Patent ID: 7745497
Filing Date: 2010-06-29
Classification: C09K

Abstract:
1. A method of enhancing the unipolar charge which is imparted to droplets of an emulsion on discharge from an aerosol spray device, the method comprising forming the droplets from an oil-in-water or a water-in-oil emulsion composition which comprises: (a) at least one propellant in an amount of about 10% to about 60% w/w, (b) at least one non-ionic alkoxylated alcohol surfactant in an amount of from about 0.01 to about 1.0% w/w, (c) optionally at least one solvent within an oil phase of the emulsion in an amount of up to about 20% w/w, said solvent being selected from the group consisting of n-paraffins and isoparaffins, (d) a component in an amount of from about 0.01 to about 10% w/w of the non-ionic surfactant present in the composition, said component being selected from the group consisting of benzalkonium chloride, sodium laureth sulphate and oleic acid in an amount such that a theoretical conductivity of the emulsion is less than a bulk conductivity of the emulsion and the difference is at least about 0.5 μS cm (e) water.