EP0183078A1 - Process for improving the light fastness of dyed leathers - Google Patents
Process for improving the light fastness of dyed leathers Download PDFInfo
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- EP0183078A1 EP0183078A1 EP85113858A EP85113858A EP0183078A1 EP 0183078 A1 EP0183078 A1 EP 0183078A1 EP 85113858 A EP85113858 A EP 85113858A EP 85113858 A EP85113858 A EP 85113858A EP 0183078 A1 EP0183078 A1 EP 0183078A1
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- leather
- dyes
- light fastness
- dyeing
- dyed
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- 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
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- 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
- D06P1/673—Inorganic compounds
- D06P1/67333—Salts or hydroxides
- D06P1/67341—Salts or hydroxides of elements different from the alkaline or alkaline-earth metals or with anions containing those elements
-
- 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
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/02—After-treatment
- D06P5/10—After-treatment with compounds containing metal
Definitions
- the present invention relates to a method for dyeing leather while improving the light fastness of the dyed leather.
- leather is mainly dyed with acidic, substantive or metal complex dyes in an aqueous medium. Occasionally, basic dyes or selected sulfur dyes are used for special types of leather. With so-called aniline leathers, i.e. If the leather is weak or not finished at all, the lightfastness of the dyeing is a decisive criterion for the quality of the finished leather. This is especially true for furniture and clothing leather, which as a finished finished product is almost always exposed to the effects of light. This affects grain leather and suede equally.
- the particularly lightfast metal complex dyes are still predominantly used for coloring high-quality aniline leather.
- the production of these dyes is described in numerous patents, both 1: 1 and 1: 2 metal complex dyes being suitable for leather dyeing. Salts of Cr, Fe, Co, Ni and Cu are particularly suitable for the metallization. With such dyes, whose lightfastness values are on average 4 to 5, the lightfastness of the dye-leather system can also be significantly improved.
- the invention was therefore based on the object of developing a process with which, using the usually inexpensive anionic azo dyes used for leather dyeing, by modifying the conventional ones Dyeing process a significant improvement in the lightfastness of the leather dyeings can be obtained.
- This object is achieved in that the leather to be dyed is treated with copper salts before, during or after the dyeing process. It must be regarded as surprising that during the dyeing process copper complexes of the anionic leather dyes with increased lightfastness appear under the very mild conditions for dyeing leather compared to textile dyeing, and above all also with a view to the fact that the leather itself can accumulate copper salts can form.
- the aftertreatment of dyeings on textile material for example wool or cellulose fibers
- water-soluble copper salts is also known (see IG guide for dyeing protein fibers, 1932 and Ullmann, 3rd edition, 7th volume, pp. 17 ff.).
- special copper-based dyes such as coprantine, cuprophenyl, benzocuprol or Cuprofix dyes must be used.
- the coppering takes place under conditions which are out of the question for leather dyeing, for example one to several hours of treatment of the material to be dyed at 70 to 100 * C.
- this is a pure aftertreatment of the dyeings, while in the process according to the invention the coppering can be done before, during and after coloring.
- the sulfate, chloride, nitrate, acetate, formate or the corresponding copper tetramine salts can be used as copper salts in the process according to the invention.
- the addition can take place at pH values of 2-9, preferably at pH 4.5-6, the amounts of the copper salts being between 0.01 and 3 percent, preferably 0.1-0.5 percent, based on the weight of the leather to be dyed.
- the copper salt is preferably added before or during the addition of dye, but it can also be added after the actual dyeing process. It is also possible to add copper salt and dye to the dyeing liquor and to add the leather to be dyed only when the copper-dye complex has already formed.
- the temperature of the dyebath can be 20-70'C, preferably 40-50 . C.
- additions of ammonia or the anionic and nonionic dyeing auxiliaries and surfactants customary in leather dyeing can be expedient.
- Suitable dyes for the process are especially azo dyes with 0.0'-dioxy-azo, 0-oxy-O I- carboxy-azo. or 0-oxy-azo groupings, where both 1,1- and 1,2-copper complexes can arise. It should be noted that the complex formation does not proceed equally easily with all dyes with the groups described above. Since the hue does not change practically with the coppering in most of the dye types mentioned, the main criterion for complex formation remains the testing of the lightfastness of the coloring.
- oxidizing agents such as hydrogen peroxide, alkali peroxides, urea peroxide, perborates, percarbonates, persulfates, peracids, alkali chlorites, perchlorates, acyl peroxides or chromic acid in amounts of 30-300 percent, preferably 100-200 percent of the amount of copper salt used, complex formation can be achieved.
- complex formation can be achieved.
- the method described according to the invention can be applied to all common types of leather, such as pure chrome leather, post-chrome-plated vegetable leather, vegetable-synthetically translated chrome leather or even leather with special tanning based on aluminum salts, aldehydes and / or synthetic white tanning agents.
- Two pieces of an intermediate dried chrome split leather are dyed as follows. The percentages relate to the dry weight of the leather.
- the light fastness according to IUF 402 is 4-5 for coloring A and 3 for coloring B.
- Two pieces of an intermediate dried chrome split leather are dyed as follows. The percentages relate to the dry weight of the leather.
- Two pieces of a chrome tanned, folded 1.2 mm thick cowhide leather are worked as follows. The percentages relate to the fold weight of the leather.
- the lightfastness of color A is 4, that of color B 2-3.
- the table below shows some examples of dyes which, when coppering during the dyeing process, result in a significant improvement in the lightfastness values.
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- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Coloring (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein Verfahren zur Färbung von Leder unter gleichzeitiger Verbesserung der Lichtechtheit der gefärbten Leder.The present invention relates to a method for dyeing leather while improving the light fastness of the dyed leather.
Leder werden überwiegend mit sauren, substantiven oder Metallkomplex-Farbstoffen in wäßrigem Medium gefärbt. Vereinzelt finden für spezielle Lederarten auch basische Farbstoffe oder ausgewählte Schwefelfarbstoffe Verwendung. Bei sog. Anilinledern, d.h. nur schwach oder garnicht ge-finishten Ledern, ist die Lichtechtheit der Färbung ein entscheidendes Kriterium für die Qualität des fertigen Leders. Das trifft vor allem für Möbel- und Bekleidungsleder zu, die als fertig verarbeitetes Endprodukt fast ständig der Einwirkung von Licht ausgesetzt sind. Hiervon sind Narbenleder und Velourleder gleichermaßen betroffen.Leather is mainly dyed with acidic, substantive or metal complex dyes in an aqueous medium. Occasionally, basic dyes or selected sulfur dyes are used for special types of leather. With so-called aniline leathers, i.e. If the leather is weak or not finished at all, the lightfastness of the dyeing is a decisive criterion for the quality of the finished leather. This is especially true for furniture and clothing leather, which as a finished finished product is almost always exposed to the effects of light. This affects grain leather and suede equally.
Mit den in der Praxis am meisten benutzten sauren Lederfarbstoffen, in der Mehrzahl anionische Azofarbstoffe, können im Normalfall kaum Lichtechtheitswerte über 3 erzielt werden. Dieser Wert liegt an der unteren Grenze der für die genannten Lederarten akzeptablen Lichtechtheit. Entscheidend ist hierbei aber nicht nur der für den Farbstoff charakteristische Lichtechtheitswert, sondern der Wert des Systems Farbstoff-Leder. Es ist deshalb nach Verfahren gesucht worden, die Lichtechtheit dieses Systems durch Variationen der Prozesse Nachgerbung, Färbung und Fettung zu verbessern.With the most commonly used acidic leather dyes, mostly anionic azo dyes, light fastness values above 3 cannot normally be achieved. This value lies at the lower limit of the light fastness acceptable for the types of leather mentioned. The decisive factor here is not only the light fastness value characteristic of the dye, but also the value of the dye-leather system. Methods have therefore been sought to improve the light fastness of this system by varying the processes of retanning, coloring and oiling.
Durch die Verwendung sehr lichtechter, synthetischer Gerbstoffe und lichtechter, spezieller Fettungsmittel (siehe DOS 29 39 129) konnten zwar Verbesserungen erzielt werden, die aber zum einen die Lichtechtheitswerte meist nur um 0,5 bis maximal 1 Stufe verbessern können, zum anderen aber auch das Leder in seinen übrigen Eigenschaften, wie Griff, Weichheit, Narbenfestigkeit, Fülle usw. deutlich beeinflussen.Through the use of very lightfast, synthetic tannins and lightfast, special fatliquor (see DOS 29 39 129) improvements could be achieved, but mostly the lightfastness values only 0.5 to a maximum of 1 level can improve, but also significantly affect the leather in its other properties, such as feel, softness, grain strength, fullness, etc.
In der Praxis werden deshalb für die Färbung hochwertiger Anilinleder nach wie vor überwiegend die besonders lichtechten Metallkomplex-Farbstoffe verwendet. Die Herstellung dieser Farbstoffe ist in zahlreichen Patenten beschrieben, wobei für die Lederfärbung sowohl die 1:1 als auch 1:2 Metallkomplex-Farbstoffe geeignet sind. Für die Metallisierung kommen vor allem Salze des Cr, Fe, Co, Ni und Cu in Betracht. Mit solchen Farbstoffen, deren Lichtechtheitswerte durchschnittlich bei 4 bis 5 liegen, kann auch die Lichtechtheit des Systems Farbstoff-Leder wesentlich verbessert werden.In practice, therefore, the particularly lightfast metal complex dyes are still predominantly used for coloring high-quality aniline leather. The production of these dyes is described in numerous patents, both 1: 1 and 1: 2 metal complex dyes being suitable for leather dyeing. Salts of Cr, Fe, Co, Ni and Cu are particularly suitable for the metallization. With such dyes, whose lightfastness values are on average 4 to 5, the lightfastness of the dye-leather system can also be significantly improved.
Diese Farbstoffe erfüllen in den meisten Fällen die gestellten Anforderungen, wobei naturgemäß, je nach dem für die Komplexierung verwendeten Metall auch die übrigen Echtheitseigenschaften des Leders, wie Schweißechtheit, Waschechtheit, Wasserechtheit und Migrationsechtheit unterschiedlich beeinfluß werden. Ebenso hängt das färberische Verhalten, wie Egalisiervermögen und Penetration des Farbstoffes, von der Art des Komplexes ab. Nachteilig wirkt sich die Verwendung der handelsüblichen Metallkomplex-Farbstoffe in vielen Fällen auf die Kalkulation des Fertigleders aus, weil durch die zusätzliche Komplexierung bei der Herstellung dieser Farbstoffe Kosten entstehen, die sich in zum Teil beträchtlichen Preisen für die Metallkomplex-Farbstoffe niederschlagen.These dyes meet the requirements in most cases, whereby, depending on the metal used for the complexation, the other fastness properties of the leather, such as perspiration fastness, wash fastness, water fastness and migration fastness, are influenced differently. The dyeing behavior, such as leveling ability and penetration of the dye, also depends on the type of complex. In many cases, the use of the commercially available metal complex dyes has a disadvantageous effect on the calculation of the finished leather, because the additional complexation in the production of these dyes results in costs which are sometimes reflected in considerable prices for the metal complex dyes.
Der Erfindung lag deshalb die Aufgabe zugrunde, ein Verfahren zu entwickeln, mit dem, unter Verwendung der für die Lederfärbung üblichen, meist preisgünstigen anionischen Azofarbstoffe, durch Abwandlung der praxisüblichen Färbeverfahren eine deutliche Verbesserung der Lichtechtheit der Lederfärbungen erhalten werden kann. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die zu färbenden Leder vor, während oder nach dem Färbeprozeß mit Kupfersalzen behandelt werden. Es muß als überraschend angesehen werden, daß sich unter den für das Färben von Leder im Vergleich zur Textilfärbung sehr milden Bedingungen, und vor allem auch im Hinblick darauf, daß das Leder selbst Kupfersalze anlagern kann, während des Färbeprozesses Kupferkomplexe der anionischen Lederfarbstoffe mit erhöhter Lichtechtheit bilden können.The invention was therefore based on the object of developing a process with which, using the usually inexpensive anionic azo dyes used for leather dyeing, by modifying the conventional ones Dyeing process a significant improvement in the lightfastness of the leather dyeings can be obtained. This object is achieved in that the leather to be dyed is treated with copper salts before, during or after the dyeing process. It must be regarded as surprising that during the dyeing process copper complexes of the anionic leather dyes with increased lightfastness appear under the very mild conditions for dyeing leather compared to textile dyeing, and above all also with a view to the fact that the leather itself can accumulate copper salts can form.
Die Herstellung von Kupferkomplex-Farbstoffen ist bekannt und z.B. in DP 807 289 und in EP 0 022 485 beschrieben. Ebenso ist die Färbung von Leder mit Kupferkomplex-Farbstoffen bekannt. Diese Farbstoffe liegen aber als fertige Metallkomplex-Farbstoffe vor und werden nicht erst unter den Bedingungen der Lederfärbung erzeugt.The production of copper complex dyes is known and e.g. in DP 807 289 and in EP 0 022 485. The coloring of leather with copper complex dyes is also known. However, these dyes are available as finished metal complex dyes and are not first produced under the conditions of the leather dyeing.
Bekannt ist auch die Nachbehandlung von Färbungen auf textilem Material, z.B. Wolle oder Cellulosefasern, mit wasserlöslichen Kupfersalzen (siehe IG-Ratgeber für da Färben von Proteinfasern, 1932 bzw. Ullmann, 3. Auflage, 7. Band S. 17 ff.). Hierbei müssen aber spezielle kupferbare Farbstoffe, wie Coprantin-, Cuprophenyl-, Benzocuprol- oder Cuprofix-Farbstoffe, verwendet werden. Außerdem findet die Kupferung unter Bedingungen statt, die für die Lederfärbung nicht in Betracht kommen, z.B. einbis mehrstündiges Behandeln des Färbegutes bei 70 bis 100*C. Darüber hinaus handelt es sich hier um eine reine Nachbehandlung der Färbungen, während bei dem erfindungsgemäßen Verfahren die Kupferung vor, während und nach der Färbung erfolgen kann. Es ergibt sich somit, daß das vorliegende Verfahren sich in mehreren wesentlichen Details von der Nachbehandlung textiler Färbungen unterscheidet. Als Kupfersalze können bei dem erfindungsgemäßen Verfahren das Sulfat, Chlorid, Nitrat, Acetat, Formiat oder die entsprechenden Kupfertetramin-Salze verwendet werden. Die Zugabe kann bei pH-Werten von 2-9, vorzugsweise bei pH 4,5-6 erfolgen, wobei die Mengen der Kupfersalze zwischen 0,01 und 3 Prozent, vorzugsweise 0,1 - 0,5 Prozent, bezogen auf das Gewicht des zu färbenden Leders, variieren können. Die Zugabe des Kupfersalzes erfolgt vorzugsweise vor oder während der Farbstoffzugabe, es kann aber auch nach dem eigentlichen Färbeprozeß zugegeben werden. Außerdem ist es möglich, Kupfersalz und Farbstoff in die Färbeflotte zu geben und das zu färbende Leder erst zuzugeben, wenn sich der Kupfer-Farbstoffkomplex bereits gebildet hat. Diese Arbeitsweise hat sich bei einzelnen Farbstoffen besonders bewährt. Die Temperatur des Färbebades kann 20 - 70'C betragen, vorzugsweise 40 - 50.C. Um die Einfärbung der entstehenden Komplexfarbstoffe zu verbessern, können Zusätze von Ammoniak oder den in der Lederfärbung üblichen anionischen und nichtionischen Färbereihilfsmitteln und Tensiden zweckmäßig sein.The aftertreatment of dyeings on textile material, for example wool or cellulose fibers, with water-soluble copper salts is also known (see IG guide for dyeing protein fibers, 1932 and Ullmann, 3rd edition, 7th volume, pp. 17 ff.). However, special copper-based dyes such as coprantine, cuprophenyl, benzocuprol or Cuprofix dyes must be used. In addition, the coppering takes place under conditions which are out of the question for leather dyeing, for example one to several hours of treatment of the material to be dyed at 70 to 100 * C. In addition, this is a pure aftertreatment of the dyeings, while in the process according to the invention the coppering can be done before, during and after coloring. It follows that the present method differs in several essential details from the aftertreatment of textile dyeings. The sulfate, chloride, nitrate, acetate, formate or the corresponding copper tetramine salts can be used as copper salts in the process according to the invention. The addition can take place at pH values of 2-9, preferably at pH 4.5-6, the amounts of the copper salts being between 0.01 and 3 percent, preferably 0.1-0.5 percent, based on the weight of the leather to be dyed. The copper salt is preferably added before or during the addition of dye, but it can also be added after the actual dyeing process. It is also possible to add copper salt and dye to the dyeing liquor and to add the leather to be dyed only when the copper-dye complex has already formed. This method of working has proven particularly effective for individual dyes. The temperature of the dyebath can be 20-70'C, preferably 40-50 . C. In order to improve the coloring of the complex dyes formed, additions of ammonia or the anionic and nonionic dyeing auxiliaries and surfactants customary in leather dyeing can be expedient.
Die Anwendung solcher Produkte wird in den Patentschriften CH 325 058, DE 667 744, DE 1 287 554 oder DAS 28 56 628 beschrieben.The use of such products is described in the patent specifications CH 325 058, DE 667 744, DE 1 287 554 or DAS 28 56 628.
Als Farbstoffe eignen sich für das Verfahren vor allem Azofarbstoffe mit 0,0'-Dioxy-Azo-, 0-Oxy-OI-Carboxy-Azo-. oder 0-Oxy-Azo-Gruppierungen, wobei sowohl 1,1- als auch 1,2-Kupferkomplexe entstehen können. Dabei ist festzuhalten, daß die Komplexbildung nicht bei allen Farbstoffen mit den oben beschriebenen Gruppierungen gleichermaßen leicht abläuft. Da sich der Farbton durch die Kupferung bei den meisten der genannten Farbstofftypen praktisch nicht ändert, bleibt als Hauptkriterium der Komplexbildung die Prüfung der Lichtechtheit der Färbung.Suitable dyes for the process are especially azo dyes with 0.0'-dioxy-azo, 0-oxy-O I- carboxy-azo. or 0-oxy-azo groupings, where both 1,1- and 1,2-copper complexes can arise. It should be noted that the complex formation does not proceed equally easily with all dyes with the groups described above. Since the hue does not change practically with the coppering in most of the dye types mentioned, the main criterion for complex formation remains the testing of the lightfastness of the coloring.
Die Kupferung kann aber auch bei zahlreichen Azofarbstoffen erfolgreich durchgeführt werden, die keine der genannten Strukturmerkmale aufweisen. In diesen Fällen kann durch Zusatz von Oxidationsmitteln, wie Wasserstoffperoxid, Alkaliperoxide, Harnstoffperoxid, Perboraten, Percarbonaten, Persulfate, Persäuren, Alkalichlorite, Perchlorate, Acylperoxiden oder Chromsäure in Mengen von 30 - 300 Prozent, vorzugsweise 100 - 200 Prozent der eingesetzten Menge an Kupfersalz, eine Komplexbildung erzielt werden. Allerdings tritt in diesen Fällen meist eine Parbtonverschiebung ein, deren Ausmaß und Nuance aber durch einen entsprechenden Versuch leicht ermittelt werden kann.However, coppering can also be carried out successfully with numerous azo dyes which do not have any of the structural features mentioned. In these cases, by adding oxidizing agents such as hydrogen peroxide, alkali peroxides, urea peroxide, perborates, percarbonates, persulfates, peracids, alkali chlorites, perchlorates, acyl peroxides or chromic acid in amounts of 30-300 percent, preferably 100-200 percent of the amount of copper salt used, complex formation can be achieved. However, in these cases there is usually a shift in the hue, but the extent and nuance of this can easily be determined by means of a corresponding experiment.
Das erfindungsgemäß beschriebene Verfahren kann auf allen gängigen Lederarten, wie reinem Chromleder, nachchromiertem Vegetabilleder, vegetabil-synthetisch übersetztem Chromleder oder auch Ledern mit spezieller Gerbung auf Basis von Aluminiumsalzen, Aldehyden und/oder synthetischen Weißgerbstoffen angewandt werden.The method described according to the invention can be applied to all common types of leather, such as pure chrome leather, post-chrome-plated vegetable leather, vegetable-synthetically translated chrome leather or even leather with special tanning based on aluminum salts, aldehydes and / or synthetic white tanning agents.
Zwei Stücke eines zwischengetrockneten Chromspaltleders werden wie folgt gefärbt. Die Prozentangaben beziehen sich auf das Trockengewicht des Leders.Two pieces of an intermediate dried chrome split leather are dyed as follows. The percentages relate to the dry weight of the leather.
A. 600,0 % Wasser 50°C 1,0 % Acid Brown 338 1,0 % Derminol HL konz. Plv. (anionisches Färbereihilfsmittel) 0,4 % Kupfersulfat 0,3 % Ammoniak techn. 60 Minuten laufen lassen, dann zusetzen 3,0 % Derminol-Licker M ) synthetische 3,0 % Derminol-Licker ASN ) Lederfettungsmittel 30 Minuten laufen lassen, ausrecken, trocknen, schleifen, entstaubenA. 600.0% water 50 ° C 1.0% Acid Brown 338 1.0% Derminol HL conc. Plv. (Anionic dyeing aid) 0.4% copper sulfate 0.3% ammonia techn. Let it run for 60 minutes, then add 3.0% Derminol-Licker M) synthetic 3.0% Derminol-Licker ASN) Let the leather greasing agent run for 30 minutes, stretch, dry, sand, dust off
B. Färbeprozeß wie bei A beschrieben, aber ohne Kupfersulfat.B. dyeing process as described in A, but without copper sulfate.
Die Lichtechtheit gemäß IUF 402 beträgt für Färbung A 4-5, für Färbung B 3.The light fastness according to IUF 402 is 4-5 for coloring A and 3 for coloring B.
Zwei Stücke eines zwischengetrockneten Chromspaltleders werden wie folgt gefärbt. Die Prozentangaben beziehen sich auf das Trockengewicht des Leders.Two pieces of an intermediate dried chrome split leather are dyed as follows. The percentages relate to the dry weight of the leather.
A. 600,0 % Wasser 50°C 1,0 % Acid Brown 102 1,0 % Tributylphenol mit 13 Mol Ethylenoxid 0,4 % Kupfersulfat 0,3 % Ammoniak techn. 1,0 % Wasserstoffperoxid 30%ig 60 Minuten laufen lassen, dann zusetzen 3,0 % Derminol-Licker ASN (synthetisches Lederfettungsmittel) 3,0 % Derminol-Licker EMB (synth. Lederfettungsmittel) 30 Minuten laufen lassen, dann zusetzen 0,5 % Ameisensäure 85%ig 30 Minuten laufen lassen, ausrecken, trocknen, schleifen, entstaubenA. 600.0% water 50 ° C 1.0% Acid Brown 102 1.0% tributylphenol with 13 mol ethylene oxide 0.4% copper sulfate 0.3% ammonia techn. Let 1.0% hydrogen peroxide run 30% for 60 minutes, then add 3.0% Derminol-Licker ASN (synthetic leather greaser) Let 3.0% Derminol-Licker EMB (synthetic leather fatliquor) run for 30 minutes, then add 0.5% formic acid 85% for 30 minutes, stretch, dry, grind, dedust
B. Färbeprozeß wie bei A beschrieben, aber ohne Kupfersulfat und Peroxid. Bei der Färbeweise gemäß A wird die Nuance im Vergleich zu B trüber und dunkler. Der Lichtechtheitswert der Färbung A beträgt 4-5, der Färbung B nur 1-2.B. dyeing process as described in A, but without copper sulfate and peroxide. The shade according to A makes the shade more cloudy and darker than B. The lightfastness value of color A is 4-5, color B only 1-2.
Zwei Stücke eines auf übliche Weise chromgegerbten, gefalzten Rindleders von der Stärke 1,2 mm werden wie folgt gearbeitet. Die Prozentangaben beziehen sich auf das Falzgewicht des Leders.Two pieces of a chrome tanned, folded 1.2 mm thick cowhide leather are worked as follows. The percentages relate to the fold weight of the leather.
A. 100,0 % Wasser 30°C 1,0 % Natriumbicarbonat 0,8 % Calciumformiat 60 Minuten laufen lassen, 10 Minuten waschen 150,0 % Wasser 40°C 0,5 % Acid Brown 101 0,1 % Kupfersulfat 0,2 % Ammoniak techn. 0,2 % Nonylphenol mit 8 Mol Ethylenoxid 15 Minuten laufen lassen, dann Leder zugeben. Weitere 45 Minuten laufen lassen, dann zusetzen 3,0 % Derminol-Licker EMB ) synthetische 3,0 % Derminol-Licker M ) Lederfettungsmittel 30 Minuten laufen lassen, dann zusetzen 0,2 % Ameisensäure 85 %ig ausrecken, vakuumtrocknen B. Färbeweise wie unter A beschrieben, aber ohne Kupfersulfat.A. 100.0% water 30 ° C 1.0% sodium bicarbonate 0.8% calcium formate run for 60 minutes, wash for 10 minutes 150.0% water 40 ° C 0.5% Acid Brown 101 0.1% copper sulfate 0, 2% ammonia techn. Let 0.2% nonylphenol run with 8 moles of ethylene oxide for 15 minutes, then add leather. Let it run for another 45 minutes, then add 3.0% Derminol-Licker EMB) synthetic 3.0% Derminol-Licker M) let the leather greasing agent run for 30 minutes, then add 0.2% formic acid, stretch 85%, vacuum dry B. staining as described under A, but without copper sulfate.
Die Lichtechtheit der Färbung A beträgt 4, die der Färbung B 2-3.The lightfastness of color A is 4, that of color B 2-3.
In der nachfolgenden Tabelle sind noch einige Beispiele für Farbstoffe angegeben, die bei der Kupferung während des Färbeprozesses eine deutliche Verbesserung der Lichtechtheitswerte ergeben.
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19843440989 DE3440989A1 (en) | 1984-11-09 | 1984-11-09 | METHOD FOR IMPROVING THE LIGHT-FASTNESS OF LEATHER COLORS |
| DE3440989 | 1984-11-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0183078A1 true EP0183078A1 (en) | 1986-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP85113858A Withdrawn EP0183078A1 (en) | 1984-11-09 | 1985-10-31 | Process for improving the light fastness of dyed leathers |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0183078A1 (en) |
| JP (1) | JPS61113885A (en) |
| KR (1) | KR860004203A (en) |
| BR (1) | BR8505628A (en) |
| DE (1) | DE3440989A1 (en) |
| ES (1) | ES8702545A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0181836B1 (en) * | 1984-11-09 | 1988-12-21 | Ciba-Geigy Ag | Process for improving the light fastness of dyed leathers |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE417209C (en) * | 1924-05-28 | 1925-08-08 | Kalle & Co Akt Ges | Process for dyeing leather |
| US2090396A (en) * | 1936-12-15 | 1937-08-17 | Edward S Chapin | Fixing composition and method of aftertreating dyed materials |
| US2908543A (en) * | 1956-06-29 | 1959-10-13 | Gen Aniline & Film Corp | Aftertreatment of leather dyeings |
| DE1079248B (en) * | 1954-06-19 | 1960-04-07 | Cassella Farbwerke Mainkur Ag | Process for the preparation of substantive tris and polyazo dyes |
-
1984
- 1984-11-09 DE DE19843440989 patent/DE3440989A1/en not_active Withdrawn
-
1985
- 1985-10-31 EP EP85113858A patent/EP0183078A1/en not_active Withdrawn
- 1985-11-07 ES ES548616A patent/ES8702545A1/en not_active Expired
- 1985-11-08 KR KR1019850008347A patent/KR860004203A/en not_active Application Discontinuation
- 1985-11-08 BR BR8505628A patent/BR8505628A/en unknown
- 1985-11-08 JP JP60249111A patent/JPS61113885A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE417209C (en) * | 1924-05-28 | 1925-08-08 | Kalle & Co Akt Ges | Process for dyeing leather |
| US2090396A (en) * | 1936-12-15 | 1937-08-17 | Edward S Chapin | Fixing composition and method of aftertreating dyed materials |
| DE1079248B (en) * | 1954-06-19 | 1960-04-07 | Cassella Farbwerke Mainkur Ag | Process for the preparation of substantive tris and polyazo dyes |
| US2908543A (en) * | 1956-06-29 | 1959-10-13 | Gen Aniline & Film Corp | Aftertreatment of leather dyeings |
Non-Patent Citations (2)
| Title |
|---|
| DAS LEDER, Band 29, Nr. 7, Juli 1978, Seiten 105-111, Darmstadt, DE; B. MARTINELLI et al.: "Die Lichtechtheit von Leder" * |
| SOVIET INVENTIONS ILLUSTRATED, Woche B 20, 20. Juni 1979, Zusammenfassung Nr. 38414b/20, London, GB; & SU - A - 614 142 (FUR IND RES INST) 05-06-1978 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0181836B1 (en) * | 1984-11-09 | 1988-12-21 | Ciba-Geigy Ag | Process for improving the light fastness of dyed leathers |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3440989A1 (en) | 1986-05-15 |
| JPS61113885A (en) | 1986-05-31 |
| BR8505628A (en) | 1986-08-12 |
| ES8702545A1 (en) | 1987-01-01 |
| ES548616A0 (en) | 1987-01-01 |
| KR860004203A (en) | 1986-06-18 |
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Inventor name: MUENCH, NORBERT, DR. |