US 8,475,769 B2Granted

Aerosol composition with enhanced dispersion effects

AssigneeS.C. Johnson & Son, Inc.

InventorsPeter N. Nguyen, John R. Wietfeldt, Yemi Susan Bullen, Francis J. Randall, Randy C. Yuhas

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Abstract

A stable, high VOC, single phase, non-aqueous liquid aerosol composition having enhanced dispersion based on reduced particle size and increased evaporation rate to result in improved active ingredient dispersion, slower settling in air and less residue on surfaces. The composition includes at least one hydrocarbon propellant, at least one active ingredient and a solvent blend. The solvent blend includes at least one low volatility solvent and at least one high volatility solvent wherein each has a defined vapor pressure and Hansen solubility parameter. The composition upon dispersion as a spray has an aerosol particle size of less than 30 microns.

Claims17

Dependent claims

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.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/801,792Filed 25 Jun 2010
Published: US 2011/0318276 A129 Dec 2011
Granted: 2 Jul 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

A61K 9/124
Aerosols; Foams: characterised by the propellant
A01N 25/06
Dispersions, emulsions, suspoemulsions, suspension concentrates or gels: aerosols
A61L 9/01
Disinfection, sterilisation or deodorisation of air: deodorant compositions
A61L 9/14
Disinfection, sterilisation or deodorisation of air: using sprayed or atomised substances including air-liquid contact processes