JP2021511411A - 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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- JP2021511411A JP2021511411A JP2020539707A JP2020539707A JP2021511411A JP 2021511411 A JP2021511411 A JP 2021511411A JP 2020539707 A JP2020539707 A JP 2020539707A JP 2020539707 A JP2020539707 A JP 2020539707A JP 2021511411 A JP2021511411 A JP 2021511411A
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- Prior art keywords
- absorbent resin
- highly water
- polymer
- water
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Abstract
Description
本出願は、2018年12月11日付韓国特許出願第10−2018−0158919号および2019年11月4日付韓国特許出願第10−2019−0139625号に基づいた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。
a)水溶性エチレン系不飽和単量体、内部架橋剤、および重合開始剤を混合してモノマー組成物を製造する段階;
b)前記モノマー組成物を重合して含水ゲル状重合体を製造する段階;
c)前記含水ゲル状重合体を細かくする段階;
d)前記細かくした含水ゲル状重合体にフラッフパルプおよび合成高分子繊維のうち1種以上の繊維を添加して混合して混合物を製造する段階;
e)前記混合物を細かくする段階;
f)前記混合物を乾燥する段階;および
g)前記混合物を粉砕する段階を含む高吸水性樹脂の製造方法を提供する。
h)前記g)段階で得られた混合物に表面架橋剤を添加する段階;および
i)表面架橋反応を行う段階をさらに含み得る。
前記ベース樹脂粒子の表面に形成されており、前記架橋重合体が表面架橋剤を媒介に追加架橋された表面架橋層を含む高吸水性樹脂として、
前記繊維の少なくとも一部は、前記ベース樹脂粒子の内部を貫いて混入されている高吸水性樹脂を提供する。
高吸水性樹脂粒子;および
フラッフパルプおよび合成高分子繊維のうち1種以上の繊維を含み、
前記繊維の少なくとも一部は、前記高吸水性樹脂粒子の内部を貫いて混入されている、高吸水性樹脂組成物が提供される。
a)水溶性エチレン系不飽和単量体、内部架橋剤、および重合開始剤を混合してモノマー組成物を製造する段階;
b)前記モノマー組成物を重合して含水ゲル状重合体を製造する段階;
c)前記含水ゲル状重合体を細かくする段階;
d)前記細かくした含水ゲル状重合体にフラッフパルプおよび合成高分子繊維のうち1種以上の繊維を添加して混合して混合物を製造する段階;
e)前記混合物を細かくする段階;
f)前記混合物を乾燥する段階;および
g)前記混合物を粉砕する段階を含む。
高吸水性樹脂の製造
実施例1〜10
アクリル酸100g、架橋剤としてポリエチレングリコールジアクリレート(PEGDA,Mw=523)3.0g、光開始剤としてフェニルビス(2,4,6−トリメチルベンゾイル)ホスフィンオキシド(Phenylbis(2,4,6−trimethylbenzoyl)phosphine oxide)0.008g、熱開始剤として過硫酸ナトリウム(sodium persulfate;SPS)0.08g、31.5%苛性ソーダ(NaOH)128g、水63.5gを混合してモノマー水溶液組成物を製造した。
含水ゲル状重合体を細かくする過程で繊維を添加しなかったことを除いては実施例1と同様の方法で高吸水性樹脂を製造した。
比較例1の高吸水性樹脂100重量部に、実施例1で使用したフラッフパルプ5重量部を添加して混合し、高吸水性樹脂とフラッフパルプが単に混合された高吸水性樹脂複合体を製造した。
前記各実施例および比較例の高吸水性樹脂に対して下記方法で物性を測定し、その結果を表1に示した。
各樹脂の無荷重下吸収倍率による保持能をEDANA WSP 241.3に従い測定した。
CRC(g/g)={[W2(g)−W1(g)]/W0(g)}−1
各樹脂の0.3psiの加圧吸収能を、EDANA法WSP 242.3に従い測定した。加圧吸収能の測定時には、前記CRC測定時の樹脂分級分を使用した。
AUP(g/g)=[W5(g)−W4(g)]/W3(g)
各樹脂の吸収速度は、国際公開第1987/003208号に記載された方法に準じて秒単位で測定された。
Claims (16)
- a)水溶性エチレン系不飽和単量体、内部架橋剤、および重合開始剤を混合してモノマー組成物を製造する段階;
b)前記モノマー組成物を重合して含水ゲル状重合体を製造する段階;
c)前記含水ゲル状重合体を細かくする段階;
d)前記細かくした含水ゲル状重合体にフラッフパルプおよび合成高分子繊維のうち1種以上の繊維を添加して混合して混合物を製造する段階;
e)前記混合物を細かくする段階;
f)前記混合物を乾燥する段階;および
g)前記混合物を粉砕する段階を含む、高吸水性樹脂の製造方法。 - 前記繊維は、含水ゲル状重合体100重量部に対して1〜18重量部で含まれる、請求項1に記載の高吸水性樹脂の製造方法。
- 前記繊維の長さは、1〜20mmである、請求項1または2に記載の高吸水性樹脂の製造方法。
- 前記繊維の幅は、1〜100μmである、請求項1から3のいずれか一項に記載の高吸水性樹脂の製造方法。
- 前記c)ないしe)段階のうち1以上の段階で水をさらに添加する、請求項1から4のいずれか一項に記載の高吸水性樹脂の製造方法。
- 前記水は、含水ゲル状重合体100重量部に対して1〜20重量部で添加される、請求項5に記載の高吸水性樹脂の製造方法。
- 前記モノマー組成物は、発泡剤をさらに含む、請求項1から6のいずれか一項に記載の高吸水性樹脂の製造方法。
- 前記モノマー組成物は、アルキルスルファート塩(alkyl sulfate salt)、アルキルスルホネート塩(alkyl sulfonate salt)、アルキルホスフェート塩(alkyl phosphate salt)、アルキルカーボネート塩(alkyl carbonate salt)、ポリエチレングリコールアルキルエステル(polyethylene glycol alkyl ester)、ポリプロピレングリコールアルキルエステル(polypropylene glycol alkyl ester)、グルコシドアルキルエステル(glucoside alkyl ester)、グリセロールアルキルエステル(glycerol alkyl ester)、およびポリエチレングリコールとポリプロピレングリコールのブロック−共重合体(block−copolymers of polyethylene glycol and polypropylene glycol)からなる群より選ばれる1種以上の発泡安定剤をさらに含む、請求項7に記載の高吸水性樹脂の製造方法。
- 前記g)段階以後、
h)前記g)段階で得られた混合物に表面架橋剤を添加する段階;および
i)表面架橋反応を行う段階をさらに含む、請求項1から8のいずれか一項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生成物;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からなる群より選ばれる1種以上である、請求項9に記載の高吸水性樹脂の製造方法。
- 前記表面架橋剤は、前記混合物100重量部に対して0.001〜5重量部で添加される、請求項9または10に記載の高吸水性樹脂の製造方法。
- 請求項1から11のいずれか一項に記載の製造方法によって製造される、高吸水性樹脂。
- 水溶性エチレン系不飽和単量体が内部架橋剤の存在下に架橋重合された架橋重合体、ならびにフラッフパルプおよび合成高分子繊維のうち1種以上の繊維を含むベース樹脂粒子;および
前記ベース樹脂粒子の表面に形成されており、前記架橋重合体が表面架橋剤を媒介に追加架橋された表面架橋層を含む高吸水性樹脂であって、
前記繊維の少なくとも一部は、前記ベース樹脂粒子の内部を貫いて混入されている、高吸水性樹脂。 - EDANA法WSP 241.3に従い測定した遠心分離保持能(CRC)が25〜45g/gである、請求項13に記載の高吸水性樹脂。
- EDANA法WSP 242.3に従い測定した0.3psiの加圧吸収能(AUL)が25〜40g/gである、請求項13または14に記載の高吸水性樹脂。
- 高吸水性樹脂粒子;および
フラッフパルプおよび合成高分子繊維のうち1種以上の繊維を含み、
前記繊維の少なくとも一部は、前記高吸水性樹脂粒子の内部を貫いて混入されている、高吸水性樹脂組成物。
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