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US 9,149,552 B1Granted
Coating providing modulated release of volatile compositions
AssigneeEnviroscent, Inc.
InventorsBao Trong Do, Eric Mehnert, Nicholas D. McKay, Jr., Candace Branch, Jeffrey Sherwood
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Abstract
Described are modulating coatings that are configured to provide an improved release profile of a volatile composition from a base material, wherein the modulating coating includes a barrier substance that is configured to hinder a release of the volatile composition through the modulating coating, and a hygroscopic substance that is configured to facilitate the release of the volatile composition through the modulating coating.
Claims15
An article comprising
- a base material comprising a pulp composition comprising fibers, wherein pores are formed between the fibers;
- a volatile composition comprising a member selected from the group consisting of fragrances, flavor compounds, odor-eliminating compounds, aromatherapy compounds, natural oils, essential oils, water-based scents, odor neutralizing compounds, and combinations thereof, wherein the pores of the base material are at least partially filled with the volatile composition;
- and
- a modulating coating formed by dissolving a barrier substance in an aqueous suspension of hygroscopic silica nanoparticles so that a surface charge of the hygroscopic silica nanoparticles causes the barrier substance to group around the hygroscopic silica nanoparticles through electrostatic interactions in the modulating coating;
- wherein the modulating coating further comprises a continuous phase of the barrier substance and the hygroscopic silica nanoparticles dispersed therein;
- wherein the modulating coating at least partially covers one outer surface of the base material;
- wherein the barrier substance is selected from a group consisting of maltodextrin, dextrin, polysaccharide, carbohydrate, natural unmodified starch, modified starch, and combinations thereof;
- wherein the hygroscopic silica nanoparticles comprise a spherical surface area defined by a diameter ranging from 1 nm-100 nm;
- wherein the barrier substance hinders a release of the volatile composition through the modulating coating;
- wherein the hygroscopic silica nanoparticles facilitate the release of the volatile composition through the modulating coating;
- and
- wherein the article exhibits a ratio of a first day weight-loss value to a last day weight-loss value in a range of 1 to 20 over a 30 day life cycle of the article.
9 more elements
An article comprising
- a base material comprising fibers, wherein pores are formed between the fibers;
- a volatile composition comprising a member selected from the group consisting of fragrances, flavor compounds, odor-eliminating compounds, aromatherapy compounds, natural oils, essential oils, water-based scents, odor neutralizing compounds, and combinations thereof, wherein the pores of the base material are at least partially filled with the volatile composition;
- and
- a modulating coating formed by dissolving a barrier substance in an aqueous suspension of hygroscopic silica nanoparticles so that a surface charge of the hygroscopic silica nanoparticles causes the barrier substance to group around the hygroscopic silica nanoparticles through electrostatic interactions in the modulating coating;
- wherein the modulating coating further comprises a continuous phase of the barrier substance and the hygroscopic silica nanoparticles dispersed therein;
- wherein the modulating coating at least partially covers one outer surface of the base material;
- wherein the barrier substance is selected from a group consisting of maltodextrin, dextrin, polysaccharide, carbohydrate, natural unmodified starch, modified starch, and combinations thereof;
- wherein the hygroscopic silica nanoparticles comprise a spherical surface area defined by a diameter ranging from 1 nm-100 nm;
- wherein the barrier substance hinders a release of the volatile composition through the modulating coating;
- wherein the hygroscopic silica nanoparticles facilitate the release of the volatile composition through the modulating coating;
- and
- wherein the article exhibits a ratio of a first day weight-loss value to a last day weight-loss value in a range of 1 to 20 over a 30 day life cycle of the article.
9 more elements
Dependencies are inferred from the claim text.