DE687153C - Process for fixing tanning agents in leather - Google Patents

Process for fixing tanning agents in leather

Info

Publication number
DE687153C
DE687153C DE1934C0051434 DEC0051434D DE687153C DE 687153 C DE687153 C DE 687153C DE 1934C0051434 DE1934C0051434 DE 1934C0051434 DE C0051434 D DEC0051434 D DE C0051434D DE 687153 C DE687153 C DE 687153C
Authority
DE
Germany
Prior art keywords
leather
tanning agents
fixing
protein
degradation
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.)
Expired
Application number
DE1934C0051434
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stockhausen GmbH and Co KG
Original Assignee
Chemische Fabrik Stockhausen GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chemische Fabrik Stockhausen GmbH filed Critical Chemische Fabrik Stockhausen GmbH
Priority to DE1934C0051434 priority Critical patent/DE687153C/en
Application granted granted Critical
Publication of DE687153C publication Critical patent/DE687153C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C14—SKINS; HIDES; PELTS; LEATHER
    • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
    • C14C9/00—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes
    • C14C9/04—Fixing tanning agents in the leather

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Description

Verfahren zum Fixieren von Gerbstoffen im Leder Gegenstand des Patents 685 744 ist -ein Verfahren zum Fixieren von Gerbstoffen in in üblicher Weise vorgegerbtem Leder durch Behandlung mit Auflösungen von Eiweißspaltprodukten, dieeinen Abbaugrad vonetwa 300110 aufweisen. Das Verfahren ist dadurch ekennzeichnet, daß das Leder im Einbadverfahren mit einem Gemisch von konzentrierten Lösungen solcher Eiweißabbauprodukte und konzentrierten Gerbstofflösungen mit oder ohne Zusatz von synthetischen Gerbstoffen und Netzmitteln, wie sulfonierten Ölen und Fetten, im sauren pH-Bereich behandelt wird.Method for fixing tanning agents in leather The subject of patent 685 744 is a method for fixing tanning agents in conventionally pre-tanned leather by treatment with dissolutions of protein breakdown products which have a degree of degradation of about 300,110. The process is characterized in that the leather is treated in the single bath process with a mixture of concentrated solutions of such protein degradation products and concentrated tanning solutions with or without the addition of synthetic tanning agents and wetting agents, such as sulfonated oils and fats, in the acidic pH range.

Es wurde nun gefunden, daß in gleicher Weise, d. h. ebenfalls im Einbadverfahren, im sauren Bereich Eiweißspaltprodukte, welche einen Abbaugrad von unter 300/0, jedoch von mindestens 2o% haben, Verwendung -finden können.It has now been found that in the same way, i.e. H. Also in the single bath process, in the acidic range, protein breakdown products, which have a degree of degradation of less than 300/0, but of at least 20%, can be used.

Man hat zwar schon vorgeschlagen, Gerbstoffe im Leder dadurch zu fixieren, daß man abgepreßtes Leder mit Lösungen von Eiweiß.-spaltprodukten, die einen Abhaugrad von etwa 300/0 aufweisen, z. B. im Walkfaß bei gewöhnlicher Temperatur behandelt und die mit diesen Lösungen gesättigten Leder in üblicher Weise fertig zurichtet. Gegenüber diesem Zweibadverfahren weist das Verfahfen der vorliegenden Erfindung den großen Vorteil auf, daß ;es im Einbadverfahren durchführbar ist, und zwar im sauren Bereich, was «bisher noch nicht möglich ge-,vesen ist. B eispiel ioo kg bereits vorgegerbter, abgepreßter Leder werden nachgegerbt, und zwar mit ioo/o einer 2o' B6 starken QuebrachoextraktbTühe. Der Extrakt wird vor dem Eingehen ins Faß nüt dem 4. Teil eines Gewichtes mit den abgebauten Eiweißprodukten (2o%) gemischt und dann dem Leder zugegeben. Nach etwa 2stündigem Walken im sauren Bereich ist das Gerbstoff-Eiweiß-Gemisch vollständig aufgenommen. Die Lieder werden aus dem Faß genommen, leicht durch Wasser gezogen und dann, wie üblich, weiterverarbeitet.It has already been proposed to fix tannins in leather by mixing pressed leather with solutions of protein cleavage products which have a removal rate of about 300/0, e.g. B. treated in a fulling barrel at ordinary temperature and the leather saturated with these solutions finished in the usual way. Compared to this two-bath process, the process of the present invention has the great advantage that it can be carried out in the one-bath process, specifically in the acidic range, which has not yet been possible. For example, 100 kg of already pretanned, pressed leather are retanned with 100% of a 20 'B6 strong quebracho extract. The extract is mixed with the degraded protein products (20%) before entering the barrel and then added to the leather. After about 2 hours of fulling in the acidic area, the tannin-protein mixture is completely absorbed. The songs are taken out of the barrel, gently pulled through water and then, as usual, processed further.

Claims (1)

PATENTANSPRUCH: Weitere Ausbildun- des Verfahrens des Patents 685 744 zum Fixieren von Gerbstoffen in in üblicher Weise vorgegerbtem Leder durch Behandlung mit Auflösungen von Eiweißspaltprodukten im sauren Bereich, dadurch gekennzeichnet, daßman solche Eiweißspaltprodukte anwendet, welchie einen Abbaugrad von unter 300/0, jedoch von mindestens 2oo/o haben. PATENT CLAIM: Further training of the process of the patent 685 744 for fixing tannins in leather pretanned in the usual way by treatment with dissolving protein breakdown products in the acidic range, characterized in that such protein breakdown products are used, which have a degree of degradation of less than 300/0, but of have at least 2oo / o.
DE1934C0051434 1934-12-07 1934-12-07 Process for fixing tanning agents in leather Expired DE687153C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1934C0051434 DE687153C (en) 1934-12-07 1934-12-07 Process for fixing tanning agents in leather

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1934C0051434 DE687153C (en) 1934-12-07 1934-12-07 Process for fixing tanning agents in leather

Publications (1)

Publication Number Publication Date
DE687153C true DE687153C (en) 1940-01-24

Family

ID=7027395

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1934C0051434 Expired DE687153C (en) 1934-12-07 1934-12-07 Process for fixing tanning agents in leather

Country Status (1)

Country Link
DE (1) DE687153C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1040175B (en) * 1955-07-23 1958-10-02 Elektrochemische Fabrik Kempen Manufacture of lower leather

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1040175B (en) * 1955-07-23 1958-10-02 Elektrochemische Fabrik Kempen Manufacture of lower leather

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