Patent ID: 8828370

Claim:
A method of manufacturing a hair conditioning composition, wherein the composition comprises a cationic selected from the group consisting of behenyl trimethyl ammonium chloride and stearyl trimethyl ammonium chloride surfactant, fatty alcohol selected from the group consisting of stearyl alcohol, cetyl alcohol, behenyl alcohol and mixtures thereof and an aqueous carrier; wherein a total amount of the cationic surfactant and the high melting point fatty compound is from about 7.0% to about 15% by weight of the composition; wherein the method comprises the steps: (1) preparing a premix (oil phase) comprising the cationic surfactants and the high melting point fatty compounds, wherein the temperature of the premix is higher than a melting point of the high melting point fatty compounds; and (2) preparing an aqueous carrier (aqueous phase), wherein the temperature of the aqueous carrier is below the melting point of the high melting point fatty compounds; and (3) mixing the premix with the aqueous carrier and forming a gel matrix; wherein the mixing step (3) comprises the steps: (3-1) feeding either of the oil phase or the aqueous phase into a high shear field having an energy density of about 1.0×10 2 J/m 3 or more; (3-2) feeding the other phase directly to the field; and (3-3) forming an emulsion wherein the premix has a temperature of from about 65° C. to about 95° C. when mixing it with the aqueous carrier wherein the aqueous carrier has a temperature of from about 10° C. to about 52° C.; when mixing it with the premix wherein the temperature of the aqueous phase, when mixing it with the premix is at least about 5° C. lower than the temperature of the premix wherein the temperature of the aqueous carrier, when mixing it with the premix, is from about 2° C. to about 60° C. lower than the melting point of the high melting point fatty compounds; and wherein the premix and the aqueous carrier are mixed by a high shear homogenizer wherein the hair conditioning composition comprises less than 0.1% dialkyl cationic surfactants, by weight of the composition and wherein the oil phase is substantially free of water and wherein the premix is injected to a high shear field having an energy density of from about 1.0×10 4 J/m 3 to about 1.0×10 7 J/m 3 using a direct injection rotor-stator homogenizer where the water is already present.