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US 12,605,694 B2Granted
Super absorbent polymer
AssigneeLG Chem, Ltd.
InventorsKyung Su Kim, Kwang In Shin, Soo Young Kwak
Life of this patent
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Abstract
A polyacrylic acid (salt)-based super absorbent polymer may satisfy Equation 1. In Equation 1, DSap is a diffusion coefficient of ethanol in the polyacrylic acid (salt)-based super absorbent polymer measured by nuclear magnetic resonance (NMR) spectroscopy, and DE is a diffusion coefficient of pure ethanol as measured by nuclear magnetic resonance spectroscopy. (DSap/DE)×100(%)≤92.5(%) [Equation 1]
Claims10
A polyacrylic acid (salt)-based super absorbent polymer, the polyacrylic acid (salt)-based super absorbent polymer satisfying Equation 1,
- (DSap/DE)×100(%)≤92.5(%) [Equation 1]
- wherein, in Equation 1:
- DSap is a diffusion coefficient of ethanol in the polyacrylic acid (salt)-based super absorbent polymer measured by nuclear magnetic resonance (NMR) spectroscopy, and
- DE is a diffusion coefficient of pure ethanol as measured by nuclear magnetic resonance spectroscopy;
- wherein when the polyacrylic acid (salt)-based super absorbent polymer is swelled in water having an electrical conductivity value of 100 to 130 μS/cm for 1 minute, a maximum capacity of water that the polyacrylic acid (salt)-based super absorbent polymer is able to hold (free swelling capacity) is 170 g/g or more.
2 more elements
Dependencies are inferred from the claim text.