Ingredient Usage and Formulation Questions: Thickening, Sunscreen, and Soy Genistein for Eye Area

Question

I have some questions regarding ingredients and formulation: I like the thick, non-drying texture of Dimethicone and Silicone Blend. However, I don't want to use silicone to create this thick texture. I want to use Microcrystalline Wax instead. Can it dissolve in silicones like Dimethicone or Silicone Blend? Will it work to thicken them? Can physical sunscreen be applied under the eyes? Can Soy Genistein be applied under the eyes?

MySkinRecipes Expert · Accepted Answer

Formulation Questions Answered

Here are the answers to your questions regarding formulation ingredients and usage:

1. Using Microcrystalline Wax to Thicken Silicones

Based on the properties of the ingredients, Microcrystalline Wax is typically soluble in oils, not silicones like Dimethicone or Silicone Blend. Therefore, you cannot directly use Microcrystalline Wax to thicken silicones and achieve a clear, smooth texture without the use of a suitable coupling agent or emulsifier to bridge the oil-soluble wax and the silicone phase. As mentioned by the staff, a coupling agent is necessary for this purpose. They also noted that Silicone Wax, which is compatible with silicones, might be a suitable alternative for thickening silicone-based formulas and is being considered for import.

2. Applying Physical Sunscreen Under Eyes

Yes, physical sunscreen can be applied under the eyes. However, it is important to apply it carefully and avoid getting it directly into your eyes. This is especially true for EasyDisperse types, which can adhere tightly to the skin and be difficult to remove if they get into the eye area.