Cationic conditioning agents and amino-functional silicones for hair and skin care u2014 behentrimonium and cetrimonium chloride, Polyquaternium-7 and -10, amodimethicone, and silicone quaternium-22.
Conditioning agents are cationic and polymeric materials that deposit ontonhair and skin, classed in INCI as hair conditioning and antistatic agents. Thenfamily splits three ways: small cationic quats (behentrimonium and cetrimonium chloride),ncationic polymers (the polyquaterniums), and amino-functional silicones (amodimethicone,nsilicone quaternium-22). Each carries a positive charge that binds to the negativelyncharged surface of keratin, which is what makes the class substantive through a rinse.
nnSubstantivity is the working property, and it sets the central trade-off. Small quatsnsuch as cetrimonium chloride deposit quickly and rinse cleaner, while heavier quats likenbehentrimonium chloride and cationic polymers (Polyquaternium-7, Polyquaternium-10) buildna more durable film-forming deposit that can accumulate over repeated use. Specify thenlighter quats where a clean rinse-off matters; specify the polymers where a durablendeposit on the fiber is the goal.
nnAmino-functional silicones are the substantive silicone option in this family.nAmodimethicone and silicone quaternium-22 carry amine or quaternary groups that adsorb tonthe higher-charge regions of weathered fiber, unlike a plain silicone fluid that coatsnuniformly. Pair an amidoamine such as stearamidopropyldimethylamine with an acid to formnthe cationic species in place, a cost-controlled route for rinse-off conditioner bases.
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