JP3479403B2 - Bath composition - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a bath agent composition capable of improving the itchiness of the skin and providing a smooth skin feel.

[0002]

BACKGROUND OF THE INVENTION Bath salts are generally Glauber's salt, borax, sulfur,
Inorganic salt mixtures such as carbonates and oily components (for example, JP-A-2-
No. 115117) and the like containing a fragrance, a coloring agent, a plant extract, an organic acid, etc., to keep the skin clean, to give a scent and color to the bath water, to improve fatigue recovery and metabolism, to give a warm feeling, It enhances the skin care effect. In recent years, plant extracts such as fermented rice extract, garlic extract and jojoba oil have been used for the purpose of improving the skin care effect against various skin conditions associated with eczema, atopic dermatitis, dry dermatitis and the like.

Of these, plant extracts such as rice fermented extract, garlic extract, jojoba oil and the like are currently poorly recognized by clinical and consumers, but oats ( Avena)
sativa Linne) seed powder, especially in the United States,
Since ancient times, it has been marketed as a drug as an active ingredient of bath salts for the purpose of treating skin inflammation, diseases, and itching caused by trauma, and has received great support from clinical and consumers. As a typical product, colloidal oatmeal blended with AVEENO (trademark: S.C. Johnson) is known.

However, bath water using oat seed powder has an effect on skin irritations, illnesses, and itchiness caused by trauma, but it contains a large amount of insoluble components in the bath water, and thus bubbles, dirt, and turbidity. However, precipitates were generated, and its application was not generally widespread.

In order to solve this problem, a product has been developed in which powder of oats seeds is efficiently dispersed in the bath water to suppress bubbles, turbidity, and precipitates in the bath water due to insoluble components as much as possible. 261116), the effect was recognized by many US consumers, and the utilization of oat seed powder has been increased.

[0006] However, the problems of foaming, stains, turbidity, and precipitates of bath water due to insoluble components still remain, and the present situation is that a fundamental solution has not been reached.

On the other hand, there are many people who complain of bulkiness and itching of the skin after bathing, especially in winter, due to the loss of oil from the skin due to the bathing. Under the present circumstances, these people usually use various skin care products such as lotions and creams after bathing in order to suppress the bulkiness of the skin after bathing. However, when using a skin care product, labor is required for its application work, and it is difficult for an elderly person to apply the skin care product to every corner of the body. Therefore, there is an attempt to prevent the loss of oil from the skin by taking a bath by blending a bath agent with an oil or a moisturizer (JP-A-2-115117).
JP-A-5-221851).

However, according to the research conducted by the present inventor, it has been found that this oat seed powder exhibits a high anti-inflammatory effect in bath water. It has also become clear that it is not possible to achieve sufficient effects.

[0009]

SUMMARY OF THE INVENTION It is, therefore, an object of the present invention to provide a bath preparation composition which can improve the itchiness of the skin and which gives a smooth skin feel.

[0010]

Means for Solving the Problems In view of such circumstances, the present inventor has conducted diligent research, and as a result, glycerin and polyoxyethylene alkyl ether phosphate were extracted from oat seeds using a specific solvent. The present invention has been completed, and it was found that a combination of the above can provide a bath preparation composition that improves the itching of the skin and can provide a smooth skin feel.

That is, the present invention provides the following component (A),
(B) and (C): (A) From seeds of oats ( Avena sativa Linne),
An extract extracted using water or / and a water-soluble organic solvent,
The present invention provides a bath agent composition containing (B) glycerin and (C) polyoxyethylene alkyl ether phosphate.

As mentioned above, it is already known that oats seeds are used as a powder in a bath salt, but the extract from this is used as a cosmetic mainly in Europe and North America, and Used as a skin care agent (Fragrance Journal Extra Edition No. 6
(1986)) only. That is, it is used as an external preparation applied to the skin in the form of a cosmetic, and there is no example of a form used as a bath agent. The reason for this is that the effectiveness of oats in the bathing system has not yet been scientifically clarified, and the existence of the active ingredient itself has not been clarified.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The oats extract of the component (A) used in the present invention is oat ( Avenasativa Linn).
It is obtained by extracting from the seed of e). Extraction from oats seeds needs to be performed using water and / or a water-soluble organic solvent in order to efficiently obtain the active ingredient. Examples of the water-soluble organic solvent used here include methanol, ethanol, propanol, butanol, propylene glycol, and 1,3-butylene glycol. Among them, ethanol, butanol, propylene glycol, and 1,3-butylene are preferred. Glycol is preferred. The water-soluble organic solvent may be used alone or in combination of two or more, and it is preferable to combine it with water. The amount of the solvent to the oats is preferably 1 to 20 times by weight.

On the other hand, the oats used as a raw material are preferably coarse powder or powder rather than being used for extraction as it is. The oats may be extracted by immersing the oats in the above extraction solvent and performing the extraction by a conventional method, but if necessary, the extraction efficiency may be increased by heating to about 50 ° C. Further, if the extract as it is or after being concentrated is fractionated with a solvent and only the effective fraction is taken out, a higher effect can be expected with a smaller amount. The solvent used for fractionation here is preferably water and ethyl acetate, and it is preferable to use this water fraction.

The extract thus obtained may be concentrated if necessary and further powdered with an excipient. Any excipient may be used as long as it ensures stability, but generally, a polysaccharide such as dextrin or an inorganic powder such as calcium silicate is used.

The amount of the extract obtained as described above to be added to the bath agent composition is not particularly limited, but 0.015 g of the seed powder of oats is used per 150 to 200 l of standard bath water.
The amount of the extract obtained from 01 to 1000 g is preferable, and the amount of the extract obtained from 0.01 to 100 g of bulk powder is more preferable. This amount is 0.001g
If the amount is less than the above, a sufficient effect may not be obtained, and even if the amount exceeds 1000 g, there is a lot of waste, and cloudiness or coloring of the bath water may occur. Occurrence and coloring are likely to occur.

The amount of component (B), glycerin, used in the present invention is not particularly limited, but is 0.1 to 0.1% based on the total composition.
It is preferable to add 50% by weight (hereinafter referred to simply as%), and particularly preferably 1 to 40%, and more preferably 1 to 20% because the smooth skin feel is increased.

The polyoxyethylene (hereinafter abbreviated as POE) alkyl ether phosphate as the component (C) used in the present invention is not particularly limited, but HLB 8 to 1
7, especially HLB 10 to 17 are preferable. Examples of such POE alkyl ether phosphates include P
OE sodium lauryl ether phosphate, sodium POE cetyl ether phosphate, sodium POE oleyl ether phosphate, etc. are mentioned.

The amount of these POE alkyl ether phosphates to be added to the bath agent composition of the present invention is not particularly limited, but it is preferably 0.01 to 20% in the total composition, particularly 0. It is preferable to add 0.011 to 10%, more preferably 0.1 to 8%, because the components can be uniformly dispersed in the bath water and the effect can be further enhanced.

By adding an oily component to the bath agent composition of the present invention, the smoothness of the skin can be further enhanced.

As the oily component used here, fats and oils,
Examples thereof include waxes, hydrocarbons, higher fatty acids, higher alcohols, esters, essential oils and silicone oils.

Specifically, as the oils and fats, for example, soybean oil, bran oil, jojoba oil, avocado oil, almond oil, olive oil, cocoa oil, sesame oil, persic oil, castor oil, coconut oil, mink oil, beef tallow, Examples thereof include natural fats and oils such as lard, hardened oils obtained by hydrogenating these natural fats and oils, and synthetic triglycerides such as myristic acid glyceride and 2-ethylhexanoic acid triglyceride.

Examples of the waxes include carnauba wax, whale wax, beeswax, lanolin and the like. Examples of the hydrocarbons include liquid paraffin, petrolatum, paraffin, microcrystalline wax, ceresin, squalane, blistan and the like.

Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, linolenic acid, lanolinic acid and isostearic acid.

Examples of higher alcohols include lauryl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, lanolin alcohol, cholesterol and 2-hexyldecanol.

Examples of the esters include cetyl octanoate, triglyceride octanoate, myristyl lactate,
Examples thereof include cetyl lactate, isopropyl myristate, myristyl myristate, octyldodecyl myristate, isopropyl palmitate, isopropyl adipate, butyl stearate, decyl oleate, cholesterol isostearate, and POE sorbit fatty acid ester.

Examples of the essential oils include peppermint oil, jasmine oil, show brain oil, cypress oil, spruce oil, ryu oil,
Turpentine oil, cinnamon oil, bergamot oil, mandarin oil, orange oil, yuzu oil, ginger oil, pine oil, lavender oil, bay oil, clove oil, hiba oil, rose oil, eucalyptus oil, lemon oil, thyme oil, peppermint Oil, rose oil,
Sage oil, menthol, cineole, eugenol, citral, citronellol, citronellal, borneol, linalool, geraniol, phenylethyl alcohol, benzyl acetate, camphor, thymol,
Examples thereof include spilanthol, pinene, limonene, and terpene compounds.

Examples of silicone oils include dimethylpolysiloxane.

Among these oily components, myristic acid glyceride, 2-ethylhexanoic acid triglyceride,
Lanolin, liquid paraffin, petrolatum, paraffin microcrystalline wax, squalane, lauric acid,
Myristic acid, palmitic acid, linoleic acid, linolenic acid, isostearic acid, cetyl alcohol, stearyl alcohol, oleyl alcohol, cholesterol, cetyl octanoate, triglyceride octanoate, octyldodecyl myristate, isopropyl myristate,
It is preferable to use cholesterol isostearate, POE sorbitol fatty acid ester, peppermint oil, spruce oil, cinnamon oil, rose oil, menthol, cineole, eugenol, citral, citronellal, geraniol, pinene, limonene, dimethylpolysiloxane.

These oily components can be blended alone or in combination of two or more, and the blending amount can be appropriately selected according to the dosage form (form) of the bath salt, and usually,
It is preferable to add 0.1 to 95%, particularly 0.5 to 80%, and further 10 to 80% of the total composition.

If desired, a dispersion / emulsifier of an oily component can be added to the bath agent composition of the present invention.
The dispersant / emulsifier functions to prevent the oily components in the bath agent from floating on the water surface when the bath agent is dissolved in the bath water, and also causes the bath water to become cloudy, giving a high-class image like a milk bath. it can.

Examples of such dispersion / emulsifiers include water-soluble polymer compounds and surfactants. Among them, the water-soluble polymer, for example, sodium alginate, propylene glycol alginate, gum arabic, xanthan gum, pectin, tragacanth, sodium carboxymethylcellulose, methylcellulose, carboxyvinyl polymer, polyethylene glycol, polyvinyl alcohol, polyvinylpyrrolidone, milk protein, Soybean protein, gelatin, egg protein, sodium caseinate, whey protein and the like can be mentioned, and gums such as gum arabic and xanthan gum and water-soluble proteins such as casein sodium and whey protein are particularly preferable.

As the surfactant, anionic,
Although any of cationic, nonionic, natural and synthetic surfactants can be used, it is preferable to use a nonionic surfactant in consideration of skin irritation. Examples of the nonionic surfactant include glycerin fatty acid ester, propylene glycol fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene glycol, polyoxyethylene polyoxypropylene. Examples thereof include alkyl ethers, polyoxyethylene glycol fatty acid esters, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, and polyglycerin fatty acid esters. These dispersion / emulsifiers can be used alone or in combination of two or more, and the blending amount thereof is preferably 5 to 100%, particularly preferably 20 to 100% with respect to the oily component.

The bath agent composition of the present invention may further contain the following known bath agent raw materials which are commonly used in bath agents, but the bath agent raw materials which can be blended are limited to those exemplified below. It is not something that will be done.

(A) Inorganic compounds and inorganic salts: sodium chloride, potassium chloride, ammonium chloride, sodium hydrogen carbonate, sodium carbonate, sodium sulfate, sodium sesquicarbonate, calcium carbonate, magnesium carbonate, potassium sulfide, sodium sulfide, calcium oxide, Magnesium oxide, potassium nitrate, sodium nitrate, calcium nitrate, iron sulfite, metasilicic acid, silicic acid anhydride, neutral clay, sodium thiosulfate, sodium polyphosphate, sodium metaphosphate, sodium phosphate, calcium hydrogenphosphate, potassium bromide , Slaked lime, sodium hyposulfite,
When compounding these inorganic compounds or inorganic salts such as calcium thiosulfate, sodium hydroxide, mica powder, boric acid, and borax,
It is preferable to add 5 to 95%, especially 10 to 80% of the total composition.

(A) Organic acids and salts thereof: adipic acid,
Benzoic acid, malic acid, tartaric acid, malonic acid, citric acid, lactic acid, succinic acid, fumaric acid, etc.

In the bath agent composition of the present invention, when an organic acid and a carbonate are used in combination, a foaming bath agent capable of generating carbon dioxide in bath water can be obtained. 5 to 80%, especially 10 to 50% is preferably contained therein, and the organic acid is 10 to 300%, especially 30% of the carbonate.
It is preferably blended in an amount of 150%. Further, in order to dissolve carbon dioxide generated in the bath water in the bath water and obtain the blood circulation promoting effect by the dissolved carbon dioxide, the bath water is weakly acidic (preferably pH 5 to 7, particularly preferably in the bath agent composition). Preferably
It is preferable to add an acid component for adjusting the pH to 6 to 6.7). Such an acid component is not particularly limited, but it is preferable to add the organic acid in excess.

(C) Herbal medicines, Chinese herbs, herbs: euglena, juniper, valerian, pearl oyster, pearl nut,
Senkyu, spruce, touki, jasmine, ginger, carrot, cinnamon, peony, peppermint, sardine, sanshishi, butterbur, dokukatsu, ginger, gall, pine beetle, juniper, sardine, camphor, saffron, oleander, fennel, chinen, chinen Chamomile, peach leaf, rosemary, melissa, horse chestnut, arnica, sage, etc.

(D) Dyes: Blue No. 1, Blue No. 2, Yellow No. 4, Yellow No. 5, Green No. 3, Green No. 4, Green No. 204,
Yellow dye No. 202 (1) and other tar dyes specified by the Ordinance of the Ministry of Health and Welfare, natural dyes recognized as food additives such as chlorophyll, riboflavin, crocin, anthraquinone, cochineal, canthaxanthin, safflower, etc. etc

(E) Vitamin: Vitamin A, vitamin B, vitamin C, vitamin D, vitamin E, etc.

(F) Polyhydric alcohols: butylene glycol, propylene glycol, sorbitol, dextrose, mannitol, etc.

(G) Fine powder: Generally called cosmetic powder, such as acrylic resin, styrene resin, epoxy resin, silicone resin, nylon, polyethylene, polypropylene, polyvinyl chloride, PET, polytetrafluoroethane, etc. Polymer compounds, copolymers of these polymer compounds, calcium silicate, natural aluminum silicate, synthetic aluminum silicate, zeolite, titanium oxide, talc, kaolin, mica, bentonite, etc.

(H) Others: Yunohana, sulfur, casein, sodium salicylate, bran, mica powder, dextrin, neutral clay, skim milk powder, urea, amino acids and the like can be added. Furthermore, the bath agent composition of the present invention is, in addition to those described above, a bactericidal preservative (eg, benzoic acid ester, sorbic acid, etc.), a sequestering agent (eg, ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid), if necessary. (NTA) etc.), and other compounding agents such as proteolytic enzymes can be added.

In addition, a suitable amount of water in the range of 0.01 to 90% is added to the bath agent composition of the present invention prepared as described above to increase the stability of the preparation or to emulsify the preparation. Can also be

The bath composition of the present invention can be made into an arbitrary dosage form such as powder, granules, tablets, liquids and emulsions by uniformly stirring and mixing the above components in a mixer or the like by a conventional method. Especially, liquid and emulsion dosage forms are preferable.

[0046]

EFFECTS OF THE INVENTION The bath agent composition of the present invention is capable of improving the itchiness of the skin and providing a smooth skin feel.

[0047]

EXAMPLES Next, the present invention will be described with reference to examples, but the present invention is not limited to these examples.

Production Example 1 (Extract from oat seeds) 5 kg of a mixture of ethanol: purified water (1 volume: 1 volume) with 1 kg crude powder of oat seeds
Is added, and the mixture is extracted with stirring at 50 ° C. for 10 hours. After filtering the solids, the filtrate was concentrated under reduced pressure at 60 ° C or lower until the total amount became about 1/10 volume, 0.5 kg of ethyl acetate was added, and the mixture was sufficiently stirred and allowed to stand, and the liquid was separated to form a lower layer. Get the part. The lower layer was concentrated under reduced pressure to obtain a brown viscous product (oats seeds 1 kg → 0.10 kg). 1 g of this product corresponds to 10 g of oats seeds.

Example 1 Liquid bath compositions having the compositions shown in Tables 1 and 2 were produced by a conventional method, and the effect of improving the itching of the skin and the smooth feeling of the skin were evaluated. The results are shown in Tables 1 and 2.

(Evaluation method) (1) Effect on itching of the skin: 1 shown in Table 1 and Table 2
The bath agent composition in the amount used per time is put into a bath filled with 150 L of hot water at 40 ° C. 10 minutes after the injection, the hot water was sufficiently stirred, and then each subject (n = 5) was bathed for 5 minutes,
The effect on itching of the skin was judged according to the following criteria and shown as the average score. 5 points: Suppresses itch very much. 4 points: Itching is well suppressed. 3 points: Suppress itching. 2 points: Slightly suppress itching. 1 point: Itching is not suppressed.

(2) Smoothness of skin: The bath agent composition used in the amounts shown in Tables 1 and 2 at 40 ° C. and 150 ° C.
Pour into a bathtub filled with L of hot water. After 10 minutes from the addition, each subject (n = 5) was allowed to bathe for 5 minutes after sufficiently stirring hot water, and the smoothness of the skin was judged according to the following criteria, and the result was shown as the average score. 5 points: Very smooth. 4 points: Smooth and smooth. 3 points: Smooth. 2 points: A little smooth. 1 point: equivalent to Sarayu.

[0052]

[Table 1]

[0053]

[Table 2]

As is clear from the results shown in Tables 1 and 2,
It can be seen that all of the products of the present invention containing the oats extract, glycerin and POE alkyl ether phosphate are superior in the effect of improving the itching of the skin and the smooth feeling of the skin, as compared with the comparative product.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Ichii 2606, Akao, Kai-cho, Haga-gun, Tochigi Prefecture Kao Corporation Research Institute (72) Inventor Hidenori Man, 2606, Akabane, Kai-cho, Haga-gun, Tochigi Research Institute (56) ) Reference JP-A-8-231380 (JP, A) JP-A-8-231378 (JP, A) JP-A-4-261116 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB) Name) A61K 7/00-7/50 A61K 35/78

Claims (2)

(57) [Claims] 1. The following components (A), (B) and (C): (A) From seeds of oats ( Avena sativa Linne),
An extract extracted using water or / and a water-soluble organic solvent,
A bath agent composition containing (B) glycerin and (C) polyoxyethylene alkyl ether phosphate. 2. The bath agent composition according to claim 1, wherein the water-soluble organic solvent is one or more selected from ethanol, butanol, propylene glycol and 1,3-butylene glycol.