Description

Polyglyceryl-3 Dicitrate/Stearate is a cosmetic ingredient used primarily as an emulsifier and stabilizer in skincare and personal care products. It is the diester formed by the reaction of polyglycerin-3 with a mixture of citric acid and stearic acid. This ingredient is appreciated for its ability to enhance the texture and stability of cosmetic formulations, while also providing skin-conditioning benefits.

Chemical Composition and Structure

This compound combines the hydrating and emulsifying properties of polyglycerin-3 with the unique characteristics of citric acid and stearic acid. Citric acid, a natural preservative and pH adjuster, contributes to the antioxidant properties, while stearic acid, a long-chain fatty acid, provides emollience and improves product viscosity. The diester formation results in a molecule that enhances the performance of cosmetic emulsions by improving their stability and feel on the skin.

Physical Properties

Polyglyceryl-3 Dicitrate/Stearate typically appears as a waxy solid or viscous paste at room temperature. It is soluble in oils and can be dispersed in water, which makes it particularly effective in oil-in-water emulsions and other water-based cosmetic products.

Production Process

Synthesis: The diester is synthesized through the esterification of polyglycerin-3 with mixed fatty acids from citric and stearic acids. This process often involves the use of a catalyst under controlled temperature conditions to ensure efficient ester bond formation.
Purification: After synthesis, the product undergoes purification to remove any unreacted materials and by-products. This step might involve techniques such as filtration or centrifugation.
Quality Control: The final product is subjected to various tests to ensure its purity, efficacy, and compatibility with cosmetic formulations. These tests might include performance evaluations in emulsion systems, stability testing, and safety assessments.

Applications

Cosmetic Products: Used in a variety of products including lotions, creams, sunscreens, and makeup, where it functions as an effective emulsifier to blend oil and water phases, improving product consistency and sensory properties.
Skin Care: It is particularly valuable in moisturizing and anti-aging formulations, where it helps to enhance skin feel and maintain hydration.
Hair Care: Can also be used in conditioners and hair styling products to improve texture and manageability without weighing down the hair.

Environmental and Safety Considerations

Polyglyceryl-3 Dicitrate/Stearate is considered safe for use in cosmetic products and is generally well-tolerated by the skin. It is derived from renewable resources, making it a more environmentally sustainable choice. Proper use within recommended concentrations is essential to ensure product safety and avoid potential sensitivities.

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.

Surfactant - Cleansing agent. Cosmetic products used to cleanse the skin utilise the surface-active action that produces a lowering of the surface tension of the stratum corneum, facilitating the removal of dirt and impurities.
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