Loading patent…
AssigneeThe Procter & Gamble Company
InventorsMattias Schmidt, Axel Meyer, Bruno Johannes Ehrnsperger, Stephen Allen Goldman, Edward Joseph Urankar
Estimating the term…
This invention is directed to coated water-swellable materials, typically solid, particulate, water-swellable materials, i.e. materials that comprise hydrogel-forming polymers, whereof at least a part is coated with a coating, which substantially does not break when the polymers swell, as set out in the method herein. Said coating is present at a level of at least 1% by weight of the water-swellable material. The coating comprises preferably an elastomeric polymeric material. The invention also relates products, e.g., disposable absorbent articles, comprising such coated water-swellable material.
A water-swellable material that comprises hydrogel forming polymers in the form of particles, the hydrogel forming polymers being coated by a coating formed from a coating agent comprising an elastomeric polymeric material, whereby said coating is present at a level of at least 1% by weight of the water-swellable material, and wherein the water swellable material has a CCRC of at least 10 g/g and wherein, for at least a part of the coated hydrogel forming polymers, said coating is non-breaking, when the water-swellable material is swollen to equilibrium in 0.9% saline solution and wherein said part of the coated hydrogel forming polymers that has a non-breaking coating of an elastomeric polymeric material is at least 60% by weight of the material having a coating with an elastomeric, polymeric material.
A water-swellable material that comprises hydrogel forming polymers in the form of particles, the hydrogel forming polymer being coated by a coating formed from a coating agent comprising a polyurethane, whereby said coating is present at a level of at least 1% by weight of the water-swellable material, and wherein the water swellable material has a CCRC of at least 10 g/g and wherein, for at least a part of the coated hydrogel forming polymers, said coating is non-breaking, when the water-swellable material is swollen to equilibrium in 0.9% saline solution.
Dependencies are inferred from the claim text.