JP7418902B2 - 生分解性高吸水性樹脂およびその製造方法 - Google Patents
生分解性高吸水性樹脂およびその製造方法 Download PDFInfo
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- JP7418902B2 JP7418902B2 JP2022542442A JP2022542442A JP7418902B2 JP 7418902 B2 JP7418902 B2 JP 7418902B2 JP 2022542442 A JP2022542442 A JP 2022542442A JP 2022542442 A JP2022542442 A JP 2022542442A JP 7418902 B2 JP7418902 B2 JP 7418902B2
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- Prior art keywords
- maleic acid
- polysaccharide
- acid group
- modified
- substitution
- Prior art date
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- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 15
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- VFHVQBAGLAREND-UHFFFAOYSA-N diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 VFHVQBAGLAREND-UHFFFAOYSA-N 0.000 description 1
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- 235000013305 food Nutrition 0.000 description 1
- 238000010413 gardening Methods 0.000 description 1
- 229960002442 glucosamine Drugs 0.000 description 1
- CATSNJVOTSVZJV-UHFFFAOYSA-N heptan-2-one Chemical compound CCCCCC(C)=O CATSNJVOTSVZJV-UHFFFAOYSA-N 0.000 description 1
- ACCCMOQWYVYDOT-UHFFFAOYSA-N hexane-1,1-diol Chemical compound CCCCCC(O)O ACCCMOQWYVYDOT-UHFFFAOYSA-N 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- TYQCGQRIZGCHNB-JLAZNSOCSA-N l-ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(O)=C(O)C1=O TYQCGQRIZGCHNB-JLAZNSOCSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 150000002734 metacrylic acid derivatives Chemical class 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229950006780 n-acetylglucosamine Drugs 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- FAQJJMHZNSSFSM-UHFFFAOYSA-N phenylglyoxylic acid Chemical compound OC(=O)C(=O)C1=CC=CC=C1 FAQJJMHZNSSFSM-UHFFFAOYSA-N 0.000 description 1
- 229910000073 phosphorus hydride Inorganic materials 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 108010064470 polyaspartate Proteins 0.000 description 1
- 229920002643 polyglutamic acid Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 229940116317 potato starch Drugs 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- 239000011802 pulverized particle Substances 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 229940100486 rice starch Drugs 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- UWHCKJMYHZGTIT-UHFFFAOYSA-N tetraethylene glycol Chemical compound OCCOCCOCCOCCO UWHCKJMYHZGTIT-UHFFFAOYSA-N 0.000 description 1
- 125000005259 triarylamine group Chemical group 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
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- 230000004580 weight loss Effects 0.000 description 1
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- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
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Description
マレイン酸基(-OCOCH=CHCOOH)およびスルホコハク酸基(-OCOCH(SO3H)CH2COOH)を有する変性ポリサッカライド(polysaccharide)を含む単量体および内部架橋剤の架橋重合体を含み、
前記マレイン酸基およびスルホコハク酸基の少なくとも一部は中和されており、
前記変性ポリサッカライド内マレイン酸基置換度は0.15~0.65であり、
前記変性ポリサッカライド内スルホコハク酸基置換度は0.05~0.60である、
生分解性高吸水性樹脂が提供される。
前記単量体組成物を架橋重合して含水ゲル重合体を製造する段階;および
前記含水ゲル重合体を乾燥、粉砕および分級する段階を含む、
生分解性高吸水性樹脂の製造方法において、
前記変性ポリサッカライドのマレイン酸基およびスルホコハク酸基の少なくとも一部は中和されており、
前記変性ポリサッカライド内マレイン酸基置換度は0.15~0.65であり、
前記変性ポリサッカライド内スルホコハク酸基置換度は0.05~0.60である、
生分解性高吸水性樹脂の製造方法が提供される。
具体的に、発明の一実施形態による生分解性高吸水性樹脂はマレイン酸基(-OCOCH=CHCOOH)およびスルホコハク酸基(-OCOCH(SO3H)CH2COOH)を有する変性ポリサッカライド(polysaccharide)を含む単量体および内部架橋剤の架橋重合体を含む。
Mは、それぞれ独立して、水素またはアルカリ金属である。
R-COOM'
Rは、不飽和結合を含む炭素数2~5のアルキル基であり、
M'は、水素原子、1価または2価金属、アンモニウム基または有機アミン塩である。
一方、前記生分解性高吸水性樹脂は、下記製造方法で製造することができる:
内部架橋剤および重合開始剤の存在下で、マレイン酸基(-OCOCH=CHCOOH)およびスルホコハク酸基(-OCOCH(SO3H)CH2COOH)を有する変性ポリサッカライド(polysaccharide)を含む単量体組成物を製造する段階;
前記単量体組成物を架橋重合して含水ゲル重合体を製造する段階;および
前記含水ゲル重合体を乾燥、粉砕および分級する段階を含む、
生分解性高吸水性樹脂の製造方法において、
前記変性ポリサッカライドのマレイン酸基およびスルホコハク酸基の少なくとも一部は中和されており、
前記変性ポリサッカライド内マレイン酸基置換度は0.15~0.65であり、
前記変性ポリサッカライド内スルホコハク酸基置換度は0.05~0.60である、
生分解性高吸水性樹脂の製造方法。
非変性ポリサッカライドを酸処理する第1段階;
前記第1段階で製造された酸処理されたポリサッカライドをマレイン酸(maleic acid)、またはマレイン酸無水物(Maleic acid anhydride)と反応させる第2段階;および
前記第2段階で製造されたポリサッカライドをサルファイト系化合物と反応させる第3段階を含んで製造することができる。
(1)段階1:キトサンのマレイン酸化段階
キトサン20gとマレイン酸無水物(Maleic Anhydride)100gを250mlの三口フラスコに投入した後、90℃で6時間攪拌した。反応後、混合物をアセトン溶媒に沈殿およびろ過して過量投入されたマレイン酸無水物(Maleic Anhydride)を除去し、50℃で24時間以上乾燥した後、マレイン酸化されたキトサンを得た。
マレイン酸化されたキトサン20gと亜硫酸水素ナトリウム(sodium bisulfite)5gを250mlの三口フラスコに投入した後、40℃で6時間攪拌した。攪拌後、反応物をNa2CO3を添加してpH6~7に調整した後、水とエタノールで数回洗浄後、50℃で24時間以上乾燥して最終マレイン酸基(-OCOCH=CHCOOH)およびスルホコハク酸基(-OCOCH(SO3H)CH2COOH)基が導入された変性キトサン(M/S)を製造した。
(1)段階1:非変性デンプンの酸処理段階
デンプン20gを2M HCl溶液200mlに投入した後、35℃で24時間攪拌した。その後、フィルターして水とエタノールで数回洗浄後、50℃で24時間以上乾燥して酸処理されたデンプンを得た。
酸処理されたデンプン20gとマレイン酸無水物(Maleic Anhydride)100gを250mlの三口フラスコに投入した後、90℃で6時間攪拌した。反応後、混合物をアセトン溶媒に沈殿およびろ過して過量投入されたマレイン酸無水物(Maleic Anhydride)を除去し、50℃で24時間以上乾燥した後、マレイン酸化された変性デンプンを得た。
マレイン酸化された変性デンプン20gと亜硫酸水素ナトリウム(sodium bisulfite)5gを250mlの三口フラスコに投入した後、40℃で6時間攪拌した。攪拌後、反応物をNa2CO3を添加してpH6~7に調整した後、水とエタノールで数回洗浄後、50℃で24時間以上乾燥して最終マレイン酸基(-OCOCH=CHCOOH)およびスルホコハク酸基(-OCOCH(SO3H)CH2COOH)基が導入された変性デンプン1(M/S-1)を製造した。
前記製造例2で亜硫酸水素ナトリウムを10g使用したことを除いては、製造例2と同様な方法を使用して変性デンプン2(M/S-2)を製造した。
前記製造例2で亜硫酸水素ナトリウムを14g使用したことを除いては、製造例2と同様な方法を使用して変性デンプン3(M/S-3)を製造した。
前記製造例2で亜硫酸水素ナトリウムを20g使用したことを除いては、製造例2と同様な方法を使用して変性デンプン4(M/S-4)を製造した。
(1)段階1:非変性デンプンの酸処理段階
デンプン20gを2M HCl溶液200mlに投入した後、35℃で24時間攪拌した。その後、フィルターして水とエタノールで数回洗浄後、50℃で24時間以上乾燥して酸処理されたデンプンを得た。
酸処理されたデンプン20gとマレイン酸無水物(Maleic Anhydride)100gを250mlの三口フラスコに投入した後、90℃で6時間攪拌した。反応後、混合物をアセトン溶媒に沈殿およびろ過して過量投入されたマレイン酸無水物(Maleic Anhydride)を除去し、50℃で24時間以上乾燥した後、マレイン酸化された変性デンプン(M)を得た。
前記製造例2で亜硫酸水素ナトリウムを30g使用したことを除いては、製造例2と同様な方法を使用して変性デンプン(M/S’)を製造した。
攪拌機、窒素投入器、温度計を装着した3Lガラス容器に、前記製造例1で製造した変性キトサン(M/S)100g、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)0.23g、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0.008g、熱開始剤として過硫酸ナトリウム(SPS)0.12g、98%水酸化ナトリウム溶液39.7gおよび水200gを添加して窒素を連続的に投入しながら単量体組成物を製造した。
変性キトサン(M/S)の代わりに下記表1の変性デンプンを使用したことを除いては、実施例1と同様な方法を使用して高吸水性樹脂を製造した。
変性キトサン(M/S)の代わりに下記表1の変性デンプンを使用したことを除いては、実施例1と同様な方法を使用して高吸水性樹脂を製造した。
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、次のような方法で物性を評価し、その結果を下記表1に示した。
各樹脂の無荷重下吸収倍率による保水能をEDANA WSP 241.3によって測定した。
CRC(g/g)={[W2(g)-W1(g)]/W0(g)}-1
各樹脂の0.7psiの加圧吸水能を、EDANA法 WSP 242.3によって測定した。
AUP(g/g)=[W4(g)-W3(g)]/W0(g)
KS M ISO 14855-1規格に基づいて測定した。
Claims (10)
- マレイン酸基(-OCOCH=CHCOOH)およびスルホコハク酸基(-OCOCH(SO3H)CH2COOH)を有する変性ポリサッカライド(polysaccharide)を含む単量体および内部架橋剤の架橋重合体を含み、
前記マレイン酸基およびスルホコハク酸基の少なくとも一部は中和されており、
前記変性ポリサッカライド内マレイン酸基置換度は0.15~0.65であり、
前記変性ポリサッカライド内スルホコハク酸基置換度は0.05~0.60であり、
前記単量体は、少なくとも一部が中和された酸性基を有するアクリル酸系化合物を含む、
生分解性高吸水性樹脂。 - 前記変性ポリサッカライドは、変性デンプン(modified starch)または変性キトサン(modified chitosan)である、請求項1に記載の生分解性高吸水性樹脂。
- 前記マレイン酸基は、マレイン酸(maleic acid)、またはマレイン酸無水物(Maleic acid anhydride)によって導入されたものである、請求項1または2に記載の生分解性高吸水性樹脂。
- 前記マレイン酸基の置換度と前記スルホコハク酸基の置換度の合計は1以下である、請求項1から3のいずれか一項に記載の生分解性高吸水性樹脂。
- 前記マレイン酸基の置換度およびスルホコハク酸基の置換度の比は1:0.1~1:3.0である、請求項1から4のいずれか一項に記載の生分解性高吸水性樹脂。
- 前記変性ポリサッカライドは、下記化学式1-1~1-3で表される繰り返し単位のうちの1種以上;および下記化学式2-1~2-3で表される繰り返し単位のうちの1種以上を含む、請求項1から5のいずれか一項に記載の生分解性高吸水性樹脂:
Mは、それぞれ独立して、水素またはアルカリ金属である。 - 内部架橋剤および重合開始剤の存在下で、マレイン酸基(-OCOCH=CHCOOH)およびスルホコハク酸基(-OCOCH(SO3H)CH2COOH)を有する変性ポリサッカライド(polysaccharide)を含む単量体組成物を製造する段階;
前記単量体組成物を架橋重合して含水ゲル重合体を製造する段階;および
前記含水ゲル重合体を乾燥、粉砕および分級する段階を含む、
生分解性高吸水性樹脂の製造方法において、
前記変性ポリサッカライドのマレイン酸基およびスルホコハク酸基の少なくとも一部は中和されており、
前記変性ポリサッカライド内マレイン酸基置換度は0.15~0.65であり、
前記変性ポリサッカライド内スルホコハク酸基置換度は0.05~0.60であり、
前記単量体組成物は、少なくとも一部が中和された酸性基を有するアクリル酸系化合物を含む、
生分解性高吸水性樹脂の製造方法。 - 前記変性ポリサッカライドは、
非変性ポリサッカライドを酸処理する第1段階;
前記第1段階で製造された酸処理されたポリサッカライドをマレイン酸(maleic acid)、またはマレイン酸無水物(Maleic acid anhydride)と反応させる第2段階;および
前記第2段階で製造されたポリサッカライドをサルファイト系化合物と反応させる第3段階を含んで製造される、請求項7に記載の生分解性高吸水性樹脂の製造方法。 - 前記第3段階で、
前記サルファイト系化合物は、前記ポリサッカライドに導入されたビニル基と反応する、請求項8に記載の生分解性高吸水性樹脂の製造方法。 - 請求項1から6のいずれか一項に記載の生分解性高吸水性樹脂を含む衛生用品。
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