EP0025933A1 - Mélange adjuvant et procédé de trempage des peaux et des fourrures - Google Patents

Mélange adjuvant et procédé de trempage des peaux et des fourrures Download PDF

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Publication number
EP0025933A1
EP0025933A1 EP80105377A EP80105377A EP0025933A1 EP 0025933 A1 EP0025933 A1 EP 0025933A1 EP 80105377 A EP80105377 A EP 80105377A EP 80105377 A EP80105377 A EP 80105377A EP 0025933 A1 EP0025933 A1 EP 0025933A1
Authority
EP
European Patent Office
Prior art keywords
hides
skins
aid
surfactant
liquor
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.)
Granted
Application number
EP80105377A
Other languages
German (de)
English (en)
Other versions
EP0025933B1 (fr
Inventor
Erwin Dr. Hahn
Dietrich Dr. Lach
Rolf Streicher
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
Publication of EP0025933A1 publication Critical patent/EP0025933A1/fr
Application granted granted Critical
Publication of EP0025933B1 publication Critical patent/EP0025933B1/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
    • C14C1/04—Soaking

Definitions

  • the skin of the skins has various tasks to perform in the leather production process.
  • the skins should be returned to the state they were in after they were removed, i.e. dried or salted skins should have approximately the original water content after the turnout. Salted hides also need to be largely freed of salt.
  • the switch has the task of removing dirt such as manure, blood residues, soluble proteins and fats from the hides.
  • the switch should also prepare the skin for the subsequent liming. This means that the pH value in the switch should be between 8 and 10 in the entire cross-section of the skin in order to prevent a liming effect caused by an excessive pH jump.
  • a certain amount of hair loosening should also be achieved so that it loosens more quickly and completely in the liming.
  • the invention was therefore based on the object of developing a softening agent or a method for softening hides which fulfills all of the tasks described above, in particular also a certain loosening of hair, and which does not have the disadvantages mentioned, that is to say no sensitivity to oxidation and no toxicity and no smell.
  • the compounds of the formula I are easy to prepare by reacting thiosulfate with a correspondingly reactive organic compound, for example according to or analogously to the following equations:
  • the reaction products of sodium thiosulfate with chloroacetic acid and with ethylene oxide are particularly preferred.
  • organic compounds are also suitable for reaction with thiosulfate to form a substance of the general formula I, for example propylene oxide, n-butylene oxide-1,2, chloroacetonitrile, 3-chloropropionitrile, 2-chloropropionitrile, 2- Chloroacetamide, 2-chloropropionamide, 3-chloropropionamide, ethyl chloride, n-propyl chloride, isopropyl chloride, n-octyl bromide, benzyl chloride, maleic anhydride, 3-chloropropionic acid, 2-chloropropionic acid, acrylic acid, crotonic acid and ß-chloroethanol.
  • propylene oxide n-butylene oxide-1,2, chloroacetonitrile, 3-chloropropionitrile, 2-chloropropionitrile, 2- Chloroacetamide, 2-chloropropionamide, 3-chloropropionamide, ethyl chloride, n
  • the radical R in formula I can thus represent an aliphatic or araliphatic radical with up to 8 carbon atoms, and this can be substituted by one or more carboxyl or carboxylate, hydroxyl, nitrile and / or amide groups, M + in formula I represents an equivalent of a cation, for example K + , NH 4 + , 1/2 Mg ++ , 1/2 Ca ++ , preferably Na.
  • the softening conditions are the usual, i.e. liquor lengths of 200 to 1,000% water, calculated on the dry weight of the hides and skins, temperatures of 15 to 40, preferably 20 to 35 ° C. and softening times, depending on the type of skin, from 6 to 100, preferably 6 up to 48 hours.
  • the softening agent mixture likewise claimed also contains surfactants, bactericides and optionally water.
  • Nonionic and cationic surfactants are preferred.
  • Typical nonionic surfactants are, for example, the numerous commercially available ethylene oxide and propylene oxide adducts and their mixed (mostly not statistically, but in block form) adducts of mono-, di- and polyfunctional alcohols, amines and polyamines, amino alcohols, carboxylic acids, acid amides, alkylphenols and block copolymers of ethylene oxide and propylene oxide, the propylene oxide being completely or partially replaced by butylene oxide can.
  • Common cationic surfactants include fatty amine salts and quaternary ammonium compounds.
  • quaternary ammonium salts are preferably used for the bactericides, since these are particularly non-toxic and support the softening effect due to their surfactant character. Examples include: benzyltrimethylammonium chloride; Didecyldimethylammonium chloride; 3,4-dichlorobenzyltrimethylanmonium chloride; also the "Seifen- ⁇ le-Fette-Wwachs" 104 (1978), 433-478 by M.H. Angele called connections.
  • the active ingredient of the formula I according to the invention is used in the soft liquor in amounts of 0.01 to 0.4, preferably 0.05 to 0.3%, calculated on the dry weight of the skins.
  • the salt weight is to be assumed as 2.5 times the dry weight as usual, in other words: with regard to the salt weight instead of the dry weight, the stated amounts are to be divided by 2.5.
  • Two halves of a salted cowhide are agitated for 20 minutes in liming barrels filled with 200% water at a temperature of 28 ° C, then left to rest for 20 minutes and then agitated again for 20 minutes. The water is then drained off. Thereafter, 150% 28 ° C.
  • a softening agent (I) which consists of 10 parts of sodium carboxymethylene thiosulfate, 30 parts of a commercially available propylene oxide ethylene oxide Block polymer, which is made from a propylene oxide block with a molecular weight of 1750 by reaction with 150 mol of ethylene oxide, 10 parts of benzyltrimethylammonium chloride and 50 parts of water. 150% 28 ° C. warm water, 0.5% soda and 0.5% of a softening agent (II), which consists of 30 parts of the above-mentioned PO-EO block polymer, 10 parts of benzyltrimethylammonium chloride and There are 60 parts of water.
  • a softening agent (II) which consists of 30 parts of the above-mentioned PO-EO block polymer, 10 parts of benzyltrimethylammonium chloride and There are 60 parts of water.
  • the two halves A and B of a dried cowhide of 8 parts by weight are treated as follows.
  • Half A is agitated in a liming drum in 1000% water at 30 ° C with the addition of 1% soda and 1.5% of the aid designated I in Example 1 for 18 hours.
  • Half B is softened with the addition of auxiliary means II in exactly the same way otherwise. After the turnout has ended, the hair in the half labeled A is much easier to remove than in the half B.
  • the ashing is carried out as indicated in Example 1.
  • Half A is significantly lighter than half B.
  • Example 3-5 the procedure is analogous to Example 1, except that sodium carboxymethylene thiosulfate is replaced by other compounds of the formula I in the softening agent. The details are shown in Table 1.
  • Example 2 the procedure is analogous to Example 2, except that the composition of the softening agent and the amount used are varied as indicated in Table 2.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Cosmetics (AREA)
  • Detergent Compositions (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
EP80105377A 1979-09-20 1980-09-09 Mélange adjuvant et procédé de trempage des peaux et des fourrures Expired EP0025933B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792938078 DE2938078A1 (de) 1979-09-20 1979-09-20 Hilfsmittel und verfahren zum weichen von haeuten
DE2938078 1979-09-20

Publications (2)

Publication Number Publication Date
EP0025933A1 true EP0025933A1 (fr) 1981-04-01
EP0025933B1 EP0025933B1 (fr) 1983-02-16

Family

ID=6081385

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80105377A Expired EP0025933B1 (fr) 1979-09-20 1980-09-09 Mélange adjuvant et procédé de trempage des peaux et des fourrures

Country Status (6)

Country Link
US (1) US4322210A (fr)
EP (1) EP0025933B1 (fr)
JP (1) JPS5653200A (fr)
AU (1) AU532669B2 (fr)
DE (2) DE2938078A1 (fr)
ES (1) ES495201A0 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060112494A1 (en) * 2004-12-01 2006-06-01 David Oppong Method of protecting an animal skin product from metalloproteinase activity

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2225601A (en) * 1936-06-26 1940-12-17 Wallerstein Co Inc Dehairing of skins and hides
US3567363A (en) * 1965-09-20 1971-03-02 Gillette Co Modification of keratin to the s-sulfo form
YU36755B (en) * 1971-11-17 1984-08-31 Basf Ag Process for the elimination of hairs from hides and furs
SU614142A1 (ru) * 1976-09-30 1978-07-05 Всесоюзный Научно-Исследовательский Институт Меховой Промышленности Состав дл обработки кожевой ткани меховых шкур

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Keine Entgegenhaltungen. *

Also Published As

Publication number Publication date
DE2938078A1 (de) 1981-04-09
ES8206629A1 (es) 1982-08-16
EP0025933B1 (fr) 1983-02-16
JPS5653200A (en) 1981-05-12
AU532669B2 (en) 1983-10-06
AU6254780A (en) 1981-04-09
JPS6361999B2 (fr) 1988-11-30
US4322210A (en) 1982-03-30
DE3062049D1 (en) 1983-03-24
ES495201A0 (es) 1982-08-16

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