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AssigneeISP Investments Inc.
InventorsRussell B. Biss, Jeffrey M. Cohen, John J. Merianos, Paul D. Taylor
Estimating the term…
A free-standing, porous foam product comprising an integral network of PVP molecules hydrogen-bonded to H.sub.2 O.sub.2 molecules, optionally including a water-soluble gelling agent; e.g. hydroxyethyl cellulose; in an amount up to 60% by weight of the product, its PVP content being about 25-90% by weight of the product, and the H.sub.2 O.sub.2 content being about 5-24% by weight. In the absence of a gelling agent, the product has a bulk density of about 0.3 to about 0.5 g/cc and a porosity of about 60-70%. When a gelling agent is present in the product, its bulk density and porosity of the product is substantially reduced and, accordingly, it has a more foam-like structure and appearance.
A process for making a free-standing, porous foam product which consist essentially of PVP molecules hydrogen bonded to H.sub.2 O.sub.2 molecules, optionally including a water-soluble gelling agent, the PVP content being about 20-90% by weight, the H.sub.2 O.sub.2 content being about 5-24% by weight, about 20-60% by weight of a gelling agent, and about 0-8% water by weight, the bulk density being about 0.3-0.5 g/cc or less, and the porosity being about 60-70%, or less, if the gelling agent is present, which comprises
Dependencies are inferred from the claim text.