Composite mixtures for improving gel strength of water absorbent gels
AssigneeThe Dow Chemical Company
InventorsMark J. McKinley, Dan P. Sheridan
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Abstract
Water absorbent compositions exhibiting increased gel strengths comprise a water-swellable hydrophilic polymer and an inorganic powder and are prepared by physically blending the polymer and powder. The compositions can be incorporated into film laminates and can be employed in preparing improved disposable diapers.
Claims22
An improved water absorbent composition comprising (1) a water absorbing amount of a lightly crosslinked, water-swellable hydrophilic polymer and (2) an inorganic powder in an amount sufficient to increase gel strength exhibited by said water absorbent composition, wherein said composition is prepared by physically blending said inorganic powder with said polymer and wherein said powder is blended with said polymer after the polymer has been polymerized and crosslinked.
A method for increasing the gel strength of a water absorbent composition comprising a water absorbent amount of a crosslinked water-swellable hydrophilic polymer wherein an inorganic powder is blended with said polymer in an amount sufficient to increase the gel strength of said water absorbent composition, said method comprising the physical blending of said inorganic powder with said polymer, and wherein said powder is blended with said polymer after the polymer has been polymerized and crosslinked.
Dependencies are inferred from the claim text.