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US 5,849,816 AGranted
Method of making high performance superabsorbent material
AssigneeLeonard Pearlstein
InventorsStuart P. Suskind, Leonard Pearlstein
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Abstract
A high performance absorbent particulate composition and a method of preparation in which a non-colloidal solid filler core is substantially encapsulated within a layer of hydrogel forming polymer is disclosed. Also disclosed are absorbent devices using the high performance absorbent particulate composition and methods of making these devices.
Claims28
A method for preparing a plurality of individual and discrete absorbent particles comprising the steps of:
- a) suspending an aqueous solution comprising an ethylenically unsaturated monomer capable of polymerization into a hydrogel forming polymer and an initiator in a water immiscible solvent in the presence of a surface active agent;
- b) initiating the polymerization of the ethylenically unsaturated monomer while suspended in said water immiscible solvent;
- and
- c) co-suspending water resistant solid core particles in said water immiscible solvent for a time sufficient to permit the individual and substantial encapsulation of the water resistant solid core particles by said hydrogel forming polymer to form said absorbent particles.
1 more element
Dependencies are inferred from the claim text.