JP2021517930A - 高吸水性樹脂の製造方法 - Google Patents
高吸水性樹脂の製造方法 Download PDFInfo
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- JP2021517930A JP2021517930A JP2020557233A JP2020557233A JP2021517930A JP 2021517930 A JP2021517930 A JP 2021517930A JP 2020557233 A JP2020557233 A JP 2020557233A JP 2020557233 A JP2020557233 A JP 2020557233A JP 2021517930 A JP2021517930 A JP 2021517930A
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- Prior art keywords
- absorbent resin
- meth
- highly water
- water
- acrylate
- Prior art date
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- 229920005989 resin Polymers 0.000 title claims abstract description 192
- 239000002250 absorbent Substances 0.000 title claims abstract description 111
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 238000004132 cross linking Methods 0.000 claims abstract description 65
- 239000000843 powder Substances 0.000 claims abstract description 62
- 229910052751 metal Inorganic materials 0.000 claims abstract description 57
- 239000002184 metal Substances 0.000 claims abstract description 57
- 238000010521 absorption reaction Methods 0.000 claims abstract description 55
- 150000001768 cations Chemical class 0.000 claims abstract description 54
- 239000000178 monomer Substances 0.000 claims abstract description 50
- 229920000642 polymer Polymers 0.000 claims abstract description 47
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 24
- 230000032683 aging Effects 0.000 claims abstract description 23
- 239000000017 hydrogel Substances 0.000 claims abstract description 23
- 238000001035 drying Methods 0.000 claims abstract description 17
- 238000010298 pulverizing process Methods 0.000 claims abstract description 14
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- 230000002378 acidificating effect Effects 0.000 claims abstract description 7
- 230000000379 polymerizing effect Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 48
- 239000002585 base Substances 0.000 claims description 43
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 34
- 239000007864 aqueous solution Substances 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- -1 2-hydroxypropyl Chemical group 0.000 claims description 24
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 24
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 22
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- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 18
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- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 16
- 150000003839 salts Chemical class 0.000 claims description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
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- 239000002202 Polyethylene glycol Substances 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 9
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- 235000011187 glycerol Nutrition 0.000 claims description 8
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- 229920001451 polypropylene glycol Polymers 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 7
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 claims description 6
- AOBIOSPNXBMOAT-UHFFFAOYSA-N 2-[2-(oxiran-2-ylmethoxy)ethoxymethyl]oxirane Chemical compound C1OC1COCCOCC1CO1 AOBIOSPNXBMOAT-UHFFFAOYSA-N 0.000 claims description 4
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 claims description 4
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 4
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- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 4
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- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims description 4
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- 239000011734 sodium Substances 0.000 claims description 3
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 claims description 2
- ZZXUZKXVROWEIF-UHFFFAOYSA-N 1,2-butylene carbonate Chemical compound CCC1COC(=O)O1 ZZXUZKXVROWEIF-UHFFFAOYSA-N 0.000 claims description 2
- UWFRVQVNYNPBEF-UHFFFAOYSA-N 1-(2,4-dimethylphenyl)propan-1-one Chemical compound CCC(=O)C1=CC=C(C)C=C1C UWFRVQVNYNPBEF-UHFFFAOYSA-N 0.000 claims description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 2
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- HDPLHDGYGLENEI-UHFFFAOYSA-N 2-[1-(oxiran-2-ylmethoxy)propan-2-yloxymethyl]oxirane Chemical compound C1OC1COC(C)COCC1CO1 HDPLHDGYGLENEI-UHFFFAOYSA-N 0.000 claims description 2
- LCZVSXRMYJUNFX-UHFFFAOYSA-N 2-[2-(2-hydroxypropoxy)propoxy]propan-1-ol Chemical compound CC(O)COC(C)COC(C)CO LCZVSXRMYJUNFX-UHFFFAOYSA-N 0.000 claims description 2
- CFYOKDXIYDYSPV-UHFFFAOYSA-N 2-ethyl-2-(hydroxymethyl)propane-1,3-diol;hexane-1,1-diol Chemical compound CCCCCC(O)O.CCC(CO)(CO)CO CFYOKDXIYDYSPV-UHFFFAOYSA-N 0.000 claims description 2
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 claims description 2
- JFMGYULNQJPJCY-UHFFFAOYSA-N 4-(hydroxymethyl)-1,3-dioxolan-2-one Chemical compound OCC1COC(=O)O1 JFMGYULNQJPJCY-UHFFFAOYSA-N 0.000 claims description 2
- SVYPQURSUBDSIQ-UHFFFAOYSA-N 4-methyl-3-oxopent-4-ene-1-sulfonic acid Chemical compound CC(=C)C(=O)CCS(O)(=O)=O SVYPQURSUBDSIQ-UHFFFAOYSA-N 0.000 claims description 2
- AEYSASDBPHWTGR-UHFFFAOYSA-N 4-oxohex-5-ene-3-sulfonic acid Chemical compound CCC(S(O)(=O)=O)C(=O)C=C AEYSASDBPHWTGR-UHFFFAOYSA-N 0.000 claims description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 2
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 2
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 2
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- 229910001628 calcium chloride Inorganic materials 0.000 claims description 2
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 claims description 2
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- 238000010537 deprotonation reaction Methods 0.000 claims description 2
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 claims description 2
- CCIVGXIOQKPBKL-UHFFFAOYSA-M ethanesulfonate Chemical compound CCS([O-])(=O)=O CCIVGXIOQKPBKL-UHFFFAOYSA-M 0.000 claims description 2
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- 125000000524 functional group Chemical group 0.000 claims description 2
- MHIBEGOZTWERHF-UHFFFAOYSA-N heptane-1,1-diol Chemical compound CCCCCCC(O)O MHIBEGOZTWERHF-UHFFFAOYSA-N 0.000 claims description 2
- ACCCMOQWYVYDOT-UHFFFAOYSA-N hexane-1,1-diol Chemical compound CCCCCC(O)O ACCCMOQWYVYDOT-UHFFFAOYSA-N 0.000 claims description 2
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- 239000011777 magnesium Substances 0.000 claims description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 2
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 2
- 239000000347 magnesium hydroxide Substances 0.000 claims description 2
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 2
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- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 2
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- FDSUVTROAWLVJA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol;prop-2-enoic acid Chemical compound OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.OCC(CO)(CO)COCC(CO)(CO)CO FDSUVTROAWLVJA-UHFFFAOYSA-N 0.000 claims 1
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- 235000010420 locust bean gum Nutrition 0.000 description 1
- 239000000711 locust bean gum Substances 0.000 description 1
- UEGPKNKPLBYCNK-UHFFFAOYSA-L magnesium acetate Chemical compound [Mg+2].CC([O-])=O.CC([O-])=O UEGPKNKPLBYCNK-UHFFFAOYSA-L 0.000 description 1
- 239000011654 magnesium acetate Substances 0.000 description 1
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- 229940069446 magnesium acetate Drugs 0.000 description 1
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- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
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- 239000004033 plastic Substances 0.000 description 1
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J20/3085—Chemical treatments not covered by groups B01J20/3007 - B01J20/3078
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
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Abstract
Description
本出願は、2018年12月12日付韓国特許出願第10−2018−0160284号に基づいた優先権の利益を主張し、当該韓国特許出願の文献に開示された全ての内容は本明細書の一部として組み含まれる。
前記含水ゲル重合体を乾燥、粉砕および分級してベース樹脂粉末を形成する段階;
表面架橋剤の存在下で前記ベース樹脂粉末の表面を追加架橋して表面架橋層を形成する段階;
25℃乃至80℃の温度下で、前記表面架橋されたベース樹脂粉末状に、1価乃至3価の金属陽イオンを添加する段階;および
前記金属陽イオンが添加された結果物を40℃乃至60℃の温度で10乃至30分間維持および熟成させる段階を含む高吸水性樹脂の製造方法を提供する。
前記含水ゲル重合体を乾燥、粉砕および分級してベース樹脂粉末を形成する段階;
表面架橋剤の存在下で前記ベース樹脂粉末の表面を追加架橋して表面架橋層を形成する段階;
25℃乃至80℃の温度下で、前記表面架橋されたベース樹脂粉末状に、1価乃至3価の金属陽イオンを添加する段階;および
前記金属陽イオンが添加された結果物を40℃乃至60℃の温度で10乃至30分間維持および熟成させる段階を含む高吸水性樹脂の製造方法が提供される。
R1−COOM1
R1は不飽和結合を含む炭素数2乃至5のアルキル基であり、
M1は水素原子、1価または2価金属、アンモニウム基または有機アミン塩である。
吸収度=CRC+AUP
CRCは、前記高吸水性樹脂の生理食塩水(0.9重量%塩化ナトリウム水溶液)に対する30分間の遠心分離保水能を示し、
AUPは、前記高吸水性樹脂の生理食塩水(0.9重量%塩化ナトリウム水溶液)に対する0.7psi下で1時間の加圧吸収能を示す。
攪拌機、窒素投入器、温度計を装着した3Lガラス容器にアクリル酸500g、ポリエチレングリコールジアクリレート(Polyethyleneglycol diacrylate)3gとジフェニル(2,4,6−トリメチルベンゾイル)−ホスフィンオキシド0.04gを添加して溶解した後、24.5重量%水酸化ナトリウム溶液896.4gを添加して窒素を連続的に投入しながら水溶性不飽和単量体水溶液を製造した。前記水溶性不飽和単量体水溶液を45℃に冷却した。この水溶液500gを横250mm、縦250mm、高さ30mmのステンレス材質の容器に加えて紫外線を照射(照射量:10mV/cm2)して60秒間UV重合を実施して含水ゲル状重合体を得た。得られた含水ゲル状重合体を2mm×2mmの大きさで粉砕した後、含水量を測定した結果、40.1%であった。
表面架橋までは実施例1と同様な方法で進行した。
表面架橋までは実施例1と同様な方法で進行した。
表面架橋までは実施例1と同様な方法で進行した。
表面架橋までは実施例1と同様な方法で進行した。
表面架橋までは実施例1と同様な方法で進行した。
表面架橋までは実施例1と同様な方法で進行した。
表面架橋までは実施例1と同様な方法で進行した。
表面架橋までは実施例1と同様な方法で進行した。
表面架橋までは実施例1と同様な方法で進行した。
表面架橋までは実施例1と同様な方法で進行した。
表面架橋までは実施例1と同様な方法で進行した。
表面架橋までは実施例1と同様な方法で進行した。
表面架橋までは実施例1と同様な方法で進行した。
表面架橋までは実施例1と同様な方法で進行した。
実施例および比較例で製造した各高吸水性樹脂の物性を次の方法で測定および評価した。
前記高吸水性樹脂を140℃で10分間加熱した。加熱前後の高吸水性樹脂の重量をそれぞれ測定して、「含水率(重量%)=(加熱前の高吸水性樹脂重量−加熱後の高吸水性樹脂重量)/加熱前の高吸水性樹脂重量×100」の式により含水率を測定した。
欧州不織布産業協会(European Disposables and Nonwovens Association、EDANA)規格EDANA WSP 241.3により無荷重下吸水倍率による遠心分離保水能(CRC)を測定した。高吸水性樹脂W0(g、約0.2g)を不織布製の封筒に均一に入れて密封(seal)した後、常温で0.9重量%の塩化ナトリウム水溶液の生理食塩水に浸水させた。30分後に封筒を遠心分離機を利用して250Gで3分間水気を除去した後に封筒の質量W2(g)を測定した。また、高吸水性樹脂を利用せずに同一の操作をした後にその時の質量W1(g)を測定した。このように得られた各質量を利用して次の計算式1によりCRC(g/g)を算出して保水能を確認した。
CRC(g/g)={[W2(g)−W1(g)−W0(g)]/W0(g)}
実施例および比較例の高吸水性樹脂に対して、欧州不織布産業協会(European Disposables and Nonwovens Association)規格EDANA WSP 242.3の方法により加圧吸水能(AUP:Absorbency under Pressure)を測定した。
AUP(g/g)=[W4(g)−W3(g)]/W0(g)
W0(g)は高吸水性樹脂の初期重量(g)であり、
W3(g)は高吸水性樹脂の重量および前記高吸水性樹脂に荷重を付与できる装置重量の総和であり、
W4(g)は荷重(0.7psi)下で1時間にかけて前記高吸水性樹脂に生理食塩水を吸収させた後に、高吸水性樹脂の重量および前記高吸水性樹脂に荷重を付与できる装置重量の総和である。
前述した保水能と、加圧吸収能をそれぞれ表面架橋後、金属陽イオン添加前に一次に測定し、熟成段階まで経た後に二次に測定した。以降、一次および二次にそれぞれ測定された保水能および加圧吸収能から下記式1により吸収度を算出し、一次および二次に測定された吸収度間の差を求めた:
吸収度=CRC+AUP
CRCは、前記高吸水性樹脂の生理食塩水(0.9重量%塩化ナトリウム水溶液)に対する30分間の遠心分離保水能を示し、
AUPは、前記高吸水性樹脂の生理食塩水(0.9重量%塩化ナトリウム水溶液)に対する0.7psi下で1時間の加圧吸収能を示す。
Claims (13)
- 少なくとも一部が中和した酸性基を有する水溶性エチレン系不飽和単量体を内部架橋剤の存在下で架橋重合して含水ゲル重合体を形成する段階;
前記含水ゲル重合体を乾燥、粉砕および分級してベース樹脂粉末を形成する段階;
表面架橋剤の存在下で前記ベース樹脂粉末の表面を追加架橋して表面架橋層を形成する段階;
25℃乃至80℃の温度下で、前記表面架橋されたベース樹脂粉末状に、1価乃至3価の金属陽イオンを添加する段階;および
前記金属陽イオンが添加された結果物を40℃乃至60℃の温度で10乃至30分間維持および熟成させる段階を含む、高吸水性樹脂の製造方法。 - 前記水溶性エチレン系不飽和単量体は、アクリル酸、メタクリル酸、無水マレイン酸、フマル酸、クロトン酸、イタコン酸、2−アクリロイルエタンスルホン酸、2−メタクリロイルエタンスルホン酸、2−(メタ)アクリロイルプロパンスルホン酸、または2−(メタ)アクリルアミド−2−メチルプロパンスルホン酸の陰イオン性単量体とその塩;(メタ)アクリルアミド、N−置換(メタ)アクリレート、2−ヒドロキシエチル(メタ)アクリレート、2−ヒドロキシプロピル(メタ)アクリレート、メトキシポリエチレングリコール(メタ)アクリレートまたはポリエチレングリコール(メタ)アクリレートの非イオン系親水性含有単量体;および(N,N)−ジメチルアミノエチル(メタ)アクリレートまたは(N,N)−ジメチルアミノプロピル(メタ)アクリルアミドのアミノ基含有不飽和単量体とその四級化物;からなる群より選択された1種以上を含む、請求項1に記載の高吸水性樹脂の製造方法。
- 前記内部架橋剤は、N,N’−メチレンビスアクリルアミド、トリメチロールプロパントリ(メタ)アクリレート、エチレングリコールジ(メタ)アクリレート、ポリエチレングリコールジ(メタ)アクリレート、プロピレングリコールジ(メタ)アクリレート、ポリプロピレングリコール(メタ)アクリレート、ブタンジオールジ(メタ)アクリレート、ブチレングリコールジ(メタ)アクリレート、ジエチレングリコールジ(メタ)アクリレート、ヘキサンジオールジ(メタ)アクリレート、トリエチレングリコールジ(メタ)アクリレート、トリプロピレングリコールジ(メタ)アクリレート、テトラエチレングリコールジ(メタ)アクリレート、ジペンタエリスリトールペンタアクリレート、グリセリントリ(メタ)アクリレート、ペンタエリスリトールテトラアクリレート、トリアリールアミン、プロピレングリコール、およびグリセリンからなる群より選択された1種以上を含む、請求項1または2に記載の高吸水性樹脂の製造方法。
- 前記分級されたベース樹脂粉末は、150乃至850μmの粒径を有する、請求項1から3のいずれか一項に記載の高吸水性樹脂の製造方法。
- 前記表面架橋剤は、エチレングリコールジグリシジルエーテル、ポリエチレングリコールジグリシジルエーテル、グリセロールポリグリシジルエーテル、プロピレングリコールジグリシジルエーテル、ポリプロピレングリコールジグリシジルエーテル、エチレンカーボネート、プロピレンカーボネート、ブチレンカーボネート、トリメチレンカーボネート、グリセロールカーボネート、エチレングリコール、ジエチレングリコール、プロピレングリコール、トリエチレングリコール、テトラエチレングリコール、プロパンジオール、ジプロピレングリコール、ポリプロピレングリコール、グリセリン、ポリグリセリン、ブタンジオール、ヘプタンジオール、ヘキサンジオールトリメチロールプロパン、ペンタエリスリトール、ソルビトール、水酸化カルシウム、水酸化マグネシウム、水酸化アルミニウム、水酸化鉄、塩化カルシウム、塩化マグネシウム、塩化アルミニウム、および塩化鉄からなる群より選択された1種以上を含む、請求項1から4のいずれか一項に記載の高吸水性樹脂の製造方法。
- 前記金属陽イオンは、Na+、K+、Li+、Zn2+、Mg2+、Ca2+、およびAl3+からなる群より選択された1種以上を含む、請求項1から5のいずれか一項に記載の高吸水性樹脂の製造方法。
- 前記金属陽イオンを添加する段階は、前記金属陽イオンを含む水溶液を前記表面架橋されたベース樹脂粉末に噴霧するか、または
固体状態の金属陽イオンの塩を前記表面架橋されたベース樹脂粉末と乾式混合し、水を添加する方法で行われる、請求項1から6のいずれか一項に記載の高吸水性樹脂の製造方法。 - 前記金属陽イオンを含む水溶液は、前記金属陽イオンの酸化物、水酸化物、酢酸塩、炭酸塩、硫酸塩およびハロゲン塩からなる群より選択された1種以上の金属陽イオン含有化合物が水溶媒に溶解された水溶液である、請求項7に記載の高吸水性樹脂の製造方法。
- 前記金属陽イオンの塩は、前記金属陽イオンの酸化物、水酸化物、酢酸塩、炭酸塩、硫酸塩およびハロゲン塩からなる群より選択された1種以上の塩化合物である、請求項7に記載の高吸水性樹脂の製造方法。
- 前記金属陽イオン含有化合物または前記金属陽イオンの塩は、前記表面架橋されたベース樹脂粉末の100重量部に対して、0.1乃至3重量部の含有量で添加される、請求項8または9に記載の高吸水性樹脂の製造方法。
- 前記高吸水性樹脂表面には、前記金属陽イオンによりイオン化(deprotonation)された−COO−のイオン性作用基が形成されている、請求項1から10のいずれか一項に記載の高吸水性樹脂の製造方法。
- 前記高吸水性樹脂は、前記金属陽イオンを添加する段階直前に測定された下記式1の吸収度が前記熟成段階後に測定された吸収度より0.2乃至3g/g上昇する、請求項1から11のいずれか一項に記載の高吸水性樹脂の製造方法:
[式1]
吸収度=CRC+AUP
前記式1中、
CRCは、前記高吸水性樹脂の生理食塩水(0.9重量%塩化ナトリウム水溶液)に対する30分間の遠心分離保水能を示し、
AUPは、前記高吸水性樹脂の生理食塩水(0.9重量%塩化ナトリウム水溶液)に対する0.7psi下で1時間の加圧吸収能を示す。 - 前記高吸水性樹脂は、前記熟成段階後に、0.8乃至1.5重量%の含水率を有する、請求項1から12のいずれか一項に記載の高吸水性樹脂の製造方法。
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JP2013507466A (ja) * | 2009-10-09 | 2013-03-04 | ビーエーエスエフ ソシエタス・ヨーロピア | 表面後架橋された吸水性ポリマー粒子の後給湿方法 |
JP2015001402A (ja) * | 2013-06-13 | 2015-01-05 | 大起理化工業株式会社 | 硬度計 |
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US20210229070A1 (en) | 2021-07-29 |
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US11383221B2 (en) | 2022-07-12 |
CN112055723A (zh) | 2020-12-08 |
WO2020122444A1 (ko) | 2020-06-18 |
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