Powder granulated product, and cosmetic and cleansing agent

Abstract

To provide a powder granule which is excellent in granulating properties, stability in a vessel during production, and storage stability, and can be blended with a usability improver at a high concentration in a cosmetic or a detergent, and to provide a cosmetic and a detergent which are improved in usability by blending the powder granule.SOLUTION: The powder granule comprises (A) a powder component, (B) a usability improver and (C) a binder, wherein the powder component (A) is at least one of (a- 1) an amino acid derivative and (a- 2) a wax having a melting point of ≥ 100 °C. The powder component (A) is (A-2) a wax having a melting point of 100 °C or higher, and is preferably a powder granulated product further containing (D) an inorganic powder.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a powder granulated product, and to a cosmetic and a cleanser containing the powder granulated product. [Background technology]

[0002] By incorporating the powder granules into cosmetics or cleansers, it is possible to impart a distinctive appearance and scrubbing effect, and to incorporate various foam quality improvers or drugs that are difficult to incorporate directly into cosmetics or cleansers via the powder granules. However, when powdered granules are blended into cosmetics or cleansing agents, the specific gravities of the cosmetics or cleansing agents differ from those of the powdered granules, causing the powdered granules to float or sink in the cosmetics or cleansing agents during preparation, making it difficult to blend the powdered granules stably.

[0003] Therefore, as a result of extensive research, the applicant of the present application has previously proposed a powder granulation product containing (A) 25 to 75 mass% of silicone powder having a specific gravity of 0.8 to 1.0, (B) 20 to 70 mass% of cellulose powder, and (C) 1 to 5 mass% of ethyl cellulose (see Patent Document 1). This proposed powder granulation product has the excellent characteristics of being less irritating to the skin and being easy to adjust so that the specific gravity of the powder granulation product is equivalent to that of the liquid component of a cleanser, or a liquid, emulsion, gel, or cream preparation, or the soap liquid before cooling and solidifying of soap produced by a framing method. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6074492 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the silicone powder contained in the powder granules described in Patent Document 1 is not biodegradable and remains in the environment, which may limit its use. Furthermore, Patent Document 1 does not mention the inclusion of a usability improver such as highly polymerized polyethylene glycol to improve the usability of hair treatment liquids and the like.

[0006] By incorporating a usability improver such as highly polymerized polyethylene glycol into a hair treatment liquid, it is possible to improve usability such as ease of running your fingers through the hair and manageability of the hair. However, incorporating a highly polymerized polyethylene glycol or other usability improver in a high concentration into a hair treatment liquid can cause thickening and stringiness, making it impossible to incorporate the usability improver in a high concentration, which results in a problem in that a sufficient effect of improving usability cannot be achieved.

[0007] The present invention aims to solve the above-mentioned problems of the prior art and to achieve the following objectives: Namely, the present invention aims to provide a powder granulated product that is excellent in granulation properties, in-vessel stability during production, and storage stability, and that allows a usability improver to be blended into a cosmetic or cleanser at a high concentration, and to provide a cosmetic or cleanser having improved usability due to the incorporation of the powder granulated product. [Means for solving the problem]

[0008] In order to solve the above problems, the present inventors have conducted extensive research and have found that a powder granulation product containing (A) a powder component, (B) a usability improver, (C) a binder, and preferably (D) an inorganic powder has excellent granulation properties, in-vessel stability during production, and storage stability, and that the usability improver can be blended in high concentrations with cosmetics or cleansers, thereby achieving significant improvements in usability, which has led to the completion of the present invention.

[0009] The powder granulated product of the present invention, which is a means for solving the above-mentioned problems, comprises (A) a powder component, (B) a usability improver, and (C) a binder, and the (A) powder component is at least one of (A-1) an amino acid derivative and (A-2) a wax having a melting point of 100°C or higher.

[0010] In the powder granulated product of the present invention, the amino acid derivative (A-1) is preferably lauroyl lysine or caproyl lysine. In the powder granulated product of the present invention, (A-2) the wax having a melting point of 100° C. or higher is preferably a synthetic wax. In the powder granulated product of the present invention, (B) the usability improver is preferably at least one selected from highly polymerized polyethylene glycol, cationized guar gum, and cationized cellulose. In the powder granulated product of the present invention, (B) the usability improver is preferably a highly polymerized polyethylene glycol having an average degree of polymerization of 5,000 or more. In the powder granulated product of the present invention, the binder (C) is preferably ethyl cellulose. In the powder granulated product of the present invention, the (A) powder component is (A-1) an amino acid derivative, and preferably contains 70 to 90 mass % of the (A-1) amino acid derivative, 5 to 25 mass % of the (B) usability improver, and 1 to 10 mass % of the (C) binder. In the powder granule of the present invention, the (A) powder component is (A-1) an amino acid derivative and (A-2) a wax having a melting point of 100°C or higher, and preferably contains 60 to 80% by mass of the (A-1) amino acid derivative, 1 to 10% by mass of the (A-2) wax having a melting point of 100°C or higher, 5 to 25% by mass of the (B) usability improver, and 1 to 10% by mass of the (C) binder. In the powder granule of the present invention, (A) the powder component is (A-2) a wax having a melting point of 100°C or higher, and further contains (D) an inorganic powder, and preferably contains 65 to 85 mass% of (A-2) the wax having a melting point of 100°C or higher, 5 to 25 mass% of (B) a usability improver, 1 to 10 mass% of (C) a binder, and 5 to 20 mass% of (D) the inorganic powder. In the powder granulated product of the present invention, the inorganic powder (D) is preferably talc.

[0011] The cosmetic of the present invention contains the powder granulated product of the present invention. In the cosmetic of the present invention, the blending amount of the powder granulated material is preferably 0.1 to 10% by mass relative to the total amount of the cosmetic.

[0012] The cleansing agent of the present invention contains the powder granulated product of the present invention. In the cleanser of the present invention, the blending amount of the powder granules is preferably 0.1 to 10% by mass based on the total amount of the cleanser. [Effects of the Invention]

[0013] According to the present invention, it is possible to solve the above-mentioned problems of the prior art, achieve the above-mentioned object, and provide a powder granulated product that is excellent in granulation properties, in-kettle stability during production, and storage stability, and that can be blended with a usability improver at a high concentration in a cosmetic or cleanser, as well as a cosmetic and cleanser having improved usability due to the blending of this powder granulated product. DETAILED DESCRIPTION OF THE INVENTION

[0014] (Powder granules) The powder granulated product of the present invention contains (A) a powder component, (B) a usability improver, (C) a binder, and preferably contains (D) an inorganic powder, and further contains other components as necessary.

[0015] In the present invention, the use of a powder granulated product containing a usability improver provides the following particularly significant effects. (1) When a cosmetic or cleanser containing the powder granules is stored, the usability improver can be stably maintained in the powder granules for a long period of time. On the other hand, when the cosmetic or cleanser is used (when washing hair), the powder granules disintegrate, allowing the usability improver to act, thereby improving usability such as ease of running fingers through hair, combing, and manageability of hair. (2) The powder granules containing the usability improver are stable and do not disintegrate during the production of cosmetics or cleansing agents, so thickening or stringiness does not occur in the production vessel, improving productivity. (3) By blending a powdered granule containing a high concentration of a usability improver into a cosmetic or cleanser, thickening or stringiness does not occur, as occurs when a high concentration of a usability improver is blended directly into the cosmetic or cleanser. This allows the usability improver to be blended into the cosmetic or cleanser at a high concentration, thereby improving usability.

[0016] <(A) Powder component> As the powder component (A), at least one of (A-1) an amino acid derivative and (A-2) a wax having a melting point of 100° C. or higher is used.

[0017] When (A-1) an amino acid derivative is used as the (A) powder component, (A-1) the amino acid derivative may be used alone, or (A-1) the amino acid derivative may be used in combination with (A-2) a wax having a melting point of 100°C or higher. When (A-2) a wax having a melting point of 100°C or higher is used as the (A) powder component, (A-2) a wax having a melting point of 100°C or higher may be used alone, or (A-1) an amino acid derivative and (A-2) a wax having a melting point of 100°C or higher may be used in combination. When (A-2) a wax having a melting point of 100° C. or higher is used alone as (A) the powder component, it is preferable to further contain (D) an inorganic powder.

[0018] -(A-1) Amino acid derivative- The (A-1) amino acid derivative is a compound obtained by dehydration condensation of a higher fatty acid and an amino acid, and examples thereof include lauroyl lysine, caproyl lysine, etc. Among these, lauroyl lysine is particularly preferred from the viewpoint of granulation properties. Lauroyl lysine is an amide of lauric acid and lysine, represented by the following structural formula:

[0019] [ka]

[0020] Lauroyl lysine is a layered powder having a structure in which thin hexagonal plate-shaped crystals are layered, and the average particle size of lauroyl lysine is preferably 30 μm or less, more preferably 20 to 30 μm. Commercially available lauroyl lysine products include, for example, Amihope (registered trademark) LL (manufactured by Ajinomoto Co., Inc.).

[0021] -(A-2) Wax with a melting point of 100°C or higher as a powder component- (A-2) The wax having a melting point of 100° C. or higher is not particularly limited as long as it has a melting point of 100° C. or higher, but synthetic wax is preferred. Examples of synthetic waxes include hydrocarbon waxes (eg, paraffin wax, microcrystalline wax, etc.). The average particle size of the synthetic wax is preferably 1 to 30 μm, more preferably 10 to 30 μm.

[0022] <(B) Usability improver> When the (B) usability improver is incorporated into hair care products such as hair treatments, it can improve usability such as ease of running fingers through hair, combing, and manageability of hair. Furthermore, when it is incorporated into soap compositions, it can improve usability such as foam quality (foam persistence, foam elasticity). Examples of (B) usability improvers include polyethylene glycol, cationized guar gum, and cationized cellulose. These may be used alone or in combination of two or more. Among these, highly polymerized polyethylene glycol is particularly preferred because of its high usability-improving effect.

[0023] Cationized guar gum is a cationic polymer obtained by adding cationic groups to guar gum. Examples of cationized guar gum include guar hydroxypropyltrimonium chloride and hydroxypropyl guar hydroxypropyltrimonium chloride.

[0024] Examples of cationized cellulose include polyquaternium-4 (hydroxyethylcellulose dimethyldiallylammonium chloride), polyquaternium-10 (O-[2-hydroxy-3-(trimethylammonio)propyl]hydroxyethylcellulose chloride), and hydroxyethylcellulose dimethyldiallylammonium chloride copolymer.

[0025] The average degree of polymerization of the polyethylene oxide constituting the highly polymerized polyethylene glycol is preferably at least 5,000, more preferably at least 10,000, and even more preferably at least 30,000. The average degree of polymerization of the polyethylene oxide is preferably at most 200,000, and more preferably at most 100,000. The weight average molecular weight of the highly polymerized polyethylene glycol is, for example, preferably 80,000 or more and 7,000,000 or less, and more preferably 100,000 or more and 5,000,000 or less.

[0026] Examples of highly polymerized polyethylene glycols include PEG-45M (average degree of polymerization 45,000, weight-average molecular weight approximately 2,000,000), PEG-65M (average degree of polymerization 65,000, weight-average molecular weight approximately 2,900,000), PEG-90M (average degree of polymerization 90,000, weight-average molecular weight approximately 4,000,000), PEG-115M (average degree of polymerization 115,000, weight-average molecular weight approximately 5,000,000), and PEG-160M ​​(average degree of polymerization 160,000, weight-average molecular weight approximately 7,000,000). These may be used alone or in combination of two or more.

[0027] The content of (B) usability improver is preferably 5 to 25% by mass, more preferably 5 to 20% by mass, and even more preferably 10 to 20% by mass, based on the total amount of powder granules. If the content of the usability improver is less than 5% by mass, the usability improving effect may not be obtained even when the powder granules are blended into cosmetics or cleansers. On the other hand, if the content of the usability improver exceeds 25% by mass, the usability improving effect may not be obtained, and stability in the kettle during production and appearance during blending may be reduced.

[0028] <(C) Binder> Examples of (C) binders include ethyl cellulose, vinyl acetate resin, gum arabic, xanthan gum, and carrageenan. These may be used alone or in combination of two or more. Among these, ethyl cellulose is particularly preferred because of its good color and odor and excellent granulation properties.

[0029] The content of the binder is preferably 1 to 10% by mass, more preferably 1 to 5% by mass, based on the total amount of the powder granules. If the content of the binder is less than 1% by mass, the binding effect will be weak, and the storage stability of the powder granules may be impaired (they may become more prone to crumbling). On the other hand, if the content of the binder is more than 10% by mass, the binding effect will be too strong, and the granulation properties may be reduced.

[0030] <(D) Inorganic powder> Examples of (D) inorganic powders include talc, sericite, mica, titanium mica, titanium oxide, kaolin, and silicates. These may be used alone or in combination of two or more. Among these, talc is preferred because it provides a good feel when the powder granules are held in the hand.

[0031] The average particle size of the inorganic powder is preferably 1 to 30 μm, more preferably 1 to 10 μm. The content of the inorganic powder is preferably 5 to 20% by mass, more preferably 10 to 20% by mass, based on the total amount of the powder granules. If the content of the inorganic powder is less than 5% by mass, the specific gravity of the powder granules will be small, and the powder granules may float when blended into a cosmetic or cleanser. On the other hand, if the content of the inorganic powder exceeds 20% by mass, the powder granules may dissolve or aggregate, or significantly float or settle in the cosmetic or cleanser when blended into the cosmetic or cleanser.

[0032] When (A-1) an amino acid derivative is used alone as the (A) powder component, it is preferable that the powder contains 70 to 90 mass % of (A-1) an amino acid derivative, 5 to 25 mass % of (B) a usability improver, and 1 to 10 mass % of (C) a binder. If the content of (A-1) amino acid derivative is less than 70% by mass, when the powder granules are blended into a cosmetic or cleanser, they may dissolve or aggregate, or float or settle slightly in the cosmetic or cleanser. On the other hand, if the content of (A-1) amino acid derivative is more than 90% by mass and the content of (B) usability improver is less than 5% by mass, the usability improvement effect may not be obtained even when the powder granules are blended into a cosmetic or cleanser. Furthermore, if the content of (A-1) amino acid derivative is more than 90% by mass and the content of (C) binder is less than 1% by mass, the caking effect is weakened, and the stability of the powder granules may be impaired (they may become more prone to disintegration).

[0033] When (A-1) an amino acid derivative and (A-2) a wax having a melting point of 100°C or higher are used in combination as the (A) powder component, the powder preferably contains 60 to 80% by mass of (A-1) the amino acid derivative, 1 to 10% by mass of (A-2) the wax having a melting point of 100°C or higher, 5 to 25% by mass of (B) a usability improver, and 1 to 10% by mass of (C) a binder. If the content of (A-1) amino acid derivative is less than 60% by mass, when the powder granules are blended into a cosmetic or cleanser, they may dissolve or aggregate, or float or settle slightly in the cosmetic or cleanser. On the other hand, if the content of (A-1) amino acid derivative is more than 80% by mass and the content of (B) usability improver is less than 5% by mass, the usability improvement effect may not be obtained even when the powder granules are blended into a cosmetic or cleanser. Furthermore, if the content of (A-1) amino acid derivative is more than 80% by mass and the content of (C) binder is less than 1% by mass, the caking effect is weakened, and the stability of the powder granules may be impaired (they may become more prone to disintegration). Furthermore, if the content of (A-2) wax having a melting point of 100°C or higher exceeds 10% by mass, when the powder granules are blended into a cosmetic or cleanser, the powder granules may dissolve or aggregate, or float or settle slightly in the cosmetic or cleanser.

[0034] When (A-2) wax having a melting point of 100°C or higher is used alone as (A) powder component, it is preferable that (D) inorganic powder is further contained, and that the composition contains 65 to 85 mass% of (A-2) wax having a melting point of 100°C or higher, 5 to 25 mass% of (B) usability improver, 1 to 10 mass% of (C) binder, and 5 to 20 mass% of (D) inorganic powder. If the content of (A-2) wax with a melting point of 100°C or higher is less than 65% by mass, when the powder granules are blended into a cosmetic or cleanser, the powder granules may dissolve or aggregate, or significantly float or settle in the cosmetic or cleanser. On the other hand, if the content of (A-2) wax with a melting point of 100°C or higher is more than 85% by mass and the content of (B) usability improver is less than 5% by mass, the usability improvement effect may not be obtained even when the powder granules are blended into a cosmetic or cleanser. Furthermore, if the content of (A-2) wax with a melting point of 100°C or higher is more than 85% by mass and the content of (C) binder is less than 1% by mass, the caking effect is weakened, and the stability of the powder granules may be impaired (they may become more prone to crumbling). Furthermore, if the content of (A-2) wax having a melting point of 100°C or higher exceeds 85% by mass and the content of (D) inorganic powder is less than 5% by mass, the specific gravity of the powder granules will be small, and the powder granules may float when blended into cosmetics or cleansers.

[0035] <Other ingredients> The powder granulated product of the present invention may contain other components as required, provided that the purpose and effects of the present invention are not impaired. Examples of other components include colorants, synthetic chemicals, oils, antioxidants, light stabilizers, ultraviolet absorbers, heat stabilizers, tackifiers, and processing aids.

[0036] The particle size of the powder granulated product of the present invention is not particularly limited, but the average particle size is preferably 100 to 1,000 μm, more preferably 200 to 500 μm. The soap composition containing the powder granules of the present invention is generally prepared at a temperature of 70 to 90° C. Therefore, the melting point of the powder granules is preferably 90° C. or higher.

[0037] <Method of manufacturing powder granules> The granulation method for the powder granules of the present invention is not particularly limited, and examples thereof include stirring and mixing granulation, rolling granulation, extrusion granulation, crushing granulation, fluidized bed granulation, spray drying granulation, melt granulation, compression granulation, vacuum freeze granulation, suspension agglomeration granulation, coating granulation, etc. Among these, extrusion granulation is preferred.

[0038] The powder granules of the present invention are prepared by placing the above components (A) to (C) or the above components (A) to (D) into a stirring device, adding the solvent in three separate portions, and stirring each time to obtain a mixture. The resulting mixture is extruded through a sieve with specified openings to granulate, thereby obtaining a granule. The solvent is evaporated from the resulting granules, and the mixture is dried. The powder granules can then be extruded through a sieve with specified openings to granulate, thereby producing a powder granule. The particle size of the powder granules may be further adjusted by classification or pulverization, as necessary. Examples of the solvent include ethanol, methanol, acetone, hexane, etc. Among these, ethanol is preferred from the viewpoint of safety.

[0039] (Cosmetics) The cosmetic of the present invention contains the powder granulated product of the present invention in an amount of preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass, even more preferably 0.5 to 3% by mass, and particularly preferably 1 to 3% by mass, based on the total amount of the cosmetic.

[0040] The base of the cosmetic to be blended with the powder granules can be appropriately selected from ingredients commonly used in cosmetics, and examples include water, alcohol, oily raw materials, surfactants, moisturizers, whitening agents, thickeners, pH adjusters, UV absorbers, antioxidants, preservatives, sequestering agents (chelating agents), coloring materials, fragrances, excipients, blood circulation promoters, skin medications, scalp medications, other medicinal agents, vitamins, hormones, amino acids, and antihistamines. The cosmetic formulation may be in the form of a cream, paste, gel, liquid, or powder. Specific examples of cosmetic products include lotions, emulsions, serums, creams, gels, cleansing foams, cleansing powders, cleansing creams, massage creams, massage gels, hair treatments, hair packs, conditioners, lotions, and sheet packs.

[0041] (cleaning agent) The cleanser of the present invention contains the powdered granules of the present invention in an amount of preferably 0.1 to 10% by mass, more preferably 0.5 to 5% by mass, even more preferably 0.5 to 3% by mass, and particularly preferably 1 to 3% by mass, based on the total amount of the cleanser.

[0042] The base of the cleanser into which the powder granules are to be blended can be appropriately selected from ingredients commonly used in cleansers, and examples thereof include higher fatty acid salts, acyl glutamates, cetyl sulfates, polyoxyalkylene alkylamines, cationic polymers, thickeners, chelating agents, pH adjusters, fragrances, colorants, moisturizers, preservatives, anti-inflammatory agents, plant extracts, disinfectants, antioxidants, ultraviolet absorbers, chelating agents, higher fatty acids, and sequestering agents. The detergent may be in the form of, for example, a solid, liquid, emulsion, cream, paste, or gel. Specific examples of cleansing products include framed soap, transparent soap, solid shampoo, rinse-in shampoo, body soap, and hand soap. [Example]

[0043] Examples of the present invention will be described below, but the present invention is not limited to these examples. The evaluation methods used in the present invention are as follows.

[0044] <Granulation property> The texture of the obtained powder granulated product when squeezed with the hand and whether or not it could be granulated were evaluated based on the following criteria. [Evaluation criteria] 〇: Has adequate moisture, can maintain its shape for a while when lightly squeezed with the hand, is not sticky, and is granulated uniformly △: Slightly sticky when lightly squeezed with hands, but granulation is possible ×: Granulation was not possible

[0045] <Stability in the pot during manufacturing> The soap composition shown in Table 1 below or the hair treatment liquid shown in Table 2 below was added to a production kettle (70°C) and stirred for 15 minutes, after which the stability inside the kettle during production was evaluated based on the following criteria. [Evaluation criteria] 〇: After stirring for 15 minutes, the powder granules did not dissolve or disintegrate. △: After stirring for 15 minutes, the powder granules were partially dissolved or disintegrated. ×: After stirring for 15 minutes, the powder granules were completely dissolved or disintegrated.

[0046] -Soap composition-

[0047] [Table 1]

[0048] -Hair treatment liquid-

[0049] [Table 2]

[0050] <Appearance when blended> The soap compositions shown in Table 1 above, which contained the powder granules, or the hair treatment liquids shown in Table 2 above, were evaluated for appearance based on the following criteria. [Evaluation criteria] ◯: The powder granules are uniformly dispersed throughout the soap composition or hair treatment liquid, and there is no floating or settling. △: The powder granules dissolved or aggregated in the soap composition or hair treatment liquid, and slightly floated or settled. ×: The powder granules dissolved or aggregated in the soap composition or hair treatment liquid, and significantly floated or settled.

[0051] <Evaluation of hair runnability and manageability> The hair treatment liquid shown in Table 2 above containing the powder granules was applied to a hair strand, rinsed off, and then the ease of running fingers through the hair and the manageability of the hair were evaluated based on the following criteria in comparison with the hair treatment liquid in Table 2 not containing the powder granules.

[0052] [Evaluation criteria for hair smoothness] ◯: Compared to a hair treatment liquid that does not contain the powdered granules, the hair is easy to run your fingers through and comb. △: The effect is the same as that of a hair treatment liquid that does not contain powdered granules. ×: Hair is difficult to comb and run through with fingers compared to a hair treatment liquid containing no powdered granules.

[0053] [Evaluation criteria for hair manageability] 〇: Compared to hair treatment liquids that do not contain powdered granules, hair is more manageable after drying. △: The effect is the same as that of a hair treatment liquid that does not contain powdered granules. ×: Compared to a hair treatment liquid that does not contain powdered granules, hair becomes unmanageable and spreads after drying.

[0054] <Evaluation of foam quality> The soap compositions were evaluated by a panel of five experts for their foam quality (foam persistence and foam elasticity) during use according to the following criteria. [Evaluation criteria] 〇: Good foam quality △: Normal foam quality ×: Poor foam quality

[0055] (Test Examples 1-1 to 1-7) (B) Six types of usability improvers shown in Table 3 were used, and components (A) to (C) or components (A) and (C) shown in Table 4 were placed in a stirring device, and the solvent (ethanol) was added in three portions, stirring each time to obtain a mixture. The resulting mixture was granulated by being extruded through a 20 mesh (20M) sieve to obtain granules. The solvent was evaporated from the resulting granules, and the granules were dried. Thereafter, the mixture was extruded and granulated through a 60 mesh (60M) sieve to obtain a powder granulated product. A 20 mesh (20M) sieve is a sieve with openings of 0.701 mm (701 μm). A 60 mesh (60M) sieve is a sieve with openings of 0.246 mm (246 μm).

[0056] [Table 3]

[0057] Next, the granulation properties of the obtained powder granules were evaluated, and the results are shown in Table 4. The hair treatment liquid containing the obtained powder granules was evaluated for stability in the kettle during production, appearance during blending, ease of running fingers through hair, and hair manageability. The results are shown in Table 4.

[0058] [Table 4]

[0059] From the results in Table 4, Test Example 1-2, which used guar hydroxypropyltrimonium chloride as a usability improver, and Test Example 1-3, which used polyquaternium-10 as a usability improver, both showed good hair runnability. Test Example 1-6, which used highly polymerized polyethylene glycol (PEG-90M) as a usability improver, showed good hair runnability and manageability. These results indicate that guar hydroxypropyltrimonium chloride, polyquaternium-10, and highly polymerized polyethylene glycol (PEG-90M) are suitable usability improvers, with highly polymerized polyethylene glycol (PEG-90M) being particularly suitable.

[0060] (Test Examples 1-1, 1-6, and 2-1 to 2-6) Next, powder granules were prepared in the same manner as in Test Examples 1-1 to 1-7 using highly polymerized polyethylene glycol (PEG-90M) as a usability improver and the compositions shown in Table 5, and the granulation properties were evaluated. The results are shown in Table 5. The soap compositions shown in Table 1, which contained the obtained powder granules, were evaluated for stability in the kettle during production, appearance during blending, and foam quality. The results are shown in Table 5. The hair treatment liquids shown in Table 2, which contained the obtained powder granules, were evaluated for stability in the kettle during production, appearance during blending, ease of running fingers through hair, and manageability of hair. The results are shown in Table 5.

[0061] [Table 5]

[0062] The results in Table 5 show that the powder granulation product containing (A) 70 to 90 mass% of an amino acid derivative as a powder component, (B) 5 to 25 mass% of a usability improver, and (C) 1 to 10 mass% of a binder has good granulation properties, and the evaluation results of the soap composition and hair treatment liquid containing the powder granulation product were all good. Therefore, it was found that the content of highly polymerized polyethylene glycol (PEG-90M) as a usability improver is preferably 5 to 25 mass % relative to the total amount of powder granules.

[0063] (Test Examples 3-1 to 3-7) (B) Using the six types of usability improvers shown in Table 3 above, powder granules were prepared using the components (A) to (D) or components (A), (C) and (D) shown in Table 6 in the same manner as in Test Examples 1-1 to 1-7, and the granulation properties were evaluated. The hair treatment liquid containing the obtained powder granules was also evaluated for stability in the kettle during production, appearance during blending, ease of running fingers through hair, and manageability of hair. The results are shown in Table 6.

[0064] [Table 6]

[0065] From the results in Table 6, Test Example 3-2, which used guar hydroxypropyltrimonium chloride as a usability improver, and Test Example 3-3, which used polyquaternium-10 as a usability improver, both showed good hair runnability. Test Example 3-6, which used highly polymerized polyethylene glycol (PEG-90M) as a usability improver, showed good hair runnability and manageability. Therefore, it was found that guar hydroxypropyltrimonium chloride, polyquaternium-10, and highly polymerized polyethylene glycol (PEG-90M) are suitable usability improvers, with highly polymerized polyethylene glycol (PEG-90M) being particularly suitable.

[0066] (Test Examples 3-1, 3-6, and 4-1 to 4-6) Using highly polymerized polyethylene glycol as a usability improver, powder granules were prepared in the same manner as in Test Examples 1-1 to 1-7 according to the compositions shown in Table 7, and the granulation properties were evaluated. The results are shown in Table 7. The soap compositions containing the powder granules were evaluated for stability in the kettle during production, appearance during blending, and foam quality. The results are shown in Table 7. The hair treatment liquid containing the obtained powder granules was also evaluated for stability in the kettle during production, appearance during blending, ease of running fingers through hair, and manageability of hair. The results are shown in Table 7.

[0067] [Table 7]

[0068] The results in Table 7 show that the powder granulation product containing (A) 65 to 85 mass% of the powder component hydrocarbon wax, (B) 5 to 25 mass% of the usability improver, (C) 5 mass% of the binder, and (D) 5 mass% of the talc has good granulation properties, and the evaluation results of the soap composition and hair treatment liquid containing the powder granulation product were all good. Therefore, it was found that the content of highly polymerized polyethylene glycol (PEG-90M) as a usability improver is preferably 5 to 25 mass % relative to the total amount of powder granules.

[0069] (Test Examples 1-1, and 5-1 to 5-7) Using highly polymerized polyethylene glycol as a usability improver, powder granules were prepared in the same manner as in Test Examples 1-1 to 1-7 according to the compositions shown in Table 8, and the granulation properties were evaluated. The results are shown in Table 8. The soap compositions containing the powder granules were evaluated for stability in the kettle during production, appearance during blending, and foam quality. The results are shown in Table 8. The hair treatment liquid containing the obtained powder granules was also evaluated for stability in the kettle during production, appearance during blending, ease of running fingers through hair, and manageability of hair. The results are shown in Table 8.

[0070] [Table 8]

[0071] The results in Table 8 show that the powder granulation product containing 60 to 80 mass% of (A-1) amino acid derivative, 10 mass% of (A-2) hydrocarbon wax, 5 to 25 mass% of (B) usability improver, and 5 mass% of (C) ethyl cellulose has good granulation properties, and the evaluation results of the soap composition and hair treatment liquid containing the powder granulation product were all good. Therefore, it was found that the content of (B) highly polymerized polyethylene glycol (PEG-90M) as a usability improver is preferably 5 to 25% by mass relative to the total amount of powder granules.

[0072] (Prescription Examples 1-5) Table 9 below shows hair treatment liquids of Formulation Examples 1 to 4, which contain the powder granules of Test Examples 2 to 4. Formulation Example 5 is a hair treatment liquid that contains highly polymerized polyethylene glycol (PEG-90M) instead of the powder granules. The viscosity of the resulting hair treatment liquid at the time of disintegration of the powder granules, as well as the viscosity before and after storage, were measured to evaluate storage stability. Furthermore, the hair treatment liquid after storage was evaluated for ease of running fingers through the hair and manageability in the same manner as above. The results are shown in Table 9.

[0073] <Storage stability> 95 ml of the obtained hair treatment liquid was placed in a 100 ml sealed container with a lid and stored in a thermostatic bath at 50°C for 30 days. The viscosity at 25°C before and after storage was measured using a viscometer, and the rate of change in viscosity was calculated using the following formula 1, and the storage stability was evaluated according to the following criteria. [Formula 1] Viscosity change rate (%) = [(viscosity after storage - viscosity before storage) / (viscosity before storage)] x 100% [Evaluation criteria] ○: Viscosity change rate is less than ±10% ×: Viscosity change rate is ±10% or more

[0074] <Viscosity of powder granules when they disintegrate> The hair treatment liquids of Formulation Examples 1 to 4 containing the powder granules were vigorously stirred at 75°C for 30 minutes or more, and after confirming that the granules had disintegrated (dissolved), the viscosity of the powder granules at the time of disintegration was measured.

[0075] -Hair treatment liquid-

[0076] [Table 9]

[0077] The results in Table 9 show that in Formulation Examples 1 to 4, the viscosity of the powder granules increases rapidly upon disintegration (dissolution) (a viscosity increase of approximately 4,000 to 10,000 mPa·s, depending on the blend amount). In contrast, the viscosity change rate over 30 days of storage stability at 50°C was less than ±10% (a maximum viscosity increase of 1,140 to 1,200 mPa·s), indicating that the powder granules of Formulation Examples 1 to 4 do not disintegrate (dissolve) in the hair treatment liquid and remain stable for long periods of time. This shows that the powdered granules containing a high concentration of highly polymerized polyethylene glycol can be stably maintained in the hair treatment liquid for a long period of time until the time of use (when washing hair), and that when the hair treatment liquid is used (when washing hair) after storage, the powdered granules containing highly polymerized polyethylene glycol disintegrate, and the released highly polymerized polyethylene glycol acts to improve usability (ease of running fingers through hair and manageability of hair). It was also found that the amount of powder granules to be blended is preferably 1.0% by mass or more.

[0078] (Prescription Examples 6-10) Table 10 below shows examples of soap compositions prepared by conventional methods. The resulting soap compositions were evaluated for foam quality, and the results are shown in Table 10.

[0079] -Soap composition-

[0080] [Table 10] The results in Table 10 show that by blending powder granules containing highly polymerizable polyethylene glycol into a soap composition, an effect of improving usability (improved foam quality) can be obtained. It was also found that the amount of powder granules to be blended is preferably 1.0% by mass or more. [Industrial Applicability]

[0081] The powder granulated product of the present invention has excellent granulation properties, in-vessel stability during production, and storage stability, and can be blended with a usability improver at a high concentration in cosmetics or cleansing agents. Therefore, the product is suitably used in, for example, cosmetics such as lotions, milky lotions, serums, creams, gels, cleansing foams, cleansing powders, cleansing creams, massage creams, massage gels, hair treatments, hair packs, conditioners, lotions, and sheet packs; and cleansing agents such as framed soaps, transparent soaps, solid shampoos, rinse-in shampoos, body soaps, and hand soaps.

Claims

1. (A) a powder component; (B) a usability improver; and (C) a binder; Including, The powder granules are characterized in that the powder component (A) is at least one of (A-1) an amino acid derivative and (A-2) a wax having a melting point of 100°C or higher.

2. The powder granulated product according to claim 1, wherein the amino acid derivative (A-1) is at least one of lauroyl lysine and caproyl lysine.

3. The powder granulated product according to claim 1, wherein the wax (A-2) having a melting point of 100°C or higher is a synthetic wax.

4. 2. The powder granulated product according to claim 1, wherein the usability improver (B) is at least one selected from highly polymerized polyethylene glycol, cationized guar gum, and cationized cellulose.

5. 5. The powder granulated product according to claim 4, wherein the (B) usability improver is a highly polymerized polyethylene glycol having an average degree of polymerization of 5,000 or more.

6. 2. The powder granulated product according to claim 1, wherein the binder (C) is ethyl cellulose.

7. the powder component (A) is the amino acid derivative (A-1), The powder granule according to claim 1, comprising 70 to 90% by mass of the (A-1) amino acid derivative, 5 to 25% by mass of the (B) usability improver, and 1 to 10% by mass of the (C) binder.

8. the (A) powder component is the (A-1) amino acid derivative and the (A-2) wax having a melting point of 100°C or higher, 2. The powder granulated product according to claim 1, comprising: 60 to 80% by mass of the (A-1) amino acid derivative; 1 to 10% by mass of the (A-2) wax having a melting point of 100°C or higher; 5 to 25% by mass of the (B) usability improver; and 1 to 10% by mass of the (C) binder.

9. The (A) powder component is the (A-2) wax having a melting point of 100°C or higher, and further contains (D) inorganic powder, The powder granule according to claim 1, comprising: 65 to 85% by mass of the (A-2) wax having a melting point of 100°C or higher; 5 to 25% by mass of the (B) usability improver; 1 to 10% by mass of the (C) binder; and 5 to 20% by mass of the (D) inorganic powder.

10. The powder granulated product according to claim 9, wherein the inorganic powder (D) is talc.

11. A cosmetic preparation comprising the powder granulated product according to any one of claims 1 to 10.

12. The cosmetic according to claim 11, wherein the blending amount of the powder granules is 0.1 to 10% by mass with respect to the total amount of the cosmetic.

13. A cleanser characterized by comprising the powder granulated product according to any one of claims 1 to 10.

14. The cleanser according to claim 13, wherein the blending amount of the powder granules is 0.1 to 10% by mass based on the total amount of the cleanser.

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