JP2006255315A - Absorbent body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent body capable of easily and rapidly removing a fluid object adhering onto bodies to be contacted. <P>SOLUTION: The absorbent body 1 includes recessed parts 4 on the surface, which are fitted to the bodies 2 to be contacted. The absorbent body 1 is fitted to the bodies 2 to be contacted, so that the fluid object adhering onto the bodies 2 to be contacted are absorbed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an absorbent body that can easily and quickly remove a liquid material adhering to an object.

When removing liquids such as water adhering to an object, a method of wiping with paper, cloth, etc. is usually used, but when the surface shape of the target object (hereinafter referred to as “contacted object”) is complicated In the method of wiping with paper, cloth, etc., it was difficult to completely remove the liquid material adhering to the details. Therefore, it is often performed to remove the liquid material adhering to the details using a cotton swab provided with an absorber at the tip (see, for example, Patent Document 1).
JP-A-10-24065

  However, if there are many details on the surface of the contacted object or if you want to remove the liquid material adhering to a large number of the contacted objects, the method using a cotton swab can take a lot of time and effort to completely remove the liquid material. There was a problem of requiring.

  This invention is made | formed in view of this situation, and it aims at provision of the absorber which can remove the liquid substance adhering to a to-be-contacted body simply and rapidly.

  In order to solve the above-described problems, the present invention provides a liquid material that is provided with a concave portion and / or a convex portion to be fitted to a contacted body on the surface, is fitted to the contacted body, and adheres to the contacted body. It is related with the absorber which absorbs.

  According to the absorbent body of the present invention, it is possible to remove the liquid material adhering to the contacted body simply and quickly.

  The absorbent body of the present invention is provided with a concave portion and / or a convex portion to be fitted to the contacted body on the surface thereof, and is fitted to the contacted body to absorb the liquid material attached to the contacted body. is there. Here, the “contacted body” refers to an object to which a liquid material such as water can adhere, and specifically includes a sword mountain, a spoid, a golf ball, an egg, and the like. Further, the number of objects to be contacted is not necessarily one, and may be plural.

  Hereinafter, the absorbent body of the present invention will be described with reference to the drawings when the contacted body is a spoid, a golf ball, or Kenzan.

  FIG. 1A is a cross-sectional view showing the absorbent body 1 according to the first embodiment of the present invention, and FIG. 1B is a cross-sectional view showing the usage state of the absorbent body 1. On the surface 1a of the absorbent body 1, there are provided convex portions 3, 3, 3,... That simultaneously fit the tip portions 2a of a plurality of spoids 2, 2, 2,. It has been. The interval between the adjacent convex portions 3, 3 is appropriately set according to the interval between the tip portions 2a of the spoids 2, 2 of the automatic inspection apparatus.

  The material constituting the absorbent body of the present invention is not particularly limited as long as it has the ability to absorb liquid substances such as water, and examples thereof include polyurethane porous bodies, polyvinyl alcohol sponges, and cellulose sponges.

  Hereinafter, the gel obtained by cross-linking a urethane prepolymer aqueous dispersion having a terminal isocyanate group obtained by polymerizing a polyol, a chain extender, a hydrophilic chain extender and an isocyanate and a polyamine compound. Polyurethane porous body obtained by removing moisture from the chemical compound, wherein the porous chain lengthener is contained in an amount of 0.1 to 4% by weight in all reaction components constituting the urethane prepolymer. The case where it consists of a body is demonstrated.

  The polyol is not particularly limited as long as it is used for normal polyurethane production and has 2 or more hydroxyl groups in the molecule. For example, polyether polyol, polyester polyol, polycarbonate polyol, polylactone polyol, polyolefin polyol , Acrylic polyols, castor oil-based polyols, silicone-based polyols, and the like. These can be used alone or in admixture of two or more. Among these, polycarbonate polyol is preferably used from the viewpoint of suppressing deterioration of the resulting polyurethane porous body. The deterioration mentioned above includes deterioration due to light, deterioration due to water, and the like.

  As the polyether polyol, those obtained by polymerizing or copolymerizing alkylene oxide (ethylene oxide, propylene oxide, butylene oxide, etc.) and / or heterocyclic ether (tetrahydrofuran, etc.), specifically, polyethylene glycol, polypropylene glycol, Examples include polyethylene-polypropylene (block or random) glycol, polyethylene-tetramethylene glycol (block or random), polytetramethylene glycol, poly-2-methyltetramethylene glycol, polyhexamethylene glycol, and the like.

  Polyester polyols include aliphatic dicarboxylic acids (succinic acid, adipic acid, sebacic acid, glutaric acid, azelaic acid, etc.) and / or aromatic dicarboxylic acids (isophthalic acid, terephthalic acid, etc.) and low molecular glycols (ethylene glycol, propylene). Glycol, 1,4-butanediol, 1,6-hexanediol, 3-methyl-1,5-pentanediol, neopentyl glycol, 1,4-dihydroxymethylcyclohexane, etc.), specifically Polyethylene glycol adipate, polybutanediol adipate, polyhexanediol adipate, poly-3-methylpentanediol adipate, polyneopentyl glycol adipate, polyethylene / butylene adipate diol, polyneopentyl / hexyl adipate diol, polybutene Examples include tylene isophthalate diol.

  Examples of the polycarbonate polyol include polybutanediol carbonate, poly-3-methylpentanediol carbonate, polyhexanediol carbonate, polynonanediol carbonate, polybutanediol hexanediol carbonate, and the like.

  Examples of the polylactone polyol include polycaprolactone diol, polycaprolactone triol, and poly-3-methylvalerolactone diol.

  Examples of the polyolefin polyol include polybutadiene glycol, polyisoprene glycol or a hydride thereof.

  Silicone polyols are those in which hydroxyl groups are introduced into the polysiloxane main chain. Further, the introduced hydroxyl groups may be at both ends or one end of the polysiloxane main chain.

  The number average molecular weight of the polyol is preferably 500 to 5000, more preferably 500 to 4000, and particularly preferably 500 to 3000 from the viewpoint of forming fine continuous pores in the resulting polyurethane porous body.

  The chain extender is not particularly limited as long as it is a compound used in the production of ordinary polyurethane and has two or more hydroxyl groups in the molecule. For example, ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1, 3-butanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, neopentyl glycol, 3-methylpentanediol, nonanediol, octanediol, dimethylolheptane, glycerin, trimethylol Examples thereof include propane and 2-butyl-2-ethyl-1,3-propanediol, and these can be used alone or in admixture of two or more.

  The blending amount of the chain extender is preferably 0.1 to 10 parts by weight, more preferably 0.5 to 7 parts per 100 parts by weight of the polyol from the viewpoint of obtaining a polyurethane porous body having good product characteristics. Part by weight, particularly preferably 1 to 5 parts by weight.

  Further, as the hydrophilic chain extender, anionic chain extenders such as polyhydroxy compounds having one or more anionic hydrophilic groups (carboxyl groups or sulfone groups) in the molecule, and nonionic chain extenders such as ethylene oxide compounds And cationic chain extenders such as N-methyldiethanolamine, and these can be used alone or in admixture of two or more. Among these, anionic chain extenders are preferably used. Specifically, 2,2-dimethylol lactic acid, 2,2-dimethylol propionic acid, 2,2-dimethylol butanoic acid, 2,2-dimethylol Examples include butyric acid, 2,2-dimethylolvaleric acid, 1,4-butanediol-2-sulfonic acid, and the like. These can be used alone or in admixture of two or more.

  The blending amount of the hydrophilic chain extender depends on the polyol used and the type of isocyanate described later, but the polyurethane having fine continuous pores and the viewpoint of improving the water dispersibility of the obtained urethane prepolymer and the gelling property described later. From the viewpoint of obtaining a porous body, it is preferably 0.1 to 4% by weight, more preferably 1 to 4% by weight, and particularly preferably 1 to 3% by weight in all the reaction components constituting the urethane prepolymer. That is, when the blending amount of the hydrophilic chain extender is less than 0.1% by weight, the water dispersibility of the obtained urethane prepolymer may be extremely lowered. On the other hand, if the blending amount of the hydrophilic chain extender exceeds 4% by weight, the gelation characteristics of the resulting urethane prepolymer aqueous dispersion may be impaired.

  Isocyanates are not particularly limited as long as they are used in the production of ordinary polyurethanes and have two or more isocyanate groups at the ends. For example, 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, 4, 4 '-Diphenylmethane diisocyanate, 3,3'-dichloro-4,4'-diphenylmethane diisocyanate, 2,2'-diphenylmethane diisocyanate, 2,4'-diphenylmethane diisocyanate, xylylene diisocyanate, phenylene diisocyanate, 1,5-naphthalene diisocyanate, Aromatic polyisocyanates such as hydrogenated diphenylmethane diisocyanate and hydrogenated xylylene diisocyanate and their hydrogenated products; 1,4-cyclohexane diisocyanate, isophorone diisocyanate, norbornane diisocyanate, etc. Alicyclic polyisocyanates; tetramethylene diisocyanate, 1,6-aliphatic, such as hexamethylene diisocyanate polyisocyanate and the like, can be used alone or in combination of two or more.

  The amount of the isocyanate blended is not particularly limited as long as the end of the urethane prepolymer obtained has an isocyanate group, and it reacts quantitatively with the active hydrogen groups of the polyol, chain length agent and hydrophilic chain length agent. What is necessary is just to mix | blend.

  The urethane prepolymer can be produced by a known method and is not particularly limited. For example, in the presence or absence of an organic solvent not containing an active hydrogen group in the molecule, a polyol, a chain extender, and a hydrophilic The method etc. which make a reactive chain length agent and an isocyanate react by 20 to 150 degreeC by the one shot method or a multistage method, More preferably at 60 to 120 degreeC for 2 to 10 hours, etc. are mentioned. Here, the addition order of each component is not specifically limited. The reaction end point is preferably monitored by viscosity.

  The organic solvent is used from the viewpoint of lowering the viscosity during the production of the urethane prepolymer, and examples thereof include acetone, methyl ethyl ketone, N-methylpyrrolidone, toluene, tetrahydrofuran, dioxane, N, N′-dimethylformamide and the like.

  The urethane prepolymer aqueous dispersion is obtained by dispersing the urethane prepolymer in water, and the blending ratio of the urethane prepolymer with respect to water is preferably 5 from the viewpoint of controlling the apparent density of the resulting polyurethane porous body. -60% by weight, more preferably 10-50% by weight, particularly preferably 15-40% by weight.

  The method for producing the urethane prepolymer aqueous dispersion is not particularly limited, and examples thereof include a method of mixing and dispersing the urethane prepolymer and water using a dispersion apparatus such as a disper mixer, a homomixer, or a homogenizer. It is done.

  Here, when an anionic chain extender is used as the hydrophilic chain extender, from the viewpoint of improving the water dispersibility of the urethane prepolymer, the anionic hydrophilic group of the hydrophilic chain extender constituting the urethane prepolymer in advance is neutralized. It may be harmonized. Examples of such neutralizing agents include lower alkyl amines such as trimethylamine, triethylamine, tri-n-propylamine, tri-n-butylamine; and inorganic neutralizing agents such as ammonia. Among these, trimethylamine and triethylamine having a boiling point lower than that of water are preferably used from the viewpoint that they are easily removed by a water removal step described later.

  The blending amount of the neutralizing agent is not particularly limited, but it is usually preferable to blend approximately the same amount as the anionic hydrophilic group of the hydrophilic chain extender.

  Furthermore, from the viewpoint of improving the water dispersibility of the urethane prepolymer, a surfactant may be appropriately used. Examples of the surfactant that can be used include higher alcohol ethylene oxide adducts (polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, etc.), higher alcohol propylene oxide adducts, and the like. , Higher alcohol (ethylene oxide-propylene oxide) adduct, alkylphenol ethylene oxide adduct (polyoxyethylene nonylphenyl ether, polyoxyethylene octylphenyl ether, etc.), arylphenol ethylene oxide adduct, fatty acid ethylene oxide adduct, fatty acid polyethylene Glycol ester, fatty acid amide ethylene oxide adduct, long chain alkylamine ethylene oxide adduct, many Alcohol fatty acid ester ethylene oxide adduct, oil and fat ethylene oxide adduct, glycerin fatty acid ester, polyglyceride, pentaerythritol fatty acid ester, sorbitol fatty acid ester (sorbitan ester), sorbitan ester ethylene oxide adduct, sucrose fatty acid ester, polyhydric alcohol Nonionic surfactants such as alkyl ethers and fatty acid amides of alkanolamines; Anionic surfactants such as alkyl ether sulfates, alkylbenzene sulfonates, dialkyl ester salts of sulfosuccinic acid; Cationic interfaces such as quaternary alkyl ammonium salts An activator etc. are mentioned, These can be used individually or in mixture of 2 or more types. Among these, a nonionic surfactant having an HLB value of 6 to 20 is preferable from the viewpoint of improving the water dispersibility of the urethane prepolymer and efficiently performing the water washing step described later.

  The compounding amount of the surfactant is preferably 0.1 to 20% by weight, more preferably 1 to 10% by weight, and particularly preferably 2 to 5% by weight with respect to the urethane prepolymer.

  As a method for producing an aqueous urethane prepolymer dispersion in the case where a surfactant is blended, for example, 1) A urethane prepolymer mixed with a surfactant and water are used in the same manner as described above using a dispersing device such as a homomixer. Examples of the dispersion method include 2) a method in which an aqueous solution containing a urethane prepolymer and a surfactant is dispersed using a dispersion apparatus such as a homomixer in the same manner as described above.

  As said polyamine compound, it has 2 or more hydrogen atoms in a molecule which can react with the isocyanate group of urethane prepolymer aqueous dispersion (it contains 2 or more primary and / or secondary amino groups in 1 molecule). If it is a thing, it will not specifically limit, For example, ethylenediamine, propylenediamine, 1,3-diaminopentane, 1,5-diaminopentane, tetramethylenediamine, hexamethylenediamine, 1,7-diaminoheptane, 1,5-diamino -2-methylpentane, 3,3'-diaminodipropylamine, 3,3'-methyliminobispropylamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, polyethylenediamine, N, N'- Bisaminopropyl-1,3-propylenediamine, N, N'-bisaminopropyl-1,4-butylene 1, 2-bis (2-aminoethoxy) ethane, 1,2-bis (3-aminopropoxy) ethane, 1,4-bis (3-aminopropoxy) butane, 2-hydroxylaminopropylamine, bis- Aliphatic polyamines such as (3-aminopropyl) ether, 1,3-bis- (3-aminopropoxy) -2,2-dimethylpropane; 1,4-diaminocyclohexane, 4,4'-diaminodicyclohexylmethane, isophorone Alicyclic polyamines such as diamine and norbornanediamine; aromatic polyamines such as 4,4'-diaminodiphenylmethane; hydrazines such as hydrazine hydrate; piperazine, 2-methylpiperazine, 2,5-dimethylpiperazine, 2-aminomethyl Heterocycles such as piperazine, homopiperazine, 4-aminomethylpiperidine, (3R)-(+)-3-aminopyrrolidine, (3S)-(-)-3-aminopyrrolidine The recited may be used singly or in combination of two or more.

  In addition, as the polyamine compound, polyoxyalkyleneamines such as α, ω-diaminopolypropylene oxide, trimethylolpropane or glycerin propylene oxide adduct, and a polyamine end product having a terminal amino group can also be used. Those having a molecular weight of 230 to 2000 are preferred, and those having a molecular weight of 480 to 5000 are preferably used in the latter.

  As the compounding amount of the polyamine compound, from the viewpoint of obtaining a polyurethane porous body having good product characteristics, the active isocyanate group (theoretical value before water dispersion) of the urethane prepolymer aqueous dispersion and the active hydrogen group of the polyamine compound are The equivalent ratio is preferably 0.1 to 90%, more preferably 1 to 50%, and particularly preferably 5 to 30%.

  As a method for producing a polyurethane porous body, for example, the urethane prepolymer aqueous dispersion obtained above and a polyamine compound are uniformly mixed, and an odd-shaped mold having substantially the same shape as the contacted body, A method in which the obtained mixture is poured into a container on which a contacted body is placed, and a crosslinking reaction is allowed to proceed at room temperature for 10 hours or more to remove moisture from the gelled product. . As another production method, a mixture of a urethane prepolymer aqueous dispersion and a polyamine compound is poured into a predetermined container and allowed to stand for about 30 seconds, and then a contacted object is inserted into the mixture in the container at room temperature. Examples thereof include a method of allowing the crosslinking reaction to proceed in a state of standing for more than an hour and removing moisture from the obtained gelled product.

  The viscosity of the mixture of the urethane prepolymer aqueous dispersion and the polyamine compound at the time of pouring into the odd-shaped mold or container is 6000 from the viewpoint of obtaining an absorber having a shape faithfully corresponding to the inner shape of the odd-shaped mold or container. It is preferably (mPa · s / 25 ° C.) or less, more preferably 5 to 4000 (mPa · s / 25 ° C.). The material of the atypical mold and the container to be used is not particularly limited, and examples thereof include polyethylene, polypropylene, and polystyrene. Further, when molding the polyurethane porous body, a mold release agent such as silicone may be appropriately applied to the odd-shaped mold or the like in advance from the viewpoint of improving the mold release property.

  In the polyurethane porous body, the colorant, the antibacterial agent, the antioxidant, the ultraviolet absorber, the light stabilizer, the antifoaming agent, the leveling agent, the thickener, and the pH adjustment are within the range not impairing the object of the present invention. An additive such as an agent may be contained, and these can be added alone or in admixture of two or more.

  Moreover, when the neutralizing agent is added in the urethane prepolymer aqueous dispersion in which an anionic chain length agent is contained as a structural component as a hydrophilic chain length agent, the deterioration of the resulting polyurethane porous body is suppressed. From the viewpoint, the urethane prepolymer may be cross-linked by adding a compound capable of reacting with the anionic hydrophilic group of the anionic chain extender. Examples of such compounds include carbodiimide compounds, oxazoline compounds, epoxy compounds, melamine compounds, and the like. Moreover, when the said compound is added, since the neutralizing agent which had formed a salt with an anionic hydrophilic group dissociates from an anionic chain length agent, the water washing process mentioned later can be performed efficiently.

  In the production of the polyurethane porous body described above, since the terminal isocyanate group of the urethane prepolymer in the urethane prepolymer aqueous dispersion reacts with the water present around it, usually after the urethane prepolymer is dispersed in water, It is preferable to react with the polyamine compound within 48 hours.

  As the water removal method, natural drying may be performed at room temperature, but it is usually preferable to dry at 70 ° C. or higher using a hot air dryer or the like in order to shorten the water removal time. When the resulting gelled product contains a neutralizer, surfactant, antifoaming agent, thickener, pH adjuster, etc., before the drying step, for example, a washing machine, etc. It is preferable to use and wash these components with water.

  The polyurethane porous body thus obtained has fine continuous pores and has excellent water absorption.

  Next, the usage method of the absorber 1 is demonstrated. In the automatic inspection apparatus, a reagent is put into a sample tube simultaneously from a plurality of bound spoids 2, 2, 2,..., And after the reagent is put, as shown in FIG. Reagent L remains in 2a. If the reagent L remains at the tip 2a of each spoid 2 in this way, the humidity in the analyzer may increase and affect the measurement result, and it is necessary to remove the reagent L quickly. Therefore, as shown in FIG. 1 (b), the protrusions 3 provided on the surface 1a of the absorber 1 are fitted from below the respective spoids 2 so that the reagent L attached to the tip 2a of the spoid 2 can be removed. The absorbent body 1 absorbs the protrusion 3. Thus, by using the absorber 1, the reagent L adhering to the tip portions 2a of the plurality of spoids 2 can be removed at once by a simple operation.

  FIG. 2 is a view showing another embodiment of the absorbent body 1 shown in FIG. In this embodiment, on the surface 1a of the absorbent body 1, concave portions 4, 4, which are simultaneously externally fitted to the distal end portions 2a of a plurality of spoids 2, 2, 2,. 4 is provided. The interval between the adjacent recesses 4 and 4 is appropriately set according to the interval between the tip portions 2a of the spoids 2 and 2 of the automatic inspection apparatus. Also in this embodiment, the reagent L adhering to the tip portions 2a of a plurality of spoids 2 can be removed at a stretch by a simple operation of fitting the concave portion 4 provided on the surface 1a of the absorber 1 from below each spoid 2. Can be removed. In addition, since the spoids 2, 2, 2... Are bound together, it is difficult to remove the reagent adhering to the outer surface of the tip 2a because the adjacent spoid 2 becomes an obstacle. By using the reagent, it is also possible to remove the reagent attached to the outer surface of the distal end portions 2a of the plurality of spoids 2 that are bound at a stretch by a simple operation.

  FIG. 3 is a cross-sectional view showing an absorbent body 5 according to the second embodiment of the present invention. The surface 5a of the absorbent body 5 has a reverse shape of the lower hemisphere portion 6a of the golf ball 6 that is a contacted body, and is provided with a plurality of hemispherical recesses 7 that are externally fitted to the lower hemisphere portion 6a. In golf courses or the like, when it is desired to remove rainwater or the like adhering to the surface of a large amount of golf balls, the golf ball 6 is fitted into the plurality of hemispherical recesses 7 of the absorber 5 so that the golf ball 6 can be easily and quickly fitted. It is possible to remove liquid substances such as rainwater adhering to the lower hemisphere portion 6a of the golf ball 6. Further, by rotating the golf ball 6 in the hemispherical concave portion 7, it is possible to remove liquid substances such as rainwater adhering to the upper hemispherical portion of the golf ball 6. The absorber 5 can also be used as a storage case for the golf ball 6.

  FIG. 4A is an external perspective view showing the absorbent body 8 according to the third embodiment of the present invention and the sword mountain 9 that is a contacted body, and FIG. 4B shows the usage state of the absorbent body 8. It is sectional drawing. The sword mountain 9 is formed of a base 9a and a needle ridge 9b composed of a plurality of needles provided so as to protrude upward from the base 9a. And the surface 8a of the absorber 8 is made into the reverse shape of the surface shape of the base 9a and the needle peak 9b, and the recessed part 10 fitted to the base 9a and the needle peak 9b is provided. As shown in the figure, since the needle ridge 9b is formed with a plurality of needles densely formed on the base 9a, especially when a liquid material such as water adheres to the sword ridge 9, it particularly adheres to the upper surface of the base 9a and the surface of the needle ridge 9b. It was difficult to remove the liquid material because the adjacent needle was an obstacle. Therefore, as shown in FIG. 4B, it is possible to remove water adhering to the surface of the sword mountain 9 simply and quickly by fitting the absorber 8 to the sword mountain 9 to which a liquid material such as water is attached. It is.

  The absorbent body of the present invention can also be used as an applicator for applying a surface treatment agent to a contacted body. Examples of the surface treatment agent include chemicals such as rust preventives, water repellents, mold release agents, lubricants and cleaning agents; chemical solutions such as acidic solutions, alkaline solutions and alcohols; inks; paints; waxes and the like. Examples of the application method include a method of impregnating the absorbent body of the present invention with a surface treatment agent in advance and then fitting the absorbent body to a contacted body. As described above, by using the absorbent body of the present invention, even when there are many details on the surface of the contacted body or when there are a plurality of contacted bodies, the surface of the contacted body can be simply and quickly. It is possible to apply the surface treatment agent uniformly.

  EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to the following examples.

  Polycarbonate diol [manufactured by Asahi Kasei Co., Ltd., trade name: T-4671, number average molecular weight: 1000] as a polyol, ethylene glycol as a chain length agent, 2,2-dimethylol as a hydrophilic chain length agent in a three-neck round bottom flask 1,6-hexamethylene diisocyanate was added as propionic acid and isocyanate in the mixing ratio shown in Table 1, and the mixture was stirred at 90 ° C. for 3 hours to obtain a urethane prepolymer.

  The urethane prepolymer obtained above was heated to 80 ° C., triethylamine was added as a neutralizing agent, and the mixture was stirred for 2 minutes. Next, a polyoxyethylene alkyl ether type nonionic surfactant (manufactured by Asahi Denka Kogyo Co., Ltd., trade name: Adecatol TN-100, HLB: 13.8, cloud point: 75 ° C.) was added as a surfactant, and the mixture was further stirred for 2 minutes. went.

  Next, the urethane prepolymer to which the neutralizing agent and the surfactant were added was added to distilled water, and the mixture was stirred with a homomixer for 5 minutes to obtain a urethane prepolymer aqueous dispersion.

  An aqueous solution containing ethylenediamine as a polyamine compound was added to the urethane prepolymer aqueous dispersion obtained above while stirring, and the mixture was mixed with a stirrer at room temperature for 10 seconds. Was poured into a polyethylene container) and allowed to react at room temperature for 12 hours. Next, the reaction product demolded from the mold was washed with water and dried at 80 ° C., and as shown in FIG. An absorber was obtained. Table 1 shows the blending ratio of each component. Moreover, the viscosity of the mixture at the time of pouring into a shaping | molding die was measured with the B-type viscosity meter (BM format) [made by Tokimec Co., Ltd.]. This result is also shown in Table 1.

  As shown in Table 1, the viscosity of the mixture of the urethane prepolymer aqueous dispersion and the polyamine compound at the time of pouring into the mold was 100 (mPa · s / 25 ° C) and had excellent fluidity. Even with the molding die having the complicated shape as described above, an absorbent body having a shape faithfully corresponding to the inner shape of the molding die was obtained.

  A sword mountain wet with water was fitted into the recess of the absorbent body obtained in Example 1 and Example 2, and immediately removed. Then, the water adhering to the top surface of the sword mountain and the surface of the needle mountain was removed. From this, it can be said that it is possible to remove water adhering to Kenzan easily and quickly by using the absorber obtained in Example 1 and Example 2, and in Examples 1 and 2, The obtained absorber was found to have excellent water absorption. Further, these absorbers had excellent water absorption even after continuous use about 50 times, depending on the wetness of Kenzan as the contacted body. In addition, it cannot be overemphasized that these absorbers can be used again by making it dry.

  Moreover, the absorber obtained in Example 1 and Example 2 was observed at a magnification of 600 times using a digital microscope [manufactured by Keyence Corporation, model number: VH-6300]. An observation photograph of Example 1 is shown in FIG.

  As shown in FIG. 5, the absorber obtained in Example 1 had fine continuous pores. Further, the absorbent obtained in Example 2 was also observed to have fine continuous pores as in Example 1.

(A) is sectional drawing which shows the absorber which concerns on 1st Embodiment of this invention, (b) is sectional drawing which shows the use condition of the absorber shown to (a). It is a figure which shows another embodiment of the absorber shown in FIG. It is sectional drawing which shows the absorber which concerns on 2nd Embodiment of this invention. (A) is an external appearance perspective view which shows the absorber which concerns on 3rd Embodiment of this invention, (b) is sectional drawing which shows the use condition of the absorber shown to (a). 2 is a microscope photograph (magnification: 600 times) of the absorber obtained in Example 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Absorber 2 Spoid 3 Convex part 4 Concave part 5 Absorber 6 Golf ball 7 Hemispherical concave part 8 Absorber 9 Kenzan 10 Concave part

Claims (4)

The surface is provided with a recess and / or a protrusion that fits into the contacted body,
An absorber that is fitted to the contacted body and absorbs a liquid material attached to the contacted body.   The absorbent body according to claim 1, wherein a concave portion and / or a convex portion for simultaneously fitting a plurality of the contacted bodies are provided.   The absorbent body according to claim 1 or 2, comprising a polyurethane porous body. The polyurethane porous body was obtained by cross-linking a urethane prepolymer aqueous dispersion having a terminal isocyanate group obtained by polymerizing a polyol, a chain length agent, a hydrophilic chain length agent and an isocyanate, and a polyamine compound. It is obtained by removing moisture from the gelled product,
The absorbent according to claim 3, wherein the hydrophilic chain extender is contained in an amount of 0.1 to 4% by weight in all reaction components constituting the urethane prepolymer.

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