EP1124994A1 - Hilfsmittel für den hautaufschluss und die haarlockerung von tierhäuten - Google Patents
Hilfsmittel für den hautaufschluss und die haarlockerung von tierhäutenInfo
- Publication number
- EP1124994A1 EP1124994A1 EP00940306A EP00940306A EP1124994A1 EP 1124994 A1 EP1124994 A1 EP 1124994A1 EP 00940306 A EP00940306 A EP 00940306A EP 00940306 A EP00940306 A EP 00940306A EP 1124994 A1 EP1124994 A1 EP 1124994A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liming
- hair
- aid according
- aid
- skin
- 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
Links
- 210000004209 hair Anatomy 0.000 title claims abstract description 36
- 241001465754 Metazoa Species 0.000 title claims abstract description 12
- 239000000243 solution Substances 0.000 claims abstract description 21
- 239000003945 anionic surfactant Substances 0.000 claims abstract description 11
- 150000003839 salts Chemical class 0.000 claims abstract description 9
- 150000004676 glycans Chemical class 0.000 claims abstract description 8
- 229920001282 polysaccharide Polymers 0.000 claims abstract description 8
- 239000005017 polysaccharide Substances 0.000 claims abstract description 8
- HDFRDWFLWVCOGP-UHFFFAOYSA-N carbonothioic O,S-acid Chemical compound OC(S)=O HDFRDWFLWVCOGP-UHFFFAOYSA-N 0.000 claims abstract description 6
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims abstract description 5
- 125000000129 anionic group Chemical group 0.000 claims abstract description 5
- 239000002736 nonionic surfactant Substances 0.000 claims abstract description 5
- 239000007864 aqueous solution Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 12
- CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical compound OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 claims description 8
- 235000013379 molasses Nutrition 0.000 claims description 7
- 230000003165 hydrotropic effect Effects 0.000 claims description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 6
- DLFVBJFMPXGRIB-UHFFFAOYSA-N Acetamide Chemical compound CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 4
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 claims description 4
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethyl mercaptane Natural products CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 claims description 4
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 claims description 4
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 claims description 4
- 229910052945 inorganic sulfide Inorganic materials 0.000 claims description 3
- JBVOQKNLGSOPNZ-UHFFFAOYSA-N 2-propan-2-ylbenzenesulfonic acid Chemical compound CC(C)C1=CC=CC=C1S(O)(=O)=O JBVOQKNLGSOPNZ-UHFFFAOYSA-N 0.000 claims description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
- OHLUUHNLEMFGTQ-UHFFFAOYSA-N N-methylacetamide Chemical compound CNC(C)=O OHLUUHNLEMFGTQ-UHFFFAOYSA-N 0.000 claims description 2
- 150000001447 alkali salts Chemical class 0.000 claims description 2
- 239000001110 calcium chloride Substances 0.000 claims description 2
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- 239000004202 carbamide Substances 0.000 claims description 2
- 150000001720 carbohydrates Chemical class 0.000 claims description 2
- 235000014633 carbohydrates Nutrition 0.000 claims description 2
- 229940071118 cumenesulfonate Drugs 0.000 claims description 2
- 229960000789 guanidine hydrochloride Drugs 0.000 claims description 2
- PJJJBBJSCAKJQF-UHFFFAOYSA-N guanidinium chloride Chemical compound [Cl-].NC(N)=[NH2+] PJJJBBJSCAKJQF-UHFFFAOYSA-N 0.000 claims description 2
- 125000003396 thiol group Chemical class [H]S* 0.000 claims 2
- 241000283153 Cetacea Species 0.000 claims 1
- 229960002713 calcium chloride Drugs 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 159000000011 group IA salts Chemical class 0.000 abstract 1
- RVEZZJVBDQCTEF-UHFFFAOYSA-N sulfenic acid Chemical compound SO RVEZZJVBDQCTEF-UHFFFAOYSA-N 0.000 abstract 1
- 150000003568 thioethers Chemical class 0.000 abstract 1
- 210000003491 skin Anatomy 0.000 description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 239000010985 leather Substances 0.000 description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- 102000004190 Enzymes Human genes 0.000 description 11
- 108090000790 Enzymes Proteins 0.000 description 11
- 210000002615 epidermis Anatomy 0.000 description 8
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 7
- 239000000920 calcium hydroxide Substances 0.000 description 7
- 235000011116 calcium hydroxide Nutrition 0.000 description 7
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 7
- 230000008961 swelling Effects 0.000 description 6
- 102000008186 Collagen Human genes 0.000 description 5
- 108010035532 Collagen Proteins 0.000 description 5
- 229920001436 collagen Polymers 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 210000002808 connective tissue Anatomy 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052979 sodium sulfide Inorganic materials 0.000 description 4
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
- 102000011782 Keratins Human genes 0.000 description 3
- 108010076876 Keratins Proteins 0.000 description 3
- 235000011941 Tilia x europaea Nutrition 0.000 description 3
- 238000013019 agitation Methods 0.000 description 3
- 230000029087 digestion Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 102000004169 proteins and genes Human genes 0.000 description 3
- 108090000623 proteins and genes Proteins 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 238000007920 subcutaneous administration Methods 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 208000032544 Cicatrix Diseases 0.000 description 2
- 102000016942 Elastin Human genes 0.000 description 2
- 108010014258 Elastin Proteins 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 108091005804 Peptidases Proteins 0.000 description 2
- 229920000388 Polyphosphate Polymers 0.000 description 2
- 239000004365 Protease Substances 0.000 description 2
- 102100037486 Reverse transcriptase/ribonuclease H Human genes 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 230000000844 anti-bacterial effect Effects 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 239000003899 bactericide agent Substances 0.000 description 2
- 230000002951 depilatory effect Effects 0.000 description 2
- 210000004207 dermis Anatomy 0.000 description 2
- 229920002549 elastin Polymers 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000002366 lipolytic effect Effects 0.000 description 2
- 150000002897 organic nitrogen compounds Chemical class 0.000 description 2
- 239000001205 polyphosphate Substances 0.000 description 2
- 235000011176 polyphosphates Nutrition 0.000 description 2
- 230000002797 proteolythic effect Effects 0.000 description 2
- 231100000241 scar Toxicity 0.000 description 2
- 230000037387 scars Effects 0.000 description 2
- PXQLVRUNWNTZOS-UHFFFAOYSA-N sulfanyl Chemical class [SH] PXQLVRUNWNTZOS-UHFFFAOYSA-N 0.000 description 2
- 150000004763 sulfides Chemical class 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 102000009027 Albumins Human genes 0.000 description 1
- 108010088751 Albumins Proteins 0.000 description 1
- 241000283707 Capra Species 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 102000006395 Globulins Human genes 0.000 description 1
- 108010044091 Globulins Proteins 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 241001494479 Pecora Species 0.000 description 1
- 102000016611 Proteoglycans Human genes 0.000 description 1
- 108010067787 Proteoglycans Proteins 0.000 description 1
- 241000282887 Suidae Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 210000000270 basal cell Anatomy 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 235000015278 beef Nutrition 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- LBVNUQQORDPZCR-UHFFFAOYSA-N calcium;sulfane Chemical compound S.[Ca] LBVNUQQORDPZCR-UHFFFAOYSA-N 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- HFCSXCKLARAMIQ-UHFFFAOYSA-L disodium;sulfate;hydrate Chemical compound O.[Na+].[Na+].[O-]S([O-])(=O)=O HFCSXCKLARAMIQ-UHFFFAOYSA-L 0.000 description 1
- 230000003619 fibrillary effect Effects 0.000 description 1
- 210000004919 hair shaft Anatomy 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 230000003752 improving hair Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001530 keratinolytic effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 150000003139 primary aliphatic amines Chemical class 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 210000000106 sweat gland Anatomy 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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
- C14C1/06—Facilitating unhairing, e.g. by painting, by liming
Definitions
- the object of the invention is an aid for skin disintegration and hair loosening, which is used in the manufacture of so-called liming of the untanned dermis, the so-called nakedness, freed of epidermis and subcutaneous connective tissue.
- the overall process of leather production consists of three main work steps, namely the water workshop, tanning and finishing.
- the salted and dried skin material is first returned to the hydrated state of the green skin by soaking. This is followed by treatment with alkaline hair loosening baths for the purpose of hair loosening and hair digestion. Hair loosening and skin disruption are generally carried out in a single process step, the liming. Fermentative loosening processes are also in use and processes in which the hair is completely destroyed by the action of keratolyzing agents. Swelling and alkaline reaction are finally eliminated by neutralization. In this state the skin is called "nakedness".
- Hair roots depend on whether the hair can be chemically destroyed or should be preserved. Are the Hair of less value, then chemical depilatory agents are applied directly to the hair side of the skin, the hair shafts being destroyed or at least more or less attacked.
- a sulphide-containing lime suspension is usually used for this. It is customary in industry to carry out this treatment (liming) in large vessels with movement.
- the lime suspension also affects the leather-forming skin substance. This change in the skin substance, the cremation, is very important for tanning. In order to obtain an optimal liming effect, you are often ready to take no account of hair preservation, even in cases where the hair could still be used well.
- the skin substance is primarily broken down by alkaline swelling, i.e. loosened up in their structure, which leads to greater porosity of the leather and to particular softness or speed, which e.g. is desirable for glove leather.
- alkaline swelling i.e. loosened up in their structure
- some accompanying proteins of the fibrillary connective tissue are removed.
- the duration and intensity of the liming can only be determined empirically, as the types of skin react very differently to the liming. Excessive swelling can result in "loose” or "trickling" scars, i.e.
- the uppermost layer of skin which contains hair root pores, emptied sweat glands and a branched blood vessel system, detaches from the underlying, compact fiber layer when the leather is bent and forms wrinkles.
- Ashes are understood to mean loosening of the hair and digestion of the skin, since they are often combined into one process. Most of the time, the two sub-processes overlap only partially, since one usually loosens or destroys the hair first and then unlocks the skin substance. As with hair loosening, many individual factors also work together in skin disruption.
- the liming chemicals are primarily intended to attack the keratin in the hair and epidermis without destroying the collagen in the skin.
- the keratin can be removed by reduction and hydrolysis.
- hydrolytically active bases are, for example, calcium hydroxide, hydrated lime [with 80 to 96% Ca (OH) 2 ] and sodium hydroxide solution.
- sodium sulfide, sodium hydrogen sulfide and calcium hydrogen sulfide have a reductive effect. The action of these substances also destroys the epidermis, so that this layer together with the hair can be easily lifted off with a blunt hair knife or by machine. Similar to depilators, sodium sulfide has a reducing effect on the sulfur-containing amino acids in keratin; then the quicklime can attack more easily and cause hydrolytic cleavage of the preceratins in the basal cell layer of the epidermis.
- the untanned dermis freed of epidermis and subcutaneous connective tissue, contains 60 to 80% water and fat when moist, the rest consists of approximately 98% collagen.
- Molasses is preferably used as the polysaccharide solution in the aid according to the invention.
- the use of molasses in leather processing is known per se. Molasses can be added to all operations in the water workshop. The addition of molasses when liming is particularly valuable, as it significantly improves the solubility of the hydrated lime in the liquor and thus improves skin disruption.
- molasses is generally preferred as a particularly inexpensive polysaccharide solution, other solutions containing water-soluble carbohydrates, e.g. Sugar solutions containing about 10 to 70% by weight sugar.
- the auxiliary is a mercaptocarboxylic acid or one of its salts, preferably thioglycolic acid.
- This Mercaptocarboxylic acid for Keratolytica is already known. It is mainly used in hair treatment, but also as a depilatory. Thioglycolates have also been used in the tannery to depilate hides, but have not achieved particularly great technical importance for this application.
- the auxiliary according to the invention also contains a mercapto alcohol, in particular mercaptoethanol in the form of its sodium alcoholate. It is characterized by a pronounced hair-loosening effect.
- the aid according to the invention leads to a significant improvement in the quality of the leather thus obtained.
- the skilled worker will notice that lighter pelts are obtained when the aid according to the invention is used, and an improvement in the range of leather qualities can thus be achieved.
- the aid mentioned results in particularly smooth pelts and thus the loss of surface area, which always occurs in leather production from a skin, is kept very low.
- the aid according to the invention causes a very high level of lime solubility, which is a prerequisite for particularly good skin digestion.
- the aid according to the invention brings with regard to the traditionally quite high environmental impact in leather production.
- the amount of inorganic sulfides or hydrosulfides to be used in liming can be considerably reduced, the removal of which from the waste water can be a considerable technical problem.
- the swelling of the skin which occurs during liming can be regulated more easily by the combination aid according to the invention than in the case of exclusive addition of sulfides or hydrogen sulfides.
- the aid according to the invention contains neither proteolytic nor lipolytic enzymes, the use of which has hitherto been regarded as largely the standard in liming.
- enzymes not only have the disadvantage of being relatively expensive, they also require strictly controlled process conditions in order to achieve optimal results. If the optimal temperature and pH conditions are not met when using enzymes to treat animal skins, the effects of the enzymes used are often inadequate, but sometimes too intense.
- the aid according to the invention can be further improved by adding hydrotropic substances.
- hydrotropic substances are substances whose addition improves the water solubility of another, poorly soluble substance. These include organic nitrogen compounds such as urea, thiourea, formamide, acetamide, N-methylacetamide and guanidine hydrochloride. But also organic sulfonic acids and carboxylic acids and their salts, e.g. Cumene sulfonate and even calcium chloride have hydrotropic effects. Hydrotropics work on proteins such as in the collagen structure of the skin, a splitting of the hydrogen bonds between the peptide chains and thus swelling, which facilitates the access of the keratinolytic active ingredients, but also that of the anionic or nonionic surfactants used for the fat solution.
- the auxiliary according to the invention is used in the process for skin disintegration and for loosening the hair of animal skins in addition to the commonly used alkalis, inorganic sulfides or hydrosulfides and anionic or nonionic surfactants in an aqueous solution, it usually being used in an amount of 0.1 to 5% by weight. -% is used.
- the process is generally at a pH above 11, preferably at a pH between 12 and 12.5 and at temperatures between 25 and 35 ° C for a period of 15 to 20 hours with temporary movement of the animal hides in the Liming drums used. With the paleness obtained from the raw skin by this process, particularly clean and light leather qualities can be produced, from which the hair roots are almost completely removed.
- the process is easy to control and gives excellent and consistent leather qualities.
- the environmental impact is significantly reduced since the wastewater obtained by the process according to the invention contains significantly fewer sulfides and no amines or other nitrogen-containing compounds. It is excellently suited for processing all kinds of hides, such as those of sheep, goats, pigs, but especially for processing beef hides.
- Example 1 Hair-destroying treatment of cowhides in switches and limbers
- naupr.- soft 150% water 28 ° C
- the skin is then fleshed, split and subjected to normal processing.
- Example 2 Hair-preserving treatment of cowhides in switches and limbers
- the skin is then fleshed, split and subjected to normal processing.
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)
- Cosmetics (AREA)
- Medicines Containing Material From Animals Or Micro-Organisms (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19933968 | 1999-07-20 | ||
| DE19933968A DE19933968A1 (de) | 1999-07-20 | 1999-07-20 | Hilfsmittel für den Hautaufschluß und die Haarlockerung von Tierhäuten |
| PCT/EP2000/005076 WO2001006020A1 (de) | 1999-07-20 | 2000-06-03 | Hilfsmittel für den hautaufschluss und die haarlockerung von tierhäuten |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1124994A1 true EP1124994A1 (de) | 2001-08-22 |
| EP1124994B1 EP1124994B1 (de) | 2004-03-17 |
Family
ID=7915401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00940306A Revoked EP1124994B1 (de) | 1999-07-20 | 2000-06-03 | Hilfsmittel für den hautaufschluss und die haarlockerung von tierhäuten |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US6689172B1 (de) |
| EP (1) | EP1124994B1 (de) |
| KR (1) | KR20010079687A (de) |
| CN (1) | CN1242073C (de) |
| AT (1) | ATE262043T1 (de) |
| AU (1) | AU5528400A (de) |
| BR (1) | BR0006176A (de) |
| DE (2) | DE19933968A1 (de) |
| ES (1) | ES2215677T3 (de) |
| WO (1) | WO2001006020A1 (de) |
| ZA (1) | ZA200007294B (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10221152B4 (de) * | 2002-05-13 | 2008-10-30 | Schill + Seilacher Ag | Verfahren zur Herstellung sauberer Blößen in der Wasserwerkstatt |
| AR039980A1 (es) * | 2002-05-22 | 2005-03-09 | Basf Ag | Procedimiento para eliminar sustancias corneas de pieles o pellejos |
| US7162289B2 (en) * | 2002-09-27 | 2007-01-09 | Medtronic Minimed, Inc. | Method and apparatus for enhancing the integrity of an implantable sensor device |
| CN102071268A (zh) * | 2011-01-12 | 2011-05-25 | 宁波工程学院 | 一种生皮的干法保毛脱毛处理方法 |
| CN104711380B (zh) * | 2015-04-07 | 2016-08-17 | 无极县星皓皮革制品有限公司 | 一种酶脱毛助剂及其制备方法 |
| CN105132600B (zh) * | 2015-08-21 | 2017-05-31 | 四川大学 | 调控蛋白酶对动物皮内胶原蛋白和弹性蛋白选择性作用的方法 |
| CN110358874A (zh) * | 2018-04-09 | 2019-10-22 | 徐州鸿丰高分子材料有限公司 | 保毛脱毛剂制备及其保毛脱毛方法 |
| DE102018110284A1 (de) | 2018-04-27 | 2019-10-31 | Werner & Mertz Gmbh | Wässrige Zusammensetzung zum Auflösen von Haaren sowie entsprechende Verwendungen und Verfahren |
| US11700860B2 (en) | 2018-09-27 | 2023-07-18 | The United States Of America, As Represented By The Secretary Of Agriculture | Method to clean and decontaminate animal carcasses using alkaline thioglycolate-containing compound |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| YU36755B (en) * | 1971-11-17 | 1984-08-31 | Basf Ag | Process for the elimination of hairs from hides and furs |
| DE2911401A1 (de) * | 1979-03-23 | 1980-10-02 | Roehm Gmbh | Verfahren zum aeschern von bloessen aus tierischen haeuten und fellen |
| DE2917376C2 (de) | 1979-04-28 | 1987-03-26 | Röhm GmbH, 6100 Darmstadt | Enzymatisches Verfahren zur Haargewinnung und zum gleichzeitigen Hautaufschluß |
| US4631064A (en) * | 1982-06-01 | 1986-12-23 | The Proctor & Gamble Company | Depilatory compositions |
| DE29503135U1 (de) | 1995-02-24 | 1995-05-24 | Röhm GmbH, 64293 Darmstadt | Mehrfunktionelle Lederbearbeitungsmittel |
-
1999
- 1999-07-20 DE DE19933968A patent/DE19933968A1/de not_active Withdrawn
-
2000
- 2000-06-03 BR BR0006176-0A patent/BR0006176A/pt not_active Application Discontinuation
- 2000-06-03 AU AU55284/00A patent/AU5528400A/en not_active Abandoned
- 2000-06-03 KR KR1020017002410A patent/KR20010079687A/ko not_active Withdrawn
- 2000-06-03 EP EP00940306A patent/EP1124994B1/de not_active Revoked
- 2000-06-03 AT AT00940306T patent/ATE262043T1/de not_active IP Right Cessation
- 2000-06-03 WO PCT/EP2000/005076 patent/WO2001006020A1/de not_active Ceased
- 2000-06-03 CN CNB008008876A patent/CN1242073C/zh not_active Expired - Fee Related
- 2000-06-03 ES ES00940306T patent/ES2215677T3/es not_active Expired - Lifetime
- 2000-06-03 DE DE50005677T patent/DE50005677D1/de not_active Revoked
- 2000-06-30 US US09/786,907 patent/US6689172B1/en not_active Expired - Fee Related
- 2000-12-08 ZA ZA200007294A patent/ZA200007294B/xx unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0106020A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19933968A1 (de) | 2001-01-25 |
| CN1242073C (zh) | 2006-02-15 |
| CN1304455A (zh) | 2001-07-18 |
| ZA200007294B (en) | 2001-10-11 |
| BR0006176A (pt) | 2001-04-17 |
| ES2215677T3 (es) | 2004-10-16 |
| EP1124994B1 (de) | 2004-03-17 |
| KR20010079687A (ko) | 2001-08-22 |
| AU5528400A (en) | 2001-02-05 |
| DE50005677D1 (de) | 2004-04-22 |
| US6689172B1 (en) | 2004-02-10 |
| WO2001006020A1 (de) | 2001-01-25 |
| ATE262043T1 (de) | 2004-04-15 |
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