摘要：

Polymeric materials are critically important to the creation of modern cosmetics and personal-care products. Low VOC regulations have driven the polymer manufacturers to create fixatives that can be delivered from aqueous solutions . In this context, block-copolymers and microgel thickeners that also form films have been developed. Hydrophobically-modified cross-linked polyelectrolytes have been developed as polymeric emulsifiers for the triggered release of the oil phase when application to the substrate - this has found use in sports sunscreens. Skin emulsions are trending towards lower pH values and ingredients such as alpha hydroxyacids are being included. Hydrophobically- modified Acryloyldimethyltaurate copolymers have been developed thicken such systems in this relatively hostile environment for conventional rheology-modifiers. Associative thickeners are being extensively used in hair-coloring products to gel the product on the substrate, but to simultaneously allow good color development. Free radical, living polymerization techniques hold promise for the development of systems having well-defined mesomorphic morphology for the design of novel rheology-modifiers and delivery systems. A horde of new cationic polymers have been developed for conditioning purposes, but conditioning shampoos continue to be dominated by the workhorses, Polyquaternium-10 and Guar hydroxypropyltrimonium chloride. Stimuli-responsive polymers are being used in applications from make-up that camouflages wrinkles to the facile processing of multiple emulsions, to thermally-responsive systems that respond to the surface of skin.

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