Patent ID: 8475769

Claim:
A stable single phase liquid aerosol composition for dispersion of an active ingredient into air comprising (a) about 20 to about 70 wt. % of at least one hydrocarbon propellant; (b) about 0.001 to about 10 wt. % of at least one active ingredient; and (c) a balance of a solvent blend including (i) at least one low volatility solvent having a vapor pressure in a range of from about 0.01 to about 20 mm/Hg at 20° C.; (ii) at least one high volatility solvent having a vapor pressure in a range greater than 45 mm/Hg at 20° C.; and (iii) optionally, one or more coupling solvents; wherein the total composition is equal to 100 wt. % and is essentially absent of water; wherein the composition has a particle size of less than 30 microns based on formulation of said composition and not by physical structure of an actuator by which the composition is dispensed; wherein each component of said solvent blend has a Hansen Solubility Parameter distance (Ra) between any two solvents where as (1) between each solvent of (i) and each solvent of (ii), the Ra is below 20, and (2) when said one or more coupling solvents are present, the difference between each solvent of (i) and each solvent of (ii) is a Ra either above or below 20, and then each solvent of (ii) and each solvent of (iii) have a difference in Ra below 20, and between each solvent of (i) and each solvent of (iii) the difference in Ra is below 20; and wherein the composition before addition of said propellant, which includes said at least one active ingredient and said solvent blend, has an average evaporation rate for a first 20 wt. % of said composition of greater than 0.03 mg/min. and has an initial evaporation rate for a first 5 wt. % or more of the composition of greater than 0.05 mg/min measured at 50° C.