Materials comprising water-soluble polymer particles and methods of making and using them
First Claim
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1. A material comprising a substrate, a foam, and a plurality of water-soluble polymer particles,wherein each of the plurality of water-soluble polymer particles comprises an active ingredient, the foam binds to the substrate, and the water-soluble polymer particles are trapped between the substrate and the foam.
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Abstract
One aspect of the invention relates to new materials for storing, protecting, selectively releasing, and applying active ingredients (e.g. pharmaceuticals and other chemicals). In certain embodiments, the invention provides materials impregnated with water-soluble polymer particles which contain active ingredients which may be selectively released and dispensed in response to contact with water or another liquid.
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14 Claims
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1. A material comprising a substrate, a foam, and a plurality of water-soluble polymer particles,
wherein each of the plurality of water-soluble polymer particles comprises an active ingredient, the foam binds to the substrate, and the water-soluble polymer particles are trapped between the substrate and the foam.
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2. A material comprising a substrate, two layers of foam, and a plurality of water-soluble polymer particles,
wherein each of the plurality of water-soluble polymer particles comprises an active ingredient, the substrate is sandwiched between the two layers of foam, and the water-soluble polymer particles are trapped between the substrate and at least one of the two layers of foam, wherein said at least one of the two layers of foam binds to the substrate.
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11. A method for preparing a water-soluble polymer particle-impregnated material, comprising the steps of:
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coating a substrate with a plurality of water-soluble polymer particles; providing a mixture comprising water, surfactant, and a prepolymer mixture; dispensing the mixture onto the water-soluble polymer particle-coated substrate; and allowing the mixture to cure into a foam, thereby forming a water-soluble polymer particle-impregnated material wherein the water-soluble polymer particles are trapped between the substrate and the foam.
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14. A method for preparing a water-soluble polymer particle-impregnated material, comprising the steps of:
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coating a substrate with a plurality of water-soluble polymer particles, wherein the substrate is an aperture non-woven material; providing a mixture comprising water, surfactant, and a prepolymer mixture; dispensing the mixture onto the water-soluble polymer particle-coated substrate, thereby permeating the substrate; and allowing the mixture to cure into a foam, thereby forming a water-soluble polymer particle-impregnated material.
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Specification