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AssigneeKimberly-Clark Worldwide, Inc.
InventorsWilliam Grover Reeves, William Galey Robertson, Mary Jeanne Dupuis, Eric Scott Kepner, Thomas Patrick Jorgenson, Gerald Lee Richmond
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An absorbent composition comprising an uncrosslinked, high molecular weight polymer, wherein the uncrosslinked, high molecular weight polymer is treated by a means to effectively insolubilize the uncrosslinked, relatively high molecular weight polymer such that the absorbent composition exhibits desirable absorbent properties. In particular, the absorbent composition has the ability to absorb a large quantity of liquid. The absorbent composition is useful in disposable absorbent products, such as those disposable absorbent products that are used to absorb bodily liquids. Suitable polymers include polyethylene oxide, poly(acrylic acid), poly(vinyl alcohol), and poly(vinyl pyrrolidone) wherein the polymer has a weight average molecular weight that is greater than about 1,000,000.
An absorbent composition comprising an uncrosslinked polymer, wherein the uncrosslinked polymer has a weight average molecular weight greater than about 1,000,000 and wherein the absorbent composition exhibits a Free Swell value that is at least about 15 grams of water per gram of absorbent composition and a Centrifuge Retention Capacity value that is at least about 8 grams of water per gram of absorbent composition, wherein the time period used to determine both the Free Swell value and the Centrifuge Retention Capacity value is about 19 hours.
An absorbent composition comprising an uncrosslinked polymer, wherein the uncrosslinked polymer has a weight average molecular weight greater than about 1,000,000 and wherein the absorbent composition exhibits a Free Swell value that is at least about 15 grams of a 0.9 weight percent solution of sodium chloride in distilled water per gram of absorbent composition and a Centrifuge Retention Capacity value that is at least about 8 grams of a 0.9 weight percent solution of sodium chloride in distilled water per gram of absorbent composition, wherein the time period used to determine both the Free Swell value and the Centrifuge Retention Capacity value is about 19 hours.
A process for preparing an absorbent composition comprising an uncrosslinked polymer, the process comprising:
A process for preparing an absorbent composition comprising an uncrosslinked polymer, the process comprising:
A process for preparing an absorbent composition comprising a solvent insoluble uncrosslinked polymer, the process comprising treating a solvent soluble, uncrosslinked polymer by means of heat and pressure effective to insolublize the uncrosslinked polymer, wherein the absorbent composition exhibits a Free Swell value that is at least about 15 grams of water per gram of absorbent composition and a Centrifuge Retention Capacity value that is at least about 8 grams of water per gram of absorbent composition, wherein the time period used to determine both the Free Swell value and the Centrifuge Retention Capacity value is about 19 hours.
A process for preparing an absorbent composition comprising a solvent insoluble uncrosslinked polymer, the process comprising treating a solvent soluble, uncrosslinked polymer by means of heat and pressure effective to insolublize the uncrosslinked polymer, wherein the absorbent composition exhibits a Free Swell value that is at least about 15 grams of a 0.9 weight percent solution of sodium chloride in distilled water per gram of absorbent composition and a Centrifuge Retention Capacity value that is at least about 8 grams of a 0.9 weight percent solution of sodium chloride in distilled water per gram of absorbent composition, wherein the time period used to determine both the Free Swell value and the Centrifuge Retention Capacity value is about 19 hours.
A process for preparing an absorbent composition comprising a solvent insoluble uncrosslinked polymer, the process comprising complexing a solvent soluble, uncrosslinked polymer with a complexing agent, wherein the absorbent composition exhibits a Free Swell value that is at least about 15 grams of water per gram of absorbent composition and a Centrifuge Retention Capacity value that is at least about 8 grams of water per gram of absorbent composition, wherein the time period used to determine both the Free Swell value and the Centrifuge Retention Capacity value is about 19 hours.
Dependencies are inferred from the claim text.