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US 7,550,136 B2Granted
Photo-reactive polymers and devices for use in hair treatments
AssigneeUniversity of Massachusetts
InventorsJohn C. Warner, Amy S. Cannon, Jennifer Raudys, Arundhati Undurti
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Abstract
The invention provides new methods to treat hair to achieve a permanent wave, curl, or straightness.
Claims16
A method of treating hair to induce a permanent, reversible stiffening of hair shafts, the method comprising
- applying a water-soluble photoreactive polymer to the hair, wherein the photoreactive polymer comprises
- a photoreactive monomer selected from the group consisting of vinylbenzylthymines, vinylbenzyluracils, vinylphenylcinnamates, vinylcoumarins, vinylchalcones, N-acryloylamidopyridinium halides, and mixtures thereof and
- a water-soluble monomer selected from the group consisting of vinylbenzylammonium cations, vinylbenzylsulfonium cations, N-alkylvinylpyridinium ions, vinylphenylsufonate anions, vinylbenzoate anions, vinyphenylphosphate anions, vinylbenzamide ions, vinylphenylsufonamide ions, ethylene oxides, propylene oxides, oxazolines, and mixtures thereof;
- shaping the hair into a desired configuration;
- and
- irradiating the polymer at a wavelength from about 200 nm to about 600 nm to crosslink the polymer thereby stiffening the hair shafts sufficiently to maintain the desired configuration.
3 more elements
A method of treating hair to induce a permanent, reversible stiffening of hair shafts, the method comprising
- applying a water-soluble photoreactive polymer to the hair, wherein the photoreactive polymer is formed from vinylbenzylthymine monomers and water-soluble trimethyl ammonium benzyl bromide monomers;
- shaping the hair into a desired configuration;
- and
- irradiating the polymer at a wavelength from about 200 nm to about 600 nm to crosslink the polymer thereby stiffening the hair shafts sufficiently to maintain the desired configuration.
1 more element
Dependencies are inferred from the claim text.