Abstract
For maintaining beautiful hair and a healthy scalp by washing, leaving conditioning components on the hair's surface and providing moisture to the scalp during the washing process are requirements of hair-care products, such as shampoo and conditioner. We have developed a technology to adsorb conditioning silicone efficiently onto the hydrophilic surface of damaged hair by applying Ethyltrimethylammonium Chloride Methacrylate/Hydroxyethylacrylamide Copolymer which exhibits coacervation capabilities in shampoo solution. We have also found that DGA (Diglucosyl Gallic Acid) is useful for repair of the damaged surface during the rinsing process. Because DGA contains a large amount of the hydroxyl group and a carboxyl group in its molecular structure, DGA can adsorb the conditioning agent (cationic surfactant and higher alcohol) efficiently to the amide group on damaged hair. Furthermore, we have investigated the improved effect of drying scalp by using shampoo and conditioner containing a high concentration of moisturizing components. Decrease in moisture content and the itch score were reduced after using these hair care products for four weeks. These results suggest that hair care products containing a high concentration of moisturizing components will be suitable for improving dried scalp.
