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| Catalog Number | CI-SC-1230 |
| Product Name | PCA Dimethicone |
| CAS | 179005-03-9 |
| Synonyms | Siloxanes and Silicones, 3-(4-carboxy-2-oxo-1-pyrrolidinyl)propyl Me, di-Me;3-(4-Carboxy-2-oxo-1-pyrrolidinyl)propyl methyl siloxane, polymer with dimethylsiloxane, trimethylsilyl-terminated |
| Boiling Point | >200 °C |
| Flash Point | 81°C |
| Purity | 30-100% |
| Density | 0.98 g/mL |
| Appearance | Liquid / Solid |
| Highest Usage In Residency Products | 0.0612 |
PCA Dimethicone is an innovative ingredient designed to enhance both leave-on and rinse-off conditioning and cleansing products. As an isomer of the natural moisturizing factor "PCA," it is bonded to a silicone backbone, which significantly reduces the interfacial tension between water and silicone, demonstrating high affinity for keratin protein in hair. This composition allows each PCA group to retain multiple units of moisture and form ionic bonds with free amino groups present on the hair shaft. When formulated at approximately a 5% level in shampoos or conditioners, PCA Dimethicone facilitates ease of formulation at lower temperatures while providing enhanced slip, volume, and conditioning properties. For optimal slip performance, the recommended pH range is between 4.5 and 7. Notably, PCA Dimethicone imparts a remarkable slip and shine during rinsing, and its anionic mechanism yields a layered, hydrated silicone film that refracts light efficiently. This lamellar arrangement reduces friction significantly when exposed to water, ensuring detailed conditioning properties until completely rinsed. It also contributes to increased hair volume and styling manageability. For altered sensory effects after rinsing, combining PCA Dimethicone with cationic and quaternary conditioners is recommended.
What is PCA Dimethicone, and what are its primary components?
PCA Dimethicone is an isomer of the natural moisturizing factor "PCA" that is covalently bonded to a silicone backbone. This unique formulation enables its easy addition to leave-on and rinse-off conditioning and cleansing products.
How does PCA Dimethicone interact with hair and skin?
The product contains a pyrrolidone carboxylic acid group, which significantly reduces the interfacial tension between water and silicone. This group has a high affinity for keratin protein due to its ability to hold multiple units of moisture and form ionic bonds with any free amino group on the hair shaft.
What are the benefits of using PCA Dimethicone in hair care products?
PCA Dimethicone offers a higher degree of slip, volume, and conditioning. It provides remarkable slip and shine properties during rinsing and adds volume, making hair easier to style. The presence of water during application results in an unusually low coefficient of friction, offering a smooth and slippery feel during conditioning.
How should PCA Dimethicone be formulated into hair care products?
It is recommended to use PCA Dimethicone at about a 5% level in a conditioner or shampoo. This premix allows for easier formulation at lower temperatures. The optimal pH range for the product to maximize slip properties is 4.5 to about 7.
Can PCA Dimethicone be used in conjunction with other conditioners?
Yes, cationic and quaternary conditioners can be used in combination with PCA Dimethicone. This combination can alter sensory properties after rinsing, providing additional customization options in product formulations.
What is the mechanism behind the conditioning properties of PCA Dimethicone?
The mechanism is anionic, where the hydrated silicone film forms a layered (lamellar) system that leaves a hydrated film structure on the hair or skin. This structure refracts light focused in a geometrically normal manner, enhancing shine. The lamellar layers easily slide over each other, reducing friction and improving slip and conditioning until fully rinsed.
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