Method for producing super absorbent polymer and super absorbent polymer
AssigneeLG Chem, Ltd.
InventorsKi Youl Yoon, Hyo Sook Joo, Gi Cheul Kim, Hyeon Choi, Ju Eun Kim
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Abstract
The present invention relates to a super absorbent polymer having more improved absorbency under pressure and liquid permeability, and a method for producing the same. The super absorbent polymer comprises a base polymer powder including a cross-linked polymer of a monomer containing a water-soluble ethylenically unsaturated compound or its salt; and a surface cross-linked layer that is formed on the base polymer powder and is further cross-linked from the cross-linked polymer, wherein a glass hollow particle having a micron-scale particle size is included on the surface cross-linked layer.
Claims10
A method for producing a super absorbent polymer comprising the steps of:
- carrying out a crosslinking polymerization of a monomer composition containing a water-soluble ethylenically unsaturated compound or its salt in the presence of an internal crosslinking agent to form a cross-linked hydrogel polymer;
- drying, pulverizing, and classifying the cross-linked hydrogel polymer to form a base polymer powder;
- and
- surface-crosslinking the base polymer powder in the presence of one or more glass hollow particles having a micron-scale particle size and a surface crosslinking agent to form a surface cross-linked layer.
A super absorbent polymer comprising:
- a base polymer powder including a cross-linked polymer of a monomer containing a water-soluble ethylenically unsaturated compound or its salt;
- and
- a surface cross-linked layer that is formed on the base polymer powder and is further cross-linked from the cross-linked polymer,
- wherein one or more glass hollow particles having a micron-scale particle size is included on the surface cross-linked layer.
Dependencies are inferred from the claim text.