Silicone Cream Formulation: Emulsification and Stability Feedback
Question
I am developing a silicone cream and would like feedback on my formula and manufacturing steps, particularly regarding emulsification and stability. My formula structure is as follows:
- Part A: Water-soluble ingredients (Water, Calendula Extract, Apple Stem Cell Extract)
- Part B: Silicone base (Cyclomethicone, Silicone Gel Base, Warp Cream Maker)
- Part C: Oil phase (LipidSoft, Activated Resorcinol, Fractionated Coconut Oil, Light Cream Maker)
- Part D: Preservative, Fragrance (Phenoxyethanol, Fragrance Oil)
I am using both Warp Cream Maker and Light Cream Maker to emulsify the oil/silicone phase with the water phase. I am concerned about the stability of the emulsion, especially considering the water percentage I plan to use. Could you please advise if using both emulsifiers is appropriate and review my general manufacturing steps for this type of formulation?
Answer
Silicone Cream Formulation Feedback
Okay, I have reviewed your silicone cream formulation and the feedback you received.
Based on the discussion, particularly the advice from C7, here is a summary and the suggested adjustments to your formula and method:
Regarding your question about using both Warp Cream Maker and Light Cream Maker to emulsify the oil phase, C7 suggested that if the water content is below 50%, using only Warp Cream Maker should be sufficient for stability. The revised formula reflects this by removing the Light Cream Maker.
The suggested revised formula aims for better stability by reducing the water content and increasing the silicone phase:
Revised Formula (Suggested by C7):
- Part A
- Water: 32%
- Calendula Extract: 5%
- Apple Stem Cell Extract: 3%
- Part B
- Cyclomethicone: 30%
- Silicone Gel Base: 4%
- Warp Cream Maker: 4%
- Part C
- LipidSoft: 10%
- Activated Resorcinol: 1%
- Fractionated Coconut Oil: 10%
- Part D
- Phenoxyethanol: 0.5%
- Fragrance Oil: 0.5%
Total: 100%
C7 also noted that while Fractionated Coconut Oil is light, its presence might slightly reduce the characteristic non-greasy, light feel expected from a silicone-based cream compared to a formula with only silicones in the oil phase. However, the final texture preference is personal.
The manufacturing steps you outlined are generally correct. The key adjustment, as pointed out, is in step 5:
Revised Manufacturing Steps:
- Combine Part A ingredients (Water, Calendula Extract, Apple Stem Cell Extract).
- Combine Part B ingredients (Cyclomethicone, Silicone Gel Base, Warp Cream Maker). Heating to around 70°C as you originally planned is acceptable if needed for solubility or processing, but for silicones and emulsifiers like Warp Cream Maker, often gentle mixing at room temperature or slightly warmed is sufficient. Check the specific instructions for your Silicone Gel Base and Warp Cream Maker.
- Combine Part C ingredients (LipidSoft, Activated Resorcinol, Fractionated Coconut Oil, Light Cream Maker - Note: In the revised formula, Light Cream Maker is removed from this part). Dissolve Activated Resorcinol in LipidSoft first, then add Fractionated Coconut Oil.
- Combine Part B and Part C mixtures.
- Gradually add Part A (water phase) to the combined B and C mixture while stirring continuously. Add the water in small portions, allowing the cream to form and thicken before adding more. Adding all the water at once can make emulsification difficult.
- Once the cream texture is formed and all of Part A is incorporated, add Part D ingredients (Phenoxyethanol, Fragrance Oil) and mix until homogenous.
This revised approach, particularly the lower water percentage and gradual addition of the water phase, should help in achieving a stable silicone cream texture using primarily Warp Cream Maker.
Here are some of the products mentioned:
- Cyclopentasiloxane (Low-Odor Cyclomethicone)
- Silicone Gel (Thick & Smooth, Cyclopentasiloxane Base)
- Silicone Gel 9040 (e.q. DC 9040, Cyclopentasiloxane Base)
- Warp Cream Maker™ (e.q. Nikkomulese wo)
- Light Cream Maker™
- LipidSoft™ C1215
- LipidSoft™ Lite
- LipidSoft™ D5 (Cyclomethicone Replacer)
- Activated Resorcinol™ (4-Butyl Resorcinol)
- Fractionated Coconut Oil
- Phenoxyethanol (Extra Pure)
- Fragrance Oil (e.g., Strawberry, Cherry, Jasmine)
- Calendula Extract (Water Soluble)
- Apple Stem Cell Extract (AppleCell™ Powder)
Related Products Mentioned
Calendula Extract (Water Soluble)
Light Cream Maker™
Phenoxyethanol (Extra Pure)
Fractionated Coconut Oil
Warp Cream Maker™ (e.q. Nikkomulese wo)
LipidSoft™ Lite (Isononyl Isononanoate)
Strawberry (Fragrance Oil)
Cherry (Fragrance Oil)
Jasmine Fragrance Oil