Bleach powders comprising alkanes

Abstract

A bleaching powder composition A for keratin fibers, preferably human keratin fibers, more preferably for human hair, comprising: a) one or more oxidizing agent(s), preferably one or more persalt(s) and / or peroxy salt(s), b) one or more C13-C21 alkane(s), and / or their mixtures, c) one or more alkalizing agent(s), wherein the total concentration of water is less than 10% by weight, preferably less than 5% by weight, more preferably less than 1% by weight, still more preferably less than 0.5% by weight, calculated to the total weight of composition A, more preferably composition A is anhydrous.

Description

[0001] BLEACH POWDERS COMPRISING ALKANES

[0002] Field of the invention

[0003] The present invention relates to a bleaching composition for human hair, a bleaching kit-of-parts, a ready-to-use bleaching composition, and bleaching process.

[0004] Background of the invention

[0005] Changing hair color can give a new fresh look, improve the self-image, and / or promote enhancement of the self-esteem of the clients. In most cases to get another hair color, the color must be lifted, especially for going from a brown or dark brown / black to a light shade or if fashion shades are desired. Therefore, bleaching is widely used to prepare for coloring, but as well to get blonder. In both cases different applications are used such as whole head lightening, as well for partial treatments such as streaks for highlights or lifting the tips e.g., for balayage. Often a high lightening is desired. A standard bleaching product comprises two components: a bleaching powder and an oxidizing composition. Both are mixed to get a creamy product, which is applied on the hair.

[0006] The powder component contains persulfates and alkalizers. To prevent dust formation, paraffin oil is added to the powder composition, which binds the small particles so that the powder character is retained. However, during production the addition of paraffin oils decreases the powder yield. Thus, there is a real need to develop bleaching powder compositions with higher powder yields to reduce raw material waste.

[0007] Summary of the invention

[0008] The first object of the present invention is a bleaching powder composition A for keratin fibers, preferably human keratin fibers, more preferably for human hair, comprising: a) one or more oxidizing agent(s), preferably one or more persalt(s) and / or peroxy salt(s), b) one or more C13-C21 alkane(s), and / or their mixtures, c) one or more alkalizing agent(s), wherein the total concentration of water is less than 10% by weight, preferably less than 5% by weight, more preferably less than 1 % by weight, still more preferably less than 0.5% by weight, calculated to the total weight of composition A, more preferably composition A is anhydrous.

[0009] The second object of the present invention is a two-part bleaching and / or lightening composition for keratin fibers, preferably human hair, wherein the first composition is composition A as defined above and the second composition B is an aqueous acidic composition comprising hydrogen peroxide having a pH in the range of 1 to 6.

[0010] The third object of the present invention is a kit for keratin fibers, preferably for human keratin fibers, more preferably for human hair, comprising the compositions A and B as defined above and at least one further composition selected from: a) an aqueous composition comprising one or more conditioning ingredients, b) an aqueous composition comprising one or more oxidative dye(s) and / or direct dye(s), c) an aqueous composition comprising one or more cleansing surfactant(s).

[0011] The third object of the present invention is a ready-to-use bleaching and / or lightening composition for keratin fibers, preferably human hair, having a pH in the range of 9 to 11 comprising the following compound(s): a), b), c) as defined above, hydrogen peroxide.

[0012] The fourth object of the present invention is a process for bleaching keratin fibers, preferably human keratin fibers, more preferably for human hair comprising the steps: i) optionally washing the hair with a cleansing composition and drying the hair, ii) mixing the bleaching and / or lightening composition A as defined above with the aqueous composition B as defined above to prepare the ready-to-use composition as defined above; then iii) applying the ready-to-use composition onto hair for period of 1 to 45 min, preferably 10 to 45 min, more preferably 25 to 45 min; then iv) rinsing off the hair with water or optionally washing with a cleansing composition; v) optionally drying the hair.

[0013] Detailed description of the invention

[0014] Inventors surprisingly found that the invention according to the independent claims increase the powder yield during production and additionally improves optical parameters of the mixed product such as gloss and smoothness / homogeneity of the product. Additionally, the mixing speed was increased.

[0015] The present invention is directed to a bleaching powder composition A for keratin fibers, preferably human keratin fibers, more preferably for human hair, comprising: a) one or more oxidizing agent(s), preferably one or more persalt(s) and / or peroxy salt(s), b) one or more C13-C21 alkane(s), and / or their mixtures, c) one or more alkalizing agent(s), wherein the total concentration of water is less than 10% by weight, preferably less than 5% by weight, more preferably less than 1 % by weight, still more preferably less than 0.5% by weight, calculated to the total weight of composition A, more preferably composition A is anhydrous.

[0016] Compound(s) according to group a) - Oxidizing agent(s)

[0017] The composition A of the present invention comprises one or more oxidizing agents as compound(s) according to group a). Preferably, the one or more oxidizing agents as compound(s) according to group a) are one or more persalt(s) and / or peroxy salt(s).

[0018] Suitable non-limiting examples of one or more oxidizing agent(s) are sodium persulphate, ammonium persulphate, potassium persulfate, potassium dichromate, potassium perchlorate, peroxydisulfuric acid, peroxymonosulfuric acid, melanin peroxide, sodium perborate, sodium tetraborate, and / or their mixtures.

[0019] The most preferred one or more oxidizing agent(s) is / are sodium persulphate, ammonium persulphate, potassium persulfate, and / or their mixtures.

[0020] It is preferred that the total concentration of oxidizing agent(s) according to group a) is in the range of 1 % to 60% by weight, preferably in the range of 2% to 50% by weight, more preferably in the range of 5% to 40% by weight, calculated to the total weight of composition A.

[0021] Compound(s) according to group b) - C13-C21 alkane(s)

[0022] The composition A of the present invention comprises one or more compound(s) according to group b) selected from linear or branched, saturated C13-C15 alkane(s), C15-C17 alkane(s), C18-C21 alkane(s), C15-C19 alkane(s), hydrogenated farnesene, and / or their mixtures, preferably linear or branched, saturated C13-C15 alkane(s), C18- C21 alkane(s), hydrogenated farnesene, and / or their mixtures.

[0023] It is preferred that the total concentration of one or more compound(s) according to group b) is in the range of 1 % to 20% by weight, preferably in the range of 2% to 15% by weight, more preferably in the range of 5% to 12% by weight, calculated to the total weight of composition A.

[0024] Dynamic viscosity of the compound(s) according to group b)

[0025] It is preferred that the dynamic viscosity of the one or more compound(s) according to group b) is in the range of 1 mPas to 40 mPas, preferably in the range of 2 mPas to 25 mPas, more preferably in the range of 2 mPas to 20 mPas, still more preferably in the range of 2 mPas to 15 mPas, measured at 20°C and atmospheric pressure according to ASTM D7042 (2001 ).

[0026] Table 1 . Juxtaposition of viscosities of the commonly used paraffin oil vs. the inventive alternatives.

[0027] According to ASTM D7042 (2001 ) the viscosity measurements of oily samples require homogeneity and must free of bubbles. The air bubbles were eliminated by treatment with an ultrasonic bath. Homogeneity of samples was achieved by stirring with a magnetic stirrer. The fluid samples were preheated in lab oven and injected into the measuring cell. The viscosities were measured according to a modified Couette measuring principle. The viscosity was measured with SVM Smart Viscometer. Compounds according to group c) - Alkalizing agent(s)

[0028] The composition A of the present invention comprises one or more compound(s) according to group c).

[0029] Suitable non-limiting examples of one or more alkalizing agent(s) is / are one or more disilicate(s), one or more metasilicate(s), one or more carbonate(s), one or more bicarbonate(s), and / or their mixtures.

[0030] Preferably said one or more compound(s) according to group c) is one or more disilicate(s) or one or more metasilicate(s), and / or their mixtures, and more preferably one or more compound(s) according to group c) is / are selected from sodium disilicate, sodium metasilicate, and / or their mixtures,

[0031] It is preferred that the total concentration of the one or more compound(s) according to group c) is in the range of 1 % to 40% by weight, more preferably 5% to 35% by weight, still more preferably in the range of 10% to 35% by weight, still more preferably in the range of 10% to 30% by weight, still more preferably in the range of 15% to 30% by weight, calculated to the total weight of composition A.

[0032] Pulverulent excipient(s)

[0033] The composition of the present invention is characterized in that composition A comprises one or more pulverulent excipients selected from organic / inorganic materials such as diatomaceous earth, cellulose, starch especially com, tapioca, rice, wheat and potato, nylon powder, gypsum, sawdust and perlite, and more preferably the total concentration of said pulverulent excipients in composition A is in the range of 10% to 50% by weight, preferably 15% to 40% by weight, calculated to the total weight of composition A.

[0034] The term ‘excipient’ within the meaning of the present invention denotes a compound that does not react with any of the components of the bleaching composition - is an inactive substance - and serves as the vehicle or medium for other active substance(s). The excipient constitutes the base on which the formula of cosmetic product rests.

[0035] Thickening polymer(s) The composition according to any of the preceding claims characterized in that composition A further comprises one or more thickening polymer(s) according to group d), preferably the one or more compound(s) according to group d) group d) are selected from non-ionic thickening polymers such as the cellulose-based polymers, like cellulose, cellulose gum, methylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxyethyl-methylcellulose, and alkylated hydroxyl celluloses such as (C2-C8)-alkylcelluloses or cetyl hydroxyethylcellulose, anionic thickening polymers such as the naturally-based anionic polymers and / or synthetic anionic polymers hypromellose, xanthan gum, dehydroxanthan gum, hydroxypropylxanthan gum, carboxymethyl cellulose, and starch-based polymers such as vegetable starch and / or their synthetically modified derivatives such as hydroxypropyl starch phosphate, or the alginic acids, sodium alginates, ammonium alginates, calcium alginates, gum arabic, and quar gum, preferably the one or more thickening polymers are cellulose, cellulose gum, carboxymethyl cellulose, xanthan gum and / or dehydroxanthan gum.

[0036] It is preferred that the total concentration of one or more compound(s) according to group d) is in the range of 1 % to 10% by weight, more preferably in the range of 3% to 7% by weight, calculated to the total weight of composition A.

[0037] Conditioning ingredients

[0038] Furthermore, the composition of the present invention can comprise one or more additional hair conditioning ingredients selected from synthetic oils, natural oils, cationic surfactants, anionic surfactants, or non-ionic surfactants.

[0039] Two-part bleaching and / or lightening composition

[0040] Another object of the invention is a two-part bleaching and / or lightening composition for keratin fibers, preferably human hair, wherein the first composition is composition A as described above, and the second composition B is an aqueous acidic composition comprising hydrogen peroxide having a pH in the range of 1 to 6, preferably in the range of 2 to 4, more preferably in the range of 2.5 to 4.

[0041] Preferably, the total concentration of hydrogen peroxide in composition B is in the range of 1 % to 30% by weight, preferably in the range of 2% to 25% by weight, more preferably in the range of 3% to 20% by weight, calculated to the total weight of composition B.

[0042] Composition A and B are kept separate until directly prior to application onto the keratin fibers.

[0043] Kit for keratin fibers

[0044] Another object of the invention is the kit for keratin fibers, preferably for human keratin fibers, more preferably for human hair, comprising the compositions A and B as defined above and at least one further composition selected from:

[0045] - an aqueous composition comprising one or more conditioning ingredients,

[0046] - an aqueous composition comprising one or more oxidative dye(s) and / or direct dye(s),

[0047] - an aqueous composition comprising one or more cleansing surfactant(s).

[0048] Ready-to-use bleaching and / or lightening composition

[0049] Another object of the invention is a ready-to-use bleaching and / or lightening composition for keratin fibers, preferably human hair, having a pH in the range of 9 to 11 comprising the following compound(s) a), b), c) as defined above, and hydrogen peroxide.

[0050] Preferably, the ready-to-use composition is an aqueous composition with total water concentration of 50% by weight or more, calculated to the total weight of the ready-to- use composition.

[0051] The pH for the present invention is measured with a glass electrode at 25°C and under atmospheric conditions.

[0052] Preferably, the viscosity of the ready-to-use mixture is in the range of 50,000 mPas to 100,000 mPas, measured with a Brookfield RV viscometer at 25°C and spindle number 6 at 10 rpm.

[0053] Process of bleaching keratin fibers

[0054] Still another object of the invention is the process for bleaching keratin fibers, preferably human keratin fibers, more preferably for human hair comprising the steps: i) optionally washing the hair with a cleansing composition and drying the hair, ii) mixing the bleaching and / or lightening composition A according to any of the claims 1 to 9 with the aqueous composition B as defined above to prepare the ready-to-use composition as defined above; then iii) applying the ready-to-use composition onto hair for period of 1 to 45 min, preferably 10 to 45 min, more preferably 25 to 45 min; then iv) rinsing off the hair with water or optionally washing with a cleansing composition; v) optionally drying the hair.

[0055] The following examples are to illustrate the invention, but not to limit it.

[0056] EXAMPLES

[0057] Table 2. Powder compositions (Invention 1 and 2) representing composition A according to the invention and a comparative formulation with paraffin oil.

[0058] * Emosmart V21 offered by Seppic Corp.

[0059] ** Neossance Hemisqualene offered by Centerchem, Inc.

[0060] Composition B

[0061] [% by weight]

[0062] Hydrogen peroxide 6.0

[0063] EDTA 0.5

[0064] Phosphoric acid Ad pH 2.5

[0065] Water Ad 100.00 Discussion of results

[0066] The results clearly show that the inventive compositions 1 and 2 resulted in less loss of product due to the usage of C13-C21 alkanes instead of the commonly used paraffin oil.

[0067] Methods

[0068] To prepare bleaching powder composition A, the solid ingredients were weighed and placed in a ball mill and mixed for 30 minutes. This produced a homogeneous powder. During mixing, the liquid components (oil and fragrance) were weighed and placed in a beaker and mixed by stirring. To avoid lumping or uneven distribution of the oil, the oil was added to the powder drop by drop. The powder was mixed several times to avoid higher concentrations of oil on the surface. After all the oil was added, the mixing was continued in the ball mill for another 10 minutes. The powder was then removed from the ball mill, weighed again and sieved to remove lumps.

[0069] For the application, these bleaching powder compositions A were mixed with a composition B presented above. The mixing ratio of bleaching powder composition A to composition B was 1 :1.4 by weight. In all cases, the pH of the mixtures was 10.4±0.1 .

[0070] The optical parameters were evaluated with the naked human eye by 5 independent experts who were blinded to the type of compositions they were evaluating. The experts were asked to rate the gloss on an integer scale from 1 to 5, with 5 being the highest rating. The arithmetic mean was reported.

Claims

Claims1 . A bleaching powder composition A for keratin fibers, preferably human keratin fibers, more preferably for human hair, comprising: a) one or more oxidizing agent(s), preferably one or more persalt(s) and / or peroxy salt(s), b) one or more C13-C21 alkane(s), and / or their mixtures, c) one or more alkalizing agent(s), wherein the total concentration of water is less than 10% by weight, preferably less than 5% by weight, more preferably less than 1 % by weight, still more preferably less than 0.5% by weight, calculated to the total weight of composition A, more preferably composition A is anhydrous.

2. The composition according to any of the preceding claims characterized in that the one or more compound(s) according to group a) are sodium persulfate, ammonium persulfate, potassium persulfate, potassium dichromate, potassium perchlorate, peroxydisulfuric acid, peroxymonosulfuric acid, melanin peroxide, sodium perborate, sodium tetraborate, and / or their mixtures, preferably one or more compound(s) according to group a) is / are sodium persulfate, ammonium persulfate, potassium persulfate, and / or their mixtures.

3. The composition according to any of the preceding claims characterized in that the total concentration of oxidizing agent(s) according to group a) is in the range of 1 % to 60% by weight, preferably in the range of 2% to 50% by weight, more preferably in the range of 5% to 40% by weight, calculated to the total weight of composition A.

4. The composition according to any of the preceding claims characterized in that the one or more compound(s) according to group b) have a dynamic viscosity in the range of 1 mPas to 40 mPas, preferably in the range of 2 mPas to 25 mPas, more preferably in the range of 2 mPas to 20 mPas, still more preferably in the range of 2 mPas to 15 mPas, measured at 20°C and atmospheric pressure according to ASTM D7042 (2001 ).

5. The composition according to any of the preceding claims characterized in that the one or more compound(s) according to group b) are selected from linear or branched, saturated C13-C15 alkane(s), C15-C17 alkane(s), C18-C21 alkane(s), CisC19 alkane(s), hydrogenated farnesene, and / or their mixtures, preferably from linear or branched, saturated C13-C15 alkane(s), C18-C21 alkane(s), hydrogenated farnesene, and / or their mixtures.

6. The composition according to any of the preceding claims characterized in that the total concentration of one or more compound(s) according to group b) is in the range of 1 % to 20% by weight, preferably in the range of 2% to 15% by weight, more preferably in the range of 5% to 12% by weight, calculated to the total weight of composition A.

7. The composition according to any of the preceding claims characterized in that one or more compound(s) according to group c) are one or more disilicate(s), one or more metasilicate(s), one or more carbonate(s), one or more bicarbonate(s), and / or their mixtures, preferably said one or more compound(s) according to group c) is one or more disi licate(s) or one or more metasilicate(s), and / or their mixtures, and more preferably one or more compound(s) according to group c) is / are selected from sodium disilicate, sodium metasilicate, and / or their mixtures.

8. The composition according to any of the preceding claims characterized in that the total concentration of one or more compound(s) according to group c) is in the range of 1 % to 40% by weight, more preferably 5% to 35% by weight, still more preferably in the range of 10% to 35% by weight, still more preferably in the range of 10% to 30% by weight, still more preferably in the range of 15% to 30% by weight, calculated to the total weight of composition A.

9. The composition according to any of the preceding claims characterized in that composition A comprises one or more pulverulent excipients selected from organic / inorganic materials such as diatomaceous earth, cellulose, starch especially corn, tapioca, rice, wheat and potato, nylon powder, gypsum, sawdust and perlite, and more preferably the total concentration of said pulverulent excipients in composition A is in the range of 10% to 50% by weight, preferably 15% to 40% by weight, calculated to the total weight of composition A.

10. The composition according to any of the preceding claims characterized in that composition A further comprises one or more thickening polymer(s) according to group d), preferably the one or more compound(s) according to group d) are selected from non-ionic thickening polymers such as the cellulose-basedpolymers, like cellulose, cellulose gum, methylcellulose, hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxyethyl-methylcellulose, and alkylated hydroxyl celluloses such as (C2-C8)-alkylcelluloses or cetyl hydroxyethylcellulose, anionic thickening polymers such as the naturally-based anionic polymers and / or synthetic anionic polymers hypromellose, xanthan gum, dehydroxanthan gum, hydroxypropylxanthan gum, carboxymethyl cellulose, and starch-based polymers such as vegetable starch and / or their synthetically modified derivatives such as hydroxypropyl starch phosphate, or the alginic acids, sodium alginates, ammonium alginates, calcium alginates, gum arabic, and quar gum, preferably the one or more thickening polymers are cellulose, cellulose gum, carboxymethyl cellulose, xanthan gum and / or dehydroxanthan gum.11 .The composition according to claim 10 characterized in that the total concentration of one or more compound(s) according to group d) is in the range of 1 % to 10% by weight, preferably in the range of 3% to 7% by weight, calculated to the total weight of composition A.

12. A two-part bleaching and / or lightening composition for keratin fibers, preferably for human keratin fibers, more preferably human hair, wherein the first composition is composition A according to any of the claims 1 to 11 and the second composition B is an aqueous acidic composition comprising hydrogen peroxide having a pH in the range of 1 to 6.

13. Kit for keratin fibers, preferably for human keratin fibers, more preferably for human hair, comprising the compositions A and B as defined in any of the claims 1 to 11 and at least one further composition selected from:- an aqueous composition comprising one or more conditioning ingredients,- an aqueous composition comprising one or more oxidative dye(s) and / or direct dye(s),- an aqueous composition comprising one or more cleansing surfactant(s).

14. A ready-to-use bleaching and / or lightening composition for keratin fibers, preferably human hair, having a pH in the range of 9 to 11 comprising the following compound(s): a), b), c) as defined in any of the claims 1 to 11 , hydrogen peroxide.

5. Process for bleaching keratin fibers, preferably human keratin fibers, more preferably for human hair comprising the steps: i) optionally washing the hair with a cleansing composition and drying the hair, ii) mixing the bleaching and / or lightening composition A according to any of the claims 1 to 11 with the aqueous composition B as defined in claim 12 to prepare the ready-to-use composition as defined in the claim 14; then iii) applying the ready-to-use composition onto hair for period of 1 to 45 min, preferably 10 to 45 min, more preferably 25 to 45 min; then iv) rinsing off the hair with water or optionally washing with a cleansing composition; v) optionally drying the hair.

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