Absorbent foam materials for aqueous fluids made from high internal phase emulsions having very high water-to-oil ratios
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United States of America Patent
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Jul 22, 1997
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app pub date -
Nov 29, 1995
filing date -
Jan 10, 1995
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Abstract
Low density collapsed absorbent foams materials that, upon contact with aqueous fluids, in particular urine, can expand and absorb these fluids. These low density foams typically have an expanded thickness from about 6 to about 10 times the thickness of the foams in their collapsed state. These low density foams are made by polymerizing high internal phase emulsions (HIPEs) where the volume to weight ratio of the water phase to the oil phase is in the range of from about 55:1 to about 100:1.
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