Bleaching powder and method for bleaching hair

Abstract

The presently claimed invention is directed to a bleaching powder comprising at least one saturated acyclic terpane, the saturated acyclic terpane having from 10 to 40 carbon atoms, at least one persulfate, and at least one silicate selected from the group consisting of alkali metal silicates, alkali metal metasilicates, and ammonium silicate.

Description

[Technical Field]

[0001] The presently claimed invention is directed to a bleaching powder comprising at least one saturated acyclic terpane, the saturated acyclic terpane having from 10 to 40 carbon atoms, at least one persulfate, and at least one silicate selected from the group consisting of alkali metal silicates, alkali metal metasilicates, and ammonium silicate. [Background technology]

[0002] Hair bleaching is an established technique in the hair cosmetics industry. Hair bleaching involves applying an oxidizing agent to hair for a period of time effective to achieve the desired light hair color. The oxidizing agent is typically a hydrogen peroxide solution at a concentration ranging from 6 to 12% by weight. Hydrogen peroxide is applied to hair under alkaline pH conditions, gradually lightening the hair tone by oxidizing the melanin that gives hair its color.

[0003] To enhance the lightening effect of the peroxide solution, a persulfate-based formulation can be incorporated as a "booster." Sodium, potassium, or ammonium persulfate salts are provided in powder form and mixed with the hydrogen peroxide solution before use. The mixed product is then applied to the hair for a period of time effective to achieve the desired light hair color.

[0004] Currently, hair bleaches are typically sold in two-component kits. One component contains an aqueous hydrogen peroxide composition, and the second component contains a powder bleaching composition, which contains persulfate and an alkaline agent. When combined, the two components act as accelerators for the bleaching process. This powder bleaching composition can be used alone to bleach hair, or in combination with an aqueous hydrogen peroxide composition. When combined, hydrogen peroxide and persulfate are highly reactive, forming hydrogen and sodium sulfide, plus nascent oxygen. The nascent oxygen greatly accelerates the oxidation and bleaching of melanin in hair.

[0005] Salts and other active ingredients are typically provided in the form of a powdered mixture that is then mixed with water or other liquid to form a paste. Powdered mixtures often have the disadvantage of being dusty. The oxidizing and alkaline agents in the powdered mixture can be harmful if ingested or inhaled, and hairdressers, in particular, can develop respiratory symptoms from multiple bleaching sessions due to the dusting of bleach powders. It is therefore desirable to have a hair bleach that does not cause this dusting.

[0006] Low-dust formulations have been developed to control or reduce dusting in powder bleaching media. Low-dust formulations generally involve mixing powder with at least one base oil, such as mineral oil, resulting in a cream-type formulation. These systems can become unstable due to separation of the oil and salt phases, and can become too waxy and cosmetically unappealing if the formulation separates prematurely. This separation also has the effect that different portions of powder taken from different locations within the same batch will have different chemical compositions and therefore produce different bleaching effects.

[0007] US Pat. No. 7,803,355 B2 discloses an anhydrous paste comprising at least one peroxygen salt and at least one polydecene.

[0008] US Patent No. 9,149,660 B2 describes a hair bleaching composition comprising a persulfate salt and an oil gel containing mineral oil, an ethylene / propylene / styrene copolymer, and a butylene / ethylene / styrene copolymer.

[0009] Hydrogen peroxide and persulfates are highly reactive when combined, forming nascent oxygen. This increased reactivity increases the effectiveness of the bleaching medium achieved by combining hydrogen peroxide and persulfates. However, this increased effectiveness can also result in increased damage to the hair fiber. The hair fiber can become weaker and more brittle, potentially resulting in breakage during a consumer's normal hair care routine.

[0010] US Patent Publication No. 2007 / 0169285 A1 describes that the presence of an oil phase can reduce damage to hair that occurs during bleaching.

[0011] Another performance area that is particularly important to consumers is the provision of a desired color finish and effective coverage of gray hair. Specifically, while the amount of gray hair that is colored varies considerably from consumer to consumer, the resulting overall appearance of colored hair that consumers desire should be approximately the same for naturally pigmented hair and for gray hair on the scalp, with the added requirement that initial coverage be maintained during post-coloring wash and dry cycles.

[0012] Thus, there is a need to provide stylists and consumers with a powdered bleaching composition that is non-dusty or very lightly dusty, stable, and can be formulated into a hair bleaching vehicle that provides consistent and effective coloring of the hair and gray coverage while reducing the level of damage to the hair.

[0013] It is therefore an object of the presently claimed invention to provide stylists and consumers with a bleach powder composition that is non-dusty or very lightly dusty, stable, and can be formulated into a hair bleaching vehicle to provide consistent and effective coloring of the hair and gray coverage while reducing the level of damage to the hair. Summary of the Invention

[0014] It has surprisingly been found that the addition of certain saturated acyclic terpanes having 10 to 40 carbon atoms to a bleaching powder composition comprising at least one persulfate and at least one basic silicate can be effectively formulated into a hair bleaching medium that provides effective coloring of the hair and gray coverage while preventing dusting of the bleaching powder composition as observed by hair stylists, thereby reducing the level of damage to the hair as evidenced by reduced combing force.

[0015] Accordingly, in one aspect, the presently claimed invention is directed to a bleaching powder comprising: (A) at least one saturated acyclic terpane, wherein the saturated acyclic terpane has from 10 to 40 carbon atoms and is selected from the group consisting of squalane, isosqualane, and neosqualane; (B) at least one persulfate; and (C) at least one silicate selected from the group consisting of alkali metal silicates, alkali metal metasilicates, and ammonium silicate.

[0016] In another aspect, the presently claimed invention is directed to a method for bleaching hair comprising at least the following steps: a) combining a bleaching powder as described herein with an aqueous medium to form a bleaching medium; b) applying a bleaching medium to the hair; c) allowing the bleaching medium to remain on the hair for at least 2 to 50 minutes; d) rinsing the bleaching medium from the hair; and e) Optionally, drying the bleached hair.

[0017] In yet another aspect, the presently claimed invention is directed to the use of at least one saturated acyclic terpane, which is a saturated acyclic terpane having 10 to 40 carbon atoms selected from the group consisting of squalane, isosqualane, and neosqualane, to reduce dusting of a bleaching powder comprising at least one persulfate salt and at least one silicate selected from the group consisting of alkali metal silicates, alkali metal metasilicates, and ammonium silicate.

[0018] Other objects, advantages and uses of the presently claimed invention will become apparent to those skilled in the art from the following detailed description of the invention. DETAILED DESCRIPTION OF THE INVENTION

[0019] The following detailed description is merely exemplary in nature and is not intended to limit the presently claimed invention or the application and uses of the presently claimed invention. Furthermore, there is no intention to be bound by any theory presented in the prior art technical field, background, abstract or the following detailed description.

[0020] As used herein, the terms "comprising," "comprises," and "comprised of" are synonymous with "including," "includes," or "containing," and "contains," and are inclusive or open-ended and do not exclude additional, unrecited elements, components, or method steps. As used herein, the terms "comprising," "comprises," and "comprised of" will be understood to include "consisting of," "consists," and "consists of."

[0021] Furthermore, terms such as "(a)," "(b)," "(c)," "(d)," etc. in the specification and claims are used to distinguish between similar elements and not necessarily to describe a sequential or chronological order. It is to be understood that terms so used are interchangeable under appropriate circumstances, and that embodiments of the subject matter described herein can operate in sequences other than those described or illustrated herein. When terms such as "(A)," "(B)," "(C)," or "(a)," "(b)," "(c)," "(d)," "(i)," "(ii)," etc., refer to steps of a method, use, or assay, there is no consistency of time or time interval between the steps. That is, steps may be performed simultaneously, or there may be a time interval of seconds, minutes, hours, days, weeks, months, or years between such steps, unless otherwise stated in the application, as herein above or below.

[0022] The term "about," when used in connection with a weight ratio or weight percentage, should be understood to mean a range of ±10% for the particular value. For example, about 1% weight percentage of a compound means a weight percentage ranging from 0.9 to 1.1%. For example, about 2.5% weight percentage of a compound means a weight percentage ranging from 2.25 to 2.75%.

[0023] In the following, various aspects of the subject matter are defined in more detail. Each aspect so defined may be combined with other aspects, unless expressly stated to the contrary. In particular, any feature indicated as being preferred or advantageous may be combined with any one or more other features indicated as being preferred or advantageous.

[0024] References throughout this specification to "one embodiment" or "a preferred embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the presently claimed invention. Thus, the appearances of the phrase "in one embodiment" or "in a preferred embodiment" in various places throughout this specification do not necessarily all refer to the same embodiment, but may refer to different embodiments of the presently claimed invention. Furthermore, features, structures, or characteristics may be combined in any suitable manner in one or more embodiments, as would be apparent to one of ordinary skill in the art from this disclosure. Some embodiments described herein include some features but not other features included in other embodiments. As will be understood by one of ordinary skill in the art, combinations of features from different embodiments are intended to form different embodiments within the scope of the subject matter. For example, in the appended claims, any of the claimed embodiments may be used in any combination.

[0025] Additionally, ranges defined throughout this specification are inclusive, i.e., a range of 1 to 10 means that both 1 and 10 are included in the range. For the avoidance of doubt, applicants reserve the right to obtain equivalents pursuant to applicable law.

[0026] For purposes of the presently claimed invention, "weight percent" or "wt.%" as used in the presently claimed invention is based on the total weight of the bleach powder (wt / wt). Furthermore, the sum of the wt.% of all compounds as described herein in each component equals 100 wt.%.

[0027] All documents cited herein, including cross-references or related patents or applications, are incorporated herein by reference in their entirety unless expressly excluded or otherwise limited. The citation of any document is not an admission that the document is prior art with respect to any invention disclosed or claimed herein, or that the document alone, or in combination with one or more other cited documents, teaches, suggests, or discloses such invention. Furthermore, if a meaning or definition of a term in this specification conflicts with a meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this specification shall control.

[0028] The measurement techniques described above and elsewhere herein are well known to those skilled in the art and, therefore, are not limitations on the presently claimed invention.

[0029] "User" or "consumer" means the person preparing the hair treatment composition. The user may be a professional hairstylist working in a salon, for example, and may be different from the person to whom the composition is applied, or the user may be the same person to whose hair the composition is applied. Mixing may occur in a bowl or bottle, or via a mixer placed between the individual compositions stored and the point at which they are dispensed and used. Two-part bleach powders are most commonly found on the market, although three- or more-part bleaches are also available.

[0030] "Lift" (or "lift power") refers to the amount of lightening caused by bleaching of the natural hair pigment melanin by using the bleaching powder of the presently claimed invention. The amount of lift provided by different hair treatment compositions can be compared by using naturally dark human hair samples (e.g., dark hair from individuals of Chinese descent) and measuring the color change achieved after application of the compositions. Color change can be measured using well-known parameters such as L*a*b* values. One composition is said to provide more lift than another by the resulting L* value or so-called dL* value (L*a*b*), measured for a given treated sample of dark hair using the same experimental conditions. final -L* initialで The designations Level 2 (used herein interchangeably with "semi-permanent" or "tone-on-tone") and Level 3 (used herein interchangeably with "permanent") are commonly used in the hair color industry to distinguish between compositions with medium and high lift.

[0031] In embodiments of the presently claimed invention, the following materials are used: The presently claimed invention is described in non-limiting embodiments: The listed components are preferred features and other preferred but non-limiting features of the presently claimed invention.

[0032] The measurement techniques described above and herein are well known to those skilled in the art and, therefore, are not limitations of the presently claimed invention.

[0033] In one aspect, the presently claimed invention is directed to a bleaching powder comprising: (A) at least one saturated acyclic terpane, the saturated acyclic terpane having from 10 to 40 carbon atoms; (B) at least one persulfate salt; and (C) at least one silicate selected from the group consisting of alkali metal silicates, alkali metal metasilicates, and ammonium silicate.

[0034] In one embodiment, the at least one saturated acyclic terpane (A) is a monoterpane, sesquiterpane, diterpane, sesterterpane, triterpane, or tetraterpane. In another embodiment, the at least one saturated acyclic terpane (A) is selected from the group consisting of 2,6-dimethyloctane, 2,6,10,15,19-pentamethylleicosane, farnesane, phytane, squalane, isosqualane, neosqualane, and lycopane. In yet another embodiment, the at least one saturated acyclic terpane (A) is selected from the group consisting of squalane, isosqualane, and neosqualane, and preferably, the at least one saturated acyclic terpane (A) is squalane.

[0035] As used herein, "squalane" refers to an oil, also known as 2,6,10,15,19,23-hexamethyltetracosane. In one embodiment, squalane is synthetic squalane obtained by chemical synthesis, or semi-synthetic squalane obtained by reduction of naturally occurring squalene. Squalene is found in deep-sea fish such as sharks, or in olive oil, rice bran oil, wheat germ oil, sesame oil, and cottonseed oil. Squalane can also be obtained from sugarcane.

[0036] In a preferred embodiment, the bleach powder comprises bio-based farnesene-derived squalane, or bio-based farnesene-derived squalane, isosqualane, and neosqualane, i.e., squalane, isosqualane, and neosqualane produced from bio-based farnesene by catalytic reaction, chemical reaction, thermal reaction, hydrogenation, or any combination thereof.

[0037] As used herein, the term "bio-based farnesene" refers to farnesene that is biologically produced from a microorganism, particularly a genetically modified microorganism, by fermentation of a renewable carbon source, such as sugar. As used herein, "farnesene" refers to α-farnesene, β-farnesene, or a mixture thereof. α-Farnesene is any of the following: This refers to a compound having the structure TIFF2025539601000001.tif19170, its stereoisomers, or a mixture of its stereoisomers.

[0038] β-Farnesene is: This refers to a compound having the structure TIFF2025539601000002.tif21170, its stereoisomers, or mixtures thereof.

[0039] In one embodiment, the β-farnesene is a substantially pure stereoisomer of β-farnesene. In another embodiment, the β-farnesene comprises a mixture of stereoisomers, such as cis-trans isomers. In another embodiment, the amount of each stereoisomer in the β-farnesene mixture is preferably in the range of ≧0.1 wt.% to ≦99.9 wt.%, more preferably ≧1.0 wt.% to ≦99.0 wt.%, even more preferably ≧5.0 wt.% to ≦95.0 wt.%, even more preferably ≧10 wt.% to ≦90 wt.%, and most preferably ≧20 wt.% to ≦80 wt.%, based on the total weight of the β-farnesene mixture.

[0040] In one embodiment, the at least one saturated acyclic terpane (A) has a degree of branching of 2, 3, 4, 5, 6 or 8, preferably the at least one saturated acyclic terpane (A) has a degree of branching of 6.

[0041] In yet another embodiment, the at least one component (A) is present in an amount, based on the total weight of the bleach powder, preferably in the range of ≧0.5 wt.% to ≦15.0 wt.%, more preferably in the range of ≧1.0 wt.% to ≦14.0 wt.%, even more preferably in the range of ≧2.0 wt.% to ≦13.0 wt.%, and even more preferably in the range of ≧2.0 wt.% to ≦10.0 wt.%, most preferably in the range of ≧2.0 wt.% to ≦8.0 wt.%, and especially in the range of ≧2.0 wt.% to ≦5.0 wt.%.

[0042] In one embodiment, the bleach powder is substantially free of saturated acyclic terpanes, which are saturated acyclic terpanes having 10 to 40 carbon atoms other than squalane, isosqualane, and neosqualane. The term "substantially free" means that the bleach powder contains 0.1% or less, preferably 0.01% or less, and more preferably 0% of the compound, based on the total weight of the bleach powder.

[0043] The bleaching powder comprises at least one persulfate (B). In one embodiment, the at least one persulfate (B) is selected from the group consisting of alkaline earth metal persulfates, alkali metal persulfates, and ammonium persulfates, which exhibit oxidizing activity, i.e., the ability to generate active oxygen, when combined with an aqueous composition containing hydrogen peroxide. Examples of alkali metal persulfates include lithium persulfate, sodium persulfate, and cesium persulfate. Examples of alkaline earth metal salts include magnesium persulfate and calcium persulfate. In one embodiment, the at least one persulfate (B) is preferably selected from the group consisting of ammonium persulfate, sodium persulfate, and potassium persulfate. The persulfate is generally present in the form of fine particles, the particle size of which is in the range of ≧0.1 μm to ≦200 μm.

[0044] In one embodiment, the at least one component (B) is present in an amount preferably in the range of ≥ 20 wt.% to ≤ 70 wt.%, more preferably in the range of ≥ 25 wt.% to ≤ 65 wt.%, and even more preferably in the range of ≥ 40 wt.% to ≤ 60 wt.%, based on the total weight of the bleach powder.

[0045] In one embodiment, the bleaching powder comprises at least one silicate (C) that is sodium silicate. In another embodiment, the at least one component (C) is present in an amount in the range of ≧10 wt.% to ≦40 wt.%, preferably in the range of ≧15 wt.% to ≦35 wt.%, and more preferably in the range of ≧20 wt.% to ≦32 wt.%, based on the total weight of the bleaching powder. Sodium silicate is an alkali salt that provides an aqueous, basic pH when the bleaching powder according to the presently claimed invention is combined with an aqueous medium.

[0046] Because persulfates and hydrogen peroxide are relatively stable in acidic media, they may need to be activated at a basic pH to obtain a suitable formulation. Therefore, it is common to add alkaline alkali metal silicates and / or ammonium silicates to bleach powders. The basic pH is an activating factor that allows oxidation by oxidizing agents such as hydrogen peroxide in combination with persulfates.

[0047] In one embodiment, bleaching powders according to the presently claimed invention preferably comprise at least one additive (D) selected from the group consisting of a source of carbonate or bicarbonate or carbamate ions, an aluminosilicate, an anionic surfactant, a chelating agent, a thickener, a filler, an amino acid, a hydrolyzed protein, a C3-C20 monocarboxylic acid, and a C3-C10 di- or tricarboxylic acid. In another embodiment, the at least one additive (D) is preferably present in an amount ranging from ≥ 5.0 wt. % to ≤ 30 wt. %, more preferably from ≥ 7.0 wt. % to ≤ 25 wt. %, even more preferably from ≥ 10.0 wt. % to ≤ 22 wt. %, and even more preferably from ≥ 11 wt. % to ≤ 21 wt. %, and most preferably from ≥ 12 wt. % to ≤ 20 wt. %, especially from ≥ 13 wt. % to ≤ 20 wt. %, based on the total weight of the bleaching powder.

[0048] In one embodiment, the source of carbonate, bicarbonate, or carbamate ions is preferably selected from the group consisting of sodium, potassium, guanidine, arginine, lithium, calcium, magnesium, barium, and ammonium salts of carbonate, carbamate, and bicarbonate ions. In another embodiment, the at least one source of carbonate, bicarbonate, or carbamate ions is preferably present in an amount ranging from ≥ 5.0 wt. % to ≤ 20 wt. %, more preferably from ≥ 7.0 wt. % to ≤ 15 wt. %, and even more preferably from ≥ 8.0 wt. % to ≤ 12 wt. %, based on the total weight of the bleaching powder. The source of carbonate, bicarbonate, or carbamate ions is a solid alkali salt that provides an aqueous, basic pH when the bleaching powder is combined with an aqueous medium.

[0049] In one embodiment, the aluminosilicate is preferably sodium aluminosilicate. In another embodiment, the aluminosilicate is present in an amount preferably in the range of ≥ 10.0 wt.% to ≤ 35 wt.%, more preferably in the range of ≥ 12 wt.% to ≤ 30 wt.%, and even more preferably in the range of ≥ 15 wt.% to ≤ 25 wt.%, based on the total weight of the bleach powder.

[0050] In one embodiment, bleaching powders according to the presently claimed invention preferably comprise an anionic surfactant selected from the group consisting of salts (such as alkali salts, e.g., sodium, ammonium, amine, amino alcohol, and magnesium salts) of the following compounds: alkyl sulfates, alkyl ether sulfates, alkyl amido ether sulfates, alkyl aryl polyether sulfates, monoglyceride sulfates; alkyl sulfonates, alkyl phosphates, alkyl amido sulfonates, alkyl aryl sulfonates, α-olefin sulfonates, paraffin sulfonates; alkyl sulfosuccinates, alkyl ether sulfosuccinates, alkyl amido sulfosuccinates; alkyl sulfosuccinamates; alkyl sulfoacetates; alkyl ether phosphates; acyl sarcosinates; acyl isethionates; N-acyltaurates; and mixtures thereof. The alkyl or acyl radicals of all of these various compounds contain, for example, 8 to 24 carbon atoms, and the aryl radical is selected, for example, from phenyl and benzyl. Weak anionic surfactants may also be used, such as alkyl-D-galactosiduronic acids and their salts, and polyoxyalkylenated (C6-C24) alkyl ether carboxylic acids, polyoxyalkylenated (C6-C24) alkylaryl ether carboxylic acids, polyoxyalkylenated (C6-C24) alkylamido ether carboxylic acids and their salts, for example, those containing 2 to 50 ethylene oxide groups, as well as mixtures thereof. Anionic derivatives of polysaccharides may also be used, such as carboxyalkyl ethers of alkyl polyglucosides.

[0051] In one embodiment, bleaching powders according to the presently claimed invention comprise an anionic surfactant preferably selected from the group consisting of alkali and alkaline earth metal salts of laurate, myristate, palmitate, stearate, or behenate, and more preferably the anionic surfactant is selected from the group consisting of sodium and potassium salts of laurate, palmitate, or stearate. In one embodiment, the anionic surfactant is preferably present in an amount within the range of ≥ 2.0 wt. % to ≤ 9.0 wt. %, more preferably within the range of ≥ 3.0 wt. % to ≤ 8.0 wt. %, and even more preferably within the range of ≥ 4.0 wt. % to ≤ 7.0 wt. %, based on the total weight of the bleaching powder.

[0052] In one embodiment, the bleaching powder preferably comprises an additional surfactant selected from the group consisting of nonionic surfactants, amphoteric or zwitterionic surfactants, and cationic surfactants.

[0053] In one embodiment, the nonionic surfactant is selected from the group consisting of fatty alcohol polyglycol ethers, alkylphenol polyglycol ethers, fatty acid polyglycol esters, fatty acid amide polyglycol ethers, fatty amine polyglycol ethers, alkoxylated triglycerides, optionally partially oxidized alk(en)yl oligoglycosides or glucuronic acid derivatives, fatty acid N-alkylglucamides, protein hydrolysates (especially wheat-based vegetable products), polyol fatty acid esters, sugar esters, sorbitan esters, polysorbates and amine oxides.

[0054] Zwitterionic surfactants contain at least one quaternary ammonium group and at least one -COO group in the molecule. (-) or -SO3 (-)and surfactants containing the group ##STR1## Particularly suitable zwitterionic surfactants are so-called betaines, such as N-alkyl-N,N-dimethylammonium glycinates (e.g., cocoalkyldimethylammonium glycinate), N-acylaminopropyl-N,N-dimethylammonium glycinates (e.g., cocoacylaminopropyldimethylammonium glycinate), and 2-alkyl-3-carboxymethyl-3-hydroxyethylimidazolines (containing 8 to 18 carbon atoms in the alkyl or acyl group), and cocoacylaminoethyl hydroxyethyl carboxymethyl glycinate.

[0055] Amphoteric surfactants are surface-active compounds that contain at least one free amino group and at least one -COOH or -SO3H group in the molecule, in addition to a C8 to C18 alkyl or acyl group, and are capable of forming inner salts. Examples of suitable amphoteric surfactants are N-alkylglycines, N-alkylpropionic acids, N-alkylaminobutyric acids, N-alkyliminodipropionic acids, N-hydroxyethyl-N-alkylamidopropylglycines, N-alkyltaurines, N-alkylsarcosines, 2-alkylaminopropionic acids, and alkylaminoacetic acids containing about 8 to 18 carbon atoms in the alkyl group.

[0056] Particularly suitable cationic surfactants are quaternary ammonium compounds, preferably ammonium halides, more particularly chlorides and bromides, such as alkyltrimethylammonium chloride, dialkyldimethylammonium chloride and trialkylmethylammonium chloride, for example cetyltrimethylammonium chloride, stearyltrimethylethylammonium chloride, distearyldimethylammonium chloride, lauryldimethylammonium chloride, lauryldimethylbenzylammonium chloride and tricetylmethylammonium chloride.

[0057] Hydrogen peroxide is susceptible to decomposition and quickly becomes ineffective when it comes into contact with heavy metals such as iron, copper and manganese, a drawback that is usually overcome by including a chelating agent in the formulation. In one embodiment, the bleaching powder comprises a chelating agent, preferably ethylenediaminetetraacetic acid (EDTA), ethylenediamine-N,N'-disuccinic acid (EDDS), ethylenediamine-N,N'-diglutaric acid (EDDG), 2-hydroxypropylenediamine-N,N'-disuccinic acid (HPDDS), N,N-dicarboxymethylglutamic acid (GLDA), glycinamide-N,N'-disuccinic acid (GADS), ethylenediamine-N,N'-bis(ortho-hydroxyphenylacetic acid) (EDDHA), dimethylglucamine (DMG), N-(1-carboxyethyl)iminodiacetic acid, methylglycine N,N-diacetic acid, diethylenetriaminepentaacetic acid (DTPA), ethylenedicystic acid (EDC), N,N'-bis(2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid (HBED), ethylenediamine-N ... The chelating agent is preferably selected from the group consisting of diamine tri(methylene phosphonate), tetramethylethylenediamine (TMEDA), N,N,N',N'-tetraethylethylenediamine (TEEDA), and salts thereof. More preferably, the chelating agent is selected from the group consisting of ethylenediaminetetraacetic acid (EDTA), ethylenediamine-N,N'-disuccinic acid (EDDS), and salts thereof. The term "salt thereof," in the context of a chelating agent, refers to all salts containing the same functional structure as the chelating agent it refers to, including alkali metal salts, alkaline earth salts, ammonium salts, substituted ammonium salts, and mixtures thereof, or sodium salts, potassium salts, calcium salts, magnesium salts, ammonium salts, and mixtures thereof, or monoethanolammonium salts, diethanolammonium salts, triethanolammonium salts, and mixtures thereof.

[0058] In one embodiment, the chelating agent is preferably present in an amount in the range of ≥ 0.4 wt.% to ≤ 3.0 wt.%, more preferably in the range of ≥ 0.5 wt.% to ≤ 2.0 wt.%, and even more preferably in the range of ≥ 0.7 wt.% to ≤ 1.5 wt.%, based on the total weight of the bleach powder.

[0059] Bleaching powders according to the presently claimed invention preferably include at least one thickening agent. The thickening agent is typically water-soluble and provides the bleaching medium with a desirable semi-fluid to paste-like consistency. Typical thickening agents include, but are not limited to, synthetic and naturally occurring water-soluble polymers. In one embodiment, bleaching powders according to the presently claimed invention preferably include a thickening agent selected from the group consisting of cellulose derivatives, polyacrylic acid, acrylate copolymers, polysaccharide gums, xanthan gum, starch, guar, starch derivatives, alginic acid, and acrylate-diallyldimethylammonium polymers, more preferably selected from the group consisting of xanthan gum, starch, and alginic acid.

[0060] Exemplary embodiments of water-soluble synthetic polymeric thickeners include polyvinylpyrrolidone, polyacrylic acid, polyacrylamide, non-crosslinked poly-2-acrylamidopropanesulfonic acid, acid-crosslinked poly-2-acrylamido-2-methylpropanesulfonic acid, and crosslinked poly-2-acrylamido-2-methylpropanesulfonic acid partially neutralized with ammonia. Further exemplary embodiments of water-soluble synthetic thickeners include non-crosslinked poly-2-acrylamido-2-methylpropanesulfonic acid in combination with hydroxyalkyl cellulose ethers or poly(ethylene oxide). Embodiments of naturally derived water-soluble thickeners include, but are not limited to, polymers containing at least one sugar unit. Exemplary embodiments of naturally derived thickeners include, but are not limited to, nonionic guar gum modified with C1-C6 hydroxyl alkyl groups, semi-synthetic guar gum, microbially derived biopolysaccharide gums such as scleroglucan or xanthan gum, gums derived from plant exudates such as gum arabic, gum ghatti, gum karaya, gum tragacanth, carrageenan gum, agar gum, and carob gum, pectin, alginates, starches including rice starch, corn starch, potato starch, rapeseed starch, cassava starch, and their hydrolyzed derivatives, hydroxyalkyl (C1-C6) celluloses, and carboxyalkyl (C1-C6) celluloses. Exemplary embodiments of water-soluble cellulose thickeners include, but are not limited to, hydroxyalkyl (C1-C6) celluloses, such as hydroxyethyl cellulose.

[0061] In one embodiment, the thickener is present in an amount preferably in the range of ≥ 2.0 wt.% to ≤ 10.0 wt.%, more preferably in the range of ≥ 3.5 wt.% to ≤ 8.0 wt.%, and even more preferably in the range of ≥ 4.0 wt.% to ≤ 6.0 wt.%, based on the total weight of the bleach powder.

[0062] In one embodiment, a bleaching powder according to the presently claimed invention comprises a filler selected from the group consisting of kaolin clay, smectite clay, and sepiolite clay. In one embodiment, the filler is preferably present in an amount in the range of ≥ 2.0 wt.% to ≤ 10.0 wt.%, more preferably ≥ 3.5 wt.% to ≤ 8.0 wt.%, and even more preferably ≥ 4.0 wt.% to ≤ 6.0 wt.%, based on the total weight of the bleaching powder.

[0063] In one embodiment, the bleaching powder preferably contains at least one amino acid selected from the group consisting of alanine, glycine, phenylalanine, leucine, valine, isoleucine, glutamic acid, aspartic acid, citrulline, histidine, arginine, lysine, and tyrosine; more preferably, at least one amino acid selected from the group consisting of alanine, glycine, valine, and arginine; most preferably, the at least one amino acid is alanine, glycine, valine, or arginine. In a preferred embodiment, the bleaching powder contains no other amino acids. The at least one amino acid present in the bleaching powder of the presently claimed invention is oxidatively stable in the bleaching medium, i.e., the at least one amino acid is not oxidized or is only very slightly oxidized in the bleaching medium by one of nucleophilic oxidation, electrophilic oxidation, or radical oxidation. In one embodiment, the at least one amino acid is preferably obtained from a natural source, more preferably, the at least one amino acid is obtained from a plant source. In one embodiment, the amino acid is present in an amount, based on the total weight of the bleach powder, preferably in the range of ≧0.05 wt.% to ≦2.0 wt.%, more preferably in the range of ≧0.1 wt.% to ≦1.5 wt.%, even more preferably in the range of ≧0.1 wt.% to ≦1.3 wt.%, and even more preferably in the range of ≧0.1 wt.% to ≦1.0 wt.%.

[0064] In one embodiment, the bleaching powder preferably comprises hydrolyzed proteins selected from the group consisting of hydrolyzed keratin and hydrolyzed vegetable protein. Hydrolyzed proteins are commercially available, for example, AC Vegan Keratin OS, Nutrilan® Keratin LM, Gluadin® Kera-P LM, KeraMatch® V, FK Repair Ultra, FK Restore, FK Protect Plus, and ProSina TM etc.

[0065] In one embodiment, bleaching powders according to the presently claimed invention preferably comprise a C3-C20 monocarboxylic acid selected from the group consisting of propionic acid, butyric acid, pentanoic acid, iso-pentanoic acid, hexanoic acid, iso-hexanoic acid, heptanoic acid, iso-heptanoic acid, octanoic acid, iso-octanoic acid, nonanoic acid, iso-nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, palmitic acid, heptadecanoic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, nonadecanoic acid, and eicosanoic acid. In one embodiment, the C3-C20 monocarboxylic acid is present in an amount, based on the total weight of the bleach powder, preferably in the range of ≥ 0.05 wt.% to ≤ 2.0 wt.%, more preferably in the range of ≥ 0.1 wt.% to ≤ 1.5 wt.%, even more preferably in the range of ≥ 0.1 wt.% to ≤ 1.3 wt.%, and even more preferably in the range of ≥ 0.1 wt.% to ≤ 1.0 wt.%.

[0066] In one embodiment, bleaching powders according to the presently claimed invention comprise a C3-C10 dicarboxylic or tricarboxylic acid, preferably selected from the group consisting of tartronic acid, succinic acid, malic acid, maleic acid, citric acid, tartaric acid, adipic acid, glutaric acid, oxalic acid, sebacic acid, glyoxylic acid, malonic acid, and hydroxyglutaric acid. In one embodiment, the C3-C10 dicarboxylic or tricarboxylic acid is preferably present in an amount in the range of ≧0.05 wt.% to ≦2.0 wt.%, more preferably ≧0.1 wt.% to ≦1.5 wt.%, even more preferably ≧0.1 wt.% to ≦1.3 wt.%, and even more preferably ≧0.1 wt.% to ≦1.0 wt.%, based on the total weight of the bleaching powder.

[0067] In one embodiment, the bleaching powder according to the presently claimed invention comprises: (A) ≥ 2.0 wt.% to ≤ 5.0 wt.% squalane; (B) ≥ 40 wt.% to ≤ 60 wt.% of at least one persulfate; (C) ≥ 20 wt.% to ≤ 32 wt.% sodium silicate, and (D) ≧12 wt.% to ≦25 wt.% of at least one additive selected from the group consisting of a source of carbonate ions or bicarbonate ions or carbamate ions, aluminosilicates, anionic surfactants, chelating agents, thickeners, fillers, amino acids, hydrolyzed proteins, C3-C20 monocarboxylic acids, and C3-C10 di- or tricarboxylic acids. Includes:

[0068] In one embodiment, the bleach powder of the presently claimed invention is prepared by dispersing, preferably under mechanical action, all compounds present in particulate form, i.e., at least one persulfate (B) and at least one silicate (C), in at least one saturated acyclic terpane (A), which is a saturated acyclic terpane having from 10 to 40 carbon atoms, in which the other liquid components of the bleach powder have been predispersed or premixed.

[0069] In another embodiment, the bleach powder of the presently claimed invention is prepared by extrusion, preferably using a co-rotating twin screw system including a conveying means and a mixing means, by introducing the liquid and solid phases of the bleach powder into an extruder and then mixing all components at a temperature of ≦25° C.

[0070] The bleaching powder according to the presently claimed invention is used in combination with an oxygen donor, such as hydrogen peroxide, to bleach hair. Thus, in another aspect, the presently claimed invention is directed to a method for bleaching hair comprising at least the following steps: a) combining a bleaching powder as described herein with an aqueous medium to form a bleaching medium; b) applying a dry or wet bleaching medium to the hair; c) allowing the bleaching medium to remain on the hair for at least 2 to 50 minutes; d) rinsing the bleaching medium from the hair; and e) Optionally, drying the bleached hair.

[0071] The bleaching medium is preferably applied in the air using any number of application devices, with the primary objective being to achieve a small, dense deposition of the bleaching medium on the hair to achieve the desired bleaching results.

[0072] In one embodiment, the aqueous medium preferably contains hydrogen peroxide. In step a), the bleaching powder is mixed with 0.5 to 10 weight equivalents of an aqueous medium, which may be a solution, emulsion, or gel, preferably containing ≥ 2.0 wt. % to ≤ 12.0 wt. % hydrogen peroxide, based on the total weight of the aqueous medium. This combination is preferably performed immediately before applying the bleaching medium to the hair.

[0073] In one embodiment, the pH of the aqueous medium is ≦7.0. The acidic pH ensures the stability of hydrogen peroxide in the aqueous medium. The pH is preferably obtained by adding at least one acidifying agent selected from the group consisting of hydrochloric acid, acetic acid, phosphoric acid, lactic acid, and boric acid. The aqueous medium preferably contains at least one adjuvant selected from the group consisting of preservatives, colorants, fragrances, antifoaming agents, hydrogen peroxide stabilizers, and chelating agents such as EDTA and EDDS.

[0074] In one aspect, the presently claimed invention is directed to the use of at least one saturated acyclic terpane, which is a saturated acyclic terpane having 10 to 40 carbon atoms, to reduce dusting of a bleach powder comprising at least one persulfate salt and at least one silicate selected from the group consisting of alkali metal silicates, alkali metal metasilicates, and ammonium silicate. In one embodiment, the saturated acyclic terpane having 10 to 40 carbon atoms is preferably squalane.

[0075] Oxidative haircolor compositions are typically sold in the form of a kit containing individually packaged components, such as separate containers, for example, a dye or shade component including a dye coupler and precursor, an aqueous hydrogen peroxide component, and a bleach powder including an alkalizing agent and a persulfate. Accordingly, in another aspect, the presently claimed invention is also directed to a kit including: i) an individually packaged oxidizing component including hydrogen peroxide; ii) an individually packaged coloring component including at least one dye coupler and at least one dye precursor; and iii) an individually packaged bleach powder as described herein.

[0076] In one embodiment, the dye precursor is selected from the group consisting of toluene-2,5-diamine, p-phenylenediamine, n-phenyl-p-phenylenediamine, N,N-bis(2-hydroxyethyl)-p-phenylenediamine, hydroxyethyl-p-phenylenediamine sulfate, hydroxypropyl bis(n-hydroxyethyl-p-phenylenediamine), 2-methoxymethyl-p-phenylenediamine, 2-chloro-p-phenylenediamine, p-aminophenol, p-methylaminophenol, 4-amino-m-cresol, 6-amino-m-cresol, bis(5-amino-2-hydroxyphenyl)methane, tetraaminopyrimidine, 2,5,6-triamino-4-pyrimidinol, 4,5-diamino-1-(2-hydroxyethyl)pyrazole, 2,3-diaminodihydroxypyrazolopyrazolone dimethosulfonate, 4,5-diamino-1-hexylpyrazole, hydroxypropyl-p-phenylenediamine, and dimethylpiperazinium. Preferably, the oxidation primary dye precursor is selected from the group consisting of toluene-2,5-diamine, 4,5-diamino-1-hexylpyrazole, N,N-bis(2-hydroxyethyl)-p-phenylenediamine, hydroxypropyl-p-phenylenediamine, 2-methoxymethyl-p-phenylenediamine, and salts thereof.

[0077] In one embodiment, the dye coupler is selected from the group consisting of resorcinol, 4-chlororesorcinol, 2-chlororesorcinol, 2-methylresorcinol, m-aminophenol, 4-amino-2-hydroxytoluene, 2-methyl-5-hydroxyethylaminophenol, 3-amino-2,6-dimethylphenol, 3-amino-2,4-dichlorophenol, 5-amino-6-chloro-o-cresol, 5-amino-4-chloro-o-cresol, hydroxybenzomorpholine, 2-amino-5-ethylphenol, 6-amino- m-cresol, 6-amino-o-cresol, 2,4-diaminophenoxyethanol, 2-amino-4-hydroxyethylaminoanisole, 1,3-bis-(2,4-diaminophenoxy)propane, 2,6-dihydroxyethylaminotoluene μ, m-phenylenediamine, 2,4-diamino-1,5-di(2-hydroxyethoxybenzene), 1-naphthol, 2-methyl-1-naphthol, 1,5-naphthalenediol, 2,7-naphthalenediol, 1-acetoxy-2-methylnaphthalene, 2,6-dihydro hydroxy-3,4-dimethylpyridine, 2,6-dimethoxy-3,5-pyridinediamine, 3-amino-6-methoxy-2-(methylamino)-pyridine, 2-amino-3-hydroxypyridine, 2,6-diaminopyridine, dihydroxyindole, 6-hydroxyindole, dihydroxyindoline, phenylmethylpyrazolone, 1,2,4-trihydroxybenzene, 5-((2-hydroxyethyl)amino)-1,3-benzodioxole, isatin, hydroquinone, 4-formyl-1-methylquinolinium-p-thionyl Preferably, the oxidation coupler dye precursor is selected from the group consisting of resorcinol, 2-methylresorcinol, 4-chlororesorcinol, 2-chlororesorcinol, m-aminophenol, hydroxybenzomorpholine, 2,4-diaminophenoxyethanol, 4-amino-2-hydroxytoluene, 2-methyl-5-hydroxyethylaminophenol, 5-((2-hydroxyethyl)amino)-1,3-benzodioxol, and salts thereof.

[0078] The presently claimed invention relates to one or more of the following advantages: ·Bleach powder is less powdery when applied by a hairstylist. The bleach powder is mixed into a stable hair bleaching medium that does not or has little phase separation, allowing for better application to the consumer's hair. The bleach powder is formulated in a hair bleaching medium that effectively colors the hair and also effectively covers grey hair. Bleach powder is formulated as a hair bleaching medium to reduce the level of hair damage caused during the hair bleaching process.

[0079] Below, a list of embodiments is provided to further illustrate the present disclosure, without intending to limit the disclosure to the specific embodiments listed below.

[0080] Implementation Embodiment 1. (A) at least one saturated acyclic terpane, which is a saturated acyclic terpane having 10 to 40 carbon atoms; (B) at least one persulfate; (C) at least one silicate selected from the group consisting of alkali metal silicates, alkali metal metasilicates, and ammonium silicate; Contains bleach powder.

[0081] Embodiment 2. The bleach powder of embodiment 1, wherein the at least one saturated acyclic terpane (A) is a monoterpane, sesquiterpane, diterpane, sesterterpane, triterpane, or tetraterpane.

[0082] Embodiment 3. The bleaching powder of embodiment 1, wherein the at least one saturated acyclic terpane (A) is selected from the group consisting of 2,6-dimethyloctane, 2,6,10,15,19-pentamethylleicosane, farnesane, phytane, squalane, isosqualane, neosqualane, and lycopane.

[0083] Embodiment 4. A bleaching powder according to embodiment 3, wherein the at least one saturated acyclic terpane (A) is selected from the group consisting of squalane, isosqualane, and neosqualane.

[0084] Embodiment 5. A bleach powder according to embodiment 1, wherein the at least one saturated acyclic terpane (A) has a branching degree of 2, 3, 4, 5, 6 or 8.

[0085] Embodiment 6. A bleach powder according to embodiment 5, wherein at least one saturated acyclic terpane (A) has a branching degree of 6.

[0086] Embodiment 7. The bleach powder of any one of embodiments 1 to 6, wherein at least one saturated acyclic terpane (A) is derived from a biobased compound.

[0087] Embodiment 8. The bleach powder of embodiment 7, wherein the bio-based compound is selected from the group consisting of squalene and farnesene.

[0088] Embodiment 9. A bleaching powder according to any one of embodiments 1 to 8, wherein the at least one component (A) is present in an amount ranging from 0.5 wt.% to ≦15.0 wt.%, preferably from ≧1.0 wt.% to ≦14.0 wt.%, more preferably from ≧2.0 wt.% to ≦13.0 wt.%, even more preferably from ≧2.0 wt.% to ≦10.0 wt.%, most preferably from ≧2.0 wt.% to ≦8.0 wt.%, in particular from ≧2.0 wt.% to ≦5.0 wt.%, based on the total weight of the bleaching powder.

[0089] Embodiment 10. The bleaching powder of any one of embodiments 1 to 9, wherein the at least one persulfate (B) is selected from the group consisting of ammonium persulfate, sodium persulfate, and potassium persulfate.

[0090] Embodiment 11. A bleaching powder according to any one of embodiments 1 to 10, wherein at least one component (B) is present in an amount ranging from ≥ 20 wt.% to ≤ 70 wt.%, preferably from ≥ 25 wt.% to ≤ 65 wt.%, more preferably from ≥ 40 wt.% to ≤ 60 wt.%, based on the total weight of the bleaching powder.

[0091] Embodiment 12. A bleaching powder according to any one of embodiments 1 to 11, wherein the at least one silicate (C) is sodium silicate.

[0092] Embodiment 13. A bleaching powder according to any one of embodiments 1 to 12, wherein at least one component (C) is present in an amount ranging from ≥ 10 wt.% to ≤ 40 wt.%, preferably from ≥ 15 wt.% to ≤ 35 wt.%, more preferably from ≥ 20 wt.% to ≤ 32 wt.%, based on the total weight of the bleaching powder.

[0093] Embodiment 14. The bleaching powder of any one of embodiments 1 to 13, further comprising at least one additive (D) selected from the group consisting of a source of carbonate ions, bicarbonate ions, or carbamate ions, an aluminosilicate, an anionic surfactant, a chelating agent, a thickener, a filler, an amino acid, a hydrolyzed protein, a C3-C20 monocarboxylic acid, and a C3-C10 di- or tricarboxylic acid.

[0094] Embodiment 15. A bleaching powder according to embodiment 14, wherein the at least one additive (D) is present in an amount ranging from ≧5.0 wt.% to ≦30 wt.%, preferably from ≧7.0 wt.% to ≦25 wt.%, more preferably from ≧10.0 wt.% to ≦22 wt.%, even more preferably from ≧11 wt.% to ≦21 wt.%, most preferably from ≧12 wt.% to ≦20 wt.%, in particular from ≧13 wt.% to ≦20 wt.%, based on the total weight of the bleaching powder.

[0095] Embodiment 16. The bleaching powder of embodiment 14, wherein the source of carbonate or bicarbonate or carbamate ions is selected from the group consisting of sodium, potassium, guanidine, arginine, lithium, calcium, magnesium, barium, and ammonium salts of carbonate, carbamate, and bicarbonate ions.

[0096] Embodiment 17. A bleaching powder as described in embodiment 14, wherein the at least one source of carbonate ions or bicarbonate ions or carbamate ions is present in an amount within the range of ≧5.0 wt.% to ≦20 wt.%, preferably within the range of ≧7.0 wt.% to ≦15 wt.%, more preferably within the range of ≧8.0 wt.% to ≦12 wt.%, based on the total weight of the bleaching powder.

[0097] Embodiment 18. The bleaching powder of embodiment 14, wherein the aluminosilicate is sodium aluminosilicate.

[0098] Embodiment 19. A bleaching powder according to any one of embodiments 14 to 18, wherein the aluminosilicate is present in an amount in the range of ≧10.0 wt.% to ≦35 wt.%, preferably ≧12 wt.% to ≦30 wt.%, more preferably ≧15 wt.% to ≦25 wt.%, based on the total weight of the bleaching powder.

[0099] Embodiment 20. A bleaching powder according to any one of embodiments 14 to 19, wherein the anionic surfactant is selected from the group consisting of alkali metal and alkaline earth metal salts of laurate, myristate, palmitate, stearate, or behenate.

[0100] Embodiment 21. A bleaching powder according to any one of embodiments 14 to 19, wherein the anionic surfactant is selected from the group consisting of sodium and potassium salts of laurate, palmitate, or stearate.

[0101] Embodiment 22. A bleaching powder according to any one of embodiments 14 to 20, wherein the anionic surfactant is present in an amount within the range of ≧2.0 wt.% to ≦9.0 wt.%, preferably within the range of ≧3.0 wt.% to ≦8.0 wt.%, and more preferably within the range of ≧4.0 wt.% to ≦7.0 wt.%, based on the total weight of the bleaching powder.

[0102] Embodiment 22. The chelating agent is ethylenediaminetetraacetic acid (EDTA), ethylenediamine-N,N'-disuccinic acid (EDDS), ethylenediamine-N,N'-diglutaric acid (EDDG), 2-hydroxypropylenediamine-N,N'-disuccinic acid (HPDDS), N,N-dicarboxymethylglutamic acid (GLDA), glycinamide-N,N'-disuccinic acid (GADS), ethylenediamine-N,N'-bis(ortho-hydroxyphenylacetic acid) (EDDHA), dimethylglucamine (DMG), N-(1-carboxyethyl)iminodiacetic acid, methylglycine N,N-diacetic acid, diethylenetriaminepentaacetic acid (DTPA), ethylenedicystic acid (EDC), N,N'-bis(2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid (HBED), ethylenediamine-N ... 22. The bleaching powder of any one of embodiments 14 to 21, wherein the bleaching powder is selected from the group consisting of diamine tri(methylene phosphonate), tetramethylethylenediamine (TMEDA), N,N,N',N'-tetraethylethylenediamine (TEEDA), and salts thereof.

[0103] Embodiment 24. The bleaching powder of embodiment 23, wherein the chelating agent is selected from the group consisting of ethylenediaminetetraacetic acid (EDTA), ethylenediamine-N,N'-disuccinic acid (EDDS), and salts thereof.

[0104] Embodiment 25. A bleaching powder according to any one of embodiments 14 to 24, wherein the chelating agent is present in an amount within the range of ≧0.4 wt.% to ≦3.0 wt.%, preferably within the range of ≧0.5 wt.% to ≦2.0 wt.%, and more preferably within the range of ≧0.7 wt.% to ≦1.5 wt.%, based on the total weight of the bleaching powder.

[0105] Embodiment 26. A bleaching powder according to any one of embodiments 14 to 25, wherein the thickening agent is selected from the group consisting of cellulose derivatives, polyacrylic acid, acrylate copolymers, polysaccharide gums, xanthan gum, starch, guar, starch derivatives, alginic acid, and acrylate-diallyldimethylammonium polymers.

[0106] Embodiment 27. The bleaching powder of embodiment 26, wherein the thickening agent is selected from the group consisting of xanthan gum, starch, and alginic acid.

[0107] Embodiment 28. A bleaching powder described in any one of embodiments 14 to 27, wherein the thickener is present in an amount within the range of ≧2.0 wt.% to ≦10.0 wt.%, preferably within the range of ≧3.5 wt.% to ≦8.0 wt.%, and more preferably within the range of ≧4.0 wt.% to ≦6.0 wt.%, based on the total weight of the bleaching powder.

[0108] Embodiment 29. The bleaching powder of embodiment 14, wherein the filler is selected from the group consisting of kaolin clay, smectite clay, and sepiolite clay.

[0109] Embodiment 30. A bleaching powder according to any one of embodiments 14 to 29, wherein the filler is present in an amount within the range of ≧2.0 wt.% to ≦10.0 wt.%, preferably within the range of ≧3.5 wt.% to ≦8.0 wt.%, and more preferably within the range of ≧4.0 wt.% to ≦6.0 wt.%, based on the total weight of the bleaching powder.

[0110] Embodiment 31. A bleach powder described in any one of embodiments 14 to 30, wherein the amino acid is selected from the group consisting of alanine, glycine, phenylalanine, leucine, valine, isoleucine, glutamic acid, aspartic acid, citrulline, histidine, arginine, lysine, and tyrosine.

[0111] Embodiment 32. A bleach powder described in any one of embodiments 14 to 31, wherein the amino acid is present in an amount within the range of ≧0.05 wt.% to ≦2.0 wt.%, preferably within the range of ≧0.1 wt.% to ≦1.5 wt.%, more preferably within the range of ≧0.1 wt.% to ≦1.3 wt.%, and even more preferably within the range of ≧0.1 wt.% to ≦1.0 wt.%, based on the total weight of the bleach powder.

[0112] Embodiment 33. The bleaching powder of any one of embodiments 14 to 32, wherein the hydrolyzed protein is selected from the group consisting of hydrolyzed keratin and hydrolyzed vegetable protein.

[0113] Embodiment 34. The bleaching powder of any one of embodiments 14 to 33, wherein the C3-C10 dicarboxylic or tricarboxylic acid is selected from the group consisting of tartronic acid, succinic acid, malic acid, maleic acid, citric acid, tartaric acid, adipic acid, glutaric acid, oxalic acid, sebacic acid, glyoxylic acid, malonic acid, and hydroxyglutaric acid.

[0114] Embodiment 35. A bleaching powder according to any one of embodiments 14 to 34, wherein the C3-C20 monocarboxylic acid or C3-C10 dicarboxylic or tricarboxylic acid is present in an amount within the range of ≧0.05 wt.% to ≦2.0 wt.%, preferably within the range of ≧0.1 wt.% to ≦1.5 wt.%, more preferably within the range of ≧0.1 wt.% to ≦1.3 wt.%, and even more preferably within the range of ≧0.1 wt.% to ≦1.0 wt.%, based on the total weight of the bleaching powder.

[0115] Embodiment 36. (A) ≥ 2.0 wt.% to ≤ 5.0 wt.% squalane; (B) ≥ 40 wt.% to ≤ 60 wt.% of at least one persulfate; (C) ≥ 20 wt.% to ≤ 32 wt.% sodium silicate, and (D) ≧12 wt.% to ≦25 wt.% of at least one additive selected from the group consisting of a source of carbonate ions or bicarbonate ions or carbamate ions, aluminosilicates, anionic surfactants, chelating agents, thickeners, fillers, amino acids, hydrolyzed proteins, C3-C20 monocarboxylic acids, and C3-C10 di- or tricarboxylic acids. 36. The bleaching powder of any one of embodiments 1 to 35, comprising:

[0116] Embodiment 37. At least the following: a) combining the bleaching powder of any one of embodiments 1 to 36 with an aqueous medium to form a bleaching medium; b) applying a bleaching medium to the hair; c) allowing the bleaching medium to remain on the hair for at least 2 to 50 minutes; d) rinsing the bleaching medium from the hair; and e) optionally drying the bleached hair 1. A method for bleaching hair, comprising:

[0117] Embodiment 38. Use of at least one saturated acyclic terpane having 10 to 40 carbon atoms to reduce dusting of a bleach powder comprising at least one persulfate and at least one silicate selected from the group consisting of alkali metal silicates, alkali metal metasilicates, and ammonium silicate.

[0118] Embodiment 39. The use of embodiment 38, wherein the saturated acyclic terpane having 10 to 40 carbon atoms is squalane.

[0119] While the presently claimed invention has been described in terms of specific embodiments thereof, certain modifications and equivalents will be apparent to those skilled in the art and are intended to be included within the scope of the presently claimed invention. [Example]

[0120] The presently claimed invention is further described in the following non-limiting examples. More particularly, the test methods specified below are part of the general disclosure of this application and are not limited to the specific examples.

[0121] material Potassium persulfate, commercially available from United Initiators (Pulla, Germany) Alkaline sodium silicate commercially available from BASF (Ludwigshafen / Rhine, Germany) Ammonium persulfate, commercially available from United Initiators (Pulach, Germany) Magnesium carbonate hydroxide, commercially available from Dr. Paul Lohmann (Emmerthal, Germany) Sodium stearate commercially available from Matrix Chemie Squalane commercially available from Aprinnova Xanthan gum commercially available from KP Kelco (Grossenbrode, Germany) Algin commercially available from BASF (Ludwigshafen / Rhine, Germany) Disodium EDTA commercially available from BASF (Ludwigshafen / Rhine, Germany) D,L-Malic acid, commercially available from Merck Chemicals GmbH (Darmstadt, Germany) Mineral oil commercially available from Panama PetroChem Ltd. (India)

[0122] Test Method Combing force measurement Various external influences, such as certain cosmetic treatments (bleaching, coloring, permanent waving), exposure to weather, and frequent combing and brushing, can deteriorate the hair cuticle, leading to poor combability. Therefore, hair combability is a key parameter for describing the quality / damage of hair on the one hand, and the effectiveness of the respective conditioning treatment on the other. The principle of most methods for measuring combability is to measure the force required to pass a comb through a hair tress under defined conditions (see CR Robbins, Chemical and Physical Behavior of Human Hair, 5th Edition, p. 646 ff., Springer-Verlag, Berlin Heidelberg 2012. ISBN 978-3-642-25610-3). For this test, an automated device was used, in which the test tress was removed from a storage chamber and fixed to a force meter. The tress was automatically combed at a constant speed. For each combing stroke, the combing force was recorded as a function of the combing distance (length of the hair tress). For comparison, 20 combing strokes per tress were averaged for at least three tresses per product sample. The wet combing force is the average force along the hair tress. The lower the combing force, the easier the hair is to comb.

[0123] combination Samples were prepared by mixing all dry ingredients in a mixer with a mixing blade rotation speed of 3.5 rpm for 5 minutes, setting the rotation speed at 3 rpm to remove the dusting ingredients drop by drop, and finally increasing the speed to 3.5 rpm for 6 minutes to ensure a homogeneous mixture. TIFF2025539601000003.tif70170

[0124] Examples 1 and 2: Combing test In the examples of the presently claimed invention, either Welloxon® Perfect 6% or 9% oxidizing formulations (developer: Wella Germany GmbH, Darmstadt, Germany) containing 6 wt.% or 9 wt.% hydrogen peroxide in an aqueous medium, based on the total weight of the product, were used.

[0125] Bleaching compositions prepared by mixing the bleaching powders described in Table 1 (Samples 1 and 2) with a commercial developer as described above were tested for their effect on hair combability and smoothness.

[0126] The following protocol was used to evaluate the performance of each oxidative hair treatment composition. 1. Three natural Caucasian hair tresses (Kerling) were used. 2. A bleaching composition prepared using Welloxon® Perfect 9% and Blonder® was applied. 3. 1 part of each bleach powder was mixed with 1.5 parts of an oxidizing composition (Welloxon® Perfect 9%) and applied to the entire hair tress with a brush. 4 g of product was applied to 1 g of hair tress. 3. The hair bundle was placed in an oven at 30°C for 30 minutes to bleach it. 4. After that, remove the hair bundle from the oven and soak it for 4 L at 37±2℃. -1 Rinse with water for 2 minutes. 5. Comb the hair strand twice (with the coarse and fine sides of the comb) and place it between pre-wetted hair. 6. Combing force measurements were performed three times on each tress.

[0127] The measurement results are shown in Table 2. TIFF2025539601000004.tif25170

[0128] The results showed that hair tresses treated with a bleaching powder based on Sample 1 containing squalane mixed with Welloxon® Perfect 9% required statistically significantly less force to comb than hair tresses treated with a bleaching powder containing mineral oil, demonstrating that the addition of squalane reduces mechanical damage to hair when combing.

[0129] Examples 3 and 4: Dusting Prevention Bleach powder samples 1 and 2 were mixed with Welloxon® developer. The powder products were poured from the container and prior to mixing, and the prototypes were evaluated 10 times by three stylists, who rated them as exhibiting less or similar dusting compared to the mineral oil-reduced dusting control.

Claims

1. (A) at least one saturated acyclic terpane selected from the group consisting of squalane, isosqualane, and neosqualane, which is a saturated acyclic terpane having 10 to 40 carbon atoms; (B) at least one persulfate; (C) at least one silicate selected from the group consisting of alkali metal silicates, alkali metal metasilicates, and ammonium silicate; Contains bleach powder.

2. 2. The bleaching powder of claim 1, wherein the at least one component (A) is present in an amount in the range of 0.5 wt. % to ≦15.0 wt. %, preferably in the range of ≧1.0 wt. % to ≦14.0 wt. %, more preferably in the range of ≧2.0 wt. % to ≦13.0 wt. %, even more preferably in the range of ≧2.0 wt. % to ≦10.0 wt. %, most preferably in the range of ≧2.0 wt. % to ≦8.0 wt. %, and especially in the range of ≧2.0 wt. % to ≦5.0 wt. %, based on the total weight of the bleaching powder.

3. 3. The bleaching powder of claim 1, wherein the at least one persulfate (B) is selected from the group consisting of ammonium persulfate, sodium persulfate, and potassium persulfate.

4. 4. The bleaching powder according to any one of claims 1 to 3, wherein the at least one component (B) is present in an amount in the range of ≥ 20 wt. % to ≤ 70 wt. %, preferably in the range of ≥ 25 wt. % to ≤ 65 wt. %, more preferably in the range of ≥ 40 wt. % to ≤ 65 wt. %, based on the total weight of the bleaching powder.

5. 5. Bleaching powder according to any one of claims 1 to 4, wherein the at least one silicate (C) is sodium silicate.

6. 6. The bleaching powder according to any one of claims 1 to 5, wherein the at least one component (C) is present in an amount in the range of ≥ 10 wt. % to ≤ 40 wt. %, preferably in the range of ≥ 15 wt. % to ≤ 35 wt. %, more preferably in the range of ≥ 20 wt. % to ≤ 32 wt. %, based on the total weight of the bleaching powder.

7. 7. The bleaching powder of claim 1, further comprising at least one additive (D) selected from the group consisting of a source of carbonate ions, bicarbonate ions, or carbamate ions, an aluminosilicate, an anionic surfactant, a chelating agent, a thickener, a filler, an amino acid, a hydrolyzed protein, a C3-C20 monocarboxylic acid, and a C3-C10 di- or tricarboxylic acid.

8. 8. Bleaching powder according to claim 7, wherein the at least one additive (D) is present in an amount in the range of ≥ 5.0 wt. % to ≤ 30 wt. %, preferably in the range of ≥ 7.0 wt. % to ≤ 25 wt. %, more preferably in the range of ≥ 10.0 wt. % to ≤ 22 wt. %, even more preferably in the range of ≥ 11 wt. % to ≤ 21 wt. %, most preferably in the range of ≥ 12 wt. % to ≤ 20 wt. %, especially in the range of ≥ 13 wt. % to ≤ 20 wt. %, based on the total weight of the bleaching powder.

9. (A) ≧2.0 wt. % to ≦5.0 wt. % squalane; (B) ≥ 40 wt. % to ≤ 60 wt. % of at least one persulfate; (C) ≥ 20 wt. % to ≤ 32 wt. % sodium silicate, and (D) ≧12 wt. % to ≦25 wt. % of at least one additive selected from the group consisting of a source of carbonate ions, bicarbonate ions, or carbamate ions, aluminosilicates, anionic surfactants, chelating agents, thickeners, fillers, amino acids, hydrolyzed proteins, C3-C20 monocarboxylic acids, and C3-C10 di- or tricarboxylic acids.

9. The bleaching powder of claim 1, comprising:

10. At least the following steps: a) combining a bleaching powder according to any one of claims 1 to 9 with an aqueous medium to form a bleaching medium; b) applying a bleaching medium to the hair; c) allowing the bleaching medium to remain on the hair for at least 2 to 50 minutes; d) rinsing the bleaching medium from the hair; and e) optionally drying the bleached hair 1. A method for bleaching hair, comprising:

11. Use of at least one saturated acyclic terpane having 10 to 40 carbon atoms selected from the group consisting of squalane, isosqualane, and neosqualane to reduce dusting of a bleaching powder containing at least one persulfate and at least one silicate selected from the group consisting of alkali metal silicates, alkali metal metasilicates, and ammonium silicate.

12. 12. The use according to claim 11, wherein the saturated acyclic terpane having 10 to 40 carbon atoms is squalane.

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