Hydrophilic polyurethane composition
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United States of America Patent
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Jan 17, 1989
Grant Date -
N/A
app pub date -
Nov 12, 1985
filing date -
Nov 12, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Water absorptive polyurethane composition, having high mechanical strength, is formed of A. about 25% to about 75% of a hydrophilic polyether polyurethane which is the reaction product of diethylene glycol and a polyoxyethylene glycol having a molecular weight of about 1000 to about 8000 with a polyisocyanate and B. about 75% to about 25% of a hydrophobic polyester polyurethane which is the reaction product of a polyfunctional polyester derived from the condensation of a polyol with a polybasic acid with a polyisocyanate.
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