| 摘要 |
The present invention relates to a super absorbent polymer. The super absorbent polymer according to the present invention includes surface crosslinked polymer particles prepared by surface crosslinking particles of a base resin, wherein the base resin is polymerized from water-soluble ethylene-based unsaturated monomers, and a water-soluble component, in which the water-soluble component is present in an amount of 5% by weight or less based on the total weight of the super absorbent polymer, when measured after free swelling the super absorbent polymer in a 0.9% NaCl solution for 1 hour, and the super absorbent polymer has a permeability of 50 seconds or shorter. According to the present invention, provided is a super absorbent polymer having excellent liquid permeability even when swollen without a reduction in centrifuge retention capacity or absorbency under load while having improved permeability. |
| 主权项 |
1. A super absorbent polymer, comprising:
surface crosslinked polymer particles are prepared by surface crosslinking particles of a base resin, wherein the base resin is polymerized from a monomer composition including water-soluble ethylene-based unsaturated monomers; and a water-soluble component, wherein the water-soluble component is present in an amount of 5% by weight or less based on the total weight of the super absorbent polymer, when measured after free swelling the super absorbent polymer in a 0.9% NaCl solution for 1 hour, and wherein the super absorbent polymer has a permeability calculated by the following Equation 1 of about 50 seconds or shorter:
Permeability (sec)=TS−T0 [Equation 1] wherein TS (sec) is the time required for an amount of a 0.9% saline solution to permeate a saline-absorbed super absorbent polymer under a load of 0.3 psi, wherein the saline-absorbed super absorbent polymer is prepared by swelling 0.2 g of super absorbent polymer powder with the 0.9% saline solution for 30 minutes, and T0 (sec) is the time required for the amount of the 0.9% saline solution to flow under the load of 0.3 psi in the absence of the saline-absorbed super absorbent polymer. |
