Patent ID: 7524561
Filing Date: 2009-04-28
Classification: A61L,C08J,C09D,Y10T

Abstract:
1. A water-swellable material that comprises hydrogel forming polymers, said water swellable material having a CCRC of at least 10 g/g, said hydrogel forming polymers being coated by a first and second coating wherein at least one of said first and second coating is formed from a coating agent comprising an elastomeric polymeric material, said coating agent being present at a level of at least 1% by weight of the water-swellable material 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.