Beth Johnson – Dow Corning Corporation, USA Stephane Van Oycke – Dow Corning S.A., Belgium
Over the past decade, the global hair care market has evolved rapidly as competition increases and formulators strive to meet specialised regional needs.
Despite the broad use of silicones, maximising their conditioning benefits continues to be an area of investigation. In addition, precise knowledge of the amount of silicone deposited on hair following treatment with a conditioning formulation is an important tool for the formulator, allowing practical correlation between product composition and sensory evaluation results. This information can also help screen ingredients to speed product development.
The first step in optimising silicone deposition is to determine how broadly the deposition mechanism can be applied to several different types of polyquaternium materials and silicones, as well as any synergies that exist in terms of conditioning performance.
The variables investigated included composition, viscosity and charge density of the polyquaternium materials and internal phase viscosity and surfactant type for the silicone emulsions.
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