Description

Polyglyceryl-3 Stearate SE is a widely used cosmetic ingredient functioning primarily as an emulsifier and skin conditioner in various skincare and cosmetic products. This compound is formed by the reaction products of polyglycerin-3 and octadecanoic (stearic) acid, which are then neutralized to achieve a stable and functional structure. It is valued for its ability to enhance emulsion stability and provide moisturizing and conditioning properties.

Chemical Composition and Structure

Polyglyceryl-3 Stearate SE is composed of polyglycerin-3, a polymer derived from glycerol known for its excellent moisture-retention capabilities, and stearic acid, a saturated fatty acid that acts as an emollient and thickening agent. The reaction between these components produces a polyglyceryl ester that is subsequently neutralized to improve the solubility and stability of the compound. The average molar ratio is 3 mol of glycerol.

Physical Properties

Polyglyceryl-3 Stearate SE typically appears as a waxy solid or a viscous liquid at room temperature, depending on the specific formulation. It is soluble in oils and has limited water solubility, making it ideal for use in oil-in-water and water-in-oil emulsions, contributing to a rich, non-greasy texture.

Production Process

Synthesis: The production of Polyglyceryl-3 Stearate SE involves the reaction of polyglycerin-3 with stearic acid. This reaction is carefully controlled to ensure the formation of a stable and effective ester.
Neutralization: After the reaction, the product is neutralized to improve the solubility and stability of the compound, making it more suitable for cosmetic formulations.
Purification: Following synthesis and neutralization, the product undergoes purification to remove any unreacted materials and by-products, ensuring its purity and suitability for cosmetic use.
Quality Control: Rigorous testing is conducted on the final product to assess its purity, consistency, and performance in various cosmetic formulations. These tests typically include evaluations of viscosity, emulsion stability, and compatibility with other cosmetic ingredients.

Applications

Cosmetic Products: Widely used in creams, lotions, and serums where it acts as an effective emulsifier, helping to stabilize the mixture of oil and water components, improving the product's texture and providing moisturizing benefits.
Skin Care: Ideal for use in moisturizing and nourishing products, enhancing skin softness and hydration due to its emollient properties.
Makeup: Employed in foundations and concealers to improve spreadability and adherence, ensuring smooth and even coverage.

In cosmetic labeling, Polyglyceryl-3 Stearate SE is listed under its INCI name, reflecting its chemical identity as reaction products of 1,2,3-Propanetriol, homopolymer, with octadecanoic acid (1:1), neutralized, with an average molar ratio of 3 mol glycerol, used for regulatory and commercial purposes in the cosmetics industry.

Environmental and Safety Considerations

Polyglyceryl-3 Stearate SE 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. Proper use within recommended concentrations is essential to ensure safety and maximize 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.
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