Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component
Patent
1997-03-17
2000-02-22
Copenheaver, Blaine
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Composite having voids in a component
4283157, 4283211, 502402, 502404, 521 63, 521 64, 521905, B32B 326, C08J 928
Patent
active
060277955
ABSTRACT:
An absorbent, microporous foam comprising a crosslinked polymer having interconnected fluid cells distributed throughout its mass, wherein the fluid cells have a diameter of between about 0.1 and about 100 .mu.m, and wherein the foam can rapidly absorb at least about twice its dry weight in fluid, is disclosed. Also disclosed is a method for producing such microporous, absorbent foams. In this method: (a) a crosslinkable polymer and a first solvent are mixed to form a stable solution which can be induced to phase separate; (b) the stable solution is induced to phase separate into a polymer concentrated phase and a polymer dilute phase; (c) the polymer is induced to crosslink in the polymer concentrated phase for a predetermined period of time thereby forming a microporous material; and (d) the microporous material is dried to produce the absorbent foam.
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Gehrke Stevin H.
Kabra Bhagwati G.
Copenheaver Blaine
University of Cincinnati
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