KR102566286B1 - 고흡수성 수지 및 이의 제조 방법 - Google Patents
고흡수성 수지 및 이의 제조 방법 Download PDFInfo
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Abstract
Description
| 실시예 1 | 실시예 2 | 실시예 3 | 실시예 4 | 실시예 5 | 비교예1 | 비교예2 | |
| CRC (g/g) | 32.7 | 30.8 | 32.7 | 30.6 | 32.3 | 33.2 | 33.2 |
| Vortex time (초) | 34 | 29 | 28 | 25 | 25 | 35 | 38 |
| 0.7psi AUP (g/g) | 23.9 | 23.2 | 23 | 22 | 21 | 19.1 | 20.9 |
| Permeability (초) | 14 | 14 | 15 | 15 | 13 | 24 | 13 |
| 무가압 수도수 장기 재습윤 (g) | 2.8 | 2.8 | 2 | 2 | 1.7 | 5.5 | 3.5 |
| 무가압 수도수 단기 재습윤 (g) | 0.7 | 0.75 | 0.6 | 0.65 | 0.5 | 1.5 | 1.3 |
| 가압 수도수 장기 재습윤 (g) | 0.7 | 0.8 | 0.4 | 0.5 | 0.4 | 2 | 1.5 |
Claims (20)
- 수분산 실리카의 존재 하에, 산성기를 가지며 상기 산성기의 적어도 일부가 중화된 아크릴산계 단량체 및 내부 가교제가 가교 중합된 베이스 수지(base resin)를 준비하는 단계(단계 1);
상기 베이스 수지에, HLB가 0 이상 6 이하인 소수성 물질, 및 표면 가교제를 혼합하는 단계(단계 2); 및
상기 단계 2의 혼합물을 승온하여 상기 베이스 수지에 대한 표면 개질을 수행하는 단계(단계 3);
를 포함하고,
소수성 물질은 상기 베이스 수지 100 중량부에 대하여 0.02 내지 0.5 중량부로 혼합하는,
고흡수성 수지의 제조방법.
- 제1항에 있어서,
상기 수분산 실리카는 입경이 10 내지 100nm인, 고흡수성 수지의 제조방법.
- 제1항에 있어서,
상기 수분산 실리카는 상기 아크릴산계 단량체 100 중량부에 대하여 0.01 내지 1.0 중량부로 포함되는, 고흡수성 수지의 제조방법.
- 제1항에 있어서,
상기 소수성 물질은 용융 온도(melting point)가 상기 단계 3의 승온 온도 이하인, 고흡수성 수지의 제조방법.
- 제1항에 있어서,
상기 소수성 물질은 글리세릴 스테아레이트(glyceryl stearate), 글리콜 스테아레이트(glycol stearate), 마그네슘 스테아레이트(magnesium stearate), 글리세릴 라우레이트(glyceryl laurate), 소르비탄 스테아레이트(sorbitan stearate), 소르비탄 트리올리에이트(sorbitan trioleate), 및 PEG-4 디라우레이트(PEG-4 dilaurate)로 이루어진 군으로부터 선택되는 1종 이상을 포함하는, 고흡수성 수지의 제조방법.
- 제5항에 있어서,
상기 소수성 물질은 글리세릴 스테아레이트(glyceryl stearate)인, 고흡수성 수지의 제조방법.
- 삭제
- 제1항에 있어서,
상기 단계 2에서, 상기 소수성 물질을 먼저 상기 베이스 수지에 건식으로 혼합하고, 이어서 상기 표면 가교제를 포함하는 표면 가교 용액을 혼합하는, 고흡수성 수지의 제조방법.
- 제1항에 있어서,
상기 단계 3은 80 내지 190℃의 온도에서 수행하는, 고흡수성 수지의 제조방법.
- 제1항에 있어서,
상기 단계 1은,
산성기를 가지며 상기 산성기의 적어도 일부가 중화된 아크릴산계 단량체, 내부 가교제, 수분산 실리카, 및 중합 개시제를 포함하는 모노머 조성물을 중합하여 함수겔상 중합체를 형성하는 단계;
상기 함수겔상 중합체를 건조하는 단계;
상기 건조된 중합체를 분쇄하는 단계; 및
상기 분쇄된 중합체를 분급하는 단계를 포함하는, 고흡수성 수지의 제조 방법.
- 제10항에 있어서,
상기 모노머 조성물은 발포제 및 기포 안정제를 더 포함하는, 고흡수성 수지의 제조방법.
- 제11항에 있어서,
상기 발포제는 소디움 비카보네이트(sodium bicarbonate), 소디움 카보네이트(sodium carbonate), 포타슘 비카보네이트(potassium bicarbonate), 포타슘 카보네이트(potassium carbonate), 칼슘 비카보네이트(calcium bicarbonate), 칼슘 카보네이트(calcium bicarbonate), 마그네슘 비카보네이트(magnesiumbicarbonate) 및 마그네슘 카보네이트(magnesium carbonate)로 이루어진 군으로부터 선택되는 1종 이상을 포함하는, 고흡수성 수지의 제조방법.
- 제11항에 있어서,
상기 기포 안정제는 소듐 도데실 설페이트(sodium dodecyl sulfate), 소듐 스테아레이트(sodium stearate), 암모늄 라우릴 설페이트 (ammonium lauryl sulfate), 소디움 라우릴 에테르 설페이트 (sodium lauryl ether sulfate; SLES), 및 소디움 미레스 설페이트(sodium myreth sulfate)로 이루어진 군으로부터 선택되는 1종 이상을 포함하는, 고흡수성 수지의 제조방법.
- 제1항에 있어서,
상기 고흡수성 수지는, 23℃ 내지 24℃의 50 mL의 생리 식염수에 2g의 고흡수성 수지를 넣고, 마그네틱 바(직경 8 mm, 길이 30 mm)를 600 rpm으로 교반하여 와류(vortex)가 사라질 때까지의 시간을 초 단위로 측정한 흡수 속도(vortex time)가 35초 이하인, 고흡수성 수지의 제조 방법.
- 제1항에 있어서,
상기 고흡수성 수지는 하기 식 1에 따라 측정되는 통액성(permeability, 단위: 초)이 20초 이하인, 고흡수성 수지의 제조 방법:
[식 1]
통액성(sec) = T1 - B
상기 식 1에서,
T1은 내경 20mm이며, 하단에 glass 필터가 장착된 크로마토그래피 관 내에 분급(30# ~ 50#)된 고흡수성 수지 시료 0.2±0.0005g을 넣고 0.9% 염수를 가하여 염수 부피가 50 ml가 되게 한 후, 30분 간 방치 후, 액면높이가 40 ml에서 20 ml까지 줄어드는 데에 걸리는 시간이고, B는 염수가 채워진 크로마토그래피 관에서 액면높이가 40 ml에서 20 ml까지 줄어드는 데에 걸리는 시간이다.
- 산성기의 적어도 일부가 중화된 아크릴산계 단량체가 수분산 실리카의 존재 하에 가교 중합된 가교 중합체를 포함하는 베이스 수지; 및
상기 베이스 수지의 입자 표면에 형성되어 있고, 상기 가교 중합체가 표면 가교제를 매개로 추가 가교되어 있는 표면 개질층을 포함하고,
상기 표면 개질층은 HLB가 0 이상 6 이하인 소수성 물질을 포함하며,
23℃ 내지 24℃의 50 mL의 생리 식염수에 2g의 고흡수성 수지를 넣고, 마그네틱 바(직경 8 mm, 길이 30 mm)를 600 rpm으로 교반하여 와류(vortex)가 사라질 때까지의 시간을 초 단위로 측정한 흡수 속도(vortex time)가 35초 이하이고,
상기 소수성 물질은 상기 베이스 수지 100 중량부에 대하여 0.02 내지 0.5 중량부로 포함되는,
고흡수성 수지.
- 삭제
- 제16항에 있어서,
상기 고흡수성 수지는 하기 식 1에 따라 측정되는 통액성(permeability, 단위: 초)이 20초 이하인, 고흡수성 수지:
[식 1]
통액성(sec) = T1 - B
상기 식 1에서,
T1은 내경 20mm이며, 하단에 glass 필터가 장착된 크로마토그래피 관 내에 분급(30# ~ 50#)된 고흡수성 수지 시료 0.2±0.0005g을 넣고 0.9% 염수를 가하여 염수 부피가 50 ml가 되게 한 후, 30분 간 방치 후, 액면높이가 40 ml에서 20 ml까지 줄어드는 데에 걸리는 시간이고, B는 염수가 채워진 크로마토그래피 관에서 액면높이가 40 ml에서 20 ml까지 줄어드는 데에 걸리는 시간이다.
- 제16항에 있어서,
상기 고흡수성 수지는, 상기 고흡수성 수지 1g을 수도수 100g에 침지시켜 10분 동안 팽윤시킨 후, 팽윤된 상기 고흡수성 수지를 수도수에 침지시킨 최초 시점으로부터 3시간 동안 여과지 상에서 방치하고 나서, 상기 고흡수성 수지로부터 상기 여과지로 다시 베어나온 물의 중량으로 정의되는 재습윤 특성(무가압 수도수 장기 재습윤)이 3.0g 이하인, 고흡수성 수지.
- 제16항에 있어서,
상기 고흡수성 수지는, 상기 고흡수성 수지 1g을 수도수 100g에 침지시켜 10분 동안 팽윤시킨 후, 팽윤된 상기 고흡수성 수지를 수도수에 침지시킨 최초 시점으로부터 1시간 동안 여과지 상에서 방치하고 나서, 상기 고흡수성 수지로부터 상기 여과지로 다시 베어나온 물의 중량으로 정의되는 재습윤 특성(무가압 수도수 단기 재습윤)이 1.0g 이하인, 고흡수성 수지.
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| EP18887781.5A EP3708606A4 (en) | 2017-12-11 | 2018-12-07 | SUPER ABSORBENT POLYMER AND MANUFACTURING PROCESS FOR IT |
| US16/771,479 US11633719B2 (en) | 2017-12-11 | 2018-12-07 | Superabsorbent polymer composition and method for preparing the same |
| JP2020530506A JP7038825B2 (ja) | 2017-12-11 | 2018-12-07 | 高吸水性樹脂およびその製造方法 |
| CN201880078532.3A CN111433261B (zh) | 2017-12-11 | 2018-12-07 | 超吸收性聚合物组合物及其制备方法 |
| PCT/KR2018/015468 WO2019117541A1 (ko) | 2017-12-11 | 2018-12-07 | 고흡수성 수지 및 이의 제조 방법 |
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| WO2021054609A1 (ko) * | 2019-09-18 | 2021-03-25 | 주식회사 엘지화학 | 고흡수성 수지의 제조 방법 |
| KR102608042B1 (ko) | 2019-09-18 | 2023-11-30 | 주식회사 엘지화학 | 고흡수성 수지의 제조 방법 |
| WO2022131838A1 (ko) * | 2020-12-18 | 2022-06-23 | 주식회사 엘지화학 | 고흡수성 수지 및 이의 제조 방법 |
| KR102887906B1 (ko) * | 2020-12-18 | 2025-11-18 | 주식회사 엘지화학 | 고흡수성 수지 및 이의 제조 방법 |
| KR102869971B1 (ko) * | 2020-12-18 | 2025-10-17 | 주식회사 엘지화학 | 고흡수성 수지 및 이의 제조 방법 |
| US20230347317A1 (en) * | 2020-12-18 | 2023-11-02 | Lg Chem, Ltd. | Method for Preparing Super Absorbent Polymer |
| US12516160B2 (en) | 2020-12-18 | 2026-01-06 | Lg Chem, Ltd. | Method for preparing super absorbent polymer |
| EP4186945A4 (en) * | 2020-12-18 | 2024-02-14 | Lg Chem, Ltd. | Super absorbent polymer, and preparation method thereof |
| KR102862393B1 (ko) * | 2020-12-18 | 2025-09-19 | 주식회사 엘지화학 | 고흡수성 수지의 제조 방법 |
| CN115413287A (zh) | 2021-01-14 | 2022-11-29 | 株式会社Lg化学 | 制备超吸收性聚合物的方法 |
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| US20240400770A1 (en) * | 2021-10-29 | 2024-12-05 | Lg Chem, Ltd. | Super Absorbent Polymer Composition and Preparation Method Thereof |
| EP4273188A4 (en) * | 2021-11-24 | 2024-08-28 | Lg Chem, Ltd. | Method for preparing super absorbent polymer |
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| EP3708606A1 (en) | 2020-09-16 |
| CN111433261A (zh) | 2020-07-17 |
| EP3708606A4 (en) | 2021-01-13 |
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