Additive releasing materials
AssigneeBritish American Tobacco (Investments) Limited
InventorPeter BRANTON
Life of this patent
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Abstract
The invention relates to an additive releasing material comprising a carrier material having on its surface one or more additives, the additive releasing material having a desorption temperature selected to allow controlled temperature-dependent release of the additive(s). The invention further relates to filters and smoking articles including such additive releasing materials, and to methods for preparing the additive releasing materials.
Claims21
An additive releasing material comprising a carrier material having on its surface one or more additives, the additive releasing material having a desorption temperature selected to allow controlled temperature-dependent release of the additive(s).
A material as claimed in either of the preceding claims, wherein the additive releasing material releases the additive(s) by desorption when the material is exposed to a temperature within a predetermined threshold range.
A material as claimed in any one of the preceding claims, wherein the additive releasing material does not release the additive(s) until the material is exposed to a temperature within a predetermined threshold temperature range.
A material as claimed in any one of the preceding claims, wherein the additive releasing material has a desorption temperature of at least about 35° C.
A material as claimed in any one of the preceding claims, wherein the carrier is a porous material.
A material as claimed in any one of the preceding claims, wherein the desorption temperature of the additive releasing material is from about 45° C., about 55° C., about 60° C. or about 65° C., and up to about 60° C., about 65° C. or about 70° C.
A material as claimed in any one of the preceding claims, wherein the material is for use in a smoking article.
A material as claimed in claim ii, wherein the additive releasing material has a desorption temperature such that the additive(s) is (are) released at a predetermined point during the use of the smoking article.
A method for preparing an additive releasing material comprising applying one or more additives to the surface of a carrier, wherein the additive(s) and/or the carrier and/or the amount of additive(s) are selected to provide the additive releasing material with a desired desorption temperature selected allow controlled temperature-dependent release of the additive(s).
Dependencies are inferred from the claim text.