Description

Polyglyceryl-3 Distearate is a specialized cosmetic ingredient widely used as an emulsifier and skin conditioner in various skincare and makeup products. It is synthesized by the esterification of polyglycerin-3 with stearic acid, resulting in an ester known as 1,2,3-Propanetriol, homopolymer, octadecanoates in a 1:2 molar ratio with an average of 2 moles of glycerol. This ingredient is prized for its ability to enhance the stability and texture of cosmetic emulsions and deliver moisturizing properties.

Chemical Composition and Structure

This ester effectively combines the hydrating benefits of polyglycerin-3, a polymer of glycerol known for its moisturizing and humectant properties, with the emollient properties of stearic acid, a saturated fatty acid. The diester configuration helps in stabilizing oil-in-water emulsions, enhancing product consistency and improving skin feel.

Physical Properties

Polyglyceryl-3 Distearate typically appears as a creamy, white to off-white solid at room temperature. It is highly soluble in oils and has limited solubility in water, making it particularly effective in cosmetic formulations that aim for a rich, luxurious feel.

Production Process

Synthesis: The synthesis of Polyglyceryl-3 Distearate involves the controlled esterification of polyglycerin-3 with stearic acid to achieve a specific molar ratio. This process requires meticulous temperature and pH control to ensure efficient ester linkage and high-quality ester production.
Purification: Following synthesis, the product undergoes various purification processes to remove any unreacted materials and impurities, ensuring high purity suitable for cosmetic use.
Quality Control: Rigorous testing is conducted on the final product to ensure its purity, stability, and effectiveness in cosmetic formulations. These tests often include viscosity measurements, stability testing under different conditions, and performance evaluations in emulsion systems.

Applications

Cosmetic Products: Extensively used in creams, lotions, and body butters where it acts as an effective emulsifier, helping to mix and stabilize the oil and water components, thereby improving the consistency and sensory properties of the product.
Skin Care: Ideal for use in formulations aimed at dry or sensitive skin, as it helps to deeply moisturize and condition the skin while forming a protective barrier.
Makeup: Employed in foundations and concealers to enhance their texture and prolong wear, providing a smooth and even coverage.

Environmental and Safety Considerations

Polyglyceryl-3 Distearate is considered safe for use in cosmetic products and is generally well-tolerated by the skin. It is non-irritating and suitable for all skin types, including sensitive skin. As it is derived from naturally occurring fatty acids, it is also viewed as an environmentally friendly ingredient. Proper use within recommended concentrations is crucial to ensure safety and optimal effectiveness.

INCI


Surfactant - Emulsifying agent. Emulsions are thermodynamically unstable and are used to soothe or soften the skin and emulsify, so they need a specific, stabilising ingredient. This ingredient forms a film, lowers the surface tension and makes two immiscible liquids miscible. A very important factor affecting the stability of the emulsion is the amount of the emulsifying agent. Emulsifiers have the property of reducing the oil/water or water/oil interfacial tension, improving the stability of the emulsion and also directly influencing the stability, sensory properties and surface tension of sunscreens by modulating the filmometric performance.
Synonyms:

CAS: 9009-32-9 94423-19-5