Hair treatment process providing dispersed colors by light diffraction
View Patent ↗Hair was coated with polymer-containing fluid and then hot pressed to form a composite of hair and a polymer film imprinted with a nanopattern. Polychromatic light incident on the nanopattern is diffracted into dispersed colored light.
1. A hair treatment process comprising:
a. coating hair with a fluid comprising a suitable polymer;
b. placing the coated hair in a pressing device, the pressing device comprising a heating block and a nanopatterned surface which is capable of diffracting incident light into dispersed colors, the pressing device capable of transforming the coated hair into a hair-polymer film composite, the hair-polymer film composite having a surface with a complimentary nanostructured surface pattern;
c. hot pressing the coated hair with the pressing device under conditions suitable for forming the hair-polymer film composite; and
d. removing the hair-polymer film composite from the pressing device wherein the hair-polymer film composite diffracts polychromatic light into dispersed visible colors.
2. The hair treatment process of claim 1 , further comprising cleaning and drying the hair prior to coating the hair with the fluid.
3. The hair treatment process of claim 1 , wherein the fluid is a dispersion.
4. The hair treatment process of claim 1 , wherein the fluid has a glass transition temperature of from about 55 degrees Celsius to about 90 degrees Celsius.
5. The hair treatment process of claim 1 , wherein the fluid further comprises a plasticizer.
6. The hair treatment process of claim 1 , wherein the fluid further comprises a surfactant.
7. The hair treatment process of claim 1 , wherein the fluid is an aqueous fluid.
8. The hair treatment process of claim 1 , wherein the fluid further comprises an alcohol.
9. The hair treatment process of claim 8 , wherein the alcohol is ethanol.
10. The hair treatment process of claim 1 , wherein the polymer is selected from the group consisting of poly-lactic acid polymers, acrylate polymers, polyvinyl alcohol polymers, polyurethane polymers, copolymers thereof, and mixtures thereof.
11. The hair treatment process of claim 1 , wherein the coated hair is pressed with the pressing device at a pressure of from about 3 psi to about 7 psi.
12. The hair treatment process of claim 1 , wherein the polymer has a glass transition temperature, and the coated hair is pressed with the pressing device at a temperature above the glass transition temperature of the polymer.
13. The hair treatment process of claim 1 , wherein the incident light is selected from the group consisting of white light, sunlight, theatrical light, and combinations thereof.
14. The hair treatment process of claim 1 , wherein the nanopatterned surface comprises a pattern selected from the group consisting of sawtooth patterns, spiral patterns, ring patterns, Archimedean patterns, ellipsoidal patterns, patterns having hyperbolic rings, patterns having parabolic rings, and combinations thereof.
15. The hair treatment process of claim 1 , wherein the hair-polymer film composite is removable.
16. The hair treatment process of claim 15 , wherein the hair-polymer film composite is removable by shampooing.