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US 2019/0194366 A1Published application
Super Absorbent Polymer And Method For Preparing Same
AssigneeLG Chem, Ltd.
InventorsJung Min Sohn, Hyemin Lee, Chang Sun Han
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Abstract
The present invention relates to a super absorbent polymer and a method for preparing the same. According to the method for preparing a super absorbent polymer of the present invention, the super absorbent polymer +having improved absorption capacity and permeability can be prepared.
Claims11
A method for preparing a super absorbent polymer comprising:
- thermally polymerizing or photo-polymerizing a monomer composition including an acrylic acid-based monomer having an acidic group, of which at least a part is neutralized, and a polymerization initiator to form a hydrogel polymer;
- drying the hydrogel polymer;
- pulverizing the dried polymer;
- mixing the pulverized polymer with a surface crosslinking agent and an aliphatic alcohol of C6 or greater to form a mixture;
- heating the mixture to carry out a surface modification.
2 more elements
A super absorbent polymer comprising a crosslinked polymer obtained by polymerizing and internally crosslinking an acrylic acid-based monomer having an acidic group, of which at least a part is neutralized;
- and a surface modifying layer formed on the surface of the crosslinked polymer,
- wherein a centrifuge retention capacity (CRC) measured according to EDANA method WSP 241.3 is 25 to 35 g/g, an absorbency under load (AUL) at 0.7 psi measured according to EDANA method WSP 242.3 is 20 to 30 g/g, and a surface tension is 65 to 73 mN/m.
Dependencies are inferred from the claim text.