KR20200072395A - 고흡수성 수지 및 이의 제조 방법 - Google Patents
고흡수성 수지 및 이의 제조 방법 Download PDFInfo
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- KR20200072395A KR20200072395A KR1020190124302A KR20190124302A KR20200072395A KR 20200072395 A KR20200072395 A KR 20200072395A KR 1020190124302 A KR1020190124302 A KR 1020190124302A KR 20190124302 A KR20190124302 A KR 20190124302A KR 20200072395 A KR20200072395 A KR 20200072395A
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Abstract
Description
| CRC | AUP | GPUP | |
| 단위 | g/g | g/g | ·10E-13m2 |
| 실시예 1 | 35 | 24 | 26 |
| 실시예 2 | 35 | 24 | 24 |
| 실시예 3 | 35 | 24 | 23 |
| 실시예 4 | 35 | 20 | 20 |
| 비교예 1 | 35 | 24 | 15 |
| 비교예 2 | 33 | 22 | 18 |
| 비교예 3 | 35 | 22 | 16 |
| 비교예 4 | 35 | 21 | 17 |
Claims (13)
- 적어도 일부가 중화된 산성기를 갖는 수용성 에틸렌계 불포화 단량체의 제 1 가교 중합체를 포함하는 베이스 수지 분말; 및
상기 베이스 수지 분말 상에 형성되어 있고, 상기 제 1 가교 중합체가 표면 가교제를 매개로 추가 가교된 제 2 가교 중합체를 포함하는 표면 가교층을 포함하는 고흡수성 수지로서,
상기 표면 가교제는 300 이상의 수 평균 분자량을 가지며 복수의 히드록시기 또는 에폭시기를 갖는 고분자형 제 1 표면 가교제를 포함하는 고흡수성 수지.
- 제 1 항에 있어서, 상기 표면 가교제는 300 미만의 분자량을 가지며,
에틸렌 글리콜, 프로필렌 글리콜, 1,3-프로판디올, 1,4-부탄디올, 1,6-헥산디올, 1,2-헥산디올, 1,3-헥산디올, 2-메틸-1,3-프로판디올, 2,5-헥산디올, 2-메틸-1,3-펜탄디올, 2-메틸-2,4-펜탄디올, 트리프로필렌 글리콜 및 글리세롤로 이루어진 군에서 선택된 1 종 이상의 폴리올;
에틸렌 카보네이트 및 프로필렌 카보네이트로 이루어진 군에서 선택된 1 종 이상의 알킬렌 카보네이트계 화합물;
알킬렌글리콜 디글리시딜 에테르의 에폭시 화합물; 옥사졸린 화합물; 옥사졸린 화합물; 또는 환상 우레아 화합물;의 제 2 표면 가교제를 더 포함하는 고흡수성 수지.
- 제 1 항에 있어서, 상기 제 1 표면 가교제는 폴리에틸렌 글리콜계 고분자, 폴리프로필렌 글리콜계 고분자, 폴리올의 폴리글리시딜 에테르계 고분자 및 폴리비닐알코올계 고분자로 이루어진 군에서 선택된 1종 이상을 포함하는 고흡수성 수지.
- 제 1 항에 있어서, 상기 제 1 표면 가교제에서 유래한 가교 구조는 표면 가교층의 최외각 표면에 가장 높은 비율로 존재하며, 표면 가교층의 깊이가 깊을수록 존재 비율이 낮아지는 고흡수성 수지.
- 제 1 항에 있어서, 상기 표면 가교층 상의 다가 금속염을 더 포함하는 고흡수성 수지.
- 제 2 항에 있어서, 상기 제 1 표면 가교제 : 제 2 표면 가교제는 3 : 1 내지 1 : 3의 중량비로 포함되는 고흡수성 수지.
- 제 1 항에 있어서, 상기 고흡수성 수지는 생리 식염수(0.9 중량% 염화 나트륨 수용액)에 대한 30분 동안의 원심분리 보수능(CRC)이 28 내지 43 g/g이고,
EDANA 법 WSP 242.3-10에 따라 측정된 0.7psi의 가압 흡수능(AUP)이 15 내지 27 g/g인 고흡수성 수지.
- 제 1 항에 있어서, 상기 고흡수성 수지를 0.3psi의 가압 하에, 생리 식염수(0.9 중량% 염화 나트륨 수용액)에 1시간 동안 팽윤시킨 후, 상기 생리 식염수를 상기 고흡수성 수지에 흘려 주었을 때 첫 방울이 떨어지는 시점부터 5분 동안 흐르는 유량으로 측정되는 GPUP가 5·10E-13m2 이상인 고흡수성 수지.
- 내부 가교제의 존재 하에, 적어도 일부가 중화된 산성기를 갖는 수용성 에틸렌계 불포화 단량체를 가교 중합하여 제 1 가교 중합체를 포함하는 함수겔 중합체를 형성하는 단계;
상기 함수겔 중합체를 건조, 분쇄 및 분급하여 베이스 수지 분말을 형성하는 단계; 및
표면 가교제의 존재 하에, 상기 베이스 수지 분말을 열처리하여 표면 가교하는 단계를 포함하고,
상기 표면 가교제는 300 이상의 수 평균 분자량을 가지며 복수의 히드록시기 또는 에폭시기를 갖는 고분자형 제 1 표면 가교제를 포함하는 고흡수성 수지의 제조 방법.
- 제 9 항에 있어서, 상기 표면 가교제는 300 미만의 분자량을 가지며,
에틸렌 글리콜, 프로필렌 글리콜, 1,3-프로판디올, 1,4-부탄디올, 1,6-헥산디올, 1,2-헥산디올, 1,3-헥산디올, 2-메틸-1,3-프로판디올, 2,5-헥산디올, 2-메틸-1,3-펜탄디올, 2-메틸-2,4-펜탄디올, 트리프로필렌 글리콜 및 글리세롤로 이루어진 군에서 선택된 1 종 이상의 폴리올;
에틸렌 카보네이트 및 프로필렌 카보네이트로 이루어진 군에서 선택된 1 종 이상의 알킬렌 카보네이트계 화합물;
알킬렌글리콜 디글리시딜 에테르의 에폭시 화합물; 옥사졸린 화합물; 옥사졸린 화합물; 또는 환상 우레아 화합물;의 제 2 표면 가교제를 더 포함하는 고흡수성 수지의 제조 방법.
- 제 9 항에 있어서, 상기 베이스 수지 분말은 150 내지 850㎛의 입경을 가지며, 300 내지 600㎛의 입경을 갖는 입자를 50 중량% 이상 포함하도록 분쇄 및 분급되는 고흡수성 수지의 제조 방법.
- 제 10 항에 있어서, 상기 제 1 및 제 2 표면 가교제는 각각 베이스 수지 분말 100 중량부에 대해, 0.1 내지 2.0 중량부의 함량으로 사용되는 고흡수성 수지의 제조 방법.
- 제 9 항에 있어서, 상기 표면 가교 단계는 140℃ 내지 250℃의 반응 온도에서 30분 이상 열처리 및 반응시켜 진행하는 고흡수성 수지의 제조 방법.
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