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US 11,731,105 B2Granted
Super absorbent polymer and method for preparing same
AssigneeLG Chem, Ltd.
InventorsKi Hyun Kim, Kyu Pal Kim, Gi Cheul Kim, Seul Ah Lee, Sang Gi Lee
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Abstract
The present invention relates to a super absorbent polymer. The super absorbent polymer contains polymer particles formed of large pores in a certain amount or more, and thus can exhibit large surface area and excellent initial absorption capacity. Therefore, when the super absorbent polymer is used, it can provide a sanitary material such as a diaper or a sanitary napkin which can quickly absorb body fluids and impart a dry and soft touch feeling.
Claims13
A super absorbent polymer comprising:
- a base polymer powder including a cross-linked polymer obtained by crosslinking polymerization of a water-soluble ethylenically unsaturated monomer having an acidic group of which at least a part is neutralized in the presence of an encapsulated foaming agent;
- and
- a surface cross-linked layer that is further cross-linked from the cross-linked polymer and is formed on the base polymer powder,
- wherein M1 is a super absorbent polymer particle having three or more pores on its surface, which have a diameter of 20 to 200 μm,
- wherein M0 is a super absorbent polymer particle having a particle diameter of 300 to 425 μm, and
- wherein a ratio (M1/M0*100) is 10% or more, and
- wherein a distilled water absorption capacity of the super absorbent polymer is at least 150 g/g.
4 more elements
A super absorbent polymer comprising:
- a base polymer powder including a cross-linked polymer obtained by crosslinking polymerization of a water-soluble ethylenically unsaturated monomer having an acidic group of which at least a part is neutralized in the presence of an encapsulated foaming agent;
- and
- a surface cross-linked layer that is further cross-linked from the cross-linked polymer and is formed on the base polymer powder,
- wherein a distilled water absorption capacity is at least 150 g/g.
1 more element
Dependencies are inferred from the claim text.