Solid conditioner composition

Abstract

To provide a solid conditioner composition that can be cut and molded, which is suitable for mass production, and offers superior storage stability and use feeling.SOLUTION: A solid conditioner composition comprises (A) 5-25 wt.% of at least one of quaternary ammonium salt type cationic surfactants, (B) 10-35 wt.% of at least one selected from higher alcohols having alkyl chains with carbon numbers ranging from 14 to 22, (C) 10-40 wt.% of at least one selected from glycerol fatty acid esters, and (D) 10-30 wt.% of at least one selected from polyoxyethylene glycerol fatty acid esters and polyglyceryl fatty acid esters, which are pasty or solid at room temperature (25°C). The components (C) and (D) have an average HLB ranging from 3 to 8.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a solid conditioner composition that can be cut and molded into shapes suitable for mass production, has good stability, and provides an excellent feel when used. [Background technology]

[0002] In recent years, efforts have been made to reduce packaging by concentrating products in line with the Sustainable Development Goals (SDGs). Solidifying liquid products, in particular, is expected to reduce waste by eliminating plastic and simplifying packaging. It is also expected to reduce transportation costs and CO2 emissions by reducing product weight and making containers more compact. The market for conditioners and treatments is particularly large for hair care products, and solidifying them offers significant benefits. Consumers are also seeing the use of solidified products as a familiar SDG activity. However, solidifying products makes it impossible to incorporate high amounts of silicone oils and other oils that smooth hair, resulting in inferior performance compared to liquid conditioners and treatments.

[0003] Claim 1 of 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 because it is highly hydrophobic and does not dissolve easily, it is sometimes difficult to use the appropriate amount, and a satisfactory feel during use may not be obtained. Furthermore, at high temperatures, low-melting-point components may melt and rise to the surface. If the hydrophilicity is enhanced to improve the feel of use, excessive melting and disintegration due to humidity during storage in the bathroom may occur, and hydrophobic components may rise to the surface. Therefore, there is room for improvement in achieving both feel of use and storage stability.

[0004] On the other hand, a widely used molding method involves pouring a molten liquid into individual molds and solidifying it to form a mold. However, this method requires preparing molds according to the number of products to be produced, and also requires a large amount of static space for solidification, making mass production problematic. A method suitable for mass production is, for example, pouring a molten liquid into a rectangular tube, and cutting and molding it after solidification. Using this method eliminates the need for molds for the number of products to be produced. Furthermore, using a rectangular tube allows for effective use of space. However, the main components of hair conditioner compositions, such as cationic surfactants and higher alcohols, are generally hard and brittle, which can lead to breakage during cutting, making cutting a molding method problematic. That is, currently, no solid conditioner composition has been found that can be cut and molded to be suitable for mass production, has good storage stability under high temperature and high humidity conditions, and provides an excellent feel when used. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Special Publication No. 2004-534807 Summary of the Invention [Problem to be solved by the invention]

[0006] To provide a solid conditioner composition which can be cut and molded to be suitable for mass production, has excellent storage stability under high temperature and high humidity conditions, and provides excellent feeling when used. [Means for solving the problem]

[0007] As a result of extensive research aimed at solving the above-mentioned problems, the present inventors discovered that a solid conditioner composition comprising an appropriate combination of a specific surfactant, a specific higher alcohol, and a specific glycerin fatty acid ester derivative in appropriate amounts can be cut and molded to be suitable for mass production, and also has excellent storage stability and usability required for a solid conditioner, leading to the development of the present invention.

[0008] That is, the present invention is as follows. (1) A solid conditioner composition comprising (A) 5 to 25% by weight of at least one quaternary ammonium salt type cationic surfactant, (B) 10 to 35% by weight of at least one selected from higher alcohols having an alkyl chain length of 14 to 22 carbon atoms, (C) 10 to 40% by weight of at least one or more selected from glycerin fatty acid esters, and (D) 10 to 30% by weight of at least one or more selected from polyoxyethylene glycerin fatty acid esters and polyglycerin fatty acid esters that are pasty to solid at room temperature (25°C), wherein the average HLB of components (C) and (D) is 3 to 8. (2) The solid conditioner composition of (1), wherein component (A) is a behentrimonium salt-type cationic surfactant. (3) The solid conditioner composition according to (1) or (2), wherein component (B) is at least one selected from higher alcohols having an alkyl chain length of 16 to 18 carbon atoms. [Effects of the Invention]

[0009] According to the present invention, by containing the specific components (A) to (D) in appropriate amounts, it is possible to provide a solid conditioner composition that can be cut and molded into a form suitable for mass production, and that has excellent storage stability under high temperature and high humidity conditions and a good feel when used. DETAILED DESCRIPTION OF THE INVENTION

[0010] The present invention will be explained in more detail below with reference to specific examples, but the present invention is not limited to these examples in any way.

[0011] Hereinafter, an embodiment of the present invention will be described. Examples of the quaternary ammonium salt cationic surfactant of component (A) include behentrimonium methosulfate, steartrimonium methosulfate, cetrimonium methosulfate, behenamidopropyltrimonium methosulfate, ricinoleamidopropyltrimonium methosulfate, babassuamidopropyltrimonium methosulfate, palmamidopropyltrimonium methosulfate, stearyl ethylhexyldimonium methosulfate, dioleoylethyl hydroxyethylmonium methosulfate, distearoyl methyltrimonium methosulfate, ... Aroylethyl hydroxyethylmonium methosulfate, di-soybean oil fatty acid ethyl hydroxyethylmonium methosulfate, di-rapeseed oil fatty acid ethyl hydroxyethylmonium methosulfate, dipermoylethyl hydroxyethylmonium methosulfate, di-hydrogenated permoylethyl hydroxyethylmonium methosulfate, dipalmitoylethyl hydroxyethylmonium methosulfate, bis((isostearoyl / oleoyl)isopropyl)dimonium methosulfate, bis(soybean oil fatty acid / rapeseed oil fatty acid) ethyl hydroxyethylmonium methosulfate Quaternary ammonium methosulfate salts such as hydroxyethylmonium methosulfate, bis(ethyl behenate PPG-3)dimonium methosulfate, PEG-2 dimeadowfoam amide ethylmonium methosulfate, PEG-3 dioleoyl amide ethylmonium methosulfate, PEG-3 distearoyl amide ethylmonium methosulfate, behenyltrimethylammonium chloride (behentrimonium chloride), myristyltrimethylammonium chloride, myristyltrimethylammonium bromide, cetyltrimethylammonium chloride ammonium bromide, cetyltrimethylammonium bromide, stearyltrimethylammonium chloride, stearyltrimethylammonium bromide, behenyltrimethylammonium bromide, myristyldimethylbenzylammonium chloride, cetyldimethylbenzylammonium chloride, stearyldimethylbenzylammonium chloride, 2-decyltetradecyltrimethylammonium chloride, 2-dodecylhexadecyltrimethylammonium chloride, distearyldimethylammonium chloride, and dicetyldimethylammonium chloride are examples of quaternary ammonium halide salts.

[0012] Among the quaternary ammonium salt cationic surfactants used as component (A), behentrimonium salt cationic surfactants are preferred because they are less hydrophilic than other cationic surfactants and, when incorporated into solid conditioners, dissolve and disintegrate to a moderate degree, improving the ease of application of the solid conditioner to hair. Examples of behentrimonium salt cationic surfactants include behentrimonium methosulfate, behenamidopropyltrimonium methosulfate, behentrimonium chloride, and behentrimonium bromide. Furthermore, surfactants having multiple alkyl groups may also contain the above-mentioned components. Furthermore, these surfactants may be used alone or in combination. In particular, behentrimonium chloride is more preferred from the viewpoint of the balance between easy availability and improved application properties.

[0013] The content of component (A) is preferably 5 to 25 wt % of the total composition in terms of the balance between application ease, the feel when used (e.g., finger combability from rinsing to drying), and cuttable formability. If the content of component (A) is less than 5 wt %, the product may not be able to dissolve and break down properly, resulting in poor application and a poor feel when used. If the content exceeds 25 wt %, the product may have poor plasticity, resulting in poor cuttable formability (e.g., cracking during cutting), or may have poor storage stability due to the release of hydrophobic components or excessive dissolution and breakage under the humidity (80%) expected in bathrooms.

[0014] Examples of higher alcohols with alkyl chain lengths of 14 to 22 carbon atoms, which are component (B), include cetanol, stearyl alcohol, myristyl alcohol, palmityl alcohol, arachyl alcohol, and behenyl alcohol. One or more higher alcohols may be used in combination. The use of higher alcohols with 14 to 22 carbon atoms can improve the feel of the hair from rinsing to drying, such as ease of combing, and can provide favorable cuttable formability by imparting appropriate plasticity and hardness, as well as favorable storage stability, such as suppressing the lift-out of low-melting-point components at high temperatures. On the other hand, if the carbon number is less than 14, the melting point of the higher alcohol is low. When used as a solid conditioner, for example, even at high temperatures (40°C) within the practical usage range, some low-melting-point higher alcohols may lift out, resulting in reduced storage stability. Furthermore, if the carbon number exceeds 22, the plasticity may decrease, resulting in reduced cuttable formability, such as cracking during cuttable form. Therefore, higher alcohols with alkyl chain lengths of 14 to 22 carbon atoms are preferred from the viewpoint of storage stability and cut moldability, and those with 16 to 18 carbon atoms are more preferred in order to further improve the feeling when used.

[0015] The content of component (B) in the raw material blend is preferably 10 to 35% by weight, more preferably 15 to 30% by weight, based on the balance of usability, storage stability, and cutting and molding properties as a solid conditioner. If the amount of higher alcohol is less than 10% by weight, storage stability may be reduced due to factors such as a decrease in hardness and the protrusion of low-melting point components due to the influence of other low-melting point components. If the amount of higher alcohol is more than 35% by weight, plasticity may be lost and cutting and moldability may be reduced.

[0016] Examples of glycerin fatty acid esters, component (C), include glyceryl isostearate (HLB: 4.0), glyceryl myristate (HLB: 3.5), glyceryl diisostearate (HLB: 3.0), glyceryl stearate (HLB: 3.0), and glyceryl oleate (HLB: 2.5). Glyceryl stearate (HLB: 3.0) and glyceryl oleate (HLB: 2.5) are particularly preferred because they impart appropriate hardness and good storage stability to solid conditioners. One or more types of glycerin fatty acid esters may be used in combination.

[0017] When blended into a solid conditioner, component (C) imparts plasticity, enabling easy cutting and molding. If the blending amount of component (C) is less than 10% by weight, sufficient plasticity may not be obtained, making it difficult to achieve cuttable formability. If the blending amount exceeds 40% by weight, the feel upon use, such as ease of application and the ease of combing hair from rinsing to drying, may be impaired. Therefore, from the viewpoint of balancing the feel upon use and cuttable formability, the content of component (C) is preferably 10 to 40% by weight, more preferably 15 to 30% by weight, of the total composition of the raw material blend. HLB stands for Hydrophile-Lipophile Balance, and is a concept that quantifies the balance between the hydrophilic and lipophilic groups of a surfactant. Generally, HLB is expressed as a number between 0 and 20, with a higher number indicating higher hydrophilicity. More details on HLB values ​​are provided below. (Journal of the Association of Japanese Cosmetic Chemists, Vol. 8, No. 2, 1974, Use of HLB in the synthesis and manufacture of surfactants, Use of "HLB" in the selection of emulsifiers)

[0018] Component (D) is a polyoxyethylene glycerin fatty acid ester and a polyglycerin fatty acid ester that are paste-like to solid at room temperature (25°C). Examples of polyoxyethylene glycerin fatty acid esters include PEG-5 glyceryl stearate (HLB: 8.0), PEG-10 glyceryl stearate (HLB: 11.0), PEG-15 glyceryl stearate (HLB: 13.0), PEG-20 glyceryl stearate (HLB: 14.0), PEG-4 glyceryl distearate (HLB: 4.0), PEG-4 glyceryl tristearate (HLB: 2.0), PEG-5 glyceryl tristearate (HLB: 3.0), PEG-6 glyceryl tristearate (HLB: 3.0), PEG-10 glyceryl tristearate (HLB: 5.0), PEG-15 glyceryl tristearate (HLB: 7.0), and PEG-20 glyceryl tristearate (HLB: 8.0). Examples of polyglycerin fatty acid esters include polyglyceryl-2 stearate (HLB: 5.0), polyglyceryl-2 oleate (HLB: 5.5), polyglyceryl-4 stearate (HLB: 6.0), polyglyceryl-4 oleate (HLB: 6.0), polyglyceryl-6 stearate (HLB: 9.0), polyglyceryl-10 stearate (HLB: 12.0), polyglyceryl-10 oleate (HLB: 12.0), polyglyceryl-6 tristearate (HLB: 2.5), polyglyceryl-10 tristearate (HLB: 7.5), and polyglyceryl-10 trioleate (HLB: 7.0). Polyoxyethylene glycerin fatty acid esters and polyglycerin fatty acid esters may be used alone or in combination of two or more.

[0019] Incorporating component (D) into a solid conditioner imparts plasticity, similar to component (C), improving cutting and molding. It also inhibits the extrusion of low-melting components at high temperatures, improving storage stability.

[0020] If the content of component (D) is less than 10% by weight, the plasticity may not be sufficiently expressed, resulting in cracking when cut, making it difficult to obtain sufficient cut moldability, or the storage stability may be reduced due to the protrusion of low-melting point components, etc. If the content exceeds 30% by weight, the feel in use, such as ease of application and the ability to run fingers through hair from rinsing to drying, may be impaired. Therefore, the content is preferably 10 to 30% by weight, and more preferably 15 to 25% by weight from the viewpoints of feel in use, storage stability, and cut moldability.

[0021] Although component (C) and component (D) can impart plasticity to the solid conditioner when used alone, combining component (C) and component (D) synergistically improves plasticity and significantly improves cutting and moldability.

[0022] When the components (C) and (D) used in the present invention are combined and blended, their average HLB value is preferably 3.0 to 8.0, more preferably 4.0 to 7.0. If the HLB value is less than 3.0, the water solubility may be reduced, preventing proper dissolution and breaking down. This may result in a decrease in ease of application and a decrease in the feel during use. On the other hand, if the HLB value exceeds 8.0, the composition may become less compatible with other components, resulting in non-uniformity, or the storage stability may be reduced due to lifting of hydrophobic components or excessive dissolution and breaking down under high humidity.

[0023] In addition, ester oils can be appropriately blended to adjust the hardness and feel of the solid conditioner. Examples of ester oils include coconut oil, palm kernel oil, palm olein, meadowfoam oil, shea butter, jojoba oil, butyl stearate, isopropyl palmitate, ethylhexyl stearate, and phytosteryl isostearate. One or more types of ester oils may be used in combination.

[0024] Water may be added as needed to dissolve water-soluble components or water contained in the raw materials. However, 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 or making it impossible to maintain its shape.

[0025] The solid conditioner composition of the present invention can contain ingredients used in ordinary liquid conditioners and solid cleansers to the extent that the efficacy and effects provided by the present invention are not impaired. These ingredients include, but are not limited to, 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; moisturizers such as trehalose, hyaluronic acid, collagen, and carboxymethylchitosan succinamide; aloe vera extract; and scutellaria baicalensis extract. Extracts such as ginseng root extract, ginseng extract, persimmon tannin extract, rosehip 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, royal jelly extract, turmeric extract, ginseng extract, bladderwrack extract, beech bud extract, rice bran extract, camellia extract, peach kernel extract, sophora Extract, chlorella extract, marjoram extract, jasmine 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, Job's tears extract, Luffa extract, Lily extract, Saffron extract, Cnidium extract, Ginger extract, Hypericum perforatum extract, Rosemary extract Natural product extracts such as lee extract, garlic extract, chili pepper extract, and burnet extract, natural product 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 hydroxyalkylated cellulose, anti-dandruff agents such as zinc pyrithione, trichlorocarbanilide, sulfur, isopropylmethylphenol, and benzalkonium chloride, emulsifiers, opacifiers,Examples of such agents include sequestering agents, ultraviolet absorbers, antioxidants, preservatives, powdered ingredients, blood circulation promoters, local stimulants, hair follicle activators, hair nutrients, antiandrogenic agents, antiseborrheic agents, anti-aging agents, emollients, keratolytic agents, disinfectants, preservatives such as phenoxyethanol and parabens, anti-inflammatory agents, anti-inflammatory agents, cooling agents, hair growth agents such as amino acids, vitamins and herbal extracts, pH adjusters, pigments, dyes, coloring materials, fragrances, etc.

[0026] The solid conditioner composition of the present invention is less likely to crack when cut, and therefore can be cut and molded, which is suitable for mass production. For example, the components are melted or dissolved to homogenize them, then poured into a sealed rectangular tube or container, cooled or allowed to cool until solidified, and then cut and molded using various methods such as piano wire or a blade. Cutting and molding are described in more detail below. (Yamazoe Choshiro and Yoshizaki Yoshiro, "Soap Manufacturing Methods with Small Capital: Experimental Demand", 1932) In addition to cutting and molding, it can also be molded using commonly used methods such as pouring molten liquid into individual molds, solidifying it, and then molding it.

[0027] Next, a preferred method of using the solid conditioner of the present invention will be described. After washing the hair, the solid conditioner of the present invention is applied by directly contacting the hair and then thoroughly blending it into the hair. Alternatively, a small amount of the solid conditioner can be dissolved and then thoroughly blended into the hair. By thoroughly rinsing after blending, the most desirable feeling of use, such as improved hair smoothness from rinsing to drying, can be felt. On the other hand, if rinsing is not performed or is insufficient, stickiness or powdering may occur after drying. [Example]

[0028] 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.

[0029] The solid conditioner compositions shown in Tables 1 to 4 were prepared according to the following manufacturing procedures. (Manufacturing Procedure) All ingredients shown in Tables 1 to 4 are heated to approximately 90°C and mixed uniformly. Pour the mixture into a cylindrical tube 5 cm in diameter and 50 cm in height, with a lid on the bottom, and leave to cool. After the mixture was cooled to room temperature and solidified, it was extruded from the cylinder and subjected to the following evaluations. All of the solid conditioner compositions shown in Tables 1 to 4 were solid at room temperature.

[0030] (Workability evaluation) (Evaluation of cutting formability) The solid conditioner was taken out of the tube and cut five times at 3 cm intervals with a knife, and the cuts were evaluated on a 4-point scale. ×: Cracks or defects due to cutting are observed. △: Slight cracks or defects due to cutting are observed. ○: Almost no cracks or defects due to cutting are observed. ⊚: No cracks or defects due to cutting were observed.

[0031] (Stability evaluation) (Storage stability at high temperatures) The solid conditioner was cut into pieces at 3 cm intervals and stored at a temperature of 40°C and a humidity of 25%, and after one week the appearance was visually evaluated on a 4-point scale. ×: Significant changes were observed on the surface (e.g., severe disintegration, components appearing on the surface) △: Changes that cause quality problems were observed on the surface (e.g., melting, crumbling, etc.). ○: Slight changes were observed on the surface, but this did not affect use. ◎: No change was observed on the surface. (Storage stability under high humidity conditions) The storage stability under high humidity conditions was confirmed, assuming storage conditions in a bathroom. Storage conditions: The surface condition was checked after leaving the sample at room temperature of 25°C and humidity of 80% for 24 hours. ×: Significant changes were observed on the surface (e.g., severe disintegration, components appearing on the surface) △: Changes that cause quality problems were observed on the surface (e.g., melting, crumbling, etc.). ○: Slight changes were observed on the surface, but this did not affect use. ◎: No change was observed on the surface.

[0032] (Usability evaluation) Six expert panelists used the solid conditioners of the Examples and Comparative Examples for five days and assigned scores based on the following evaluation criteria, with a total score of 25 points or more being rated as ◎, 20 to 24 points being 〇, 15 to 19 points being △, and less than 15 points being ×. (Applicability) 1 point: Difficult to apply 2 points: Somewhat difficult to apply 3 points: Can be applied but spreads poorly 4 points: Easy to apply and spread 5 points: Easy to apply and spreads well (Hair combability during rinsing) 1 point: Worse than before use 2 points: Slightly worse than before use 3 points: Same as before use 4 points: Slightly smoother than before use 5 points: Smoother than before use (Hair combability after drying) 1 point: Worse than before use 2 points: Slightly worse than before use 3 points: Same as before use 4 points: Slightly smoother than before use 5 points: Smoother than before use

[0033] Examples 1 to 8 [Table 1]

[0034] Examples 9 to 16 [Table 2]

[0035] Comparative Examples 1 to 7 [Table 3]

[0036] Comparative Examples 8 to 14 [Table 4]

[0037] ※1: Lipocard (registered trademark) 22-80 (manufactured by Lion Specialty Chemicals), ※2: BTMS 225KC (manufactured by KCI, composition: behentrimonium methosulfate 25% by weight, stearyl alcohol 25% by weight, cetanol 50% by weight), ※3: Kalcol (registered trademark) 6098 (manufactured by Kao Corporation), ※4: Kalcol 8098 (manufactured by Kao Corporation), ※5: NIKKOL (registered trademark) MGS-BV2 (manufactured by Nikko Chemicals Co., Ltd.), ※6: NIKKOL MGO (manufactured by Nikko Chemicals Co., Ltd.), ※7 EMALEX (registered trademark) GM-5 (manufactured by Nippon Emulsion Co., Ltd.), ※8 EMALEX GM-15 (manufactured by Nippon Emulsion Co., Ltd.), ※9 EMALEX GM-20 (manufactured by Nippon Emulsion Co., Ltd.), ※10: NIKKOL DGMS (Nikko Chemicals Co., Ltd.), *11: NIKKOL TETRAGLYN 1-SV (Nikko Chemicals Co., Ltd.), *12: NIKKOL TETRAGLYN 1-OV (Nikko Chemicals Co., Ltd.), *13: NIKKOL HEXAGLYN 1-SV (Nikko Chemicals Co., Ltd.), *14: NIKKOL DECAGLYN 1-SV (Nikko Chemicals Co., Ltd.), *15: NIKKOL HEXAGLYN 3-SV (Nikko Chemicals Co., Ltd.), *16: EMALEX 603 (Nippon Emulsion Co., Ltd.), *17: EMALEX 400di-S (Nippon Emulsion Co., Ltd.), *18: EMALEX SPE-100S (Nippon Emulsion Co., Ltd.), *19: NIKKOL TRIFAT C-24 (Nikko Chemicals), *20: Lipex (registered trademark) Sheasoft (AAK Sweden AB)

[0038] Evaluation results Examples 1 to 16, which were prepared within the scope of the solid conditioner composition of the present invention, were all evaluated as good or better, confirming that they had excellent cutting and moldability suitable for mass production, storage stability under high temperature or high humidity conditions required for a solid conditioner, ease of application, and a feel when used from the time of rinsing to after drying. On the other hand, Comparative Example 1, in which the amount of component (A) was below the range, exhibited poor application and poor hair combability from rinsing to drying. Comparative Example 2, in which the amount of component (A) exceeded the range, exhibited cracks and defects when cut and shaped, and also had poor storage stability under high humidity. Comparative Example 3, in which the amount of component (B) was below the range, exhibited poor storage stability under high temperatures, and also had poor hair combability from rinsing to drying. Comparative Example 4, in which the amount of component (B) exceeded the range, exhibited cracks and defects when cut and shaped. Comparative Example 5, in which the amount of component (C) was below the range, exhibited cracks and defects when cut and shaped. Comparative Example 6, in which the amount of component (C) exceeded the range, exhibited poor application and poor hair combability from rinsing to drying. Comparative Example 7, in which the amount of component (D) was below the range, exhibited cracks and defects when cut and shaped, and also had poor storage stability under high temperatures. Comparative Example 8, in which the amount of component (D) exceeded the range, exhibited poor application and poor hair combability from rinsing to drying. Comparative Example 9, in which the HLB was below the range, had poor application properties and poor finger-combability when rinsing. Comparative Example 10, in which the HLB was above the range, had poor storage stability under high humidity. Comparative Examples 11 to 13, in which the (D) component was not used, suffered from cracks and chipping during cutting and molding, and also had poor storage stability under high temperatures. Comparative Example 14, in which the (C) component was not used, suffered from cracks and chipping during cutting and molding. [Industrial Applicability]

[0039] The solid conditioner composition of the present invention can be cut and molded to be suitable for mass production, dissolves and disintegrates appropriately to allow for an optimum amount to be used, makes it easy to apply an appropriate amount, spreads well, makes hair smooth to the touch from rinsing to drying, has excellent storage stability under high temperature and high humidity conditions, and has performance equivalent to that of a liquid conditioner. Therefore, in addition to solid conditioners, the solid conditioner composition can contribute to the mass production of solid rinses, solid treatments, solid detergents, and the like, as well as to improved work efficiency and cost reduction.

Claims

1. A solid conditioner composition comprising (A) 5 to 25 wt% of at least one quaternary ammonium salt type cationic surfactant, (B) 10 to 35 wt% of at least one selected from higher alcohols having an alkyl chain length of 14 to 22 carbon atoms, (C) 10 to 40 wt% of at least one or more selected from glycerin fatty acid esters, and (D) 10 to 30 wt% of at least one or more selected from polyoxyethylene glycerin fatty acid esters and polyglycerin fatty acid esters that are paste-like to solid at room temperature (25°C), wherein the average HLB of components (C) and (D) is 3 to 8.

2. The solid conditioner composition of (1), wherein component (A) is a behentrimonium salt-type cationic surfactant.

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.

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