SUPER ABSORBENT POLYMER

• Main Authors: RYU, CHUL HEE, LEE, HYE MIN
• Format: Patent
• Language: English; Korean
• Published: 01.02.2018
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; BANDAGES, DRESSINGS OR ABSORBENT PADS; CHEMISTRY; COMPOSITIONS BASED THEREON; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; GENERAL PROCESSES OF COMPOUNDING; HUMAN NECESSITIES; HYGIENE; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MEDICAL OR VETERINARY SCIENCE; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PROSTHESES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OR PROTECTION OF EYES OR EARS; WORKING-UP

The present invention relates to a superabsorbent resin. According to the present invention, the superabsorbent resin comprises: surface-crosslinked polymer particles prepared by surface-crosslinking a base resin, wherein the base resin is prepared by polymerizing a water soluble ethylene-based unsaturated monomer; and water soluble components. When measured after allowing the superabsorbent resin to freely swell in a 0.9% NaCl solution for one hour, the water soluble components constitute 5 wt% or less of the total weight of the superabsorbent resin, and have permeability of 50 seconds or less. According to the present invention, the superabsorbent resin has improved permeability without degrading water retention ability or absorbency under pressure, and maintains excellent ability to pass liquids when swelling. 본 발명은 고흡수성 수지에 관한 것이다. 본 발명에 따른 고흡수성 수지는 수용성 에틸렌계 불포화 단량체를 중합시킨 베이스 수지를 표면 가교시킨 표면 가교 중합체 입자, 및 수가용 성분을 포함하는 고흡수성 수지로, 상기 고흡수성 수지를 0.9% NaCl 용액으로 1 시간 동안 자유 팽윤(free swelling)시킨 후 측정하였을 때, 상기 수가용 성분이 고흡수성 수지의 전체 중량에 대하여 5 중량% 이하로 존재하고, 투과율이 50초 이하이다. 본 발명에 따르면, 향상된 투과율을 가지면서도 보수능 또는 가압 흡수능의 저하가 없고 팽윤시에도 통액성이 우수한 고흡수성 수지를 제공할 수 있다.