JP2017500381A - 高吸水性樹脂およびその製造方法 - Google Patents
高吸水性樹脂およびその製造方法 Download PDFInfo
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- JP2017500381A JP2017500381A JP2016528243A JP2016528243A JP2017500381A JP 2017500381 A JP2017500381 A JP 2017500381A JP 2016528243 A JP2016528243 A JP 2016528243A JP 2016528243 A JP2016528243 A JP 2016528243A JP 2017500381 A JP2017500381 A JP 2017500381A
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Classifications
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
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- B01J20/265—Synthetic macromolecular compounds modified or post-treated polymers
- B01J20/267—Cross-linked polymers
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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
- B01J20/261—Synthetic macromolecular compounds obtained by reactions only involving carbon to carbon unsaturated bonds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
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Abstract
Description
含水ゲル状重合体の製造
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であるジフェニル(2,4,6−トリメチルベンゾイル)−ホスフィンオキシド0.01g、熱重合開始剤である過硫酸ナトリウム0.18g、および架橋剤である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。このようなモノマー組成物は、恒温槽を用いて40℃に維持し、2軸シリコンベルト形態の回転式ベルトに注入し、ベルト上部に位置した水銀UVランプ光源を用いて10mWの強さで60秒間紫外線を照射した。また反応機は、光重合以降、熱重合が実施される時、内部温度を90℃に維持して熱重合反応が円滑に行われるように熱風と断熱装置をした。
前記実施例1〜3および比較例1〜3で製造された表面架橋前段階の粒子を表面処理して、高吸水性樹脂を製造した。表面処理前段階の粒子100重量部当たり1,3−プロパンジオール1.0重量部および水3.0重量部を含む溶液を噴射混合した。その後、表面架橋反応機に投入して、180℃下で30分間表面架橋反応を進行した。表面架橋反応後、冷却する段階を追加的に経て高吸水性樹脂粉末を得た。
前記比較例1〜比較例3および実施例1〜実施例3による高吸水性樹脂の物性を評価するために下記のような試験を進行した。
前記比較例1〜比較例3および実施例1〜実施例3による高吸水性樹脂W(g)(約0.1g)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質量%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用いて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。得られた各質量を用いて次の式によりCRC(g/g)を算出した。
CRC(g/g)={(W2(g)−W1(g))/W(g)}−1
(2)加圧吸収能(AUP:Absorbency under Pressure)
内径60mmのプラスチックの円筒の底にステンレス製400mesh鉄網を装着させた。常温、湿度50%の条件下で鉄網上に前記比較例1〜比較例3および実施例1〜実施例3による高吸水性樹脂0.90gをそれぞれ均一に散布し、その上に4.83kPa(0.7psi)の荷重を均一にさらに付与できるピストン(piston)は、外径が60mmより若干小さく、円筒の内壁と隙間がなく、上下の動きが妨害されないようにした。この時、前記装置の重量Wa(g)を測定した。
AUP(g/g)=[Wb(g)−Wa(g)]/吸水樹脂の質量(g)
(3)生理食塩水流れ誘導性(SFC:Saline Flow conductivity)
本発明のSFC値は米国特許第5669894号に開示されたSFC試験方法に基づき、前記比較例1〜比較例3および実施例1〜実施例3による高吸水性樹脂に対する、荷重2.07kPaでの0.69重量%塩化ナトリウム水溶液の透水性を測定した。
100mlビーカーに、0.9重量%のNaCl溶液50mlを入れた後、攪拌機を用いて600rpmで攪拌しながら、前記比較例1〜比較例3および実施例1〜実施例3による高吸水性樹脂2.00gをそれぞれ添加する。攪拌によりできる液体のうず巻き(vortex)がなくなり、なめらかな表面ができる時までの時間を測定した。
Claims (21)
- a)水溶性エチレン系不飽和単量体および重合開始剤を含む単量体組成物を熱重合または光重合して含水ゲル状重合体を準備する段階と、
b)前記含水ゲル状重合体を乾燥する段階と、
c)前記乾燥された重合体を粉砕する段階と、
d)前記粉砕された含水ゲル状重合体を粒度150μm未満である粒子、粒度150μm以上300μm未満である粒子、粒度300μm以上450μm未満である粒子、粒度450μm以上600μm以下である粒子、および粒度600μm以上850μm以下である粒子に分級する段階と、
e)前記粉砕された含水ゲル状重合体のうち、粒度600μm以上850μm以下である粒子、粒度300μm以上600μm以下である粒子および粒度150μm以上300μm未満である粒子が混合された正常粒子に、450μm以下の大きさの粒子を用いて再造粒した再造粒体を混合する段階と、
f)前記混合された含水ゲル状重合体のそれぞれに表面架橋剤を添加する段階と、
g)前記含水ゲル状重合体の表面架橋反応を行う段階と、を含み、
前記e)段階の含水ゲル状重合体は、正常粒子と再造粒体の全体総重量を基準に、粒度600〜850μmの大きさの粒子0.01〜3重量%、粒度300〜600μmの大きさの粒子50〜80重量%、粒度150〜300μmの大きさの粒子1〜25重量%および粒度450μm以下の大きさの粒子を用いて再造粒した再造粒体15〜30重量%を含む高吸水性樹脂の製造方法。 - 前記段階e)で、再造粒した再造粒体は、粒度400μm以下の大きさの粒子を用いて再造粒したことを特徴とする、請求項1に記載の高吸水性樹脂の製造方法。
- 前記段階e)の含水ゲル状重合体は、正常粒子と再造粒体の全体総重量を基準に、粒度600〜850μmの大きさの粒子0.1〜2重量%、粒度300〜600μmの大きさの粒子55〜80重量%、粒度150〜300μmの大きさの粒子3〜25重量%および粒度450μm以下の大きさの粒子を用いて再造粒した再造粒体15〜30重量%を含むことを特徴とする、請求項1に記載の高吸水性樹脂の製造方法。
- 前記段階e)で、前記含水ゲル状重合体の表面架橋反応を行う段階は、分級された含水ゲル状重合体を一つの表面架橋反応機で行うことを特徴とする、請求項1に記載の高吸水性樹脂の製造方法。
- 前記段階b)の乾燥段階前に、含水ゲル状重合体を粒度が1mm〜15mmに粉砕する段階をさらに含むことを特徴とする、請求項1に記載の高吸水性樹脂の製造方法。
- 前記段階b)の乾燥段階は、150℃〜250℃の温度で行われることを特徴とする、請求項1に記載の高吸水性樹脂の製造方法。
- 前記表面架橋剤は、多価アルコール化合物;エポキシ化合物;ポリアミン化合物;ハロエポキシ化合物;ハロエポキシ化合物の縮合産物;オキサゾリン化合物;モノ−、ジ−またはポリオキサゾリジノン化合物;環状ウレア化合物;多価金属塩;およびアルキレンカーボネート化合物からなる群より選択されるいずれか一つ以上であることを特徴とする、請求項1に記載の高吸水性樹脂の製造方法。
- 前記段階f)で、前記表面架橋剤は、粉砕された重合体100重量部に対して0.001〜5重量部が添加されることを特徴とする、請求項1に記載の高吸水性樹脂の製造方法。
- 前記段階f)で、前記表面架橋剤を添加する段階で前記重合体の表面温度は、60〜90℃であることを特徴とする、請求項1に記載の高吸水性樹脂の製造方法。
- 前記段階f)で、添加される表面架橋剤の温度は、5〜40℃であることを特徴とする、請求項1に記載の高吸水性樹脂の製造方法。
- 前記段階g)で、前記表面架橋反応は、10分〜120分間行われることを特徴とする、請求項1に記載の高吸水性樹脂の製造方法。
- 前記段階g)で、スチーム、電気、紫外線および赤外線からなる熱源群より選択されるいずれか一つ以上を照射して昇温することを特徴とする、請求項1に記載の高吸水性樹脂の製造方法。
- 前記高吸水性樹脂は、Vortex測定方法により測定した吸水速度が40秒以下であることを特徴とする、請求項1に記載の高吸水性樹脂の製造方法。
- 前記高吸水性樹脂は、50×10-7cm3・s/g以上の食塩水流れ誘導性(a saline flow conductivity、SFC)を有することを特徴とする、請求項1に記載の高吸水性樹脂の製造方法。
- 前記e)段階の再造粒体は、450μm未満の粒子100重量部当たり水50〜300重量部を高速回転するミキサーに投入して30秒〜5分間混合して製造したことを特徴とする、請求項1に記載の高吸水性樹脂の製造方法。
- 水溶性エチレン系不飽和単量体が重合された、粉砕された含水ゲル状重合体を含む高吸水性樹脂であって、
前記粉砕された含水ゲル状重合体のうち、粒度600μm以上850μm以下である粒子、粒度300μm以上600μm以下である粒子および粒度150μm以上300μm未満である粒子が混合された正常粒子と、450μm以下の大きさの粒子を用いて再造粒した再造粒体が表面架橋され、
正常粒子と再造粒体の全体総重量を基準に、粒度600〜850μmの大きさの粒子0.01〜3重量%、粒度300〜600μmの大きさの粒子50〜80重量%、粒度150〜300μmの大きさの粒子1〜25重量%および粒度450μm以下の大きさの粒子を用いて再造粒した再造粒体15〜30重量%を含む高吸水性樹脂。 - 前記再造粒体は、粒度400μm以下の大きさの粒子を用いて再造粒したことを特徴とする、請求項16に記載の高吸水性樹脂
- 前記高吸水性樹脂は、
正常粒子と再造粒体の全体総重量を基準に、粒度600〜850μmの大きさの粒子0.1〜2重量%、粒度300〜600μmの大きさの粒子55〜80重量%、粒度150〜300μmの大きさの粒子3〜25重量%および粒度450μm以下の大きさの粒子を用いて再造粒した再造粒体15〜30重量%を含むことを特徴とする、請求項16に記載の高吸水性樹脂 - 前記高吸水性樹脂は、Vortex測定方法により測定した吸水速度が40秒以下であることを特徴とする、請求項16に記載の高吸水性樹脂。
- 前記高吸水性樹脂は、50×10-7cm3・s/g以上の食塩水流れ誘導性(a saline flow conductivity、SFC)を有することを特徴とする、請求項16に記載の高吸水性樹脂。
- 前記高吸水性樹脂は、請求項1に記載の方法により製造されたことを特徴とする、請求項16に記載の高吸水性樹脂。
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US9937482B2 (en) | 2018-04-10 |
US20160367965A1 (en) | 2016-12-22 |
KR101631298B1 (ko) | 2016-06-16 |
EP3056521A1 (en) | 2016-08-17 |
CN105814089A (zh) | 2016-07-27 |
KR20150068322A (ko) | 2015-06-19 |
TW201538534A (zh) | 2015-10-16 |
TWI582114B (zh) | 2017-05-11 |
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