weight, preferably 0.1 - 1% by weight of preservative,
30-70% by weight, preferably 35-55% by weight of water.
Das Pigment besteht aus wasserunlöslichem anorganischem oder organischem Material und umfaßt z. B. alle üblichen Weiß-, Schwarz- und Buntpigmente, wie Titandioxid, Zinkoxid, Bariumsulfat, Siliciumdioxid, Chromoxidgrün, Kobaltblau, Ultramarinblau, Eisenblau, Siena-Braun, Eisenschwarz, Ruß, Azopigmente, verlackte Azopigmente, Phthalocyaninpigmente, Dioxazinpigmente, Perylentetracarbonsäurepigmente, Chinacridonpigmente, Triphenylmethanpigmente, Thioindigopigmente und Polymethinpigmente. Die durchschnittliche Korngröße des Pigments liegt gewöhnlich bei 20 bis 1.000, insbesondere 100 bis 500 nm.The pigment consists of water-insoluble inorganic or organic material and comprises e.g. B. all common white, black and colored pigments, such as titanium dioxide, zinc oxide, barium sulfate, silicon dioxide, chrome oxide green, cobalt blue, ultramarine blue, iron blue, sienna brown, iron black, carbon black, azo pigments, lacquered azo pigments, phthalocyanine pigments, dioxazine pigments, pigment pigments, perylene pigment pigments, Triphenylmethane pigments, thioindigo pigments and polymethine pigments. The average grain size of the pigment is usually 20 to 1,000, in particular 100 to 500 nm.
Als Dispergiermittel kommen Verbindungen in Frage, die ein Molekulargewicht von 400 bis 10.000 g/mol, vorzugsweise 500 bis 5.000 g/mol aufweisen, die weiterhin aufgrund ihrer oberflächenaktiven Eigenschaften in der Lage sind, die Oberflächenspannung des Wassers zu verringern und die in ihren Molekülen tensidische Strukturelemente enthalten, wie beispielsweise Polyetherfunktionen, Carboxylfunktionen, Sulfosäuregruppen, Aminofunktionen oder quaternäre Ammoniumfunktionen.Suitable dispersants are compounds which have a molecular weight of 400 to 10,000 g / mol, preferably 500 to 5,000 g / mol, and which continue to be suitable are able to reduce the surface tension of the water due to their surface-active properties and contain surfactant structural elements in their molecules, such as polyether functions, carboxyl functions, sulfonic acid groups, amino functions or quaternary ammonium functions.
Geeignete Dispergiermittel sind insbesondere Alkylphenoloxethylate (EP-A-0 065 751), Polyetherpolyamine (EP-A-0 025 998) und Oxalkylierungsprodukte, z. B. oxalkylierte Umsetzungsprodukte von Glycidylethern mit Alkylaminen (EP-A-0 017 189).Suitable dispersants are in particular alkylphenol oxyethylates (EP-A-0 065 751), polyether polyamines (EP-A-0 025 998) and oxyalkylation products, e.g. B. oxalkylated reaction products of glycidyl ethers with alkylamines (EP-A-0 017 189).
Als Lösemittel kommen polare organische Verbindungen, beispielsweise OH-Gruppen tragende organische Verbindungen und/oder Ether in Frage.Polar organic compounds, for example organic compounds carrying OH groups and / or ethers, are suitable as solvents.
Geeignete Lösemittel sind beispielsweise Verbindungen der Formel
R¹ - O - (X-O)m- R²
Es bedeuten:
- R¹
- Wasserstoff und/oder Alkyl mit 1 bis 35 C-Atomen, beispielsweise Talgfettalkyl, Palmfettalkyl, Cocosfettalkyl, Rapsölalkyl, Fischölalkyl,
- X
- -CH₂-CH₂- und/oder -CH₂-CH(CH₃)-,
- m
- eine Zahl von 1 bis 50, vorzugsweise 1 bis 25 und
- R²
- Wasserstoff, Benzoyl, Naphthoyl.
R¹ - O - (XO) m - R²
It means:
- R¹
- Hydrogen and / or alkyl having 1 to 35 carbon atoms, for example tallow fatty alkyl, palm fatty alkyl, coconut fatty alkyl, rapeseed oil alkyl, fish oil alkyl,
- X
- -CH₂-CH₂- and / or -CH₂-CH (CH₃) -,
- m
- a number from 1 to 50, preferably 1 to 25 and
- R²
- Hydrogen, benzoyl, naphthoyl.
Geeignete Konservierungsmittel sind beispielsweise quaternäre Ammoniumsalze wie Didecyldimethylammoniumchlorid, Phenole wie 4-Chlor-3-methyl-phenol oder ortho-Phenylphenol und heterocyclische Verbindungen wie Octylisothiazolin-3-on, Isothiazolin, 1,2-Benzisothiazolin-3-on und Benzimidazolyl-carbaminsäuremethylester.Suitable preservatives are, for example, quaternary ammonium salts such as didecyldimethylammonium chloride, phenols such as 4-chloro-3-methylphenol or ortho-phenylphenol and heterocyclic compounds such as octylisothiazolin-3-one, isothiazoline, 1,2-benzisothiazolin-3-one and methyl benzimidazolylcarbamate.
Als Schwefelfarbstoffe kommen die handelsüblichen wasserlöslichen Farbstoffe in Frage, wie sie beispielsweise in Melliand Textilberichte 12/1973, Seite 1314 bis 1327 beschrieben werden. Zu diesen Farbstoffen gehören wasserlösliche Pigmente und Bunte-Salze (Thioschwefelsäure-Derivate).The commercially available water-soluble dyes are suitable as sulfur dyes, as are described, for example, in Melliand Textile Reports 12/1973, pages 1314 to 1327. These dyes include water-soluble pigments and Bunte salts (thiosulfuric acid derivatives).
Der Auftrag der Pigmentdispersion und des Schwefelfarbstoffes erfolgt entweder gemeinsam in einer Flotte oder getrennt in zwei aufeinanderfolgenden Schritten, wobei die Reihenfolge des Auftrags nicht kritisch ist. Der Schwefelfarbstoff kann auch aus einem Gemisch verschiedener Schwefelfarbstoffe bestehen, gegebenenfalls wird ein Farbstoffgemisch aus einem oder mehreren Schwefelfarbstoffen und einem oder mehreren anderen wasserlöslichen bzw. in Wasser dispergierbaren Farbstoffen verwendet, wobei das Farbstoffgemisch gegebenenfalls zusätzlich die Pigmentdispersion enthält. Weitere wasserlösliche Farbstoffe, die mit dem wasserlöslichen Schwefelfarbstoff kombiniert werden können, sind Säurefarbstoffe und Direkttarbstoffe, z. B. sulfogruppenhaltige Azofarbstoffe, Metallkomplexfarbstoffe, Nitro- und Nitrosofarbstoffe, Carbonylfarbstoffe, Polymethinfarbstoff, Phthalocyaninfarbstoffe und Reaktivfarbstoffe. Diese Farbstoffe weisen einen anionischen Ladungscharakter auf.The pigment dispersion and the sulfur dye are applied either together in a liquor or separately in two successive steps, the order of the application being not critical. The sulfur dye can also consist of a mixture of different sulfur dyes, if appropriate a dye mixture of one or more sulfur dyes and one or more other water-soluble or water-dispersible dyes is used, the dye mixture optionally additionally containing the pigment dispersion. Other water-soluble dyes that can be combined with the water-soluble sulfur dye are acid dyes and direct dyes, e.g. B. sulfo group-containing azo dyes, metal complex dyes, nitro and nitroso dyes, carbonyl dyes, polymethine dye, phthalocyanine dyes and reactive dyes. These dyes have an anionic charge character.
Das auf übliche Weise hergestellte und vorbehandelte Leder wird mit dem Schwefelfarbstoff, gegebenenfalls in Gegenwart der Pigmentdispersion und/oder anderen in der Lederfärberei üblichen wasserlöslichen Farbstoffen, nach dem Ausziehverfahren gefärbt. Die Färbeflotte ist eine wäßrige Lösung, die - bezogen auf das Falzgewicht des Leders - 20 bis 400, insbesondere 50 bis 200 % Wasser, 0,5 bis 8, insbesondere 1,5 bis 6 % Schwefelfarbstoff und gegebenenfalls 0,1 bis 6, insbesondere 0,1 bis 3 % der Pigmentdispersion und/oder 0,1 bis 6, insbesondere 0,1 bis 4 % weiteren wasserlöslichen Farbstoff enthält. Die Temperatur dieser wäßrigen Lösung beträgt 20 bis 100, insbesondere 30 bis 60°C. Die gesamte Färbedauer hängt von der Art des zu färbenden Leders ab und beträgt 20 bis 300, insbesondere 30 bis 120 Minuten.The leather prepared and pretreated in the usual way is dyed with the sulfur dye, optionally in the presence of the pigment dispersion and / or other water-soluble dyes customary in leather dyeing, by the exhaust process. The dyeing liquor is an aqueous solution which - based on the shaved weight of the leather - 20 to 400, in particular 50 to 200% water, 0.5 to 8, in particular 1.5 to 6%, sulfur dye and optionally 0.1 to 6, in particular Contains 0.1 to 3% of the pigment dispersion and / or 0.1 to 6, in particular 0.1 to 4%, further water-soluble dye. The temperature of this aqueous solution is 20 to 100, in particular 30 to 60 ° C. The entire staining time depends depends on the type of leather to be dyed and is 20 to 300, in particular 30 to 120 minutes.
Der Flotte werden vor, während und/oder nach der Färbung übliche Additive zugesetzt. Hierbei handelt es sich z. B. um Hilfsmittel, welche das Eindringen der Farbstoffe und Pigmente fördern, die zu einem gleichmäßigen Auftrag führen, sogenannte Egalisierhilfsmittel, und die Fixierung der Farbstoffe und Pigmente auf der Lederoberfläche verstärken. Andere übliche Zusätze sind Netzmittel, Farbvertiefungsmittel und Fettungsmittel.Customary additives are added to the liquor before, during and / or after dyeing. This is e.g. B. aids that promote the penetration of dyes and pigments that lead to a uniform application, so-called leveling agents, and reinforce the fixation of the dyes and pigments on the leather surface. Other common additives are wetting agents, color deepening agents and greasing agents.
Der gesamte Färbevorgang wird durch Absenken des pH-Wertes der Färbeflotte, vorzugsweise mit Ameisensäure, beendet. Die Ameisensäure läßt man auf übliche Weise 10 bis 60 Minuten einwirken. Die Fertigstellung des Leders erfolgt in an sich bekannter Weise.The entire dyeing process is ended by lowering the pH of the dyeing liquor, preferably with formic acid. The formic acid is allowed to act in the usual way for 10 to 60 minutes. The leather is finished in a manner known per se.
Entweder erfolgt nach dem Färbevorgang die Pigmentierung des Leders mit der erfindungsgemäßen Pigmentdispersion, wobei diese Nachbehandlung eine gleichzeitige erneute Färbung mit wasserlöslichem Schwefelfarbstoff umfassen kann. Bei bereits erfolgter Pigmentierung folgen dagegen als abschließende Schritte die Nachgerbung und danach die sog. Topfärbung des Leders und Fixierung mit übichen Hilfsmitteln. Zur Topfärbung können die gleichen oder andere Farben und/oder Pigmente verwendet werden.Either the leather is pigmented with the pigment dispersion according to the invention after the dyeing process, and this aftertreatment can include simultaneous dyeing with water-soluble sulfur dye. On the other hand, if the pigmentation has already taken place, the final steps are retanning and then the so-called pot dyeing of the leather and fixing with conventional aids. The same or different colors and / or pigments can be used for pot coloring.
Das erfindungsgemäße Färbeverfahren ist für alle Ledersorten, z. B. mineralisch gegerbte oder vegetabil gegerbte Narben-, Rauh-, Velour- oder Nubukleder von Rind, Ziege, Schaf oder Schwein geeignet.The dyeing process according to the invention is for all types of leather, for. B. mineral tanned or vegetable tanned grain, suede, suede or nubuck leather of beef, goat, sheep or pork.
Die Erfindung wird durch die nachfolgenden Beispiele näher erläutert.
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4102670 | 1991-01-30 | ||
| DE4102670 | 1991-01-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0497238A1 true EP0497238A1 (en) | 1992-08-05 |
| EP0497238B1 EP0497238B1 (en) | 1995-08-23 |
Family
ID=6423974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92101257A Expired - Lifetime EP0497238B1 (en) | 1991-01-30 | 1992-01-27 | Process for dyeing of leather |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US5240463A (en) |
| EP (1) | EP0497238B1 (en) |
| JP (1) | JPH04316685A (en) |
| KR (1) | KR920014987A (en) |
| AR (1) | AR245797A1 (en) |
| BR (1) | BR9200272A (en) |
| DE (1) | DE59203324D1 (en) |
| ES (1) | ES2077886T3 (en) |
| TW (1) | TW223668B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5240466A (en) * | 1991-02-23 | 1993-08-31 | Casella Aktiengesellschaft | Dyeing leather with water-insoluble sulphur dyes |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2804138B1 (en) * | 2000-01-20 | 2002-03-29 | Jerome Maini | PROCESS FOR TREATING LEATHER AND LEATHER THUS OBTAINED |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2170229A (en) * | 1985-01-30 | 1986-07-30 | Sandoz Ltd | Dyeing leather |
| EP0377409A2 (en) * | 1989-01-02 | 1990-07-11 | Ciba-Geigy Ag | Process for dyeing leather |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2913176A1 (en) * | 1979-04-02 | 1980-10-23 | Hoechst Ag | DISPERSING AGENTS, METHOD FOR THE PRODUCTION AND USE THEREOF |
| ES495179A0 (en) * | 1979-09-25 | 1981-06-01 | Hoechst Ag | PROCEDURE FOR THE PREPARATION OF POLYETERPOLIAMINES |
| DE3120697A1 (en) * | 1981-05-23 | 1982-12-09 | Hoechst Ag, 6000 Frankfurt | ANIONIC COMPOUNDS BASED ON MODIFIED NOVOLACK OXALKYLATES, THEIR PRODUCTION AND THEIR USE AS A FOAM-FREE INTERFACE ACTIVE AGENT |
| DE4105772A1 (en) * | 1991-02-23 | 1992-08-27 | Cassella Ag | METHOD FOR DYING LEATHER WITH WATER-INSOLUBLE SULFUR DYES |
-
1992
- 1992-01-16 TW TW081100284A patent/TW223668B/zh active
- 1992-01-27 EP EP92101257A patent/EP0497238B1/en not_active Expired - Lifetime
- 1992-01-27 DE DE59203324T patent/DE59203324D1/en not_active Expired - Fee Related
- 1992-01-27 ES ES92101257T patent/ES2077886T3/en not_active Expired - Lifetime
- 1992-01-28 JP JP4013330A patent/JPH04316685A/en not_active Withdrawn
- 1992-01-28 KR KR1019920001167A patent/KR920014987A/en not_active Application Discontinuation
- 1992-01-28 AR AR92321697A patent/AR245797A1/en active
- 1992-01-29 US US07/827,442 patent/US5240463A/en not_active Expired - Fee Related
- 1992-01-29 BR BR929200272A patent/BR9200272A/en not_active Application Discontinuation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2170229A (en) * | 1985-01-30 | 1986-07-30 | Sandoz Ltd | Dyeing leather |
| EP0377409A2 (en) * | 1989-01-02 | 1990-07-11 | Ciba-Geigy Ag | Process for dyeing leather |
Non-Patent Citations (1)
| Title |
|---|
| MELLIAND TEXTILBERICHTE. Nr. 12, 1973, HEIDELBERG DE Seiten 1314 - 1327; HEID ET AL.: '100 Jahre Schwefelfarbstoffe.' * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5240466A (en) * | 1991-02-23 | 1993-08-31 | Casella Aktiengesellschaft | Dyeing leather with water-insoluble sulphur dyes |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2077886T3 (en) | 1995-12-01 |
| JPH04316685A (en) | 1992-11-09 |
| US5240463A (en) | 1993-08-31 |
| BR9200272A (en) | 1992-10-06 |
| KR920014987A (en) | 1992-08-26 |
| AR245797A1 (en) | 1994-02-28 |
| TW223668B (en) | 1994-05-11 |
| DE59203324D1 (en) | 1995-09-28 |
| EP0497238B1 (en) | 1995-08-23 |
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