Composition containing hydrolyzed protein

Abstract

The present invention provides a composition comprising a blend of a) a first component, which is a partially hydrolyzed protein obtained from a potato protein source, and b) a second component, which is a partially hydrolyzed protein obtained from a vegetable protein source other than potato, wherein the weight ratio of the first component to the second component in the blend is from 0.5:1 to 2:1. The present invention also provides a personal care formulation comprising such a composition and a personal care ingredient, wherein the personal care formulation is for topical application to skin or hair. The present invention further provides a method of treating hair using the composition, and the use of the composition for treating hair.

Description

Technical Field

[0001] Cross - Reference to Related Applications This application claims priority to U.S. Provisional Application No. 62 / 982,862, filed on February 28, 2020, entitled “COMPOSITIONS COMPRISING HYDROLYSED PROTEINS”, the content of which is incorporated herein by reference in its entirety for all purposes.

[0002] The present invention relates to compositions comprising hydrolyzed proteins derived from plant sources, and specifically to their use in personal care formulations, preferably hair care formulations, for application to human skin or hair. More specifically, the present invention relates to compositions comprising a first hydrolyzed protein component obtained from a potato source and a second hydrolyzed protein component obtained from a plant source other than potato.

Background Art

[0003] The need for hair care products is well known. Such products can be used to clean or style human hair or to address various problems that human hair faces, such as those due to treatments like bleaching or coloring, or environmental factors like sunlight, heat, and pollution. Some hair care formulations also aim to improve the quality of hair, such as strength, shine, or ease of brushing / combing.

[0004] Hydrolyzed keratin protein is known as an ingredient used in hair care formulations to strengthen hair and / or reduce breakage. It is generally accepted that the cystine / cysteine ​​amino acid portion of keratin protein significantly contributes to its strengthening properties. A distinctive feature of keratin protein is the presence of a large amount of the sulfur-containing amino acid cysteine. This is necessary for disulfide crosslinking, which imparts additional strength and stiffness to the protein through crosslinking. Human hair contains approximately 14% by weight of cysteine. However, hydrolyzed keratin protein is derived from animal sources, which can be undesirable for consumers.

[0005] There is a continued need to develop improved personal care products and formulations, specifically hair care formulations and ingredients. [Overview of the Initiative]

[0006] The object of the present invention is to address the above and other drawbacks related to the prior art.

[0007] According to the first aspect, the present invention is a) Component 1 is a partially hydrolyzed protein obtained from a potato protein source, b) The second component is a partially hydrolyzed protein obtained from a plant protein source other than potatoes. A composition comprising a blend of, The weight ratio of the first component to the second component in the aforementioned blend is 0.5:1 to 2:1. A composition is provided.

[0008] According to a second aspect, the present invention relates to a method for treating hair, i) A step of applying a composition to the hair, comprising a first partially hydrolyzed protein component obtained from a potato protein source and a second partially hydrolyzed protein component obtained from a plant protein source other than potatoes, ii) Optionally, the step of rinsing the composition off the hair. The present invention provides a method for treating hair, including [specific details omitted].

[0009] The composition of the second embodiment may contain any of the features of the first embodiment of the present invention.

[0010] According to a third aspect, the present invention provides for the use of a composition comprising a first hydrolyzed protein component obtained from a potato protein source and a second hydrolyzed protein component obtained from a plant protein source other than potatoes, for the treatment of hair.

[0011] A composition of the third embodiment may contain any of the features of the first embodiment of the present invention.

[0012] All features described herein can be combined with any of the embodiments described above in any combination.

[0013] This invention is partly based on the inventors' recognition that the composition of the present invention has advantageous properties based on a specific combination of a potato-derived protein component and a plant (non-potato)-derived protein component. One advantageous property of this combination is a strengthening effect on human hair, for example, an increase in the total work required to break the hair. Independently speaking, it is proposed that a specific combination and / or ratio of the first and second protein components provides an amino acid profile that contributes to a strengthening effect on human hair. Surprisingly, this strengthening effect is achieved despite the combination of hydrolyzed potato protein and non-potato hydrolyzed plant protein having lower amounts of cystine / cysteine ​​amino acids than are normally present in hydrolyzed keratin protein. [Modes for carrying out the invention]

[0014] Needless to say, any upper or lower limits, or range limits, used herein can be combined independently.

[0015] Needless to say, when describing the number of carbon atoms in a substituent (e.g., C1-C6), this number refers to the total number of carbon atoms in the substituent, including any carbon atoms present in any branched group. In addition, when describing the number of carbon atoms in a fatty acid, for example, this refers to the total number of carbon atoms, including those in a carboxylic acid and any carbon atoms present in any branched group.

[0016] The term "personal care" refers to personal care for humans. The term "hair care" refers to hair care for humans.

[0017] The term “partially hydrolyzed protein” is used herein to mean a protein that has undergone partial hydrolysis. Partially hydrolyzed proteins may comprise protein fragments, polypeptides, peptides, amino acids, and / or peptones. Needless to say, partial hydrolysis excludes the complete hydrolysis of a protein to consist solely of individual amino acids. Partially hydrolyzed proteins may be produced by acid, alkali, and / or enzymatic hydrolysis of native proteins. Enzymatic hydrolysis is preferred. To put it simply, without being bound by theory, the advantage of enzymatic hydrolysis over acid or alkali hydrolysis is that enzymatic hydrolysis is more selective at the site on the hydrolyzed protein and, consequently, produces a different aggregate of protein fragments, polypeptides, peptides, amino acids, and / or peptones than acid or alkali hydrolysis. Roughly speaking, acid hydrolysis can produce the smallest fragments and alkali hydrolysis can produce the largest fragments, while enzymatic hydrolysis can produce fragments of intermediate size between acid and alkali hydrolysis.

[0018] For example, if a protein is covalently reacted with a functional group, such as a silane, a quaternary ammonium compound, and / or an acid chloride, this or each of these hydrolyzed proteins can be independently further chemically modified.

[0019] One or more of the hydrolyzed proteins may be chemically unmodified hydrolyzed proteins. "Chemically unmodified hydrolyzed protein" means a protein that has not been further chemically modified (or reacted) other than by hydrolysis. The first component may be a chemically unmodified hydrolyzed protein. The second component may be a chemically unmodified hydrolyzed protein. Preferably, the first component and / or the second component is a chemically unmodified hydrolyzed protein.

[0020] Needless to say, the amino acid profile of the blend of the present invention can be easily determined by completely hydrolyzing the blend into individual amino acids and then quantifying the amount of each amino acid present. It is understood that the amino acid profile of the protein remains the same or substantially the same from the protein starting material to the hydrolyzed protein.

[0021] Many of the chemical substances that can be used to produce the compositions of the present invention are obtained from natural sources. Such chemical substances typically contain mixtures of chemical species resulting from these natural origins. Based on the presence of such mixtures, it is possible for the various parameters defined herein to be average values and may be non-integer.

[0022] Preferably, the composition of the present invention is substantially free of quaternary ammonium compounds. The use of the term "substantially free of" means that the composition preferably contains preferably less than 10% by weight, more preferably less than 5% by weight, even more preferably less than 2% by weight, and most preferably less than 1% by weight, based on the total weight of the composition. Preferably, the composition contains a quaternary ammonium compound.

[0023] Preferably, the composition of the present invention substantially does not contain a silicone compound. The use of the term "substantially does not contain" means that the composition preferably contains less than 10% by weight, more preferably less than 5% by weight, even more preferably less than 2% by weight, and most preferably less than 1% by weight, based on the total weight of the composition. Preferably, the composition does not contain a silicone compound.

[0024] The composition of the present invention may be a topical composition, preferably a topical composition for application to the skin or hair (i.e., human skin or hair), more preferably a topical composition for application to the hair. The hair may be natural or may have been subjected to bleaching, hair straightening, or other chemical treatments. The hair may be African, Asian, European, Caucasian, Hispanic, or other hair types. The hair may be straight, wavy, curly, or coiled in its natural state. The composition of the present invention may be a cosmetic composition. The composition must not be a food composition. The composition must not be (human) food.

[0025] The composition of the present invention a) a first component that is a partially hydrolyzed protein obtained from a potato source, and b) a second component that is a partially hydrolyzed protein obtained from a plant source other than potato and contains a blend of The weight ratio of the first component: second component in the blend is 0.5:1 to 2:1.

[0026] Preferably, the composition does not contain a protein component obtained from an animal protein source. This is advantageous because the animal source may not be desirable to consumers. Preferably, the composition does not contain components derived from animals. Preferably, the composition is suitable for vegan consumers.

[0027] The first component is a partially hydrolyzed protein obtained from a potato source. The potato protein source may be a potato protein concentrate and / or isolate. As a first step, an aqueous dispersion of the potato protein concentrate and / or isolate can be formed, and as a second step, the protein can be hydrolyzed. The difference between the potato protein source and the partially hydrolyzed protein may be that the partially hydrolyzed protein has higher water solubility than the potato protein source at a reference temperature (e.g., room temperature).

[0028] The first component can be produced by acid, alkali, or enzymatic hydrolysis. Enzymatic hydrolysis is preferred. One or more enzymes may be used. The enzymes are preferably not of animal origin. Preferably, the enzymes are derived from a microbial source. The enzymes may include carbohydrase and / or protease. Hydrolysis may be carried out to the extent necessary to achieve the desired weight-average molecular weight of the hydrolyzed protein. The degree of hydrolysis can be varied by changing the temperature, the acid / alkali / enzyme used, and the time spent. Unwanted materials may be removed by filtering and / or treating the resulting hydrolyzed protein. For example, any chloride ions present when acid hydrolysis is used can be removed by treating the hydrolyzed protein.

[0029] The weight-average molecular weight (Mw) of the first component hydrolyzed protein may be at least 200 daltons (Da), preferably at least 300 Da, more preferably at least 400 Da, and specifically at least 500 Da. The weight-average molecular weight may be up to 100,000 Da, preferably up to 50,000 Da, more preferably up to 10,000 Da, specifically up to 5,000 Da, and particularly up to 2,500 Da. The molecular weight can be measured by size exclusion chromatography, for example, by size exclusion HPLC (SE-HPLC) as described in the test method below.

[0030] The second component is a partially hydrolyzed protein obtained from a plant source other than potatoes. The plant source other than potatoes is selected from wheat, cottonseed, peas, and soybeans, preferably selected from wheat, cottonseed, and peas, more preferably selected from cottonseed and peas, and specifically may be selected from peas. Preferably, the second component is obtained from a pea or cottonseed protein source. Preferably, the composition does not contain protein components obtained from a wheat protein source. This may be advantageous because wheat protein may be undesirable for certain consumers.

[0031] The second component can be obtained from a protein concentrate and / or isolate. The first step may be to form an aqueous dispersion of the protein concentrate and / or isolate, and the second step may be to hydrolyze the protein. The difference between the second protein source and the partially hydrolyzed protein may be that the partially hydrolyzed protein has higher water solubility than the second protein source at a reference temperature (e.g., room temperature).

[0032] The second component can be produced by acid, alkali, or enzymatic hydrolysis. Enzymatic hydrolysis is preferred. One or more enzymes may be used. The enzymes are preferably not of animal origin. Preferably, the enzymes are derived from a microbial source. The enzymes may include carbohydrase and / or protease, and preferably the enzymes are proteases. Hydrolysis may be carried out to the extent necessary to achieve the desired weight-average molecular weight of the hydrolyzed protein. The degree of hydrolysis can be varied by changing the temperature, the acid / alkali / enzyme used, and the time spent. Unwanted materials may be removed by filtering and / or treating the resulting hydrolyzed protein. For example, any chloride ions present when acid hydrolysis is used can be removed by treating the hydrolyzed protein.

[0033] The weight-average molecular weight (Mw) of the second component hydrolyzed protein may be at least 400 daltons (Da), preferably at least 500 Da, more preferably at least 600 Da, and specifically at least 700 Da. The weight-average molecular weight may be up to 100,000 Da, preferably up to 50,000 Da, more preferably up to 10,000 Da, specifically up to 5,000 Da, and particularly up to 2,500 Da. The molecular weight can be measured by size exclusion chromatography, for example, by size exclusion HPLC (SE-HPLC) as described in the test method below.

[0034] The weight ratio of the first component to the second component in the blend (or composition) is at least 0.5:1, preferably at least 0.6:1, more preferably at least 0.7:1, specifically at least 0.8:1. The weight ratio of the first component to the second component in the blend is up to 2:1, preferably up to 1.8:1, more preferably up to 1.6:1, specifically up to 1.4:1, and preferably up to 1.2:1. Preferably, the weight ratio of the first component to the second component in the blend is 0.6:1 to 1.4:1.

[0035] The blend may have a component amino acid profile characterized by the amount of each individual amino acid present in the fully hydrolyzed sample of the blend. The amino acid profile can be determined by fully hydrolyzing the blend and quantifying the amount of each individual amino acid by high-performance liquid chromatography (HPLC). The blend may contain at least 5% by weight, preferably at least 6% by weight, more preferably at least 7% by weight and / or preferably up to 20% by weight, and more preferably up to 16% by weight of aspartic acid, based on the total weight of amino acids in the blend. The blend may contain at least 10% by weight, preferably at least 12% by weight, more preferably at least 14% by weight and / or preferably up to 28% by weight, and more preferably up to 26% by weight of glutamic acid, based on the total weight of amino acids in the blend. The blend may contain at least 5% by weight, preferably at least 6% by weight, more preferably at least 7% by weight and / or preferably up to 15% by weight, and more preferably up to 10% by weight of leucine, based on the total weight of amino acids in the blend. The blend may contain at least 3% by weight, preferably at least 4% by weight, more preferably at least 5% by weight and / or preferably up to 12% by weight, more preferably up to 10% by weight of arginine, based on the total weight of amino acids in the blend.

[0036] A remarkable feature of the present invention is the advantages provided by the hydrolyzed protein blend despite the low levels of cystine / cysteine ​​in the blend. The blend may contain up to 10% by weight, preferably up to 8% by weight, more preferably up to 6% by weight, specifically up to 4% by weight of cystine / cysteine, based on the total weight of amino acids in the blend.

[0037] The weight-average molecular weight (Mw) of the blend may be at least 400 Datons (Da), preferably at least 500 Da, more preferably at least 600 Da, and specifically at least 700 Da. The weight-average molecular weight of the blend may be up to 100,000 Da, preferably up to 50,000 Da, more preferably up to 10,000 Da, specifically up to 5,000 Da, particularly up to 2,500 Da, even more preferably up to 1,500 Da, and even more preferably up to 1,200 Da. The molecular weight can be measured by size exclusion chromatography, for example, by size exclusion HPLC (SE-HPLC) as described in the test method below.

[0038] The composition of the present invention may contain at least 2% by weight, preferably at least 4% by weight, more preferably at least 8% by weight, specifically at least 10% by weight of the first component, based on the total weight of the composition. The composition may contain up to 30 wt%, preferably up to 20 wt%, more preferably up to 18 wt%, of the first component, based on the total weight of the composition.

[0039] The composition may contain at least 1% by weight, preferably at least 2% by weight, more preferably at least 4% by weight, specifically at least 5% by weight, and preferably at least 8% by weight, based on the total weight of the composition. The composition may contain up to 30% by weight, preferably up to 20% by weight, more preferably up to 18% by weight, specifically up to 15% by weight, based on the total weight of the composition, of the second component.

[0040] The combined (i.e., blended) first and second components may constitute at least 10% by weight, preferably at least 14% by weight, and more preferably at least 16% by weight, based on the total weight of the composition. The combined (i.e., blended) first and second components may constitute up to 40 wt%, preferably up to 30 wt%, and more preferably up to 25 wt%, based on the total weight of the composition.

[0041] The composition may contain water. The composition may contain at least 10% by weight of water, preferably at least 20% by weight, more preferably at least 30% by weight, specifically at least 40% by weight, preferably at least 50% by weight, particularly at least 60% by weight, and even more preferably at least 70% by weight, based on the total weight of the composition. The composition may contain up to 90% by weight of water, preferably up to 80% by weight, based on the total weight of the composition.

[0042] The composition may further contain one or more preservatives. The composition may contain at least 0.1% by weight, preferably at least 0.2% by weight, more preferably at least 0.4% by weight, specifically at least 0.6% by weight, of the total weight of the composition, as a preservative. The composition may contain up to 10% by weight, preferably up to 5 wt%, more preferably up to 3 wt%, specifically up to 2% by weight, of the total weight of the composition, as a preservative. The preservative may include phenoxyethanol, sodium benzoate, or potassium sorbate, preferably sodium benzoate and / or potassium sorbate. Alternatively, the composition may not contain any preservatives.

[0043] The composition may be a liquid at room temperature (25°C). The composition may be a solution or dispersion of the blend in a solvent, preferably a solution, and preferably the solvent contains water.

[0044] Alternatively, the composition may be a solid at room temperature (25°C). The composition may be a powder, preferably a powder obtained by spray drying.

[0045] Personal care and / or hair care formulations The present invention can provide a personal care formulation comprising the composition of the present invention and a personal care component. Preferably, the personal care formulation is for topical application to the skin or hair.

[0046] Personal care ingredients include cleansers, hair conditioners, hair styling agents, anti-dandruff agents, hair growth stimulants, fragrances, sunscreens, sunblocks, pigments, moisturizers, film-forming agents, hair dyes, makeup agents, thickeners, emulsifiers, humectants, emollients, preservatives, deodorizing agents, dermatologically acceptable carriers, surfactants, abrasives, absorbents, fragrances, colorants, essential oils, astringents, acne inhibitors, anticoagulants, defoamers, antioxidants, binders, enzymes, enzyme inhibitors, enzyme activators, coenzymes, plant extracts, ceramides, buffers, bulking agents, chelating agents, cosmetic biocides, topical analgesics, and substanceivity increasing agents. Agent), opacifier, pH adjuster, reducing agent, metal ion chelating agent, skin bleaching and / or whitening agent, skin conditioning agent, skin analgesic and / or healing agent, skin treatment agent, A choice is made from either vitamins or preservatives.

[0047] Preferably, the personal care ingredients are selected from cleansing agents, hair conditioning agents, skin conditioning agents, hair styling agents, anti-dandruff agents, hair growth stimulants, fragrances, sunscreen compounds, pigments, moisturizers, film-forming agents, humectants, alpha-hydroxy acids, hair dyes, makeup agents, thickeners, preservatives, deodorants, and surfactants.

[0048] The personal care formulation may be a skin care and / or hair care formulation, preferably a hair care formulation.

[0049] The types of personal care formulations defined herein may take the form of emulsions (e.g., oil-in-water emulsions or water-in-oil emulsions), anhydrous formulations (e.g., hair oils, hair sprays / serums), detergent formulations, preferably water-in-oil emulsions and / or detergent formulations. Personal care emulsion formulations may preferably take the form of pastes, creams, liquids, and milks, and in the field of hair care formulations, they may aim to provide a pleasant aesthetic feel to the hair and improve manageability and appearance.

[0050] Personal care formulations can have various consistencys and / or viscosities depending on the intended end use of the formulation. Personal care formulations are preferably fluid at room temperature. Personal care formulations may also be powders or solid formulations at room temperature.

[0051] The end uses of such formulations in the field of personal care products include body butters, gel creams, highly fragranced products, perfume creams, hair conditioners, hair relaxers, hair shampoos, hair styling products, leave-on hair products, anhydrous products, antiperspirants and deodorants, cleansers, 2-in-1 foaming emulsions, emulsifier-free products, mild formulations, such as scrub formulations containing solid beads, silicone-in-water formulations, pigment-containing products, sprayable emulsions, such as hair detanglers, color cosmetics, shower products, makeup removers, eye makeup removers, and wipes. More preferably, the end uses of such formulations include hair conditioners, hair relaxers, hair shampoos, hair styling products, leave-in hair products, and sprayable emulsions, such as hair detanglers. Preferably, the personal care formulations are selected from shampoos, leave-in conditioners, rinse-off conditioners, and hair styling products.

[0052] Preferably, the composition of the present invention is the only active conditioning ingredient present in the personal care formulation. Preferably, the formulation does not contain additional conditioning ingredients, such as ammonium quaternized compounds or silicones.

[0053] Preferably, the composition of the present invention is present in the personal care (or hair care) formulation at a low concentration. Preferably, the composition of the present invention is present in the formulation at a concentration of at least 0.01% w / w, preferably at least 0.1% w / w, more preferably at least 0.5% w / w, and most preferably at least 0.8% w / w, based on the total weight of the formulation. Preferably, the composition of the present invention is present in the formulation at a concentration of up to 40% w / w, up to 30% w / w, up to 20% w / w, preferably up to 15% w / w, more preferably up to 10% w / w, and most preferably up to 8% w / w, based on the total weight of the formulation.

[0054] Preferably, the personal care (or hair care) formulation includes a base vehicle for supporting the composition of the present invention. Preferably, the base vehicle contains a relatively high concentration of water. Preferably, water is present in the personal care formulation at a concentration of at least 20% w / w, preferably at least 25% w / w, more preferably at least 28% w / w, and most preferably at least 30% w / w of the total formulation. Preferably, water is present in the personal care formulation at a concentration of up to 99% w / w, preferably up to 96% w / w, preferably up to 94% w / w, and most preferably up to 90% w / w of the total formulation. Alternatively, the formulation may be substantially anhydrous. The formulation may not contain water.

[0055] Preferably, the personal care (or hair care) formulation is acidic. Preferably, the pH of the formulation is 1 to 6, more preferably 2 to 5.5, more preferably 3 to 5, and most preferably 4 to 4.8.

[0056] Personal care (or hair care) formulations may contain additional ingredients, such as one or more emulsifiers, emollients, carriers, surfactants, and similar substances.

[0057] Preferably, personal care (or hair care) formulations further include an emulsifier. Preferably, the emulsifier is a nonionic, high-HLB (hydrophilic / lipophilic balance) surfactant capable of forming an oil-in-water emulsion. The emulsifier may be of a naturally derived type. Examples of suitable emulsifiers include ethoxylated sorbitan esters, ethoxylated glyceryl esters, ethoxylated fatty alcohols (including lanolin alcohol), ethoxylated fatty acids (including lanolin fatty acid), glyceryl fatty acid monoesters, glyceryl fatty acid mono and diesters, sugar esters (sucrose fatty acid mono and diesters), fatty acid polyol (polyethylene glycol) esters, fatty alcohols (which may also act as co-emulsifiers), fatty acids and their phosphate esters, cationic surfactants, or monoalkyl tertiary amines, such as stearamidopropyl dimethylamine or behenamidopropyl dimethylamine.

[0058] When present in the formulation, the emulsifier is preferably present at a concentration of at least 0.2% w / w, preferably at least 0.5% w / w, more preferably at least 0.9% w / w, and most preferably at least 1.1% w / w, based on the total weight of the formulation. Preferably, the emulsifier is present in the formulation at a concentration of up to 20% w / w, preferably up to 12% w / w, more preferably up to 7% w / w, and most preferably up to 5% w / w, based on the total weight of the formulation. The concentration of the emulsifier present in the formulation is preferably higher than that present in this type of formulation containing quaternary materials. This compensates for the absence of quaternary materials in the formulation that would normally have an emulsifying effect on the formulation.

[0059] Personal care (or hair care) formulations may further contain at least one co-emulsifier. Preferably, this or each of these co-emulsifiers is a viscosity modifier that can adjust the viscosity of the formulation, more preferably a viscosity enhancer that can increase the viscosity of the formulation. Preferably, this or each of these co-emulsifiers is a fatty alcohol, preferably C 12 ~C 20 Alcohol, more preferably C 16 ~C18 Alcohols, or mixtures thereof. Alcohols suitable for use as coemulsifiers in personal care formulations include cetyl alcohol, stearyl alcohol, and cetearyl alcohol.

[0060] The formulation according to the present invention may contain other additional emollient materials, preferably emollient oils. Preferably, the emollient oil is a non-polar oil. Examples of emollient oils suitable for use in this formulation include mineral or paraffin oils, esters of fatty acids and fatty alcohols, preferably C 10 ~C 20 Acids or alcohols (although isopropyl esters may be used), fatty acid glycol esters, fatty acid triglycerides, esters and diesters of alkoxylated fatty acids, plant extracts, and hydrocarbons, preferably C 12 ~C 16 It includes. Preferably the emollient is a mineral oil. If present in the formulation, this or each additional emollient is preferably present in a concentration of at least 1% by weight and a maximum of 30% by weight based on the total weight of the formulation.

[0061] The personal care (or hair care) formulation according to the present invention may contain one or more surfactants, such as sodium lauryl ether (or laureth) sulfate and / or cocamidopropyl betaine. When present in the formulation, these or each surfactant is preferably present at a concentration of 1% to 20% by weight, preferably 2% to 15% by weight, and more preferably 4% to 10% by weight, based on the total weight of the formulation.

[0062] The personal care (or hair care) formulation according to the present invention may contain one or more cationic components. When present in the formulation, these or each surfactant is preferably present at a concentration of 0.01% to 10% by weight, preferably 0.05% to 8% by weight, and more preferably 0.1% to 5% by weight, based on the total weight of the formulation.

[0063] The personal care (or hair care) formulation according to the present invention may contain one or more types of silicones. If present in the formulation, these or each of these silicones are preferably present at a concentration of 0.05% to 10% by weight, preferably 0.1% to 8% by weight, and more preferably 0.5% to 5% by weight, based on the total weight of the formulation.

[0064] The personal care (or hair care) formulation according to the present invention may contain one or more film-forming components. When present in the formulation, these or each of these film-forming components are preferably present at a concentration of 0.01% to 5% by weight, preferably 0.05% to 3% by weight, and more preferably 0.1% to 2% by weight, based on the total weight of the formulation.

[0065] Numerous other components can be used in the formulation according to the present invention. These components may be oil-soluble, water-soluble, or insoluble. Examples of such materials are: (i) Preservatives, preferably those approved for cosmetic use, such as those listed in Annex 5 of the European Union Cosmetic Regulations. Preservatives preferably include sodium benzoate, potassium sorbate, or phenoxyethanol. Preservatives may also include parabens (alkyl esters of 4-hydroxybenzoic acid), substituted ureas, or hydantoin derivatives, such as those marketed under trade names Germaben II, Nipaguard BPX, and Nipaguard DMDMH. Preservatives may be used at a concentration of 0.5% to 2% by weight based on the total weight of the composition. (ii) Fragrances that are typically used at concentrations of 0.1% to 10% by weight, more typically up to about 5% by weight, and specifically up to about 2% by weight, based on the total weight of the composition. (iii) Humectants or solvents, such as alcohols, polyols, such as glycerol and polyethylene glycol, which are typically used in concentrations of 1% to 10% by weight based on the total weight of the composition. (iv) Alpha hydroxy acids, such as glycolic acid, citric acid, lactic acid, malic acid, tartaric acid, and their esters, self-tanning agents, such as dihydroxyacetone, (v) Vitamins and their precursors, including (a) vitamin A as, for example, retinyl palmitate and other tretinoin precursor molecules, (b) vitamin B as, for example, panthenol and its derivatives, (c) vitamin C as, for example, ascorbic acid and its derivatives, (d) vitamin E as, for example, tocopheryl acetate, and (e) vitamin F as a polyunsaturated fatty acid ester, for example, gamma-linolenic acid ester. (vi) Skin care products, for example, ceramide as a natural material, or ceramide as a functional mimetic of natural ceramide, (vii) Natural phospholipids, e.g., lecithin (viii) Vesicle-containing preparations (ix) Plant extracts with beneficial skincare properties (x) Skin whitening agents, such as kojic acid, arbutin, and similar materials, (xi) Skin repair compound active substances, e.g., allantoin and similar series (xii) Caffeine and similar compounds (xiii) Cooling additives, such as menthol or camphor, (xiv) Insect repellents, such as N,N-diethyl-3-methylbenzamide (DEET), and citrus oil or eucalyptus oil. (xv) Essential oils, and (xvi) Pigments comprising fine pigments, specifically oxides and silicates, such as iron oxide, specifically coated iron oxide, and / or titanium dioxide, and ceramic materials, such as boron nitride, or other solid components used in makeup and cosmetics to produce a suspense emulsion, typically used in amounts of 1% to 15% by weight, but usually at least 5% by weight, and specifically about 10% by weight, based on the total weight of the formulation. Includes.

[0066] The formulation may contain fragrance-imparting materials to provide a pleasant scent. In one embodiment, natural sources such as alfalfa, almond, amber, angelica root, anise, apple, apricot, banana, basil, bay laurel, benzoin, bergamot, bitter orange, black pepper, rosewood, cajeput, cardamom, carrot seed, cedarwood, cinnamon, citronella, citrus, clary sage, clove, cocoa, coconut, coffee, coriander, cranberry, cypress, elemi, eucalyptus globulus, eucalyptus, fennel, frankincense, galbanum, geranium, German chamomile, ginger, grapefruit, helichrysum, hyssop, and jasmine are used. Fragrances are provided from mint, juniper berry, lavender, lemon, lemongrass, lily, linden blossom, mango, marjoram, melissa, mint, myrrh, myrtle, neroli, niaouli, nutmeg, orange, oregano, palm, parsley, patchouli, peach, peppermint, petitgrain, pine, pineapple, raspberry, Roman chamomile, rose, rosemary, sandalwood, spruce, strawberry, tea, thyme, vanilla, vetiver, violet, yarrow, ylang-ylang, and similar. The fragrance is preferably selected from mint or vanilla.

[0067] The present invention can provide a hair care formulation comprising the composition of the present invention and a hair care ingredient. Preferably, the hair care formulation is for topical application to the hair.

[0068] Hair care ingredients may be selected from shine enhancers, moisturizers, herbal additives, hair strengtheners, vitamin additives, colorants, hair thickeners; setting and styling agents, UV absorbers, silicone oils, essential oils, and fragrances, thickeners or viscosity improvers, detergents, stabilizers, emollients, chelating agents, metal ion sequestering agents, preservatives, bactericides, antioxidants / radical scavengers, antistatic agents, conditioning agents, detangling ingredients, emulsifiers, or dispersants.

[0069] Preferably, the hair care formulation is a hair cleansing, conditioning, detangling, color protection, or styling formulation, particularly preferably a hair cleansing or conditioning formulation. Preferably, the hair care formulation is selected from shampoos, leave-in conditioners, rinse-off conditioners, and hair styling products.

[0070] Preferably, the composition of the present invention is present in the hair care formulation at a low concentration. Preferably, the composition of the present invention is present in the formulation at a concentration of at least 0.01% w / w, preferably at least 0.1% w / w, more preferably at least 0.5% w / w, and most preferably at least 0.8% w / w, based on the total weight of the formulation. Preferably, the composition of the present invention is present in the formulation at a concentration of up to 20% w / w, preferably up to 15% w / w, more preferably up to 10% w / w, and most preferably up to 8% w / w, based on the total weight of the formulation.

[0071] The hair care formulation may contain a silicone fluid or oil, such as dimethylpolysiloxane, dimethylsilicone, highly polymerized methylpolysiloxane, and methylpolysiloxane collectively known as dimethicone, cyclic oligomer alkylsiloxane, such as cyclic oligomethicone, or cyclic oligomers of dimethylsiloxane. The concentration of silicone oil in the formulation may be preferably 0.1% to 40% by weight, more preferably 0.3% to 20% by weight, specifically 0.5% to 5% by weight, and particularly 1% to 1.5% by weight, based on the total weight of the formulation. Alternatively, the hair care formulation may not contain a silicone compound.

[0072] The formulation is an aqueous leave-on or rinse-off end-use product. In the case of such formulations, a dilute solution can be used. Preferably, a buffer solution is used. The pH of this solution is adjusted to be slightly acidic, i.e., pH 4-6. For rinse-off formulations, the diluted formulation is instructed to be washed off after application. Depending on the required level of treatment, such instructions may require the product to remain on the hair for a certain period of time, for example, 1-30 minutes. For leave-on formulations, the rinsing step is omitted.

[0073] If the formulation is a hair shampoo or conditioner that functions to form a hair strengthening agent, the shampoo or conditioner may be in the form of a dispersion, emulsion, or solution. One preferred system is a system that forms a liquid crystal. The liquid crystal is preferably a lyotropic liquid crystal (i.e., dependent on both concentration and temperature), more preferably a lamellar phase liquid crystal, and more specifically an L-alpha phase (neat) liquid crystal.

[0074] The formulation contains numerous different types of functional ingredients, for example (i) Cationic hair conditioning agents, such as ethoxylated phosphate quaternary products (quats), marketed by Croda as, for example, Arlasilk®; fatty amidoamines, marketed by Croda as, for example, Incromine®; quaternary products, marketed by Croda as, for example, Incroquat®, Crodazosoft®, Rejuvasoft®, or VibraRiche®, typically used at a concentration of 1% to 5% by weight based on the total weight of the composition. These are typically combined with polymeric hair conditioning cationic materials, such as quaternized celluloses marketed by Croda as Crodacel® and MiruStyle®, and quaternized proteins marketed by Croda as, for example, Croquat®, Crolactin®, Crosilkquat®, Keramimic®, and Hydrotriticum®. (ii) Fatty alcohols, such as stearyl, cetearyl, cetyl, and oleyl alcohols, which are typically used at a concentration of 2% to 5% by weight based on the total weight of the composition. (iii) Humectants or solvents, such as alcohols and polyols, such as glycerol and polyethylene glycol, which are typically used in concentrations of 1% to 10% by weight based on the total weight of the composition. (iv) Reconstructors, such as hydrolyzed proteins, such as wheat proteins, which penetrate the hair and function to strengthen the hair structure via polymer crosslinking. (v) A glossing or detangling material that binds to the hair and reflects light, such as silicone, such as dimethicone, phenyl trimethicone, dimethiconol, and / or trimethylsilyl amodimethicone, which is usually used in a concentration of 0.2% to 10% by weight based on the total weight of the composition. (vi) Acidity adjusting agents, such as citric acid and lactic acid, which generally maintain the pH of the conditioner at approximately 4-6. (vii) Heat protectants that protect hair from excessive heat caused by blow-drying or using a hair iron or hot curler, usually heat-absorbing polymers, such as those marketed by Croda as Mirustyle® MFP (quaternary starch), and (viii) UV protective agents for protecting hair or pharmaceutical ingredients from degradation by UV light, such as those sold by Croda as Crodasorb® UV-HPP. It may contain.

[0075] Method of invention According to a second aspect, the present invention relates to a method for treating hair, i) A step of applying a composition to the hair, comprising a first partially hydrolyzed protein component obtained from a potato protein source and a second partially hydrolyzed protein component obtained from a plant protein source other than potatoes, ii) Optionally, the step of rinsing the composition off the hair. The present invention provides a method for treating hair, including [specific details omitted].

[0076] A method for treating hair may include one or more steps selected from bleaching, coloring, straightening, perming, curling, straightening, styling, heat treatment, cleaning, or conditioning of hair. Preferably, a method for treating hair includes bleaching, coloring, shaping, styling, cleaning, or conditioning of hair, more preferably shaping, styling, cleaning, or conditioning, and particularly preferably cleaning or conditioning.

[0077] Hair may be natural, bleached, straightened, or otherwise treated with chemicals. Hair may be African, Asian, European, Caucasian, Hispanic, or other hair types. In its natural state, hair may be straight, wavy, curly, or coiled.

[0078] Preferably, the application of the composition to the hair strengthens the hair, and more preferably, the application of the composition to the hair increases the average total work to break the hair, as measured specifically as described herein.

[0079] The composition may include any of the features described herein.

[0080] Use of the present invention According to a third aspect, the present invention provides for the use of a composition comprising a first hydrolyzed protein component derived from potatoes and a second hydrolyzed protein component obtained from a plant source other than potatoes, for the treatment of hair.

[0081] Hair treatment includes strengthening the hair. Preferably, hair treatment includes increasing the average cross-sectional area of ​​the hair fibers and / or increasing the average total work to break the hair, as measured specifically as described herein. Preferably, hair treatment includes increasing the total work to break the hair, as measured specifically as described herein.

[0082] The composition may include any of the features described herein.

[0083] Any of the features described herein can be combined with any aspect of the present invention. [Examples]

[0084] The present invention will be described by the following non-limiting embodiments. All parts and percentages are given by weight unless otherwise specified.

[0085] Needless to say, all of the above tests and physical properties were determined at atmospheric pressure and ambient / room temperature (i.e., approximately 23-25°C), unless otherwise specified in the referenced test methods and procedures.

[0086] Test method In this specification, the following test methods were used. (i) Viscosity was measured at room temperature (25°C) using a Brookfield Ametek DV-1 viscometer with an appropriate spindle (TC bar). The sample was tested at 10 rpm (0.17 Hz) for 1 minute immediately after preparation and again 24 hours later, and the results were cited in cP (mPa·s). (ii) pH was measured at room temperature (25°C) using a Fisher Scientific Accumet AE150 pH Meter. Depending on the initial pH reading, the pH of the formulation was adjusted to 4.0–5.0 using 10% by weight sodium hydroxide (if the pH was higher) or 10% by weight citric acid solution (if the pH was lower). pH was measured immediately after formulation preparation and again 24 hours later. (iii) The percentage of active substances (by weight) in the sample was calculated by measuring the total nonvolatile substance content and ash content. The total nonvolatile content relative to the known sample weight was determined by removing present moisture and any other volatile components by oven drying at 105°C for 17–19 hours. After cooling in a desiccator, the total nonvolatile content (wt%) of the sample was calculated using the residual weight. For ash content, the known weight of the sample was carefully heated in the presence of air using incremental temperature steps to a temperature of 575–600°C and held at that temperature for 16–18 hours (or longer if necessary). After cooling in a desiccator, the ash content (wt%) of the sample was calculated using the residual weight. The active substance content (wt%) in the sample was then calculated by subtracting the wt% ash from the wt% total nonvolatile content. (iv) The weight-average molecular weight was determined by size-exclusion high-performance liquid chromatography (SE-HPLC). The HPLC instrument and settings used are shown in Table 1 below. (v) The amino acid profile was measured by completely hydrolyzing the sample to its constituent amino acids. The distribution of these amino acids was then quantified via HPLC. (vi) Single hair fiber tensile test data were measured using a Miniature Tensile Tester (MTT686) equipped with an automated loading system (model ALS1500) and a fiber dimensional analysis system (model FDAS770) from Diastron Ltd. (Hants, Andover, UK) in a controlled environment chamber. Fifty random single fibers were first prepared from each treated hair bundle for testing using Diastron Ltd.'s AAS 1600 (automated assembly system). Each hair fiber sample had a length of 30 mm. The prepared hair fiber samples were then loaded onto a rotating sample tray and pre-equilibriumized for 2 hours at 50% relative humidity (RH) and room temperature (25°C) before testing. After a 2-hour pre-equilibrium period, each fiber sample was automatically transferred from the sample tray to the FDAS770 using the ALS1500. Since the FDAS770 employs a laser micrometer, the dimensions (cross-sectional area in square microns) of the fiber sample were measured by scanning three sections along the length of the fiber. The fiber sample was then returned to the sample tray, where a pneumatic rod held one end of the fiber sample taut, while a pneumatic jaw with a 2kg load cell gripped the other end. The hair fiber sample was then slowly stretched to a 2% stretch at a stretching rate of 20mm / min. After each fiber sample had been stretched to 2%, the same fiber sample was stretched until the fiber reached its breaking point. At the breaking point, each fiber sample generated a stress-strain curve. Data for the total work done to break (measured in joules) was generated. The data is defined as the integral area under the stress-strain curve, or the maximum work required to break the hair fiber sample. [Table 1]

[0087] Example 1: Preparation of Samples B to G according to the present invention Samples B to G according to the present invention were prepared as described below, and these compositions are shown in Table 2 below.

[0088] Sample B The potato protein concentrate was added to water and mixed until well dispersed. The resulting dispersion was heated to the desired temperature before adjusting the pH with a sodium hydroxide solution. Hydrolysis of the potato protein was catalyzed by stirring at the desired temperature and pH range using enzymes (carbohydrase and protease), thereby achieving a typical weight-average molecular weight of approximately 600-800 Da. Following hydrolysis, the pH of the hydrolysis mixture was lowered to acidity by adding a hydrochloric acid solution, and the enzymes were denatured by heating. The protein hydrolysate was purified by filtration through activated carbon. The resulting dilute hydrolyzed protein solution was then concentrated to the desired active substance content (15-25% by weight) and stored.

[0089] Wheat protein concentrate was added to water and mixed until well dispersed. The resulting dispersion was heated to the desired temperature before adjusting the pH with a sodium hydroxide solution. Hydrolysis of the wheat protein was catalyzed by stirring at the desired temperature and pH range using a protease enzyme. Following hydrolysis, the pH of the hydrolysis mixture was lowered to acidity by adding a hydrochloric acid solution, and the enzyme was denatured by heating. The protein hydrolysate was purified by filtration using activated carbon and ion exchange. The resulting dilute hydrolyzed protein solution was then concentrated to the desired active substance content (15-25% by weight) and stored.

[0090] Sample B was prepared by blending a hydrolyzed potato protein solution and a hydrolyzed wheat protein solution in a weight ratio of 2:1 based on the content of active substances.

[0091] Sample C Sample C was prepared in the same manner as Sample B, but using a weight ratio of 1:1 based on the active substance content.

[0092] Sample D Hydrolyzed potato protein was prepared as shown in sample B.

[0093] The pea protein concentrate was added to water and mixed until well dispersed. The resulting dispersion was heated to the desired temperature before adjusting the pH with a sodium hydroxide solution. Hydrolysis of the pea protein was catalyzed using a protease enzyme by stirring at the desired temperature and pH range, thereby achieving a typical weight-average molecular weight of approximately 800–1500 Da. Following hydrolysis, the pH of the hydrolysis mixture was lowered to acidity by adding a hydrochloric acid solution, and the enzyme was denatured by heating. The protein hydrolysate was purified by filtering through activated carbon. The resulting dilute hydrolyzed protein solution was then concentrated to the desired active substance content (15–25% by weight) and stored.

[0094] Sample D was prepared by blending hydrolyzed potato protein and hydrolyzed pea protein in a 1:1 weight ratio based on the content of active substances.

[0095] Sample E Hydrolyzed potato protein was prepared as shown in sample B.

[0096] The cottonseed protein concentrate was added to water and mixed until well dispersed. The resulting dispersion was heated to the desired temperature before adjusting the pH with a sodium hydroxide solution. Hydrolysis of the cottonseed protein was catalyzed using a protease enzyme by stirring for a predetermined time at the desired temperature and pH range. Following hydrolysis, the pH of the hydrolysis mixture was lowered to acidity by adding a hydrochloric acid solution, and the enzyme was denatured by heating. The protein hydrolysate was purified by filtration. The resulting dilute hydrolyzed protein solution was then concentrated to the desired active substance content (15-25% by weight) and stored.

[0097] Sample E was prepared by blending hydrolyzed potato protein and hydrolyzed cottonseed protein in a 1:1 weight ratio based on the content of active substances.

[0098] Sample F Sample F was prepared in the same manner as sample D, but using a weight ratio of 2:1 based on the active substance content.

[0099] Sample G Sample G was prepared in the same manner as sample D, but using a weight ratio of 1:2 based on the active substance content. [Table 2]

[0100] Example 2: Comparative Products Comparative products were obtained as shown in Table 3 below. [Table 3]

[0101] Example 3: Amino Acid Profile Samples B to G and comparative product 2 of the present invention were completely hydrolyzed to obtain their constituent amino acids, and then the distribution of these amino acids (weight %) relative to the total weight of amino acids in the sample was quantified by HPLC analysis. These amino acid profiles are shown in Table 4 below. [Table 4]

[0102] The amount of cystine in plant-derived samples B-G was found to be less than that in comparative product 2, which was hydrolyzed keratin derived from animals. However, as seen in Example 4, hair strength (demonstrated by improved total work to breakage) was increased by samples B-G compared to comparative product 2.

[0103] Example 4: Hair Tensile Test Hair samples were treated, and tensile tests were performed on them using the following procedure. a) Immerse each hair strand (regular bleached Caucasian hair, 1.0 cm wide, from the same lot) in a dilute solution containing 1 weight percent of the active substance of each sample for 1 hour. b) Untreated control hair tufts were also immersed in deionized (DI) water for 1 hour. c) After one hour, each tuft of hair was rinsed for 30 seconds with lukewarm water flowing at a constant rate. d) Each treated tuft of wool was air-dried overnight in a controlled humidity environment set at 50% RH.

[0104] Hair tensile strength test data were measured as described in the section on the test method above. Results were obtained for 50 random single fibers from each pre-bleached human hair stalk. Each fiber was treated with aqueous solutions containing 1% by weight of the active substance of comparative products 1 and 2, as well as samples B to G of the present invention. Untreated bleached hair fibers were also tested. The average results are shown in Table 5 below. [Table 5]

[0105] As can be seen from Table 5, the average cross-sectional area of ​​hair fibers treated with samples B to G is increased compared to untreated fibers or comparative products 1 and 2. This indicates an increase in the hair's substanceivity (direct bonding ability). Furthermore, the work required to break hair fibers treated with samples B to G is also increased. This indicates that the hair is strengthened.

[0106] Example 5: Hair Conditioner Formulation The basic hair conditioner formulation was manufactured as shown in Table 6 below. [Table 6]

[0107] The following basic hair conditioner formulations, as shown in Table 7 below, were prepared and tested for viscosity and pH as described in the test method above. [Table 7]

[0108] These basic hair conditioner formulations were tested using the following procedure. a) Each conditioner was applied in controlled doses with a conditioner:hair ratio of 2.5:10 w / w according to the standardized PVCS protocol PVCS-002. b) Massage each conditioner into the hair for 1 minute. c) The conditioner was left on the hair for 20 minutes before rinsing. d) After 20 minutes, each tuft of hair was rinsed for 30 seconds with lukewarm water flowing at a constant rate. e) Each treated tuft of wool was air-dried overnight in a controlled humidity environment set at 50% RH.

[0109] Next, a tensile test was conducted as described in the section on test methods above. The results are shown in Table 8 below. [Table 8]

[0110] As can be seen from Table 8, the average cross-sectional area of ​​hair fibers treated with conditioners containing samples C and D increased compared to the placebo conditioner. This indicates an increase in hair substanceivity. Furthermore, the work required to break hair fibers treated with conditioners containing samples C and D also increased. This indicates that the hair was strengthened.

[0111] Example 6: Personal care formulation Sample D was included in various personal care formulations shown in Tables 9-11 below. All of these formulations passed stability tests conducted at 50°C for one month, followed by five 24-hour freeze-thaw cycles. [Table 9]

[0112] Preparation steps for shampoo Add water to the main beaker. Add the remaining ingredients one at a time, mixing thoroughly. Adjust the pH if necessary. [Table 10]

[0113] Preparation procedure for conditioner Add water to the main beaker. Begin mixing using a propeller blade and heat to 80°C. Once the water reaches 80°C, add SP Rejuvasoft MBAL and mix rapidly for 10-15 minutes. Begin cooling to 60°C and hold at this temperature for another 15 minutes. The emulsion should appear smooth and particle-free. Once the emulsion appears smooth, continue cooling to room temperature. Below 40°C, add the partial B components one at a time, mixing thoroughly. Adjust the pH with a 25% citric acid solution if necessary. [Table 11]

[0114] Preparation steps for a hair mask Add component A to the main beaker. Begin mixing with a propeller blade and heat to 80°C. Add component B to a separate beaker and begin heating to 80°C. Once both phases reach 80°C, slowly pour component B into component A while mixing at high speed. Mix at this temperature for 10 minutes, then begin cooling to 60°C. Once the temperature reaches 60°C, switch to a side-sweep blade and reduce the mixing speed. Continue cooling to 40°C. Below 40°C, add component C one at a time and mix thoroughly. Adjust the pH if necessary.

[0115] Needless to say, the present invention is not limited to the details of the embodiments described above, and these embodiments are merely illustrative. Many modifications are possible.

Claims

1. a) A first component which is a partially hydrolyzed protein obtained from a potato protein source, wherein the weight-average molecular weight of the first component is at most 5,000 Da, and the first component, b) A composition comprising a blend with a second component, which is a partially hydrolyzed protein obtained from a plant protein source other than potatoes, wherein the weight-average molecular weight of the second component is at most 5,000 Da, The composition is such that the weight ratio of the first component to the second component in the blend is 0.6:1 to 1.4:

1. The composition is, in this case, for topical application to hair.

2. The composition according to claim 1, which does not contain protein components obtained from animal protein sources.

3. The composition according to any one of claims 1 to 2, which does not contain protein components obtained from a wheat protein source.

4. The composition according to any one of claims 1 to 3, wherein the second component is obtained from a pea or cottonseed protein source.

5. The composition according to any one of claims 1 to 4, wherein the first component and / or the second component is a chemically unmodified hydrolyzed protein.

6. The composition according to any one of claims 1 to 5, wherein the composition is a topical composition for application to hair.

7. The composition according to any one of claims 1 to 6, comprising at least 60% by weight of water based on the total weight of the composition.

8. A composition according to any one of claims 1 to 7, and a cleansing agent, hair conditioning agent, hair styling agent, anti-dandruff agent, hair growth stimulant, fragrance, sunscreen, sunblock, pigment, moisturizer, film-forming agent, hair dye, makeup agent, thickener, emulsifier, moisturizer, emollient, preservative, deodorizing agent, dermatologically acceptable carrier, surfactant, abrasive, absorbent, fragrance, colorant, essential oil, astringent, acne preventative, anticoagulant, defoaming agent, antioxidant, binder, enzyme, A personal care formulation comprising at least one component selected from enzyme inhibitors, enzyme activators, coenzymes, plant extracts, ceramides, buffers, bulking agents, chelating agents, cosmetic biocides, topical analgesics, substance-enhancing agents, opacifiers, pH adjusters, reducing agents, metal ion sequestering agents, skin bleaching and / or whitening agents, skin conditioning agents, skin analgesics and / or healing agents, skin treatment agents, vitamins, or preservatives, wherein the personal care formulation is for topical application to hair.

9. A hair care formulation comprising the composition according to any one of claims 1 to 7, and at least one component selected from a shine enhancer, moisturizer, herbal additive, hair strengthener, vitamin additive, colorant, hair thickener, setting / styling agent, UV absorber, silicone oil, essential oil, and fragrance, thickener or viscosity enhancer, detergent, stabilizer, emollient, chelating agent, metal ion sequestering agent, preservative, bactericide, antioxidant / radical scavenger, antistatic agent, conditioning agent, detangling component, emulsifier or dispersant, wherein the hair care formulation is for topical application to hair.

10. A method for treating hair, A composition comprising a blend of a first partially hydrolyzed protein component obtained from a potato protein source, wherein the weight-average molecular weight of the first component is at most 5,000 Da, and a second partially hydrolyzed protein component obtained from a plant protein source other than potatoes, wherein the weight-average molecular weight of the second component is at most 5,000 Da, Step 1: Apply the composition to the hair, wherein the weight ratio of the first component to the second component in the blend is 0.6:1 to 1.4:

1. Methods of treating hair, including [specific treatments].

11. The method according to claim 10, comprising the step of rinsing the composition off the hair.

12. The method according to claim 10, wherein the method comprises one or more steps selected from bleaching, coloring, straightening, perming, curling, straightening, styling, holding, shaping, heat treatment, cleaning, or conditioning of hair.

13. The method according to any one of claims 10 to 12, wherein applying the composition to the hair strengthens the hair.

14. A composition comprising a blend of a composition comprising a first hydrolyzed protein component obtained from a potato protein source, wherein the weight-average molecular weight of the first component is at most 5,000 Da, and a second hydrolyzed protein component obtained from a plant protein source other than potatoes, wherein the weight-average molecular weight of the second component is at most 5,000 Da, Use of the composition for hair treatment, wherein the weight ratio of the first component to the second component in the blend is 0.6:1 to 1.4:

1.

15. The use according to claim 14, wherein the treatment of the hair includes strengthening the hair.

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