JP6820862B2 - 超吸収体粒子を凝集させる方法 - Google Patents
超吸収体粒子を凝集させる方法 Download PDFInfo
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- JP6820862B2 JP6820862B2 JP2017552921A JP2017552921A JP6820862B2 JP 6820862 B2 JP6820862 B2 JP 6820862B2 JP 2017552921 A JP2017552921 A JP 2017552921A JP 2017552921 A JP2017552921 A JP 2017552921A JP 6820862 B2 JP6820862 B2 JP 6820862B2
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- 238000003860 storage Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 229940035023 sucrose monostearate Drugs 0.000 description 1
- 150000005846 sugar alcohols Chemical class 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 229940095064 tartrate Drugs 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 229960000984 tocofersolan Drugs 0.000 description 1
- AOBORMOPSGHCAX-DGHZZKTQSA-N tocofersolan Chemical compound OCCOC(=O)CCC(=O)OC1=C(C)C(C)=C2O[C@](CCC[C@H](C)CCC[C@H](C)CCCC(C)C)(C)CCC2=C1C AOBORMOPSGHCAX-DGHZZKTQSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- 235000019731 tricalcium phosphate Nutrition 0.000 description 1
- 229940078499 tricalcium phosphate Drugs 0.000 description 1
- 229910000391 tricalcium phosphate Inorganic materials 0.000 description 1
- 239000001226 triphosphate Substances 0.000 description 1
- VXYADVIJALMOEQ-UHFFFAOYSA-K tris(lactato)aluminium Chemical compound CC(O)C(=O)O[Al](OC(=O)C(C)O)OC(=O)C(C)O VXYADVIJALMOEQ-UHFFFAOYSA-K 0.000 description 1
- 229940046009 vitamin E Drugs 0.000 description 1
- 235000019165 vitamin E Nutrition 0.000 description 1
- 239000011709 vitamin E Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 229920001285 xanthan gum Polymers 0.000 description 1
- 239000000811 xylitol Substances 0.000 description 1
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 description 1
- 235000010447 xylitol Nutrition 0.000 description 1
- 229960002675 xylitol Drugs 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 239000002076 α-tocopherol Substances 0.000 description 1
- 235000004835 α-tocopherol Nutrition 0.000 description 1
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- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/02—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of acids, salts or anhydrides
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- 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
- A61L15/60—Liquid-swellable gel-forming materials, e.g. super-absorbents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- 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
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- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
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- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
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- C08F6/00—Post-polymerisation treatments
- C08F6/14—Treatment of polymer emulsions
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Description
a)少なくとも部分的に中和されていてよい、少なくとも1種のエチレン性不飽和の酸基含有モノマー、
b)任意で、1種または複数の架橋剤、
c)少なくとも1種の開始剤、
d)任意で、1種または複数の、a)に挙げたモノマーと共重合可能なエチレン性不飽和モノマー、および
e)任意で、1種または複数の水溶性ポリマー
を含有するモノマー水溶液1を重合させ、得られるポリマー粒子を任意で乾燥させ、かつ/または粉砕する、超吸収体粒子を凝集させる方法において、250μmまたはそれ未満の粒径を有するポリマー粒子を分離し、分離したポリマー粒子を疎水性有機溶媒中に分散させ、分散させたポリマー粒子を、
a)少なくとも部分的に中和されていてよい、少なくとも1種のエチレン性不飽和の酸基含有モノマー、
b)任意で、1種または複数の架橋剤、
c)少なくとも1種の開始剤、
d)任意で、1種または複数の、a)に挙げたモノマーと共重合可能なエチレン性不飽和モノマー、および
e)任意で、1種または複数の水溶性ポリマー
を含有するモノマー水溶液2と混合し、モノマー溶液1およびモノマー溶液2は同じであっても、または異なっていてもよく、分散させたポリマー粒子に付与される水の合計量が、分散させたポリマー粒子を基準として少なくとも100質量%であり、そしてモノマー溶液2を重合させることを特徴とする前記方法。
特に記載のない限り、23±2℃の周囲温度、50±10%の相対湿度で測定するものとする。吸水性ポリマーを、測定前に十分に混合する。
超吸収体粒子の含水量を、EDANAにより推奨される試験法No.WSP230.3(11)「Mass Loss Upon Heating」に従って決定する。
遠心分離保持容量(CRC)を、EDANAにより推奨される試験法No.WSP241.3(11)「Fluid Retention Capacity in Saline,After Centrifugation」に従って決定する。
膨潤速度(FSR)を決定するために、1.00g(=W1)の吸水性ポリマー粒子を25mlビーカーに秤量して入れ、ビーカーの底部に均一に分配する。そして、0.9質量%の食塩水20mlをディスペンサにより第2のビーカー中に計量供給し、このビーカーの内容物を第1のビーカーに迅速に追加し、ストップウォッチで計時を開始する。食塩水の最後の液滴が吸収されたら(このことは、液体表面における反射が消滅することで認識される)、ストップウォッチを止める。第2のビーカーから流し込まれ、第1のビーカー中のポリマーによって吸収された正確な液体量を、第2のビーカーを再計量することによって正確に決定した(=W2)。ストップウォッチで測定された、吸収に必要とされる時間間隔をtとして表す。表面上における最後の液滴の消滅を、時点tとして決定する。
平均粒径および粒径分布(σζ)幅を欧州特許第0349240号明細書(EP0349240B1)と同様に決定し、ここで100μm、200μm、300μm、400μm、450μm、500μm、600μm、710μm、800μm、900μm、1000μm、1180μm、1400μm、1600μm、1700μm、2000μmおよび4000μmのメッシュ幅を有する篩を使用した。
平均球形度(mSPHT)を、PartAn(登録商標)3001L粒子分析器(Microtrac Europe GmbH;DE)を用いて決定する。
プロペラ式撹拌機および還流冷却器を備える2Lのセパラブル容器(Planschliffgefaess)に、シクロヘキサン896.00gおよびエチルセルロース6.00gを予め装入し、撹拌および窒素導入下で75℃に加熱した。
プロペラ式撹拌機および還流冷却器を備える2Lのセパラブル容器に、シクロヘキサン500.00g、Span(登録商標)20(モノステアリン酸ソルビタン)1.88gおよび実施例1からの超吸収体粒子60.00gを予め装入し、撹拌および窒素導入下で70℃に加熱した。
プロペラ式撹拌機および還流冷却器を備える2Lのセパラブル容器に、n−ヘプタン500.00g、ステアリン酸スクロース(Ryoto(登録商標)Sugar Ester S−370、Mitsubishi Chemical Europe GmbH、Duesseldorf、ドイツ)0.92gおよび超吸収体粒子60.00gを予め装入し、ステアリン酸スクロースが完全に溶解するまで、撹拌および窒素導入下で70℃の内部温度に加熱した。
実施例3のように操作し、ここでアクリル酸50.00g(0.694mol)、50質量%の水酸化ナトリウム水溶液43.00g(0.538mol)、水75.60g、Ν,Ν‘−メチレンビスアクリルアミド(MBA)0.0125g(0.081mmol)およびペルオキソ二硫酸カリウム0.167g(0.618mmol)から調製されるモノマー溶液2を使用した。
実施例3のように操作し、ここでアクリル酸50.00g(0.694mol)、50質量%の水酸化ナトリウム水溶液43.00g(0.538mol)、水93.60g、Ν,Ν‘−メチレンビスアクリルアミド(MBA)0.0125g(0.081mmol)およびペルオキソ二硫酸カリウム0.167g(0.618mmol)から調製されるモノマー溶液2を使用した。
Claims (15)
- a)少なくとも部分的に中和されていてよい、少なくとも1種のエチレン性不飽和の酸基含有モノマー、
b)任意で、1種または複数の架橋剤、
c)少なくとも1種の開始剤、
d)任意で、1種または複数の、a)に挙げたモノマーと共重合可能なエチレン性不飽和モノマー、および
e)任意で、1種または複数の水溶性ポリマー
を含有するモノマー水溶液1を重合させ、
得られるポリマー粒子を任意で乾燥させ、かつ/または粉砕し、
250μmまたはそれ未満の粒径を有するポリマー粒子を分離し、
分離した前記ポリマー粒子を疎水性有機溶媒中に分散させ、
分散させた前記ポリマー粒子を、
i)少なくとも部分的に中和されていてよい、少なくとも1種のエチレン性不飽和の酸基含有モノマー、
ii)任意で、1種または複数の架橋剤、
iii)少なくとも1種の開始剤、
iv)任意で、1種または複数の、i)に挙げたモノマーと共重合可能なエチレン性不飽和モノマー、および
v)任意で、1種または複数の水溶性ポリマー
を含有するモノマー水溶液2と混合し、前記モノマー水溶液1および前記モノマー水溶液2は同じであっても、または異なっていてもよく、分散させた前記ポリマー粒子に前記モノマー水溶液2と共に付与される水の合計量が、分散させた前記ポリマー粒子を基準として少なくとも100質量%であり、前記モノマー水溶液2に含まれる前記モノマーi)の量は、分散させた前記ポリマー粒子の量を基準として、5〜80質量%であり、かつ
前記モノマー水溶液2を重合させることを特徴とする、
超吸収体粒子を凝集させる方法。 - 200μmまたはそれ未満の粒径を有するポリマー粒子を分離することを特徴とする、請求項1記載の方法。
- 150μmまたはそれ未満の粒径を有するポリマー粒子を分離することを特徴とする、請求項1記載の方法。
- 前記モノマー水溶液2と共に付与される水の量が、分散させた前記ポリマー粒子を基準として少なくとも150質量%であることを特徴とする、請求項1から3までのいずれか1項記載の方法。
- 前記モノマー水溶液2と共に付与される水の量が、分散させた前記ポリマー粒子を基準として少なくとも175質量%であることを特徴とする、請求項1から3までのいずれか1項記載の方法。
- 前記モノマー水溶液2が、1molのモノマーi)を基準として0.01〜0.50mmolの架橋剤ii)を含有することを特徴とする、請求項1から5までのいずれか1項記載の方法。
- 前記モノマー水溶液2が、1molのモノマーi)を基準として0.02〜0.25mmolの架橋剤ii)を含有することを特徴とする、請求項1から5までのいずれか1項記載の方法。
- 前記モノマー水溶液2が、1molのモノマーi)を基準として0.05〜0.15mmolの架橋剤ii)を含有することを特徴とする、請求項1から5までのいずれか1項記載の方法。
- 前記モノマー水溶液1を液滴重合によって重合させることを特徴とする、請求項1から8までのいずれか1項記載の方法。
- 前記ポリマー粒子を、フィルターまたはサイクロンを用いて液滴重合の排ガスから分離することを特徴とする、請求項9記載の方法。
- 前記モノマー水溶液1を懸濁重合によって重合させ、得られるポリマー粒子を乾燥させることを特徴とする、請求項1から8までのいずれか1項記載の方法。
- 前記モノマー水溶液1を溶液重合によって重合させ、得られるポリマー粒子を乾燥させ、粉砕することを特徴とする、請求項1から8までのいずれか1項記載の方法。
- 前記ポリマー粒子を、250μmまたはそれ未満のメッシュ幅を有する篩を用いて分離することを特徴とする、請求項11または12記載の方法。
- 前記ポリマー粒子を、200μmまたはそれ未満のメッシュ幅を有する篩を用いて分離することを特徴とする、請求項11または12記載の方法。
- 前記ポリマー粒子を、150μmまたはそれ未満のメッシュ幅を有する篩を用いて分離することを特徴とする、請求項11または12記載の方法。
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JPS6018690B2 (ja) | 1981-12-30 | 1985-05-11 | 住友精化株式会社 | 吸水性樹脂の吸水性改良方法 |
JPS58180233A (ja) | 1982-04-19 | 1983-10-21 | Nippon Shokubai Kagaku Kogyo Co Ltd | 吸収剤 |
US4734478A (en) | 1984-07-02 | 1988-03-29 | Nippon Shokubai Kagaku Kogyo Co., Ltd. | Water absorbing agent |
DE3713601A1 (de) | 1987-04-23 | 1988-11-10 | Stockhausen Chem Fab Gmbh | Verfahren zur herstellung eines stark wasserabsorbierenden polymerisats |
GB2208387B (en) | 1987-07-28 | 1990-11-14 | Dai Ichi Kogyo Seiyaku Co Ltd | Process for continuously preparing acrylic polymer gel |
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CA2038779A1 (en) | 1990-04-02 | 1991-10-03 | Takumi Hatsuda | Method for production of fluid stable aggregate |
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US20180126032A1 (en) | 2018-05-10 |
WO2016162218A1 (de) | 2016-10-13 |
US10835634B2 (en) | 2020-11-17 |
EP3280743A1 (de) | 2018-02-14 |
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