Coating providing modulated release of volatile compositions
AssigneeEnviroscent, Inc.
InventorsBao Trong Do, Eric Mehnert, Nicholas D. McKay, Jr., Candace Branch, Jeffrey Sherwood
Life of this patent
Estimating the term…
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.
Claims18
A method of manufacturing a fragrance-releasing article, the article comprising a base material having fibers and pores, the method comprising:
- applying a volatile composition to the base material, wherein the volatile composition comprises components with at least one top note and at least one base note;
- wherein the at least one top note and the at least one base note comprises differing evaporation rates;
- wherein the evaporation rate of the at least one top note is higher than the evaporation rate of the at least one base note;
- applying a modulating coating to at least one outer surface of the base material, the modulating coating comprising a hygroscopic substance and a barrier substance dispersed therein;
- wherein the hygroscopic substance comprises hygroscopic silica nanoparticles having a diameter ranging from 1 nm to 100 nm;
- wherein the evaporation rate of the at least one top note is modulated by the barrier substance to achieve an initial release rate that is lower than an initial release rate of the at least one top note that would be achieved absent inclusion of the barrier substance;
- wherein the evaporation rate of the at least one base note is modulated by the hygroscopic substance to achieve a final release rate that is higher than a final release rate of the at least one base note that would be achieved absent inclusion of the hygroscopic substance;
- and
- wherein the fragrance-releasing 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 fragrance-releasing article.
A method of manufacturing a fragrance-releasing article, the article comprising a base material comprising a three-dimensional structure with an internal structure comprising a plurality of pores, the method comprising:
- applying a volatile composition to the base material, wherein the volatile composition comprises components with at least one top note and at least one base note;
- wherein the at least one top note and the at least one base note comprises differing evaporation rates;
- wherein the evaporation rate of the at least one top note is higher than the evaporation rate of the at least one base note;
- applying a modulating coating to at least one outer surface of the base material, the modulating coating comprising a hygroscopic substance and a barrier substance dispersed therein;
- wherein the hygroscopic substance comprises hygroscopic silica nanoparticles having a diameter ranging from 1 nm to 100 nm;
- wherein the evaporation rate of the at least one top note is modulated by the barrier substance to achieve an initial release rate that is lower than an initial release rate of the at least one top note that would be achieved absent inclusion of the barrier substance;
- wherein the evaporation rate of the at least one base note is modulated by the hygroscopic substance to achieve a final release rate that is higher than a final release rate of the at least one base note that would be achieved absent inclusion of the hygroscopic substance;
- and
- wherein the fragrance-releasing 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 fragrance-releasing article.
Dependencies are inferred from the claim text.