Process for producing small droplet emulsions at low pressure

A process for making a nanoemulsion composition comprising:

• a) an internal phase comprising (i) 55 to 75% by wt. of total nanoemulsion composition of oils selected from the group consisting of triglyceride, petrolatum and mixtures thereof, wherein the melting point of the petrolatum is 30 to 60° C.;
• and (ii) 1.1 to 8% by wt. nanoemulsion of a C8 to C18 fatty acid;
• and
• b) an external aqueous phase comprising 2 to 15% by wt. of total nanoemulsion composition of a surfactant or surfactants which are N-acyl derivatives of amino acid salt;
• wherein the surfactant of (b) comprises 50% or greater of all surfactant present in said external aqueous phase;
• wherein the volume average diameter of droplets of (a) is 20 to 600 nanometers,
• wherein said process comprises:
• 1) adding the C8 to C18 fatty acid of component (a)(ii) to oil of (a)(i);
• 2) heating oil phase (a) to a sufficient temperature so that all compounds are molten;
• and
• 3) Heating the aqueous phase to a temperature range of 45 to 75° C.;
• and
• 4) Simultaneously pumping the heated aqueous and oil phases via a sonolator or a conventional homogenizer using process pressure of 500 pounds per square inch (psi) or less.