Solid conditioner composition

Abstract

To provide a solid conditioner composition that appropriately softens and melts so that an optimum amount is easy to apply, has good elongation, softens the hair after application, softens the hair when rinsing, softens the hair after drying, and has excellent storage stability under high humidity.SOLUTION: Provided is a solid conditioner composition that includes the following ingredients, comprising: (A) 5 to 25 wt.% of a behentrimonium-type cationic surfactant (at least one of methosulfate, chloride, and bromide); (B) 30 to 60 wt.% of at least one selected from higher alcohols having an alkyl chain length of 14 to 22 carbon atoms; (C) 20 to 40 wt.% of at least one selected from ester oils having a melting point of 10 to 30°C; and (D) 5 to 25 wt.% of at least one selected from nonionic surfactants having an HLB value of 12 to 15, where a water content is 10 wt.% or less.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a solid conditioner composition that dissolves appropriately to allow for an optimum amount to be used, is easy to apply in an appropriate amount, spreads well, makes hair soft after application, makes hair soft during rinsing, makes hair soft after drying, has excellent storage stability under high humidity, and has performance equivalent to that of a liquid conditioner. [Background technology]

[0002] In recent years, efforts to reduce packaging by concentrating products have been promoted in light of the Sustainable Development Goals (SDGs). Solidifying liquid products, in particular, can eliminate plastic and simplify packaging, making it a highly desirable form when transportation costs are taken into account. The market for conditioners and treatments is particularly large in hair care products, and solidifying them offers significant benefits. However, solidification can sometimes result in problems with performance and quality degradation. In terms of performance, silicone oils and ester oils, which provide hair lubrication, are primarily liquid, making them difficult to incorporate in large quantities, resulting in poor performance. Furthermore, in terms of quality, the product may dissolve significantly upon contact with water during use, or may not dissolve easily, leading to inconsistent usage, resulting in poor performance. Patent Document 1 proposes a solid hair conditioner composition containing (i) at least 5% by weight of a cationic surfactant and (ii) at least 5% by weight of a fatty alcohol material, and less than 80% by weight of water. This solid hair conditioner composition has performance similar to that of a liquid conditioner when used in an appropriate amount, but it may be highly hydrophobic and may not dissolve easily, making it difficult to easily dispense the appropriate amount, and in some cases, satisfactory performance may not be obtained. That is, a solid conditioner composition needs to dissolve and disintegrate appropriately so that an optimum amount can be used, and to be easily applied in an appropriate amount, but there have been cases where this has not been satisfied. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2004-534807 Summary of the Invention [Problem to be solved by the invention]

[0004] In order to solve these problems, a main object of the present invention is to provide a solid conditioner composition that dissolves and disintegrates appropriately to allow for an optimum amount to be used, is easy to apply in an appropriate amount, spreads well, leaves hair soft after application, leaves hair soft during rinsing, leaves hair soft after drying, has excellent storage stability under high humidity conditions, and has performance equivalent to that of a liquid conditioner. [Means for solving the problem]

[0005] As a result of extensive research to solve the above problems, the present inventors have discovered that a solid conditioner composition containing an appropriate amount of a nonionic surfactant having a specific HLB value dissolves and disintegrates appropriately to allow for an optimal amount to be used, is easy to apply in an appropriate amount, spreads well, leaves hair soft after application, soft during rinsing, and soft after drying, has excellent storage stability under high humidity conditions, and has performance equivalent to that of a liquid conditioner, thereby completing the present invention.

[0006] That is, the present invention is as follows. (1) (A) 5 to 25% by weight of a behentrimonium-type cationic surfactant (at least one of methosulfate, chloride, and bromide), (B) 30 to 60% by weight of at least one higher alcohol selected from those having an alkyl chain length of 14 to 22 carbon atoms, (C) 20 to 40% by weight of at least one ester oil selected from ester oils having a melting point of 10 to 30°C, (D) 5 to 25% by weight of at least one nonionic surfactant selected from those having an HLB value of 12 to 15; and a water content of 10% by weight or less. (2) (1) A solid conditioner composition in which component (A) is behentrimonium methosulfate. (3) Furthermore, in the solid conditioner composition of (1) or (2), the component (B) is at least one selected from higher alcohols having an alkyl chain length of 16 to 18 carbon atoms. (4) Furthermore, in the solid conditioner composition of any one of (1) to (3), the component (C) is at least one selected from ester oils having a melting point of 15 to 25°C. (5) Furthermore, in the solid conditioner composition of any one of (1) to (4), the component (D) is at least one selected from nonionic surfactants having an HLB value of 13 to 14. (6) Furthermore, the solid conditioner composition is any one of (1) to (5), which has a water content of 3% by weight or less. [Effects of the Invention]

[0007] According to the present invention, by containing specific components (A) to (D), it is possible to provide a solid conditioner composition that dissolves and disintegrates appropriately to allow for an optimal amount to be used, is easy to apply in an appropriate amount, spreads well, leaves hair soft after application, leaves hair soft during rinsing, leaves hair soft after drying, has excellent storage stability under high humidity conditions, and has performance equivalent to that of a liquid conditioner. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described. Examples of the behentrimonium cationic surfactant (component A) include behentrimonium methosulfate, behenamidopropyltrimonium methosulfate, behentrimonium chloride, and behentrimonium bromide. Furthermore, surfactants having multiple alkyl groups that contain the above-mentioned components may also be used. Examples include di-soybean oil fatty acid ethyl hydroxyethylmonium methosulfate, di-rapeseed oil fatty acid ethyl hydroxyethylmonium methosulfate, bis(soybean oil fatty acid / rapeseed oil fatty acid) ethyl hydroxyethylmonium methosulfate, bis(ethyl behenate PPG-3)dimonium methosulfate, and PEG-2 dimeadowfoamamido ethylmonium methosulfate. One or more behentrimonium cationic surfactants may be used in combination.

[0009] Cationic surfactants are important components that determine the performance of conditioners, but they are highly hydrophilic and can sometimes cause the product to melt and fall apart. Therefore, after considering ways to prevent melting and falling apart and optimizing the alkyl group, it became clear that a behenyl type is desirable. If component (A) is not blended at 5% by weight or more, hair flexibility and manageability may be insufficient from application to drying. Furthermore, if it exceeds 25% by weight, the product becomes highly hydrophilic, and melting and quality may be lost. Furthermore, 10 to 20% by weight is more desirable, as it provides a good balance between performance and melting. Furthermore, behentrimonium methosulfate is more desirable, as it spreads well upon application.

[0010] Examples of the higher alcohol having an alkyl chain length of 14 to 22 carbon atoms, which is the component (B), include cetanol, stearyl alcohol, myristyl alcohol, palmityl alcohol, arachyl alcohol, behenyl alcohol, etc. One or more higher alcohols may be used in combination. The solid conditioner composition of the present invention can improve hair softness after application, rinsing, and drying, and can prevent dissolution during storage. A higher alcohol with an alkyl chain length of 16 to 18 carbon atoms is more preferable because it further improves hair softness. If the higher alcohol is not blended in at least 30 wt%, it may not be possible to prevent dissolution due to the influence of other low-melting-point components, and 40 wt% or more is even more preferable. Conversely, if the higher alcohol is blended in at more than 60 wt%, it may not dissolve during use and may not achieve its intended performance. In other words, 40 to 60 wt% is more preferable because it strikes a balance between preventing dissolution and conditioner performance.

[0011] Examples of the ester oil having a melting point of 10 to 30°C as component (C) include coconut oil, palm kernel oil, palm olein, meadowfoam oil, jojoba oil, butyl stearate, isopropyl palmitate, ethylhexyl stearate, phytosteryl isostearate, etc. One or more types of ester oils may be used in combination. If the melting point is less than 10°C, it may seep out onto the surface and impair quality. If the melting point is more than 30°C, it may not melt during use and may not provide its intended performance. A melting point of 15 to 25°C is more preferable. If the amount of ester oil is less than 20% by weight, the hair may not be soft enough, and if it exceeds 40% by weight, the hair may not stretch when applied.

[0012] Examples of the nonionic surfactant (D) having an HLB value of 12 to 15 include PEG-20 glyceryl isostearate, PEG-50 glyceryl triisostearate, PPG-2-deceth-30, PEG-40 glyceryl isostearate, PEG-100 castor oil, ceteth-30, PEG-30 stearate, PEG-20 sorbitan cocoate, laureth-20, PEG-30 glyceryl stearate, isoceteth-25, hydrogenated dimer dilinoleth-60, steareth-30, PEG-80 hydrogenated castor oil, and PEG-30 glyceryl isostearate. Glyceryl, Ceteth-25, PEG-60 Glyceryl Diisostearate, PCA Glycereth-25 Isostearate, PPG-2-Deceth-20, Isosteareth-25, Steareth-25, PEG-25 Glyceryl Isostearate, Beheneth-30, Isoceteth-20, Laureth-15, PEG-20 Isostearate, Octyldodeceth-25, Oleth-23, Cholesterol-30, Ceteth-20, PEG-20 Stearate, Sorbeth-150 Hexastearate, PEG-25 Butylene Glycol Isostearate, PEG-20 Glyceryl Stearate, Polyisobutene Cholesterol 80, Isoceteth-20, Hydrogenated Dimer Dilinoleth-40, Oleth-20, Steareth-20, PPG-2-Deceth-15, Ceteth-17, Decyltetradeceth-25, Laureth-12, Octyldodeceth-20, Cholesterol-24, PEG-50 Hydrogenated Castor Oil, Isoceteth-15, PEG-60 Glyceryl Triisostearate, PEG-60 Glyceryl Trioleate, Ceteth-15, PEG-60 Hydrogenated Castor Oil Laurate, PEG-15 Glyceryl Stearate, Beheneth-20, PCA PEG-60 Hydrogenated Castor Oil Isostearate, La Ureth-10, PPG-2-deceth-12, isosteareth-15, cholesteatum-20, oleth-15, hydrogenated dimer dilinoleth-30, steareth-15, decyltetradeceth-20, PEG-40 hydrogenated castor oil, PEG-15 glyceryl isostearate, octyldodeceth-16, PEG-20 dilaurate, PEG-50 trimethylolpropane triisostearate, PEG-50 glyceryl trioleate, laureth-9, PEG-12 isostearate, PEG-50 hydrogenated castor oil laurate, PEG-30 glyceryl diisostearate,Polyglyceryl-10 cocoate, etc. One or more nonionic surfactants may be used in combination. Nonionic surfactants with these specific HLB values are known to have strong emulsifying power. Liquid conditioners are generally liquids made by emulsifying cationic surfactants, higher alcohols, and ester oils. The individual components alone do not provide sufficient conditioning performance; their performance is only realized when they are emulsified. On the other hand, solid conditioners contain a low amount of water, and their performance is insufficient when used as is. Therefore, adding the specific nonionic surfactants listed above promotes emulsification, including the water that comes into contact with the conditioner during use, achieving performance equivalent to that of liquid conditioners. Emulsification is promoted by setting the nonionic surfactant's HLB value between 12 and 15, with an HLB value between 13 and 14 being more preferable. If the HLB value is less than 12 or more than 15, emulsification may be difficult to achieve. The nonionic surfactant can be blended in an amount of 5 to 25% by weight. If it is less than 5% by weight, it may be difficult to promote emulsification, and the desired performance may not be achieved. If it exceeds 25% by weight, it may dissolve more than the optimum amount and collapse.

[0013] Water dissolves water-soluble ingredients and may be added. The water content in the solid conditioner composition is preferably 10% by weight or less, and even 3% by weight or less, and may not be added at all. If the water content exceeds 10% by weight, the solid may soften, making molding difficult and causing the product to disintegrate.

[0014] The solid conditioner composition of the present invention can contain ingredients that are typically used in liquid conditioners. For example, Silicones such as highly polymerized dimethylpolysiloxane, dimethylpolysiloxane oil, cyclic silicone, amino-modified silicone, polyether-modified silicone, methylphenylpolysiloxane, fatty acid-modified silicone, alcohol-modified silicone, alkoxy-modified silicone, epoxy-modified silicone, fluorine-modified silicone, and alkyl-modified silicone; Moisturizing agents such as trehalose, hyaluronic acid, collagen, carboxymethyl chitosan succinamide, Extracts such as aloe vera extract, Scutellaria root extract, Panax ginseng extract, persimmon tannin extract, crab rose extract, chamomile flower extract, virginiana extract, pear branch extract, centifolia rose extract, tea leaf extract, heartflower extract, witch hazel extract, tilia cordata extract, mulberry extract, cornflower extract, yuzu extract, Roman chamomile extract, and royal jelly extract, Natural extracts such as turmeric extract, ginseng extract, bladderwrack extract, beech bud extract, rice bran extract, camellia extract, peach kernel extract, sophora arvensis extract, chlorella extract, marjoram extract, ginseng extract, shell ginger leaf extract, Phellodendron bark extract, Coptis japonica extract, Pueraria lobata extract, Lithospermum root extract, peony extract, Swertia japonica extract, birch extract, sage extract, loquat extract, carrot extract, aloe extract, mallow extract, iris extract, grape extract, coix seed extract, loofah extract, lily extract, saffron extract, Cnidium rhizome extract, ginger extract, St. John's wort extract, rosemary extract, garlic extract, chili pepper extract, and burnet extract; natural extracts; Proteins or hydrolysates thereof obtained from nacreous shells or pearls, proteins or hydrolysates thereof obtained from silk, protein-containing extracts obtained from legume seeds, Polymer compounds such as cationized cellulose and hydroxylated cellulose, anti-dandruff agents such as zinc pyrithione, trichlorocarbanilide, sulfur, isopropylmethylphenol, and benzalkonium chloride, emulsifiers, opacifiers, sequestering agents, UV absorbers, antioxidants, preservatives, powdered ingredients, blood circulation promoters, local stimulants, hair follicle activators, hair nutrients, anti-androgenic agents, antiseborrheic agents, anti-aging agents, emollients, keratolytic agents, bactericides, Preservatives such as phenoxyethanol and parabens, Examples of the agents include anti-inflammatory agents, anti-inflammatory agents, cooling agents, amino acids, vitamins, hair growth agents such as herbal extracts, pH adjusters, pigments, dyes, coloring materials, and fragrances. However, highly hydrophilic ingredients and ingredients that are liquid at room temperature can cause dissolution and collapse, so they are blended in to a level that does not affect performance. Also, the water content in the solid conditioner composition should not exceed 10% by weight.

[0015] The solid conditioner composition of the present invention does not exhibit flowability at room temperature (25°C) and normal pressure (1 atm), and its shape is not particularly limited. Specific examples of the shape include sticks, rods, plates, and those poured into containers. These various solid conditioner compositions can be prepared according to conventional methods. For example, all ingredients are heated to above their melting point and mixed uniformly, and then water-soluble components are added while cooling. The molten mixture is poured into a predetermined container such as a jar, or into a metal or resin dish, and cooled or allowed to cool to form a solid conditioner composition. Alternatively, the solid conditioner composition can be filled into a stick container to form a stick. [Example]

[0016] The effects of the present invention will be explained in more detail with reference to the following examples, but the present invention is not limited to these examples. The amounts in the formulations described below are expressed in weight percent relative to the total amount unless otherwise specified. The solid conditioner compositions of the present invention in the following examples and comparative examples were evaluated as follows.

[0017] The solid conditioner compositions shown in Tables 1 and 2 were prepared according to the following manufacturing procedures. (Manufacturing Procedure) (1) Heat all ingredients shown in Tables 1 and 2 to approximately 90°C and mix uniformly. (2) Pour the mixture into a cylindrical tube with a diameter of 5 cm and a height of 50 cm, with a lid on the bottom, and allow it to cool. (3) After cooling to room temperature and solidifying, the mixture was extruded from the tube and cut into 3 cm pieces, and the following evaluations were carried out. All of the solid conditioner compositions shown in Tables 1 and 2 were solid at room temperature.

[0018] (Performance evaluation) (Measurement of coating amount) Human hair (Beaulux Co., Ltd., human black hair (straight at the roots), 30 cm long) was bundled into 50 g hair bundles and subjected to the following evaluations. (1) Wet the hair bundle evenly with 20 mL of purified water. (2) After measuring the weight of the solid conditioner prepared according to the manufacturing procedure, rub it back and forth twice on a strand of hair. (3) The weight of the solid conditioner is measured again to determine the amount applied to the hair strand. (Measurement of elongation when applied) The performance evaluation was carried out by eight female expert panelists who used the hair strands on which the application amounts of the solid conditioner compositions of the Examples and Comparative Examples had been measured, and rated on a 5-point scale. The average of the results was shown. Poor spreadability and unevenness: 1 point Poor spread and unevenness: 2 points Stretches evenly: 3 points Good spreadability and blends well with hair strands: 4 points Very good spreadability and quickly blends into hair strands: 5 points In addition, in the cases where the application amount was 0.05 g or less, the application amount was not sufficient to evaluate the elongation, so the evaluation was discontinued.

[0019] (sensory evaluation) The following evaluations were carried out by six female expert panelists who used the solid conditioner compositions of the Examples and Comparative Examples for five days and performed various evaluations, and the averages of the results are shown as the results. (Ease of application) Difficult to apply: 1 point Slightly difficult to apply: 2 points Can be applied but spreads poorly: 3 points Easy to apply and spread: 4 points Easy to apply and spreads well: 5 points (Hair softness after application) Worse than before application: 1 point Slightly worse than before application: 2 points No change from before application: 3 points Slightly softer than before application: 4 points Softer than before application: 5 points (Hair softness when rinsing) Worse than before application: 1 point Slightly worse than before application: 2 points No change from before application: 3 points Slightly softer than before application: 4 points Softer than before application: 5 points (Hair softness after drying) Worse than before use: 1 point Slightly worse than before use: 2 points Same as before use: 3 points Slightly softer than before use: 4 points Softer than before use: 5 points

[0020] (Quality Evaluation) The storage stability under high humidity conditions was confirmed, assuming storage conditions in a bathroom. Storage conditions: The sample was left in a constant temperature and humidity room at a room temperature of 25°C and a humidity of 80% for 24 hours, and the surface condition was checked. ×: Significant changes were observed on the surface (e.g., severe disintegration, seepage of ingredients onto the surface). △: Changes that cause quality problems were observed on the surface (e.g., melting and oozing). ○: Slight changes were observed on the surface, but this did not affect use. ◎: No change was observed on the surface.

[0021] Example [Table 1]

[0022] Behentrimonium Methosulfate KCI BTMS 225KC (Composition: Behentrimonium methosulfate 25% by weight, stearyl alcohol 25% by weight, cetanol 50% by weight) Behentrimonium Chloride Evonik Japan VARISOFT(R) BT85 Pellets Stearyl alcohol Kao Corporation Kalcol (registered trademark) 8098 Cetanol Kao Corporation Kalcol 6098 Palm oil, Nikko Chemicals, NIKKOL® Trifat® C-24 (melting point 22-26°C) Isopropyl myristate Nikko Chemicals NIKKOL IPN-EX (Melting point below 9°C) Glycol stearate Nikko Chemicals NIKKOL EGMS-70V (Melting point 57-63℃) PEG-20 Glyceryl Isostearate, Nippon Emulsion Co., Ltd., Emalex® GWIS-120 (HLB 13) PEG-50 Glyceryl Triisostearate, Nippon Emulsion Co., Ltd., Emalex GWIS-350 (HLB 12) PEG-50 Glyceryl Isostearate, Nippon Emulsion Co., Ltd., Emalex GWIS-150 (HLB 16)

[0023] Comparative Example [Table 2]

[0024] Evaluation results Examples 1 to 9, which were prepared within the scope of the solid conditioner composition of the present invention, dissolved and disintegrated appropriately to provide an optimal amount for use, were easy to apply in an appropriate amount, spread well, left hair soft after application, soft during rinsing, and soft after drying, and had excellent storage stability under high humidity conditions. On the other hand, in Comparative Example 1, where the HLB value of the (D) component was outside the range, the hair was not soft after application, was not soft when rinsed, and was not soft after drying. In Comparative Example 2, where the moisture content exceeded the range, the storage stability under high humidity was poor. In Comparative Example 3, where the (D) component was below the range, the spread was poor upon application, the application was difficult, the hair was not soft after application, the hair was not soft when rinsed, and the hair was not soft after drying. In Comparative Example 4, where the (C) component was below the range, the hair was not soft after application, the hair was not soft when rinsed, and the hair was not soft after drying. In Comparative Example 5, where the (A) component was above the range, the storage stability under high humidity was poor. In Comparative Example 6, where the (C) component was above the range, the application amount was low, the spread could not be evaluated, the application was difficult, the hair was not soft after application, the hair was not soft when rinsed, and the hair was not soft after drying. In Comparative Example 7, where the (D) component was above the range, the storage stability under high humidity was poor. In Comparative Example 8, where the melting point of component (C) was below the range, storage stability under high humidity conditions was poor. In Comparative Example 9, where the melting point of component (C) was above the range, the amount applied was low, elongation could not be evaluated, application was difficult, and the hair was not soft after application, was not soft when rinsing, and was not soft after drying. [Industrial Applicability]

[0025] The solid conditioner composition of the present invention dissolves and disintegrates appropriately to provide an optimum amount for use, is easy to apply in an appropriate amount, spreads well, leaves hair soft after application, leaves hair soft during rinsing, leaves hair soft after drying, has excellent storage stability under high humidity, and has performance equivalent to that of a liquid conditioner, thereby enhancing the commercial value of solid conditioners, solid rinses, solid treatments, etc.

Claims

1. (A) 5 to 25% by weight of a behentrimonium-type cationic surfactant (at least one of methosulfate, chloride, and bromide), (B) 30 to 60% by weight of at least one higher alcohol selected from those having an alkyl chain length of 14 to 22 carbon atoms, (C) 20 to 40% by weight of at least one ester oil selected from ester oils having a melting point of 10 to 30°C, (D) 5 to 25% by weight of at least one nonionic surfactant selected from the group consisting of ethylene oxide condensed polyoxyethylene polyhydric alcohol fatty acid esters, having an HLB value of 12 to 15; A solid conditioner composition comprising the above and having a water content of 10% by weight or less.

2. 2. The solid conditioner composition according to claim 1, wherein component (A) is behentrimonium methosulfate.

3. 3. The solid conditioner composition according to claim 1, wherein component (B) is at least one selected from higher alcohols having an alkyl chain length of 16 to 18 carbon atoms.

4. The solid conditioner composition according to any one of claims 1 to 3, wherein component (C) is at least one selected from ester oils having a melting point of 15 to 25°C.

5. The solid conditioner composition according to any one of claims 1 to 4, wherein the component (D) is at least one selected from the nonionic surfactants having an HLB value of 13 to 14.

6. The solid conditioner composition according to any one of claims 1 to 5, further comprising a composition having a water content of 3% by weight or less.

Images