Surface Treatments

Introduction

Surface treatment of pigments and fillers is used to improve performance in a variety of cosmetic formulations. Surface coatings improve skin feel by smoothing the rough pigment surfaces and reducing oil adsorption. Treated pigments compress more easily, permitting formulation of pressed powders with lower binder content, further improving skin feel.

In addition to the deagglomeration achieved by the coating process alone, surface characteristics can be modified to optimize wetting in a variety of vehicles. Surfact treated pigments and fillers have permitted the development of new product forms, including cosmetically eleegant water in oil foundations, cream to powder cosmetics and powder to liquid formulation.

Surface treatments are applied by a variety of mechanisms:

Chemical Reactions - A permanent chemical bond is formed between the surface treatment molecule and the pigments surface, resuting in an insoluble, shear resistant coating. Chemically bonded treatments are recommended for use in aqueous and anhydrous dispersed systems.

AS - Alkyl Silane             D, D/I - Hydrophobics

PFD - Fluoropropyl Methicone                   SP - Surface Passivated

For more information click on the Chemical Reactions tab on the left

Precipitation - The treating compound is either precipitated by the pigment surface or is precipitated by addition of a polyvalent metal ion, formin a continuous, hydrophobic coating.

Precipitated coatings are tenacious buy may be dissolved from the pigment surface during prolonged heating in oil.

MM - Magnesium Myristate                HSE - Herbal Skin Enhancer

For more information click on the Presipitation tab on the left

Adsorption - Molecules can be adsorbed onto the surface of pigments or fillers, resulting in a shear resistant coating.

GA - Hydrophilics                 NHE - Natural Humectant Enhanced

For more information click on the Adsorption tab on the left

Electrostatic - Under conditions of high shear, small particles are adhered to the surface of the larger pigment or fillers.

LL - Lauroyl Lysine

For more information click on the Electrostatic tab on the left

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