Liquid Crystal Hair Dye Composition, Use and Method

Abstract

A temporary liquid crystal hair colour composition for temporarily colouring hair, particularly, non-lightened, unbleached or dark hair is provided. The colour composition contains an encapsulated liquid crystal and a coating composition comprising a thickening agent and a rheology modifier and the hair retains a natural feel while exhibiting a vibrant colour effect.

Claims

1. A temporary hair colour composition comprising an encapsulated liquid crystal at a level of 10 to 60% by weight of the said composition and a coating composition comprising a thickening agent which comprises a cross-linked polyelectrolyte and/or a hydrophobically modified alkali swellable emulsion thickening product and a rheology modifier which comprises a glycol and the hair colour composition optionally further comprising an iridescent component.

2. A temporary hair colour composition according to claim 1, wherein the glycol is selected from polyalkylene glycol and a C.sub.2 to C.sub.4 alkylene glycol.

3. A temporary hair colour composition according to claim 2, wherein the rheology modifier comprises at least one of polyethylene glycol having from 20 to 40 glycol units and propylene glycol.

4. A temporary hair colour composition according to claim 1, wherein the thickening agent comprises a cross-linked polyelectrolyte.

5. A temporary hair colour composition according to claim 1, wherein the thickening agent comprises a cross-linked polyelectrolyte comprising one or more of a polyacrylate polymer, cross-polymer, a copolymer of a (poly)acrylate a polyacrylic acid, an alkyl acrylate, a urethane acrylate, a hydrophilically modified starch, a polyvinyl pyrollidone/vinyl acetate copolymer and polyquaternium compound.

6. A temporary hair colour composition according to claim 5, wherein the thickening agent comprises a cross-polymer of a (poly) acrylate.

7. A temporary hair colour composition according to claim 5, wherein the thickening agent comprises a polyvinyl pyrollidone/vinyl acetate copolymer.

8. A temporary hair colour composition according to claim 1, wherein the thickening agent comprises one or more of: i) an acrylate copolymer ii) an acrylate crosspolymer-6-2-methyl propan-2-ol; iii) an acrylate/C.sub.10-30 crosspolymer; iv) a cross-linked homopolymer of polyacrylic acid; v) an acrylate and urethane copolymer; vi) a polyvinylpyrollidone and vinyl acetate copolymer; vii) a copolymer of acrylate and steareth-20 methacrylate.

9. A temporary hair colour composition according to claim 1, further comprising an anionic polysaccharide.

10. A temporary hair colour composition according to claim 1, wherein the liquid crystal comprises a cholesteric and/or a chiral nematic liquid crystal.

11. A temporary hair colour composition according to claim 1, wherein the encapsulated liquid crystal is incorporated into the composition as an aqueous slurry comprising from 20 to 70% of the encapsulated liquid crystal.

12. A temporary hair colour composition according to claim 1, further comprising an iridescent component.

13. A temporary hair colour composition according to claim 12, wherein the iridescent component comprises: i) an iridescent component having a particle size of 1 to 50 microns; and/or ii) an iridescent component having a particle size of 50 to 200 microns.

14. A temporary hair colour composition according to claim 1, wherein: i) said thickening agent is selected from a cross-linked polyelectrolyte, and a hydrophobically modified alkali soluble emulsion (HASE) at a level of 0.5 to 15%, of the temporary hair colour composition; ii) said rheology modifier comprises a polyalkylene glycol at a level of 1 to 10% of the temporary hair colour composition; and the temporary hair colour composition further comprising: iii) a film-forming component at a level of 0.5 to 10% by weight of the temporary hair colour composition; iv) optionally an iridescent component at a level of up to 10% of the temporary hair colour composition; and v) optionally, where the thickening agent comprises a HASE requiring neutralisation, a neutralising agent at a level sufficient to neutralise the HASE to a pH of 6 to 8.

15. A temporary hair colour composition according to claim 1, wherein the composition is capable of being washed out of the hair after from 1 to 2 washes.

16. A method of colouring hair comprising applying to the hair the temporary hair colour composition according to claim 1 to coat hair fibres and retain a natural feel while providing a vibrant colour effect.

17. A method according to claim 16, wherein the hair to be coloured has not been subjected to a pre-treatment to lighten the hair before the colouring process, said colouring process comprises applying said temporary hair colour composition to the non-lightened hair.

18. A method according to claim 16, wherein the hair is unbleached.

19. A method according to claim 16, wherein the hair is dark, or mid-tone.

20. A method according to claim 16, wherein the temporary hair colour composition is as defined in claim 1.

21. A method of using the temporary hair colour composition of claim 1 to cosmetically treat hair.

22. A method according to claim 21, wherein the cosmetic treatment comprises at least one of: applying a colouring to the hair, applying a colour-change composition to the hair, and applying an iridescent effect to the hair.

Description

EXAMPLE 1

[0101] A composition according to the invention was prepared having the components listed in Table 1. The components for each phase were mixed and the phases mixed by mixing phase A and B, then phase C was added. Phases E and F can then be added separately in either order or together. Phase C was added after mixing phases A and B but may be added subsequently at any time if desired. Phase D was added at the end of the formulation for pH adjustment.

TABLE-US-00002 TABLE 1 Phase Raw material Usage Level (%) A Water 38%  SEPPIMAX ZEN (thickening agent) 1% Glycerol 0.5%   Propylene glycol (rheology modifier) 2.5%   PEG-32 (rheology modifier) 4% Sodium benzoate 0.4%   B Apricot Kernel oil 0.5%   PEG-40 Castor oil 1% Water 1% C Mica 5% Encapsulated liquid crystal (40% slurry) 25%  D Citric Acid 0.2%   E KERAVIS PE 0.5%   F Dye (0.5% solution) 20% 100% 

[0102] PEG-32 enhances the vibrancy and brightness of the colour effect by enhancing colour refraction. Glycerol and propylene glycol enhance the feel of the hair when treated with the composition. Sodium benzoate is a preservative and the pH is suitably adjusted to pH 2.5-4.0 using citric acid to optimise its functionality. Apricot kernel oil acts as a conditioning oil. EMULGIN L, an emulsifier, is available from BASF. KERAVIS PE, available from Croda, acts as a conditioning and colouring agent.

[0103] The product provided a static colour effect with an iridescent/chrome appearance and was in the form of a uniform translucent/turbid gel.

EXAMPLE 2

[0104] A composition according to the invention was prepared having the components listed in Table 2. The components for each phase were mixed and the phases mixed by mixing phase A and B, then phase D was added. Phase C was added after mixing phases A and B but may be added before, together with or after Phase D.

TABLE-US-00003 TABLE 2 Phase Raw material Usage Level (%) A Water 43.7%   SEPPIMAX ZEN 1% Glycerol 1% Germaben II 0.8%   Propylene glycol 1% KERAVIS PE 1% PEG-32 4% B Apricot oil 0.5%   PEG-40 hydrogenated castor oil 1% Water 1% C Encapsulated liquid crystal (40% slurry) 25%  D Dye (0.5% solution) 20.00%    100% 

[0105] The product has a trichromic tonal shift/static colour effect with an iridescent/chrome appearance and was in the form of a gel.

EXAMPLE 3

[0106] A composition according to the invention was prepared having the components listed in Table 3. The components for phase A were mixed, after which phase B was added to phase A until complete dispersion. Phase C can be added to phase A and B or it can be mixed into phase D and then C and D mixed into Phase A and B. Phase D is a 20% mixture of water soluble dyes/iridescent pigments. The composition has a pH between 5-6. No adjustment of the pH using a neutralising agent was necessary.

TABLE-US-00004 TABLE 3 Phase Raw material Usage Level (%) A Water 9% Glycerol 0.5%   Preservative 0.5%   Propylene glycol 3% Conditioning agent 6% LUVISKOL Film forming polymer 5% Glycofilm 1.5P 1.0%   B SEPPIMAX ZEN 1% C Encapsulated Liquid crystal (40%) slurry 54%  D Water 1% Dye (0.5% solution) 15%  Micas 4% to 100%

EXAMPLE 4

[0107] Compositions according to the invention were prepared having the components listed in Table 4. A range of compositions were prepared with differing Phase E components comprising water soluble dyes and optionally other aesthetic components for example iridescent pigments. The components for phase A were mixed, after which phase B was added to phase A until complete dispersion occurred. Phase C can be added to phase A and B or it can be mixed into phase D and/or E and the mixture then mixed into Phase A and B. Phase D and Phase E may be added to the composition at any time. A proportion of the water included in Phase A, for example 10 to 15\5 of the total composition, may be introduced to the composition as a component of Phase E.

TABLE-US-00005 TABLE 4 Phase Raw material Usage Level (%) A Water 34%  Disodium pyrophosphate 0.1%   Propylene glycol 3% PVP/VA Copolymer 60/40 W NP 3% Preservative 0.5%   B SEPPIMAX ZEN 1% C Encapsulated Liquid crystal (40%) slurry 50%  D Perfume 0.25%   E Dyes 0.1-1%     to 100.00%

[0108] The dyes may be selected according to the desired effect and also according to the base shade of the hair to which the composition is to be applied. Different dyes may be selected according to whether the base shade is dark brown, light brown, blonde or other base shades.

EXAMPLE 5

[0109] A range of compositions having the compositions of Example 1 to 4 may be prepared in which the mica is selected from the following materials, available from BASF: [0110] soft sparkle rose 480P, mica based Multireflections, colour variable [0111] twisted terracotta G390D, mica based Multireflections, colour variable [0112] shifting sapphire G680D, mica based Multireflections, colour variable [0113] glistening gold G280D, mica based Multireflections, colour variable [0114] Black MN4498, Timica [0115] Snowfall white S130D, Chione [0116] rouge flambe, 440X, Cloisonne [0117] YG gold green 822C, Duocrome [0118] sparkle blue 626J, Cloisonne [0119] goldstone G014, Gemstone colours [0120] tan opal G005, Gemstone colours [0121] moonstone G004, Gemstone colours [0122] violet 520C, Flamenco [0123] shimmering gold G230Z, Reflecks [0124] red MN 4506, Timica terra colours [0125] violet 530FR, Timica interference [0126] Bronze 240AB, Timica nu-antique [0127] sparkle copper 350J, Cloisonne sparkle colours

[0128] and Covapearl®, Covapearl® Star and Covapearl® Mini Star range, micas available from Sensient.

EXAMPLE 6

[0129] Composition produced in Examples 1 to 4 were applied to dark hair and light hair and found to provide an excellent combination of colour intensity, vibrancy, whilst retaining excellent feel properties. When applied to dark hair, the compositions provided bright observable colours.