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EP1981551A2 - Compositions absorbant l'eau et inhibitrices des odeurs - Google Patents

Compositions absorbant l'eau et inhibitrices des odeurs

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Publication number
EP1981551A2
EP1981551A2 EP07703780A EP07703780A EP1981551A2 EP 1981551 A2 EP1981551 A2 EP 1981551A2 EP 07703780 A EP07703780 A EP 07703780A EP 07703780 A EP07703780 A EP 07703780A EP 1981551 A2 EP1981551 A2 EP 1981551A2
Authority
EP
European Patent Office
Prior art keywords
water
absorbing polymer
urease inhibitor
polymer
composition
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.)
Withdrawn
Application number
EP07703780A
Other languages
German (de)
English (en)
Inventor
Volker Braig
Michael Marco
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Priority to EP07703780A priority Critical patent/EP1981551A2/fr
Publication of EP1981551A2 publication Critical patent/EP1981551A2/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/46—Deodorants or malodour counteractants, e.g. to inhibit the formation of ammonia or bacteria
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
    • A61L2300/40—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a specific therapeutic activity or mode of action
    • A61L2300/432—Inhibitors, antagonists
    • A61L2300/434—Inhibitors, antagonists of enzymes

Definitions

  • the present invention relates to odor-preventing water-absorbing compositions comprising at least one water-absorbing polymer and at least one urease inhibitor, to processes for their preparation and to hygiene articles and their preparation.
  • Water-absorbing polymers are, in particular, polymers of (co) polymerized hydrophilic monomers, graft (co) polymers of one or more hydrophilic monomers on a suitable graft base, crosslinked cellulose or starch ethers, crosslinked carboxymethylcellulose, partially crosslinked polyalkylene oxide or natural products swellable in aqueous liquids, such as guar derivatives, with water-absorbing polymers based on partially neutralized acrylic acid being preferred.
  • Such polymers are used as aqueous solution-absorbing products for making diapers, tampons, sanitary napkins, incontinence products and other sanitary articles, but also as water-retaining agents in agricultural horticulture.
  • Hygiene products may cause unpleasant odors during use, such as decomposition of urea.
  • WO-A-98/26808 WO-A-03/053486, JP-A-2001/258934, EP-A-0 739 635 and EP-A-1 034 800 and various solutions to the problem are proposed.
  • WO-A-98/26808 describes absorbent compositions containing any liquid absorbents, odor absorbents and one or more of biocides, urease inhibitors and pH regulators.
  • Crosslinked polyacylic acids having a degree of neutralization of at least 75 ⁇ mol% are mentioned as preferred absorbents for liquids.
  • WO-A-03/053486 discloses the use of Yucca extract as a urease inhibitor.
  • J PA-2001/258934 teaches the use of weakly acidic water-absorbing polymers having a degree of neutralization of 40 to 65 mol% in combination with urease inhibitors. J PA-2001/258934 contains no reference to the disproportionate case of absorption capacity when using more than 0.1 wt .-% of the urease inhibitor.
  • EP-A-0 739 635 describes absorbent compositions containing boric acid salts.
  • EP-A-1 034 800 describes the use of combinations of odor binder and oxidizer to avoid unpleasant odors
  • the object of the present invention was to provide improved water-absorbing compositions which reliably prevent unpleasant odors after being loaded with urine or other body fluids.
  • Another object of the present invention was to provide odor-inhibiting water-absorbing compositions which are storage stable, i. the compositions should neither discolor on prolonged storage nor lose their odor-preventing effect.
  • compositions comprising at least one water-absorbing polymer and at least one urease inhibitor, wherein the polymer is an acid group-carrying polymer whose acid groups are neutralized to 50 to 65 mol%, and the content of urease Inhibitor from 0.0001 to 0.1 wt .-%, based on the composition.
  • the acid groups of the water-absorbing polymer are preferably neutralized to 52 to 63 mol%, more preferably 54 to 61 mol%, most preferably 55 to 60 mol%.
  • composition according to the invention usually contains at least 90% by weight, preferably at least 95% by weight, particularly preferably at least 99% by weight, of the at least one water-absorbing polymer.
  • the at least one water-absorbing polymer is preferably a polymer based on a crosslinked acrylic acid.
  • the at least one water-absorbing polymer is preferably present in the form of surface-postcrosslinked particles.
  • the water-absorbing polymers are obtained, for example, by polymerization of a monomer solution containing
  • Suitable monomers a) are, for example, ethylenically unsaturated carboxylic acids, such as acrylic acid, methacrylic acid, maleic acid, fumaric acid and itaconic acid, or derivatives thereof, such as acrylamide, methacrylamide, acrylic esters and methacrylic acid esters. Particularly preferred monomers are acrylic acid and methacrylic acid. Very particular preference is given to acrylic acid.
  • hydroquinone half ethers are hydroquinone monomethyl ether (MEHQ) and / or tocopherols.
  • Tocopherol is understood as meaning compounds of the following formula
  • R 1 is hydrogen or methyl
  • R 2 is hydrogen or methyl
  • R 3 is hydrogen or methyl
  • R 4 is hydrogen or an acid radical having 1 to 20 carbon atoms.
  • Preferred radicals for R 4 are acetyl, ascorbyl, succinyl, nicotinyl and other physiologically acceptable carboxylic acids.
  • the carboxylic acids can be mono-, di- or tricarboxylic acids.
  • R 1 is particularly preferably hydrogen or acetyl. Especially preferred is RRR-alpha-tocopherol.
  • the monomer solution preferably contains at most 130 ppm by weight, more preferably at most 70 ppm by weight, preferably at least 10 ppm by weight, more preferably at least 30 ppm by weight, in particular by 50 ppm by weight, hydroquinone, in each case based on Acrylic acid, wherein acrylic acid salts are taken into account as acrylic acid become.
  • an acrylic acid having a corresponding content of hydroquinone half-ether can be used.
  • the crosslinkers b) are compounds having at least two polymerizable groups which can be incorporated in the polymer network by free-radical polymerization.
  • Suitable crosslinkers b) are, for example, ethylene glycol dimethacrylate, diethylene glycol diacrylate, allyl methacrylate, trimethylolpropane triacrylate, triallylamine, tetraallyloxyethane, as described in EP-A-0 530 438, di- and triacrylates, as in EP-AO 547 847, EP-A-0 559 476, EP-AO 632 068, WO-A-93/21237, WO-A-03/104299, WO-A-03/104300, WO-A-03/104301 and DE-A-103 31 450, mixed acrylates which, in addition to acrylic lat groups contain further ethylenically unsaturated groups, as described in DE-A-103 31 456 and WO-A-04/013064, or crosslinker
  • Suitable crosslinkers b) are especially N, N'-methylenebisacrylamide and N 1 N'-methylenebismethacrylamide, esters of unsaturated mono- or polycarboxylic acids of polyols, such as diacrylate or triacrylate, for example butanediol or ethylene glycol di acrylate or methacrylate, and trimethylolpropane triacrylate and allyl compounds, such as allyl (meth) acrylate, triallyl cyanurate, maleic acid diallyl esters, polyallyl esters, tetraallyloxyethane, triallylamine, tetraallylethylenediamine, allyl esters of phosphoric acid and vinylphosphonic acid derivatives, as described, for example, in EP-A-0 343 427.
  • esters of unsaturated mono- or polycarboxylic acids of polyols such as diacrylate or triacrylate, for example butanediol or ethylene glycol di acrylate
  • crosslinkers b) are pentaerythritol di-, pentaerythritol tri- and pentaerythritol tetraallyl ethers, polyethylene glycol diallyl ether, ethylene glycol diallyl ether, glycerol di- and glycerol triallyl ether, polyallyl ethers based on sorbitol, and ethoxylated variants thereof.
  • Useful in the process according to the invention are di (meth) acrylates of polyethylene glycols, wherein the polyethylene glycol used has a molecular weight between 300 and 1000.
  • crosslinkers b) are di- and triacrylates of 3 to 15 times ethoxylated glycerol, 3 to 15 times ethoxylated trimethylolpropane, 3 to 15 times ethoxylated trimethylolethane, in particular di- and triacrylates of 2 to 6-fold ethoxylated glycerol or trimethylolpropane, the 3-fold propoxylated glycerol or trimethylolpropane, and the 3-fold mixed ethoxylated or propoxylated glycerol or trimethylolpropane, the 15-fold ethoxylated glycerol or
  • Trimethylolpropans as well as the 40-fold ethoxylated glycerol, trimethylolethane or trimethylolpropane.
  • Very particularly preferred crosslinkers b) are the polyethoxylated and / or propoxylated glycerols esterified with acrylic acid or methacrylic acid to form di- or triacrylates, as described, for example, in WO-A-03/104301. Particularly advantageous are di- and / or triacrylates of 3- to 10-fold ethoxylated glycerol. Very particular preference is given to diacrylates or triacrylates of 1 to 5 times ethoxylated and / or propoxylated glycerol. Most preferred are the triacrylates of 3 to 5 times ethoxylated and / or propoxylated glycerin.
  • the amount of crosslinker b) is preferably at least 0.001 mol%, more preferably at least 0.005 mol%, very particularly preferably at least 0.01 mol%, and preferably up to 10 mol%, particularly preferably up to 5 mol% , very particularly preferably up to 2 mol%, in each case based on the monomer a).
  • Examples of ethylenically unsaturated monomers c) copolymerizable with the monomers a) are acrylamide, methacrylamide, crotonamide, dimethylaminoethyl methacrylate, dimethylaminoethyl acrylate, dimethylaminopropyl acrylate, diethylaminopropyl acrylate, dimethylaminobutyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, dimethylaminoneopentyl acrylate and dimethylaminoneopentyl methacrylate.
  • water-soluble polymers d) it is possible to use polyvinyl alcohol, polyvinylpyrrolidone, starch, starch derivatives, polyglycols or polyacrylic acids, preferably polyvinyl alcohol and starch.
  • the preferred polymerization inhibitors require dissolved oxygen for optimum performance.
  • the polymerization inhibitors may be prepared by inerting, i. Flow through with an inert gas, preferably nitrogen, to be freed of dissolved oxygen.
  • an inert gas preferably nitrogen
  • the oxygen content of the monomer solution before polymerization is reduced to less than 1 ppm by weight, more preferably less than 0.5 ppm by weight.
  • Water-absorbing polymers are usually obtained by polymerization of an aqueous monomer solution and optionally subsequent comminution of the hydrogel. Suitable preparation methods are described in the literature. Water-absorbing polymers can be obtained, for example Gel polymerization in a batch process or tubular reactor and subsequent comminution in a meat grinder, extruder or kneader (EP-AO 445 619, DE-A-19 846 413)
  • Emulsion polymerization in which bead polymers of relatively narrow gel size distribution are already obtained (EP-A-0 457 660).
  • reaction is preferably carried out in a kneader, such as in WO-A-
  • the acid groups of the hydrogels obtained are neutralized to 50 to 65 mol%, preferably to 52 to 63 mol%, preferably to 54 to 61 mol%, particularly preferably to 55 to 60 mol%, using the usual neutralizing agents may, preferably alkali metal hydroxides, alkali metal oxides, alkali metal carbonates or alkali metal hydrogencarbonates and mixtures thereof. Instead of alkali metal salts and ammonium salts can be used. Sodium and potassium are particularly preferred as alkali metals, but most preferably sodium hydroxide, sodium carbonate or sodium bicarbonate and mixtures thereof.
  • the neutralization is achieved by mixing the neutralizing agent as an aqueous solution or preferably as a solid.
  • sodium hydroxide with a water content well below 50 wt .-% may be present as a waxy mass with a melting point above 23 ° C. In this case, a dosage as general cargo or melt at elevated temperature is possible.
  • the neutralization can be carried out after the polymerization at the hydrogel stage. However, it is also possible to neutralize up to 40 mol%, preferably 10 to 30 mol%, particularly preferably 15 to 25 mol%, of the acid groups prior to the polymerization by adding a part of the neutralizing agent to the monomer solution and the desired final degree of neutralization is adjusted after the polymerization at the level of the hydrogel.
  • the monomer solution can be neutralized by mixing in the neutralizing agent.
  • the hydrogel can be mechanically comminuted, for example by means of a meat grinder, wherein the neutralizing agent can be sprayed, sprinkled or poured on and then thoroughly mixed. For this purpose, the resulting gel mass can be added several times to the homoge- be wound. Neutralization of the monomer solution to the final neutralization level is preferred.
  • the neutralized hydrogel is then dried with a belt or roller dryer until the residual moisture content is preferably below 15% by weight, in particular below 10% by weight, the water content being in accordance with that recommended by EDANA (European Disposables and Nonwovens Association) Test Method No. 430.2-02 "Moisture content" is determined.
  • a fluidized bed dryer or a heated ploughshare mixer can be used for drying.
  • the dryer temperature must be optimized, the air supply and removal must be controlled, and it is in any case to ensure adequate ventilation.
  • the drying is naturally simpler and the product is the whiter, if the solids content of the gel is as high as possible.
  • the solids content of the gel is preferably before
  • Drying therefore between 30 and 80 wt .-%.
  • Particularly advantageous is the ventilation of the dryer with nitrogen or other non-oxidizing inert gas.
  • sufficient aeration and removal of the water vapor will lead to an even more acceptable product.
  • Advantageous in terms of color and product quality is usually the shortest possible drying time.
  • the dried hydrogel is preferably ground and sieved, it usually being possible to use roller mills, pin mills or vibratory mills for milling.
  • the particle size of the screened, dry hydrogel is preferably below 1000 .mu.m, more preferably below 900 .mu.m, most preferably below 850 .mu.m, and preferably above 80 .mu.m, more preferably above 90 .mu.m, most preferably above 100 .mu.m.
  • particle size (sieve cut) of 106 to 850 ⁇ m.
  • the particle size is determined according to the test method No. 420.2-02 "Particle size distribution" recommended by the EDANA (European Disposables and Nonwovens Association).
  • Suitable postcrosslinkers for this purpose are compounds which contain at least two groups which can form covalent bonds with the carboxylate groups of the hydrogel.
  • Suitable compounds are, for example, alkoxysilyl compounds, polyaziridines, polyamines, polyamidoamines, di- or polyepoxides, as described in EP-AO 083 022, EP-A-543 303 and EP-A-937 736, di- or polyfunctional alcohols, as in DE-C-33 14 019, DE-C-35 23 617 and EP-A-450 922. ben, or ß-hydroxyalkylamides, as described in DE-A-102 04 938 and US-6,239,230.
  • DE-A-40 20 780 cyclic carbonates, in DE-A-198 07 502 2- oxazolidone and its derivatives, such as 2-hydroxyethyl-2-oxazolidone, in DE-A-198 07 992 bis- and poly 2-oxazolidinone, in DE-A-198 54 573 2-oxotetrahydro-1,3-oxazine and its derivatives, in DE-A-198 54 574 N-acyl-2-oxazolidones, in DE-A-102 04 937 cyclic ureas, in DE-A-103 34 584 bicyclic amide acetals, in EP-A-1 199 327 oxetanes and cyclic ureas and in WO-A-03/031482 morpholine-2,3-dione and its derivatives are described as suitable surface postcrosslinkers.
  • polyvalent cations in addition to the surface postcrosslinkers for surface postcrosslinking.
  • the usable polyvalent cations are, for example, divalent cations, such as the cations of zinc, magnesium, calcium and strontium, trivalent cations, such as the cations of aluminum, iron, chromium, rare earths and manganese, tetravalent cations, such as the cations of titanium and zirconium.
  • chloride, bromide, sulfate, hydrogen sulfate, carbonate, hydrogen carbonate, nitrate, phosphate, hydrogen phosphate, dihydrogen phosphate and carboxylate, such as acetate and lactate are possible.
  • Aluminum sulfate is preferred.
  • the postcrosslinking is usually carried out so that a solution of the surface postcrosslinker is sprayed onto the hydrogel or the dry polymer powder.
  • surface postcrosslinker and polyvalent cation can be sprayed in a common solution or as separate solutions.
  • the polymer powder is thermally dried, whereby the crosslinking reaction can take place both before and during drying.
  • the spraying of a solution of the crosslinker is preferably carried out in mixers with agitated mixing tools, such as screw mixers, paddle mixers, disk mixers, plowshare mixers and paddle mixers.
  • agitated mixing tools such as screw mixers, paddle mixers, disk mixers, plowshare mixers and paddle mixers.
  • Vertical mixers are particularly preferred, plowshare mixers and paddle mixers are very particularly preferred.
  • Suitable mixers are, for example, Lödige® mixers, Bepex® mixers, Nauta® mixers, Processall® mixers and Schugi® mixers. Very particular preference is given to using high-speed mixers, for example of the Schuggi-Flexomix® or Turbolizer® type.
  • the thermal drying is preferably carried out in contact dryers, more preferably paddle dryers, very particularly preferably disk dryers.
  • Suitable dryers are, for example, Bepex® T rockner and Nara® T rockner.
  • fluidized-bed dryers can also be used.
  • the drying can take place in the mixer itself, by heating the jacket or blowing hot air.
  • a downstream dryer such as a hopper dryer, a rotary kiln or a heatable screw.
  • Preferred drying temperatures are in the range 50 to 250 ° C, preferably at 50 to 200 ° C, and particularly preferably at 50 to 150 ° C.
  • the preferred residence time at this temperature in the reaction mixer or dryer is less than 30 minutes, more preferably less than 10 minutes.
  • Suitable urease inhibitors are 2-bromo-2-nitro-1,3-propanediol (bronopol), triclosan, substituted thiophosphoric triamides, boric acid and its derivatives, hydroxamic acid derivatives, cystamine and its derivatives, dicumerol and its derivatives, hydroquinone and its derivatives, fluorides, N-alkyl ureas, N-aryl ureas, 5-methoxy-2 - [[(4-methoxy-3,5-dimethyl-2-pyridinyl) methyl] sulfinyl] -1 H-benzimidazole (omeprazole), oxalic dihydrazide , Polyvinylpyrrolidone-iodine, organic halogen compounds, preferably iodides and bromides, complexing reagents, heavy metal ions, phosphates and polyphosphates.
  • bronopol 2-bromo-2-nitro-1,3-propane
  • Suitable urease inhibitors are also described in J. Enz. Vol. 16 (2001), pages 507 to 516, J. Am. Chem. Soc. Vol. 126 (2004), pages 3714 and 3715, J. Biol. Chem. Vol. 264 (1989), pages 15835 to 15842, Current Medicinal Chemitry Vol. 9 (2002), pages 1323 to 1348, Appl. Microbio. Vol. 41 (2005), pp. 23 to 28, Biochemistry (Mosque) Vol. 69 (2004), pages 1344 to 1352, Appl. Microbio. Bd. 37 (2001), pages 168 to 173, Food Chem. Vol. 85 (2004), pages 553 to 558, Chem. Pharm. Bull. Vol. 51 (2003), pages 719 to 723, Bioorg.Med.Chem , Vol. 12 (2004), pages 1963 to 1968, and J. Enz. Med. Chem. Vol. 19 (2004), pages 367 to 371.
  • Preferred urease inhibitors are substituted thiophosphoric triamides of the formula (I)
  • R is a C 1 -C 30 -alkyl radical, preferably a C 2 -C 10 -alkyl radical, particularly preferably a C 3 -C 5 -alkyl radical.
  • the alkyl radicals may be branched or unbranched.
  • C 1 to C 10 -alkyl radicals are methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, n-pentyl, isopentyl, n-hexyl, isohexyl, n -Heptyl, isoheptyl, n-octyl, isooctyl, n-nonyl, isononyl, n-decyl and isodecyl.
  • Very particularly preferred alkyl radicals are n-propyl and n-butyl.
  • the substituted thiophosphoric triamides of the formula (I) are obtained, for example, by reacting thiophosphoryl trichloride with alkylamine and ammonia.
  • urease inhibitors are substituted phosphoric triamides of
  • substituted phosphoric triamides of the formula (II) are formed, for example, by hydrolysis of the thiophosphoric triamides of the formula (I).
  • a further preferred urease inhibitor is also phenylphosphorodiamidate (CAS No. 7450-69-3).
  • composition according to the invention usually contains from 0.0001 to 0.1% by weight, preferably from 0.005 to 0.08% by weight, particularly preferably from 0.01 to 0.06% by weight, very particularly preferably from 0.015 to 0.045% by weight. -%, of the at least one urease inhibitor.
  • compositions according to the invention have an excellent odor-preventing effect and a high absorption capacity.
  • At least one urease inhibitor is mixed together with at least one water-absorbing polymer, ii) at least one urease inhibitor is milled together with at least one water-absorbing polymer, iii) at least one urease inhibitor is sprayed onto at least one water-absorbing polymer, iv) the at least one water-absorbing polymer is prepared by solution polymerization of a monomer solution and at least one urease inhibitor is dissolved or suspended in the monomer solution.
  • the type of mixing is not limited and can already take place during the preparation of the water-absorbing polymer, for example during cooling after the post-crosslinking or the subsequent sieving, or in a special mixer. Suitable mixers have already been described above in the post-crosslinking of the water-absorbing polymer.
  • the type of grinding is also subject to no restriction. Suitable apparatuses have already been described above in the comminution of the water-absorbing polymer.
  • the type of spraying is subject to no restriction.
  • the urease inhibitor can be sprayed on as a solution or as a melt, for example during postcrosslinking of the water-absorbing polymer in the mixers mentioned there.
  • the at least one urease inhibitor is sprayed dissolved in a suitable solvent.
  • suitable solvents are water, water / acetone mixtures, water / propylene glycol mixtures and the solvents and solvent mixtures mentioned in the postcrosslinking.
  • the concentration of the urease inhibitor in the solution is usually 0.5 to 30 wt .-%, preferably 1 to 20 wt .-%, particularly preferably 2 to 10 wt .-%.
  • a composition of the invention is prepared which has a higher proportion of the at least one urease inhibitor, usually 1 to 50 wt .-%, preferably 5 to 40 wt .-%, particularly preferably 10 to 30 wt .-%.
  • the high-concentration composition thus obtained can then be diluted with further water-absorbing polymer to the desired final content.
  • Further articles of the present invention are hygiene articles containing at least one composition according to the invention, in particular diapers or inserts for heavy and / or light incontinence, as well as sanitary napkins, baby diapers and cat litter, and methods for producing hygiene articles, wherein at least one composition according to the invention is used.
  • the water-absorbing compositions according to the invention are capable of reliably preventing unpleasant odors which may arise in hygiene articles.
  • the compositions according to the invention are storage-stable, so that the odor-binding effect is also present even after prolonged storage, for example 6 months. Furthermore, the compositions of the invention after prolonged storage no visible discoloration.
  • Measurements should be taken at an ambient temperature of 23 ⁇ 2 ° C and a relative humidity of 50 ⁇ 10%, unless otherwise specified.
  • the water-absorbing polymers are thoroughly mixed before the measurement.
  • centrifuge retention capacity of the water-absorbing polymer particles is determined according to the test method No. 441.2-02 "Centrifuge retention capacity" recommended by the EDANA (European Disposables and Nonwovens Association).
  • each of the compositions prepared above were placed in a 100 ml Erlenmeyer flask and treated with a freshly prepared solution of 30 mg urease (from sword beans, lyophilized 5 U / mg for serum urea determination, Merck KGaA, DE) and 50 ml of 0.9% saline solution, the saline solution containing 8.56 g / l urea, added and sealed with a stopper with internal diffusion tubes (Dräger® tube, ammonia 20 / a-D, 20 to 1500 ppm * h). After 6 hours, the reading was read. The measurement was carried out at 23 ° C.
  • the kneader was stirred at maximum speed (98 rpm of the faster shaft, about 49 rpm on the slower shaft, ratio about 2: 1).
  • the kneader coat was heated with 80 ° C. warm heat transfer medium.
  • 152 g of SAP fine dust having a degree of neutralization of 65 mol% and a particle size of less than 100 ⁇ m were added.
  • the jacket heating was switched off and left to react for a further 15 minutes in the kneader.
  • the gel was cooled to 65 ° C and filled. The gel was dried at 155 ° C.
  • the centrifuge retention capacity (CRC) of the water-absorbing polymers was 35.7 g / g.
  • the centrifuge retention capacity (CRC) of the surface postcrosslinked water-absorbing polymers was 28.5 g / g.
  • the kneader was stirred at maximum speed (98 rpm of the faster shaft, about 49 rpm on the slower shaft, ratio about 2: 1).
  • the kneading jacket was heated with 80 ° C. warm heat. ger heated.
  • 152 g of SAP fine dust having a degree of neutralization of 60 mol% and a particle size of less than 100 ⁇ m were added.
  • the jacket heating was switched off and left to react for a further 15 minutes in the kneader.
  • the gel was cooled to 65 ° C and filled.
  • the drying of the gel was carried out at 155 ° C for 90 minutes with a loading of 700 g per plate in a convection oven. After grinding three times in a roller mill (Gebr. Baumeister LRC 125/70, gap widths 1000 ⁇ m, 600 ⁇ m, 400 ⁇ m), the polymer was sieved to a sieve cut between 850 and 100 ⁇ m.
  • the centrifuge retention capacity (CRC) of the water-absorbing polymers was 35.7 g / g.
  • the centrifuge retention capacity (CRC) of the surface postcrosslinked water-absorbing polymers was 29.2 g / g.
  • the kneader was stirred at maximum speed (98 rpm of the faster shaft, about 49 rpm on the slower shaft, ratio about 2: 1).
  • the kneader coat was heated with 80 ° C warm heat transfer. After reaching the maximum temperature, the jacket heating was switched off and left to react for a further 15 minutes in the kneader.
  • the gel was cooled to 65 ° C and filled. The drying of the gel was carried out at 175 ° C for 75 minutes with a loading of 700 g per sheet in a convection oven. After grinding three times in a roller mill (Gebr. Baumeister LRC 125/70, gap widths 1000 ⁇ m, 600 ⁇ m, 400 ⁇ m), the polymer was sieved to a sieve cut between 850 and 100 ⁇ m.
  • the centrifuge retention capacity (CRC) of the water-absorbing polymers was 36.1 g / g.
  • the centrifuge retention capacity (CRC) of the surface-postcrosslinked water-absorbing polymers was 30.0 g / g.
  • Example 2 Per 100 g of water-absorbing polymer from Example 1 were mixed in a tumble mixer with different amounts of sodium fluoride for 20 minutes. Subsequently, centrifuge retention capacity (CRC) was measured.
  • CRC centrifuge retention capacity
  • Example 4 The procedure was as in Example 4. Instead of sodium fluoride, an 80 wt .-% mixture of N- (n-butyl) -thiophosphorklaretriamid and N- (n-propyl) - thiophosphoric triamide (weight ratio 3: 1) was used.

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  • Absorbent Articles And Supports Therefor (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne des compositions absorbant l'eau et inhibitrices des odeurs, renfermant au moins un polymère absorbant l'eau et au moins un inhibiteur d'uréase, caractérisées en ce que le polymère est un polymère porteur de groupes acides, dont les groupes acides sont neutralisés à 50 à 65 % mol, et en ce que la teneur en inhibiteur d'uréase est de 0,0001 à 0,1 % en poids, par rapport à la composition. L'invention concerne en outre un procédé de production de ladite composition, ainsi que des articles hygiéniques et leur production.
EP07703780A 2006-01-20 2007-01-11 Compositions absorbant l'eau et inhibitrices des odeurs Withdrawn EP1981551A2 (fr)

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EP07703780A EP1981551A2 (fr) 2006-01-20 2007-01-11 Compositions absorbant l'eau et inhibitrices des odeurs

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EP06100673A EP1813291A1 (fr) 2006-01-20 2006-01-20 Composition absorbant de l'eau à propriétés désodorisantes contenant des inhibiteurs de l'urease
EP07703780A EP1981551A2 (fr) 2006-01-20 2007-01-11 Compositions absorbant l'eau et inhibitrices des odeurs
PCT/EP2007/050235 WO2007085531A2 (fr) 2006-01-20 2007-01-11 Compositions absorbant l'eau et inhibitrices des odeurs

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EP07703780A Withdrawn EP1981551A2 (fr) 2006-01-20 2007-01-11 Compositions absorbant l'eau et inhibitrices des odeurs

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US (1) US20100003209A1 (fr)
EP (2) EP1813291A1 (fr)
JP (1) JP2009523874A (fr)
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WO (1) WO2007085531A2 (fr)

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WO2007141188A2 (fr) * 2006-06-08 2007-12-13 Basf Se Procédé pour immobiliser le 2-bromo-2-nitro-1,3-propanediol
JP4494509B2 (ja) * 2008-06-10 2010-06-30 花王株式会社 吸収体及び吸収性物品
EP2198892A1 (fr) 2008-12-17 2010-06-23 Sued-Chemie AG Utilisation d'un support destiné à l'inhibition de l'activité de l'uréase, ainsi que son procédé de fabrication et article absorbant
JP6324724B2 (ja) 2011-11-15 2018-05-16 株式会社日本触媒 吸水剤組成物及びその製造方法、並びにその保管及び在庫方法
CN102512705B (zh) * 2012-01-05 2014-04-02 深圳市宜丽环保科技有限公司 一种预防尿布疹的材料及其生产方法
KR101477252B1 (ko) 2012-04-13 2014-12-29 주식회사 엘지화학 고흡수성 수지의 제조 방법
EP2859039A2 (fr) * 2012-06-08 2015-04-15 Basf Se Superabsorbant limitant les odeurs
CN106688904B (zh) * 2016-12-11 2019-11-19 东阳市天杨建筑工程设计有限公司 一种清香型抑菌猫砂的制备方法
CN108885200A (zh) * 2016-12-23 2018-11-23 株式会社Lg化学 评估超吸收性聚合物及包含其的产品的除臭能力的方法
KR102075735B1 (ko) 2017-02-16 2020-02-10 주식회사 엘지화학 고흡수성 수지의 제조 방법
KR20220066345A (ko) * 2019-10-18 2022-05-24 스미토모 세이카 가부시키가이샤 방취제 조성물, 흡수체 및 흡수성 물품
CN110915666A (zh) * 2019-10-31 2020-03-27 安徽启威生物科技有限公司 一种抑菌除臭的猫砂及其制备方法
KR20230008053A (ko) * 2020-04-27 2023-01-13 스미토모 세이카 가부시키가이샤 흡수성 물품

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EP1813291A1 (fr) 2007-08-01
WO2007085531A3 (fr) 2007-10-11
JP2009523874A (ja) 2009-06-25
US20100003209A1 (en) 2010-01-07
WO2007085531A2 (fr) 2007-08-02
CN101370529A (zh) 2009-02-18

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