Patent ID: 8716214

Claim:
A method of preparing a solid lipid nanoparticle (SLN) dispersion for the targeted release of fragrances and/or aromas, the method comprising the steps of: a) mixing the fragrance and/or aroma with the lipid-based active ingredient carrier and at least one emulsifier, which leads, in stage b), to the formation of a lyotropic lamellar liquid-crystalline mixed phase, at a temperature above the melting or softening point of the active ingredient carrier, to form a phase B, b) mechanical mixing, without high-pressure homogenization, of the phase B with an aqueous phase or polyol phase A at a temperature that is above the melting or softening point of the active ingredient carrier and is up to 70 degrees Celsius, where the weight ratio of phase B to phase A is 1:5 to 5:1 to form a lyotropic lamellar liquid-crystalline mixed phase, c) diluting the mixed phase with an aqueous phase or polyol phase at a temperature of the aqueous phase or polyol phase below the melting or softening point of the active ingredient carrier by stirring without high-pressure homogenization to produce a desired end concentration of the dispersion, the dispersion containing lipid-based nanoparticles stabilized by an emulsifier monolayer or one or more membrane layers, the fragrances and/or aromas being included in the nanoparticles and/or in the emulsifier monolayer or the membrane layers and the dispersion being free of fragrance and/or aroma droplets.