Shampoo compositions

Abstract

Modern shampoos contain ingredients that provide general cleansing function and impart the cosmetic effects such as looking good and feeling better. Most commercial shampoos for normal hair are based on anionic surfactants and composed of more than two types of surfactants. The surfactants can be divided into three classes: anionic, amphoteric and nonionic surfactants, because each class has different functions. For example, anionic surfactants such as sodium/ammonium laureth sulfates (SLES/ALES), sodium/ammonium laury sulfates (SLS/ALS) and TEA cocoyl glutamate have cleaning, emulsifying and foaming functions. Amphoteric surfactants such as cocamidopropyl betain (CAPB) are typically used for increasing the viscosity and reducing the eye and skin irritation in the presence of anionic surfactants. For these reasons, amphoteric surfactants are mainly used in mild formulations such as baby shampoos. Nonionic surfactants such as cocomonoethanol amide (CME), cocodiethanol amide (CDE) are used as a foam booster and viscosity builder in the presence of anionic surfactants. Especially, alkyl polyglucoside (APG) is increasingly used in shampoos and detergents due to its low toxicity, environmental compatibility and excellent physical properties. In order to increase the conditioning effect in shampoos, polydimethylsiloxane (PDMS) and the cationic water soluble polymers which have the quaternized nitrogen bonded to the backbone of the water soluble polymer are used. In addition to cleaning and conditioning agents, some valid ingredients are used. These ingredients can be a chelating agent, a pH adjuster, a pearling agent, inorganic salts, oils, preservatives, antidandruff agents and fragrance, etc.