Salt tolerant super absorbents
Patent 5274018 Issued on December 28, 1993. Estimated Expiration Date: 
May 24, 2011. 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.
May 24, 2011. 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 ReferencesMaterial for absorbing aqueous fluids Patent #: 4535098 InventorsApplicationNo. 705463 filed on 05/24/1991US Classes:524/166, Metal524/236, Trivalent or tetravalent nitrogen atom other than unsubstituted ammonium524/599, From carboxylic acid or derivative reactant524/602Nitrogen-containing reactantExaminersPrimary: Schofer, Joseph L.Assistant: Smith, Jerry Attorney, Agent or FirmInternational ClassesC08K 005/41C08L 077/06 AbstractThe invention relates to a novel absorbent composition and manner of using the same. The absorbent has at least the following two components:(a) a swellable hydrophobic polymer being capable of absorbing a quantity of water which is at least about 10 times the dry weight of said polymer; and(b) an amount of an ionizable surfactant sufficient to form at least a monolayer of said surfactant about said polymer.The novel absorbent is substantially tolerant to an aqueous solution having a soluble salt, such as sodium chloride. | |
