Super absorbent resin and preparation method thereof

Abstract

The present invention relates to a sodium polyacrylate super absorbent resin for blood absorption with a gradual hierarchical structure. When a blood simulant solution is used as the detection medium, according to ISO 19699-1:2017(E), the absorption capacity of the blood simulant solution is ≥18.0 g/g, Preferably ≥18.5 g/g; the absorption rate of the blood simulant solution is ≤45 s, preferably ≤40 s, more preferably ≤38 s; when human blood is used as the detection medium, according to ISO 19699-1:2017(E), the absorption capacity of the human blood is ≥8.0 g/g, preferably ≥8.3 g/g, more preferably ≥8.6 g/g; the absorption rate of the human blood is ≤45 s, preferably ≤40 s, more preferably ≤35 s, most preferably ≤25 s. The present invention combines organic cross-linking and inorganic cross-linking for surface modification, so that the resin has a gradual hierarchical structure, thereby ensuring that it has excellent blood absorption properties, while also having excellent water absorption properties and gel strength, and other performance.

Dependencies are inferred from the claim text.