Adhesive polyethylene oxide hydrogel sheet and its production
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United States of America Patent
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Aug 4, 1987
Grant Date -
N/A
app pub date -
Jun 30, 1986
filing date -
Jun 30, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A solid sheet of adhesive hydrophilic gel which is a homogeneous aqueous mixture, substantially free of unbound water, monomers and crosslinking agents, consisting essentially of an amount dispersed uniformly in water of from about 4 to 35 wt % of a crosslinked polyethylene oxide, effective to form with the water a tacky surfaced viscoelastic solid which sheet of hydrophilic gel is produced by subjecting a liquid film of an aqueous solution having a viscosity of about 2-2,000.times.10.sup.3 cps of a linear water soluble polyethylene oxide having a weight average molecular weight from about 0.02-6.times.10.sup.6 Daltons to an amount of high energy radiation effective to convert the liquid film to a sheet of the viscoelastic solid having an adhesive face.
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