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WO2009101060A1 - Compositions inhibitrices d’odeur et absorbant l’eau - Google Patents

Compositions inhibitrices d’odeur et absorbant l’eau Download PDF

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Publication number
WO2009101060A1
WO2009101060A1 PCT/EP2009/051469 EP2009051469W WO2009101060A1 WO 2009101060 A1 WO2009101060 A1 WO 2009101060A1 EP 2009051469 W EP2009051469 W EP 2009051469W WO 2009101060 A1 WO2009101060 A1 WO 2009101060A1
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WIPO (PCT)
Prior art keywords
water
absorbing polymer
preparation
composition according
ginkgo
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.)
Ceased
Application number
PCT/EP2009/051469
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German (de)
English (en)
Inventor
Rainer Dobrawa
Volker Braig
Francisco Javier Lopez Villanueva
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BASF SE
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BASF SE
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Filing date
Publication date
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Publication of WO2009101060A1 publication Critical patent/WO2009101060A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/01—Deodorant compositions
    • A61L9/013—Deodorant compositions containing animal or plant extracts, or vegetable material
    • 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
    • A61L2300/20—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices containing or releasing organic materials
    • A61L2300/30—Compounds of undetermined constitution extracted from natural sources, e.g. Aloe Vera

Definitions

  • the present invention relates to odor-inhibiting water-absorbing compositions containing an acidic water-absorbing polymer and a herbal preparation.
  • Water-absorbent polymers are used in the manufacture of diapers, tampons, sanitary napkins 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.
  • JP-S60-158861 discloses the use of tea extracts for odor inhibition in water-absorbent compositions.
  • the object of the present invention was to provide water-absorbing compositions with improved odor inhibition.
  • odor-inhibiting compositions comprising at least one water-absorbing polymer obtainable by polymerization of an aqueous monomer solution or suspension containing
  • ginkgo ginkgo biloba
  • willow salix
  • meadowsweet filamentipendula
  • meadowsweet leaves mountain ungulate
  • notopterygii rhizoma true bearberry
  • arctostaphylos uva-ursi tormentil
  • Vegetable preparations are, for example, plant parts which are washed, ground and / or dried. However, the plant parts can also be fermented before being used in the preparation. It is also possible to use liquid pressed from the plant parts. Further vegetable preparations which can be used according to the invention are herbal extracts, for example aqueous, alcoholic or ethereal extracts. The extractions can be carried out at ambient temperature or at elevated temperature. It can also be extracted with supercritical carbon dioxide. Suitable herbal preparations are also dry extracts and the extraction residues.
  • the monomer a) is preferably neutralized to 30 to 64 mol%, particularly preferably to 35 to 62 mol%, very particularly to 40 to 60 mol%. A lower degree of neutralization leads to an improved odor inhibition and a reduced absorption capacity.
  • composition of the invention preferably contains 0.01 to 10 wt .-%, particularly preferably 0.1 to 5 wt .-%, most preferably 0.5 to 3 wt .-%, of the natural product.
  • composition according to the invention preferably contains at least 90% by weight, more preferably at least 95% by weight, most preferably at least 97% by weight, of the water-absorbing polymer.
  • Particularly preferred herbal preparations are prepared from ginkgo leaves, willow bark, meadowsweet, mountain angelica root, true bearberry leaves and / or bloodroot root.
  • Very particularly preferred herbal preparations are prepared from ginkgo and / the genuine bearberry, these are in particular untreated, ground ginkgo leaves and / or leaf extract of the genuine bearberry.
  • the monomers a) are preferably water-soluble, ie the solubility in water at 23 ° C. is typically at least 1 g / 100 g of water, preferably at least 5 g / 100 g of water, more preferably at least 25 g / 100 g of water, most preferably at least 50 g / 100 g of water. Ideally, the monomers a) miscible with water in any ratio.
  • Suitable monomers a) are, for example, ethylenically unsaturated carboxylic acids, such as acrylic acid, methacrylic acid, maleic acid, fumaric acid and itaconic acid. Particularly preferred monomers are acrylic acid and methacrylic acid. Very particular preference is given to acrylic acid.
  • Suitable monomers a) are, for example, ethylenically unsaturated sulfonic acids, such as styrenesulfonic acid and 2-acrylamido-2-methylpropanesulfonic acid (AMPS).
  • sulfonic acids such as styrenesulfonic acid and 2-acrylamido-2-methylpropanesulfonic acid (AMPS).
  • AMPS 2-acrylamido-2-methylpropanesulfonic acid
  • the proportion of acrylic acid and / or salts thereof in the total amount of monomers a) is preferably at least 50 mol%, particularly preferably at least 90 mol%, very particularly preferably at least 95 mol%.
  • Preferred 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 may be mono-, di- or tricarboxylic acids.
  • R 1 is more 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 as acrylic acid with be taken into account.
  • an acrylic acid having a corresponding content of hydroquinone half-ether can be used.
  • Crosslinkers b) are preferably compounds having at least two polymerizable groups which can be incorporated in the polymer network in free-radically polymerized form.
  • Suitable crosslinkers b) are, for example, ethylene glycol dimethacrylate, diethylene glycol diacrylate, polyethylene glycol diacrylate, allyl methacrylate, trimethylolpropane triacrylate, triallylamine, tetraallylammonium chloride, tetraallyloxyethane, as described in EP 530 438 A1, di- and triacrylates, as in EP 547 847 A1, EP 559 476 A1, EP 632 068 A1, WO 93/21237 A1, WO 2003/104299 A1, WO 2003/104300 A1, WO 2003/104301 A1 and DE 103 31 450 A1, mixed acrylates which, in addition to acrylate groups, contain further ethylenically unsaturated groups, as described in DE 103 31 456 A1 and DE 103 55 401
  • Suitable crosslinkers b) are in particular N, N'-methylenebisacrylamide and N, N'-methylenebismethacrylamide, esters of unsaturated mono- or polycarboxylic acids of polyols, such as diacrylate or triacrylate, for example butanediol or
  • Ethylene glycol diacrylate or methacrylate and also 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 343 427 A2.
  • crosslinkers b) are pentaerythritol di-, pentaerythritol tri- and pentaerythritol tetraallyl ethers, polyethylene glycol diallyl ether, ethylene glycol diallyl ether, glycerol and glycerol triallyl ethers, 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 100 and 1000, for example polyethylene glycol 400 diacrylate.
  • crosslinkers b) are di- and triacrylates of 3 to 20 times ethoxylated glycerol, 3 to 20 times ethoxylated trimethylolpropane, 3 to 20 times ethoxylated trimethylolethane, in particular di- and triacrylates of 2 to 6-times ethoxylated glycerol or trimethylolpropane, the 3-fold propoxylated glycerol or trimethylolpropane, as well as the 3-times mixed ethoxylated or propoxylated glycerol or trimethylolpropane, 15-ethoxylated glycerol or trimethylolpropane, as well as at least 40-times ethoxylated glycerol, trimethylolethane or trimethylolpropane.
  • Very particularly preferred crosslinkers b) are those with acrylic acid or methacrylic acid to di- or triacrylates esterified polyethoxylated and / or propoxylated glycerols, as described for example in WO 2003/104301 A1. 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 from 0.05 to 1, 5 wt .-%, particularly preferably 0.1 to 1 wt .-%, most preferably 0.3 to 0.6 wt .-%, each based on Monomer a).
  • initiators c) it is possible to use all compounds which decompose into free radicals under the polymerization conditions, for example peroxides, hydroperoxides, hydrogen peroxide, persulfates, azo compounds and the so-called redox initiators. Preference is given to the use of water-soluble initiators. In some cases, it is advantageous to use mixtures of different initiators, for example mixtures of hydrogen peroxide and sodium or potassium peroxodisulfate. Mixtures of hydrogen peroxide and sodium peroxodisulfate can be used in any proportion.
  • ethylenically unsaturated monomers d) copolymerizable with the ethylenically unsaturated acid-bearing monomers a) include acrylamide, methacrylamide, crotonamide, hydroxyethyl acrylate, hydroxyethyl methacrylate, dimethylaminoethyl methacrylate, dimethylaminoethyl acrylate, dimethylaminopropyl acrylate, diethylaminopropyl acrylate, dimethylaminobutyl acrylate, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, dimethylaminoneopentyl acrylate and dimethylaminoneopentyl methacrylate.
  • water-soluble polymers e it is possible to use polyvinyl alcohol, polyvinylpyrrolidone, starch, starch derivatives, polyglycols or polyacrylic acids, preferably polyvinyl alcohol and starch.
  • the monomer solution may be polymerized prior to polymerization 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.
  • Suitable reactors are, for example, kneading reactors or belt reactors.
  • the polymer gel resulting from the polymerization of an aqueous monomer solution or suspension is continuously comminuted by, for example, counter-rotating stirring shafts, as described in WO 2001/38402 A1.
  • the polymerization on the belt is described, for example, in DE 38 25 366 A1 and US Pat. No. 6,241,928.
  • Polymerization in a belt reactor produces a polymer gel which must be comminuted in a further process step, for example in a meat grinder, extruder or kneader.
  • the acid groups of the hydrogels obtained are partially neutralized, the usual neutralizing agents can be used, preferably alkali metal hydroxides, alkali metal oxides, alkali metal carbonates or alkali metal bicarbonates and mixtures thereof.
  • alkali metal salts and ammonium salts can be used.
  • Sodium and potassium are particularly preferred as alkali metals, but most preferred are sodium hydroxide, sodium carbonate or sodium bicarbonate and mixtures thereof.
  • the neutralization is preferably carried out at the stage of the monomers. This is usually done by mixing the neutralizing agent as an aqueous solution, as a melt, or preferably as a solid.
  • the neutralizing agent for example, 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 hydrogel stage it is also possible to carry out the neutralization after the polymerization at the hydrogel stage. Furthermore, it is possible to neutralize up to 40 mol%, preferably 10 to 30 mol%, particularly preferably 15 to 25 mol%, of the acid groups before the polymerization by adding a part of the neutralizing agent already to the monomer solution and the desired final degree of neutralization only after the polymerization is adjusted at the level of the hydrogel. If the hydrogel is at least partially neutralized after the polymerization, the hydrogel is preferably comminuted mechanically, for example by means of a meat grinder, wherein the neutralizing agent can be sprayed, sprinkled or poured on and then thoroughly mixed in. For this purpose, the gel mass obtained can be further gewolfft for homogenization.
  • the hydrogel is then preferably dried with a belt dryer until the residual moisture content is preferably less than 15 wt .-%, more preferably less than 10 wt .-%, most preferably less than 8 wt .-%, wherein the water content according to the the EDANA (European Disposables and Nonwovens Association) recommended test method No. WSP 230.2-05 "Moisture content" is determined.
  • a fluidized bed dryer or a heated ploughshare mixer can be used for drying.
  • it is advantageous in the drying of this gel to ensure rapid removal of the evaporating water.
  • 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 solids content of the gel before drying is therefore preferably between 25 and 80% by weight.
  • Particularly advantageous is the ventilation of the dryer with nitrogen or other non-oxidizing inert gas.
  • the dried hydrogel is thereafter ground and classified, wherein for grinding usually one- or multi-stage roller mills, preferably two- or three-stage roller mills, pin mills, hammer mills or vibratory mills can be used.
  • the mean particle size of the polymer fraction separated as a product fraction is preferably at least 200 ⁇ m, more preferably from 250 to 600 ⁇ m, very particularly from 300 to 500 ⁇ m.
  • the mean particle size of the product fraction can be determined by means of the test method no. WSP 220.2-05 "particle size distribution" recommended by the EDANA (European Disposables and Nonwovens Association), in which the mass fractions of the sieve fractions are cumulatively applied and the average particle size is determined graphically.
  • the mean particle size here is the value of the mesh size, which results for accumulated 50 wt .-%.
  • the proportion of particles having a particle size of preferably at least 150 .mu.m, more preferably at least 200 .mu.m, most preferably at least 250 .mu.m, is preferably at least 90 wt .-%, more preferably at least 95 wt .-%, most preferably at least 98 wt .-%.
  • the proportion of particles having a particle size of preferably at most 850 ⁇ m, particularly preferably at most 700 ⁇ m, very particularly preferably at most 600 ⁇ m, is preferably at least 90% by weight, particularly preferably at least 95% by weight, very particularly preferably at least 98% by weight .-%.
  • the polymer particles can be postcrosslinked to further improve the properties.
  • Suitable postcrosslinkers are compounds which contain groups which can form covalent bonds with at least two carboxylate groups of the polymer gel.
  • Suitable compounds are, for example Alkoxysilyl compounds, polyaziridines, polyamines, polyamidoamines, di- or polyepoxides, as described in EP 83 022 A2, EP 543 303 A1 and EP 937 736 A2, di- or polyfunctional alcohols, as in DE 33 14 019 A1, DE 35 23 617 A1 and EP 450 922 A2, or ß-hydroxyalkylamides, as described in DE 102 04 938 A1 and US 6,239,230.
  • the amount of postcrosslinker is preferably 0.001 to 2 wt .-%, more preferably 0.02 to 1 wt .-%, most preferably 0.05 to 0.2 wt .-%, each based on the polymer.
  • polyvalent cations are applied to the particle surface in addition to the postcrosslinkers before, during or after the postcrosslinking.
  • polyvalent cations which can be used in the process according to the invention are, for example, divalent cations, such as the cations of zinc, magnesium, calcium, iron and strontium, trivalent cations, such as the cations of aluminum, iron,
  • tetravalent cations such as the cations of titanium and zirconium.
  • chloride, bromide, sulfate, hydrogen sulfate, carbonate, bicarbonate, nitrate, phosphate, hydrogen phosphate, dihydrogen phosphate and carboxylate, such as acetate and lactate are possible.
  • Aluminum sulfate is preferred.
  • polyamines can also be used as polyvalent cations.
  • the amount of polyvalent cation used is, for example, 0.001 to 1.5% by weight, preferably 0.005 to 1% by weight, particularly preferably 0.02 to 0.8% by weight. in each case based on the polymer.
  • the post-crosslinking is usually carried out so that a solution of the Postcrosslinker is sprayed onto the hydrogel or the dry polymer particles. Following the spraying, the polymer particles coated with the postcrosslinker are thermally dried, whereby the postcrosslinking reaction can take place both before and during the drying.
  • the spraying of a solution of the postcrosslinker is preferably carried out in mixers with moving mixing tools, such as screw mixers, disk mixers, plowshare mixers and paddle mixers.
  • moving mixing tools such as screw mixers, disk mixers, plowshare mixers and paddle mixers.
  • horizontal mixers such as plowshare mixers and paddle mixers
  • vertical mixers are particularly preferred.
  • suitable mixers are Lödige mixers, Bepex mixers, Nauta mixers, Processall mixers and Schugi mixers.
  • the postcrosslinkers are typically used as an aqueous solution. By adding nonaqueous solvent, the penetration depth of the postcrosslinker into the polymer particles can be adjusted.
  • the thermal drying is preferably carried out in contact dryers, more preferably paddle dryers, very particularly preferably disk dryers.
  • Suitable dryers include Bepex-T rockner and Nara dryer.
  • 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. Particularly advantageous is mixed and dried in a fluidized bed dryer.
  • Preferred drying temperatures are in the range 100 to 250 0 C, preferably 120 to 220 0 C, particularly preferably 130 to 210 ° C most preferably 150 to 200 0 C. by weight, the preferred residence time at this temperature in the reaction mixer or dryer is preferably at least 10 minutes , more preferably at least 20 minutes, most preferably at least 30 minutes, and usually at most 60 minutes.
  • the postcrosslinked polymer can be re-classified.
  • the postcrosslinked polymer particles can be coated or rehydrated to further improve the properties.
  • Suitable coatings to improve the acquisition behavior and the permeability are, for example, inorganic inert substances, such as water-insoluble metal salts, organic polymers, cationic polymers and di- or polyvalent metal cations.
  • Suitable coatings for dust binding are, for example, polyols.
  • Suitable coatings against the unwanted tendency to caking Polymer particles are, for example, fumed silica, such as Aerosil® 200, and surfactants, such as Span® 20.
  • the water-absorbing polymer particles have a water content of preferably less than 15 wt .-%, more preferably less than 10 wt .-%, most preferably less than 8 wt .-%, wherein the water content according to the EDANA (European Disposables and Nonwovens Association) recommended test method no. WSP 230.2-05 "Moisture content" is determined.
  • EDANA European Disposables and Nonwovens Association
  • the water-absorbing polymer particles have a centrifuge retention capacity (CRC) of typically at least 15 g / g, preferably at least 20 g / g, preferably at least 22 g / g, more preferably at least 24 g / g, most preferably at least 26 g / g.
  • the centrifuge retention capacity (CRC) of the water-absorbing polymer particles is usually less than 60 g / g.
  • the centrifuge retention capacity (CRC) is determined according to the test method no. WSP 241.2- 05 "Centrifuge retention capacity" recommended by the EDANA (European Disposables and Nonwovens Association).
  • the water-absorbing polymer particles have an absorption under a pressure of 0.7 psi (4.83 kPa) of typically at least 15 g / g, preferably at least 20 g / g, more preferably at least 22 g / g, more preferably at least 24 g / g, especially preferably at least 26 g / g.
  • the absorption under a pressure of 0.7 psi (AULO.7 psi) of the water-absorbent polymer particles is usually less than 60 g / g.
  • the absorption under a pressure of 0.7 psi (AULO.7 psi) is determined analogously to the test method No.
  • WSP 242.2-05 "Absorption under pressure" recommended by the EDANA (European Disposables and Nonwovens Association), whereby instead of a pressure of 0.3 psi (2 , 07 kPa), a pressure of 0.7 psi (4.83 kPa) is set.
  • Another object of the present invention are methods for preparing the compositions of the invention, wherein
  • At least one vegetable preparation is mixed together with at least one water-absorbing polymer and / or ii) at least one vegetable preparation is ground together with at least one water-absorbing polymer and / or iii) at least one vegetable preparation is sprayed onto at least one water-absorbing polymer and / or iv) the at least one water-absorbing polymer is prepared by solution polymerization of a monomer solution and at least one vegetable preparation is dissolved or suspended in the monomer solution and the composition obtained according to i), ii), iii) and / or iv) is optionally mixed together with at least one water-absorbing polymer. Variants i) and ii) are preferred.
  • the type of mixing is subject to no restriction and can already at the
  • 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 herbal preparation can be sprayed on as a solution, emulsion, dispersion, suspension or slurry, for example during post-crosslinking of the water-absorbing polymer in the mixers mentioned there.
  • a composition of the invention is prepared which has a higher proportion of the at least one vegetable preparation, 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 to the desired final content with further water-absorbing polymer.
  • composition according to the invention in particular feminine hygiene articles, articles for severe incontinence or small animal litter, and methods for the production of 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.
  • Preparation of the water-absorbing polymer 5009 g of a 37.3% strength by weight aqueous sodium acrylate solution were mixed with 477 g of acrylic acid and 430 g of water and rendered inert with nitrogen. This mixture was introduced into a Werner & Pfleiderer LUK 8.0 K2 kneader (2 sigma waves) inerted with nitrogen and admixed successively with 9.0 g of polyethylene glycol diacrylate 400 (diacrylate of a polyethylene glycol having an average molecular weight of 400 g / mol), 4 , 4 g of a 1.0% by weight aqueous ascorbic acid solution, 18.1 g of a 15% strength by weight aqueous sodium persulfate solution and 3.9 g of a 3% strength by weight aqueous hydrogen peroxide solution.
  • polyethylene glycol diacrylate 400 diacrylate of a polyethylene glycol having an average molecular weight of 400 g / mol
  • 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 with 80 0 C hot heat transfer medium has been heated.
  • 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 plate in a convection oven. After three times grinding in a roller mill (Gebr.
  • the obtained water-absorbing polymers had a degree of neutralization of 75 mol%.
  • Water-absorbing polymers having a degree of neutralization of 40 mol%, 50 mol% and 65 mol% were obtained analogously by adjusting the amounts of sodium acrylate solution, acrylic acid and water, the solids content of the monomer solution being kept constant.
  • Example 1 Per 100 g of water-absorbing polymer from Example 1 were mixed in a tumble mixer with 0.5 g ginkgo dry extract per 20 minutes.
  • Example 2 The procedure was as in Example 2. Instead ginkgo dry extract 0.5% by weight of willow bark were (cut, then ground), dried meadowsweet (ground), mountain angelica root (delivery cut, then ground), dry extract of the genuine bearberry leaves and Bloodroot root (delivered cut, then ground) used. An Ika A10 analysis mill was used for the grinding, for the blends the powder fraction ⁇ 250 ⁇ m was used. The following table shows the measurement results:
  • Example 3 The procedure was as in Example 3. Instead ginkgo dry extract 5 g Pu-Erh tea, white pepper and dried meadowsweet (ground) were used. No effect was observed.

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  • Animal Behavior & Ethology (AREA)
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Abstract

L'invention concerne des compositions inhibitrices d'odeur et absorbant l'eau, contenant un polymère acide absorbant l'eau et une préparation à base de plante fabriquée à partir de ginkgo, de saule, de reine-des-prés, à l'exception des feuilles de reine-des-prés, de l'angélique, de la busserole raisin d'ours et de la tormentille.
PCT/EP2009/051469 2008-02-15 2009-02-10 Compositions inhibitrices d’odeur et absorbant l’eau Ceased WO2009101060A1 (fr)

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EP08101657.8 2008-02-15
EP08101657 2008-02-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011023560A3 (fr) * 2009-08-26 2011-06-03 Basf Se Compositions inhibant les odeurs
WO2013073614A1 (fr) 2011-11-15 2013-05-23 株式会社日本触媒 Composition absorbant l'eau et procédé pour sa production, ainsi que son procédé d'entreposage et de stockage

Citations (7)

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WO2005092955A1 (fr) * 2004-03-29 2005-10-06 Nippon Shokubai Co., Ltd. Agent absorbant de l'eau particulaire avec une forme pulvérisée irrégulièrement
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