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US 12,239,958 B2Granted
Super absorbent polymer composition and preparation method for the same
AssigneeLG Chem, Ltd.
InventorsDae Woo Nam, Jin Seok Seo, Sujin Kim
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Abstract
This invention relates to a superabsorbent polymer composition and a method for preparing the superabsorbent polymer composition. According to the present disclosure, there are provided a superabsorbent polymer composition that can exhibit a rapid absorption time without using a blowing agent, and a method for preparing the superabsorbent polymer composition.
Claims16
A superabsorbent polymer composition comprising:
- a superabsorbent polymer comprising a base resin comprising crosslinked polymer of acrylic acid based monomers having acid groups of which at least a part are neutralized, and an internal crosslinking agent;
- and a surface crosslink layer formed on the surface of the base resin, in which the crosslinked polymer is additionally crosslinked by a surface crosslinking agent;
- and
- remaining surface crosslinking agent that does not form the surface crosslink layer,
- wherein the remaining surface crosslinking agent that does not form the surface crosslink layer comprises a carbonate based compound and a diol based compound, a content of the carbonate based compound is 100 ppm or more based on a total weight of the superabsorbent polymer composition, and the content of the diol based compound is 1,000 ppm or more based on the total weight of the superabsorbent polymer composition, and
- the superabsorbent polymer composition fulfills the following 1) to 3):
- 1. Vortex time according to a vortex method is 65 seconds or less;
- 2. Extractable contents after swelling for 16 hours, measured according to EDANA method WSP 270.3, is 15 wt % or less, based on the total weight of the superabsorbent polymer composition;
- and
- 3. Bulk density is 0.67 g/cm3 or more.
7 more elements
Dependencies are inferred from the claim text.