Readily shapeable xerogels having controllably delayed swelling properties
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United States of America Patent
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Issued Date -
Feb 8, 2007
app pub date -
Jul 28, 2006
filing date -
Jul 28, 2005
priority date (Note) -
Abandoned
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Abstract
Hydrogels are described which have delayed swelling properties. A hydrogel is formed by reacting a hydrophilic monomer, a first crosslinker, and a second crosslinker. The first crosslinker defines the volume expansion of the hydrogel in an aqueous environment, and the second crosslinker, which is biodegradable, can modulate the swelling rate of the hydrogel in aqueous solution. In its dry state, the hydrogel (xerogel) is flexible and elastic. It can also be cut with a knife or scissors, or molded or shaped by hand. The ready shapeability of the xerogel by trimming or compression affords a superior hydrogel for medical applications.
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