Polyurethane sponge having rapid iodine release
First Claim
1. A composition comprising a polyurethane foam having dispersed evenly therein solid particles of a complex of polyvinylpyrrolidone and iodine, said polyurethane comprising the reaction product of a diisocyanate, polyglycol and water, said polyurethane and polyvinylpyrrolidone being substantially uncomplexed so that said foam, when contacted by an aqueous liquid, instantaneously releases said complex into said liquid.
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Accused Products
Abstract
A polyurethane composition has particles of solid polyvinylpyrrolidone-iodine complex evenly distributed throughout the polyurethane matrix so that the complex does not associate with the polyurethane to any appreciable extent. In one embodiment of the composition, the polyurethane is thermoplastic for coating or molding applications. In another embodiment, the composition is a polyurethane foam particularly useful as a sponge for scrubbing which provides almost instantaneous release of the complex. The sponge may be provided in a package which includes other items useful for scrubbing.
45 Citations
23 Claims
- 1. A composition comprising a polyurethane foam having dispersed evenly therein solid particles of a complex of polyvinylpyrrolidone and iodine, said polyurethane comprising the reaction product of a diisocyanate, polyglycol and water, said polyurethane and polyvinylpyrrolidone being substantially uncomplexed so that said foam, when contacted by an aqueous liquid, instantaneously releases said complex into said liquid.
- 13. A composition comprising a polyurethane having dispersed evenly therein solid particles of a complex of a water soluble polymer and a germicidal agent, said polyurethane and said water soluble polymer being substantially uncomplexed so that said composition, when contacted by an aqueous liquid, instantaneously releases said complex into said liquid.
- 18. A package comprising materials for surgical scrubbing including a sponge fabricated from a polyurethane foam comprising a diisocyanate, polyether glycol and water, said polyurethane having solid particles of a complex of polyvinylpyrrolidone and iodine incorporated in the foam matrix thereof, said polyurethane and polyvinylpyrrolidone being substantially uncomplexed so that said foam, when contacted by an aqueous liquid, instantaneously releases said complex into said liquid.
Specification