JP5690494B2 - Solid bath composition - Google Patents

Description

  The present invention relates to a solid bath agent composition.

Solid bath preparations such as tablets, granules, and powders containing inorganic salts such as carbonates, sulfates, and chlorides that are part of natural hot springs have good usability and distribution. It is widely used. Recently, in addition to the effects of inorganic salts, these solid bath agents may be blended with an oily component or a moisturizer for the purpose of improving the skin feel during or after bathing (Patent Document 1).
However, if such a solid bath preparation actually contains a large amount of an oily component or a humectant, a tableting failure occurs when the bath preparation is a tablet, and blocking occurs when the bath preparation is a granule or a powder. Because of these problems, there is a limit to the content of these components, and there is room for study regarding improvements in skin feel.

  On the other hand, as a bath agent composition containing a nonionic surfactant having 100 or more ethylene oxide, an oily component that is liquid at 25 ° C., a nonionic surfactant having 100 or more ethylene oxide, and other nonionic surfactants. An emulsified type, that is, a liquid bath agent composition containing a surfactant and glycyrrhetinic acid or glycyrrhizic acid has been reported (Patent Document 2).

JP-A-2-115116 JP 2009-126843 A

  Accordingly, an object of the present invention is to provide a solid bath preparation that has a good skin feel during bathing or after bathing, and is less likely to cause tableting troubles or blocking.

  Therefore, as a result of various studies to improve the skin feel of the solid bath preparation, the present inventor has included a specific amount of a nonionic surfactant having a specific ethylene oxide chain and inorganic salts. Despite the fact that a solid bath agent that has a very smooth and clinging new feel that is not found in solid bath agents can be obtained, a solid bath agent with good shape retention is obtained that is unlikely to cause tableting troubles or blocking. I found out that

That is, the present invention includes the following components (A) and (B),
(A) 0.1 to 18% by mass of a polyoxyethylene nonionic surfactant having an average ethylene oxide addition mole number per one ethylene oxide chain (EO addition mole number / EO chain number) of 30 to 300,
(B) 10 to 99% by mass of inorganic salts
A solid bath agent composition containing

  When the solid bath agent composition of the present invention is added to bath water, it is extremely smooth and clinging that cannot be achieved with conventional solid bath agents, and a good skin feel like wrapped in a veil is obtained during bathing. Played.

The solid bath agent composition of the present invention comprises a polyoxyethylene nonionic component (A) having an average ethylene oxide addition mole number per one ethylene oxide chain (EO addition mole number / EO chain number) of 30 to 300. Contains a surfactant. By blending such a polyoxyethylene nonionic surfactant having a specific structure, a smooth and clinging feel during bathing can be obtained. Examples of such nonionic surfactants include ester-based or ether-based polyoxyethylene-based nonionic surfactants such as tri-C ₈ -C ₂₄ fatty acid poxyethylene sorbitan (120 to 300 E.E. O.), polyoxyethylene C ₈ -C ₂₄ alkyl ether (30~100E.O.), polyoxyethylene C ₈ -C ₂₄ alkenyl ether (30~100E.O.), mono-C ₈ -C ₂₄ fatty acid polyethylene Examples include glycol (30 to 100 EO) and polyoxyethylene hydrogenated castor oil (90 to 300 EO).
Specifically, polyoxyethylene sorbitan triisostearate (160EO), polyoxyethylene oleyl ether (50EO), polyoxyethylene stearyl ether (40EO), polyoxyethylene lauryl ether (50E) O.), polyethylene glycol monostearate (40E.O.), polyoxyethylene hydrogenated castor oil (100E.O.), polyoxyethylene myristyl ether (85E.O.), and the like. These may be used alone or in combination of two or more.

Especially, 1-4 are preferable and, as for the number of ethylene oxide chains (= EO chain number) of a component (A), 2-4 are more preferable. That is, tri-C ₈ -C ₂₄ fatty acid polyoxyethylene sorbitan (120 to 300 EO ethylene oxide chain 3 or 4) having two or more ethylene oxide chains and polyoxyethylene hydrogenated castor oil (90 to 300 EO 3 ethylene oxide chains) are more preferred. In particular, polyoxyethylene hydrogenated castor oil (100 EO) having three ethylene oxide chains, particularly polyoxyethylene sorbitan triisostearate (160 EO) having three or four ethylene oxide chains. A new sensation that is smooth and cluttered during bathing is very favorable, which is preferable.

  Content of the component (A) in the solid bath agent composition of this invention is 0.1-18 mass%, Preferably it is 0.2-4 mass%, More preferably, it is 0.3-3 mass%, Particularly preferably, the content is 0.6 to 2% by mass, because it is difficult to cause tableting troubles and blocking, and a new feeling that is smooth and clinging is excellent. Further, when an oil component is blended, problems such as oil floating are suppressed, and this is particularly preferable because it is well emulsified and dispersed in bath water.

The solid bath agent composition of the present invention contains (B) an inorganic salt for the purpose of obtaining a bathing effect. Inorganic salts are compounds in which an anion derived from an inorganic acid and a cation derived from a base are ion-bonded. Examples thereof include sodium carbonate, sodium hydrogen carbonate, potassium carbonate, potassium hydrogen carbonate, sesqui sodium carbonate, potassium chloride, and chloride. Examples thereof include sodium, sodium sulfate, magnesium sulfate, potassium nitrate, sodium nitrate, sodium polyphosphate, ammonium chloride, iron sulfate, sodium phosphate, sodium thiosulfate and the like. Of these, carbonates, sulfates, and chlorides are more preferable, and sodium carbonate, sodium bicarbonate, sodium sesquicarbonate, potassium chloride, sodium chloride, sodium sulfate, magnesium sulfate, and the like are particularly preferable.
The content of the component (B) in the solid bath agent composition of the present invention is 10 to 99% by mass, but these inorganic salts are more preferably 20 to 98 in the bath agent composition of the present invention. It is preferable to contain 0.5 mass%, particularly 25-98 mass% because it exhibits a bathing effect, prevents tableting troubles and blocking, and has good solubility in bath water.

  When a carbonate is blended as an inorganic salt in the bath agent composition of the present invention, a bath agent that generates carbon dioxide can be obtained by further adding an acid thereto. As the acid used here, organic acids such as succinic acid, fumaric acid, malic acid, adipic acid, tartaric acid and citric acid are more preferable. The content of the acid in the bath agent composition is preferably 20 to 79% by mass, more preferably 25 to 70% by mass, and particularly preferably 30 to 60% by mass from the viewpoint of carbon dioxide generation effect. Moreover, 20-79 mass% is preferable, as for content in the bath agent composition of carbonate at the time of using carbonate and an organic acid together, Furthermore, 25-75 mass% is preferable, and it is 30-70 mass% especially. Is preferable in terms of carbon dioxide gas generation effect.

  These acids and carbonates can be used alone or in combination of two or more. The mixing ratio is not particularly limited, but if the mixing ratio of acid and carbonate is appropriately selected so that the pH of the bath water is 5 to 7, an effective amount of carbon dioxide gas in the bath water is dissolved. Therefore, an excellent bath preparation such as a blood circulation promoting effect can be obtained. Moreover, when mix | blending an acid and carbonate in the range which pH of bath water remove | deviates from 5-7, it can also utilize as an agent for foaming baths.

  Furthermore, the content ratio ((A) / (B)) of the component (A) and the component (B) is preferably 0.0011 to 1.8, more preferably 0.0014 to 1.5, and particularly 0. 0.002 to 0.6 is very preferable because it is difficult to cause tableting trouble and blocking, and a good skin feel is obtained.

  Furthermore, it is very preferable that the bath agent composition of the present invention contains (C) an oily component for the purpose of improving the skin feel effect of component (A). Thereby, the smooth feeling during bathing and after bathing is remarkably improved.

Specifically, the component (C) oil component is preferably one or more selected from fatty acid esters, waxes, hydrocarbons, higher fatty acids, higher alcohols, and silicone oils. Fatty acid esters include glycerin fatty acid esters and alcohol fatty acid esters. Among these, the glycerin fatty acid esters include triglycerin fatty acid esters, diglycerin fatty acid esters, monoglycerin fatty acid esters, etc., among which triglycerin fatty acid esters and diglycerin fatty acid esters are preferred, Soybean oil, nutka oil, jojoba oil, avocado oil, almond oil, olive oil, cacao butter, sesame oil, persic oil, castor oil, coconut oil Mink oil, beef tallow, pork tallow and the like are preferable. Hardened oils obtained by hydrogenating these natural fats and oils, myristic acid triglyceride, and 2-ethylhexanoic acid triglyceride can also be used. As the diglycerin fatty acid esters, di-C ₈ -C ₂₄ fatty acid glycerin esters, for example, one or two glycerin diesters of fatty acids such as 2-ethylhexanoic acid, myristic acid, oleic acid and isostearic acid are preferable. Examples of alcohol fatty acid esters include isopropyl myristate, myristyl myristate, isopropyl palmitate, isopropyl adipate, butyl stearate, decyl oleate and the like, higher fatty acid esters having 10 to 36 carbon atoms, myristyl lactate, cetyl lactate And higher alcohol esters. Examples of waxes include carnauba wax, whale wax, and beeswax. Examples of hydrocarbons include liquid paraffin, petrolatum, paraffin microcrystalline wax, ceresin, squalane, and bristan. Examples of the higher fatty acids include fatty acids having 8 to 24 carbon atoms such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, linolenic acid, lanolinic acid, and isostearic acid. Examples of the higher alcohols include aliphatic alcohols having 8 to 24 carbon atoms such as lauryl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, lanolin alcohol, and 2-hexyldecanol. Examples of the silicone oil include dimethylpolysiloxane, methylphenylpolysiloxane, various modified silicones, and the like. These may be used alone or in combination of two or more.
Among them, fats such as nutka oil, jojoba oil, olive oil, esters such as octyldodecyl myristate, isopropyl palmitate and isopropyl myristate, hydrocarbons such as liquid paraffin and petrolatum, etc. are being bathed with component (A). It is very preferable for improving the skin feel and moisturizing properties such as moist feeling after bathing.
The content of the component (C) in the bath preparation composition is to provide a smooth and clinging feeling during bathing by the component (A), or to feel moisturizing and moisturizing after bathing. 0.1 to 10% by weight, further 0.2 to 8% by weight, especially 0.3 to 5% by weight, especially 0.5 to 1% by weight, in order to increase the properties and the stability of the preparation Is preferred.

  Furthermore, the mass ratio of component (C) and component (A) to component (B) ((A) + (C)) / (B) is 0.0021 to 2.8, particularly 0.003 to 0.8. When it is 93, tableting troubles and blocking are less likely to occur, and a good skin feel is obtained, which is very preferable.

  Furthermore, in the bath agent composition of the present invention, the nonionic surfactant (D) different from the component (A) is contained for the purpose of favorably dispersing the oil component (C) in the bath water. preferable.

Specifically, the component (D) is a polyoxyethylene sorbitan fatty acid such as polyoxyethylene (6) sorbitan monooleate, polyoxyethylene (20) sorbitan trioleate, polyoxyethylene (20) sorbitan monooleate, or the like. Polyoxyethylene alkyl ethers such as esters, polyoxyethylene (9) oleyl ether, polyoxyethylene (6) stearyl ether; polyoxyethylene glycerin fatty acid esters such as polyoxyethylene (15) glyceryl monooleate; polytetraoleic acid poly Polyoxyethylene such as oxyethylene (30: EO chain number 6) sorbite, tetraoleic acid polyoxyethylene (40: EO chain number 6) sorbit, tetraoleic acid polyoxyethylene (60: EO chain number 6) sorbit Sorbitol fatty acid ester; sorbitan fatty acid ester such as coconut oil fatty acid sorbitan; polyoxyethylene hydrogenated castor oil such as polyoxyethylene (25) hydrogenated castor oil; one or more selected from polyglycerin fatty acid ester; sucrose fatty acid ester It is.
Especially, it is preferable that they are 1 type (s) or 2 or more types chosen from the thing of the range of HLB8.5-16, especially 2 or more types from which an HLB value differs in the point of the expression improvement of smooth feeling. Furthermore, it is preferable that it is 1 type (s) or 2 or more types chosen from the thing of the range of HLB10-15, especially 2 or more types from which an HLB value differs. Here, the HLB value is obtained by the Griffin equation (J. Soc. Cosmet. Chem., 1, 311 (1949)).

  The content of the component (D) in the bath preparation composition is the emulsifying dispersibility of the oily component (such as rapid phase inversion and good emulsification dispersion when added to bath water), moist feeling after bathing, skin irritation, From the viewpoint of storage stability, 0.01 to 10% by mass, more preferably 0.1 to 8% by mass, and particularly preferably 0.2 to 5% by mass.

  Furthermore, in the bath agent composition of the present invention, in addition to the above, components that are used in ordinary bath agents, for example, inorganic acids, oxides, organic salts, acids, alkalis, etc., as long as the effects of the present invention are not impaired. pH adjusters, water-soluble polymers, water extracts of animals and plants, various medicinal ingredients such as herbal medicines and vitamins, clouding agents such as mica powder and neutral clay, pigments and pigments, fragrances, bactericides, preservatives Further, an antioxidant or the like can be appropriately contained.

  The bath agent composition of the present invention is solid and includes tablet, granule, and powder forms. For these forms, conventional mixing, granulation, and tableting techniques may be used.

  The solid bath agent composition of the present invention can be used as a bath agent for a whole body bath or a partial bath, and may be used by putting it in bath water before bathing. By simply adding it to the bath water, the ingredients are easily dispersed uniformly in the bath water, so that the skin can be given a smooth and clinging skin feel.

The components shown in Tables 1 to 4 were mixed and molded, and powder type (Tables 1 and 2) and tablet type (Tables 3 and 4) bath preparations were produced according to a conventional method.
Regarding the obtained bath preparation, the presence or absence of blocking for the powder type, the presence or absence of tableting failure for the tablet type, and the skin feel during bathing and 30 minutes after bathing were evaluated by the following methods. The results are also shown in Tables 1 to 4.

(Evaluation method)
Blocking: After production of the powder type, the presence or absence of blocking was confirmed according to the following criteria.
Tableting failure: After producing 10 tablet types, the presence or absence of tableting failure was confirmed according to the following criteria.
Skin feel during bathing and after 30 minutes of bathing: Each bath preparation composition (powder: 30 g, tablet: 45 g) was dissolved in 40 L, 150 L bath water by 5 healthy skinners. After bathing for 10 minutes, the skin feel during bathing (moist feeling, smooth and clingy feeling) was subjected to sensory evaluation according to the following criteria, and the average score was determined. The bath was then bathed, and the feel (moist feeling) of the skin after 30 minutes was subjected to sensory evaluation according to the following criteria to obtain an average score. However, the skin feel was not evaluated for the bath composition having blocking and tableting troubles.

[Presence of blocking]
○: No blocking ×: Blocking [Presence of tableting failure]
◎: No tableting obstacles (10 tablets manufactured, no tableting obstacles recognized)
○: No tableting problems (manufactured 10 tablets, and 1 or 2 tablets have tableting problems such as capping and sticking)
×: Tableting failure (manufactured 10 tablets, and tableting failures such as capping and sticking are recognized in 3 tablets or more)
[Moist feeling]
3; very moist.
2; Slightly moist.
1; not moist (equivalent to Sarayu).
[Smooth and clever feel]
3; It feels very smooth and clinging.
2; Feels slightly smooth and clinging.
1; Doesn't feel smooth and cluttered (equivalent to Sarayu)

(result)
As is apparent from Tables 1 to 4, when the bath agent composition of the present invention was added to bath water, a very smooth and clinging good skin feel that could not be achieved with conventional bath agents was achieved during bathing. . Moreover, the bath agent composition of the present invention could be produced without causing tableting trouble or blocking.

Claims (5)

The following components (A) and (B),
(A) Average moles of ethylene oxide added per one ethylene oxide chain (EO addition molar number / EO chain number) is 30 to 300, and, tri C ₈ ~ ethylene oxide chain number is 3-4 C ₂₄ fatty acid polyoxyethylene sorbitan (120 to 300 EO) 0.1 to 18% by mass
(B) 10 to 99% by mass of inorganic salts
A solid bath agent composition comprising: The solid bath agent composition according to claim 1 , wherein the mass ratio (A) / (B) of the component (A) to the component (B) is 0.0011 to 1.8. Furthermore, (C) The solid bath agent composition of Claim 1 or 2 containing an oil-based component. Furthermore, the solid bath agent composition as described in any one of Claims 1-3 containing nonionic surfactant (D) other than a component (A). The solid bath agent composition according to any one of claims 1 to 4 , wherein the component (B) contains a carbonate and further contains a component (E) acid.