Rinse formulation cooling agent
A rinse formulation cooling agent is typically used in personal care products, such as shampoos, conditioners, or body washes, to provide a refreshing and cooling sensation on the skin or scalp. These agents are often derived from natural extracts or synthetic compounds that activate thermoreceptors in the skin, creating a cooling effect. Below is a general formulation outline for a cooling agent in a rinse-off product:
Key Ingredients:
- Base Product (e.g., Shampoo, Conditioner, Body Wash)
- Surfactants, emulsifiers, and other base ingredients specific to the product type.
- Cooling Agent
- Menthol: A common cooling agent derived from mint oils. Typical usage level: 0.1–0.5%.
- Menthyl Lactate: A derivative of menthol with a milder and longer-lasting cooling effect. Usage: 0.1–1%.
- Eucalyptus Oil: Provides a cooling sensation and a refreshing aroma. Usage: 0.1–0.3%.
- Peppermint Oil: Contains menthol and imparts a cooling and tingling sensation. Usage: 0.1–0.5%.
- WS-3 (N-Ethyl-p-menthane-3-carboxamide): A synthetic cooling agent with a strong cooling effect. Usage: 0.01–0.1%.
- WS-23 (Isopulegol derivative): Another synthetic cooling agent with a clean, intense cooling sensation. Usage: 0.01–0.1%.
- Solubilizers (if needed)
- For essential oils or hydrophobic cooling agents, use solubilizers like Polysorbate 20 or PEG-40 Hydrogenated Castor Oil.
- Preservatives
- To ensure product stability and safety. Examples: Phenoxyethanol, Benzyl Alcohol, or Parabens.
- Fragrance (optional)
- To enhance the sensory experience and complement the cooling effect.
- Water or Carrier
- Acts as the base for the formulation.
Sample Formulation (Cooling Body Wash):
| Ingredient | Percentage |
|---|---|
| Water | 70–80% |
| Surfactant (e.g., SLES) | 10–15% |
| Cocamidopropyl Betaine | 5–10% |
| Glycerin | 1–3% |
| Menthol | 0.1–0.3% |
| Peppermint Oil | 0.1–0.2% |
| Polysorbate 20 | 0.5–1% |
| Preservative | 0.5–1% |
| Fragrance | 0.1–0.3% |
Instructions:
- Mix water and surfactants in the main vessel.
- Add glycerin and solubilizers, stirring until homogeneous.
- Slowly incorporate the cooling agent (e.g., menthol or WS-3) and essential oils, ensuring proper dispersion.
- Add preservatives and fragrance.
- Adjust pH to 5.5–6.5 using citric acid or sodium hydroxide.
- Test for stability, cooling effect, and sensory properties.
Notes:
- Always perform a patch test to ensure the cooling agent does not cause irritation.
- Adjust the concentration of the cooling agent based on the desired intensity of the cooling sensation.
- Ensure compliance with regulatory guidelines for cosmetic ingredients in your region.
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