EP2027210A1 - Semelles de chaussure avec des propriétés absorbant l'eau - Google Patents

Semelles de chaussure avec des propriétés absorbant l'eau

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Publication number
EP2027210A1
EP2027210A1 EP07729230A EP07729230A EP2027210A1 EP 2027210 A1 EP2027210 A1 EP 2027210A1 EP 07729230 A EP07729230 A EP 07729230A EP 07729230 A EP07729230 A EP 07729230A EP 2027210 A1 EP2027210 A1 EP 2027210A1
Authority
EP
European Patent Office
Prior art keywords
water
components
polyurethane foam
absorbing polymer
propellant
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Withdrawn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
EP07729230A
Other languages
German (de)
English (en)
Inventor
Markus SCHÜTTE
Andre Kamm
Raffaela Villa
Davide Fusetti
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 EP07729230A priority Critical patent/EP2027210A1/fr
Publication of EP2027210A1 publication Critical patent/EP2027210A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
    • C08G18/4072—Mixtures of compounds of group C08G18/63 with other macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B13/00—Soles; Sole-and-heel integral units
    • A43B13/02—Soles; Sole-and-heel integral units characterised by the material
    • A43B13/04—Plastics, rubber or vulcanised fibre
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/63—Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers
    • C08G18/632—Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers onto polyethers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/22—After-treatment of expandable particles; Forming foamed products
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • C08L75/08—Polyurethanes from polyethers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2110/00—Foam properties
    • C08G2110/0008—Foam properties flexible
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2350/00—Acoustic or vibration damping material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2410/00—Soles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof

Definitions

  • the present invention relates to a batch process for producing a polyurethane foam comprising (a) polyisocyanates with (b) at least one higher molecular weight compound having at least two reactive hydrogen atoms and (c) optionally low molecular weight chain extenders and / or crosslinking agents, (d) blowing agents, containing optionally water, (e) catalysts, (f) water-absorbing polymer, (g) capsules optionally containing latent heat storage and (h) optionally mixing other additives and reacting the resulting reaction mixture to polyurethane foam, either the propellant d) contains no water, or if the propellant d) contains water, propellant d) and water-absorbing polymer f) is brought into contact only during the preparation of the reaction mixture.
  • the invention further relates to polyurethane foams obtainable by such a process and to shoe soles comprising such a polyurethane foam.
  • a pleasant climate is important for human well-being. Above all, the temperature and humidity of the immediate body environment play an important role. This body climate is generally influenced by clothing.
  • Clothing should support as much as possible the body's own mechanisms for heat regulation.
  • One such mechanism is sweating.
  • the body produces moisture that evaporates on the skin surface. The body is thereby deprived of evaporation energy in the form of heat.
  • the absorption capacity of the materials for water can be increased, for example, by hydrophilic polyurethane foams, wherein the hydrophilicity of the foams can be achieved by using polar polyols such as polyesterols or special polyetherols with high levels of ethylene oxide (EO). Examples thereof can be found in the specifications US Pat. No. 3,869,993, US Pat. No. 3,884,417 and WO 2004074343.
  • polar polyols such as polyesterols or special polyetherols with high levels of ethylene oxide (EO).
  • EO ethylene oxide
  • a disadvantage of such materials is the swelling with increase in volume upon absorption of high amounts of moisture.
  • foams are obtained with lower elasticity and higher compression set. This is a particular disadvantage when using such materials in shoes as insoles.
  • WO 03097345 discloses a hydrophilic polyurethane foam with a content of water-absorbing polymer of not more than 0.1% by weight, which makes it possible to transport moisture in the polyurethane foam material. According to WO 03097345, a higher content of water-absorbing polymer causes it to gel in regions of high humidity, thereby preventing the transport of moisture. Further, WO 03097345 discloses that in the preparation of the polyurethane foam, an aqueous phase containing the water-absorbent polymer is used.
  • WO 9744183 also discloses the use of water-absorbing particles in a polyurethane foam.
  • the foams disclosed in WO 9744183 are prepared in the form of blocks. These are obtained in a continuous procedure by reacting a hydrophilic isocyanate prepolymer in combination with acrylic latex and water and then pressed in a further step by Thermover- molding to soles. In this process, the isocyanate is reacted with a high stoichiometric excess of water.
  • the prepolymers used in this case are obtained by reacting TDI or MDI with hydrophilic polyetherols and generally have NCO contents of between 5 and 8%.
  • the water-absorbing polymer is used together with the isocyanate-reactive component.
  • Foam and shaping takes place in one step. This eliminates subsequent additional necessary for the molding steps and associated overhead, for example, by post-processing of the parts and material loss by cutting waste.
  • Water-absorbing polymers can not be used because of their properties or only in very small proportions in the isocyanate or in the water-containing isocyanate-reactive component, since these swell with water and thereby greatly increase the viscosity of the polyol. This leads to only a limited miscibility of the isocyanate component with the isocyanate-reactive component and thus inhomogeneous products.
  • the object of the present invention is to provide a simple process which makes it possible to produce polyurethane foams having a content of water-absorbing polymer of up to 20% by weight, based on the total weight of the polyurethane foam.
  • a discontinuous process for preparing a polyurethane foam which comprises (a) polyisocyanates with (b) at least one higher molecular weight compound having at least two reactive hydrogen atoms and (c) optionally low molecular weight chain extender and (d) blowing agents containing optionally water, (e) catalysts, (f) water-absorbing polymer, (g) optionally Capsules containing latent heat storage and (h) optionally other additives and reacting the resulting reaction mixture to polyurethane foam, either the propellant d) contains no water or, if the propellant d) contains water, propellant d) and water-absorbing polymer f) only at the Preparation of the reaction mixture is brought into contact.
  • this invention by polyurethane foams, obtainable by a process according to the invention, as well as soles containing such a polymer, dissolved.
  • Polyurethane foams in the sense of the invention include all types of polyurethane foams. Particularly preferred are flexible foams and microcellular elastomers, for example foams, such as are commonly used in shoe applications, for example as an insole, midsole or soles, or foams, such as those used in upholstery materials, for example in armguards.
  • the polyisocyanates (a) used for the preparation of the polyurethane foams according to the invention comprise the known from the prior art aliphatic, cycloaliphatic and aromatic di- or polyfunctional isocyanates (component a-1) and any mixtures thereof.
  • polymeric MDI polymeric MDI
  • tetramethylene diisocyanate tetramethylene diisocyanate
  • HDI hexamethylene diisocyanate
  • TDI tolylene diisocyanate
  • 4,4'-MDI and / or HDI is used.
  • the particularly preferred 4,4'-MDI may contain minor amounts, up to about 10% by weight, of allophanate- or uretonimine-modified polyisocyanates. It is also possible to use small amounts of polyphenylene polymethylene polyisocyanate (polymer MDI). The total amount of these high-functionality polyisocyanates should not exceed 5% by weight of the isocyanate used.
  • the polyisocyanate component (a) is preferably used in the form of polyisocyanate prepolymers.
  • These polyisocyanate prepolymers are obtainable by reacting polyisocyanates (a-1) described above, for example at temperatures of 30 to 100 ° C., preferably at about 80 ° C., with polyols (a-2) to give the prepolymer.
  • polyisocyanates (a-1) described above, for example at temperatures of 30 to 100 ° C., preferably at about 80 ° C.
  • polyols (a-2) to give the prepolymer.
  • 4,4'-MDI is preferably used together with uretonimine-modified MDI and commercial polyols based on polyesters, for example starting from adipic acid, or polyethers, for example starting from ethylene oxide or propylene oxide.
  • Ether-based prepolymers are preferably obtained by reacting polyisocyanates (a-1), more preferably 4,4'-MDI, with 2- to 3-functional polyoxypropylene and / or polyoxypropylene-polyoxyethylene polyols. They are usually prepared by the generally known base-catalyzed addition of propylene oxide alone or in admixture with ethylene oxide to H-functional, in particular OH-functional starter substances. Examples of starter substances used are water, ethylene glycol or propylene glycol or glycerol or trimethylolpropane.
  • component (a-2) polyethers can be used, as described below under (b).
  • the ethylene oxide is preferably used in an amount of 10-50% by weight, based on the total amount of alkylene oxide.
  • the incorporation of the alkylene oxides can be carried out in blocks or as a random mixture. Particularly preferred is the incorporation of an ethylene oxide end block ("EO cap") to increase the content of more reactive primary OH end groups.
  • EO cap ethylene oxide end block
  • mixtures of diols based on polyoxypropylene and polyoxypropylene-polyoxyethylene are used.
  • the hydroxyl number (OH number) of these diols is preferably between 20 and 100 mg KOH / g.
  • relatively high molecular weight compounds (b) having at least two reactive hydrogen atoms it is expedient to use those having a functionality of from 2 to 8 and an OH number of 9 to 1150 mg KOH / g.
  • Polyetherpoly- amines and / or preferably polyols selected from the group of Polyetherpolyo- Ie, polyester polyols prepared from alkanedicarboxylic acids and polyhydric alcohols, Polythioetherpolyole, polyesteramides, hydroxyl-containing polyacetals and hydroxyl-containing aliphatic polycarbonates or mixtures of at least two of said polyols.
  • polyester polyols and / or polyether polyols Preferably used polyester polyols and / or polyether polyols.
  • alkyd resins or polyester molding compounds having reactive, olefinically unsaturated double bonds are unsuitable as relatively high molecular weight compounds (b) having at least two reactive hydrogen atoms.
  • polyetherols are used.
  • Suitable polyether polyols can be prepared by known processes, for example by anionic polymerization with alkali metal hydroxides, such as sodium or potassium hydroxide, or alkali metal, such as sodium methoxide, sodium or potassium, or potassium isopropoxide as catalysts and with the addition of at least one starter molecule, the 2 to 8 reactive hydrogen atoms or prepared by Doppelmetallcyanidkatalysatoren, as described for example in EP 90444 or WO 05/090440.
  • Suitable alkylene oxides are, for example, tetrahydrofuran, 1, 3-propylene oxide, 1, 2 or 2,3-butylene oxide, styrene oxide and preferably ethylene oxide and 1, 2-propylene oxide.
  • the alkylene oxides can be used individually, alternately in succession or as mixtures.
  • Suitable starter molecules are, for example: water, polyhydric, especially dihydric to octahydric alcohols, such as ethanediol, propanediol 1, 2 and -1, 3, diethylene glycol, dipropylene glycol, butanediol 1, 4, hexanediol 1, 6, glycerol, Trimethylol propane, pentaerythritol, sorbitol and sucrose, organic dicarboxylic acids such as succinic acid, adipic acid, phthalic acid and terephthalic acid, aliphatic and aromatic, optionally N-mono-, N 1 N- and N, N'-dialkyl-substituted diamines having 1 to 4 carbon atoms in Alkyl radical, such as optionally mono- and dialkyl-substituted ethylenediamine, diethylenetriamine, triethylenetetramine, 1, 3-propylenediamine, 1, 3 or 1, 4-butylenediamine,
  • alkanolamines such as ethanolamine, diethanolamine, N-methyl- and N-ethyl-ethanolamine, N-methyl- and N-ethyl-diethanolamine and triethanolamine and ammonia.
  • polyhydric especially dihydric to hexahydric alcohols, such as ethanediol, propanediol 1, 2 and 1, 3, diethylene glycol, dipropylene glycol, butanediol 1, 4, hexanediol 1, 6, glycerol, trimethylolpropane, pentaerythritol, Sorbitol and sucrose.
  • dihydric to hexahydric alcohols such as ethanediol, propanediol 1, 2 and 1, 3, diethylene glycol, dipropylene glycol, butanediol 1, 4, hexanediol 1, 6, glycerol, trimethylolpropane, pentaerythritol, Sorbitol and sucrose.
  • the polyether polyols preferably polyoxypropylene and polyoxypropylene polyoxyethylene polyols having Etylenoxidendblocks have a functionality of preferably 2 to 4 and especially 2 and / or 3 and preferably an OH number between 12 and 155 mg KOH / g and in particular between 20 and 75 mg KOH /G.
  • polymer-modified polyols preferably polymer-modified polyesterols or polyetherols, particularly preferably graft polyether or graft polyesterols, in particular graft polyetherols.
  • This is a so-called polymer polyol, which usually has a content of, preferably thermoplastic, polymers of from 5 to 60% by weight, preferably from 10 to 55% by weight, particularly preferably from 30 to 55% by weight, and in particular 40 to 50 wt .-%, having.
  • polymer polyols are described, for example, in US Pat. No.
  • 4,342,840 and EP-A-250,351 are usually prepared by free-radical polymerization of suitable olefinic monomers, for example styrene, acrylonitrile, (meth) acrylates, (meth) acrylic acid and / or acrylamide Graft base serving polyester or polyether prepared.
  • suitable olefinic monomers for example styrene, acrylonitrile, (meth) acrylates, (meth) acrylic acid and / or acrylamide Graft base serving polyester or polyether prepared.
  • the side chains are generally formed by transferring the radicals from growing polymer chains to polyesterols or polyetherols.
  • the Po In addition to the graft copolymers, lymer polyol predominantly contains the homopolymers of the olefins dispersed in unchanged polyesterol or polyetherol.
  • the monomers used are acrylonitrile, styrene, in particular exclusively styrene.
  • the monomers are optionally in the presence of other monomers, a macromer, a moderator and using a radical initiator, usually azo or peroxide compounds, polymerized in a polyesterol or polyetherol as a continuous phase.
  • the macromers are incorporated into the copolymer chain.
  • This forms block copolymers with a polyester or polyether and a poly-acrylonitrile-styrene block which act as phase mediators in the interface of continuous phase and dispersed phase and suppress the agglomeration of the polymer polyesterol particles.
  • the proportion of macromers is usually 1 to 20% by weight, based on the total weight of the monomers used to prepare the polymer polyol.
  • the proportion of polymer polyol is greater than 5 wt .-%, based on the total weight of component (b).
  • the polymer polyols may, for example, based on the total weight of component (b) in an amount of 7 to 90
  • the polymer polyol is particularly preferably polymer polyesterol or polymer polyetherol.
  • the polyurethane foams according to the invention can be prepared without or with the concomitant use of (c) chain extenders and / or crosslinking agents.
  • chain extenders, crosslinking agents or, if appropriate, mixtures thereof can prove to be advantageous for modifying the mechanical properties, for example the hardness.
  • chain extenders and / or crosslinking agents substances having at least two isocyanate-reactive groups, such as OH or amine groups, are used. Preference is given to using diols and / or triols having molecular weights of less than 400, preferably from 60 to 300 and in particular from 60 to 150.
  • Suitable examples are aliphatic, cycloaliphatic and / or araliphatic diols having 2 to 14, preferably 2 to 10, carbon atoms, such as ethylene glycol, 1,3-propanediol, 1, 10, o, m-, p-dihydroxycyclohexane, Diethylene glycol, dipropylene glycol and preferably butanediol 1, 4, hexanediol-1, 6 and bis (2-hydroxyethyl) hydroquinone, triols such as 1, 2,4-, 1, 3,5-trihydroxy-cyclohexane, glycerol and trimethylolpropane , and low molecular weight hydroxyl-containing polyalkylene oxides based on ethylene and / or 1, 2-propylene oxide and the aforementioned diols and / or triols as starter molecules.
  • chain extenders c) monoethylene glycol, 1, 4-butanediol and / or glycerol are used. If chain extenders, crosslinking agents or mixtures thereof are used, these are expediently used in amounts of from 1 to 60% by weight, preferably from 1.5 to 50% by weight and in particular from 2 to 40% by weight, based on the weight of the components (b) and (c) are used.
  • blowing agents (d) are present in the production of polyurethane foams. These blowing agents optionally contain water (referred to as component (d-1)). In addition to water (d-1), additionally generally known chemically and / or physically active compounds can be used as blowing agent (d) (the further chemical blowing agents are used as constituent (d-2) and the physical blowing agents as constituent (d-3) ) designated).
  • Chemical blowing agents are compounds which form gaseous products by reaction with isocyanate, such as, for example, water or formic acid. Physical blowing agents are understood as compounds which are dissolved or emulsified in the starting materials of polyurethane production and evaporate under the conditions of polyurethane formation.
  • hydrocarbons for example, hydrocarbons, halogenated hydrocarbons, and other compounds, for example perfluorinated alkanes, such as perfluorohexane, chlorofluorocarbons, and ethers, esters, ketones and / or acetals, for example (cyclo) aliphatic hydrocarbons having 4 to 8 carbon atoms or hydrofluorocarbons as Solkane ® 365 mfc from Solvay.
  • the blowing agent employed is a mixture of these blowing agents containing water, in particular water as the sole blowing agent. If no water is used as the blowing agent, preferably only physical blowing agents are used.
  • the content of (d-1) water in a preferred embodiment is from 0.1 to 2 wt .-%, preferably 0.2 to 1, 5 wt .-%, particularly preferably 0.3 to 1, 2 wt. %, in particular 0.4 to 1 wt .-%, based on the total weight of the components
  • water (d-1) comprises not only water which is added as a separate component, but also water, for example in one of the components
  • microbeads containing physical blowing agent are added to the reaction of components (a), (b) and optionally (c) as additional blowing agent.
  • the microspheres may also be used in admixture with the aforementioned additional chemical blowing agents (d-2) and / or physical blowing agents (d-3).
  • microspheres usually consist of a shell of thermoplastic polymer and are filled in the core with a liquid, low-boiling substance based on alkanes.
  • a liquid, low-boiling substance based on alkanes The preparation of such microspheres is described, for example, in US Pat. No. 3,615,972.
  • the microspheres generally have a diameter of 5 to 50 on. Examples of suitable microspheres are available under the trade name Expancell® from Akzo Nobel.
  • microspheres are generally added in an amount of 0.5 to 5% based on the total weight of components (b), (c) and (d).
  • catalysts (e) for the preparation of the polyurethane foams preference is given to using compounds which greatly accelerate the reaction of the hydroxyl-containing compounds of component (b) and optionally (c) with the polyisocyanates (a).
  • amidines such as 2,3-dimethyl-3,4,5,6-tetrahydropyrimidine
  • tertiary amines such as triethylamine, tributylamine, dimethylbenzylamine, N-methyl-, N-ethyl-, N-cyclohexylmorpholine, N, N, N ', N'-tetramethylethylenediamine, N, N, N', N'-tetramethylbutanediamine, N, N, N ', N'-tetramethylhexanediamine, pentamethyldiethylenetriamine, tetramethyldiminoethyl ether, bis (dimethylaminopropyl ) urea, dimethylpiperazine
  • organic metal compounds preferably organic tin compounds such as stannous salts of organic carboxylic acids, e.g. Stannous acetate, stannous octoate, stannous ethylhexanoate and stannous laurate and the dialkyltin (IV) salts of organic carboxylic acids, e.g. Dibutyltin diacetate, dibutyltin dilaurate, dibutyltin maleate and dioctyltin diacetate; and bismuth carboxylates such as bismuth (III) neodecanoate, bismuth 2-ethylhexanoate and bismuth octanoate or mixtures thereof.
  • the organic metal compounds can be used alone or preferably in combination with strongly basic amines. When component (b) is an ester, it is preferred to use only amine catalysts.
  • Water-absorbing polymers (f) are especially polymers of (co) polymerized hydrophilic monomers such as partially neutralized acrylic acid, 2-hydroxyethyl methacrylate and 2-hydroxyethyl acrylate, graft (co) polymers of one or more hydrophilic monomers on a suitable grafting, crosslinked Cellulose or starch ethers, crosslinked carboxymethylcellulose, partially crosslinked polyalkylene oxide, partially crosslinked polyvinylpyrrolidone or Polyvinylpyr- rolidoncopolymerisaten or swellable in aqueous liquids natural products, such as guar derivatives or bentonites, water-absorbing polymers (f) based on partially neutralized acrylic acid are preferred.
  • polymerized hydrophilic monomers such as partially neutralized acrylic acid, 2-hydroxyethyl methacrylate and 2-hydroxyethyl acrylate
  • graft (co) polymers of one or more hydrophilic monomers on a suitable grafting crosslinked Cellulose or starch
  • Such polymers are used as absorbent products for the manufacture of diapers, tampons, sanitary towels and other sanitary articles, but also as water-retaining agents in agricultural horticulture.
  • the preparation of the water-absorbing polymers (f) is described, for example, in the monograph "Modern Superabsorbent Polymer Technology", FL Buchholz and AT. Graham, Wiley-VCH, 1998, or Ullmann's Encyclopedia of Industrial Chemistry, 6th Edition, Vol. 35, pages 73-103.
  • the preferred method of preparation is solution or gel polymerization. In this technology, a monomer mixture is first prepared, which is discontinuously neutralized and then transferred to a polymerization reactor, or is already presented in the polymerization reactor. In the subsequent discontinuous or continuous process, the reaction takes place to the polymer gel, which is already comminuted in the case of a stirred polymerization. The polymer gel is then dried, ground and sieved and then transferred for further surface treatment.
  • the water-absorbing polymers are obtained, for example, by polymerization of a monomer solution containing
  • Suitable ethylenically unsaturated carboxylic acids or sulfonic acids aa) include, for example, acrylic acid, methacrylic acid, maleic acid, fumaric acid, crotonic acid, 4-pentenoic acid, 2-acrylamide-2-methylpropanesulfonic acid, vinylsulfonic acid, 3-allyoxy-2-hydroxypropane-1-sulfonate and itaconic acid.
  • Particularly preferred monomers are acrylic acid and methacrylic acid. Very particular preference is given to acrylic acid.
  • 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.
  • an acrylic acid having a corresponding content of hydroquinone half-ether can be used.
  • the crosslinkers bb) are compounds having at least two polymerizable groups which can be polymerized into the polymer network in a free-radical manner.
  • Suitable crosslinkers bb) 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-A 0 547 847, EP-A 0 559 476, EP -A 0 632 068, WO 93/21237, WO 03/104299, WO 03/104300,
  • WO 03/104301 and DE-A 103 31 450 mixed acrylates which, in addition to acrylate groups, contain further ethylenically unsaturated groups, as described in DE-A 103 31 456 and WO 04/013064, or crosslinker mixtures, for example in DE-A A 195 43 368, DE-A 196 46 484, WO 90/15830 and WO 02/32962.
  • Suitable crosslinkers bb) include in particular 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
  • crosslinkers bb) are pentaerythritol di-, pentaerythritol tri- and pentaerythritol tetraallyl ethers, polyethylene glycol diallyl ether, ethylene glycol diallyl ether, glycerol di- 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 300 and 1000.
  • crosslinkers bb) are di- and triacrylates of 3 to 15 times ethoxylated glycerol, of 3 to 15 times ethoxylated trimethylolpropane, of 3 to 15 times ethoxylated trimethylolethane, especially di- and triacrylates of 2 to 6-times ethoxylated glycerol or trimethylolpropane, the 3-fold propoxylated glycerol or trimethylolpropane, and the 3-fold mixed ethoxylated or propoxylated glycerol or trimethylolpropane, 15-ethoxylated glycerol or trimethylolpropane, and the 40-times ethoxylated glycerol, trimethylolethane or trimethylolpropane ,
  • Very particularly preferred crosslinkers bb) are the polyethyleneglyoxylated and / or propoxylated glycerols esterified with acrylic acid or methacrylic acid to form di- or triacrylates, as described, for example, in WO 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.
  • Examples of ethylenically unsaturated monomers cc) copolymerizable with the monomers aa) 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 dd) can be polyvinyl alcohol, polyvinylpyrrolidone, starch, starch derivatives, polyglycols, in particular di- and trivalent polyols based on ethylene oxide and / or propylene oxide, or polyacrylic acids, preferably polyvinyl alcohol, polyglycols and starch.
  • the preferred polymerization inhibitors require dissolved oxygen for optimum performance.
  • the monomer solutions are largely freed of oxygen before the polymerization (inerting), for example by means of flowing through with an inert gas, preferably nitrogen.
  • an inert gas preferably nitrogen.
  • the polymerization inhibitors are significantly weakened in their effect.
  • the oxygen content of the monomer solution prior to the 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
  • the reaction is preferably carried out in a kneader, as described, for example, in WO 01/38402, or on a belt reactor, as described, for example, in EP-A 0 955 086.
  • the neutralization may also be carried out in part after the polymerization at the hydrogel stage. It is therefore 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 hydrogel stage.
  • 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 gel mass obtained can be further gewolfft for homogenization.
  • the neutralization of the monomer solution to the final degree of neutralization is preferred.
  • the neutralized hydrogel is then dried with a belt or drum dryer until the residual moisture content is preferably below 15 wt .-%, in particular below 10 wt .-%, wherein the water content according to the recommended by the 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.
  • 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 in any case sufficient ventilation must be ensured.
  • the solids content of the gel before drying is therefore preferably between 30 and 80% by weight.
  • Particularly advantageous is the ventilation of the dryer with nitrogen or other non-oxidizing inert gas.
  • nitrogen or other non-oxidizing inert gas it is also possible simply to lower only the partial pressure of the oxygen during the drying in order to prevent oxidative yellowing processes.
  • sufficient ventilation and removal of the water vapor also leads to an 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 being possible to use roll mills, pin mills or vibratory mills for milling.
  • the particle size of the sieved, dry hydrogel is preferably below 1000 .mu.m, more preferably below 800 .mu.m, most preferably below 600 .mu.m, and preferably above 10 .mu.m, more preferably above 50 .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).
  • the base polymers are then preferably surface postcrosslinked.
  • 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 polyglycidyl compounds, as described in EP-A 0 083 022, EP-A 0 543 303 and EP-A 0 937 736, di- or polyfunctional alcohols, such as in DE-C 33 14 019, DE-C 35 23 617 and EP-A 0 450 922, or ⁇ -hydroxyalkylamides, as described in DE-A 102 04 938 and US Pat. No.
  • 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 A 103 34 584 bicyclic amide acetals, described in EP-A 1 199 327 oxetanes and cyclic ureas and in WO 03/031482 morpholine-2,3-dione and its derivatives as suitable surface postcrosslinkers.
  • the postcrosslinking is usually carried out so that a solution of the surface postcrosslinker is sprayed onto the hydrogel or the dry base polymer powder. Following the spraying, 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.
  • the thermal drying is preferably carried out in contact dryers, more preferably paddle dryers, very particularly preferably disk dryers. Moreover, fluidized bed dryers can also be used.
  • the drying can take place in the mixer itself, by heating the jacket or blowing hot air. Also suitable is a downstream dryer, such as a hopper dryer, a rotary kiln or a heatable screw. However, it is also possible, for example, to use an azeotropic distillation as the drying process.
  • 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.
  • the capsules (g) containing latent heat storage are particles with a capsule core and a capsule wall.
  • these particles will be referred to as microcapsules.
  • Latent heat stores which can be used in the context of this invention are mentioned, for example, in DE 102004031529.
  • the capsule core contains predominantly, preferably more than 95% by weight, latent heat storage materials.
  • the capsule wall generally contains polymeric materials.
  • the capsule core is solid or liquid depending on the temperature.
  • Latent heat storage materials are generally lipophilic substances that have their solid / liquid phase transition in the temperature range of -20 to 120 ° C. In the context of this invention, however, latent heat storage materials are used which have their solid / liquid phase transition in the region just below the human body temperature. Preferably, such latent heat storage materials are used, which have their solid / liquid phase transition in the temperature range of 15 to 45 ° C, preferably from 20 to 40 ° C, in particular from 24 to 35 ° C.
  • the proportion of the latent heat storage microcapsules containing (g) is generally 0 to 30 wt .-%, preferably 1 to 20 wt .-%, more preferably 2 to 12 and in particular 3 to 8 wt .-% microcapsules (c), based on the total weight of the polyurethane foam.
  • Particularly preferred is the use of a combination of latent heat storage and water-absorbing polymer In this case, preferably 3 to 8 wt .-% latent heat storage and 1 to 10 wt .-% water-absorbing polymer used. This combination has the advantage that latent heat storage and water-absorbing polymer complement each other in influencing the microclimate on the body surface.
  • auxiliaries and / or additives (h) may also be added to the reaction mixture for the preparation of the polyurethane foams. Mention may be made, for example, of surface-active substances, foam stabilizers, cell regulators,
  • Release agents release agents, fillers, dyes, pigments, hydrolysis protectants, odor-binding substances, fungistatic and bacteriostatic substances.
  • Suitable surface-active substances are, for example, compounds which serve to assist the homogenization of the starting materials and, if appropriate, are also suitable for regulating the cell structure. Mention may be made, for example, of emulsifiers, such as the sodium salts of castor oil sulfates or of fatty acids, and salts of fatty acids with amines, for example diethylamine, diethanolamine stearate, diethanolamine of ricinoleate, salts of sulfonic acids, for example alkali metal or ammonium salts of dodecylbenzene or dinaphthylmethanedisulfonic acid and ricinoleic acid; Foam stabilizers, such as siloxane-oxalkylene copolymers and other organopolysiloxanes, ethoxylated alkylphenols, ethoxylated fatty alcohols, paraffin oils, castor oil or ricinoleic acid esters, Turkish red oil and peanut
  • oligomeric acrylates having polyoxyalkylene and fluoroalkane radicals as side groups are also suitable.
  • the surface-active sub- Punching are usually used in amounts of from 0.01 to 5 parts by weight, based on 100 parts by weight of component (b).
  • Suitable release agents are: reaction products of fatty acid esters with polyisocyanates, salts of polysiloxanes containing amino groups and fatty acids, salts of saturated or unsaturated (cyclo) aliphatic carboxylic acids having at least 8 carbon atoms and tertiary amines, and in particular internal release agents, such as Carboxylic acid esters and / or amides prepared by esterification or amidation of a mixture of montanic acid and at least one aliphatic carboxylic acid having at least 10 carbon atoms with at least difunctional alkanolamines, polyols and / or polyamines having molecular weights of 60 to 400 (EP- A-153 639), mixtures of organic amines, metal salts of stearic acid and organic mono- and / or dicarboxylic acids or their anhydrides (DE-A-3 607 447) or mixtures of an imino compound, the metal salt of a carboxylic acid and optionally a carboxylic acid (
  • Fillers are the usual conventional organic and inorganic fillers, reinforcing agents, weighting agents, agents for improving the abrasion behavior in paints, coating agents, etc., to be understood.
  • inorganic fillers such as silicate minerals, for example phyllosilicates such as antigorite, benzonite, serpentine, hornblende, amphibole, chrysotile, talc;
  • Metal oxides such as kaolin, aluminum oxides, titanium oxides, zinc oxide and iron oxides, metal salts such as chalk, barite and inorganic pigments, such as cadmium sulfide, zinc sulfide and glass, etc.
  • kaolin China Clay
  • Suitable organic fillers are, for example, carbon black, melamine, rosin, cyclopentadienyl resins and graft polymers, and cellulose fibers, polyamide, polyacrylonitrile, polyurethane,
  • Polyester fibers based on aromatic and / or aliphatic dicarboxylic acid esters and in particular carbon fibers are examples of polyester fibers.
  • the inorganic and organic fillers can be used individually or as mixtures and are advantageously added to the reaction mixture in amounts of from 0.5 to 50% by weight, preferably from 1 to 40% by weight, based on the weight of the components (a) to (c), but the content of mats, nonwovens and woven fabrics of natural and synthetic fibers can reach values up to 80% by weight.
  • odor-binding substances it is possible to use all odor-binding substances known for this purpose.
  • MOF metal organic frameworks
  • Suitable fungistatic and bacteriostatic substances may be any fungistatic and bacteriostatic substances suitable for these purposes, for example metals or metal powders such as silver, titanium, copper or zinc or materials which can liberate ions of these substances, such as silver zeolite A, quaternary ammonium compounds, polymeric compounds such as chitin and chitosan, partially crosslinked polyacrylic acid or its salts or polyhexamethylene biguanides and natural substances such as tea tree oil.
  • metals or metal powders such as silver, titanium, copper or zinc or materials which can liberate ions of these substances, such as silver zeolite A, quaternary ammonium compounds, polymeric compounds such as chitin and chitosan, partially crosslinked polyacrylic acid or its salts or polyhexamethylene biguanides and natural substances such as tea tree oil.
  • the polyisocyanates (a), higher molecular weight compounds having at least two reactive hydrogen atoms (b) and optionally chain extenders and / or crosslinking agents (c) are reacted in amounts such that the equivalence ratio of NCO groups the polyisocyanate (a) to the sum of the reactive hydrogen atoms of the components (b), (c), (d) and (e) 0.75 to 1, 25: 1, preferably 0.85 to 1, 15: 1.
  • polyurethane foams at least partially contain bound isocyanurate groups
  • a ratio of 1: 1 corresponds to an isocyanate index of 100.
  • the polyurethane foams are advantageously produced by the one-shot process, for example by the reaction injection molding, high pressure or low pressure technique in open or closed molds, for example metallic molds, e.g. made of aluminum, cast iron or steel.
  • water-absorbing polymer (f) and substantial amounts of water are brought into contact only during the preparation of the reaction mixture.
  • substantially amounts of water does not include the moisture usually contained in the higher molecular weight compound having at least two reactive hydrogens (b) or chain extenders (c) but only further additions of water, more specifically, “substantial amounts of water”. a water content of 0.1 wt .-% and more, based on the total weight of components (b) to understand (h).
  • the reaction mixture is preferably co-mixed with a polyol component (A1) and a polyol component (A2) an isocyanate component (B) containing (a) polyisocyanates.
  • the polyol components (A1) and (A2) preferably each contain a part of the minimum at least one higher molecular weight compound having at least two reactive hydrogen atoms (b), wherein the component (A1) contains no water-absorbing polymer and the component (A2) substantially no water, that is preferably less than 0.1 wt .-%, more preferably less as 0.01 wt .-% water.
  • low molecular weight chain extenders (c) When low molecular weight chain extenders (c) are used, they may be contained in the polyol component (A1) or (A2) or both.
  • the component (A2) particularly preferably contains no catalyst, in particular no amine catalyst.
  • Components (g) and (h), if present, may also be used in both component (A1) and component (A2).
  • the mixing ratios of components (b) to (h) in components (A1) and (A2) are adjusted such that the viscosities of both components are less than 50%, more preferably less than 20% and especially less than 10%, based on the viscosity of the higher-viscosity component, different.
  • the water-absorbing polymer can also be metered in as a solid in the mixing head.
  • isocyanate component, polyol component and water-absorbing polymer are added separately to the mixing head where they are mixed into the reaction mixture.
  • the starting components are mixed at a temperature of 15 to 90 ° C, preferably from 20 to 50 ° C and introduced into the open or optionally under elevated pressure in the closed mold.
  • the mixing can be carried out mechanically by means of a stirrer or a stirring screw or under high pressure in the so-called countercurrent injection method. In this case, the low-pressure processing is preferred.
  • the mold temperature is expediently 20 to 90 ° C, preferably 30 to 60 ° C and in particular 45 to 50 ° C.
  • the polyurethane foams of the invention are preferably open-celled to a large extent.
  • the components (a) to (h) are selected such that the polyurethane foam according to the invention is an open-cell foam.
  • the polyurethane foams according to the invention preferably have an open cell content of more than 90%, preferably more than 93%, particularly preferably more than 95%, in particular more than 97%.
  • the polyurethane foams produced by the process according to the invention can be used anywhere where the removal of moisture from the body surface is problematic, such as in shoes, for example as a shoe sole or as insole or footbed, in the range of helmets, in the range of straps, for example for backpacks , In the range of elbows and knee pads, insocks, the foot enclosing shoe inserts usually made of foamed material, the for absorption of shocks are suitable for ski boots and rollerblades, in seats, such as car seats, or mattresses.
  • the density of polyurethane foams can be adjusted depending on the application. Usually, the densities of polyurethane foams according to the invention are in the range from 0.05 to 1.2 g / cm 3 .
  • a density of 0.05 to 0.25 g / cm 3 for use as a shoe sole 0.1 to 0.8 g / cm 3 , preferably from 0.1 to 0 , 6 g / cm 3 .
  • polyurethane foams according to the invention are used as shoe soles, the soles of the soles are surrounded to the outside by a water-impermeable material, for example rubber. This is intended to prevent moisture from entering the foam of the invention from the outside, for example during rainfall.
  • An inventive method is easy to carry out, the dosage of 3 components in a mixing head for the preparation of reaction mixtures for the production of polyurethane foams is not a problem.
  • molded foams having complicated geometries can be obtained simply, quickly and essentially without waste products.
  • composite materials, such as shoes by direct foaming of the foam according to the invention to a carrier material, for example, the sole material to the foam according to the invention.
  • polyurethane foams are available with a high content of water-absorbing polymer.
  • the content of latent heat storage (g) due to their temperature-regulating properties to a further increase in well-being.
  • the polyurethane foams according to the invention have advantageous mechanical properties, for example a low swelling behavior. In the following, these advantageous properties are illustrated in the form of examples.
  • Polyol 1 Polyetherol based on glycerol, propylene oxide and ethylene oxide with a
  • Polyol 2 Lupranol® 4800 from Elastogran GmbH; Polymer polyetherol having a solids content of 45 wt .-% and an OH number of 20 mg KOH / g.
  • Cat 1 Tertiary amine-based catalyst dissolved in 1,4-butanediol.
  • Cat 2 Tertiary amine-based catalyst dissolved in dipropylene glycol
  • Cat 3 catalyst based on a tertiary amine
  • Stabilizer cell stabilizer based on a silicone Iso 135/74: Isocyanate prepolymer Elastogran GmbH based on 4,4'-MDI modified isocyanates and a mixture of polyetherols having an average functionality of 1, 5 to 2.0 and an NCO content of 23.8 wt .-%
  • SAP 1 Superabsorber Luquasorb® 1010 from BASF AG
  • SAP 2 Superabsorber Luquasorb® 1060 from BASF AG
  • PCM Latent heat storage Ceracap® NB 1007 X from BASF AG
  • Example 1 to 3 and Comparative Example C1 the components A1, optionally A2 and B were combined immediately before foaming and briefly but intensively mixed. The reaction mixture was then poured into a 20x20x0.5 cm plate mold and the mold was sealed. After the reaction, several samples were cut from the polyurethane plates of Examples 1 to 3 and Comparative Example C1. The specimens were conditioned at room temperature and 50% relative humidity for 24 hours and then the water vapor uptake in a climatic chamber at 40 ° C and 90% relative humidity was examined. Table 2 gives information about the water vapor absorption of the polyurethane foams: Table 2: Water vapor absorption of various polyurethane foams
  • Examples 1 to 3 show that the polyurethane foams produced have a significantly greater water vapor absorption in comparison to Comparative Example 1.
  • Machine tests were carried out on a low pressure system of Elastogran Maschinenbau (type F20).
  • the machine has three storage tanks, with components A1 and A2 contained in two containers and component B containing the third container.
  • the three different components were intimately mixed together in the mixing head and discharged into a sole mold for a footbed.
  • Table 3 shows the composition of the components used.
  • Example 4 the desorption behavior of the polyurethane foam was investigated in Example 4.
  • the sample was stored after storage for 120 minutes at 40 ° C and 90% relative humidity at room temperature and 50% relative humidity and determined at certain time intervals, the mass of the molding.
  • Table 5 gives information about the desorption behavior of the sample.

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  • Chemical Kinetics & Catalysis (AREA)
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Abstract

La présente invention concerne un procédé discontinu pour fabriquer une mousse de polyuréthane, dans lequel procédé on (a) mélange des polyisocyanates avec (b) au moins un composé de poids moléculaire plus élevé comportant au moins deux atomes d'hydrogène réactifs et (c) le cas échéant avec des agents de prolongation de chaîne et/ou de réticulation de faible poids moléculaire, (d) avec des agents gonflants contenant le cas échéant de l'eau, (e) avec des catalyseurs, (f) avec un polymère absorbant l'eau, (g) le cas échéant avec des capsules contenant un accumulateur de chaleur latente et (h) le cas échéant avec d'autres additifs, et dans lequel procédé on transforme le mélange réactionnel ainsi obtenu en mousse de polyuréthane, l'agent gonflant d) ne contenant pas d'eau ou, dans le cas où l'agent gonflant d) contiendrait de l'eau, l'agent gonflant d) et le polymère f) absorbant l'eau étant mis en contant seulement lors de la fabrication du mélange réactionnel. En outre, l'invention concerne des mousses de polyuréthane, pouvant être obtenues selon un procédé de ce type, et des semelles de chaussure contenant une telle mousse de polyuréthane.
EP07729230A 2006-05-22 2007-05-16 Semelles de chaussure avec des propriétés absorbant l'eau Withdrawn EP2027210A1 (fr)

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JP2009537683A (ja) 2009-10-29
US20090234039A1 (en) 2009-09-17
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KR20090019817A (ko) 2009-02-25
WO2007135069A1 (fr) 2007-11-29

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