WO1999003577A1 - Composition absorbante, son procede de production, et article absorbant - Google Patents

Composition absorbante, son procede de production, et article absorbant Download PDF

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Publication number
WO1999003577A1
WO1999003577A1 PCT/JP1998/003231 JP9803231W WO9903577A1 WO 1999003577 A1 WO1999003577 A1 WO 1999003577A1 JP 9803231 W JP9803231 W JP 9803231W WO 9903577 A1 WO9903577 A1 WO 9903577A1
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WO
WIPO (PCT)
Prior art keywords
absorbent
water
absorbent composition
resin
filler
Prior art date
Application number
PCT/JP1998/003231
Other languages
English (en)
Japanese (ja)
Inventor
Hitoshi Takai
Tsuyoshi Yuki
Shingo Mukaida
Daisuke Tagawa
Kenji Tanaka
Original Assignee
Sanyo Chemical Industries, Ltd.
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 Sanyo Chemical Industries, Ltd. filed Critical Sanyo Chemical Industries, Ltd.
Priority to AU82440/98A priority Critical patent/AU739387B2/en
Priority to DE19882553T priority patent/DE19882553T1/de
Publication of WO1999003577A1 publication Critical patent/WO1999003577A1/fr
Priority to US09/484,457 priority patent/US6284362B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28026—Particles within, immobilised, dispersed, entrapped in or on a matrix, e.g. a resin
    • 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
    • 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
    • A61L15/18—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing inorganic materials
    • 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
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/24—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/26—Synthetic macromolecular compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28004—Sorbent size or size distribution, e.g. particle size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28011—Other properties, e.g. density, crush strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28033—Membrane, sheet, cloth, pad, lamellar or mat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J20/28057—Surface area, e.g. B.E.T specific surface area
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15203—Properties of the article, e.g. stiffness or absorbency
    • A61F2013/15284—Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties

Definitions

  • the present invention relates to an absorbent composition, a method for producing the same, and an absorbent article.
  • an absorbent composition in which a microfilament is incorporated in a water-absorbent resin to improve the surface area and the absorption rate associated therewith; an absorbent composition in which the absorption rate to blood and the water retention are further improved;
  • the absorption rate of the water-absorbing resin is influenced by its surface area. That is, in the case of the particulate water-absorbing resin having a constant mass, the larger the particle size of the particles, the smaller the surface area and the smaller the area in contact with water. Conversely, as the particle size becomes smaller, the surface ⁇ ⁇ ⁇ becomes larger, so that the absorption rate becomes faster. However, if the particle size is too small, when the water-absorbent resin comes into contact with water, a phenomenon occurs in which the fine particles associate with each other via water (a phenomenon called “mamako”). Speed slows down.
  • the methods (1) to (4) show that, when the liquid to be absorbed is a low-viscosity liquid such as urine or salt water, a certain effect of improving the flute is recognized, but the manufacturing and quality aspects are as follows. It was not always satisfactory.
  • the water-absorbent resin obtained by the method (1) has too fine particles, when it is mixed with fibrous materials such as pulp to be used as an absorbent and applied to paper diapers etc., it is said that the fine particles will be released from the fibrous materials. There's a problem. Furthermore, the water-absorbent resin obtained by the method 1 is treated with a surfactant or a water-soluble polymer, so that the powder fluidity deteriorates and fine particles cause dust generation. May cause environmental degradation problems.
  • the amino group-containing azo compound is decomposed to generate nitrogen gas, and at the same time, radicals are generated. Therefore, the absorption performance is reduced due to a decrease in the molecular weight of the water-absorbing resin, and water-soluble components are not used. The problem arises of the increase of.
  • the effect of improving the absorption rate becomes insufficient if the bond strength of the binder is increased. Conversely, if the adhesive force of the binder is weakened, the mechanical strength of the granulated material is weakened, and the granulation is broken by mechanical shear and mechanical friction in the powder feeder and the powder transfer process by wind pressure. This causes a problem of returning to the original fine particles.
  • the blood when blood is used as the liquid to be absorbed, the blood is highly viscous and contains high molecular organic components such as blood cells, hemoglobin, cytoplasm, and protein components. Did not give good results.
  • the method (1) can improve the blood absorption rate to some extent, it has a drawback that the absorption capacity and the water retention are reduced because a large amount of salts of inorganic or organic acids must be added.
  • the absorption capacity for the blood coat is improved to some extent, the absorption rate of blood is not always a satisfactory level.
  • the absorption performance with respect to physiological saline is excellent, the absorption capacity with respect to blood is as low as 6 to 11 times, and the absorption rate is not always at a satisfactory level.
  • a first object of the present invention is to provide an absorbent composition comprising a water-absorbent resin having an improved surface area and an accompanying improved absorption rate.
  • a second object of the present invention is to provide an absorbent composition in which the problems in the above methods (1) to (4) have been improved.
  • a third object of the present invention is to provide an absorbent composition having improved absorption capacity for blood and improved water retention and absorption speed.
  • a fourth object of the present invention is to provide an absorbent article using such an absorbent composition. Disclosure of the invention
  • the present invention relates to the following absorbent composition [1] [2]; a method for producing the absorbent composition [3; ⁇ [ Five ]; And absorbent articles [6].
  • Absorbent resin (A) and before the drying step to produce a hydrogel polymer Te ⁇ , true density of less than 0. 1 g / cm a particle size of 1 ⁇ 200 ⁇ M micro filler (B1) This is a method for producing an absorbent composition in which is incorporated and dried.
  • a heat-expandable hollow filler ( ⁇ 2 ') with a particle size of 1 to 15 O ⁇ m is built in and dried by heating.
  • This is a method for producing an absorbent composition in which a fine filler ( ⁇ 2) obtained by thermally expanding ( ⁇ 2 ') is incorporated in a water-absorbent resin ( ⁇ ).
  • An absorbent article comprising the absorbent composition according to the above [1] or [2] and an absorbent layer comprising a fibrous material, which is wrapped in a surface protective sheet having a water-permeable portion.
  • water-absorbent resin (II) in the absorbent composition [1] of the present invention include the following water-absorbent resins. Also, in addition to 1, the following water-absorbent resins 1 to 4 can be exemplified.
  • B a water-absorbent resin obtained by polymerizing and, if necessary, hydrolyzing a water-insoluble water-swellable polymer having a crosslinked structure and / or a graft structure;
  • a particulate polysaccharide is crosslinked to form a water-insoluble, water-swellable structure (for example, water-soluble polysaccharide such as guar gum, xanthan gum, cellulose, methylcellulose, ethylcellulose, carboxymethylcellulose, or a modified product thereof). Particles obtained by surface cross-linking using a polyfunctional cross-linking agent);
  • Water-soluble radically polymerizable monomers are polymerized and, if necessary, thermally cross-linked in the presence of a cross-linking agent to form a water-insoluble, water-swellable polymer (for example, acrylamide and acrylic acid. (Salt) And a copolymer obtained by heating the copolymer.
  • a cross-linking agent for example, acrylamide and acrylic acid.
  • the water-soluble radically polymerizable monomer (al) of the monomer (a) is, for example, a water-soluble monomer having an acid grave such as a carboxylic acid group, a sulfonic acid group, or a phosphate group.
  • Water-soluble radical polymerizable monomer having all acid groups (all); nonionic water-soluble radical polymerizable monomer (al3); I can do it.
  • examples of the radically polymerizable water-soluble monomer having a carboxylic acid group include unsaturated mono- or polycarboxylic acids [(meth) acrylic acid (acrylic acid and / or methacrylic acid. Use the same description), crotonic acid, sorbic acid, maleic acid, itaconic acid, cinnamic acid, salts thereof, etc., and their anhydrides [non-maleic acid, etc.].
  • examples of the radically polymerizable water-soluble monomer having a sulfonic acid group include fatty acids or aromatic vinylsulfonic acids (vinylsulfonic acid, arylsulfonic acid, vinyltoluenesulfonic acid, styrenesulfonic acid, etc.) , (Meth) acrylalkyl sulfonic acid, [(meth) acrylic acid sulphoethyl, (meth) acrylic acid sulphob pill), (meth) acrylamide alkyl sulfonic acid [2-acrylamide 2-methylpropanesulfone Acid and the like], and salts thereof.
  • the radically polymerizable water-soluble monomer having a phosphate group includes, for example, (meth) acrylic acid hydroxyalkyl phosphate monoester [2-hydroxyshethyl (meth) acryloyl phosphate, , Phenyl-2-ethylacryloxyethyl phosphate, etc.].
  • Examples of the kind of the salt in (a12) include an alkali metal salt, an ammonium salt, an amine salt and the like, and preferably an alkali metal salt, particularly a sodium salt.
  • nonionic water-soluble radically polymerizable monomer (al3) examples include (meth) acrylamide, vinyl vinylidone, 2-hydroxyethyl (meth) acrylate, and the like.
  • the radically polymerizable monomers (a 2) which become water-soluble by hydrolysis include (meth) acrylonitrile, (meth) acrylic acid lower alkyl esters (alkyl groups having a carbon number of 1 4), maleic acid lower alkyl esters (1 to 4 carbon atoms in the alkyl group), vinyl acetate, and the like.
  • the monomer (a) two or more of those exemplified above may be used in combination.
  • the degree of neutralization of the acid group in the resin is preferably 50 to 90 mol%, particularly preferably 60 to 80 mol%. Mol%. This neutralization may be performed at the stage of the monomer before the polymerization, or may be performed after the polymerization.
  • crosslinking agent (b1) examples include a bridging agent having two or more ethylenic unsaturated groups (b11), a crosslinking agent having at least one ethylenically unsaturated group and at least one reactive functional group (b12), Crosslinking agents (bl3) having two or more reactive functional groups are exemplified.
  • cross-linking agent (b ll) examples include N, N, -methylenebis (meth) acrylate, ethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, and glycerol.
  • examples include phosphorus (di or tri) acrylate, trimethylpropane triacrylate, triallylamine, triallyl cyanurate, triallyl cisyanurate, tetraaryloxyphene, and pentaerythritol triallyl ether.
  • crosslinking agent (bl2) examples include glycidyl (meth) acrylate, N-meth (Meth) acrylamide.
  • crosslinking agent (bl3) examples include ethylene glycol, diethylene glycol, glycerin, propylene glycol, diethanolamine, trimethyl propylpropane, polyethyleneimine, ethylene glycol diglycidyl ether, and 'glycerol diglycidyl. Ether and polyglyceryl polyglycidyl ether.
  • crosslinking agents Two or more of these crosslinking agents may be used in combination.
  • preferred crosslinking agents (b11) are N, N'-methylenebisacrylamide, ethyleneglycoldiacrylate, trimethylolpropanetriacrylate, and tetraaryloxy. , Pentaerythritol triallyl ether and triarylamine.
  • graft base (b2) examples include water-soluble polysaccharides such as starch, guar gum, xanthan gum, cellulose, methylcellulose, ethylcellulose, cellulose dimethylcellulose, and modified products thereof, polyvinyl alcohol, and polyester resins. And the like.
  • This water-absorbent resin (A) forms at least one multifunctional compound (b) selected from the group consisting of a crosslinking agent (bl) and a graft base (b2) in order to form a crosslinked structure and / or a graft structure. ) Is used.
  • the amount of the agent used for forming the crosslinked structure is usually 0.0015% based on the total mass of the monomer (a) and the agent (bl), and is preferably 0.001%. , 0.05 to 2%, more preferably 0.1 to 1%.
  • the amount of the cross-linking agent (bl) is less than 0.001%, it becomes a sol when absorbing water, the water absorbing ability, which is a function of the water-absorbing resin, is reduced, and when it comes into contact with the aqueous liquid, And the apparent absorption rate is reduced. Also, the drying property is very poor and the productivity is inefficient. On the other hand, if it exceeds 5%, on the other hand, the crosslinking becomes too strong and does not exhibit sufficient water absorption / water retention capacity.
  • the amount of the graft base (b2) used for forming the graft structure does not usually exceed 30 based on the total mass of the monomer, the crosslinking agent (bl) and the graft base (b2). Amount, preferably 0.1 to 20% by mass, more preferably 1 to 10% by mass. % By mass.
  • the water-absorbing resin (1) include a saponified starch-acrylonitrile copolymer, a cross-linked starch-acrylate copolymer, a cross-linked polyacrylate, and (meth) acrylic acid.
  • Examples include crosslinked acrylamide copolymers, crosslinked polyacrylamides and hydrolysates thereof, crosslinked polyvinyl vinylidone, and crosslinked cellulose derivatives.
  • the water-absorbing resin (A) are those which can absorb and hold a large amount of liquid due to ionic osmotic pressure, and have a salt of a carboxyl group and / or a lipoxyl group with little water separation even when a load or external force is applied. It is a water-absorbing resin containing a polymerizable monomer as a main component, and more preferably a crosslinked product of a starch-acrylate copolymer and a crosslinked product of a polyacrylate.
  • the salt type and the degree of neutralization are preferably alkali metal salts, more preferably sodium salts and potassium salts.
  • the degree of neutralization with respect to the acid groups is preferably 50 to 90 mol%, more preferably 60 to 80 mol%.
  • water-absorbing resin (1) various additives, chain transfer agents (for example, thiol compounds, etc.) and surfactants are added to the polymerization system for polymerizing the monomer (a) and the polyfunctional compound (b) as necessary. It cannot be added even if an agent is added.
  • chain transfer agents for example, thiol compounds, etc.
  • surfactants are added to the polymerization system for polymerizing the monomer (a) and the polyfunctional compound (b) as necessary. It cannot be added even if an agent is added.
  • the polymerization method for producing the water-absorbent resin (A) is not particularly limited, and examples thereof include an aqueous solution polymerization method, an opaque polymerization method, a reversed-phase turbidity polymerization method, a spray S synthesis method, a photopolymerization method, and a radiation polymerization method.
  • a preferred polymerization method is a method of performing aqueous solution polymerization using a radical polymerization initiator.
  • the type of radical polymerization initiator and the radical polymerization conditions are not particularly limited, and may be as usual.
  • the absorbent composition [1] of the present invention is an absorbent composition having a structure in which a fine filler (B) is incorporated in a water-absorbent resin (A). ⁇
  • the fine filler ( ⁇ ) examples include a fine filler (B1) having a true density of 0.1 lg / cm 3 or less and a particle size of 1 to 20 O / m and a heat filler having a particle size of 1 to 150 / m.
  • a fine filler ( ⁇ ⁇ 2) formed by thermally expanding an expandable hollow filler ( ⁇ 2 '). Both the small filler (B1) and the small filler ( ⁇ 2) are water-absorbent resin ( ⁇ ) in any ratio. It may be built inside.
  • the true density of the micro filler (B1) usually 0. lg / cm 3 or less, preferably 0. 0 8 g / cm a, particularly preferably 0. 01 ⁇ 0 ⁇ 06 g / cm 3 .
  • True density is a value measured by, for example, ACCUPYC 1330 PYCNOMETER.
  • An example of a specific measurement operation is as follows.
  • PYCNOMETER has two chambers (chambers) connected by pulp, cell chamber and expansion chamber, and their volumes are indicated by V (c) and V (e).
  • V (c) the volume of this sample is V
  • P (e) the volume of this sample is V
  • P (1) The pressure of the expansion chamber at that time is P (a).
  • P (2) the pulp connected to the expansion chamber is sealed, and the pressure P (2) distributed to both chambers is measured.
  • the sample volume is obtained from the volume and pressure of each chamber before and after opening the pulp, and the true density is calculated by the following equation.
  • the particle size of (B1) is usually 1 to 200 m, preferably 1 to 50 m, and more preferably 5 to 100 m.
  • the particle size of (B) is larger than 200, the uniformity of blending (B) with the hydrogel of (A) in the production method [3] of the present invention is poor, and the resulting absorbent composition is obtained. This is not preferred because the effect of improving the absorption rate of the water may be poor.
  • it is smaller than 1 m when (B1) is mixed with the hydrogel of (A), aggregation of the (B1) is likely to occur, resulting in poor uniformity.
  • the material of (B1) is not particularly limited, and may be either organic or inorganic.
  • organic materials include polyethylene, polypropylene, polystyrene, and polystyrene.
  • thermoplastic polyurethane polyethylene oxide, polypropylene oxide, polytetramethylene oxide, polyacetal, and cellulose derivatives. Those obtained by copolymerizing two or more monomers constituting these resins are also included.
  • inorganic materials include silicon oxide, aluminum oxide, iron oxide, titanium oxide, magnesium oxide, zirconium oxide, and the like.
  • organic materials preferred are polyacrylate, polymethacrylate, polyvinylidene chloride, polyacetate biel, and polyacrylonitrile.
  • the shape of (B1) is not particularly limited, hollow, 6 favored correct shape such as porous and the like are hollow.
  • fine filler (B1) in the present invention include, for example, Matsumoto Microsphere F—50E manufactured by Matsumoto Yushi Co., Ltd., and Expanscel 551 DE and 46 manufactured by Nippon Ferrite Co., Ltd. 1 DE, 09 I DE, etc. These may be used in combination of two or more.
  • (B2) is a thermally expandable hollow filler (B2 ') having a particle size of 1 to 15 mm2. Is a minute filler that is thermally expanded.
  • heat-expandable hollow filler ( ⁇ 2 ′) examples include a fine hollow resin containing a gas or a volatile compound in a void.
  • Examples of the type of resin that forms the outer wall in this minute hollow resin include polyethylene, polypropylene, polystyrene, poly-xylylene, polyacrylate, polymethacrylate, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, and polyvinyl acetate.
  • Examples thereof include lenoxide, polytetramethylene glycol, polyacetal, and the like, and examples include those obtained by copolymerizing two or more monomers constituting these resins. These may be used in combination of two or more.
  • polyacrylate polyvinylidene chloride
  • polyacrylonitrile preferred are polyacrylonitrile.
  • the expansion start temperature of ( ⁇ 2 ') can be variously changed depending on the softening temperature of the resin forming the outer wall, the type of gas present in the voids, and the type of the volatile compound, but is preferably 60 to 1 50 ° C., while the maximum expansion temperature is preferably 80-180. C. More preferably, the expansion start temperature is 70 to 120. C, the maximum expansion temperature is 90 ⁇ 150.
  • the expansion start temperature is lower than 60 ° C., in the production method of the present invention, it may be necessary to cool the hydrogel, which is inefficient.
  • the expansion start temperature is higher than 150 ° C., in the production method [4] of the present invention, in the heating and drying step, the evaporation of the water in the hydrogel state (A) precedes.
  • the swelling efficiency may decrease because the flexibility of the hydrogel may be reduced.
  • the maximum expansion temperature is less than 80 ° C. or more than 18 (TC)
  • the same phenomenon as described above may occur, which is not preferable.
  • the boiling point at normal pressure is 150. It is a compound having a boiling point of not more than C, preferably not more than 120 ° C, more preferably not more than 100 ° C. Boiling point is 150. If it is larger than C, in the production method of the present invention, the thermal expansion start temperature of (B 2) becomes high, and heat treatment must be performed at a high temperature, which is inefficient. Further, the thermal expansion may be insufficient, and the effect of improving the absorption rate of the obtained absorbent composition may be poor.
  • Examples of the gas or volatile compound contained in the voids of ( ⁇ 2 ') include isoptan, isopentane, petroleum ether, ⁇ -butane, ⁇ -pentane, n- ⁇ xane, cyclopentane, and cyclohexane. Trifluoromethane, dichlorofluoromethane, butylene, methylene chloride and the like. These may be used in combination of two or more.
  • isobutane isopentane
  • n-butane n-pentane
  • petroleum It is ether.
  • the particle size of ( ⁇ 2 ′) is not particularly limited, but is usually 1 to 150 ⁇ , preferably 1 to 100 / zm or less.
  • the particle size of (2,) is larger than 150 m or smaller than 1 m, in the production method [4] of the present invention, the uniformity of blending of ( ⁇ 2 ') into the hydrogel of (A) is improved. And the effect of improving the absorption rate of the obtained absorbent composition may be poor, which is not preferable.
  • the volume expansion ratio of ( ⁇ 2 ′) is preferably 1 ° or more, particularly preferably 30 times or more. If the volume expansion ratio of ( ⁇ 2 ′) is less than 10, the expansion rate of ( ⁇ ) is low, and the effect of improving the absorption rate of the obtained absorbent composition may be poor.
  • heat-expandable hollow filler ( ⁇ 2 ′) in the present invention include Matsumoto Microspheres F-20, F-30, F-40, F-50, F-80S manufactured by Matsumoto Yushi Seiyaku Co., Ltd. , F-82, F-85, F-100, F-30VS, F-80GS, F-80VS, F-100SS, F-1300, F-1400, etc .; and Expansel 820 manufactured by Nippon Ferrite Co., Ltd. , 642, 551, 461, 051, 091, and the like, and two or more of these may be used in combination.
  • the mass ratio of (A) to (B) is preferably 100: (0.05 to 10), more preferably 100: (0.1 to 7), and Is 100: (0.5 ⁇ 5).
  • (B) is less than 0.05, the effect of improving the absorption rate is poor.
  • it exceeds 10 the absorption rate can be improved, but the volume increase becomes so large that the mechanical properties of the resulting absorbent composition particles are reduced. In this case, the mechanical strength tends to be weak, and the effect of improving the absorption rate of the resulting absorbent composition under pressure tends to be poor.
  • the absorbent composition [1] of the present invention can be obtained, for example, by a production method [3] using a microfilament (B1) or a production method [4] using a heat-expandable hollow filler ( ⁇ 2 ⁇ ).
  • the fine filler (B1) is incorporated and dried before drying in the step of producing the water-absorbent resin (A) via the hydrogel polymer to obtain an absorbent composition.
  • An embodiment of the production method [3] includes a method of drying a hydrogel of the water-absorbing resin (A) containing the microfilament (B1) to obtain an absorbent composition.
  • This embodiment is a case where the water-absorbent resin (A) is formed before drying, but other forms include a drying step or a drying step or after drying, a thermal crosslinking method or a surface crosslinking method. Thus, a water-absorbing resin can be formed.
  • the fine filler (B1) is blended at any stage from before the polymerization of the water-absorbent resin (A) to before the drying.
  • a preferred method is to add and knead the (A) hydrogel polymer in a stage after polymerization to before drying. This is because the addition of (B1) to (A) in the hydrogel state improves the absorption rate because (B1) is contained inside the water-absorbing resin particles.
  • (B1) can be added in any form of powder, water slurry, and water dispersion.However, in order to enhance the uniformity and the effect of improving the absorption rate of the obtained absorbent composition, water slurry or water It is preferable to add as a dispersion liquid and uniformly add it to the hydrogel.
  • the water content of the blend of the hydrogel (A) and (B1) is preferably 2 to 10 times the solid content of (A). If it is less than twice, the uniformity at the time of mixing will be low, and the effect of improving the absorption rate of the obtained absorbent composition may be poor. If it is higher than 10 times, it takes a long time to dry, which is not economical.
  • a conventionally known apparatus can be used as a kneading apparatus for blending (B1) with (A) in a hydrogel state and uniformly dispersing the same.
  • a conventionally known apparatus can be used.
  • the device include a double-armed kneader, an internal mixer (bread palry mixer), a self-cleaning mixer, a gear compounder, a screw-type extruder, a screw-type kneader, and a mincing machine. These can be used in combination of two or more.
  • the drying temperature of the hydrogel formulation containing (B1) is usually from 60 to 230. C, preferably 100-200. C, especially 105-180. C. Drying temperature is 60. If it is less than C, it takes a very long time to dry and is not economical, whereas 230. C If the amount exceeds the above range, side reactions or decomposition of the resin may occur, leading to a decrease in absorption performance and absorption speed.
  • the device for drying the blend of (A) and (B1) in the hydrogel state may be a conventional device, such as a drum dryer, a parallel flow bread dryer (tunnel dryer), a ventilation band dryer, and a jet flow. (Nozzle jet) Dryer, box type hot air dryer, infrared dryer, etc.
  • the heat source is not particularly limited. These dryers can be used in combination of two or more.
  • the surface of the absorbent composition particles incorporating (B1) is coated with a functional group capable of reacting with acid groups such as lipoxyl graves and Z or its base.
  • a functional group capable of reacting with acid groups such as lipoxyl graves and Z or its base.
  • Such a surface cross-linked type absorbent composition is suitable for the present invention because it has excellent absorption performance and absorption rate under normal pressure as well as under load, and also has a high gel strength.
  • cross-linking agent used for the surface chair examples include polyglycidyl ether compounds (ethylene glycol diglycidyl ether, glycerin-1,3-diglycidyl ether, glycerin triglycidyl ether, polyethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, Polyol compounds (glycerin, ethylene glycol, polyethylene glycol, etc.); polyamine compounds (ethylene diamine, diethylene triamine, etc.); polyamine resins (boriamide polyamine ebichlorhydrin resin, polyamine ebik D) Hydrin resin), alkylene carbonate, aziridine compound, polyimine compound and the like.
  • the amount of the cross-linking agent in the surface cross-linking is not particularly limited because it can be variously changed depending on the type of the cross-linking agent, cross-linking conditions, target performance, and the like. However, the amount is usually 0.0 with respect to the absorbent composition.
  • the content is 0.1 to 3% by mass, preferably 0.01 to 2% by mass, and more preferably 0.05 to 1% by mass.
  • the amount of the crosslinking agent is less than 0.001% by mass, there is no great difference in performance from the water-absorbing resin not subjected to the Jie treatment. On the other hand, over 3% by mass If so, the absorption capacity and water retention tend to decrease, which is not preferable.
  • a blend of (A) and (B1) in a hydrogel form may be used as an additive, as a brightener, a residual monomer reducing agent (eg, sodium sulfite, hydrogen peroxide, etc.), an antibacterial agent (eg, Quaternary ammonium salt compounds, chlorhexidine compounds, metal salt antibacterial agents, etc.), preservatives, fragrances, deodorants, coloring agents, antioxidants, silica, zeolite and the like.
  • a residual monomer reducing agent eg, sodium sulfite, hydrogen peroxide, etc.
  • an antibacterial agent eg, Quaternary ammonium salt compounds, chlorhexidine compounds, metal salt antibacterial agents, etc.
  • preservatives eg, Quaternary ammonium salt compounds, chlorhexidine compounds, metal salt antibacterial agents, etc.
  • fragrances eg, Quaternary ammonium salt compounds, chlorhexidine compounds, metal salt antibacterial agents, etc.
  • a heat-expandable hollow filler ( ⁇ 2 ') is incorporated and heated and dried before drying in the process of producing the water-absorbent resin (A) via the hydrogel polymer.
  • This is a method for obtaining an absorbent composition in which a microfilament ( ⁇ 2) formed by thermally expanding ( ⁇ 2 ') in an aqueous resin ( ⁇ ) is incorporated.
  • the water-containing gel of the water-absorbent resin ( ⁇ ) containing the heat-expandable hollow filler ( ⁇ 2 ′) is heated and dried, and the above-mentioned fine filler is contained in the water-absorbent resin ( ⁇ ).
  • ( ⁇ 2 ′) is combined before polymerization of the water-absorbent resin ( ⁇ ), that is, in any stage from the step of adjusting the mixing of the raw materials for polymerization to the step of drying.
  • the mixture is added to the hydrogel polymer in the stage from the stage of mounting (i) to before drying, and the mixture is scoured. This is because ( ⁇ ) in the hydrogel state has an appropriate flexibility to expand, and can be expanded in volume by heating in the subsequent drying step to increase the surface area.
  • ( ⁇ ) when ( ⁇ ) is blended with the hydrogel polymer in the stage from the polymerization of ( ⁇ ) to before drying, a more uniform mixture can be obtained by using a crosslinking agent (for example, a polyglycidyl ether compound) together. Volumetric expansion Inflation can take place.
  • a crosslinking agent for example, a polyglycidyl ether compound
  • ( ⁇ 2 ′) can be added in any form of powder, water slurry, or water dispersion, but is required to promote uniform expansion and the effect of improving the absorption rate of the resulting absorbent composition. Is preferably added in the form of a water slurry or a water dispersion and uniformly added to the hydrogel.
  • the water content of the blend of the water-containing gel of (II) and ( ⁇ 2 ′) is preferably 2 to 10 times the solid content of (II). If it is less than 2 times, the expansion ratio will be low, and the effect of improving the absorption rate of the obtained absorbent composition may be poor. If it is higher than 10 times, the drying time becomes longer and it is uneconomical.
  • (B) is mixed with ( ⁇ ) in the production method [3] of the present invention exemplified above.
  • the same kneading device as used for uniform dispersion can be used.
  • Heat drying temperature (B2 ') hydrogel formulations with added is usually sixty to two hundred thirty ° C, preferably 100 to 200 e C, in particular 105 to: L 80. C. If the drying temperature is below 60 ° C, drying takes a very long time and is not economical, whereas 230. If it exceeds C, side reactions or decomposition of the resin may occur, leading to a decrease in absorption performance and absorption speed.
  • the device for heating and drying the mixture of (A) and ( ⁇ 2 ') in the form of a hydrogel may be a conventional device, such as a drum dryer, a parallel flow band dryer (tunnel dryer), a ventilation band dryer, Jet flow (nozzle jet) Dryers, box-type hot air dryers, infrared dryers, etc.
  • a direct-fired heat source is not preferable, but for a non-combustible compound, the heat source is not particularly limited.
  • These dryers can be used in combination of two or more.
  • the surface of the absorbent composition particles obtained by pulverization and particle size adjustment is surfaced with a crosslinking agent having at least two functional groups capable of reacting with a carboxylic acid group and / or its base.
  • the absorbent composition of the present invention can be crosslinked.
  • Such a surface cross-linked type absorbent composition is excellent in absorption performance and absorption speed under normal pressure as well as under gravity, and also has a high gel strength, and is therefore preferred for the present invention. Suitable.
  • cross-linking agent to be used for the surface cross-linking the same one as in the case of the surface cross-linking in the production method [5] of the present invention can be used, and the amount used is also the same.
  • additives or thickeners may be used, such as residual monomer inhibitors (eg, sodium sulfite, hydrogen peroxide, etc.), antibacterial agents ( For example, quaternary ammonium salt compounds, chlorhexidine compounds, metal salt antibacterial agents, etc.), preservatives, fragrances, deodorants, coloring agents, antioxidants, silica, zeolites, etc. it can.
  • residual monomer inhibitors eg, sodium sulfite, hydrogen peroxide, etc.
  • antibacterial agents For example, quaternary ammonium salt compounds, chlorhexidine compounds, metal salt antibacterial agents, etc.
  • preservatives e.g, quaternary ammonium salt compounds, chlorhexidine compounds, metal salt antibacterial agents, etc.
  • fragrances e.g, quaternary ammonium salt compounds, chlorhexidine compounds, metal salt antibacterial agents, etc.
  • preservatives e.g., quaternary ammonium salt compounds, chlorhexidine compounds, metal
  • the preferred shape of the absorbent composition [1] of the present invention is particulate, for example, crushed particles obtained by polymerizing an aqueous solution and then drying and pulverizing, or a reverse phase turbidity polymerization method. May be obtained.
  • the average particle size of the absorbent composition [1] of the present invention is usually from 200 to 600 m, preferably from 250 to 550 Aim.
  • the particle size distribution is usually 1000 ⁇ !
  • the content in the range from 100 to 100 / m is 90% by mass or more, preferably 95% by mass or more.
  • the average particle size exceeds 600 m or coarse particles exceeding 1000 m exist in excess of 10% by mass, the absorption rate tends to decrease.
  • fine particles having an average particle diameter of less than 200 m or less than 100 Aim are present in an amount of more than 10% by mass, problems such as a reduction in powder handling properties and a quantitative supply property by a sprayer, and generation of dust are caused. In many cases, the problem of deteriorating the work environment may occur.
  • the absorbent composition [1] of the present invention is characterized in that the specific surface area is improved by 10% or more as compared with (A) in which (B) is not incorporated.
  • the specific surface area is a value measured by the BET method. Therefore, the specific surface area of (A) in which (B) is not incorporated is compared with the value measured by the BET method.
  • the value measured by the T method is improved by 10% or more.
  • the specific surface area of the absorbent composition [1] of the present invention having a particle size of 150 to 500 m was 0.1 lm 2 / g or more, particularly 0.15 m 2 / g or more, as measured by the BET method. Preferably, there is.
  • the bulk density of the absorbent composition [1] of the present invention is usually 0.1 to 0.7 g / cm 3 , preferably 0.1 to 0.55 g cm 3 , particularly 0.2 to 0.5 g / cm 3 . cm 3.
  • the bulk density is a value measured based on JISK 3362.
  • the absorbent composition [1] of the present invention has an improved specific surface area as described above, the absorption rate of physiological saline ( ⁇ ) without ( ⁇ ) is not incorporated ( The absorption rate is improved with respect to the absorption time, and the degree of improvement in the absorption rate is preferably 80% or less in time.
  • the absorption rate of physiological saline (absolute time of absorption of a certain amount) of (1), in which ( ⁇ ) is not incorporated, is compared with the absorption rate of physiological saline of absorbent composition [1] of the present invention (constant). Is preferably reduced to 80% or less.
  • the absorbent rate of the physiological saline solution of the absorbent composition [1] of the present invention is preferably 25 seconds or less, particularly 20 seconds or less. With such an absorbent rate, it can be used for sanitary articles such as disposable diapers. In this case, it is effective to improve dry feeling and reduce leakage.
  • the absorbent composition [1] of the present invention obtained by surface cross-linking has an improved absorption capacity under pressure and an absorption rate to physiological saline of preferably 25 seconds or less, particularly preferably 20 seconds or less.
  • the absorption under pressure of 20 g / cm 2 for physiological saline can be preferably 25 g / g or more, especially 28 gZg or more.
  • the absorbent composition [2] of the present invention is obtained by further adding a surfactant (C) to the surface of the absorbent composition [1:].
  • the shape and particle size distribution, specific surface area, bulk density, and other physical properties of the absorbent composition [2] of the present invention are basically the same as those of the absorbent composition [1]. The characteristic of fast absorption is maintained.
  • the type of surfactant (C) is not particularly limited, and any of nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants can be used.
  • nonionic surfactants include alkylphenols, aliphatic alcohols, carboxylic acids, aliphatic amines, fatty acid amides, ethylenoxide and active hydrogen-containing compounds such as polyphenylene-modified or amine-modified polysiloxanes.
  • non-ionic surfactant The following are specific examples of the non-ionic surfactant.
  • anionic surfactants include alkali metal salts of (C8-C24) -alkyl sulfonic acids, alkali metal salts of (C8-C24) -alkyl sulfates or Real alkanoammonium salts, sulfosuccinic acid diesters, sulfosuccinic acid monoesters, (C8 C24) -alkylarylsulfonic acids, alkylphenols, and sulfuric acid half-esters of products obtained by adding ethylene oxide to aliphatic alcohols, etc. No. These anionic surfactants can be used in combination of two or more, and can also be used in combination with the above-mentioned nonionic surfactants.
  • cationic surfactant examples include salts of inorganic acids (such as hydrochloric acid) and salts of organic acids (such as acetic acid and citrate) of higher aliphatic amines (such as laurylamine and stearylamine) and higher fatty acids such as lower amines.
  • inorganic acids such as hydrochloric acid
  • organic acids such as acetic acid and citrate
  • higher aliphatic amines such as laurylamine and stearylamine
  • higher fatty acids such as lower amines.
  • Steparic acid, oleic acid, etc. Solomin A-type quatin surfactant, Sapamin A-type quatin surfactant, Quaternary ammonium salt having long-chain (C10-C22) alkyl (Long-chain alkyl benzyl dimethyl ammonium chloride) And the like, and an inorganic acid or an organic acid salt of an alkylene oxide (such as ethylene oxide) adduct of an aliphatic amine.
  • the amphoteric surfactant include a compound having at least one cationic group (for example, a quaternary ammonium group) and an anionic group (for example, a carboxylate group or a sulfate group) in the same molecule. Specific examples include dimethylcarboxydimethyl-fatty acid monoalkylamide ammonium quinones, and 3- (3-fatty acid amide doped lovir) dimethylammonium 2-hydroxyhydropropanesulfonates.
  • nonionic surfactants having an HLB (Griffin) of 3 or more, especially 8-14.
  • HLB is an indicator indicating the balance between hydrophilicity and lipophilicity of a surfactant, and can be controlled by the type and number of functional groups, or the number of moles and molecular weight of alkylene oxide added.
  • a surfactant (C) is further added to the surface of the absorbent composition [1] obtained by the production method described in the above item [3] or [4]. It is obtained by doing.
  • the amount of the surfactant (C) is usually 0.1 to 5%, preferably 0.1 to 3%, particularly 0.2 to 2%, based on the quality of the absorbent composition [1]. .
  • the content of the fleas of (C) is less than 0.1%, the treatment effect of (C) is poor, and almost no improvement in the affinity between the obtained composition and blood can be expected. Things may not be obtained.
  • the amount of (C) exceeds 5%, it is effective for improving the absorption rate. However, the powder flowability of the resulting composition deteriorates, which may cause problems in powder handling properties, which is not preferred.
  • the surfactant (C) By applying the surfactant (C) to the surface of the absorbent composition [1], the surfactant (C) adheres to the surface, and if the surfactant has permeability, it penetrates into the interior of the composition. .
  • the method of adding the surfactant (C) to the absorbent composition [1] is not particularly limited.
  • the surfactant (C) is mixed with the absorbent composition using a normal mixing device.
  • the surfactant (C) may be as such or diluted in water or an aqueous liquid.
  • Examples of specific equipment include a V-type mixer, a repump blender, a turbula mixer, a universal mixer, a Nauta mixer, a fluidized bed mixer, a spray mixer, a line blender, a continuous mixer, and a panbury. Mixer, mortar mixer and the like. These can be used in combination of two or more. [Absorption rate for sheep blood]
  • composition [2] of the present invention has an absorption rate to sheep blood of usually 30 seconds or less, preferably 25 seconds or less, and a water retention g after swelling in sheep blood for 30 minutes is usually 20 g /. g or more, preferably 23 g / g or more.
  • composition [2] of the present invention has such a balance of absorption characteristics (absorption rate and water retention) for blood, it can be used for various absorbent articles (for example, sanitary napkins, panty liners, tampons, surgery) Underpads, puerperal mats, dressings for wound protection, etc.), especially when applied to sanitary napkins, improves the dryness of the surface, reduces leakage, and increases water retention compared to conventional water-absorbent resins. It is a target.
  • composition [2] of the present invention When the composition [2] of the present invention is surface-crosslinked, the amount of absorption under a load against sheep blood is further improved, and the absorption ⁇ under a load of 20 g / cm 2 is reduced to 20 g. It is possible to make Z g or more.
  • artificial blood eg, about 0.9% sodium chloride, about 0.4% sodium bicarbonate, about 30% glycerin, about 30% carboxylate, Methylcell mouth sodium (about 0.18%, aqueous solution containing surfactants and coloring agents as needed) has been used, but the absorption behavior by this simulated blood and actual blood (human blood) have been used. , Bovine blood, bovine blood, sheep blood, etc.), it is necessary to use actual blood to determine the absorption performance for blood.
  • the absorbent article of the present invention comprises an absorbent layer comprising the absorbent composition [1] or [2] of the present invention and a fibrous material wrapped in a surface protective sheet having a water-permeable portion.
  • the surface protection sheet usually consists of a water-impermeable sheet on the outer surface and a water-permeable sheet on the inner surface, depending on the form of use.
  • the absorbent layer is wrapped between the two sheets, and the ends of the two sheets are joined to form a water absorbent article. If necessary, a water-absorbing paper, a liquid diffusion sheet and the like are used together with the absorbing layer between the two sheets.
  • the fibrous material used in the absorbent layer includes pulp, synthetic fiber, semi-synthetic fiber, natural fiber and the like, and is not particularly limited.
  • the thickness and length of the fibrous material are not particularly limited.
  • the measurement was carried out by BET one-point method using a device manufactured by Cyuasa Ionics Inc. (Canleeve QS-19).
  • the water-absorbent resin or absorbent sample used for the measurement was adjusted to 30 to 100 mesh in advance.
  • a beaker (100 ml capacity) containing 50 g of 0.9% sodium chloride solution in a magnet (08 mm in diameter at the center, 7 mm in diameter at both ends, 30 mm in length, medium size coated with fluororesin) And place the beaker on the center of the magnetic stirrer.
  • the time when the vortex disappeared and the liquid level became horizontal was defined as the end point, and the time required for the end point was measured in seconds to determine the absorption rate.
  • Absorbent composition sample adjusted to a particle size of 30 to 60 mesh with a JIS standard screen in a cylindrical plastic tube (inner diameter 30 mm> height 60 mm) with a 250 mesh nylon net attached to the bottom 0.1 'Add 0 g and level.
  • a weight having an outer diameter of 30 mm is placed on the absorbent composition so as to give a load of 20 g / cm 2 .
  • a plastic tube containing the absorbent composition is placed in a petri dish (diameter ⁇ 12 cm) containing 60 ml of 0.9% by mass saline solution with the nylon mesh side facing down. The g of the absorbent composition increased by absorbing 0.9% saline was measured after 5 minutes and 60 minutes.
  • the 10-fold value of the measured value after 5 minutes was defined as the initial pressure absorption g in 0.9% saline, and the 10-fold value of the measured value after 60 minutes was defined as the pressure absorption amount in 0.9% saline solution.
  • a tea bag (length 20 cm, width 10 cm) made of 250 mesh nylon net, 1.0 g of an absorbent composition sample adjusted to a particle size of 30 to 60 mesh with a JIS standard sieve was put into sheep blood. After immersion for 30 minutes to absorb and swell, suspend by ice for 15 minutes, dehydrate with a centrifugal dehydrator at 250 G for 2 minutes, and measure the increase. This increased weight was defined as water retention for sheep blood.
  • a fluff pulp layer having a basis weight of 100 g / m 2 is cut into a size of 6 cm x 15 cm, and 0.4 g of a sample of the absorbent composition is uniformly sprayed thereon. Furthermore, a fluff pulp layer of the same tsubo g and the same size is piled up and pressed on a wire mesh at 10 kgZcm 2 for 30 seconds to form an absorber layer.
  • a leak-proof film larger than the absorber eyebrows is placed on the lower surface, and a rayon nonwoven fabric is placed on the upper surface, and the periphery is heat-sealed along the absorber layer to create a model napkin.
  • the absorption rate measurement After the absorption rate measurement, the area where the sheep blood was absorbed and spread in the absorber layer was determined, and the average value of the three measurements was taken as the diffusion area.
  • a 1 liter glass reaction vessel was charged with 77 g of sodium acrylate, 22.8 g of acrylic acid, 0.2 g of N, N, monomethylenebisacrylamide and 295 g of deionized water, stirred, mixed and mixed. While maintaining the temperature of the contents at 3'C.
  • the hydrogel polymer (A1G) is shredded to a size of 3 to 7 mm with an internal mixer, and then is passed through a ventilated pan drier at 150 ° C and a wind speed of 2.0 m / sec. It was dry. The obtained dried product was pulverized and adjusted to a particle size of 20 to 100 mesh to obtain a water-absorbent resin (A1).
  • Table 1 shows the results of measuring the specific surface area of the water-absorbent resin (A1) and the absorbent composition (1), and calculating the rate of increase in the specific surface area.
  • Table 2 shows the performance evaluation results of the absorbent composition (1).
  • Table 1 shows the results of measuring the specific surface area of the water absorbent resin (A2) and the absorbent composition (2), and calculating the rate of increase in the specific surface area.
  • Table 2 shows the performance evaluation results of the absorbent composition (2).
  • Example 1 100 g of the dried product having a particle size of 20 to 100 mesh obtained in the same manner as in Example 1 except that the addition of the dispersion liquid (B11) in Example 1 was changed to 25 g or 250 g, Surface cross-linking was performed in the same manner as in Example 1 to obtain an absorbent composition (3) and an absorbent composition (4).
  • Table 1 shows the results of calculating the rate of increase of the specific surface area with respect to.
  • Table 2 shows the performance evaluation results of the absorbent compositions (3) and (4).
  • Example 1 the following dispersion layer (B12) or (B12) was used instead of the dispersion liquid (B11).
  • Example 2 Except that 13)-was used in the same manner as in Example 1, and the surface was crosslinked in the same manner as in Example 2 to obtain an absorbent composition (5) and an absorbent composition (6).
  • Table 1 shows the results of measuring the specific surface area of the absorbent compositions (5) and (6) and calculating the rate of increase of the specific surface area with respect to the water-absorbent resin (A2).
  • Table 2 shows the performance evaluation results of the absorbent compositions (5) and (6).
  • a 1-liter glass reaction vessel was charged with 77 g of sodium acrylate: 22.8 g of acrylic acid, 0.2 g of ⁇ , ⁇ '-methylenebisacrylamide and 293 g of deionized water, and stirred. While mixing, 2 g of Expanscel 09 IDEj was added to keep the contents at a temperature of 3.
  • the hydrogel polymer composition (AB1G) was chopped with an internal mixer, and then dried with a ventilated pan drier at 150 ° C and a wind speed of 2.0 m / sec.
  • the obtained dried product was pulverized and adjusted to a mesh size of 20 to 100 meshes, and 100 g of this product was stirred at a high speed while a 10% water / methanol mixed solution of ethylene glycol diglycidyl ether (permanent / 2 g of methanol (70/30) was added and mixed, followed by heat crosslinking at 140 for 30 minutes to obtain a surface-crosslinkable absorbent composition (7).
  • Table 1 shows the results obtained by measuring the specific surface area of the absorbent composition (7) and calculating the increase rate of the specific surface area with respect to the water absorbent resin (A2).
  • Table 2 shows the performance evaluation results of the absorbent composition (7). (Example 8)
  • a 1 liter glass reaction vessel was charged with 81.8 g of acrylic acid, 0.2 g of N, N, -methyl bis (acrylamide) and 241 g of deionized water, and the contents were stirred and mixed. Temperature was kept at 3 eC .
  • This hydrogel polymer was shredded with an internal mixer, and 109.1 g of a 30% aqueous sodium hydroxide solution was added and kneaded, whereby the hydrogel was neutralized with 72 mol% of the carboxylic acid.
  • a polymer (A3G) was obtained.
  • Example 2 The same 2% aqueous dispersion (BID 100 g) as in Example 1 was added to the hydrogel polymer (A3G), and the mixture was uniformly mixed using an internal mixer. It dried with the ventilation type band dryer of the conditions.
  • the hydrogel polymer (A3G) was uniformly mixed with an internal mixer, and then dried with a ventilated band dryer at 150 ° C and a wind speed of 2. Om / sec.
  • the obtained dried product was pulverized and adjusted to a particle size of 20 to 100 mesh.
  • a surface-Ji bridge type water-absorbent resin (A3) was obtained.
  • Example 1 The water absorbent resin (A1) obtained in Example 1 was used as a comparative absorbent composition (cl), and the performance evaluation results are shown in Table 2.
  • the water absorbent resin (A2) obtained in Example 2 was used as a comparative absorbent composition (c2), and the performance evaluation results are shown in Table 2.
  • Example 1 100 g of a dried product having a particle size of 20 to 100 mesh obtained in the same manner as in Example 1 except that the amount of the dispersion liquid (B11) added was changed to 2 g or 600 g in Example 1, Surface cross-linking was performed in the same manner as in Example 2 to obtain a comparative absorbent composition (c3) and a comparative absorbent composition (c4).
  • Table 1 shows the results obtained by measuring the specific surface ⁇ of the comparative absorbent compositions (c 3) and (c 4) and calculating the rate of increase of the specific surface area with respect to the water-absorbent resin (A 2).
  • Table 2 shows the performance evaluation results of the comparative absorbent compositions (c3) and (c4).
  • Example 5 100 g of a dried product having a particle size of 20 to 100 mesh obtained in the same manner as in Example 1 except that the same amount of the following dispersion liquid (B14) is used in place of the dispersion liquid (B11) in Example 1 was subjected to surface crosslinking in the same manner as in Example 2 to obtain a comparative absorbent composition (c5).
  • Table 1 shows the results of measuring the specific surface area of the comparative absorbent composition (c5) and calculating the rate of increase of the specific surface area with respect to the water absorbent resin (A2).
  • Table 2 shows the performance evaluation results of the comparative absorbent composition (C5).
  • BU 2% aqueous dispersion of Mazumoto Mike D-Sfair-1 MF L80 QTA (true density: 0.2 g / cm3; particle size: 20 m, manufactured by Matsumoto Yushi Jie Co., Ltd.).
  • the hydrogel polymer (A1G) obtained in Example 1 was shredded to a size of 3 to 7 mm with an internal mixer, and then thermally decomposed foaming agent “Vinihole AZ-S” (decomposition) Temperature 100.
  • C main component: azobisisobutyronitrile, manufactured by Eiwa Kasei Kogyo Co., Ltd.) was added at 2% based on the solid content of (A 1 G), and then uniformly mixed with an internal mixer. Ventilation band drying at 150 ° C, wind speed 2. Om / sec 31
  • Table 1 shows the results of measuring the specific surface area of the comparative absorbent composition (c6) and calculating the rate of increase of the specific surface area with respect to the water absorbent resin (A2).
  • Table 2 shows the performance evaluation results of the comparative absorbent composition (c6).
  • a hydrogel polymer (A 1 G) was obtained in the same manner as in Example 1.
  • Table 3 shows the results of measuring the specific surface area of the absorbent composition (9) and measuring the rate of increase of the specific surface area with respect to the water-absorbent resin (A1).
  • Table 4 shows the performance evaluation results of the absorbent composition (9).
  • Table 3 shows the results of measuring the specific surface area of the absorbent composition (10) and calculating the rate of increase of the specific surface area with respect to the surface-crosslinked type water-absorbent resin (A2).
  • Table 4 shows the performance evaluation results of the absorbent composition (10).
  • Example 9 except that the addition amount of the dispersion liquid (B21) was changed to 2.5 g and 25 g, respectively, a dried product having a particle size of 20 to 100 mesh and 10 Og obtained in the same manner as in Example 9, The surface was crosslinked in the same manner as in Example 10 to obtain an absorbent composition (1.1) and an absorbent composition (12). 33
  • Table 3 shows the results of measuring the specific surface areas of the absorbent compositions (11) and (12) and calculating the rate of increase of the specific surface area with respect to the surface-crosslinkable water-absorbent resin (A2).
  • Table 4 shows the performance evaluation results of the absorbent compositions (11) and (12).
  • Example 9 the following dispersion liquid was used instead of the dispersion liquid (B21).
  • An absorbent composition (13) and an absorbent composition (14) were obtained in the same manner as in Example 9 except that the same g of (B2Z) or (B23) was used, and surface-crosslinked in the same manner as in Example 10. .
  • Dispersion (B24) A 20% aqueous dispersion of "Matsumoto Microsphere I F-20" (expansion temperature 80-85. C, maximum expansion temperature 105-115 C, expansion ratio about 43 times).
  • Table 3 shows the results of measuring the specific surface areas of the absorbent compositions (13) and (1) and calculating the rate of increase in the specific surface area with respect to the surface-crosslinkable water-absorbent resin (A2).
  • Table 4 shows the performance evaluation results of the absorbent compositions (13) and (14).
  • a 1 liter glass reaction vessel was charged with 77 g of sodium acrylate, 22.8 g of acrylic acid, 0.2 g of N, N, methylenebisacrylamide and 293 g of deionized water, stirred and mixed. While adding 2 g of "Matsumoto mylos F-30", the temperature of the contents was kept at 3 ° C.
  • the hydrogel polymer blend (AB 2G) was shredded with an internal mixer, and then dried with a ventilated pan drier at 150 ° C and a wind speed of 2.0 m / sec.
  • the obtained dried product is pulverized and adjusted to a particle size of 20 to 100 mesh.
  • Table 3 shows the results obtained by measuring the specific area of the absorbent composition (15) and calculating the rate of increase in the specific surface area with respect to the surface-absorbing water-absorbent resin (A2).
  • Table 4 shows the performance evaluation results' of the absorbent composition (15).
  • Example 9 10 g of the same dispersion coat (B21) as in Example 9 was added to the hydrogel polymer (A 3 G), and the mixture was uniformly mixed with an internal mixer. C, Drying was performed with a ventilated pan drier at a wind speed of 2.0 msec.
  • the specific surface area of the absorbent composition (16>) was measured, and the result of calculating the rate of increase of the specific surface area with respect to the surface-crosslinkable water-absorbent resin (A3) obtained in Example 8 is shown in Table 3.
  • Table 4 shows the results of evaluating the performance of the agent composition (16).
  • Example 9 100 g of a dried product having a particle size of 20 to 100 mesh obtained in the same manner as in Example 9 except that the added amount of the dispersion liquid (B21) was changed to 0.2 g or 60 respectively, Surface cross-linking was performed in the same manner as in Example 10 to obtain a comparative absorbent composition (c7) and a comparative absorbent composition (c8).
  • Table 3 shows the results of measuring the specific surface area of the comparative absorbent compositions (c7) and (c8), and calculating the rate of increase of the specific surface area with respect to the surface-crosslinked type water-absorbent resin (A2).
  • Table 4 shows the performance evaluation results of comparative absorbent compositions (c7) and (c8). 35
  • absorbent compositions (2) and (5) were obtained in the same manner as in Examples 2 and 5. Further, absorbent compositions (13) and (14) were obtained in the same manner as in Examples 13 and 14.
  • Example 18 the absorbent composition of the present invention (25) to (28) was prepared in the same manner as in Example 18 except that the following surfactant was used in the same amount instead of the polyoxyethylene-modified silicone oil. I got Table 5 shows the results of the evaluation of these properties.
  • absorbent composition (28) polyoxyethylene lauroyl ethanolamide disodium succinate ("Bulite A-5000” manufactured by Sanyo Chemical Industries; amphoteric surfactant).
  • the comparative absorbent composition (c1) obtained in Comparative Example 1 was used as a comparative absorbent composition (c9), and the results of measurement of bulk density and evaluation using sheep blood are shown in Table 6.
  • the comparative absorbent composition (c 2) obtained in Comparative Example 2 was used as a comparative absorbent composition (c 10), and the results of measurement of bulk density and evaluation using sheep blood are shown in Table 6.
  • Absorbent composition (9) obtained in Example 9 surface-crosslinked type absorbent composition (18 ') obtained in Example 18, absorbent composition (2) obtained in the same manner as in Examples 2 and 5.
  • Absorbent compositions (13), (14) obtained in the same manner as in Examples 13 and 14 are referred to as comparative absorbent compositions (cll) to (cl6), respectively. Table 6 shows the evaluation results.
  • Comparative Example 18 100 g of the comparative absorbent composition (c9) obtained in Comparative Example 9 was put in a V-type mixer (volume: 300 ml), and the same polyoxyethylene-modified silicone oil as in Example 17 was rotated while rotating. 1 g was added and mixed to obtain a comparative absorbent composition (c17). Table 6 shows the performance evaluation results of the comparative absorbent composition (c17). Comparative Example 18
  • the hydrogel polymer (AB 2 G) obtained in Example 15 was cut into a size of 3 to 7 mm with an internal mixer, and then 150. C, wind speed 2. Dried with a ventilated band dryer at Om / sec. The obtained dried product is pulverized and adjusted to a particle size of 20 to 1 Q0 mesh. The dried product having the adjusted particle size is subjected to surface crosslinking as in Example 2. 39
  • the hydrogel polymer (A1G) obtained in Example 1 was cut into pieces having a size of 3 to 7 mm using an internal mixer, and then a thermal decomposition type foaming agent “Vinihole AZ—S j ( Decomposition temperature 100 C, main component: azobisisobutyronitrile, manufactured by Eiwa Kasei Kogyo Co., Ltd.) was added at 2% to the solid content of (A 1 G), and after uniform mixing with an internal mixer, At 150 ° C and a wind speed of 2.0 m / sec with a ventilated band dryer. The dried product obtained was pulverized and adjusted to a particle size of 20 to 100 mesh to obtain a comparative absorbent composition ( Table 6 shows the evaluation results of the comparative absorbent composition (c19).
  • Comparative absorbent composition obtained in Comparative Example 9 (c 9), Comparative absorbent composition obtained in Comparative Example 11 (c 11), Comparative absorbent composition obtained in Comparative Example 15 (C15) and comparative absorbent compositions (cl7) to (cl9) obtained in Comparative Examples 17 to 19, comparative model napkins were prepared and their performance was evaluated. Table 7 shows the results.
  • the absorbent composition and the production method of the present invention have the following features and effects. (1) Since the absorption rate under normal pressure is high and the initial pressure absorption amount (absorption rate under pressure) is excellent, when used as an absorbent for sanitary goods, for example, the effect of improving the initial dry feeling and reducing the leakage is obtained. Demonstrate.
  • Ru can improve the absorption rate in a simple method of heat drying by blending fine filler to hydrogel of any stage before the polymerization of the water-absorbent resin to a dry ⁇ 6
  • surfactants treated with surfactants have a high absorption rate for blood and blood, and have excellent water retention properties.
  • the surface dryness can be improved. It has an excellent effect on the reduction of leaks. It also exhibits excellent absorption performance and absorption rate for other body coats (urine, breast milk, amniotic fluid at birth, etc.).
  • the absorbent composition of the present invention can be used for various absorbent articles, for example, disposable disposable diapers (children and adult disposable diapers), sanitary napkins, pads for incontinent persons, breast milk pads. It is particularly suitable for sanitary and medical products such as a pad, a surgical underpad, a puerperium mart, and a dressing material for wound protection. It is also suitable for use with various absorbent sheets (eg, urine absorbent sheet, freshness preserving sheet, drip absorbing sheet, paddy rice seedling seedling sheet, concrete curing sheet, water running prevention sheet for cables, etc.). be able to.
  • various absorbent sheets eg, urine absorbent sheet, freshness preserving sheet, drip absorbing sheet, paddy rice seedling seedling sheet, concrete curing sheet, water running prevention sheet for cables, etc.
  • powders of absorbent compositions for example, soil preservatives, sludge solidifying agents, solidifying agents such as waste blood and aqueous effluents, urine gelling agents, battery electrolyte gelling agents, etc.
  • powders of absorbent compositions for example, soil preservatives, sludge solidifying agents, solidifying agents such as waste blood and aqueous effluents, urine gelling agents, battery electrolyte gelling agents, etc.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Public Health (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Materials Engineering (AREA)
  • Veterinary Medicine (AREA)
  • Epidemiology (AREA)
  • Hematology (AREA)
  • Inorganic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

L'invention porte sur une composition absorbante dont la structure comporte une résine hydrophile (A) et une charge fine (B) y incluse, et caractérisée en ce que l'aire de sa surface spécifique est supérieure d'au moins 10 % à celle de la susdite résine (A) ne contenant pas de charge (B). L'invention porte également sur un procédé de production de la composition absorbante consistant à faire sécher un polymère dans un gel aqueux pour obtenir la résine (A), après incorporation d'une charge fine (B1) présentant une densité vrai de 0,1 g/cm3 ou inférieure, et dont le diamètre des particules est compris entre 1 et 200 νm.
PCT/JP1998/003231 1997-07-18 1998-07-17 Composition absorbante, son procede de production, et article absorbant WO1999003577A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU82440/98A AU739387B2 (en) 1997-07-18 1998-07-17 Absorbent composition, method for producing thereof and absorbent products
DE19882553T DE19882553T1 (de) 1997-07-18 1998-07-17 Absorbierende Zusammensetzung, Verfahren zu deren Herstellung und absorbierende Produkte
US09/484,457 US6284362B1 (en) 1997-07-18 2000-01-18 Absorbent compositions, methods for producing thereof and absorbent products

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JP20984897 1997-07-18
JP9/209848 1997-07-18
JP22742997 1997-08-07
JP9/227429 1997-08-07
JP33507497 1997-11-18
JP9/335074 1997-11-18

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002005949A1 (fr) 2000-07-18 2002-01-24 Sanyo Chemical Industries, Ltd. Absorbants et procede de production de ces derniers, produits de synthese absorbables et articles absorbables
JP2003082250A (ja) * 2001-06-27 2003-03-19 San-Dia Polymer Ltd 吸水性樹脂組成物及びその製造法
US7867623B2 (en) 2003-10-31 2011-01-11 Basf Aktiengesellschaft Polymeric particles capable of absorbing blood and/or body fluids
JP2012522880A (ja) * 2009-04-07 2012-09-27 エボニック ストックハウゼン ゲーエムベーハー 吸水性ポリマーの製造のための中空体の使用
EP1291368B1 (fr) 2001-04-16 2017-05-31 Sumitomo Seika Chemicals Co., Ltd. Resine d'absorption d'eau appropriee a l'absorption de liquide visqueux contenant un compose a poids moleculaire eleve, et absorbant et article absorbant les contenant
JP2018021090A (ja) * 2016-08-01 2018-02-08 Ｓｄｐグローバル株式会社 吸収性樹脂粒子及びその製造方法
JP2020520401A (ja) * 2017-09-05 2020-07-09 エルジー・ケム・リミテッド 高吸水性樹脂
JP2020520402A (ja) * 2017-09-05 2020-07-09 エルジー・ケム・リミテッド 高吸水性樹脂およびその製造方法
WO2020145384A1 (fr) 2019-01-11 2020-07-16 株式会社日本触媒 Agent absorbant ayant une résine absorbante pour composant principal, et procédé de fabrication de celui-ci

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SG2013095260A (en) * 2011-08-03 2014-03-28 Sumitomo Seika Chemicals Water absorbing resin particles, method for manufacturing water absorbing resin particles, absorption body, absorptive article, and water-sealing material

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JPS5689839A (en) * 1979-12-21 1981-07-21 Zuikou Tekko Kk Production of water absorbing material
JPS5710334A (en) * 1980-06-23 1982-01-19 Kao Corp Absorptive article
JPS5986657A (ja) * 1982-11-09 1984-05-18 Nippon Shokubai Kagaku Kogyo Co Ltd 高吸収性樹脂組成物
JPS63267435A (ja) * 1987-04-24 1988-11-04 Kao Corp 吸液性複合体の製造法
JPH07216706A (ja) * 1993-12-30 1995-08-15 Kimberly Clark Corp 微小繊維を含む吸収体組成物
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002005949A1 (fr) 2000-07-18 2002-01-24 Sanyo Chemical Industries, Ltd. Absorbants et procede de production de ces derniers, produits de synthese absorbables et articles absorbables
EP1291368B1 (fr) 2001-04-16 2017-05-31 Sumitomo Seika Chemicals Co., Ltd. Resine d'absorption d'eau appropriee a l'absorption de liquide visqueux contenant un compose a poids moleculaire eleve, et absorbant et article absorbant les contenant
JP2003082250A (ja) * 2001-06-27 2003-03-19 San-Dia Polymer Ltd 吸水性樹脂組成物及びその製造法
US7867623B2 (en) 2003-10-31 2011-01-11 Basf Aktiengesellschaft Polymeric particles capable of absorbing blood and/or body fluids
US8071222B2 (en) 2003-10-31 2011-12-06 Basf Se Polymeric particles capable of absorbing blood and/or body fluids
JP2012522880A (ja) * 2009-04-07 2012-09-27 エボニック ストックハウゼン ゲーエムベーハー 吸水性ポリマーの製造のための中空体の使用
JP2018021090A (ja) * 2016-08-01 2018-02-08 Ｓｄｐグローバル株式会社 吸収性樹脂粒子及びその製造方法
JP2020520401A (ja) * 2017-09-05 2020-07-09 エルジー・ケム・リミテッド 高吸水性樹脂
JP2020520402A (ja) * 2017-09-05 2020-07-09 エルジー・ケム・リミテッド 高吸水性樹脂およびその製造方法
US11504696B2 (en) 2017-09-05 2022-11-22 Lg Chem, Ltd. Super absorbent polymer
WO2020145384A1 (fr) 2019-01-11 2020-07-16 株式会社日本触媒 Agent absorbant ayant une résine absorbante pour composant principal, et procédé de fabrication de celui-ci
KR20210110350A (ko) 2019-01-11 2021-09-07 가부시키가이샤 닛폰 쇼쿠바이 흡수성 수지를 주성분으로 하는 흡수제 및 그의 제조 방법

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