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.
Claims19
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;
- 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 silica particles that are sized to attract water vapor without attracting liquid water;
- subjecting the combination of the base material, the modulating coating, and the volatile composition to a pressure that is different from atmospheric pressure;
- 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 rod-shaped structural component comprising a base material wound around a vertical axis, the base material having fibers and pores, the method comprising:
- applying a volatile composition to the base material;
- 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 silica particles that are sized to attract water vapor without attracting liquid water;
- subjecting the combination of the base material, the modulating coating, and the volatile composition to a pressure that is different from atmospheric pressure;
- 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.