JP2016532001A - 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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- JP2016532001A JP2016532001A JP2016545696A JP2016545696A JP2016532001A JP 2016532001 A JP2016532001 A JP 2016532001A JP 2016545696 A JP2016545696 A JP 2016545696A JP 2016545696 A JP2016545696 A JP 2016545696A JP 2016532001 A JP2016532001 A JP 2016532001A
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- polymer
- superabsorbent resin
- producing
- water
- photopolymerization
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- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
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- 239000008096 xylene Substances 0.000 description 1
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- C08F2/00—Processes of polymerisation
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- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
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- C08F2/00—Processes of polymerisation
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- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
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- C08F6/00—Post-polymerisation treatments
- C08F6/008—Treatment of solid polymer wetted by water or organic solvents, e.g. coagulum, filter cakes
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- 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
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- C08J3/075—Macromolecular gels
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/12—Compositions of unspecified macromolecular compounds characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity
- C08L101/14—Compositions of unspecified macromolecular compounds characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity the macromolecular compounds being water soluble or water swellable, e.g. aqueous gels
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- C08J2300/00—Characterised by the use of unspecified polymers
- C08J2300/14—Water soluble or water swellable polymers, e.g. aqueous gels
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Abstract
Description
実施例1
アクリル酸単量体100g、苛性ソーダ(NaOH)38.9gおよび水103.9gを混合し、前記混合物に光重合開始剤のジフェニル(2,4,6−トリメチルベンゾイル)−ホスフィンオキシド0.01g、熱重合開始剤の過硫酸ナトリウム0.18gおよび架橋剤のポリエチレングリコールジアクリレート0.30gを添加してモノマー組成物を準備した。
実施例1で、モノマー組成物の初期温度を恒温槽を用いて50℃で維持したことを除いては実施例1と同様な方法で高吸水性樹脂を製造した。
実施例1で、モノマー組成物の初期温度を恒温槽を用いて35℃で維持したことを除いては実施例1と同様な方法で高吸水性樹脂を製造した。
実施例1で、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を0.005gを使用したことを除いては実施例1と同様な方法で高吸水性樹脂を製造した。
実施例1で、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の代わりにルシリンTPO(lucirin TPO)0.01gを使用したことを除いては実施例1と同様な方法で高吸水性樹脂を製造した。
実施例1で、過硫酸ナトリウムを0.07gを使用したことを除いては実施例1と同様な方法で高吸水性樹脂を製造した。
実施例1で、モノマー組成物の初期温度を恒温槽を用いて80℃で維持したことを除いては実施例1と同様な方法で高吸水性樹脂を製造した。
実施例1で、モノマー組成物の初期温度を恒温槽を用いて25℃で維持したことを除いては実施例1と同様な方法で高吸水性樹脂を製造した。
実施例1で、反応機の内部温度を50℃で維持したことを除いては実施例1と同様な方法で高吸水性樹脂を製造した。
保水能、加圧吸水能および水可溶成分測定
保水能測定はEDANA法WSP241.2に従った。30〜50メッシュに分級した高吸水性樹脂0.2gをティーバッグに入れて30分間0.9%塩水溶液にふやかした後、250Gに設定された遠心分離機で3分間水を除去し重量を測って、高吸水性樹脂が保有している水の量を測定する方式で保水能を測定した。
Claims (10)
- 水溶性エチレン系不飽和単量体、熱重合開始剤および光重合開始剤を含むモノマー組成物に対して30乃至55℃の温度で光重合を行う段階;
55乃至120℃の温度で熱重合および光重合を行って含水ゲル状重合体を形成する段階;および
前記含水ゲル状重合体を乾燥する段階を含む高吸水性樹脂の製造方法。 - 前記熱重合開始剤は、過硫酸塩系開始剤、アゾ系開始剤、過酸化水素およびアスコルビン酸からなる群より選択される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。
- 前記光重合開始剤は、ベンゾインエーテル(benzoin ether)、ジアルキルアセトフェノン(dialkyl acetophenone)、ヒドロキシルアルキルケトン(hydroxyl alkylketone)、フェニルグリオキシレート(phenyl glyoxylate)、ベンジルジメチルケタール(Benzyl Dimethyl Ketal)、アシルホスフィン(acyl phosphine)およびアルファ−アミノケトン(α−aminoketone)からなる群より選択される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。
- 前記含水ゲル状重合体の含水率は40乃至80重量%である請求項1に記載の高吸水性樹脂の製造方法。
- 前記含水ゲル状重合体の乾燥段階前に、含水ゲル状重合体を粒径が2乃至10mmになるように粉砕する段階をさらに含む請求項1に記載の高吸水性樹脂の製造方法。
- 前記含水ゲル状重合体の乾燥は150乃至250℃の温度で行われる請求項1に記載の高吸水性樹脂の製造方法。
- 乾燥された重合体を粉砕する段階;および
粉砕された重合体に対して表面架橋反応を行う段階をさらに含む請求項1に記載の高吸水性樹脂の製造方法。 - 前記乾燥された重合体の粉砕は、粉砕された重合体の粒径が150乃至850μmになるように行われる請求項7に記載の高吸水性樹脂の製造方法。
- 前記粉砕された重合体を粒径が150乃至850μmである重合体に分級する段階を追加的に含む請求項7に記載の高吸水性樹脂の製造方法。
- 前記高吸水性樹脂は、34乃至37g/gの保水能、および24乃至27g/gの加圧吸水能および11乃至13重量%の水可溶成分含量を有する請求項1に記載の高吸水性樹脂の製造方法。
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US10285866B2 (en) | 2015-01-16 | 2019-05-14 | Lg Chem, Ltd. | Super absorbent polymer |
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