Kester Wax K-24 – Solid To Liquid In A Blink

Kester Wax K-24 is a highly compatible and versatile ester that can be used in all areas of formulation for leave-on and wash-off applications.

Mechanism:

• Kester Wax K-24’s low melting point (25°C) is a direct result of its specific molecular structure. The short alkyl chains and ester linkage contribute to weak intermolecular forces, facilitating a rapid transition from a crystalline solid to a liquid state upon minimal heat input (skin contact).
• This rapid phase change involves the absorption of latent heat, which can manifest as a subtle cooling sensation. This is a transient endothermic process.

Formula Effect:

• This property is crucial for delivering an immediate “slip” effect in formulations. The instant liquefaction provides a smooth, gliding sensation upon application.
• The cooling effect, while subtle, can enhance the sensory profile of products, particularly in warm climates or for products designed for soothing applications.
• This rapid phase transition allows for the product to be easily workable during manufacturing.

Mechanism:

• As an emollient, Kester Wax K-24 forms a thin, nonocclusive film on the skin’s surface. This film lubricates the stratum corneum, reducing transepidermal water loss (TEWL) and enhancing skin hydration.
• The “dry, powdery” feel arises from the specific arrangement of the monoester molecules on the skin. This arrangement minimizes the perception of oiliness while maintaining lubricity.

Formula Effect:

• This characteristic allows formulators to create products with a luxurious, non-greasy texture, appealing to consumers who prefer lightweight formulations.
• It enables the creation of balanced formulations where the emollient properties of oils and esters are harnessed without the associated heavy or greasy feel.
• The film that is created is able to help with the even distribution of pigments, and other powder based ingredients.

Mechanism:

• Kester Wax K-24’s low viscosity and spreadability mimic the sensory attributes of low molecular weight, nonvolatile silicones (5-60cps). This is achieved through its non-polar, linear molecular structure, which facilitates easy spreading and a smooth, silky feel.
• Unlike silicones, which are synthetic polymers, Kester Wax K-24 is a plant-derived monoester, offering a natural alternative

Formula Effect:

• This property is highly valuable for formulators seeking to create “clean beauty” products.
• This plant derived alternative, offers a product that is more compatible with natural based formulations.

Mechanism:

• Kester Wax K-24’s ability to reduce greasiness is attributed to its unique interaction with other oils and esters in a formulation. It acts as a “sensory modifier,” altering the perceived texture without significantly affecting the overall lipid profile.
• It helps to disperse and evenly distribute other oils, preventing localized concentrations that contribute to a greasy feel.

Formula Effect:

•  This property is essential for creating formulations with optimal sensory balance, where the benefits of oils and esters are retained without the undesirable greasiness.
• It allows for greater flexibility in formulation design, enabling formulators to fine-tune the sensory attributes of their products with weightless finished and enhanced skin feel.
• It helps to create a more elegant, and less heavy feeling product.