WO2018195234A1 - Procédé de conservation de peaux d'animaux ou de cuirs - Google Patents

Procédé de conservation de peaux d'animaux ou de cuirs Download PDF

Info

Publication number
WO2018195234A1
WO2018195234A1 PCT/US2018/028235 US2018028235W WO2018195234A1 WO 2018195234 A1 WO2018195234 A1 WO 2018195234A1 US 2018028235 W US2018028235 W US 2018028235W WO 2018195234 A1 WO2018195234 A1 WO 2018195234A1
Authority
WO
WIPO (PCT)
Prior art keywords
skins
hides
antimicrobial composition
zinc
pyrithione
Prior art date
Application number
PCT/US2018/028235
Other languages
English (en)
Inventor
Maria Regina Prioli
Michelle RIOUX
Mauricio Da Silva Franzim
Cleide Caldas COSTA
Original Assignee
Lonza Inc.
Arch Química Brasil Ltda
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 Lonza Inc., Arch Química Brasil Ltda filed Critical Lonza Inc.
Publication of WO2018195234A1 publication Critical patent/WO2018195234A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N1/00—Preservation of bodies of humans or animals, or parts thereof
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/02—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing liquids as carriers, diluents or solvents
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
    • A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • A01N59/16—Heavy metals; Compounds thereof
    • 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
    • C14C1/02—Curing raw hides
    • 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

  • raw/fresh animal hides and skins are first collected from a slaughterhouse.
  • the raw/fresh hides or skins are then stored and/or transported to a leather-making facility.
  • the hides and skins Prior to being processed into leather, the hides and skins can be stored for an amount of time of from hours to weeks.
  • the hides and skins are very susceptible to microbial degradation as their main constituent is protein. Consequently, raw hides and skins begin to rot almost immediately.
  • the oldest and most used preservation process is treatment of the rawhides with salt (sodium chloride) or brine.
  • salt sodium chloride
  • the salt reduces the water content of the hide from about 65% to 35 to 40% and thus provides a living atmosphere which is adverse to bacteria, so that bacteria growth is inhibited.
  • salt as a preservative is still widely used and cost effective, the use of salt does present problems.
  • the hide typically needs to be rehydrated prior to being processed into leather.
  • the salt is removed from the hide making the hide susceptible to microbial contamination. Attempting to protect the hides during rehydration has been problematic in that many biocides are incompatible or lose effectiveness when combined with the salt solution.
  • a need exists for an antimicrobial composition that can be used in conjunction with a salt preservative solution. [0007] A need also exists for an antimicrobial composition capable of completely replacing the use of salt solutions in order to preserve raw/fresh animal hides and skins.
  • the present disclosure is directed to an improved method for preserving fresh/raw hides and skins.
  • the present disclosure is also directed to an antimicrobial composition that can be used to preserve animal hides and skins.
  • the antimicrobial composition of the present disclosure can be used to preserve animal hides and skins during any step during the process of converting the animal hides and skins to another product, such as leather.
  • the following are representative processes during which the antimicrobial composition of the present disclosure may be utilized:
  • the antimicrobial composition of the present disclosure can be used to preserve fresh/raw hides and skins and can replace the use of conventional salt solutions;
  • the antimicrobial composition of the present disclosure can be used in conjunction with conventional salt solutions.
  • the antimicrobial composition can be combined with a salt solution to initially preserve fresh/raw hides and skins and can be used later during rehydration of the animal hides and skins;
  • the antimicrobial composition of the present disclosure can be used to treat animal hides and skins that have been previously preserved using a salt solution.
  • the dried animal hides and skins that have been treated with a salt solution are rehydrated by being soaked in an aqueous solution.
  • the antimicrobial composition of the present disclosure is added to the soaking solution in order to protect the animal hides and skins during removal of the salt solution and during rehydration of the product.
  • the present disclosure is directed to a method for preserving animal hides or skins by treating the hides or skins with an antimicrobial composition.
  • the hides or skins treated in accordance with the present disclosure comprise raw or fresh hides or skins, such as hides or skins that have not begun the tanning and/or leather process.
  • the antimicrobial composition can generally contain an antimicrobial agent, such as a pyrithione.
  • the antimicrobial composition can be initially formulated into a concentrate that is later diluted.
  • the animal skins or hides can be treated by being immersed in a bath containing the antimicrobial composition.
  • the animal hides or skins can be treated in any suitable manner, such as by spraying or other similar process.
  • the method includes treating the hides or skins with an antimicrobial composition that comprises a pyrithione, a zinc source, and an alkanolamine.
  • the zinc source refers to zinc, a zinc compound, or a zinc complex and is separate from the pyrithione.
  • the pyrithione for instance, may comprise a pyrithione salt such as sodium pyrithione.
  • the zinc source on the other hand, may comprise a zinc salt, a zinc alloy, a zinc complex, or mixtures thereof.
  • the zinc source comprises a zinc oxide, a zinc borate, a zinc hydroxide, a zinc sulfate, a zinc chloride, or combinations thereof.
  • any suitable alkanolamine can be contained within the antimicrobial composition.
  • the alkanolamine for instance, may comprise an ethanolamine, 1 -amino-2-propanol, 3-amino-1 -propanol, or mixtures thereof.
  • the antimicrobial composition may be formulated as a concentrate that is later diluted and used to treat the animal skins or hides.
  • the concentrate may contain from about 1 % to about 15% by weight pyrithione, from about 0.05% to about 5% by weight of the zinc source, and from about 40% to about 70% by weight of the alkanolamine.
  • the remainder, preferably from about 41 .05% to about 85% by weight, with the % by weight adding up to 100% by weight, of the concentrate may comprise water.
  • the antimicrobial composition is then diluted with water to provide a treating liquid prior to contact with the animal hides or skins, also other auxiliaries may be added in said dilution.
  • the above concentrate for instance, can be diluted such that said treating liquid contains the above antimicrobial concentrate composition in an amount greater than about 0.3 g/L, such as in an amount greater than about 0.7 g/L, such as in an amount greater than about 0.9 g/L.
  • the concentration of the antimicrobial composition in the resulting liquid can generally be less than about 70 g/L, such as less than about 50 g/L. Any of said upper limits can be combined with any of said lower limits.
  • the animal hides or skins are contacted with a liquid containing the antimicrobial composition.
  • the liquid may contain the pyrithione at a concentration of generally greater than about 3 ppm, such as greater than about 20 ppm, such as greater than about 30 ppm, such as greater than about 40 ppm, such as greater than about 50 ppm, such as greater than about 60 ppm, such as greater than about 70 ppm.
  • the pyrithione concentration contained in the liquid can generally be less than about 7000 ppm, such as less than about 5000 ppm, such as less than about 3000 ppm, such as less than about 1000 ppm, such as less than about 700 ppm, such as less than about 500 ppm.
  • ppm refers to ppm by weight. Any of said upper limits can be combined with any of said lower limits.
  • the pyrithione can be contained in the liquid in relation to the zinc source such that the weight ratio of the pyrithione to the zinc source can be from about 200: 1 to about 1 :5, such as from about 10: 1 to about 1 :1 .
  • the weight ratio of the pyrithione to the alkanolamine within the liquid can generally be from about 1 :2 to about 1 :70, such as from about 1 :3 to about 1 :20.
  • the liquid may further contain one or more surfactants and optionally water.
  • the surfactant may comprise a non-ionic surfactant, a cationic surfactant, and/or a zwitterionic surfactant.
  • Non-ionic surfactants may be preferred and include ethoxylated alcohols.
  • the liquid can contain a carbonate salt.
  • the carbonate salt for instance, may comprise sodium carbonate.
  • the above described antimicrobial composition can be used to preserve fresh animal hides or skins immediately after slaughter.
  • the preservative liquid can contain the antimicrobial composition alone or in conjunction with a salt solution, such as a sodium chloride solution.
  • the animal skins or hides are first treated with a preservative comprising a salt.
  • the salt may comprise sodium chloride.
  • the animal hides or skins can be stored.
  • the animal hides or skins can be stored for greater than about 24 hours, such as greater than about 48 hours.
  • the animal hides or skins can then be treated with the antimicrobial composition of the present disclosure.
  • the animal hides or skins can be treated with the antimicrobial composition by being immersed in a bath containing the antimicrobial composition.
  • the bath may contain water in conjunction with the antimicrobial composition for not only removing the salt solution but also in order to rehydrate the skins or hides.
  • the hides or skins can then be stored for a desired period of time prior to being processed into leather.
  • the antimicrobial composition of the present disclosure is well suited to protecting the hides or skins prior to further processing.
  • the present disclosure is directed to a method for preserving raw/fresh hides and skins. More particularly, the present disclosure is directed to chemical formulations and to a method for protecting animal hides and skins from microbial degradation after slaughter and during shipping and storage prior to producing leather goods.
  • the hides and skins are treated with an antimicrobial composition that contains a pyrithione, such as a pyrithione salt.
  • the antimicrobial composition may contain a zinc source and one or more alkanolamine amines.
  • the pyrithione which has antimicrobial properties, interacts synergistically with a water-soluble zinc component and the organic amine that results in the biocidal effect of the composition being greater than any of the components taken individually.
  • the antimicrobial composition may be used alone as a preservative agent for raw/fresh hides and skins
  • the antimicrobial composition has also been found to work well in conjunction with conventional preservatives, such as salt solutions.
  • the method of the present disclosure can preserve fresh hides and skins for greater than 48 hours and for much longer time periods.
  • the antimicrobial composition of the present disclosure can be used in numerous different ways in order to preserve the animal hides and skins.
  • the antimicrobial composition can be used in any step of the process of preserving the hides or skins prior to subjecting the hides or skins to the leather making process.
  • representative methods of using the antimicrobial composition include:
  • the antimicrobial composition of the present disclosure can be used to preserve fresh/raw hides and skins and can replace the use of conventional salt solutions;
  • the antimicrobial composition of the present disclosure can be in conjunction with conventional salt solutions.
  • the antimicrobial composition can be combined with a salt solution to initially preserve fresh/raw hides and skins and can be used later during rehydration of the animal hides and skins;
  • the antimicrobial composition of the present disclosure can be used to treat animal hides and skins that have been previously preserved using a salt solution.
  • the dried animal hides and skins that have been treated with a salt solution are rehydrated by being soaked in an aqueous solution.
  • the antimicrobial composition of the present disclosure is added to the soaking solution in order to protect the animal hides and skins during removal of the salt solution and during rehydration of the product.
  • the antimicrobial composition contains pyrithione.
  • Pyrithione is known by several names, including 2 mercaptopyridine-N-oxide; 2- pyridinethiol-1 -oxide (CAS Registry No. 1 121 -31 -9); 1 -hydroxypyridine-2-thione and 1 hydroxy-2(1 H)-pyridinethione (CAS Registry No. 1 121 -30-8).
  • Pyrithione salts are commercially available from Lonza, Inc.
  • the pyrithione can be present in a soluble form such as a water soluble form.
  • the pyrithione may comprise sodium pyrithione.
  • Other pyrithiones that may be present include generally any soluble compound, salt or complex.
  • a single pyrithione may be present in the composition or a combination of pyrithones may be included.
  • Zinc sources useful in the composition include, for example, zinc alloys, zinc salts, zinc oxides, zinc hydroxides, zinc sulfates, zinc chlorides, zinc borates, and combinations thereof.
  • Examples of zinc salts that may be used in the composition include zinc acetate, zinc oxide, zinc borate, zinc carbonate, zinc hydroxide, zinc chloride, zinc sulfate, zinc citrate, zinc fluoride, zinc iodide, zinc lactate, zinc oleate, zinc oxalate, zinc phosphate, zinc propionate, zinc salicylate, zinc selenate, zinc silicate, zinc stearate, zinc sulfide, zinc tannate, zinc tartrate, zinc valerate, and the like.
  • Combinations of zinc salts may also be used in the composition.
  • the zinc source and pyrithione are combined with an organic amine.
  • the organic amine component comprises one or more 1 ,2 and 1 ,3 alkanolamines encompassed by the formula 1 :
  • amine component is any soluble combination of one or more alkanolamines encompassed by Formula 1 with one or more alkanolamines encompassed by the formula 2:
  • amine component is any soluble combination of one or more amines encompassed by Formula 1 and one or more amines selected from monomers and polymers of alkyl diamines of the formula 3: R 1 R 2 N— [(CH 2 ) n — CH 2 — NH— ] m — H (Formula 3) where: n is 1 or 2, and m is about 1 to about 2000, and R 1 and R 2 are hydrogens or lower alkyl groups having a total number of carbons less than or equal to 4.
  • the antimicrobial composition comprises sodium pyrithione combined with zinc chloride and ethanolamine.
  • the amount and/or concentration of each component contained in the antimicrobial composition can vary depending upon the particular application and the desired result.
  • the antimicrobial composition may be formulated as a concentrate that is then diluted with water prior to treating the animal hides and skins.
  • the concentrate may comprise an aqueous solution containing the pyrithione in an amount of from about 1 % to about 15% by weight, such as from about 5% to about 10% by weight.
  • the zinc source on the other hand can be present in the concentrate in an amount from about 0.05% to about 5 % by weight, such as from about 1 % by weight to about 5% by weight.
  • the alkanolamine can be present in the concentrate generally in an amount from about 40% to about 70% by weight.
  • the remainder of the concentrate may comprise water.
  • the above concentrate of the antimicrobial solution can then be combined with water and/or other components for contact with the animal hides and skins.
  • the resulting diluted solution may contain the above concentrate in an amount greater than 0.3 g/L, such as in an amount greater than about 0.7 g/L, such as in an amount greater than 0.9 g/L, such as in an amount greater than 1 g/L.
  • the above described concentrate is generally contained in the diluted liquid in an amount less than about 70 g/L, such as in an amount less than about 50 g/L. Any of said upper limits can be combined with any of said lower limits.
  • the liquid used to treat the animal hides or skins can be formulated and used to treat the animal hides or skins without first forming a concentrate.
  • the liquid used to treat the animal hides or skins can contain the pyrithione, such as sodium pyrithione, in a concentration of generally greater than about 3 ppm, such as greater than about 20 ppm, such as greater than about 30 ppm, such as greater than about 40 ppm, such as greater than about 50 ppm, such as greater than about 60 ppm, such as greater than about 70 ppm, such as greater than about 80 ppm, such as greater than about 90 ppm, such as greater than about 100 ppm. Any of said upper limits can be combined with any of said lower limits.
  • the pyrithione can be present at higher concentrations, in general, the pyrithione is contained in the liquid at a
  • concentration of less than about 10,000 ppm such as less than about 7000 ppm, such as less than about 5000 ppm, such as less than about 3000 ppm, such as less than about 1000 ppm, such as less than about 700 ppm, such as less than about 500 ppm, such as less than about 250 ppm.
  • the pyrithione can be present in the liquid preservative in relation to the zinc source such that the weight ratio between the pyrithione and the zinc source is from about 200: 1 to about 1 :5.
  • the weight ratio between the pyrithione and the zinc source can generally be from about 100:1 to about 1 :4, such as from about 50: 1 to about 1 :3.
  • the weight ratio between the pyrithione and the zinc source is from about 10: 1 to about 1 : 1 , such as from about 5: 1 to about 2: 1 .
  • the weight ratio between the pyrithione and the organic amine or alkanolamine can also vary depending on those factors.
  • the weight ratio between the pyrithione and the alkanolamine can be from about 1 :2 to about 1 :70, such as from about 1 :3 to about 1 :20.
  • the zinc source can be present in the liquid preservative in an amount greater than about 0.001 g/L, such as in an amount greater than about 0.005 g/L, such as in an amount greater than about 0.01 g/L, such as in an amount greater than about 0.02 g/L, such as in an amount greater than about 0.03 g/L, such as in an amount greater than about 0.04 g/L, such as in an amount greater than about 0.1 g/L, such as in an amount greater than about 0.5 g/L, such as in an amount greater than about 1 g/L.
  • the zinc source concentration in the treating liquid in one embodiment, can generally be less than about 5 g/L, such as less than about 3.5 g/L, such as less than about 2.5 g/L, such as less than about 1 g/L.
  • the alkanolamine can be present in the treating liquid at a concentration generally greater than about 0.1 g/L, such as at a concentration of greater than about 0.2 g/L, such as at a concentration of greater than about 0.3 g/L, such as at a concentration of greater than about 0.5 g/L, such as at a concentration of greater than about 1 g/L, such as at a concentration of greater than about 10 g/L, such as at a concentration of greater than about 20 g/L.
  • the concentration of the alkanolamine is generally less than about 100 g/L, such as less than about 50 g/L, such as less than about 30 g/L, such as less than about 20 g/L. Any of said upper limits can be combined with any of said lower limits.
  • the hide or skin preservative composition may further contain various other ingredients.
  • the composition can contain one or more surfactants.
  • Surfactants that may be included in the antimicrobial composition include nonionic surfactants, cationic surfactants, zwitterionic surfactants, and mixtures thereof. In certain embodiments, the use of non-ionic surfactants may be preferred.
  • Non-limiting examples of surfactants include amine oxides, linear alcohol alkoxylates, secondary alcohol alkoxylates, alkoxylate ethers, betamines, and mixtures thereof.
  • Water soluble nonionic surfactants include the primary aliphatic alcohol ethoxylates, secondary aliphatic alcohol ethoxylates, alkylphenol ethoxylates and ethyiene-oxide-propylene oxide condensates of primary aikanois.
  • the nonionic synthetic organic surfactants generally are the condensation products of an organic aliphatic or alkyl aromatic hydrophobic compound and hydrophilic ethylene oxide groups. Practically any hydrophobic compound having a carboxy, hydroxy, amido, or amino group with a free hydrogen attached to the nitrogen can be condensed with ethylene oxide or with the poiyhydration product thereof, polyethylene glycol, to form a water-soluble nonionic surfactant.
  • the nonionic surfactant class includes the condensation products of a higher alcohol (e.g. , an alkanol containing about 8 to 18 carbon atoms in a straight or branched chain configuration) condensed with about 5 to 30 moles of ethylene oxide, for example, lauryl or myristyl alcohol condensed with about 5 to 20 moles of ethylene oxide (EO), tridecanol condensed with about 6 to moles of EO, myristyl alcohol condensed with about 10 moles of EO per mole of myristyl alcohol, the condensation product of EO with a cut of coconut fatty alcohol containing a mixture of fatty alcohols with alkyi chains varying from 10 to about 14 carbon atoms in length and wherein the condensate contains either about 6 moles of EO per mole of total alcohol or about 9 moles of EO per mole
  • a higher alcohol e.g. , an alkanol containing about 8 to 18 carbon atoms in a straight or branched
  • Additional satisfactory water soluble alcohol ethylene oxide condensates are the condensation products of a secondary aliphatic alcohol containing 8 to 18 carbon atoms in a straight or branched chain configuration condensed with 5 to 30 moles of ethylene oxide.
  • nonionic surfactants of the foregoing type are C11-C15 secondary alkanol condensed with either 9 EO or 12 EO.
  • nonionic surfactants include the polyethylene oxide condensates of one mole of alkyl phenol containing from about 8 to 18 carbon atoms in a straight- or branched chain alkyi group with about 5 to 30 moles of ethylene oxide.
  • alkyi phenol ethoxylates include nonyi phenol condensed with about 9.5 moles of EO per mole of nonyi phenol, dinonyl phenol condensed with about 12 moles of EO per mole of phenol, dinonyl phenol condensed with about 15 moles of EO per mole of phenol and di-isoctylphenol condensed with about 15 moles of EO per mole of phenol.
  • nonionic surfactants are the water-soluble condensation products of a Cs-Cso alkanol with a heteric mixture of ethylene oxide and propylene oxide wherein the weight ratio of ethylene oxide to propylene oxide is from 2.5:1 to 4: 1 , preferably 2.8: 1 to 3.3: 1 , with the total of the ethylene oxide and propylene oxide (including the terminal ethanol or propanol group) being from 60 to 85%, preferably 70 to 80%, by weight.
  • a particularly preferred surfactant is a C10-C16 alkanol condensate with ethylene oxide and propylene oxide, the weight ratio of ethylene oxide to propylene oxide being 3:1 and the total alkoxy content being about 75% by weight.
  • Condensates of 2 to 30 moies of ethylene oxide with sorbitan mono- and tri-C-io-Cao aikanoic acid esters having a HLB of 8 to 15 also may be employed as the nonionic surfactant in the described composition.
  • Suitable surfactants include polyoxyethylene (4) sorbitan monolaurate, polyoxyethyiene (4) sorbitan
  • the molecular weight of the hydrophobic portion of the molecule is of the order of 950 to 4000 and preferably 200 to 2,500,
  • the hydrophobic portion tends to increase the solubility of the molecule as a whole so as to make the surfactant water-soluble.
  • the molecular weight of the block polymers varies from 1 ,000 to 15,000 and the polyethylene oxide content may comprise 20% to 80% by weight.
  • the surfactant can be present in the liquid in an amount greater than about 0.01 % by weight, such as in an amount greater than about 0.05% by weight, such as in an amount greater than about 0.1 % by weight, such as in an amount greater than about 0.2% by weight.
  • the one or more surfactants are generally present in an amount less than about 20% by weight, such as an amount less than about 15% by weight, such as in an amount less than about 10% by weight, such as in an amount less than about 5% by weight, such as in an amount less than about 3% by weight, such as in an amount less than about 1 % by weight. Any of said upper limits can be combined with any of said lower limits.
  • the preservation composition or liquid of the present disclosure can also contain various other components.
  • the preservation composition may contain a carbonate, such as sodium carbonate.
  • Sodium carbonate can be present in the preservation composition generally in an amount greater than about 0.1 % by weight, such as greater than an amount 0.3% by weight.
  • the carbonate is generally present in an amount less than about 10% by weight, such as in an amount less than about 5% by weight, such as in an amount less than about 2% by weight, such as in an amount iess than about 1 % by weight. Any of said upper limits can be combined with any of said lower limits.
  • the manner in which the antimicrobial composition is applied to the hides or skins can vary depending upon the particular application.
  • treatment of the hides or skins can be accomplished by any suitable method such as dipping, soaking, brushing, pressure treating, spraying, or the like.
  • the antimicrobial composition may be contained in a liquid bath.
  • the hides or skins can be immersed within the bath and treated with the composition.
  • the antimicrobial composition of the present disclosure can be used to preserve the skins and hides at any step during the process of producing leather.
  • the antimicrobial composition can be used to treat the hides or skins immediately after slaughter.
  • the freshly slaughtered hides or skins can be dipped in a liquid bath containing the antimicrobial composition or the antimicrobial composition can be sprayed onto the skins or hides.
  • the antimicrobial composition of the present disclosure can be incorporated into a salt solution in order to preserve the freshly slaughtered skins or hides.
  • the salt solution may comprise a sodium chloride solution.
  • the antimicrobial composition is compatible with conventionally used preservatives, such as salts.
  • a liquid containing the antimicrobial composition and a salt solution can be contacted with the freshly slaughtered skins or hides.
  • the freshly slaughtered skins or hides can be dipped into a bath containing the salt solution in combination with the antimicrobial composition.
  • the antimicrobial composition of the present disclosure can also be used to treat skins or hides that were previously treated with a preservative and stored.
  • the hides or skins can be first treated with a salt solution containing any suitable salt, such as sodium chloride. After being treated with the salt solution, the animal hides or skins can be dried and stored for a desired amount of time. The salt solution can be used as an initial preservative for the skins or hides. After a period of time, the treated skins and hides can then be contacted with the antimicrobial composition of the present disclosure.
  • the animal skins or hides can be stored for over 24 hours, such as over 48 hours prior to being contacted with the antimicrobial composition containing the pyrithione, the zinc source and the alkanolamine.
  • the skins or hides can contain little to no water.
  • the skins or hides typically undergo a rehydration process.
  • the skins or hides are soaked in an aqueous solution.
  • the aqueous solution may contain a surfactant and/or a carbonate salt.
  • the hides are typically soaked in the aqueous solution of from about 2 hours to about 16 hours, such as from about 7 hours to about 10 hours.
  • the salt is drawn out of the skins or hides and the skins or hides absorb water. Once the salt is removed from the skins or hides, the hides and skins become susceptible to microbial degradation.
  • the antimicrobial composition of the present disclosure can be added to the soaking liquid in order to protect the skins or hides prior to leather processing.
  • the skins or hides can be further stored in a preserved state for a substantial period of time prior to being processed into leather.
  • the preservative composition of the present disclosure is capable of preserving animal hides or skins for greater than about 24 hours, such as greater than about 48 hours, such as greater than about 1 week.
  • fresh hides obtained shortly after slaughter were treated with a sodium chloride solution and stored for approximately 1 month prior to testing.
  • the dried hides were then rehydrated by first being placed in dirt soak followed by a main soak.
  • the salted hides were quartered and first subjected to the dirt soak.
  • the dirt soak contained 200% by weight of water based on the weight of the hides and 0.25% by weight of a non-ionic surfactant based on the weight of water.
  • the hides were soaked in the composition for 1 hour at 4 rpm. The soak was then drained.
  • the rawhides were subjected to the main soak.
  • the main soak contained 200% by weight of water based on the weight of the hides, 0.25% by weight of a non-ionic surfactant based on the weight of the water, 0.5% by weight sodium carbonate based on the weight of the water, and one or more of the antimicrobial formulations described below.
  • the hides were contacted with the above liquid for 4 hours at 4 rpm.
  • the % given in the sample key are % by weight based on the total weight of the Biocide Concentrate.
  • the hair slip analysis techniques used both visual and physical assessments to evaluate hair looseness.
  • the assessment involves the gentle pulling action of hair across different areas of the hide/sample, as well as a visual assessment of hair loss. Hair slip analysis was conducted at the end of the main soaking procedures.
  • Samples were analyzed via light microscopy techniques.
  • Samples were plated via pour plate technigues using tryptone soy agar (TSA) as the growth medium.
  • TSA tryptone soy agar
  • Toxicology testing was conducted on float water after the main soak.
  • the location of the hair slip is limited to the flank regions of the hide quarters and not present across the majority of the hide or the sampling regions. The location suggests that insufficient curing at the extremities could be the cause of the limited hair slip observed. It is possible that the initial salt preservation of the hides, the outer regions (flanks) were exposed to limited/reduced contact with the salt (NaCI). During the storage process, bacteria putrefaction as a result of inadequate salt curing could have resulted in the early stages of hair loosening.
  • microbiological results suggest that in all cases the bacteria counts are lower for stomached hide samples, in comparison to the float water samples.
  • BOD is a measurement of the amount of dissolved oxygen required for aerobic biological organisms to break down organic material present in the sample. The results obtained from BOD testing suggest that Samples 5 to 8 have lower BOD values.
  • COD tests to indirectly measure the amount of organic compounds in water, and is useful for assessing water quality by measuring the amounts of organic pollutants.
  • the results obtained from COD testing correlate with those obtained in BOD testing, thereby suggesting that Samples 5 to 8 have the lowest COD values.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Plant Pathology (AREA)
  • Pest Control & Pesticides (AREA)
  • Agronomy & Crop Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Toxicology (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Treatment And Processing Of Natural Fur Or Leather (AREA)

Abstract

La présente invention concerne un procédé de conservation de peaux animales et de cuirs bruts/frais. Dans un mode de réalisation, les cuirs et les peaux sont traités avec une composition antimicrobienne contenant une pyrithione, une source de zinc et une amine organique, telle qu'une alcanolamine.
PCT/US2018/028235 2017-04-21 2018-04-19 Procédé de conservation de peaux d'animaux ou de cuirs WO2018195234A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762488108P 2017-04-21 2017-04-21
US62/488,108 2017-04-21

Publications (1)

Publication Number Publication Date
WO2018195234A1 true WO2018195234A1 (fr) 2018-10-25

Family

ID=63856107

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2018/028235 WO2018195234A1 (fr) 2017-04-21 2018-04-19 Procédé de conservation de peaux d'animaux ou de cuirs

Country Status (2)

Country Link
AR (1) AR111613A1 (fr)
WO (1) WO2018195234A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220333217A1 (en) * 2021-04-19 2022-10-20 Fujian Agriculture And Forestry University Leather tanning method using chrome-free and formaldehyde-free adhesive

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4224028A (en) * 1978-11-20 1980-09-23 Thiele Geraldine H Retardation of the putrefaction of hides and skins
US20010001479A1 (en) * 1996-01-18 2001-05-24 Dana J. Johnson Hide-curing additive
US20050158263A1 (en) * 1999-06-25 2005-07-21 Arch Chemicals, Inc., A Corporation Of The State Of Virginia Pyrithione biocides enhanced by zinc metal ions and organic amines
US20050214464A1 (en) * 2002-05-02 2005-09-29 Takashi Moriyoshi Material such as hide, skin, leather or fur for use in manufacturing leather product, leather product, method for preparing said material, and method for manufacturing leather product
US20150361514A1 (en) * 2014-06-17 2015-12-17 The United States Of America, As Represented By The Secretary Of Agriculture Methods For Preserving Untanned Animal Hides

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4224028A (en) * 1978-11-20 1980-09-23 Thiele Geraldine H Retardation of the putrefaction of hides and skins
US20010001479A1 (en) * 1996-01-18 2001-05-24 Dana J. Johnson Hide-curing additive
US20050158263A1 (en) * 1999-06-25 2005-07-21 Arch Chemicals, Inc., A Corporation Of The State Of Virginia Pyrithione biocides enhanced by zinc metal ions and organic amines
US20050214464A1 (en) * 2002-05-02 2005-09-29 Takashi Moriyoshi Material such as hide, skin, leather or fur for use in manufacturing leather product, leather product, method for preparing said material, and method for manufacturing leather product
US20150361514A1 (en) * 2014-06-17 2015-12-17 The United States Of America, As Represented By The Secretary Of Agriculture Methods For Preserving Untanned Animal Hides

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220333217A1 (en) * 2021-04-19 2022-10-20 Fujian Agriculture And Forestry University Leather tanning method using chrome-free and formaldehyde-free adhesive
US11732316B2 (en) * 2021-04-19 2023-08-22 Fujian Agriculture And Forestry University Leather tanning method using chrome-free and formaldehyde-free adhesive

Also Published As

Publication number Publication date
AR111613A1 (es) 2019-07-31

Similar Documents

Publication Publication Date Title
US6572788B2 (en) Amine oxide wood preservatives
RU2411119C2 (ru) Способ обработки древесины
AU2001274927A1 (en) Amine oxide wood preservatives
WO2018195234A1 (fr) Procédé de conservation de peaux d'animaux ou de cuirs
JP2011506444A (ja) 処理された木製品から水溶性金属殺生物剤の浸出を減らす方法
US4915909A (en) Method of controlling algae growth
AU2021202466A1 (en) Methods for improved copper penetration in wood
MX2007000500A (es) Composicion conservadora de madera.
AU2006266328B2 (en) Wood preservative composition
AU2005312113A1 (en) Method of protecting an animal skin product from metalloproteinase activity
CA2269066C (fr) Procede de conservation de peaux d'animaux
Lindner et al. Preservation in the tannery
Moniharapon et al. The effect of gradual salt soaking and atung (Parinarium glaberimum, Hassk) on the yield and quality of dry salted bony flying fish (Cypselurus oxycephalus)
Crawford et al. Evaluation of wood treated with copper-based preservatives for Cu loss during exposure to heat and copper-tolerant Bacillus licheniformis
Fontoura et al. Performance of antimicrobial agents for the preservation of chrome leather
KR20050082946A (ko) 목재 방부ㆍ방미를 위한 목재 보존제 조성물
US3555159A (en) Antimicrobial composition and method of use
US3920388A (en) Composition for preventing deterioration of hides from freshly slaughtered animals
US3832130A (en) Method and composition for preventing deterioration of hides from freshly slaughtered animals
WO2017077464A1 (fr) Procédés de conservation des peaux animales et cuirs
JPS5896003A (ja) モノ−およびジブロモジシアノメタンをる用いる有害生物防除方法および有害生物防除のための該化合物を含有する組成物
JP3369544B2 (ja) 海苔処理剤および処理方法
RU2442327C2 (ru) Способ защиты материалов от микробного разрушения
Sarker et al. Preservation of Bovine Hide using Less Salt with Low Concentration of Antiseptic
RU2380221C2 (ru) Средство защиты древесины от биопоражения

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18788615

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 05/02/2020)

122 Ep: pct application non-entry in european phase

Ref document number: 18788615

Country of ref document: EP

Kind code of ref document: A1