Non-migrating colorants in multi-phase personal cleansing compositions

Abstract

A multi-phase personal cleansing composition comprising: (a) a structured aqueous cleansing phase comprising a surfactant and water; and (b) at least one additional, non-lamellar aqueous phase; wherein at least one of said structured aqueous cleansing phase and said additional aqueous phase comprises at least one non-migrating colorant, said non-migrating colorant comprising a cLogP value of at least about 2; and wherein said structured aqueous cleansing phase and said additional aqueous phase are packaged in physical contact with one another.

Description

FIELD OF THE INVENTION [0001] The present invention relates to multi-phase personal cleansing compositions comprising at least one structured aqueous cleansing phase and at least one additional, non-lamellar aqueous phase wherein at least one of the phases comprises at least one non-migrating colorant comprising a cLogP value of at least about 2 and wherein the two phases are packaged in physical contact with one another while remaining stable over time. BACKGROUND OF THE INVENTION [0002] The ability to place a cleansing phase in physical contact with a structured aqueous phase and maintain stability for any period of time has proven to be a problem. The physical contact of a structured aqueous phase and a cleansing phase creates a situation where they are thermodynamically unstable. [0003] One attempt at providing a stable, structured aqueous phase and cleansing phase within a personal cleansing product would be the use of dual-chamber packaging. These packages comprise separate cl...

AI Technical Summary

Benefits of technology

[0005] The present invention relates to a multi-phase personal cleansing compositions comprising a structured aqueous cleansing phase and at least one aqueous phase wherein at least one phase comprises a non-migrating colorant. The phases are packaged in physical contact with one another. It has been found that the use of a non-migrating colorant comprising a cLogP value of at least about 2 provides improved color stability within the product by preventing migration of the colorant between the phases.

Problems solved by technology

The ability to place a cleansing phase in physical contact with a structured aqueous phase and maintain stability for any period of time has proven to be a problem.

The physical contact of a structured aqueous phase and a cleansing phase creates a situation where they are thermodynamically unstable.

Although such dual-chamber delivery systems provide improved cleansing benefits versus conventional systems, it is often difficult to achieve consistent and uniform performance because of the uneven dispensing ratio between the cleansing phase and the structured aqueous phase.

Additionally, these packaging systems add considerable cost to the finished product.

It has, however, been found that when the compositions of the two phases are chemically distinct, as described herein, color migration of certain commonly used colorants will serve to render multi-phase compositions less visibly distinct which, may decrease their appeal.

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