Pigment dispersion and related method of manufacture

Details Pigment dispersion and related method of manufacture Pigment dispersion and related method of manufacture

2006-08-22

2006-08-22

Webman, Edward J. (Department: 1616)

Drug, bio-affecting and body treating compositions

Live skin colorant containing

C424S064000, C424S400000, C514S937000, C514S938000, C514S939000, C514S943000, C516S053000, C516S075000, C516S928000

Reexamination Certificate

active

07094395

ABSTRACT:
A method for producing a colored cosmetic composition having inorganic pigments resistant to agglomeration in an oil-in-water emulsion. The method includes the following: preparing an oil dispersion by adding inorganic pigments directly to an oil; preparing an aqueous base that includes water; combining the oil dispersion and aqueous base; and partitioning the inorganic pigments between the oil and the aqueous phase under controlled conditions, for example, hydrophile-lipophile balance, agitation time and speed, and cooling rate. The present invention provides a process to easily disperse iron-oxide pigments, even black iron-oxide pigments, in oil-in-water emulsions. The present invention provides colored cosmetic compositions that have excellent properties, such as smoothness, adhesion to skin, uniform color, ease of removal, smudge resistance and non-oiliness.

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