Lauryl Polyglyceryl-3 Dimethicone is a sophisticated silicone emulsifier designed to stabilize water-in-oil and water-in-silicone formulations. This branched polymer excels at creating lightweight, silky textures while allowing for high water concentrations in anhydrous-feeling products.
- INCI Name:
- Lauryl Polyglyceryl-3 Dimethicone
- Chemical/Scientific Name:
- D-Glucitol, 1-O-[3-[1,3,3,3-tetramethyl-1-[(trimethylsilyl)oxy]-1-disiloxanyl]propyl]-, polymer with 1,2,3-propanetriol and 1-bromododecane
- Common Aliases:
- Alkyl-modified polyglyceryl silicone, Lauryl-modified dimethicone copolyol
| Category: | Emulsifiers |
| Source Origin: | Synthetic |
| Comedogenic Rating: | 0 |
| Primary Industries: | Dermatological Skincare, Sun Protection, Color Cosmetics |
| Solubility: | Oil and Silicone Soluble |
At a Glance: Properties & Effects
| Texture Enhancement: | |
| Formula Stability: | |
| Penetration Enhancement: | |
| Irritation Risk: |
- Primary Benefits:
- Facilitates stable emulsions containing high percentages of water and electrolytes.
- Improves the dispersibility of mineral pigments and sunscreens.
- Provides a non-greasy, elegant skin feel with superior spreadability.
- Enables “cold process” manufacturing, preserving heat-sensitive active ingredients.
- Potential Risks:
- Minimal risk of irritation; generally considered inert on the skin surface.
- Requires specialized oil-phase blending, which may complicate simple DIY formulations.
Biological Action & Cosmetic Profile
The molecular architecture of this ingredient allows it to bridge the gap between incompatible phases. Its Dimethicone backbone provides the characteristic “slip” associated with premium skincare, while the attached lauryl chains ensure it remains anchored within organic oils. Unlike traditional PEG-based emulsifiers, the polyglyceryl-3 moiety offers a more “green” hydrophilic head that maintains stability without the potential for oxidative byproducts often found in older polyether surfactants.Stability in complex systems is a hallmark of this branched silicone. By forming a robust interfacial film around water droplets, it prevents coalescence, even in formulas with high concentrations of salts or acidic actives. This resistance to electrolyte-induced “crashing” makes it a preferred choice for clinical-grade sunscreens and foundations that utilize Zinc Oxide or Titanium Dioxide.Sensory attributes are significantly enhanced when this polymer is present. It reduces the “tackiness” typically associated with high-glycerin formulas. Upon application, the emulsion breaks quickly on the skin, delivering a refreshing burst of moisture while leaving behind a protective, breathable barrier that limits transepidermal water loss.
Broader Applications & Origins
Chemical synthesis of this ingredient involves a hydrosilylation process where polyglyceryl and alkyl groups are grafted onto a siloxane chain. This modification transforms a standard silicone into a versatile surfactant capable of emulsifying diverse lipids, ranging from Isododecane to natural esters like Caprylic/capric Triglyceride.Beyond basic emulsification, the polymer serves as a pigment wetting agent. In color cosmetics, it prevents the agglomeration of iron oxides, ensuring uniform color payoff and preventing “streaking” over time. This property is equally valuable in physical sunscreens, where uniform particle distribution is essential for achieving the labeled SPF rating.
Routine Integration
- Synergies:
- Mineral Filters: Enhances the suspension of Zinc Oxide and Titanium Dioxide for better UV protection.
- Humectants: Works well with Glycerin and Sodium Hyaluronate to lock in moisture.
- Emollients: Pairs effectively with Squalane to create a reinforced lipid barrier.
Clinical Consensus & Safety
The Cosmetic Ingredient Review (CIR) Expert Panel has evaluated alkyl polyglyceryl silicones and concluded they are safe for use in cosmetic products. Due to their high molecular weight, these molecules do not penetrate the stratum corneum, remaining on the surface where they perform their film-forming and emulsifying functions. Dermatological testing typically shows negligible primary irritation or sensitization. European regulatory bodies (CosIng) list no specific concentration restrictions, further affirming its safety profile for general topical use.
Is Lauryl Polyglyceryl-3 Dimethicone a “bad” silicone?
No, it is considered a high-performance, skin-friendly silicone. It is non-comedogenic and does not “suffocate” the skin; rather, it creates a breathable film that helps maintain hydration while improving the aesthetic feel of heavy sunscreens or creams.
Can this ingredient cause breakouts?
This specific silicone has a comedogenic rating of 0. It is chemically inert and does not typically clog pores. If a product containing this ingredient causes breakouts, it is more likely due to other components in the oil phase or improper cleansing at the end of the day.
Why is it used instead of traditional emulsifiers?
Manufacturers choose it for its ability to create “water-in-silicone” emulsions which are more water-resistant and have a more sophisticated, “primer-like” finish compared to standard “oil-in-water” creams.