WO2021054718A1 - 고흡수성 수지 및 이의 제조 방법 - Google Patents
고흡수성 수지 및 이의 제조 방법 Download PDFInfo
- Publication number
- WO2021054718A1 WO2021054718A1 PCT/KR2020/012493 KR2020012493W WO2021054718A1 WO 2021054718 A1 WO2021054718 A1 WO 2021054718A1 KR 2020012493 W KR2020012493 W KR 2020012493W WO 2021054718 A1 WO2021054718 A1 WO 2021054718A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- crosslinking agent
- super absorbent
- polymer
- epoxy
- absorbent polymer
- Prior art date
Links
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 119
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- 229920005989 resin Polymers 0.000 claims abstract description 55
- 239000000178 monomer Substances 0.000 claims abstract description 47
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 38
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 38
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- 239000000203 mixture Substances 0.000 claims description 17
- UWFRVQVNYNPBEF-UHFFFAOYSA-N 1-(2,4-dimethylphenyl)propan-1-one Chemical group CCC(=O)C1=CC=C(C)C=C1C UWFRVQVNYNPBEF-UHFFFAOYSA-N 0.000 claims description 14
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- 150000005846 sugar alcohols Polymers 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002982 water resistant material Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/06—Ethers; Acetals; Ketals; Ortho-esters
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
- C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
- C08K5/1515—Three-membered rings
Definitions
- the present invention relates to a super absorbent polymer and a method for producing the same. More specifically, the present invention relates to a super absorbent polymer having excellent basic water absorption capacity such as water holding capacity and improved rewet characteristics and liquid permeability, and a method of manufacturing the same.
- Super Absorbent Polymer is a synthetic polymer material that has the ability to absorb moisture of 500 to 1,000 times its own weight, and each developer has a SAM (Super Absorbency Material), AGM (Absorbent Gel). Material) and so on. Since the above superabsorbent resin has begun to be put into practical use as a sanitary tool, nowadays, in addition to hygiene products such as paper diapers and sanitary napkins for children, soil repair agents for horticulture, civil engineering, water resistant materials for construction, nursery sheets, freshness maintenance agents in the food distribution field. It is widely used as a material such as, and for poultice.
- pressure may be applied to sanitary materials such as diapers and sanitary napkins by the weight of the user.
- sanitary materials such as diapers and sanitary napkins absorbs liquid
- pressure by the user's weight is applied thereto, some liquid absorbed by the super absorbent polymer oozes out again. And, leakage of urine can occur.
- an object of the present invention is to provide a super absorbent polymer and a method of manufacturing the same, in which rewetting and urine leakage are suppressed.
- the internal crosslinking agent includes a first epoxy crosslinking agent having an epoxy equivalent of 100 g / eq or more and less than 130 g / eq and a second epoxy crosslinking agent having an epoxy equivalent of 130 g / eq or more is provided.
- an internal crosslinking agent including a first epoxy crosslinking agent having an epoxy equivalent of 100 g/eq to less than 130 g/eq and a second epoxy crosslinking agent having an epoxy equivalent of 130 g/eq or more
- at least a part of the acidic group is neutralized acrylic acid-based
- a base resin comprising a crosslinked polymer in which a monomer is crosslinked polymerized
- a super absorbent polymer comprising a surface crosslinked layer formed on the surface of the particles of the base resin, wherein the crosslinked polymer is further crosslinked through a surface crosslinking agent.
- the super absorbent polymer of the present invention and a method of manufacturing the same, it is possible to provide a super absorbent polymer having excellent basic absorption properties and suppressing rewetting and urine leakage.
- the internal crosslinking agent includes a first epoxy crosslinking agent having an epoxy equivalent of 100 g/eq or more and less than 130 g/eq and a second epoxy crosslinking agent having an epoxy equivalent of 130 g/eq or more.
- base resin or “base resin powder” is made into a particle or powder form by drying and pulverizing a polymer in which a water-soluble ethylenically unsaturated monomer is polymerized, and surface modification or It means a polymer in a state in which the surface crosslinking step has not been performed.
- the hydrogel polymer obtained by the polymerization reaction of the acrylic acid-based monomer is commercially available as a powdery product, such as a super absorbent polymer, through processes such as drying, pulverization, classification, and surface crosslinking.
- the super absorbent polymer obtained by the manufacturing method according to an embodiment of the present invention has excellent overall absorption performance such as water holding capacity, pressure absorption capacity, and liquid permeability, and maintains a dry state even after swelling by water and is absorbed by the super absorbent polymer.
- the present invention has been reached by confirming that it is possible to effectively prevent rewet and urine leakage phenomena in which the collected urine is oozing again.
- a monomer composition including an acrylic acid-based monomer having an acidic group and at least partially neutralized with an acidic group, an internal crosslinking agent, and a polymerization initiator is prepared as a raw material of the superabsorbent polymer, This is polymerized to obtain a hydrogel polymer, and then dried, pulverized, and classified to prepare a base resin.
- the monomer composition which is a raw material of the super absorbent polymer, has an acidic group and includes an acrylic acid-based monomer and a polymerization initiator in which at least a part of the acidic group is neutralized.
- the acrylic acid-based monomer is a compound represented by the following formula (1):
- R 1 is an alkyl group having 2 to 5 carbon atoms containing 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 part of the acidic group is neutralized.
- the monomer partially neutralized with an alkyl substance such as sodium hydroxide, potassium hydroxide, ammonium hydroxide, or the like may be used.
- the degree of neutralization of the acrylic acid-based 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 be adjusted according to the final physical properties. However, if the degree of neutralization is too high, neutralized monomers may be precipitated and polymerization may be difficult to proceed smoothly. If the degree of neutralization is too low, the absorbency of the polymer is greatly reduced, and it may exhibit properties such as elastic rubber that are difficult to handle. have.
- the concentration of the acrylic acid-based monomer may be about 20 to about 60% by weight, preferably about 40 to about 50% by weight, based on the monomer composition including the raw material and the solvent of the super absorbent polymer, and the polymerization time and It can be made into an appropriate concentration in consideration of reaction conditions and the like. However, if the concentration of the monomer is too low, the yield of the superabsorbent polymer may be low and economic problems may occur, and if the concentration is too high, a part of the monomer is precipitated or the pulverization efficiency is low when the polymerized hydrogel polymer is pulverized. In such process, problems may occur, and the physical properties of the super absorbent polymer may be deteriorated.
- the polymerization initiator used in the polymerization in the method for producing a super absorbent polymer of the present invention is not particularly limited as long as it is generally used for preparing a super absorbent polymer.
- the polymerization initiator may be a thermal polymerization initiator or a photopolymerization initiator according to UV irradiation depending on the polymerization method.
- a certain amount of heat is generated by irradiation such as UV irradiation, and a certain amount of heat is generated according to the progress of the polymerization reaction, which is an exothermic reaction, and thus a thermal polymerization initiator may be additionally included.
- the photopolymerization initiator may be used without limitation of its configuration as long as it is a compound capable of forming radicals by light such as ultraviolet rays.
- photopolymerization initiator examples include benzoin ether, dialkyl acetophenone, hydroxyl alkylketone, phenyl glyoxylate, and benzyl dimethyl ketone.
- Ketal acyl phosphine
- alpha-aminoketone ⁇ -aminoketone
- acylphosphine a commercially available lucirin TPO, that is, 2,4,6-trimethyl-benzoyl-trimethyl phosphine oxide (2,4,6-trimethyl-benzoyl-trimethyl phosphine oxide) may be used.
- More various photoinitiators are well specified in p115 of Reinhold Schwalm's book'UV Coatings: Basics, Recent Developments and New Application (Elsevier 2007)', and are not limited to the above examples.
- the photopolymerization initiator may be included in a concentration of about 0.01 to about 1.0% by weight based on the monomer composition. If the concentration of the photopolymerization initiator is too low, the polymerization rate may be slow, and if the concentration of the photopolymerization initiator is too high, the molecular weight of the superabsorbent polymer may be small and physical properties may become uneven.
- thermal polymerization initiator at least one selected from the group of initiators consisting of persulfate-based initiators, azo-based initiators, hydrogen peroxide and ascorbic acid may be used.
- the persulfate-based initiator include sodium persulfate (Na 2 S 2 O 8 ), potassium persulfate (Potassium persulfate; K 2 S 2 O 8 ), ammonium persulfate (Ammonium persulfate; (NH 4 )) 2 S 2 O 8 ), etc.
- examples of azo-based initiators include 2, 2-azobis-(2-amidinopropane) dihydrochloride (2, 2-azobis(2-amidinopropane) dihydrochloride), 2 , 2-azobis-(N, N-dimethylene) isobutyramidine dihydrochloride, 2-(carbamoyl azo) isobutyronitrile (2-(carbamoylazo)iso
- the monomer composition includes an internal crosslinking agent as a raw material for a super absorbent polymer.
- the internal crosslinking agent is for crosslinking the interior of the polymer in which the acrylic acid-based monomer is polymerized, and is distinguished from the surface crosslinking agent for crosslinking the surface of the polymer.
- an epoxy-based crosslinking agent is included as an internal crosslinking agent, and a first epoxy crosslinking agent having an epoxy equivalent of 100 g/eq or more and less than 130 g/eq and a second epoxy crosslinking agent having an epoxy equivalent of 130 g/eq or more are simultaneously used.
- the crosslinked polymer network exhibits different flexibility for each part, and the superabsorbent polymer thus produced is a gel against external pressure while absorbing water.
- the degree of contraction and water flow characteristics will be different. Due to this structure, the super absorbent polymer may exhibit improved rewetability and liquid permeability.
- first epoxy crosslinking agent and the second epoxy crosslinking agent may be used as the internal crosslinking agent, or an internal crosslinking agent commonly used in addition to the first epoxy crosslinking agent and the second epoxy crosslinking agent may be further used. I can. However, in order to secure the effect of improving the liquid permeability and rewet property of the super absorbent polymer, it may be more preferable to use only the first epoxy crosslinking agent and the second epoxy crosslinking agent.
- first and second epoxy internal crosslinking agents a crosslinking agent having two or more epoxy functional groups capable of reacting with the carboxylic acid and carboxylate of the acrylic acid-based monomer may be used.
- the first epoxy crosslinking agent is used for overall internal crosslinking of a polymer in which an acrylic acid-based monomer is polymerized, and the epoxy equivalent is 100 g/eq or more, or 110 g/eq or more, and less than 130 g/eq, or 125 g/ eq or less, and containing two or more, preferably two, epoxy functional groups in the molecule may be used. If the epoxy equivalent of the first epoxy crosslinking agent is less than 100 g/eq, there may be a problem that the flexibility of the crosslinked polymer network decreases and the absorbency of the superabsorbent polymer decreases. On the contrary, if the epoxy equivalent is higher than 130 g/eq, a uniform crosslinking structure There may be a problem that does not form.
- the first epoxy crosslinking agent may be ethylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, or a combination thereof.
- the first epoxy crosslinking agent may be ethylene glycol diglycidyl ether or diethylene glycol diglycidyl ether having an epoxy equivalent of 110 to 125 g/eq.
- the second epoxy crosslinking agent is used having a higher epoxy equivalent than the first epoxy crosslinking agent so as to obtain a double crosslinking effect, and specifically, the epoxy equivalent is 130 g/eq or more, 150 g/eq or more, or 180 g/eq or more. While, 400 g/eq or less, or 380 g/eq or less may be used. If the epoxy equivalent of the second epoxy crosslinking agent is too high, the length of the crosslinked chain may be too long to cause a problem in the gel strength, so it is preferable that the above range is satisfied.
- a bifunctional epoxy crosslinking agent may be suitably used, and specifically, a poly(ethylene glycol) diglycidyl having 3 to 15 ethylene glycol repeating units (-CH 2 CH- 2 O-) One or more of the ethers may be used.
- the second epoxy crosslinking agent may be a poly(ethylene glycol) diglycidyl ether having 4 to 13 ethylene glycol repeating units.
- the second epoxy crosslinking agent may be a poly(ethylene glycol) diglycidyl ether having an epoxy equivalent of 180 g/eq to 380 g/eq and a number of ethylene glycol repeating units of 4 to 13.
- the internal crosslinking agent is included in a concentration of 0.001 to 1.0 parts by weight based on 100 parts by weight of the acrylic acid-based monomer, so that the polymerized polymer may be crosslinked.
- the first epoxy crosslinking agent and the second epoxy crosslinking agent may be included in an amount of 0.01 to 0.5 parts by weight based on 100 parts by weight of the acrylic acid-based monomer, respectively.
- the first epoxy crosslinking agent may be included in an amount of 0.1 to 0.3 parts by weight based on 100 parts by weight of the acrylic acid-based monomer
- the second epoxy crosslinking agent may be included in an amount of 0.01 to 0.15 parts by weight based on 100 parts by weight of the acrylic acid-based monomer.
- the content ratio of the first epoxy crosslinking agent and the second epoxy crosslinking agent is not particularly limited, and may be appropriately adjusted according to the type and characteristics of the used crosslinking agent.
- the weight ratio of the first epoxy crosslinking agent: the second epoxy crosslinking agent is preferably 1:1 to 30:1, or 1.1: It may be 1 to 27:1.
- the monomer composition of the super absorbent polymer may further include additives such as a thickener, a plasticizer, a storage stabilizer, and an antioxidant, if necessary.
- Raw materials such as an acrylic acid-based monomer, a photopolymerization initiator, a thermal polymerization initiator, an internal crosslinking agent, and an additive in which at least a part of the acidic group is neutralized may be prepared in the form of a monomer composition solution dissolved in a solvent.
- the solvent that can be used at this time can be used without limitation of its composition as long as it can dissolve the above-described components.
- ethyl ether, toluene, xylene, butyrolactone, carbitol, methyl cellosolve acetate, and N,N-dimethylacetamide may be used in combination.
- the solvent may be included in the remaining amount excluding the above-described components with respect to the total content of the monomer composition.
- the polymerization method is largely divided into thermal polymerization and photopolymerization depending on the polymerization energy source, and when performing thermal polymerization, it can be performed in a reactor having a stirring axis such as a kneader, and when performing photopolymerization, it is possible to move.
- the polymerization method described above is an example, and the present invention is not limited to the polymerization method described above.
- hydrogel polymer discharged to the outlet of the reactor may be in the form of several centimeters to several millimeters.
- size of the resulting hydrogel polymer may vary depending on the concentration and injection speed of the monomer composition to be injected, and a hydrogel polymer having a weight average particle diameter of 2 to 50 mm can be obtained.
- the form of the hydrogel polymer usually obtained may be a hydrogel polymer in a sheet form having a width of the belt.
- the thickness of the polymer sheet varies depending on the concentration and injection speed of the monomer composition to be injected, but it is preferable to supply the monomer composition so that a sheet-like polymer having a thickness of about 0.5 to about 5 cm can be obtained.
- the production efficiency is not preferable, and when the thickness of the polymer on the sheet exceeds 5 cm, the polymerization reaction does not occur evenly over the entire thickness due to the excessively thick thickness. I can't.
- the water content of the hydrogel polymer obtained by the above method may have a water content of about 40 to about 80% by weight.
- the "water content” refers to a value obtained by subtracting the weight of the dried polymer from the weight of the hydrogel polymer as the content of moisture occupied by the total weight of the hydrogel polymer. Specifically, it is defined as a calculated value by measuring the weight loss due to evaporation of moisture in the polymer during drying by raising the temperature of the polymer through infrared heating.
- the drying condition is a method of raising the temperature from room temperature to about 180° C. and then maintaining it at 180° C., and the total drying time is set to 20 minutes including 5 minutes of the temperature increase step, and the moisture content is measured.
- a step of coarse pulverization before drying may be further performed in order to increase the efficiency of the drying step.
- the grinder used is not limited in configuration, but specifically, a vertical pulverizer, a turbo cutter, a turbo grinder, a rotary cutter mill, and cutting Cutter mill, disc mill, shred crusher, crusher, chopper, and disc cutter. However, it is not limited to the above-described example.
- the pulverization step may be pulverized so that the particle diameter of the hydrogel polymer is about 2 to about 10 mm.
- the drying temperature in the drying step may be about 150 to about 250°C.
- the drying temperature is less than 150°C, the drying time may be too long and the physical properties of the finally formed super absorbent polymer may be deteriorated.
- the drying temperature exceeds 250°C, only the polymer surface is excessively dried, resulting in a subsequent pulverization process. Fine powder may be generated at, and there is a concern that the physical properties of the finally formed super absorbent polymer may be deteriorated. Therefore, preferably, the drying may be performed at a temperature of about 150 to about 200°C, more preferably about 160 to about 180°C.
- the process may be performed for about 20 to about 90 minutes in consideration of process efficiency, but is not limited thereto.
- the drying method in the drying step is also commonly used as a drying process of the hydrogel polymer, it may be selected and used without limitation of its configuration.
- the drying step may be performed by a method such as hot air supply, infrared irradiation, microwave irradiation, or ultraviolet irradiation.
- the moisture content of the polymer after such a drying step may be about 0.1 to about 10% by weight.
- the polymer powder obtained after the pulverization step may have a particle diameter of about 150 to about 850 ⁇ m.
- the pulverizer used to pulverize with such a particle size is specifically, a pin mill, a hammer mill, a screw mill, a roll mill, a disc mill, or a jog. Mill (jog mill) or the like may be used, but the present invention is not limited to the above-described examples.
- a separate process of classifying the polymer powder obtained after pulverization according to the particle size may be performed, and the polymer powder is subjected to a certain weight ratio according to the particle size range. It can be classified so as to be.
- a surface crosslinking agent is mixed with the dried and pulverized polymer, that is, the base resin.
- a surface crosslinking reaction is performed on the pulverized polymer by mixing a dried and pulverized polymer, that is, a surface crosslinking solution containing a surface crosslinking agent in a base resin, and then heating these mixtures to raise the temperature. Carry out.
- the surface crosslinking step is a step of forming a super absorbent polymer having improved physical properties by inducing a crosslinking reaction on the surface of the pulverized polymer in the presence of a surface crosslinking agent.
- a surface crosslinking layer (surface modification layer) is formed on the surface of the pulverized polymer particles through such surface crosslinking.
- the surface crosslinking agent is applied to the surface of the super absorbent polymer particle, the surface crosslinking reaction occurs on the surface of the superabsorbent polymer particle, which substantially does not affect the inside of the particle and improves the crosslinkability on the surface of the particle. Therefore, the surface crosslinked superabsorbent polymer particles have a higher degree of crosslinking near the surface than at the inside.
- the surface crosslinking agent a compound capable of reacting with a functional group of a polymer is used, for example a polyhydric alcohol compound, an epoxy compound, a polyamine compound, a haloepoxy compound, a condensation product of a haloepoxy compound, an oxazoline compound, a polyvalent metal salt, Alternatively, an alkylene carbonate compound or the like can be used.
- an epoxy-based surface crosslinking agent may be used so that the water absorption capacity can be further improved without deteriorating the rewetting property of the super absorbent polymer.
- epoxy-based surface crosslinking agents examples include ethylene glycol diglycidyl ether, diethyleneglycol diglycidyl ether, and triethyleneglycol diglycidyl ether. ether), tetraethyleneglycol diglycidyl ether, glycerin polyglycidyl ether, or sorbitol polyglycidyl ether.
- the amount of the epoxy-based surface crosslinking agent added is about 0.005 parts by weight or more, or about 0.01 parts by weight or more, or about 0.02 parts by weight or more, and about 0.2 parts by weight or less, or about 0.1 parts by weight, based on 100 parts by weight of the base resin. It may be used in parts by weight or less, or 0.05 parts by weight or less.
- the content of the epoxy-based surface crosslinking agent is too small, the crosslinking density of the surface crosslinking layer is too low, so that absorption properties such as water absorption under pressure and liquid permeability are lowered. If too much is used, due to the progress of excessive surface crosslinking reaction The rewetting properties may be deteriorated.
- the epoxy-based surface crosslinking agent When the epoxy-based surface crosslinking agent is added, water may be mixed together and added in the form of a surface crosslinking solution. When water is added, there is an advantage that the surface crosslinking agent can be evenly dispersed in the polymer. At this time, the amount of water added is about 1 to about 10 parts by weight of the polymer for the purpose of inducing even dispersion of the surface crosslinking agent and preventing agglomeration of the polymer powder and optimizing the surface penetration depth of the surface crosslinking agent. It is preferably added in a negative proportion.
- a polyvalent metal salt for example, an aluminum salt, more specifically, may further include at least one selected from the group consisting of a sulfate, potassium, ammonium, sodium, and hydrochloride salt of aluminum.
- the liquid permeability of the super absorbent polymer prepared by the method of one embodiment may be further improved.
- These polyvalent metal salts may be added to the surface crosslinking solution together with the surface crosslinking agent, and may be used in an amount of 0.01 to 4 parts by weight based on 100 parts by weight of the base resin.
- a hydrophobic material may be selectively mixed with the base resin before heating to perform a surface crosslinking reaction to further improve rewetting characteristics.
- the absorption rate and liquid permeability may be further improved as compared to a resin in which a hydrophobic material is not used.
- the hydrophobic material may be a material having HLB as a lower limit of 0 or more, or 1 or more, or 2 or more and satisfies an upper limit of 6 or less, or 5 or less, or 5.5 or less.
- a material having a melting point of less than or equal to the surface crosslinking reaction temperature may be used.
- Hydrophobic substances that can be used include, for example, glyceryl stearate, glycol stearate, magnesium stearate, glyceryl laurate, sorbitan stearate. stearate), sorbitan trioleate, or PEG-4 dilaurate, and the like, preferably glyceryl stearate or glyceryl laurate, The present invention is not limited thereto.
- the hydrophobic material is distributed in the surface modification layer on the surface of the base resin to prevent the swollen resin particles from being agglomerated or agglomerated with each other according to the increased pressure in the process of absorbing the liquid and swelling the superabsorbent resin, and has hydrophobicity on the surface.
- the hydrophobic material is about 0.02 parts by weight or more, or about 0.025 parts by weight or more, or about 0.05 parts by weight or more, and about 0.5 parts by weight or less, or about 0.3 parts by weight or less, or about 0.1 parts by weight based on 100 parts by weight of the base resin. It can be mixed so that it may become the following. If the content of the hydrophobic material is too small (less than 0.02 parts by weight), it may be insufficient to improve the rewetting characteristics, and if too much is included in excess of 0.5 parts by weight, the base resin and the hydrophobic material are separated from each other and there is no effect of improving rewet or impurities. Since there may be a problem acting as the weight part range may be preferable from this point of view.
- the method of mixing the hydrophobic material is not particularly limited and may be appropriately adopted as long as it is a method capable of evenly mixing with the base resin.
- the hydrophobic material is mixed by dry method before mixing the surface crosslinking solution containing the epoxy-based surface crosslinking agent in the base resin, or by dispersing it in the surface crosslinking solution together with the surface crosslinking agent and mixing it with the base resin. can do.
- the hydrophobic material may be heated to a melting point or higher and mixed in a solution state.
- a surface modification step is performed on the base resin by heating the mixture of the base resin and the epoxy-based surface crosslinking agent to increase the temperature.
- the surface modification step may be performed by heating at a temperature of about 120 to about 190°C, preferably about 130 to about 180°C for about 10 to about 90 minutes, preferably about 20 to about 70 minutes. If the crosslinking reaction temperature is less than 120°C or the reaction time is too short, the surface crosslinking reaction may not occur properly and the transmittance may be lowered, and if the reaction time exceeds 190°C or the reaction time is too long, the water holding capacity may be deteriorated.
- the means for increasing the temperature for the surface modification reaction is not particularly limited. It can be heated by supplying a heat medium or by directly supplying a heat source.
- a heated fluid such as steam, hot air, or hot oil may be used, but the present invention is not limited thereto, and the temperature of the supplied heat medium is the means of the heat medium, the rate of temperature increase, and the temperature increase. It can be appropriately selected in consideration of the target temperature.
- a heat source directly supplied heating through electricity and heating through gas may be mentioned, but the present invention is not limited to the above-described examples.
- a surface crosslinking structure formed by reacting an epoxy-based surface crosslinking agent and a functional group of the base resin is formed on the surface of the base resin, and a surface in which the aforementioned hydrophobic material is evenly distributed in the surface crosslinking structure.
- a modified layer may be formed.
- the super absorbent polymer prepared by the method of the present invention decreases physical properties such as water holding capacity and pressure absorption capacity. It can have improved rewetting properties and initial absorption rate without having to do so.
- an internal crosslinking agent including a first epoxy crosslinking agent having an epoxy equivalent of 100 g/eq or more and less than 130 g/eq and a second epoxy crosslinking agent having an epoxy equivalent of 130 g/eq or more
- a base resin comprising a crosslinked polymer obtained by crosslinking and polymerizing an acrylic acid-based monomer in which at least a part of an acidic group is neutralized; And a surface crosslinked layer formed on the surface of the particles of the base resin, wherein the crosslinked polymer is further crosslinked through a surface crosslinking agent.
- the super absorbent polymer has a water holding capacity (CRC) of about 25 g/g or more, or about 29 g/g or more, or about 30 g/g or more, and about 40 g/g or less, as measured according to the EDANA method WSP 241.3. , Or about 38 g/g or less, or about 35 g/g or less.
- CRC water holding capacity
- the super absorbent polymer may have a permeability (unit: second) measured according to Equation 1 below about 35 seconds or less, or about 30 seconds or less.
- T1 For T1, add 0.2 ⁇ 0.0005 g of a classified (300 ⁇ 600 ⁇ m) superabsorbent resin sample into the chromatography tube, add brine to make the saline volume 50 ml, and leave for 30 minutes, then the liquid level is 20 at 40 ml. It is the time it takes to decrease to ml, and B is the time it takes for the liquid level to decrease from 40 ml to 20 ml in a chromatographic tube filled with brine.
- a classified (300 ⁇ 600 ⁇ m) superabsorbent resin sample For T1, add 0.2 ⁇ 0.0005 g of a classified (300 ⁇ 600 ⁇ m) superabsorbent resin sample into the chromatography tube, add brine to make the saline volume 50 ml, and leave for 30 minutes, then the liquid level is 20 at 40 ml. It is the time it takes to decrease to ml, and B is the time it takes for the liquid level to decrease from 40 ml to 20 m
- the superabsorbent polymer may exhibit excellent water absorption characteristics, and more improved rewetting characteristics.
- the rewetting property (long-term rewetting of pressurized tap water) defined as the weight of water oozing back from the filter paper may be 1.0 g or less, or 0.9 g or less, or 0.8 g or less, or 0.76 g or less.
- the tap water used in the rewet property evaluation has an electrical conductivity of 140 to 150 ⁇ S/cm. Since the electrical conductivity of tap water greatly affects the measured properties, it is necessary to measure properties such as rewet using tap water having the same level of electrical conductivity.
- the superabsorbent polymer of the present invention has excellent absorption ability, and even when a large amount of urine is absorbed, rewetting and urine leakage can be suppressed.
- EGDGE ethylene glycol diglycidyl ether
- PEGDGE
- step (1) except that 0.23 parts by weight of ethylene glycol diglycidyl ether and 0.05 parts by weight of poly(ethylene glycol) diglycidyl ether having 4 ethylene glycol repeat units were used based on 100 parts by weight of acrylic acid. In the same manner as in Example 1 to obtain a superabsorbent polymer powder.
- step (1) except that 0.18 parts by weight of ethylene glycol diglycidyl ether and 0.10 parts by weight of poly(ethylene glycol) diglycidyl ether having 4 ethylene glycol repeat units were used based on 100 parts by weight of acrylic acid. In the same manner as in Example 1 to obtain a super absorbent polymer powder.
- step (1) except that 0.15 parts by weight of ethylene glycol diglycidyl ether and 0.13 parts by weight of poly(ethylene glycol) diglycidyl ether having 4 ethylene glycol repeat units were used based on 100 parts by weight of acrylic acid. In the same manner as in Example 1 to obtain a superabsorbent polymer powder.
- step (1) instead of poly(ethylene glycol) diglycidyl ether with 4 ethylene glycol repeat units, poly(ethylene glycol) diglycidyl ether with 9 ethylene glycol repeat units (epoxy equivalent 268 eq/g ) To obtain a super absorbent polymer powder in the same manner as in Example 2.
- step (1) instead of poly(ethylene glycol) diglycidyl ether with 4 ethylene glycol repeat units, poly(ethylene glycol) diglycidyl ether with 13 ethylene glycol repeat units (epoxy equivalent 372 eq/g) ) To obtain a super absorbent polymer powder in the same manner as in Example 2.
- step (1) a super absorbent polymer powder was prepared in the same manner as in Example 2, except that diethylene glycol diglycidyl ether (DGDGE, epoxy equivalent 122 g/eq) was used instead of ethylene glycol diglycidyl ether. Got it.
- DGDGE diethylene glycol diglycidyl ether
- step (1) a super absorbent polymer powder was prepared in the same manner as in Example 3, except that diethylene glycol diglycidyl ether (DGDGE, epoxy equivalent 122 g/eq) was used instead of ethylene glycol diglycidyl ether. Got it.
- DGDGE diethylene glycol diglycidyl ether
- step (1) instead of poly(ethylene glycol) diglycidyl ether with 4 ethylene glycol repeat units, poly(ethylene glycol) diglycidyl ether with 9 ethylene glycol repeat units (epoxy equivalent 268 eq/g ) To obtain a super absorbent polymer powder in the same manner as in Example 7.
- step (1) instead of poly(ethylene glycol) diglycidyl ether with 4 ethylene glycol repeat units, poly(ethylene glycol) diglycidyl ether with 13 ethylene glycol repeat units (epoxy equivalent 372 eq/g) ) To obtain a super absorbent polymer powder in the same manner as in Example 7.
- step (1) poly(ethylene glycol) diglycidyl ether having 4 ethylene glycol repeat units was not included as an internal crosslinking agent, and only ethylene glycol diglycidyl ether was used in 0.28 parts by weight based on 100 parts by weight of acrylic acid. Except that, a super absorbent polymer powder was obtained in the same manner as in Example 1.
- step (1) poly(ethylene glycol) diglycidyl ether having 4 ethylene glycol repeat units was not included as an internal crosslinking agent, and only ethylene glycol diglycidyl ether was used in an amount of 0.32 parts by weight based on 100 parts by weight of acrylic acid. Except that, a super absorbent polymer powder was obtained in the same manner as in Example 1.
- the internal crosslinking agent does not contain poly(ethylene glycol) diglycidyl ether having 4 ethylene glycol repeat units, and diethylene glycol diglycidyl ether (DGDGE, epoxy equivalent 122 g/eq)
- DGDGE diethylene glycol diglycidyl ether
- a super absorbent polymer powder was obtained in the same manner as in Example 1, except that only 0.28 parts by weight was used based on 100 parts by weight of acrylic acid.
- step (1) only poly(ethylene glycol) diglycidyl ether having 4 ethylene glycol repeat units without ethylene glycol diglycidyl ether as an internal crosslinking agent was used in 0.28 parts by weight based on 100 parts by weight of acrylic acid. Except that, a super absorbent polymer powder was obtained in the same manner as in Example 1.
- physiological saline or saline means 0.9 wt% sodium chloride (NaCl) aqueous solution.
- tap water used in the following rewet physical property evaluation was measured using Orion Star A222 (Thermo Scientific), which had an electrical conductivity of 140 to 150 ⁇ S/cm.
- super absorbent polymer W 0 (g) (about 0.2 g) was uniformly placed in a nonwoven bag and sealed, and then immersed in physiological saline (0.9% by weight) at room temperature. After 30 minutes elapsed, water was removed from the bag for 3 minutes under the condition of 250 G using a centrifuge, and the mass W 2 (g) of the bag was measured. Moreover, after performing the same operation without using a resin, the mass W 1 (g) at that time was measured. Using each obtained mass, CRC (g/g) was calculated according to the following equation.
- Examples 1 to 10 are excellent in water-retaining ability, but also excellent in both liquid permeability and rewetability.
- the liquid permeability and rewetability are remarkably compared to Examples 1 to 10 using the same amount of the internal crosslinking agent. fell.
- Comparative Example 2 in which one type of internal crosslinking agent was used, but the content of the crosslinking agent was increased, the liquid permeability was slightly improved, but the water holding capacity and rewetability were poor.
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Abstract
Description
내부 가교제 함량(아크릴산 100 중량부 대비 중량부) | 고흡수성 수지 | ||||
제1가교제 | 제2가교제(PEGDGE, n은 반복단위수) | CRC (g/g) | 통액성 (초) | 가압 수도수 장기 재습윤 (g) | |
실시예 1 | 0.27(EGDGE) | 0.01 (n=4) | 30.1 | 29 | 0.75 |
실시예 2 | 0.23(EGDGE) | 0.05 (n=4) | 30.3 | 25 | 0.51 |
실시예 3 | 0.18(EGDGE) | 0.10 (n=4) | 30.9 | 28 | 0.65 |
실시예 4 | 0.15(EGDGE) | 0.13 (n=4) | 31.1 | 29 | 0.76 |
실시예 5 | 0.23(EGDGE) | 0.05 (n=9) | 30.4 | 28 | 0.62 |
실시예 6 | 0.23(EGDGE) | 0.05 (n=13) | 30.4 | 29 | 0.65 |
실시예 7 | 0.23(DGDGE) | 0.05 (n=4) | 30.4 | 26 | 0.55 |
실시예 8 | 0.18(DGDGE) | 0.10 (n=4) | 30.9 | 29 | 0.65 |
실시예 9 | 0.23(DGDGE) | 0.05 (n=9) | 30.6 | 28 | 0.62 |
실시예10 | 0.23(DGDGE) | 0.05 (n=13) | 30.8 | 29 | 0.66 |
비교예 1 | 0.28(EGDGE) | - | 30.1 | 37 | 0.84 |
비교예 2 | 0.32(EGDGE) | - | 28.5 | 28 | 1.21 |
비교예 3 | 0.28(DGDGE) | - | 30.3 | 37 | 0.83 |
비교예 4 | - | 0.28 (n=4) | 31.5 | 36 | 0.80 |
Claims (12)
- 산성기를 가지며 상기 산성기의 적어도 일부가 중화된 아크릴산계 단량체 및 내부 가교제가 가교 중합된 베이스 수지(base resin)를 준비하는 단계; 및표면 가교제의 존재 하에, 상기 베이스 수지를 승온하여 상기 베이스 수지에 대한 표면 개질을 수행하는 단계를 포함하고,상기 내부 가교제는 에폭시 당량이 100 g/eq 이상 내지 130 g/eq 미만인 제1에폭시 가교제 및 에폭시 당량이 130 g/eq 이상인 제2에폭시 가교제를 포함하는, 고흡수성 수지의 제조방법.
- 제1항에 있어서,상기 제2에폭시 가교제는 에폭시 당량이 150 g/eq 내지 400 g/eq인, 고흡수성 수지의 제조방법.
- 제1항에 있어서,상기 제1에폭시 가교제 및 제2에폭시 가교제는 각각 아크릴산계 단량체 100 중량부에 대하여 0.01 중량부 내지 0.5 중량부로 포함되는, 고흡수성 수지의 제조방법.
- 제1항에 있어서,상기 제1에폭시 가교제 : 제2에폭시 가교제의 중량비는 1:1 내지 30:1인, 고흡수성 수지의 제조방법.
- 제1항에 있어서,제1에폭시 가교제는 에틸렌글리콜 디글리시딜에테르, 디에틸렌글리콜 디글리시딜에테르, 또는 이들의 조합인, 고흡수성 수지의 제조방법.
- 제1항에 있어서,제2에폭시 가교제는 에틸렌글리콜 반복단위 개수가 3 내지 15인 폴리(에틸렌글리콜) 디글리시딜에테르 중 1종 이상인, 고흡수성 수지의 제조방법.
- 제1항에 있어서,상기 베이스 수지의 표면 개질 단계는, HLB가 0 이상 6 이하인 소수성 물질 존재 하에 수행되는, 고흡수성 수지의 제조방법.
- 제1항에 있어서,상기 베이스 수지를 준비하는 단계는,산성기를 가지며 상기 산성기의 적어도 일부가 중화된 아크릴산계 단량체, 제1에폭시 가교제 및 제2에폭시 가교제를 포함하는 내부 가교제, 및 중합 개시제를 포함하는 모노머 조성물을 중합하여 함수겔상 중합체를 형성하는 단계;상기 함수겔상 중합체를 건조하는 단계;상기 건조된 중합체를 분쇄하는 단계; 및상기 분쇄된 중합체를 분급하는 단계를 포함하는, 고흡수성 수지의 제조 방법.
- 에폭시 당량이 100 g/eq 이상 내지 130 g/eq 미만인 제1에폭시 가교제 및 에폭시 당량이 130 g/eq 이상인 제2에폭시 가교제를 포함하는 내부 가교제의 존재 하에, 산성기의 적어도 일부가 중화된 아크릴산계 단량체가 가교 중합된 가교 중합체를 포함하는 베이스 수지; 및상기 베이스 수지의 입자 표면에 형성되어 있고, 상기 가교 중합체가 표면 가교제를 매개로 추가 가교된 표면 가교층을 포함하는 고흡수성 수지.
- 제9항에 있어서,상기 고흡수성 수지는 원심분리 보수능(CRC)이 25 g/g 이상인, 고흡수성 수지.
- 제9항에 있어서,상기 고흡수성 수지는 하기 식 1에 따라 측정되는 통액성이 30초 이하인, 고흡수성 수지:[식 1]통액성(sec) = T1 - B상기 식 1에서,T1은 크로마토그래피 관 내에 분급(300 ~ 600 ㎛)된 고흡수성 수지 시료 0.2 ± 0.0005 g을 넣고 염수를 가하여 염수 부피가 50 ml가 되게 한 후, 30분 간 방치 후, 액면높이가 40 ml에서 20 ml까지 줄어드는 데에 걸리는 시간이고, B는 염수가 채워진 크로마토그래피 관에서 액면높이가 40 ml에서 20 ml까지 줄어드는 데에 걸리는 시간이다.
- 제9항에 있어서,상기 고흡수성 수지는, 상기 고흡수성 수지 4 g을 수도수 200 g에 침지시켜 2시간 동안 팽윤시킨 후, 팽윤된 상기 고흡수성 수지를 0.75 psi의 압력 하에 1분 동안 여과지 상에서 방치하고 나서, 상기 고흡수성 수지로부터 상기 여과지로 다시 배어나온 물의 중량으로 정의되는 가압 수도수 장기 재습윤이 1.0 g 이하인, 고흡수성 수지.
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BR112021014295A BR112021014295A2 (pt) | 2019-09-18 | 2020-09-16 | Polímero superabsorvente e método de preparação para o mesmo |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100492917B1 (ko) * | 2003-08-30 | 2005-06-01 | 애경정밀화학 주식회사 | 비드상 고흡수성 수지의 제조방법 |
JP2011080069A (ja) * | 2010-11-04 | 2011-04-21 | Sumitomo Seika Chem Co Ltd | 吸水性樹脂 |
KR101812895B1 (ko) * | 2016-09-20 | 2017-12-28 | 롯데케미칼 주식회사 | 고흡수성 수지 제조방법 |
KR20190068408A (ko) * | 2017-12-08 | 2019-06-18 | 주식회사 엘지화학 | 고흡수성 수지 및 이의 제조 방법 |
KR20190072406A (ko) * | 2017-12-15 | 2019-06-25 | 주식회사 엘지화학 | 고흡수성 수지 및 이의 제조 방법 |
-
2020
- 2020-09-16 WO PCT/KR2020/012493 patent/WO2021054718A1/ko unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100492917B1 (ko) * | 2003-08-30 | 2005-06-01 | 애경정밀화학 주식회사 | 비드상 고흡수성 수지의 제조방법 |
JP2011080069A (ja) * | 2010-11-04 | 2011-04-21 | Sumitomo Seika Chem Co Ltd | 吸水性樹脂 |
KR101812895B1 (ko) * | 2016-09-20 | 2017-12-28 | 롯데케미칼 주식회사 | 고흡수성 수지 제조방법 |
KR20190068408A (ko) * | 2017-12-08 | 2019-06-18 | 주식회사 엘지화학 | 고흡수성 수지 및 이의 제조 방법 |
KR20190072406A (ko) * | 2017-12-15 | 2019-06-25 | 주식회사 엘지화학 | 고흡수성 수지 및 이의 제조 방법 |
Non-Patent Citations (3)
Title |
---|
ODIAN: "Principle of Polymerization", 1981, WILEY, pages: 203 |
REINHOLD SCHWALM: "UV Coatings: Basics, Recent Developments and New Application", 2007, ELSEVIER, pages: 115 |
See also references of EP3885397A4 |
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