SUPER ABSORBENT POLYMER AND METHOD OF PREPARING THE SAME

摘要

Disclosed are a granular super absorbent polymer, including particles (A) having an average diameter of 150 to 850 μm, wherein the particles (A) includes particles (a1) having an average diameter of 500 to 850 μm; and particles (a2) having an average diameter of 150 to 250 μm, and the particles (a1 and a2) have a water-solubility index of 0.08 to 2.0 (represented by Equation 1), thereby it is possible to maintain a proper amount of extractables in a resin, and to exhibit excellent flow conductivity and water absorption ability in a case of being actually applied to products, without inducing any skin problem when, as well as a preparation method thereof.

主权项

1. A granular super absorbent polymer, comprising particles (A) having an average diameter of 150 to 850 μm,
wherein the particles (A) includes a first set of particles having an average diameter of 500 to 850 μm; and a second set of particles having an average diameter of 150 to 250 μm, and the first and second sets of the particles have a water-solubility index of 0.08 to 2.0, which is represented by Equation 1 below:
Water-solubility index=positive square root of [(A1−A2)2/A3]  [Equation 1] wherein A1 is a content ratio of extractables in the first set of particles, A2 is a content ratio of extractables in the second set of particles, and A3 is a content ratio of extractables in A.