Back to results
US 4,058,124 AGranted
Disposable absorbent articles containing particulate, free-flowing, insoluble swellable polymers
AssigneeUnion Carbide Corporation
InventorsSteven N. Yen, Frederick D. Osterholtz
Life of this patent
Estimating the term…
Abstract
Particulate, free-flowing, insoluble swellable polymers are provided which are comprised of a mixture of an insoluble, swellable hydrogel and inert filler. The mixtures are free-flowing powders or granules which can absorb many times their weight of water and hence are useful as a soil amendment.
Claims5
A disposable absorbent article containing a mixture prepared by:
- a. blending at least one water soluble pulverulent hydrophilic polymer and at least one pulverulent inert filler in a ratio of polymer to filler of from about 1:9 to about 9:1, a substantial portion of said filler having a particle size less than that of said polymer and present in an amount sufficient to cover a substantial portion of the surface area of said pulverulent polymer.
- b. thereafter while said blending is continued, contacting said mixture under thorough agitation with a finely divided spray of water at a rate and in an amount not to exceed that at which the mixture is maintained in a free-flowing particulate form, and
- c. thereafter exposing said mixture in said free-flowing particulate form to ionizing radiation for a period of time to crosslink said polymer.
Dependencies are inferred from the claim text.