Patent ID: 11944697
Assignee: HENKEL AG & CO. KGAA
Field: Pharmaceuticals (Chemistry)
Classification: CPC A | IPC A

Claim 16:
17. A process for the preparation of a hair treatment composition in the form of a two-phase system having two separate, optically detectable continuous phases with a common horizontal phase boundary, comprising the following process steps:
a) Providing a water phase (Ia) comprising water and optionally other components and heating the water phase to a temperature of from about 80 to about 90° C.,
b) Providing an oil phase (Ib) comprising a silicone in a proportion by weight of at least 50% of the total weight of the oil phase (Ib), wherein the silicone is selected from cyclic siloxanes, polyarylsiloxanes, hydroxyl-substituted polysiloxanes, or combinations thereof, and adding the oil phase to the heated water phase from step a),
c) Homogenizing the mixture from step b) with a high shear mixer at a temperature in the range of from about 70 to about 80° C.,
d) Cooling the emulsion resulting from step c) to a temperature of from about 37 to about 43° C. and optionally adding further active ingredients,
e) Cooling the emulsion resulting from step d) and filling into transparent containers, whereby in the resting state after a maximum of 45 minutes a separation into a water phase (II) and an emulsion phase (IIb) occurs.