Nonhydrocarbon Specialty Surfactants Alkoxylated Polysiloxanes

Surfactants, which can be classified in the chemical group of organosilicones, are structurally derived from polydimethylsiloxanes in which some methyl are replaced by hydro-philic groups that can be of anionic, cationic, or nonionic nature. The nonionic derivatives are mostly represented by the polyether-polydimethylsiloxane-copolymers. The general structure of these surfactants is shown in structure 37. The hydrophilic chain(s) generally contain EO/PO block copolymers.

These surfactants are specialty ingredients and are used in very different fields (e.g., painting, foam control, phytosanitary products). They are also used in cosmetics and haircare:

1. in cosmetic or personal-care products as emulsifiers in, e.g., protective creams, hydrating body milks, liquid soaps, and shave creams, and

2. in haircare products (e.g., shampoos, conditioners, gels, lotions, foams) to act as combing out auxiliaries, to reduce the irritancy of surfactant system, to provide improved skin feel, or to control the foam. The CTFA-adopted name of these surfactants is Dimethicone Copolyol.

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