EP0569410B1 - Procede d'auto-tannage, de pre-tannage et de co-tannage de cuirs et de peaux, et de retannage de cuirs et de peaux - Google Patents

Procede d'auto-tannage, de pre-tannage et de co-tannage de cuirs et de peaux, et de retannage de cuirs et de peaux Download PDF

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Publication number
EP0569410B1
EP0569410B1 EP92903337A EP92903337A EP0569410B1 EP 0569410 B1 EP0569410 B1 EP 0569410B1 EP 92903337 A EP92903337 A EP 92903337A EP 92903337 A EP92903337 A EP 92903337A EP 0569410 B1 EP0569410 B1 EP 0569410B1
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EP
European Patent Office
Prior art keywords
tanning
groups
leather
hides
weight
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EP92903337A
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German (de)
English (en)
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EP0569410A1 (fr
Inventor
Juergen Weiser
Wolfgang Reuther
Hermann Birkhofer
Karl Stork
Ortwin Schaffer
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BASF SE
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BASF SE
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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
    • C14C3/00—Tanning; Compositions for tanning
    • C14C3/02—Chemical tanning
    • C14C3/08—Chemical tanning by organic agents
    • C14C3/16—Chemical tanning by organic agents using aliphatic aldehydes

Definitions

  • the present invention relates to an improved method for sole tanning, pretanning and tanning of pelts and pelts and for retanning leather and hide.
  • DE-A-17 69 059 relates to a process for leather production by treating tannable material with zinc salts, water-soluble sulfates and aldehydes or aldehyde-releasing substances and aftertreatment with dulling agents.
  • acetal residues the residues customary for this are usually used, for example C1-C8-alkyl groups, preferably C1-C4-alkyl groups, such as methyl, ethyl, n-propyl, n-butyl or 2-ethylhexyl.
  • the two acetal residues can be different or preferably the same.
  • these two radicals can form a five- or six-membered ring, for example a 1,3-dioxolane, 1,3-dioxane, 5,5-dimethyl-1,3-dioxane or 5-n-butyl-5 -ethyl-1,3-dioxane ring.
  • the compound I and its acetals are known in principle; they are prepared by the relevant methods given in the literature.
  • the tanning process according to the invention is outstandingly suitable for tanning alone and pretanning skins and skins in an aqueous liquor.
  • the procedure here is such that the pickled pelts, for example cowhide pelts with a gap thickness of 1.5 to 4 mm, or pelts, for example sheepskin pelts, at a pH of 2 to 7, in particular 2.5 to 4, and one Temperature of 15 to 50 °, in particular 25 to 45 ° C, are treated with an aqueous solution or dispersion of the carbonyl compound I for a period of 3 to 20 hours.
  • the treatment takes place, for example, by drumming in a barrel.
  • the required amount of carbonyl compound I is normally 2 to 30% by weight, in particular 5 to 20% by weight, based on the pelt weight.
  • the fleet length, i.e. the percentage weight ratio of the treatment liquor to the goods is usually 30 to 200% for the bare and 100 to 2000% for the bare, in each case based on the bare weight.
  • the leather or fur is usually adjusted to a pH of 4 to 8, in particular 5 to 7, for which purpose magnesium oxide, sodium carbonate or sodium hydrogen carbonate is used, optionally treated with further tanning agents and, if desired, dyed after the tanning process has ended and greased.
  • the tanning process according to the invention is also outstandingly suitable for tanning bare and pelted skin together with the tanning agents of the main tanning process, which can be, for example, chrome or aluminum tanning.
  • the working conditions regarding pH, temperature and duration of the treatment are adjusted to the requirements of the main components of the tanning, the same applies to the Treatment equipment and the length of the liquor as well as for post-treatment.
  • the amount of carbonyl compound I required is normally 0.1 to 20% by weight, in particular 0.5 to 15% by weight, based on the pelt weight.
  • the tanning process according to the invention is also outstandingly suitable for retanning leather and fur which has already been tanned, for example chrome leather, in an aqueous liquor. It is usually carried out in such a way that the pickled pelts and skins, for example cowhide pelts with a gap thickness of 1.5 to 4 mm, are used, for example, with a customary chromium-containing tanning agent such as a chromium (III) salt, e.g.
  • a customary chromium-containing tanning agent such as a chromium (III) salt, e.g.
  • Chromium (III) sulfate tanned in a manner known per se, the pretanned skins obtained in this way (in the case of chrome tanning "wet blues") deacidified and at a pH of 2 to 7, in particular 2.5 to 4, and at temperatures of 15 to 50 ° C, in particular 25 to 45 ° C, treated with an aqueous solution or dispersion of the carbonyl compound I for a period of 1 to 12 hours.
  • This treatment takes place, for example, by drumming in a barrel.
  • the amount of carbonyl compound I required, based on the shaved weight of the leather, is normally 2 to 30% by weight, in particular 5 to 20% by weight.
  • the liquor length is usually 30 to 200% for bare and 100 to 2000% for bare, each based on the fold weight of the leather.
  • the leather or fur is usually adjusted to a pH of 3 to 5, for which purpose magnesium oxide or an organic acid such as formic acid or its salts are used, and, if desired, dyed and greased after the treatment.
  • the leather or fur retanned according to the invention may also have been treated with other tanning agents, such as polymer tanning agents or syntans, before retanning with the carbonyl compound I.
  • the carbonyl compound I can also be used simultaneously with such additional tanning agents, for example in main tanning.
  • tanning agents As additional or simultaneously used tanning agents, all usual agents with tanning effects on bare or fur bare are considered. A comprehensive treatment of such tannins can be found, for example, in Ullmann's Encyclopedia of Industrial Chemistry, 3rd edition, 11th volume, pages 585 to 612 (1960). Tannin classes to be mentioned individually are the mineral tannins, for example chromium, aluminum, zinc and zirconium salts, the synthetic tannins such as the polymer tannins and syntans already mentioned above, and the vegetable (vegetable) tannins.
  • mineral tannins for example chromium, aluminum, zinc and zirconium salts
  • synthetic tannins such as the polymer tannins and syntans already mentioned above
  • vegetable (vegetable) tannins the vegetable (vegetable) tannins.
  • leather and furs are produced which, in comparison to the products obtained with previously known aldehyde tannins such as glutardialdehyde, have not only a full and very soft feel and, in addition to high shrinking temperatures, but also a significantly improved tear and tensile strength.
  • the leather and skins tanned according to the invention no longer have a disturbing yellow color.
  • Another advantage of the tanning process according to the invention is the low volatility of the carbonyl compound I used, which has an effect, for example, on the amount of these tanning agents used, which need only be relatively low. Furthermore, the carbonyl compound I is, in a sense, a universal tanning agent since it can be combined with all other customary tanning agents and can be used both for the sole, the pre, the co-tanning and for the retanning.
  • a white leather with a shrinking temperature of approx. 85 ° C. was obtained, which was very soft and easy to grip.
  • a soft and non-slip leather with a shrinking temperature of approx. 90 ° C. was obtained.
  • Usual sheepskin pelt was mixed with 60% by weight of table salt, 12% by weight of common fatliquor and 18% by weight of 3-oxaglutardialdehyde, based in each case on the dry weight of the pelts, at a liquor length of 1500% and 4 hours at 35 ° C. and a pH of 3.2 in the barrel. Then a pH of 5.5 was set with sodium carbonate.

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)

Abstract

L'invention concerne un procédé d'auto-tannage, de pré-tannage et de co-tannage de cuirs et de peaux, et de retannage de cuirs et de peaux, procédé selon lequel on utilise des composés carbonyle de la formule (I) dans laquelle R1 représente hydrogène, des groupes alkyle C¿1?-C8, des groupes phénylalkyle ayant un total d'atomes de carbone pouvant aller jusqu'à 12 ou des groupes phényle, des restes phényle pouvant être substitués par un ou deux groupes alkyle C1-C4, groupes alcoxy C1-C4, groupes hydroxyle, groupes amino, groupes carboxyle, groupes sulfo ou atomes d'halogène; n vaut 1, 2, 3 ou ; et x représente le reste OH, SH, NH2 ou PH2, si n = 1, un pont O, S, SO, SO2, NH, NR?2¿, PH ou PR2, si n = 2, R2 représentant alkyle C¿1?-C4, un atome tertiaire N ou P ou le groupe trivalent P = 0, si n = 3, et un atome N quaternaire, si n = 4. On peut également utiliser les acétals ou les cétals correspondants des composés carbonyle de la formule (I).

Claims (1)

  1. Procédé pour le tannage isolé, le prétannage et le co-tannage de peaux et de cuirs en poils, ainsi que pour le retannage de cuirs et de peaux, caractérisé en ce qu'on utilise à cette fin le composé de formule I
    Figure imgb0004
     ainsi que ses acétals.
EP92903337A 1991-01-29 1992-01-21 Procede d'auto-tannage, de pre-tannage et de co-tannage de cuirs et de peaux, et de retannage de cuirs et de peaux Expired - Lifetime EP0569410B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4102545 1991-01-29
DE4102545A DE4102545A1 (de) 1991-01-29 1991-01-29 Verfahren zum alleingerben, vorgerben und mitgerben von bloessen und fellbloessen und zum nachgerben von leder und fell
PCT/EP1992/000116 WO1992013105A1 (fr) 1991-01-29 1992-01-21 Procede d'auto-tannage, de pre-tannage et de co-tannage de cuirs et de peaux, et de retannage de cuirs et de peaux

Publications (2)

Publication Number Publication Date
EP0569410A1 EP0569410A1 (fr) 1993-11-18
EP0569410B1 true EP0569410B1 (fr) 1995-03-29

Family

ID=6423909

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92903337A Expired - Lifetime EP0569410B1 (fr) 1991-01-29 1992-01-21 Procede d'auto-tannage, de pre-tannage et de co-tannage de cuirs et de peaux, et de retannage de cuirs et de peaux

Country Status (6)

Country Link
US (1) US5372609A (fr)
EP (1) EP0569410B1 (fr)
JP (1) JPH06504800A (fr)
DE (2) DE4102545A1 (fr)
ES (1) ES2070632T3 (fr)
WO (1) WO1992013105A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK0554216T3 (da) * 1992-01-28 1996-08-19 Ciba Geigy Ag Fremgangsmåde til pickling og forgarvning af ugarvede læderhuder
DE19906190A1 (de) * 1999-02-15 2000-08-17 Boehme Chem Fab Kg Gerbverfahren
BR9901948B1 (pt) * 1999-04-30 2008-11-18 processo de curtimento de couros com compostos carbonÍlicos.
EP2055481B1 (fr) * 2007-10-18 2017-08-16 Bobst Italia S.P.A. Ensemble racloir et un procédé pour permettre l'utilisation d'encres différentes
ITUB20152180A1 (it) * 2015-07-14 2017-01-14 Db Patents Ltd Metodo migliorato per conciare una pelle animale.
DE102016004191A1 (de) * 2016-04-06 2017-10-12 Tfl Ledertechnik Gmbh Zusammensetzung und Verfahren zur Gerbung basierend auf einem Acetal eines aldehydischen Gerbstoffes
DE102016004192A1 (de) * 2016-04-06 2017-10-12 Tfl Ledertechnik Gmbh Zusammensetzung und Verfahren zur Gerbung basierend auf einem Acetal eines aldehydischen Gerbstoffes
EP3529382B1 (fr) * 2016-10-18 2020-06-10 Stahl International B.V. Procédé de préparation de cuir

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2351338A (en) * 1943-08-02 1944-06-13 American Cyanamid Co Tanning with d'-methoxy-d-hydroxymethyl diglycollic aldehyde
US2516283A (en) * 1947-03-20 1950-07-25 Adolph H Winheim Resin impregnation of a dialdehyde tanned hide
BE593301A (fr) * 1959-07-24
DE1769059A1 (de) * 1968-03-28 1971-08-19 Basf Ag Verfahren zur Herstellung von Leder
DE2137603A1 (de) * 1971-07-27 1973-02-08 Diamalt Ag Mittel zum gerben von haeuten und fellen
DE2549527C3 (de) * 1975-11-05 1980-03-20 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von Leder
BR8605597A (pt) * 1985-11-13 1987-08-18 Cassella Farbwerke Mainkur Ag Tanino e processo para a sua obtencao e sua utilizacao

Also Published As

Publication number Publication date
JPH06504800A (ja) 1994-06-02
US5372609A (en) 1994-12-13
EP0569410A1 (fr) 1993-11-18
WO1992013105A1 (fr) 1992-08-06
ES2070632T3 (es) 1995-06-01
DE59201788D1 (de) 1995-05-04
DE4102545A1 (de) 1992-07-30

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