Superabsorbent polymer material comprising non-crosslinked polyacrylic acid polymer
AssigneeThe Procter & Gamble Company
InventorsArsen Arsenov Simonyan, Natasa Dijakov, Dimitris Ioannis Collias, Yiping Sun
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Abstract
Superabsorbent polymer material comprising cross-linked polyacrylic acid and salts thereof. The superabsorbent polymer material further comprising at least 3.0 weight-%, based on the total weight of the superabsorbent polymer material, of soluble polyacrylic acid polymers. A method for making such superabsorbent polymer materials is also disclosed.
Claims11
A superabsorbent polymer material comprising cross-linked polyacrylic acid and salts thereof, the superabsorbent polymer material further comprising at least 3.0 weight-%, based on the total weight of the superabsorbent polymer material, of soluble polyacrylic acid polymers,
- wherein the cross-linked polyacrylic acid and salts thereof have an average distance Rxl between neighboring crosslinks, as calculated for the superabsorbent polymer material loaded with 20 g of saline with 0.9%w NaCl per gram of dry superabsorbent polymer material, and
- wherein the at least 3.0 weight-% of soluble polyacrylic acid polymers have an average diameter of gyration 2*Rg, and
- wherein the ratio of 2*Rg to Rxl is at least 1.1.
Dependencies are inferred from the claim text.