Silicone Oil: Basics

Silicon oil used in foam formulations acts as a surfactant. In the foaming process the surfactant plays the following rolls:

• Emulsifies otherwise incompatible ingredients, brings about homogeneity of the chemical mix

• Lowers the bulk surface tension
• Enhances formulation of cells (and bubbles) during the initial mixing stage.

• Prevents cell collapse during the rising stage.

• Aids introduction of solids (e.g. calcium carbonate) into foam formulation.

It should be appreciated that for any given foam formulation, a minimum level of silicone oil is required to have a well structured foam.

Silicone oil is a light-colored and moderately viscous liquid.