Patent ID: 9302248
Filing Date: 2016-04-05
CPC Classification: A61L,B01J,C08F,C08J

Claim Text:
1. A particulate superabsorbent polymer composition having improved stability comprising a particulate superabsorbent polymer and from 0.01 wt % to about 5 wt % based on the particulate superabsorbent polymer composition weight of a neutralized aluminum salt applied to the surface of the particulate superabsorbent polymer, in the form of an aqueous neutralized aluminum salt solution having a pH value from about 5.5 to about 8; wherein the particulate superabsorbent polymer composition has a Centrifuge Retention Capacity (CRC) of from about 25 grams to about 40 grams of 0.9 weight percent sodium chloride aqueous per gram of the particulate superabsorbent polymer composition, wherein the CRC is measured either before or after subjecting the superabsorbent polymer composition to a Processing Test, and an original Free Swell Gel Bed Permeability (FSGBP) of from about 20×10 −8 cm 2 to about 200×10 −8 cm 2 prior to subjecting the particulate superabsorbent polymer composition to the Processing Test; and a compressibility of from 1.30 mm 2 /N to about 4 mm 2 /N and a permeability stability index of from 0.60 to about 0.99 when subjecting the particulate superabsorbent polymer composition to a Processing Test.