Phase-separated membrane
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United States of America Patent
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Oct 8, 1996
Grant Date -
N/A
app pub date -
Mar 29, 1995
filing date -
Jul 30, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
A phase-separated membrane in which the control of permeation rate and the control of permeation amount of a minute amount of drugs or other chemical substances are easily performed is provided. The phase-separated membrane has a constitution that a crosslinked gelatin phase 1 and an uncrosslinked segmented polyurethane phase 2 are present as a mixture. The segmented polyurethane phase is in a solid state at ordinary temperatures and is molten into a liquid state at 30.degree. to 40.degree. C. which is near the temperature of human skin.
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