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US 7,923,479 B2Granted
Superabsorbent foam, method for the production thereof, and use thereof
AssigneeBASF SE
InventorsSamantha Champ, Mariola Wanior, Andreas Reifschneider
Life of this patent
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AssigneeBASF SE
InventorsSamantha Champ, Mariola Wanior, Andreas Reifschneider
Estimating the term…
Superabsorbent foam comprising superabsorbent fiber and/or fruit fiber, processes for producing superabsorbent foam having improved wet strength by foaming a crosslinkable aqueous mixture comprising at least 50 mol % neutralized acid-functional monoethylenically unsaturated monomer or at least one basic polymer, crosslinker, superabsorbent synthetic fiber and/or fruit fiber and at least one surfactant and subsequently polymerizing the monomer in the foamed mixture or crosslinking the basic polymer to form a hydrogel foam and use of the thus obtainable foam in hygiene articles to absorb body fluids, in dressing material to cover wounds, as a sealing material, as a packaging material, as a soil improver, as a soil substitute, to dewater sludges, to thicken waterborne paints or coatings in the course of disposing of residual quantities thereof, to dewater water-containing oils or hydrocarbons or as a material for filters in ventilation systems.
A superabsorbent foam comprising from 0.1 to 5% by weight of a natural fiber selected from the group consisting of apple fiber, orange fiber, tomato fiber, wheat fiber, oat fiber, and mixtures thereof;
A superabsorbent foam comprising at least one natural fiber selected from the group consisting of apple fiber, orange fiber, tomato fiber, wheat fiber, oat fiber, and mixtures thereof;
A process for producing a superabsorbent foam having improved wet strength, which comprises foaming a crosslinkable aqueous mixture comprising at least a 50 mol% neutralized acid-functional monoethylenically unsaturated monomer or at least one basic polymer, a crosslinker, a natural fiber selected from the group consisting of apple fiber, orange fiber, tomato fiber, wheat fiber, and mixtures thereof, and at least one surfactant, and subsequently polymerizing the monomer in the foamed mixture or crosslinking the basic polymer in the foamed mixture to form a hydrogel foam, wherein the aqueous mixture comprises from 0.1 to 5% by weight of the natural fiber.
Dependencies are inferred from the claim text.