WO2023121125A1 - 고흡수성 수지 조성물 및 이의 제조 방법 - Google Patents
고흡수성 수지 조성물 및 이의 제조 방법 Download PDFInfo
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- WO2023121125A1 WO2023121125A1 PCT/KR2022/020322 KR2022020322W WO2023121125A1 WO 2023121125 A1 WO2023121125 A1 WO 2023121125A1 KR 2022020322 W KR2022020322 W KR 2022020322W WO 2023121125 A1 WO2023121125 A1 WO 2023121125A1
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- base resin
- superabsorbent polymer
- polymer
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- 239000004604 Blowing Agent Substances 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
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- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical group [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
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- LXEKPEMOWBOYRF-UHFFFAOYSA-N [2-[(1-azaniumyl-1-imino-2-methylpropan-2-yl)diazenyl]-2-methylpropanimidoyl]azanium;dichloride Chemical compound Cl.Cl.NC(=N)C(C)(C)N=NC(C)(C)C(N)=N LXEKPEMOWBOYRF-UHFFFAOYSA-N 0.000 description 1
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- PODOEQVNFJSWIK-UHFFFAOYSA-N diphenylphosphoryl-(2,4,6-trimethoxyphenyl)methanone Chemical compound COC1=CC(OC)=CC(OC)=C1C(=O)P(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 PODOEQVNFJSWIK-UHFFFAOYSA-N 0.000 description 1
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- VUFOSBDICLTFMS-UHFFFAOYSA-M ethyl-hexadecyl-dimethylazanium;bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)CC VUFOSBDICLTFMS-UHFFFAOYSA-M 0.000 description 1
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- TYQCGQRIZGCHNB-JLAZNSOCSA-N l-ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(O)=C(O)C1=O TYQCGQRIZGCHNB-JLAZNSOCSA-N 0.000 description 1
- QWDJLDTYWNBUKE-UHFFFAOYSA-L magnesium bicarbonate Chemical compound [Mg+2].OC([O-])=O.OC([O-])=O QWDJLDTYWNBUKE-UHFFFAOYSA-L 0.000 description 1
- 239000002370 magnesium bicarbonate Substances 0.000 description 1
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- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
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- FAQJJMHZNSSFSM-UHFFFAOYSA-N phenylglyoxylic acid Chemical compound OC(=O)C(=O)C1=CC=CC=C1 FAQJJMHZNSSFSM-UHFFFAOYSA-N 0.000 description 1
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- 239000011736 potassium bicarbonate Substances 0.000 description 1
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- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
- C08J3/075—Macromolecular gels
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
- C08J3/245—Differential crosslinking of one polymer with one crosslinking type, e.g. surface crosslinking
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
-
- 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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/328—Phosphates of heavy metals
Definitions
- the present invention is to provide a superabsorbent polymer composition having deodorizing or deodorizing power and a method for preparing the same.
- the present invention provides the following superabsorbent polymer composition:
- An acrylic acid-based monomer having an acidic group at least partially neutralized is formed on a base resin including a crosslinked polymer crosslinked with an internal crosslinking agent and a surface of the base resin, and the crosslinked polymer is additionally crosslinked through a surface crosslinking agent.
- step 1 forming a water-containing gel polymer by cross-linking polymerization of acrylic acid-based monomers having at least partially neutralized acidic groups in the presence of an internal cross-linking agent and a polymerization initiator (step 1);
- step 2 preparing a base resin containing a crosslinked polymer obtained by drying and pulverizing the water-containing gel polymer (step 2);
- step 3 preparing a mixture by mixing the surface crosslinking liquid with the base resin (step 3);
- step 5 mixing an aqueous solution containing a sulfur-containing amino acid and a metal iodide salt with the superabsorbent polymer (step 5);
- super absorbent polymer means the super absorbent polymer itself, depending on the context, or commercialized polymers through additional processes, such as surface crosslinking, fine powder reassembly, drying, grinding, classification, etc. It can be used to cover everything that has been put into a state suitable for.
- a superabsorbent polymer composition is provided.
- an acrylic acid-based monomer having an acidic group at least partially neutralized is formed on a base resin including a crosslinked polymer obtained by crosslinking polymerization with an internal crosslinking agent, and formed on the surface of the base resin, and the crosslinked polymer is a surface crosslinking agent.
- the acrylic acid-based monomer may be any monomer commonly used in the preparation of super absorbent polymers. Specifically, the acrylic acid-based monomer may be a compound represented by Formula 1 below:
- R 1 is an alkyl group having 2 to 5 carbon atoms including an unsaturated bond
- M 1 is a hydrogen atom, a monovalent or divalent metal, an ammonium group, or an organic amine salt.
- the acrylic acid-based monomer includes at least one selected from the group consisting of acrylic acid, methacrylic acid, and monovalent metal salts, divalent metal salts, ammonium salts, and organic amine salts thereof.
- the acrylic acid-based monomer may have an acidic group, and at least a portion of the acidic group may be neutralized.
- those obtained by partially neutralizing the monomers with alkali substances such as sodium hydroxide, potassium hydroxide, and ammonium hydroxide may be used.
- the degree of neutralization of the monomer may be 40 to 95 mol%, or 40 to 80 mol%, or 45 to 75 mol%.
- the range of the degree of neutralization may vary depending on the final physical properties, but if the degree of neutralization is too high, neutralized monomers may be precipitated, making it difficult for the polymerization to proceed smoothly. It can exhibit properties like elastic rubber that are difficult to handle.
- crosslinking agent is for internal crosslinking of the water-containing gel polymer, and may be used separately from a “surface crosslinking agent” to be described later.
- the internal cross-linking agent any compound may be used as long as it enables introduction of cross-linking during polymerization of the acrylic acid-based monomer.
- the internal crosslinking agent is N,N'-methylenebisacrylamide, trimethylolpropane tri(meth)acrylate, ethylene glycol di(meth)acrylate, polyethylene glycol di(meth)acrylate, propylene glycol di(meth)acrylate, (meth)acrylate, polypropylene glycol di(meth)acrylate, butanedioldi(meth)acrylate, butylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, hexanedioldi (meth)acrylate, triethylene glycol di(meth)acrylate, tripropylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, dipentaerythritol pentaacrylate, glycerin tri
- the internal crosslinking agent may be added at a concentration of 0.001 to 1% by weight, or 0.01 to 0.8% by weight, or 0.1 to 0.7% by weight based on the monomer composition. That is, if the concentration of the internal crosslinking agent is too low, the absorption rate of the resin may be lowered and the gel strength may be weakened, which is not preferable. Conversely, when the concentration of the internal crosslinking agent is too high, the absorbency of the resin is lowered, which may be undesirable as an absorbent.
- additives such as a thickener, a plasticizer, a storage stabilizer, and an antioxidant may be further included in the base resin, if necessary.
- a polyhydric alcohol compound as the surface cross-linking agent in order to improve the properties of the resulting superabsorbent polymer; epoxy compounds; polyamine compounds; haloepoxy compounds; condensation products of haloepoxy compounds; oxazoline compounds; mono-, di- or polyoxazolidinone compounds; cyclic urea compounds; polyvalent metal salts; And at least one selected from the group consisting of alkylene carbonate compounds may be used.
- the amount of the surface crosslinking agent added may be appropriately selected depending on the type of the surface crosslinking agent added or reaction conditions, but is usually about 0.001 to about 5 parts by weight, preferably about 0.01 to about 5 parts by weight, based on 100 parts by weight of the polymer. 3 parts by weight, more preferably from about 0.05 to about 2 parts by weight may be used.
- the surface crosslinking agent may further include a thickening agent.
- a thickening agent By additionally crosslinking the surface of the base resin powder in the presence of a thickener, deterioration in physical properties can be minimized even after pulverization.
- at least one selected from polysaccharides and hydroxy-containing polymers may be used as the thickener.
- a gum-based thickener and a cellulose-based thickener may be used as the polysaccharide.
- Specific examples of the gum-based thickener include xanthan gum, arabic gum, karaya gum, tragacanth gum, ghatti gum, and guar gum.
- the metal iodide salt is a form in which at least one selected from the group consisting of CuI, NaI and KI and I 2 are dissolved in water.
- Metal iodide salts like sulfur-containing amino acids, can also be added to superabsorbent polymers to impart deodorizing properties.
- R 2 to R 5 are substituted or unsubstituted C 1-30 alkyl, C 1-30 alkoxy group, C 6-30 aryl, or at least one selected from the group consisting of N, O and S It may be a C 5-30 heteroaryl containing.
- a water-containing gel polymer by cross-linking and polymerizing acrylic acid-based monomers having at least partially neutralized acidic groups in the presence of an internal cross-linking agent and a polymerization initiator; Preparing a base resin including a crosslinked polymer by grinding and drying the water-containing gel polymer; preparing a mixture by mixing a surface crosslinking liquid with the base resin; heat-treating the mixture to prepare a superabsorbent polymer having a surface crosslinking layer formed on the surface of the base resin; and mixing an aqueous solution containing a sulfur-containing amino acid and a metal iodide salt with the superabsorbent polymer.
- the manufacturing method of the superabsorbent polymer largely includes preparing a water-containing gel polymer by polymerizing an acrylic acid-based monomer, and pulverizing the polymer.
- a method of crosslinking the surface of the prepared super absorbent polymer has been used.
- Step 1 is a step of preparing a water-containing gel polymer, and specifically, is a step of forming a water-containing gel polymer by crosslinking polymerization of a monomer composition containing an acrylic acid-based monomer having at least a partially neutralized acidic group.
- M 1 is a hydrogen atom, a monovalent or divalent metal, an ammonium group, or an organic amine salt.
- the acrylic acid-based monomer includes at least one selected from the group consisting of acrylic acid, methacrylic acid, and monovalent metal salts, divalent metal salts, ammonium salts, and organic amine salts thereof.
- the degree of neutralization of the monomer may be 40 to 95 mol%, or 40 to 80 mol%, or 45 to 75 mol%.
- the range of the degree of neutralization may vary depending on the final physical properties, but if the degree of neutralization is too high, neutralized monomers may be precipitated, making it difficult for the polymerization to proceed smoothly. It can exhibit properties like elastic rubber that are difficult to handle.
- the polymerizable quaternary ammonium salt may be setethyldimonium bromide, myristyl betaine, and octenidine hydrochloride (octenidine HCl).
- the polymerizable antibacterial monomer is 0.5 parts by weight or more, 1 part by weight or more, 1.5 parts by weight or more, or 1.8 parts by weight or more and 5 parts by weight or less, 4 parts by weight or less, 3 parts by weight or less, based on 100 parts by weight of the acrylic acid monomer. or 2 parts by weight or less.
- the polymerizable antibacterial monomer may not be included, but in order to obtain the antibacterial effect, the effect cannot be obtained by mixing too little of the polymerizable antibacterial monomer.
- too much polymerizable antibacterial monomer is included, there may be a problem in that water retention and absorption capacity required as a superabsorbent polymer are lowered.
- the monomer composition may include a polymerization initiator generally used in the preparation of super absorbent polymers.
- photopolymerization initiator examples include, for example, benzoin ether, dialkyl acetophenone, hydroxyl alkylketone, phenyl glyoxylate, benzyldimethyl ketal ( At least one compound selected from the group consisting of benzyl dimethyl ketal), acyl phosphine and alpha-aminoketone may be used.
- acylphosphine commercially available lucirin TPO, that is, 2,4,6-trimethyl-benzoyl-trimethyl phosphine oxide (2,4,6-trimethyl-benzoyl-trimethyl phosphine oxide) can be used.
- More various photopolymerization initiators are disclosed on page 115 of "UV Coatings: Basics, Recent Developments and New Applications (Elsevier, 2007)", a book by Reinhold Schwalm, and may be referred to.
- thermal polymerization initiator at least one compound selected from the group consisting of a persulfate-based initiator, an azo-based initiator, hydrogen peroxide, and ascorbic acid may be used.
- persulfate-based initiators include sodium persulfate (Na 2 S 2 O 8 ), potassium persulfate (K 2 S 2 O 8 ), and ammonium persulfate (NH 4 ) 2 S 2 O 8 ) and the like.
- the metal iodide salt is a form in which at least one selected from the group consisting of CuI, NaI and KI and I 2 are dissolved in water.
- Metal iodide salts like sulfur-containing amino acids, can also be added to superabsorbent polymers to impart deodorizing properties.
- the water-containing gel polymer was transferred to a meat chopper and cut into 2 mm to 10 mm. At this time, the water content of the cut hydrogel polymer was 47% by weight. Subsequently, the hydrogel polymer was dried in a hot air dryer at 170° C. for 30 minutes, and the dried hydrogel polymer was pulverized with a pin mill grinder. Subsequently, a base resin was prepared by classifying a polymer having a particle size of 150 ⁇ m to 850 ⁇ m using a sieve.
- the water-containing gel polymer was transferred to a meat chopper and cut into 2 mm to 10 mm. At this time, the water content of the cut hydrogel polymer was 47% by weight. Subsequently, the hydrogel polymer was dried in a hot air dryer at 170° C. for 30 minutes, and the dried hydrogel polymer was pulverized with a pin mill grinder. Subsequently, a base resin was prepared by classifying a polymer having a particle size of 150 ⁇ m to 850 ⁇ m using a sieve.
- a surface crosslinking solution (2.5 parts by weight of water, 0.1 part by weight of ethylene glycol diglycidyl ether (EX-810), 0.1 part by weight of aluminum sulfate 18 hydrate; Al-S ) 0.1 part by weight and 0.1 part by weight of silica (Aerosil A200) were evenly mixed, and then a surface crosslinking reaction was performed at 140° C. for 30 minutes. After the surface treatment was completed, the superabsorbent polymer having a particle diameter in the range of 150 to 850 ⁇ m was obtained by classification using a sieve.
- EX-810 ethylene glycol diglycidyl ether
- Al-S aluminum sulfate 18 hydrate
- silica silica
- a surface crosslinking solution (2.5 parts by weight of water, 0.1 part by weight of ethylene glycol diglycidyl ether (EX-810), 0.1 part by weight of aluminum sulfate 18 hydrate; Al-S ) 0.1 part by weight and 0.1 part by weight of silica (Aerosil A200) were evenly mixed, and then a surface crosslinking reaction was performed at 140° C. for 30 minutes. After the surface treatment was completed, it was classified using a sieve to obtain a superabsorbent polymer having a particle diameter in the range of 150 to 850 ⁇ m.
- the water-containing gel polymer was transferred to a meat chopper and cut into 2 mm to 10 mm. At this time, the water content of the cut hydrogel polymer was 47% by weight. Subsequently, the hydrogel polymer was dried in a hot air dryer at 170° C. for 30 minutes, and the dried hydrogel polymer was pulverized with a pin mill grinder. Subsequently, a base resin was prepared by classifying a polymer having a particle size of 150 ⁇ m to 850 ⁇ m using a sieve.
- a surface crosslinking solution (2.5 parts by weight of water, 0.1 part by weight of ethylene glycol diglycidyl ether (EX-810), 18 parts by weight of aluminum sulfate 18 hydrate; After evenly mixing 0.1 parts by weight of Al-S) and 0.1 parts by weight of silica (Aerosil A200), a surface crosslinking reaction was performed at 140° C. for 30 minutes. After the surface treatment was completed, the superabsorbent polymer having a particle diameter in the range of 150 to 850 ⁇ m was obtained by classification using a sieve.
- EX-810 ethylene glycol diglycidyl ether
- silica silica
- the water-containing gel polymer was transferred to a meat chopper and cut into 2 mm to 10 mm. At this time, the water content of the cut hydrogel polymer was 47% by weight. Subsequently, the hydrogel polymer was dried in a hot air dryer at 170° C. for 30 minutes, and the dried hydrogel polymer was pulverized with a pin mill grinder. Subsequently, a base resin was prepared by classifying a polymer having a particle size of 150 ⁇ m to 850 ⁇ m using a sieve.
- a surface crosslinking solution (2.5 parts by weight of water, 0.1 part by weight of ethylene glycol diglycidyl ether (EX-810), 0.1 part by weight of aluminum sulfate 18 hydrate; Al-S ) 0.1 parts by weight, 0.1 parts by weight of silica (Aerosil A200)) and tannin solution were evenly mixed, and a surface crosslinking reaction was performed at 140° C. for 30 minutes.
- the tannin solution was an aqueous solution and had a solid content of 5 parts by weight based on 100 parts by weight of the solution.
- the tannin solution was mixed with 0.05 parts by weight of solid content based on 100 parts by weight of the base resin.
- the water-containing gel polymer was transferred to a meat chopper and cut into 2 mm to 10 mm. At this time, the water content of the cut hydrogel polymer was 47% by weight. Subsequently, the hydrogel polymer was dried in a hot air dryer at 170° C. for 30 minutes, and the dried hydrogel polymer was pulverized with a pin mill grinder. Subsequently, a base resin was prepared by classifying a polymer having a particle size of 150 ⁇ m to 850 ⁇ m using a sieve.
- cysteine was mixed at 0.1 part by weight based on 100 parts by weight of the base resin and CuI was mixed at 0.02 part by weight based on 100 parts by weight of the base resin. Afterwards, a drying step was performed at 80° C. for 25 minutes.
- cysteine 13 wt% of cysteine
- CuI aqueous solution of CuI 1 wt% of CuI
- cysteine was mixed at 0.15 parts by weight based on 100 parts by weight of the base resin
- CuI was mixed at 0.01 part by weight based on 100 parts by weight of the base resin.
- a drying step was performed at 80° C. for 25 minutes.
- a surface crosslinking solution (2.5 parts by weight of water, 0.1 part by weight of ethylene glycol diglycidyl ether (EX-810), 0.1 part by weight of aluminum sulfate 18 hydrate; Al-S ) 0.1 part by weight and 0.1 part by weight of silica (Aerosil A200) were evenly mixed, and then a surface crosslinking reaction was performed at 140° C. for 30 minutes. After the surface treatment was completed, the superabsorbent polymer having a particle diameter in the range of 150 to 850 ⁇ m was obtained by classification using a sieve. The content of the superabsorbent polymer having an average particle size of less than 150 ⁇ m was less than 2%.
- UV irradiation device After the monomer aqueous solution composition was introduced into the supply unit of a polymerization reactor equipped with a continuously moving conveyor belt, ultraviolet rays were irradiated with a UV irradiation device while maintaining the polymerization ambient temperature at 80° C. (irradiation amount: 10 mW/cm 2 ), 2 A water-containing gel polymer was prepared by UV polymerization for 10 minutes.
- the water-containing gel polymer was transferred to a meat chopper and cut into 2 mm to 10 mm. At this time, the water content of the cut hydrogel polymer was 47% by weight. Subsequently, the hydrogel polymer was dried in a hot air dryer at 170° C. for 30 minutes, and the dried hydrogel polymer was pulverized with a pin mill grinder. Subsequently, a base resin was prepared by classifying a polymer having a particle size of 150 ⁇ m to 850 ⁇ m using a sieve.
- the water-containing gel polymer was transferred to a meat chopper and cut into 2 mm to 10 mm. At this time, the water content of the cut hydrogel polymer was 47% by weight. Subsequently, the hydrogel polymer was dried in a hot air dryer at 170° C. for 30 minutes, and the dried hydrogel polymer was pulverized with a pin mill grinder. Subsequently, a base resin was prepared by classifying a polymer having a particle size of 150 ⁇ m to 850 ⁇ m using a sieve.
- UV irradiation device After the monomer aqueous solution composition was introduced into the supply unit of a polymerization reactor equipped with a continuously moving conveyor belt, ultraviolet rays were irradiated with a UV irradiation device while maintaining the polymerization ambient temperature at 80° C. (irradiation amount: 10 mW/cm 2 ), 2 A water-containing gel polymer was prepared by UV polymerization for 10 minutes.
- the water-containing gel polymer was transferred to a meat chopper and cut into 2 mm to 10 mm. At this time, the water content of the cut hydrogel polymer was 47% by weight. Subsequently, the hydrogel polymer was dried in a hot air dryer at 170° C. for 30 minutes, and the dried hydrogel polymer was pulverized with a pin mill. Subsequently, a base resin was prepared by classifying a polymer having a particle size of 150 ⁇ m to 850 ⁇ m using a sieve.
- zirconium phosphate was mixed with the base resin powder before surface crosslinking.
- Zirconium phosphate was mixed to 2.0 parts by weight based on 100 parts by weight of the base resin powder.
- a surface crosslinking solution (2.5 parts by weight of water, 0.1 part by weight of ethylene glycol diglycidyl ether (EX-810), 0.1 part by weight of aluminum sulfate 18 hydrate; Al-S ) 0.1 parts by weight, 0.1 parts by weight of silica (Aerosil A200)) and tannin solution were evenly mixed, and a surface crosslinking reaction was performed at 140° C. for 30 minutes.
- the tannin solution was an aqueous solution and had a solid content of 5 parts by weight based on 100 parts by weight of the solution. At this time, the tannin solution was mixed with 0.05 parts by weight of solid content based on 100 parts by weight of the base resin.
- the superabsorbent polymer having a particle diameter in the range of 150 to 850 ⁇ m was obtained by classification using a sieve.
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Abstract
Description
구분 | 황 함유 아미노산 (베이스 수지 100 중량부 기준) |
요오드화 금속염 (베이스 수지 100 중량부 기준) |
항균성 중합 단량체 (아크릴산계 단량체 100 중량부 기준) |
탄닌 용액 (농도 5%) (베이스 수지 100 중량부 기준) |
지르코늄 포스페이트 (베이스 수지 100 중량부 기준) |
기타 |
실시예 1 | 0.1 | 0.02 | - | - | - | 시스테인 |
실시예 2 | 0.15 | 0.01 | - | - | - | 시스테인 |
실시예 3 | 0.3 | 0.001 | - | - | - | 시스테인 |
실시예 4 | 0.15 | 0.01 | 1.0 | 0.5 | 2.0 | 시스테인 |
실시예 5 | 0.3 | 0.001 | 0.5 | 0.5 | 2.0 | 시스테인 |
실시예 6 | 0.15 | 0.01 | - | - | - | 메티오닌 |
실시예 7 | 0.6 | 0.01 | 0.5 | 0.5 | 2.0 | 시스테인 |
비교예 1 | - | - | - | - | - | |
비교예 2 | 0.1 | - | - | - | - | 시스테인 |
비교예 3 | - | 0.02 | - | - | - | |
비교예 4 | - | - | - | - | - | Beta-cyclodextrin |
비교예 5 | - | - | - | - | 2.0 | |
비교예 6 | - | - | - | 0.5 | - |
소취력 (%) | 디아세틸 | 3-메틸부탄알 | 디메틸트리설파이드 |
실시예 1 | 13 | 27 | 35 |
실시예 2 | 58 | 58 | 82 |
실시예 3 | 77 | 77 | 99 |
실시예 4 | 66 | 60 | 82 |
실시예 5 | 80 | 78 | 97 |
실시예 6 | 60 | 53 | 85 |
실시예 7 | 85 | 82 | 98 |
비교예 1 | 0 | 0 | 0 |
비교예 2 | 13 | 27 | 28 |
비교예 3 | 0 | 3 | 40 |
비교예 4 | 0 | 0 | 30 |
비교예 5 | 20 | 0 | 22 |
비교예 6 | 11 | 49 | 51 |
CRC (g/g) |
AUP (g/g) |
|
실시예 1 | 29.5 | 21.5 |
실시예 2 | 30.1 | 21.3 |
실시예 3 | 30.2 | 21.0 |
실시예 4 | 29.4 | 20.9 |
실시예 5 | 30.0 | 21.1 |
실시예 6 | 29.5 | 20.7 |
실시예 7 | 29.9 | 21.0 |
비교예 1 | 30.8 | 21.1 |
비교예 2 | 31.0 | 20.9 |
비교예 3 | 30.0 | 21.4 |
비교예 4 | 30.3 | 20.4 |
비교예 5 | 30.2 | 20.2 |
비교예 6 | 30.4 | 21.1 |
Claims (14)
- 적어도 일부가 중화된 산성기를 가지는 아크릴산계 단량체가 내부 가교제와 가교 중합된 가교 중합체를 포함하는 베이스 수지, 및 상기 베이스 수지의 표면에 형성되어 있고, 상기 가교 중합체가 표면 가교제를 매개로 추가 가교되어 있는 표면 가교층을 포함하는 고흡수성 수지; 및황 함유 아미노산 및 요오드화 금속염을 포함하는, 고흡수성 수지 조성물.
- 제1항에 있어서,베이스 수지 100 중량부에 대하여,상기 황 함유 아미노산은 0.1 내지 1.5 중량부로,상기 요오드화 금속염은 0.001 내지 0.05 중량부로 포함되는 것인,고흡수성 수지 조성물.
- 제1항에 있어서,상기 황 함유 아미노산은 시스테인, 시스틴 및 메티오닌으로 이루어진 군 중에서 선택된 1 종 이상을 포함하는,고흡수성 수지 조성물.
- 제1항에 있어서,상기 베이스 수지는 단량체로서 중합성 항균 단량체를 더 포함하는,고흡수성 수지 조성물.
- 제1항에 있어서,지르코늄 포스페이트를 상기 베이스 수지 100 중량부에 대하여 5.0 중량부 이하로 더 포함하는,고흡수성 수지 조성물.
- 제1항에 있어서,상기 표면 가교층은 탄닌 고형분을 베이스 수지 100 중량부에 대하여 0.05 중량부 이하로 더 포함하는,고흡수성 수지 조성물.
- 내부 가교제 및 중합 개시제의 존재 하에, 적어도 일부가 중화된 산성기를 가지는 아크릴산계 단량체를 가교 중합하여 함수겔 중합체를 형성하는 단계 (단계 1);상기 함수겔 중합체를 건조 및 분쇄한 가교 중합체를 포함하는 베이스 수지를 제조하는 단계 (단계 2);상기 베이스 수지에 표면 가교액을 혼합하여 혼합물을 제조하는 단계 (단계 3);상기 혼합물을 열처리하여 상기 베이스 수지의 표면 상에 표면 가교층이 형성된 고흡수성 수지를 제조하는 단계 (단계 4); 및상기 고흡수성 수지에 황 함유 아미노산 및 요오드화 금속염을 포함하는 수용액을 혼합하는 단계 (단계 5);를 포함하는, 고흡수성 수지 조성물의 제조방법.
- 제7항에 있어서,상기 (단계 5)에서 베이스 수지 100 중량부에 대하여,상기 황 함유 아미노산은 0.1 내지 1.5 중량부로,상기 요오드화 금속염은 0.001 내지 0.05 중량부로 혼합하는,고흡수성 수지 조성물의 제조방법.
- 제7항에 있어서,상기 황 함유 아미노산은 시스테인, 시스틴 및 메티오닌으로 이루어진 군 중에서 선택된 1 종 이상을 포함하는,고흡수성 수지 조성물의 제조방법.
- 제7항에 있어서,상기 (단계 1)에서, 중합성 항균 단량체를 더 포함하는, 고흡수성 수지 조성물의 제조방법.
- 제7항에 있어서,상기 (단계 2) 이후에 지르코늄 포스페이트를 혼합하는 단계를 더 포함하는,고흡수성 수지 조성물의 제조방법.
- 제7항에 있어서,상기 (단계 3)의 표면 가교액은 탄닌 용액을 포함하는,고흡수성 수지 조성물의 제조방법.
- 제11항에 있어서,상기 지르코늄 포스페이트는 베이스 수지 100 중량부에 대하여 5.0 중량부 이하로 혼합되는,고흡수성 수지 조성물의 제조방법.
- 제12항에 있어서,상기 탄닌 용액은 베이스 수지 100 중량부에 대하여 1.0 중량부 이하로 포함되는, 고흡수성 수지 조성물의 제조방법.
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