Bis-Isobutyl PEG-24/PPG-7/Dimethicone Copolymer

Bis-Isobutyl PEG-24/PPG-7/Dimethicone Copolymer is a block copolymer made by reacting a mixture of bis-methallyl ethers of polypropylene glycol containing an average of 7 moles of propylene oxide and bis-methallyl ether polyethylene glycol containing an average of 24 moles of ethylene oxide with bis-hydrogen dimethicone.^[1] The number 24 in the name indicates the average number of added ethylene oxide units; within the same base structure, changing this number may also change water miscibility and the formulation's viscosity and spreadability. In cosmetics, it is used to form a thin film on the surface of skin, hair, or nails after application and to attract moisture to the formulation and skin's surface to help maintain hydration.^[3] In Europe, diethylene glycol remaining as an impurity in the raw material must be controlled at 0.1% or less.^[2]