Patent ID: 8191796

Claim:
A passive fragrance dispenser for simultaneously presenting HVA (high volatility accord) and LVA (low volatility accord) fragrances, comprising a first and a second carrier, each carrier comprising one or more fragrance substances, wherein the fragrance substances comprise one or more fragrance substances a) with a vapor pressure of at least 0.1 mm Hg at 25 ° C. (“HVA”) and one or more fragrance substances b) with a vapor pressure of less than 0.1 mm Hg at 25 ° C. (“LVA”), and wherein the fragrance substances are distributed to the first and second carrier such that at least 80 wt. % of all HVA fragrance substances are carried by the first carrier, and wherein the first carrier is covered by a diffusion barrier having a benzyl acetate vapour transmission rate of more than 0.02 and less than 1 g/(5 cm 2 ·24 h) at 25° C., and wherein the second carrier remains free of a diffusion barrier, further wherein the first and second carrier are separated from one another such that the total weight of LVA substances in the first carrier does not increase by more than 35 wt. % relative to the LVA content of the first carrier within 30 days after producing the fragrance dispenser.