Shell/core particulates of superabsorbent polymers
February 7, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesHighly absorbent materials having good wicking characteristics which comprise hydrogel particles and surfactant treated filler Pellets of clay and superabsorbent polymer Reconstitution of superabsorbent polymer fines using persulfate salts Absorbent products containing hydrogels with ability to swell against pressure Process for the conversion of fine superabsorbent polymer particles into larger particles Vibration damping superabsorbent composites High performance absorbent particles and methods of preparation High performance absorbent particles and methods of preparation Surface crosslinked and surfactant coated absorbent resin particles and method of preparation Absorbent members for body fluids having good wet integrity and relatively high concentrations of hydrogel-forming absorbent polymer Patent #: 5669894 InventorsAssigneeApplicationNo. 796730 filed on 02/07/1997US Classes:428/407, Including synthetic resin or polymer525/344Inorganic sulfur compound contains sulfur atom bonded to at least two oxygen atomsExaminersPrimary: Le, Hoa VanAttorney, Agent or FirmInternational ClassB32B 005/16Foreign Application Priority Data1996-02-07 FRAbstractShell/core distortion-resistant particulates of a partially crosslinked superabsorbent polymer, the gradient of partial crosslinking of which being to such extent that the shells are harder and less flexible than the cores thereof, have a capacity to absorb 0.9% saline water of at least 50 g/g and the modulus of which is at least 35,000 Pa; a bed of a saline water gel of the subject particulates has a saline water absorption of at least 20 g/g and a porosity of at least 500 g. | |
