JP2020093242A - 吸水性樹脂粒子、吸収体及び吸収性物品 - Google Patents
吸水性樹脂粒子、吸収体及び吸収性物品 Download PDFInfo
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- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/42—Use of materials characterised by their function or physical properties
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- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/42—Use of materials characterised by their function or physical properties
- A61L15/60—Liquid-swellable gel-forming materials, e.g. super-absorbents
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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- 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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- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- 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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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- 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
- B01J20/28014—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 form
- B01J20/28016—Particle form
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F120/00—Homopolymers 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
- C08F120/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F120/04—Acids; Metal salts or ammonium salts thereof
- C08F120/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
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- C—CHEMISTRY; METALLURGY
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- C08F20/00—Homopolymers and 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
- C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
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- C08F20/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
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- C—CHEMISTRY; METALLURGY
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- C08F8/00—Chemical modification by after-treatment
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
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- C08F2/00—Processes of polymerisation
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- C08F2810/00—Chemical modification of a polymer
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- 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
Abstract
Description
含水率=[Ww/(Ww+Ws)]×100
Ww:全重合工程の重合前の単量体水溶液に含まれる水分量から、乾燥工程により系外部に排出された水分量を差し引いた量に、凝集剤、表面架橋剤等を混合する際に必要に応じて用いられる水分量を加えた含水ゲル状重合体の水分量。
Ws:含水ゲル状重合体を構成するエチレン性不飽和単量体、架橋剤、開始剤等の材料の仕込量から算出される固形分量。
(実施例1)
還流冷却器、滴下ロート、窒素ガス導入管、及び、撹拌機(翼径5cmの4枚傾斜パドル翼を2段有する撹拌翼)を備えた内径11cm、内容積2Lの丸底円筒型セパラブルフラスコを準備した。このフラスコに、炭化水素分散媒としてn−ヘプタン293gを入れ、高分子系分散剤として無水マレイン酸変性エチレン・プロピレン共重合体(三井化学株式会社製、ハイワックス1105A)0.736gを添加することにより混合物を得た。この混合物を撹拌しつつ80℃まで昇温することにより分散剤を溶解した後、混合物を50℃まで冷却した。
第2段目の含水ゲル状重合体にジエチレントリアミン5酢酸5ナトリウム水溶液を添加した後に、共沸蒸留により系外へ抜き出す水の量を247.9gへ変更したことを除き実施例1と同様の操作を行うことにより吸水性樹脂粒子を231.0g得た。
第1段目の水性液を調製する際に、2,2’−アゾビス(2−アミジノプロパン)2塩酸塩0.092g(0.339ミリモル)を添加し、過硫酸カリウムの使用量を0.018g(0.068ミリモル)に変更し、エチレングリコールジグリシジルエーテルの使用量を0.005g(0.029ミリモル)に変更したこと、第2段目の水性液を調製する際に、2,2’−アゾビス(2−アミジノプロパン)2塩酸塩0.129g(0.475ミリモル)を添加し、過硫酸カリウムの使用量を0.026g(0.095ミリモル)に変更したこと、及び、第2段目の含水ゲル状重合体にジエチレントリアミン5酢酸5ナトリウム水溶液を添加した後に、共沸蒸留により系外へ抜き出す水の量を217.8gへ変更したことを除き実施例1と同様の操作を行うことにより吸水性樹脂粒子を229.6g得た。
第2段目の水性液を調製する際に、水溶性ラジカル重合開始剤に加えて、内部架橋剤としてエチレングリコールジグリシジルエーテル0.0116g(0.067ミリモル)を添加したこと、第2段目の含水ゲル状重合体を得る際に、重合反応を60分間行った後にエチレングリコールジグリシジルエーテル水溶液を添加しなかったこと、及び、第2段目の含水ゲル状重合体にジエチレントリアミン5酢酸5ナトリウム水溶液を添加した後に、共沸蒸留により系外へ抜き出す水の量を278.9gへ変更したことを除き実施例1と同様の操作を行うことにより吸水性樹脂粒子を230.8g得た。
塩化ナトリウム(NaCl)を0.01質量%含む水溶液、塩化カリウム(KCl)を0.01質量%含む水溶液、塩化マグネシウム(MgCl2)を0.01質量%含む水溶液、及び、塩化カルシウム(CaCl2)を0.01質量%含む水溶液を各々調製した。次に、2Lビーカー内に設置した綿袋(メンブロード60番、155mm×370mm)内に上述の吸水性樹脂粒子2.0gを入れた後、各水溶液2000mLを綿袋内に流し込むと同時に綿袋の全体を水溶液に浸漬させた。綿袋の上部を輪ゴムで縛り、30分静置させることで吸水性樹脂粒子を膨潤させた。30分経過後の綿袋を、遠心力を167Gに設定した脱水機(株式会社コクサン製、品番:H−122)を用いて1分間脱水した。そして、脱水後の膨潤ゲルを含んだ綿袋の質量Wa(g)を測定した。吸水性樹脂粒子を添加せずに同様の操作を行い、綿袋の湿潤時の空質量Wb(g)を測定した。下記式から吸水性樹脂粒子の保水量(単位質量あたりの保水量)を算出した。また、4種の水溶液の保水量の間の標準偏差を算出した。結果を表1に示す。
保水量[g/g]=(Wa−Wb)/2
気流型混合装置(有限会社オーテック製、パッドフォーマー)を用いて、上述の吸水性樹脂粒子10g及び粉砕パルプ10gを空気抄造によって均一混合することにより、40cm×12cmの大きさのシート状の吸収体を作製した。
温度25±2℃の室内において、吸収体の中心部に内径3cmの液投入用シリンダーを置いた。次に、シリンダー内に25±1℃に調整した試験液80mLを一度に投入すると共にストップウォッチをスタートさせた後、投入開始から液が吸収体に完全に吸収されるまでの吸収時間を測定した。この操作を30分間隔で更に2回(計3回)行い、吸収時間の合計値を浸透速度(秒)として得た。下記表2に示す試験液A及び試験液Bを用いて、それぞれの試験液について浸透速度を評価した。2種の試験液においてダイワ化成株式会社製の青色1号を用いた。試験液Bにおいて1質量%トリトンX溶液として、和光純薬工業株式会社製のトリトンX−100と水との混合物を用いた。また、2種の試験液の浸透速度の間の標準偏差を算出した。結果を表1に示す。
Claims (5)
- 0.01質量%のナトリウム塩水溶液の保水量、0.01質量%のカリウム塩水溶液の保水量、0.01質量%のマグネシウム塩水溶液の保水量、及び、0.01質量%のカルシウム塩水溶液の保水量の間の標準偏差が20g/g以下である、吸水性樹脂粒子。
- 0.01質量%のナトリウム塩水溶液の保水量、0.01質量%のカリウム塩水溶液の保水量、0.01質量%のマグネシウム塩水溶液の保水量、及び、0.01質量%のカルシウム塩水溶液の保水量からなる群より選ばれる少なくとも一種が150g/g以上である、請求項1に記載の吸水性樹脂粒子。
- 請求項1又は2に記載の吸水性樹脂粒子を含有する、吸収体。
- 請求項3に記載の吸収体を備える、吸収性物品。
- おむつである、請求項4に記載の吸収性物品。
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KR1020217019039A KR20210101240A (ko) | 2018-12-12 | 2019-12-12 | 흡수성 수지 입자, 흡수체 및 흡수성 물품 |
CN201980082025.1A CN113166308A (zh) | 2018-12-12 | 2019-12-12 | 吸水性树脂颗粒、吸收体及吸收性物品 |
PCT/JP2019/048819 WO2020122216A1 (ja) | 2018-12-12 | 2019-12-12 | 吸水性樹脂粒子、吸収体及び吸収性物品 |
EP19895077.6A EP3896094A1 (en) | 2018-12-12 | 2019-12-12 | Water-absorbent resin particles, absorber, and absorbent article |
US17/311,283 US20220015957A1 (en) | 2018-12-12 | 2019-12-12 | Water-absorbent resin particles, absorber, and absorbent article |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03247293A (ja) * | 1990-02-27 | 1991-11-05 | Japan Synthetic Rubber Co Ltd | 吸水性高分子量物質の製造法 |
JP2003088552A (ja) * | 2001-09-19 | 2003-03-25 | Sumitomo Seika Chem Co Ltd | 吸収体およびそれを用いた吸収性物品 |
WO2018181565A1 (ja) * | 2017-03-31 | 2018-10-04 | 住友精化株式会社 | 吸水性樹脂粒子 |
Family Cites Families (3)
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JPH06345819A (ja) | 1993-06-08 | 1994-12-20 | Nippon Synthetic Chem Ind Co Ltd:The | 高吸水性樹脂の製造法 |
US5599335A (en) | 1994-03-29 | 1997-02-04 | The Procter & Gamble Company | Absorbent members for body fluids having good wet integrity and relatively high concentrations of hydrogel-forming absorbent polymer |
TW200712114A (en) * | 2005-09-30 | 2007-04-01 | Nippon Catalytic Chem Ind | Method for manufacturing particulate water-absorbing agent and particulate water-absorbing agent |
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2019
- 2019-03-22 JP JP2019054973A patent/JP6738452B2/ja active Active
- 2019-12-12 EP EP19895077.6A patent/EP3896094A1/en not_active Withdrawn
- 2019-12-12 CN CN201980082025.1A patent/CN113166308A/zh active Pending
- 2019-12-12 KR KR1020217019039A patent/KR20210101240A/ko unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03247293A (ja) * | 1990-02-27 | 1991-11-05 | Japan Synthetic Rubber Co Ltd | 吸水性高分子量物質の製造法 |
JP2003088552A (ja) * | 2001-09-19 | 2003-03-25 | Sumitomo Seika Chem Co Ltd | 吸収体およびそれを用いた吸収性物品 |
WO2018181565A1 (ja) * | 2017-03-31 | 2018-10-04 | 住友精化株式会社 | 吸水性樹脂粒子 |
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CN113166308A (zh) | 2021-07-23 |
EP3896094A1 (en) | 2021-10-20 |
JP6738452B2 (ja) | 2020-08-12 |
KR20210101240A (ko) | 2021-08-18 |
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