Hair-coloring compositions, aerosol products, and methods for coloring hair

Abstract

The present disclosure relates to hair-coloring compositions comprising direct dyes, and aerosol hair-coloring products comprising the hair-coloring compositions. The hair-coloring compositions include: (a) at least one direct dye selected from nitro-phenylenediamines, nitro-aminophenols, azo dyes, anthraquinones, triarylmethane dyes, indophenols, and a mixture thereof; (b) at least one nonionic film forming polymer; (c) at least one thickening agent; (d) at least 40 wt. % of water, based on the total weight of the compositions; and (e) 40 wt. % or less of ethanol, based on the total weight of the composition. The hair-coloring compositions can be combined with a propellant and incorporated into a canister to provide a hair-coloring aerosol product. The compositions and aerosol products are useful for coloring hair.

Description

FIELD OF THE DISCLOSURE[0001]The present disclosure relates to water-based direct dye compositions that quickly and effectively color hair; and to methods for coloring hair.BACKGROUND[0002]There are many methods and products available for changing the natural color of hair. Semi-permanent or temporary dyeing methods, or direct dyeing methods, temporarily change the color of hair. These methods can change the color of the hair to varying degrees and the color change may withstand several rounds of shampooing. Many consumers seek more permanent results, and therefore default to oxidative dye products that contain hydrogen peroxide or other oxidants. In order to provide the consumer with the shade, longevity, and the intensity of color desired, an oxidative coloring process is utilized. Permanent hair dyeing formulations typically include primary intermediates (also known as oxidative hair dye precursors or developers) and couplers (also known as color modifiers or secondary intermedia...

AI Technical Summary

Benefits of technology

[0006]The present disclosure relates to hair coloring compositions comprising direct dyes, in particular, hair-coloring compositions (useful as juice) for use in hair-coloring aerosol spray products. The coloring compositions and the aerosol spray products are useful in methods for coloring hair, especially human hair. The coloring compositions, products, and methods provide excellent color deposition and intensity to hair and the color exhibits surprising tenacity (withstands multiple washings without appreciable fading). The inventors discovered that contrary to conventional wisdom, limiting the amount of ethanol in favor of higher amounts of water resulted in a surprising improvement in the color deposition and tenacity of direct dyes. The coloring is accomplished without requiring harsh oxidative chemical processing. The hair-coloring aerosol spray products are easy to use, color hair quickly, and are surprisingly effective.

Problems solved by technology

However, each attempt has its drawbacks.

However, the same strong binding force to the cuticle also prevents the chromophores from penetrating deep into the cortex of hair, because it is difficult for dyes with multiple positive charges to diffuse through negatively charged networks of keratin proteins.

Additionally, since polycationic dyes remain bound to the hair surface rather than penetrating into the fiber, it is difficult to produce dark shades, due to limited binding sites on the surface of hair.

This process can be messy and time consuming.

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