Description

Polyglyceryl-3 Isostearate is a widely used cosmetic ingredient, primarily functioning as an emulsifier in various skin care and makeup products. It is composed of polyglycerin-3 and isostearic acid, resulting from the esterification process to form 1,2,3-Propanetriol, homopolymer, isooctadecanoates at a 1:1 molar ratio, with an average of 3 moles of glycerol. This ingredient enhances the texture and stability of cosmetic formulations while also providing moisturizing benefits.

Chemical Composition and Structure

This compound blends the emollient properties of isostearic acid, a branched-chain fatty acid known for its excellent skin conditioning and spreading properties, with the hydrating and stabilizing capabilities of polyglycerin-3. The resulting ester is effective in stabilizing oil-in-water and water-in-oil emulsions, improving product application and skin feel.

Physical Properties

Polyglyceryl-3 Isostearate appears as a viscous, semi-solid or waxy substance at room temperature. It is soluble in oils and has moderate solubility in water, making it particularly effective in creating stable emulsions that are smooth and easily absorbed by the skin.

Production Process

Synthesis: The synthesis involves the controlled esterification of polyglycerin-3 with isostearic acid, aiming for a specific molar ratio to achieve optimal emulsifying properties. The process typically requires precise temperature control and catalysts to ensure a successful reaction and high-quality ester formation.
Purification: After synthesis, the product undergoes purification to remove unreacted materials and by-products. This step ensures the purity and quality of the ingredient for cosmetic use.
Quality Control: Rigorous quality control tests are conducted to verify the stability, purity, and efficacy of Polyglyceryl-3 Isostearate in cosmetic formulations. These tests might include performance evaluations in emulsion systems, stability testing under different environmental conditions, and compatibility with other cosmetic ingredients.

Applications

Cosmetic Products: Utilized in a broad range of products, including creams, lotions, sunscreens, and makeup foundations, where it serves as an effective emulsifier that aids in blending oil and water components, thus enhancing the consistency and feel of the product.
Skin Care: Particularly beneficial in moisturizing and reparative formulations aimed at dry or sensitive skin, where it helps to reinforce the skin's barrier and lock in moisture.
Makeup: Used in makeup products to improve the application, ensuring a smooth and even finish while providing a hydrating effect.

Environmental and Safety Considerations

Polyglyceryl-3 Isostearate 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. The ingredient is derived from relatively benign sources, making it a responsible choice in terms of environmental impact. Proper usage within recommended concentrations is crucial to ensure safety and 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: 127512-63-4