EP1623047A1 - Agent de mise en suif pour la fabrication et le traitement de cuirs - Google Patents

Agent de mise en suif pour la fabrication et le traitement de cuirs

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Publication number
EP1623047A1
EP1623047A1 EP04731175A EP04731175A EP1623047A1 EP 1623047 A1 EP1623047 A1 EP 1623047A1 EP 04731175 A EP04731175 A EP 04731175A EP 04731175 A EP04731175 A EP 04731175A EP 1623047 A1 EP1623047 A1 EP 1623047A1
Authority
EP
European Patent Office
Prior art keywords
weight
range
component
native
proportion
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.)
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Application number
EP04731175A
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German (de)
English (en)
Inventor
Ralph Lunkwitz
Andreas Seitz
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
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Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Publication of EP1623047A1 publication Critical patent/EP1623047A1/fr
Withdrawn legal-status Critical Current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
    • C14C9/00—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes
    • C14C9/02—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes using fatty or oily materials, e.g. fat liquoring

Definitions

  • the present invention relates to a composition which contains native lipoid, synthetic polymer and a specific mixture of various alkoxylated alkanols and can preferably be used both in the production and treatment of leather, and the use of this fatliquor in the production and / or treatment of leather.
  • the present invention also relates to a method for greasing leather using the composition according to the invention.
  • the present invention further describes the use of a special emulsifier composition for the production and / or treatment of leather and for the production of a fatliquor for the production and / or treatment of leather.
  • Greasing agents are used in leather production to soften the leather, to increase its fullness and strength and to protect it from moisture, dirt and chemical influences from outside (see H. Herfeld, "Library of Leather", Vol. 4, (1985), p. 13 ff.).
  • Commercial greasing agents are products which generally consist of chemically modified native fats, oils, waxes, resins and their derivatives and / or petroleum fractions and their secondary products (see H. Herfeld, "Library of Leather", Vol. 4, (1985), pp. 59 ff.).
  • high-quality leather such as car upholstery leather has to meet certain criteria.
  • the softness is essential, on the other hand the authenticity to light and heat influences and finally the so-called fogging behavior.
  • DIN 75201 defines fogging as condensation of evaporated volatile components from the vehicle interior on the glass panes, especially on the windshield.
  • the same standard also describes a gravimetric and a reflectometric method for characterizing the fogging behavior of leather.
  • EP 0 498 634 A2 recommends special polymers for the production of so-called low-fogging leather, the aqueous dispersions being essentially free of organic solvents and containing an amphiphilic copolymer which consists of a predominant proportion of at least one hydrophobic monomer and a small proportion of at least one hydrophilic monomer.
  • Treatment of the leather with these dispersions leads to a gravimetric test according to DES. 75201 to good results. Reflectometric studies have not been disclosed.
  • These amphiphilic copolymers are preferably prepared in an aqueous emulsion polymerization.
  • EP 0466 392 B1 describes a process for the preparation of polymers which contain both pendant hydrophobic groups and pendant alkoxylated groups and which are obtained by derivatizing polymers after the actual polymerization process using customary processes.
  • polymers are preferably produced from simple monomers such as acrylamide and / or acrylic acid by conventional polymerization and then derivatized with a mixture of primary or hydrophobic amines and primary or secondary alkoxylated amines.
  • Such derivatized polymers are used as thickeners and soil release agents.
  • EP 0 927 271 B1 describes a further process for the preparation of polymers which are obtained by polymerizing acrylic acid and / or methacrylic acid and / or their acid chlorides and / or their anhydrides with further copolymerizable water-soluble monomers and with copolymerizable water-insoluble monomers and subsequently Implementation of the polymers with amines are shown.
  • DEM 75201 B gravimetry
  • 1.2 mg and 1.5 mg are listed for leather that has been treated with the listed sample products; the leather treated with the comparative products (Magnopal SOF, low-fogging polymer greasing agent, and Chromopol LFC, low-fogging greasing agent based on fish oils, both Stockhausen GmbH & Co. KG) achieved values of 3.9 mg and, respectively, 3.5 mg.
  • the reflectometric values according to DEM 75201 A of the sample products are 51% and 55%, those of the comparison products are 34% and 40%.
  • EP 0 753 585 A2 describes a low-fogging surface treatment for furniture leather and a process in which a specially treated virgin oil acts as the basis for greasing agents.
  • Native oils used are soybean, lard, safflower and sunflower oil. After distillation, these oils with a fatty acid content ( ⁇ C 16 ) of less than 3% are reacted with bisulfite or bisulfate, emulsified and used.
  • One object underlying the present invention was to provide a fatliquor which avoids the disadvantages of the known fatliquors and in particular the favorable product properties of synthetic-polymeric and native fatliquor additives.
  • components which is expressed, among other things, by the softness of the leather with simultaneous firm grain and good fullness, especially in the case of chrome-free tanned leather.
  • the product should also be able to meet the fogging limit values required by the market.
  • the present invention relates to a fatliquor for the manufacture and / or treatment of leather containing
  • A at least one native lipoid
  • B at least one polymer based on the monomers acrylic acid and / or methacrylic acid
  • C an emulsifier composition comprising a C 6 to C 17 alkanol alkoxylated with up to 12 alkylene oxide units or a mixture of two or more such alkanols and a C 12 to C 24 fatty alcohol mixture alkoxylated with at least 15 alkylene oxide units ,
  • the native lipoid there are no particular restrictions with regard to the native lipoid, as long as the desired product properties can be adjusted with it. Fats, fatty oils, waxes and phospholipids can in principle be used as native lipoids.
  • phospholipoids - which are known to be phosphoric acid diesters - in which the phosphoric acid can be esterified on the one hand with glycerol or sphingosine and on the other hand with choline, colamine, serine or inositol.
  • native lipoids inter alia native fats or fatty oils which can be of vegetable or animal origin.
  • Glycerides of natural fatty acids with a sufficient proportion of unsaturated acids may be mentioned in particular.
  • the mentioned native fats or fatty oils and the phospholipoids can each be present alone or as a mixture. It is thus possible to use a phospholipoid or a mixture of two or more phospholipoids or a fat or fatty oil or a mixture of two or more fats or fatty oils. A mixture of at least one phospholipoid and at least one fat or fatty oil can also be used. Before- In the context of the present invention, a mixture of at least one native oil and at least one native phospholipoid is used.
  • the at least one native oil and the at least one native phospholipoid can be used as such. It is also possible, for example, to use at least one native oil or at least one native phospholipoid or both at least one native oil and at least one native phospholipoid in a chemically modified manner.
  • lipoid mixtures are used in which each of the native oils and each of the native phospholipoids are chemically modified.
  • the present invention also describes a fatliquor as described above, which is characterized in that it contains a mixture as at least one chemically modified, native lipoid
  • the mixture according to (A) has a proportion of the at least one chemically modified, native oil in the range from 20 to 50% by weight, preferably in the range from 25 to 45% by weight and particularly preferably in the range from 30 to 40% by weight, based in each case on the total weight of the mixture (A).
  • the mixture according to (A) generally has a proportion in the range from 50 to 80% by weight, preferably in the range from 55 to 75% by weight and particularly preferably in the range from 60 to 70% by weight.
  • the present invention also relates to a fatliquor, as described above, which is characterized in that it contains component (Aa) in a range from 20 to 50% by weight and component (Ab) in a range from 50 to 80 wt .-%, each based on the total weight of component (A) contains.
  • native oils which have an iodine number of from approximately 10 to approximately 200.
  • Native oils with a low iodine number in the range mentioned are, for example, stearin or tung oil, native oils with a high iodine number in the range mentioned are, for example, the fish oils or the Chaulmoogra oil.
  • Native oils with an iodine number in the range from 10 to 200, preferably in the range from 30 to 120 and particularly preferably in the range from 40 to 85 are preferably used in the fatliquor according to the invention.
  • Examples of further particularly preferred native oils are, for example, fish oil, bone oil, nitro oil, claw oil, lard oil, soybean oil, rape oil, nut oil, olive oil, triolein or castor oil.
  • these native oils are suitably chemically modified in the context of the present invention.
  • this chemical modification consists in the fact that the C-C double bonds contained in the native oils have at least partially been subjected to addition and / or oxidation reactions.
  • the native oils are preferably modified by adding sulfites to the double bonds, thereby introducing sulfonic acid groups.
  • oxygen functions can be introduced by air oxidation or oligomerizations can occur. Hydrolysis or partial hydrolysis of the native oils, transesterifications or similar reactions are also preferably possible as a chemical modification.
  • Modified native oils which have a relatively high degree of oxidation and a relatively low degree of sulfation are particularly advantageous in the context of the fatliquor according to the invention, the chemically modified oils being formed by reaction of the olefinic double bonds present in the oils with the oxidation and / or the sulfi - Formation reagents.
  • all of the oils present in the which olefinic double bonds or only a part thereof react with the oxidation and / or the sulfitation reagents.
  • Air is preferably used as the oxidation reagent, the reaction with the olefinic double bonds present in the native oils being carried out at temperatures, for example preferably in the range from 60 to 80.degree.
  • the oxidation can also be carried out in accordance with other types known to the person skilled in the art.
  • relatively high degree of oxidation denotes a degree of oxidation of the native oils, on the basis of which the difference in the specific weights of the oil before and after the oxidation, ⁇ d, generally in the range from 0.01 to 0.1 g / ml, preferably in the range from 0.01 to 0.07 g / ml and particularly preferably in the range from 0.02 to 0.05 g / ml.
  • the sulfitation mentioned above is generally carried out by reacting the native oil with aqueous bisulfite liquor. It can also be carried out according to other methods known to those skilled in the art.
  • a very particularly preferred chemically modified, native oil is an oxidized and sulfated oil as described above, selected from the group consisting of fish oil, claw oil, lard oil, soybean oil, rapeseed oil, nut oil, olive oil and castor oil, is used in the fatliquor according to the invention, further preferably used as chemically modified, virgin oil oxidized and sulfated rapeseed oil.
  • the present invention also relates to a fatliquor, as described above, which is characterized in that a chemically modified, native oil according to (Aa) is sulfated rapeseed oil.
  • oxidized, sulfated rapeseed oil is used as the only chemically modified, native oil according to (Aa).
  • particularly preferred phospholipoids are lecithin and cephalin, it being possible, as described above, to use, for example, chemically unmodified lecithin or chemically unmodified cephalin.
  • the present invention also describes a fatliquor as described above, which is characterized in that a native phospholipoid is chemically unmodified lecithin.
  • Modified phospholipoids which are partially acetylated, in which an esterified fatty acid has been partially replaced by esterified acetic acid in accordance with methods known to the person skilled in the art are further preferred. This partial transesterification allows the viscosity and the hydrophilicity of the modified phospholipoid to be adjusted. Acetylated lecithin is used as a particularly preferred modified phospholipoid in the context of the present invention.
  • the degree of acetylation of the modified phospholipoid is generally in the range from up to 60%, preferably in the range up to 50%, particularly preferably in the range from 30 to 50% and particularly preferably in the range from 35 to 45%.
  • the present invention also relates to a fatliquor, as described above, which is characterized in that a chemically modified, native phospholipoid is acetylated lecithin.
  • the at least one polymer based on the monomers acrylic acid and / or methacrylic acid is concerned, there are no particular restrictions in this regard as long as the desired product property can be achieved therewith.
  • the polymer used according to the invention and based on the monomers acrylic acid and / or methacrylic acid generally has a molecular weight Mw in the range from 2,500 to 150,000 g / mol, preferably in the range from 5,000 to 130,000 g / mol, more preferably in the range from 10,000 to 110,000 g / mol, further particularly preferably in the range from 25,000 to 100,000 g / mol and particularly preferably in the range from 50,000 to 90,000 g / mol.
  • the polymer is further preferably used in the process according to the invention as an aqueous solution or dispersion of at least one salt of the polymer.
  • at least one carboxyl group of the polymer used according to the invention is present as a salt, the preferred cations of this salt being monovalent ions such as, for example, the alkali metal ions such as lithium, sodium, potassium, rubidium or cesium or an ammonium ion, NH 4 + or, for example, as ammonium ion a suitable mono-, di-, tri- or tetraalkylammonium ion can also be used.
  • the polymer salt used according to the invention can have, for example, one or more different of the cations mentioned above.
  • the different polymers can independently of one another have a single or two or more different cations mentioned above.
  • the at least one polymer is used as the sodium salt.
  • an acrylic acid homopolymer is used, it is generally in the range from 20 to 80%, preferably in the range from 30 to 70% and particularly preferably in the range from 40 to 60% of the carboxyl groups of the polymer as salt, particularly preferably as the sodium salt.
  • a methacrylic acid homopolymer is used, it is generally in the range from 5 to 60%, preferably in the range from 10 to 50% and particularly preferably in the range from 20 to 40% of the carboxyl groups of the polymer as salt, particularly preferably as the sodium salt.
  • the present invention also describes a fatliquor as described above, which is characterized in that a polymer according to (B) is a polyacrylic acid. Accordingly, the present invention also relates to a fatliquor, as described above, which is characterized in that the at least one polymer according to (B) is a polyacrylic acid with a molecular weight in the range from 2,500 to 150,000 g / mol.
  • polyacrylic acid mixtures are conceivable in which a polyacrylic acid has a molecular weight M w in the range from 2,500 to 70,000 g / mol or 5,000 to 50,000 g / mol or 10,000 to 25,000 g / mol and another polyacrylic acid has a molecular weight Mw in the range from 70,000 to 150,000 g / mol or 90,000 to 130,000 g / mol or 100,000 to 110,000 g / mol.
  • Mixtures of three or more polyacrylic acids with different molecular weights are also conceivable.
  • Mixtures of at least one acrylic acid homopolymer and at least one methacrylic acid homopolymer can also be used in the composition according to the invention, the individual different homopolymers each being able to have different molecular weights independently of one another.
  • copolymers of acrylic acid and methacrylic acid can also be used according to the invention.
  • acrylic acid or methacrylic acid other ethylenically unsaturated monomers such as itacenic acid, fumaric acid, maleic acid or their anhydrides can be used as comonomer. It is also possible to use suitable acidic or basic substituted acrylates or methacrylates. Terpolymers of acrylic acid, methacrylic acid and one of the other monomers mentioned above can also be used, for example.
  • the polymers are preferably used according to the invention as an aqueous solution or dispersion.
  • at least one polymer it is possible here for at least one polymer to be dissolved in the aqueous mixture and for at least one further polymer to be dispersed.
  • the aqueous solution or dispersion generally contains the polymer in a proportion in the range from 5 to 40% by weight, preferably in the range from 10 to 40% by weight, further preferably in the range from 20 to 40% by weight. and particularly preferably in the range from 25 to 35% by weight, based in each case on the total weight of the aqueous solution or the aqueous dispersion.
  • the aqueous solution or dispersion can contain at least one solubilizer or at least one further solvent or both at least one solubilizer or at least one further solvent.
  • solvents which may be mentioned are glycols, diethylene glycol, dipropylene glycol, butyl diglycol, hexylene glycol or oligoethylene glycols having 3 to 7 ethylene units being further preferred.
  • the alkylene oxide units are generally alkylene oxide units with at least 2 C atoms, preferably with 2 to 4 C atoms and particularly preferably with 2 to 3 C atoms. Ethylene oxide units are particularly preferred.
  • the alkylene oxide units of the respective polyether chains can be the same or different. In the latter case, the alkylene oxide units can be arranged randomly or in blocks or partially in blocks.
  • the alkoxylated alkanols or fatty alcohols used according to the invention are generally obtained from the reaction of the corresponding alkanols or from mixtures of two or more thereof or fatty alcohols or from mixtures of two or more thereof with the desired molar amounts of the alkylene oxides, such as ethylene oxide, propylene oxide or Obtain butylene oxide.
  • the alkylene oxides such as ethylene oxide, propylene oxide or Obtain butylene oxide.
  • statistical or block-like or both statistical and block-like polyether chains can be produced in a targeted manner.
  • Such reactions can be catalyzed, for example, by small amounts of water and / or additions of alkali.
  • the emulsifier compositions according to the invention are generally prepared by mixing the components with stirring and optionally with gentle heating, whereupon the finished emulsifier mixture is used to produce the greasing agent according to the invention.
  • the emulsifier composition can, if appropriate, be converted into a solution by adding water, for example preferably having a solids content in the range from about 40 to about 80% by weight based on the total weight of the emulsifier composition. Other concentrations of the emulsifier compositions are possible. This solution can then be used to produce the fatliquor according to the invention.
  • an alkoxylated with at least 15 alkylene oxide units C 12 - C ⁇ fatty alcohol mixture used to, on the one hand an alkoxylated with 15 to 30 alkylene oxide units C 12 - to C M fatty alcohol mixture and the other one with 40 contains up to 100 alkylene oxide units alkoxylated C 12 to C 24 fatty alcohol mixture.
  • the present invention also relates to a fatliquor, as described above, which is characterized in that it is used as component (C)
  • the present invention also describes the emulsifier composition itself containing
  • the emulsifier components according to (Ca) have an average of 8 to 17 C atoms, particularly preferably 10 to 17 C atoms and particularly preferably an average of 13 to 15 C atoms, and the emulsifier components according to (Cb ) and (Cc) independently of one another on average 14 to 20 carbon atoms, particularly preferably on average 16 to 18 carbon atoms.
  • Emulsifier compositions are further preferred in which component (Ca) averages 5 to 10 alkylene oxide units, component (Cb) averages 20 to 30 alkylene oxide units and component (Cc) averages 50 to 100 alkylene oxide units. point.
  • the emulsifier composition (C) generally contains the component (Ca) in a proportion in the range from 40 to 80% by weight, preferably in the range from 45 to 75% by weight and particularly preferably in the range from 50 to 70% by weight. %, each based on the total weight of the emulsifier composition.
  • the component (Cb) in the emulsifier composition (C) is generally in a proportion in the range from 10 to 50% by weight, preferably in the range from 10 to 40% by weight and particularly preferably in the range from 15 to 30% by weight. -%, each based on the total weight of the emulsifier composition.
  • Component (Cc) in the emulsifier composition (C) is generally in a proportion in the range from 10 to 50% by weight, preferably in the range from 10 to 40% by weight and particularly preferably in the range from 15 to 30% by weight. -%, each based on the total weight of the emulsifier composition.
  • the present invention also relates to a fatliquor, as described above, which is characterized in that the emulsifier composition according to (C) contains the component (Ca) in a proportion in the range from 40 to 80% by weight, the component (Cb) in in a proportion of 10 to 50% by weight and component (Cc) in a proportion of 10 to 50% by weight, in each case based on the weight of component (C).
  • the present invention therefore also describes the emulsifier composition itself containing (Ca) 50 to 70% by weight of a C 13 to C 12 alkanol alkoxylated with 5 to 10 alkylene oxide units or a mixture of two or more such alkanols and
  • the present invention also describes the use of the emulsifier composition as described above, and of component (Ca) or (Cb) or (Cc) or components (Ca) and (Cb) or components (Ca) and (Cb) or Components (Ca) and (Cc) or components (Ca) and (Cb) and (Cc) for the production of a fatliquor for the production and / or treatment of leather.
  • the present invention also generally describes the use of component (Ca) or (Cb) or (Cc) or components (Ca) and (Cb) or components (Ca) and (Cb) or components (Ca) and ( Cc) or the components (Ca) and (Cb) and (Cc) for the production and / or for the treatment of leather.
  • the fatliquoring agents according to the invention contain components (A), (B) and (C) in proportions in the range from 50 to 90% by weight with respect to component (A), in the range from 5 to 25% by weight with regard to Component (B) and in the range of 1 to 10% by weight with respect to component (C), the weight of component (B) being calculated as the weight of the aqueous solution or dispersion of the at least one polymer.
  • the present invention also relates to a fatliquor, as described above, which is characterized in that it contains component (A) in a proportion in the range from 50 to 90% by weight, component (B) in a proportion in Contains range of 5 to 25 wt .-% and component (C) in a proportion in the range of 1 to 10 wt .-%, the weight of component (B) as the weight of the aqueous solution or dispersion of the at least one polymer is expected.
  • the fatliquoring agents according to the invention contain components (A), (B) and (C) in proportions in the range from 55 to 85% by weight with respect to component (A), in the range from 10 to 25% by weight with regard to component (B) and in the range from 2 to 9% by weight with regard to component (C), the weight of component (B) being calculated as the weight of the aqueous solution or dispersion of the at least one polymer.
  • the fatliquoring agents according to the invention contain components (A), (B) and (C) in proportions in the range from 60 to 80% by weight with respect to component (A), in the range from 10 to 20% by weight. % with respect to component (B) and in the range from 3 to 8% by weight with respect to component (C), the weight of component (B) being calculated as the weight of the aqueous solution or dispersion of the at least one polymer.
  • the fatliquoring agents according to the invention can also contain other suitable constituents.
  • further fatliquors known from the prior art can be contained in the fatliquor according to the invention.
  • Additional emulsifiers and / or diluents, in particular water, may also be present.
  • glycols are preferably contained in the fatliquor, with diethylene glycol, dipropylene glycol, butyl diglycol, hexylene glycol or oligoethylene glycols having 3 to 7 ethylene units being further preferred.
  • the composition according to the invention contains dipropylene glycol.
  • a composition according to the invention contains the at least one further constituent mentioned, for example preferably the at least one glycol, preferably dipropylene glycol, in a proportion in the range from generally 1 to 20% by weight, preferably from 3 to 17% by weight. and particularly preferably from 5 to 15% by weight, in each case based on the total weight of the composition.
  • the at least one further constituent mentioned for example preferably the at least one glycol, preferably dipropylene glycol, in a proportion in the range from generally 1 to 20% by weight, preferably from 3 to 17% by weight. and particularly preferably from 5 to 15% by weight, in each case based on the total weight of the composition.
  • composition according to the invention can be produced according to all suitable methods.
  • the order in which the constituents contained in the composition according to the invention are combined is essentially as long as the processability is ensured.
  • mesophase for example, could occur in the production of the composition according to the invention, which could, for example, have a disadvantageous effect on the stirrability of the composition.
  • the at least one native lipoid is initially introduced, then the at least one polymer based on the monomers acrylic acid and or or methacrylic acid is added, and the emulsifier composition is then added. This can be followed, for example, by the addition of further solvent, for example to set the desired degree of dilution.
  • the emulsifier composition is not produced in a separate step and then added as such, but the constituents of the emulsifier composition are used individually and in succession to produce the fatliquoring agent according to the invention.
  • a modified, native oil and a native phospholipid are used as the at least one lipoid, it is particularly preferred to initially introduce the oil and then to add the phospholipid, further preferably the oil and the phospholipid at a temperature in the range from 40 to 50 ° C are mixed together.
  • the present invention further relates to the use of the fatliquors described above in the manufacture and / or treatment of leather.
  • the greasing agents according to the invention are used to soften leather, increase its fullness and strength and to protect it against moisture, dirt and external chemical influences.
  • the present invention also relates to the use of a fatliquor, as described above, in the manufacture or treatment or in the manufacture and treatment of leather and hides.
  • the fatliquoring agents according to the invention can be used undiluted or, for example, as an aqueous dispersion.
  • aqueous dispersions contain solids in a proportion in the range from 40 to 80% by weight, more preferably in the range from 50 to 80% by weight and in particular in the range from 60 to 75% by weight.
  • the present invention therefore also relates to a method for fatliquoring leather and skins, the leather or the skins being brought into contact with at least one aqueous dispersion, which is characterized in that the at least one aqueous dispersion contains a fatliquor as described above in one proportion contains from 40 to 80% by weight.
  • the fatliquor containing the above-mentioned components it is particularly preferred to produce the fatliquor containing the above-mentioned components as a highly concentrated product. In this way it is possible for the tanner to dilute and use the product according to his own ideas and specifications. For such concentrated fatliquor compositions, lower transportation costs are still incurred due to lower weight.
  • degrees of dilution in the range from, for example, 1: 4 to 1: 5 being preferred.
  • a degree of dilution of 1: 4 means that 4 parts by weight of solvent, for example preferably water, are used per part by weight of product.
  • the retanning was carried out by adding 100 parts by weight of water (all at 35 ° C.), then 2 parts by weight of high molecular weight polymer tanning agent (Relugan ® RE). After 15 min moving in the barrel 1 part by weight of synthetic auxiliary tanning agent (Tamol ® M) was added and incubated for another 15 minutes. emotional. Now 4 parts by weight of vegetable tanning agent (Mimosa) and 4 parts by weight of resin tanning agent (Relugan ® D and S) were added.
  • the greasing was then carried out by adding 100 parts by weight of water (60 ° C.) and 5 percent by weight of the greasing agent prepared according to Example 1 in a 1: 5 dilution with water. Then was drummed for 60 minutes in the barrel at 60 ° C, a further 100 parts by weight of water are added, drumming for 15 minutes, adjusted by addition of formic acid of pH 3.7 and fixed by adding a cationic fixative (Bastamol ® B) the fat. After draining the liquor and washing again with 200 parts by weight of water, the leather was dried (hanging drying), conditioned and stabled.
  • a cationic fixative Bastamol ® B
  • the leather obtained in this way was characterized by excellent softness and firmness of the grain, excellent fullness and a pleasant, velvety feel.
  • Example 4 was carried out analogously to Example 3, with the comparative fatliquor prepared according to Example 2 being used in the oiling step instead of the oiling agent according to the invention.
  • the leather thus obtained was characterized by only medium softness with poor grain strength and good fullness.
  • the pleasant, velvety feel of the leather described in Example 3 was also missing.

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

Abstract

Agent de mise en suif pour la fabrication et / ou le traitement de cuirs, qui contient (A) au moins un lipoïde natif, (B) au moins un polymère à base des monomères acide acrylique et / ou acide méthacrylique et (C) une composition émulsifiante contenant un alcanol C6 à C17 alcoxylé à l'aide d'unités oxyde d'alkylène au nombre de 12 au plus ou un mélange de deux de ces alcanols ou plus et un mélange d'acides gras C12 à C24 alcoxylé à l'aide d'unités oxyde d'alkylène au nombre de 15 au moins.
EP04731175A 2003-05-06 2004-05-05 Agent de mise en suif pour la fabrication et le traitement de cuirs Withdrawn EP1623047A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10320110A DE10320110A1 (de) 2003-05-06 2003-05-06 Fettungsmittel zur Herstellung und Behandlung von Leder
PCT/EP2004/004765 WO2004099449A1 (fr) 2003-05-06 2004-05-05 Agent de mise en suif pour la fabrication et le traitement de cuirs

Publications (1)

Publication Number Publication Date
EP1623047A1 true EP1623047A1 (fr) 2006-02-08

Family

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EP04731175A Withdrawn EP1623047A1 (fr) 2003-05-06 2004-05-05 Agent de mise en suif pour la fabrication et le traitement de cuirs

Country Status (6)

Country Link
US (1) US7300599B2 (fr)
EP (1) EP1623047A1 (fr)
CN (1) CN1802442A (fr)
BR (1) BRPI0410065A (fr)
DE (1) DE10320110A1 (fr)
WO (1) WO2004099449A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2008666C2 (en) 2012-04-20 2013-10-23 Stahl Int Bv Composition and process for the retanning and fatliquoring of leather, and the leather prepared.
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BRPI0410065A (pt) 2006-05-23
WO2004099449A1 (fr) 2004-11-18
US7300599B2 (en) 2007-11-27
DE10320110A1 (de) 2004-11-25
CN1802442A (zh) 2006-07-12

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