JP7475764B2 - 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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- JP7475764B2 JP7475764B2 JP2022524006A JP2022524006A JP7475764B2 JP 7475764 B2 JP7475764 B2 JP 7475764B2 JP 2022524006 A JP2022524006 A JP 2022524006A JP 2022524006 A JP2022524006 A JP 2022524006A JP 7475764 B2 JP7475764 B2 JP 7475764B2
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- resin powder
- monomer
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- antibacterial
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Description
本出願は、2019年11月13日付の韓国特許出願第10-2019-0145146号、2020年5月7日付の韓国特許出願第10-2020-0054684号、および2020年11月12日付の韓国特許出願第10-2020-0151154号に基づく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すべての内容は本明細書の一部として含まれる。
表面架橋剤を介在して前記架橋重合体が追加架橋されて、前記ベース樹脂粉末上に形成された表面架橋層;を含み、
前記重合性抗菌単量体は、グアニジンアクリレートおよびその塩のうちの1種以上を含む、高吸水性樹脂を提供する。
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;および
表面架橋剤の存在下で、前記ベース樹脂粉末を熱処理して追加架橋する段階を含み、
前記重合性抗菌単量体は、グアニジンアクリレートおよびその塩のうちの1種以上を含む、前記高吸水性樹脂の製造方法を提供する。
酸性基を含み、前記酸性基の少なくとも一部が中和された水溶性エチレン系不飽和単量体と、重合性抗菌単量体との架橋重合体を含むベース樹脂粉末;および
表面架橋剤を介在して前記架橋重合体が追加架橋されて、前記ベース樹脂粉末上に形成された表面架橋層;を含み、
前記重合性抗菌単量体は、グアニジンアクリレートおよびその塩のうちの1種以上を含む。
R11およびR12は、それぞれ独立して、水素、または炭素数1~20のアルキル基であり、
R21およびR22は、それぞれ独立して、水素、または炭素数1~20のアルキル基である。
バクテリア増殖率(%)=[CFUsample/CFUreference]×100
製造例1
水100重量部に対して、アクリル酸19重量部、グアニジンヒドロクロライド(guanidine hydrochloride)10.8重量部、ナトリウムメトキシド(sodium methoxide)20重量部を混合後、常温で15時間撹拌して反応させた。反応が終了した後、結果の溶液にアセトンを添加して白色の副産物(NaCl)を除去し、以後、フィルタでろ過した。結果のろ過液に対して常温でロータリーエバポレーター(Rotary evaporator)を用いてアセトンを除去して、下記の構造のグアニジンアクリレート(GA)(i)を重合性抗菌単量体として得た。
水100重量部に対して、アクリル酸19重量部、グアニジンカーボネート(guanidine carbonate)14.4重量部を混合後、常温で15時間撹拌して反応させた。反応が終了した後、結果の溶液中の溶媒をロータリーエバポレーター(Rotary evaporator)を用いてすべて除去した後、アセトンを添加して再結晶を進行させた。以後、フィルタでろ過して、下記の構造のグアニジンアクリレートの塩(GAS)(ii)を重合性抗菌単量体として得た。得られた重合性抗菌単量体は固形分の形態であり、必要な場合、製造例1と同一の濃度で水に溶解して使用した。
前記製造例1において、アクリル酸の代わりにメチルメタクリレートを9.5重量部用いることを除けば、製造例1と同様の方法で行って、下記の構造のグアニジンメタクリレートの抗菌単量体(MGU)(iii)を得た。得られた抗菌単量体は水に溶解した状態で存在し、その濃度は2μg/10mlであった。
前記製造例2において、アクリル酸の代わりにメタクリル酸を18重量部に変更させることを除けば、前記製造例2と同様の方法で行って、下記の構造のグアニジンメタクリレートの塩(GMA)(iv)を重合性抗菌単量体として得た。得られた抗菌単量体は固形分の形態であり、必要な場合、製造例1と同一の濃度で水に溶解して使用した。また、得られた重合性抗菌単量体に対する1H NMR分析結果を図4に示した(500MHz,DMSO-d6,δ[ppm])。
実施例1
撹拌機、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100重量部、内部架橋剤としてポリエチレングリコールジアクリレート(Mn=575)0.23重量部、光開始剤としてビス(2,4,6-トリメチルベンゾイル)-フェニルホスフィンオキシド0.008重量部、熱開始剤としてナトリウムペルスルフェート(SPS)0.12重量部、98%水酸化ナトリウム溶液39.7重量部、そして前記製造例1で製造したグアニジンアクリレート(GA)1重量部を添加し、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。
前記実施例1において、グアニジンアクリレート2重量部を添加したことを除けば、実施例1と同様の方法を用いて高吸水性樹脂を製造した。
前記実施例2において、グアニジンアクリレートの代わりに前記製造例2で製造したグアニジンアクリレートの塩(GAS)を用いたことを除けば、実施例2と同様の方法を用いて高吸水性樹脂を製造した。
前記実施例1において、重合性抗菌単量体を用いないことを除けば、実施例1と同様の方法を用いて高吸水性樹脂を製造した。
前記実施例2において、グアニジンアクリレートの代わりに前記比較製造例2で製造したグアニジンメタクリレートの塩(GMA)を用いたことを除けば、実施例2と同様の方法を用いて高吸水性樹脂を製造した。
前記実施例2において、グアニジンアクリレートの代わりに前記比較製造例1で製造したグアニジンメタクリレート(MGU)を用いたことを除けば、実施例2と同様の方法を用いて高吸水性樹脂を製造した。
前記比較例1で製造した高吸水性樹脂100重量部に対して、前記製造例1で製造したグアニジンアクリレート(GA)2重量部を単純混合(実施例1で製造した高吸水性樹脂内に使用された抗菌単量体と同等比率となるように混合)した。
前記実施例および比較例で製造した高吸水性樹脂に対して、次の方法で物性を評価した。
欧州不織布産業協会(European Disposables and Nonwovens Association、EDANA)規格EDANA WSP241.3により、各実施例および比較例の高吸水性樹脂それぞれの無荷重下吸水倍率による遠心分離保水能を測定した。
CRC(g/g)={[W2(g)-W1(g)]/W0(g)}-1
W0(g)は、高吸水性樹脂の初期重量(g)であり、
W1(g)は、高吸水性樹脂を用いず、生理食塩水に前記封筒を30分間浸して吸収させた後、遠心分離機を用いて250Gで3分間脱水した後に測定した封筒の重量であり、
W2(g)は、常温で生理食塩水に高吸水性樹脂を30分間浸して吸収させた後、遠心分離機を用いて250Gで3分間脱水した後に、高吸水性樹脂を含んで測定した封筒の重量である。
Proteus Mirabilis(ATCC29906)が3000CFU/mlで接種された人工尿50mlを35℃の培養器で12時間培養した。菌接種直後の人工尿および12時間後の人工尿を対照群とし、150mlの塩水(0.9重量%塩化ナトリウム水溶液)でよく洗浄して、Nutrient broth agar(BD DIFCO.)plateに培養してCFU(Colony Forming Unit;CFU/ml)を測定して、これによって対照群の物性で算出した。
バクテリア増殖率(%)=[CFUsample/CFUreference]×100
高吸水性樹脂のアンモニア発生抑制効果を評価するために、実施例または比較例の高吸水性樹脂2gを、前記Proteus Mirabilis(ATCC29906)が3000CFU/mlで接種された人工尿50mlに加え、35℃の培養器で12時間培養した。培養が終了した試料に150mlの塩水(0.9重量%塩化ナトリウム水溶液)を追加し、1分間振って均等に混ざるようにした。結果の希釈溶液のpHをpHメーターを用いて測定した。
前記実施例で製造した高吸水性樹脂における抗菌単量体の流出の有無を確認した。
選択クロマトグラフィーカラム(select chromatographic column):Trinity P2 column
仕様(specification):4.6mm ID×50mm L、3μm
移動相(Mobile phase) A:体積分率(volume fraction)=蒸留水(distilled water)(100v/v%)
移動相(Mobile phase) B:100mM ギ酸アンモニウム(Ammonium formate)(pH3.8)100v/v%
流速(Flow velocity) 0.6mL/min
カラム温度(column temperature) 40℃
サンプル注入体積(sample injection volume):50μL
グラジエント溶離(Gradient elution):以下、表1の通りである。
モード(Mode):SIM mode(m/z=60)
選択クロマトグラフィーカラム(select chromatographic column):Trinity P2 column
仕様(specification):4.6mm ID×50mm L、3μm
移動相(Mobile phase) A:体積分率(volume fraction)=蒸留水(distilled water)(100v/v%)
移動相(Mobile phase) B:100mM ギ酸アンモニウム(Ammonium formate)(pH3.8)100v/v%
流速(Flow velocity):0.6mL/min
カラム温度(column temperature):40℃
サンプル注入体積(sample injection volume):2μL;
グラジエント溶離(Gradient elution):以下、表2の通りである。
GAS Pressure:6.18psi
Charger voltage:2.27kV
Charger current:0.99μA
Flow mode:Normal
Ion trap:20.2V.
前記実施例および比較例で製造した高吸水性樹脂に対して、次の方法で消臭評価を行った。
Claims (9)
- 酸性基を含み、前記酸性基の少なくとも一部が中和された水溶性エチレン系不飽和単量体と、重合性抗菌単量体との架橋重合体を含むベース樹脂粉末;および
表面架橋剤を介在して前記架橋重合体が追加架橋されて、前記ベース樹脂粉末上に形成された表面架橋層;を含み、
前記重合性抗菌単量体は、下記の化学式1で表される化合物および下記の化学式2で表される化合物のうちの1以上の化合物を含む、
高吸水性樹脂粉末:
R11およびR12は、それぞれ独立して、水素、または炭素数1~20のアルキル基である。
R21およびR22は、それぞれ独立して、水素、または炭素数1~20のアルキル基である。 - 前記重合性抗菌単量体は、下記の化学式で表される化合物のうちの1種以上を含む、請求項1に記載の高吸水性樹脂粉末:
- 前記高吸水性樹脂粉末は、EDANA法WSP241.3により測定した生理食塩水(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が29~50g/gであり、グラム陰性菌に対して抗菌性を示す、請求項1または2に記載の高吸水性樹脂粉末。
- 前記グラム陰性菌は、プロテウスミラビリスまたは大腸菌である、請求項3に記載の高吸水性樹脂粉末。
- 酸性基を含み、前記酸性基の少なくとも一部が中和された水溶性エチレン系不飽和単量体を重合性抗菌単量体と、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;および
表面架橋剤の存在下で、前記ベース樹脂粉末を熱処理して追加架橋する段階を含み、
前記重合性抗菌単量体は、下記の化学式1で表される化合物および下記の化学式2で表される化合物のうちの1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粉末の製造方法:
R11およびR12は、それぞれ独立して、水素、または炭素数1~20のアルキル基である。
R21およびR22は、それぞれ独立して、水素、または炭素数1~20のアルキル基である。 - 前記重合性抗菌単量体は、下記の化学式で表される化合物のうちの1種以上を含む、請求項5に記載の製造方法:
- 前記重合性抗菌単量体は、前記水溶性エチレン系不飽和単量体100重量部に対して0.01~10重量部使用される、請求項5または6に記載の製造方法。
- 前記架橋重合は、光重合によって行われる、請求項5から7のいずれか一項に記載の製造方法。
- 請求項1から4のいずれか1項に記載の高吸水性樹脂粉末を含む、衛生用品。
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JP2023501130A (ja) | 2023-01-18 |
CN114599696B (zh) | 2023-09-08 |
WO2021096230A1 (ko) | 2021-05-20 |
US20220346379A1 (en) | 2022-11-03 |
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