Patent ID: 7351749

Claim:
A process for manufacture of personal care compositions comprising: (i) separately feeding a first water phase which is a concentrate comprising more than 15% by weight of the first water phase of ingredients other than water and having a viscosity from about 50 to about 30,000 cps into a blending tube of a sonic mixer; (ii) separately feeding a second phase into the blending tube, the first phase entering the blending tube being at least 10° F. lower in temperature than that of the second phase entering the blending tube; (iii) separately feeding a third phase comprising no more than 2% by weight of the third phase of ingredients other than water having a viscosity of less than 30 cps into the blending tube, the third phase being at least about 15% of the composition; (iv) sonically mixing together all three of the phases, in the blending tube as a liquid stream at a pressure from about 10 to about 5,000 psi and at a flow rate of about 5 to about 5,000 pounds per minute, steps (i) through (iv) being performed in a continuous manner; and (v) recovering a resultant mixture as a personal care composition.