EP0029906B1 - Procédé pour diminuer les frottements lors des étapes en milieu liquide de la fabrication du cuir - Google Patents

Procédé pour diminuer les frottements lors des étapes en milieu liquide de la fabrication du cuir Download PDF

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Publication number
EP0029906B1
EP0029906B1 EP80106296A EP80106296A EP0029906B1 EP 0029906 B1 EP0029906 B1 EP 0029906B1 EP 80106296 A EP80106296 A EP 80106296A EP 80106296 A EP80106296 A EP 80106296A EP 0029906 B1 EP0029906 B1 EP 0029906B1
Authority
EP
European Patent Office
Prior art keywords
friction
skins
leather
reducing
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.)
Expired
Application number
EP80106296A
Other languages
German (de)
English (en)
Other versions
EP0029906A1 (fr
Inventor
Knud Lassen
France Knaflic
Franz Dr. Leppmeier
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Priority to AT80106296T priority Critical patent/ATE2153T1/de
Publication of EP0029906A1 publication Critical patent/EP0029906A1/fr
Application granted granted Critical
Publication of EP0029906B1 publication Critical patent/EP0029906B1/fr
Expired legal-status Critical Current

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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
    • C14C1/00—Chemical treatment prior to tanning
    • 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

Definitions

  • the invention was therefore based on the object, an inert, ie. H. not to develop annoying lubricants for the wet processes, especially for the switch and liming, in any work step of leather production.
  • This object is achieved by a method according to the claims.
  • Wet processes mean operations in the water workshop from the switch to the liming, the cooling, the pimple, the tanning, the retanning to the dyeing.
  • Suitable water-soluble polymers according to the invention are primarily suitable polymers containing carboxyl groups, for example polymers of acrylic acid, methacrylic acid, partially saponified poly (meth) acrylic esters, in each case partially saponified poly (meth) acrylonitrile or poly (meth) acrylamide, carboxymethyl cellulose Copolymers of maleic anhydride with copolymerizable monomers such as styrene; Vinyl isobutyl ether; Ethylene; 1-olefins, such as isobutene, the anhydride groups of the polymer being hydrolyzed and the carboxyl groups formed being neutralized by bases.
  • suitable polymers containing carboxyl groups for example polymers of acrylic acid, methacrylic acid, partially saponified poly (meth) acrylic esters, in each case partially saponified poly (meth) acrylonitrile or poly (meth) acrylamide, carboxymethyl cellulose Copolymers of maleic anhydride with copolymerizable
  • water-soluble high polymers without carboxyl groups for example poly (meth) acrylamide, polyvinyl alcohol, polyvinyl pyrrolidone, polyethylene oxide, cationic, i.e. H.
  • Poly (meth) acrylic esters containing amino groups for example acryloyloxyethyl diethylamine, and of all the monomers mentioned with and without carboxyl groups, the copolymers with one another and with other copolymerizable monomers in amounts such that the polymers are still sufficiently water-soluble (at least 2 g / i) .
  • cationic and nonionic water-soluble polymers are preferred.
  • the polymers are used in concentrations of 0.05 to 2, preferably 0.2 to 1.7 g / l.
  • concentrations 0.05 to 2, preferably 0.2 to 1.7 g / l.
  • the effect below is too small; on the other hand, more is not necessary and also not desirable because the lubricant has to be washed out later and pollutes the waste water.
  • the decisive factor for the suitability of the polymers in the sense of the invention is their molecular weight. This is measured here by the K value according to H. Fikentscher, Cellulosechemie 13 (1932), pages 58 to 64 and 71 to 74, in 10% concentration in a 5% saline solution at 20 ° C. It should be more than 150, preferably 180 to 250. Polymers with lower K values do not give or (due to absorption through the skin) only temporarily the desired sliding effect; those with significantly higher K values are generally difficult to produce.
  • polyacrylic acid with an Engler viscosity at 25 ° C. in 20% aqueous solution of 1 to 50, preferably 2 to 8, is also used in pickling and tanning. A reduction in the friction of the skins is not mentioned there; the molecular weight of polyacrylic acid would also be far too low for this.
  • copolymers of acrylic acid containing quaternary ammonium salts which are also used according to DE-A-1 930 225 in the treatment, in particular in the tanning of hides, and an Engler viscosity at 20 ° C. in 20% aqueous solution of 1.2 up to 2.5 or molecular weights from 1000 to 50,000.
  • the molecular weights of the water-soluble polymers to be used according to the invention are in the order of millions. Even at about 1%, the solution is generally viscous and is therefore no longer usable in the sense of the invention.
  • the claims are based on the K value and not on the molecular weight, because the former is incomparably easier and more reliable to determine.
  • the chemicals are better distributed, thus better leather quality (reduction of bad hair removal in the area of the shooter); the energy consumption when rotating the barrels is lower; the formation of chafing and "false backs" is largely avoided, and curling up when processing halves no longer occurs; after all, the nakedness is much cleaner, although flushing time and flushing water consumption are less than usual.
  • the pelts are erased faster, smoother and have a finer grain than with a limer without the additive according to the invention. Rinsing is also faster.
  • Chromium tanning of bovine skins in a 3-chamber vessel Percentages based on the weight of the bare skin

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)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Lubricants (AREA)
  • Braking Arrangements (AREA)
  • Mechanical Operated Clutches (AREA)

Claims (2)

1. Procédé pour réduire les frottements dans les opérations au mouillé de la fabrication de cuirs par addition de lubrifiants, caractérisé en ce que l'on emploie comme lubrifiant un polymère hydrosoluble avec une valeur K selon Fikentscher supérieure à 150 à raison de 0,05 à 2 g par litre de bain.
2. Procédé suivant la revendication 1, caractérisé en ce que l'on utilise des polymères à groupes carboxyle.
EP80106296A 1979-10-24 1980-10-16 Procédé pour diminuer les frottements lors des étapes en milieu liquide de la fabrication du cuir Expired EP0029906B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80106296T ATE2153T1 (de) 1979-10-24 1980-10-16 Verfahren zur verminderung der reibung bei nassprozessen der lederherstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2942858 1979-10-24
DE19792942858 DE2942858B1 (de) 1979-10-24 1979-10-24 Verfahren zur Verminderung der Reibung bei Nassprozessen der Lederherstellung

Publications (2)

Publication Number Publication Date
EP0029906A1 EP0029906A1 (fr) 1981-06-10
EP0029906B1 true EP0029906B1 (fr) 1982-12-29

Family

ID=6084193

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80106296A Expired EP0029906B1 (fr) 1979-10-24 1980-10-16 Procédé pour diminuer les frottements lors des étapes en milieu liquide de la fabrication du cuir

Country Status (5)

Country Link
EP (1) EP0029906B1 (fr)
JP (1) JPS5667400A (fr)
AT (1) ATE2153T1 (fr)
AU (1) AU6362380A (fr)
DE (2) DE2942858B1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3406912C1 (de) * 1984-02-25 1985-09-05 Benckiser-Knapsack Gmbh, 6802 Ladenburg Verfahren zum Nachgerben von mineralgegerbtem Leder
YU71587A (en) * 1986-04-28 1988-10-31 Commw Scient & Ind Res Process for treating animal hides with fur
US5300121A (en) * 1987-04-28 1994-04-05 Commonwealth Scientific And Industrial Research Organisation Process for the treatment of wool skins

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1415763A (fr) * 1964-09-17 1965-10-29 Progil Adjuvants pour le tannage des peaux
FR1601410A (en) * 1968-06-14 1970-08-24 Copolymers of unsatd organic acids and quaternised - amines as tanning agents

Also Published As

Publication number Publication date
AU6362380A (en) 1981-04-30
DE2942858B1 (de) 1981-03-19
JPS5667400A (en) 1981-06-06
EP0029906A1 (fr) 1981-06-10
DE3061516D1 (en) 1983-02-03
ATE2153T1 (de) 1983-01-15

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