Surface-treated superabsorbent polymer particles
May 25, 2020. 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 ReferencesSurface-treated superabsorbent polymer particles Surface treatment process for improving dispersibility of an absorbent composition, and product thereof Absorption rate of absorbent polymers by treating with glyoxal Method for curing polymers containing one or more carboxy or anhydride functions and compositions Method for curing polymers containing one or more carboxy or anhydride functions by means of polymers having hydroxyamide groups, and compositions Method for curing polymers containing hydroxyalkylamide groups by means of nonpolymeric polycarboxylic acids, and compositions Self-curing copolymers containing both hydroxyamide functions and carboxy or anhydride functions, and compositions Water-absorbent resin having improved water-absorbency and improved water-dispersibility and process for producing same Method for producing improved water-absorbent resins Absorbent article InventorsAssigneeApplicationNo. 579108 filed on 05/25/2000US Classes:428/402, Particulate matter (e.g., sphere, flake, etc.)428/403, Coated428/407, Including synthetic resin or polymer525/329.9, Nitrogen containing chemical treating agent526/306, Plural amide group containing528/374, From mercaptan or mercaptide-containing reactant528/375, Two or more mercaptan or mercaptide reactants, or mixture thereof, or with additional reactant-containing sulfur528/386With reactant containing only hydrogen and carbon atomsExaminersPrimary: Kiliman, LeszekAttorney, Agent or FirmForeign Patent References
International ClassB32B 005/16AbstractSurface-treated superabsorbent polymer particles obtained by mixing 100 parts by weight of superabsorbent polymer particles with 0.001 to 10 parts by weight of a hydroxyalkylamide, and heating the surface-treated superabsorbent polymer particles to crosslink molecular chains existing at least in the vicinity of the surfaces of the superabsorbent polymer particles is disclosed. Surface crosslinking the superabsorbent polymer particles with a hydroxyalkylamide substantially increases both the rate of liquid absorption and the quantity of liquid absorbed and retained by the superabsorbent particles.Other References
Field of SearchNitrogen containing chemical treating agentContains nitrogen atom in a heterocyclic ring Chemical treating agent is a nitrogen-containing compound Oxygen compound is a carboxylic acid, ester, anhydride, or lactone thereof Plural amide group containing Particulate matter (e.g., sphere, flake, etc.) Coated Including synthetic resin or polymer | |
