HYDROPHILIC POLYURETHANE FOAM
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United States of America Patent
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Issued Date -
Oct 17, 2013
app pub date -
Apr 11, 2013
filing date -
Apr 13, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for making hydrophilic polyurethane foam includes providing methylene diphenyl diisocyanate, mixing polyether polyols with the methylene diphenyl diisocyanate, and allowing the methylene diphenyl diisocyanate and the polyether polyols to form the hydrophilic polyurethane foam. The hydrophilic polyurethane foam has a content of ethylene oxide that is between about 30-100% by weight. The methylene diphenyl diisocyanate and polyols are mixed in a one-stage process. The hydrophilic polyurethane foam absorbs water in time period that is less than about 30 seconds.
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