Items | Specifications | Results |
Appearance | White or pale yellow paste solid | Pale yellow paste solid |
Odor | Odorless or slight characteristic odour | Slight characteristic odour |
Acid value(mgKOH/g) | 0-2 | 1.2 |
Saponification value( mgKOH/g) | 270-290 | 279.5 |
Conclusion | The result conform to the Specification |
BIS-DIGLYCERYL POLYACYLADIPATE-2 is a complex, synthetic polymer (a polyester) widely used in the cosmetics and personal care industry. Its primary function is as a film-forming agent and emollient. It is particularly valued as a modern, innovative ingredient that provides a superior sensory experience, often serving as a plant-derived alternative to silicones and other synthetic film-formers.
Chemical Composition and Production
The name describes its structure and production:
Diglyceryl: Refers to a subunit derived from glycerin (a sugar alcohol).
Polyacyladipate: Indicates it is a polymer made from adipic acid (a dicarboxylic acid) and fatty acids ("acyl" refers to the fatty acid chains).
Bis-: Implies a linking or bridging structure between two of these polymer chains.
In simpler terms, it is created by reacting biological-derived materials like glycerin and fatty acids (often from plant sources like rapeseed or castor oil) with adipic acid to form a large, flexible polyester molecule. This synthesis results in an ingredient that is often touted as being over 50% natural-origin.
Key Functions and Benefits
1. Film Formation:
This is its most critical property. It forms a very thin, flexible, continuous, and breathable film on the skin or hair. This film acts as a barrier that:
Reduces Transepidermal Water Loss (TEWL): It effectively locks in moisture, making it an excellent hydrating agent.
Provides Water Resistance: It enhances the durability and water resistance of products like sunscreens and long-wear makeup.
2. Emolliency:
It imparts an exceptionally smooth, silky, and luxurious feel to formulations. It fills in the micro-irregularities on the skin's surface, creating a velvety-smooth canvas.
3. Sensory Modifier:
It is renowned for its unique sensory properties. It delivers:
Non-Greasy, Non-Occlusive Feel: It spreads easily and absorbs quickly without a heavy or sticky residue.
"Soft Focus" Effect: The film can help to optically blur the appearance of fine lines and pores, similar to silicones.
Significant Slip: It provides excellent lubricity, making products easy to blend.
4. Alternative to Silicones:
For brands marketing "clean" or "natural" beauty products, it is a popular alternative to dimethicone and other silicones, as it can mimic their desirable sensory benefits while being derived from biological sources.
Common Applications
You will find this ingredient in a wide range of high-performance cosmetics, including:
Moisturizers & Creams: For long-lasting hydration and a smooth finish.
Sunscreens: To improve water resistance and spreadability.
Foundations & Primers: To create a pore-blurring, smooth base that improves makeup longevity.
BB/CC Creams: For a blend of skincare and makeup benefits.
Hair Care Products: In conditioners and serums to provide shine and reduce frizz without buildup.
Safety and Considerations
Safety Profile: It is generally considered safe for topical use in cosmetics. It has a low potential for irritation and is non-comedogenic (does not clog pores).
Regulation: It is approved for use in cosmetics and listed in the International Nomenclature of Cosmetic Ingredients (INCI).
In summary, BIS-DIGLYCERYL POLYACYLADIPATE-2 is a versatile, high-performance cosmetic polymer that effectively binds moisture to the skin, provides a luxurious sensory feel, and enhances the durability of formulations, making it a staple in modern skincare and makeup.
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