JP2788709B2 - Bath composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bath composition which has a heat retaining effect and an excellent effect of preventing the skin from sticking.

[0002]

2. Description of the Related Art Bath compositions generally include sodium sulfate,
A mixture of inorganic salts such as sodium bicarbonate mixed with fragrances and pigments to give aroma and color to the bath water and to restore fatigue by relaxing the blood circulation and warming effect of the action of inorganic salts Things.

[0003] However, although the conventional bath composition can provide a heat retaining effect, the skin may become bulky after bathing.
Of course, even in a fresh water bath not using the bath additive composition, the skin is often dried due to the hot water and the skin feels bulk after bathing. In addition, consumer preference for the bath composition,
Products that have traditionally promoted the heat retention effect have changed to products that have a beautiful skin effect.

[0004]

Under these circumstances, in recent years,
For the purpose of improving the bulkiness of the skin after bathing, oily substances,
Examples of blending a water-soluble polymer, a plant extract, a milk component and the like are seen. However, there are drawbacks such as insufficient effect, and conversely, a sticky feeling and a blocked feeling appear, and therefore, a material excellent in usability has been desired.

[0005]

Means for Solving the Problems In view of such circumstances, the present inventors have conducted intensive studies and as a result, the present inventors have found that inorganic salts, water-soluble
Of eutectic and anhydrous sodium sulfate (hereinafter referred to as water-soluble silk
The present invention has been found to be able to provide a bath preparation composition which has a moisturizing effect, prevents bulkiness of the skin after bathing, and has no sticky feeling or blockage feeling by containing oil-based substances. Was completed.

[0006] That is, an object of the present invention is to provide a bath composition which has a heat retaining effect and an excellent effect of preventing bulkiness of the skin.

To achieve the above object, the bath composition of the present invention has the following constitution. That is, the present invention is a bath agent composition containing an inorganic salt, a water-soluble silk doubling salt bath, and an oily substance.

Hereinafter, the present invention will be described in detail. As the inorganic salts used in the present invention, one or two of sodium bicarbonate, sodium thiosulfate, sodium sulfate, sodium chloride and potassium chloride, which have a high heat retaining effect and a small difference in bulk specific gravity from water-soluble silk double-glazed glass, are used. More than one kind can be blended, but sodium bicarbonate, sodium sulfate and sodium chloride are particularly preferred. The amount of the inorganic salt is preferably 10 to 99% by weight with respect to the bath composition.

The water-soluble silk double-glazed salt used in the present invention is prepared by adding sodium sulfate to a silk aqueous solution as an anhydride.
% (G / ml) or less, freeze-dried, and triturated with anhydrous sodium sulfate in the form of crystals homogeneous (eutectic). This water-soluble silk double-sprayed glass is uniform without separation in the powder mixing tank because the silk component is kept in a state of easy solubility in water and there is no difference in bulk specific gravity with the inorganic salt used in the bath composition. In addition, since the composition has a low hygroscopic property, the bath composition has features such as not being wet during storage. Sodium sulfate salt-outs an aqueous silk solution to produce granular or viscous silk components.
% (G / ml) or less.

[0010] As proposed in Japanese Patent Publication No. 57-4723, an aqueous solution of silk includes an aqueous solution of copper-ethylenediamine, an aqueous solution of copper hydroxide-ammonia, an aqueous solution of copper hydroxide-alicyclic-glycerin, an aqueous solution of lithium bromide, calcium, It is produced by dissolving a refined silk material in at least one solvent selected from the group consisting of an aqueous solution of magnesium or zinc hydrochloride, a nitrate thereof or a thiocyanate thereof, and an aqueous solution of sodium thiocyanate, followed by dialysis. Furthermore, as proposed in Japanese Patent Publication No. 59-31520, the silk aqueous solution obtained by the above method can be obtained by hydrolysis with an enzyme, acid or alkali. The silk powder obtained by spray-drying or freeze-drying these silk aqueous solutions has a lower dissolution rate as a raw material for the bath agent than the inorganic salt, and when mixed with a bath, the silk powder is dissolved even after the inorganic salt is dissolved. The water-soluble silk component is suspended in water or on the surface as a foreign substance and deteriorates the product image. Therefore, the water-soluble silk component is used as a water-soluble silk double-sprayed salt which is double-dispersed in the form of eutectic with anhydrous sodium sulfate.

The average degree of polymerization of the silk component is preferably from 2 to 2,000, more preferably from 4 to 100. Also,
The protein concentration of the aqueous silk solution is usually preferably from 0.1 to 20% by weight, more preferably from 0.2 to 10% by weight. Furthermore, the proportion of the silk component in the water-soluble silk doubled bromide is preferably 1 to 50% by weight, more preferably 5 to 20% by weight. It is preferable that the amount of the water-soluble silk double-glazed salt mixed is 0.05 to 90% by weight based on the amount of the bath composition.

The oily substance used in the present invention has a freezing point of 3
Natural oils and fats or hydrogenated products thereof, squalane, squalene, ester oils and the like at 0 ° C. or lower. Among them, ester oil is preferred. The compounding amount of the oily substance is preferably 0.5 to 10% by weight based on the bath composition. Abogado oil, almond oil, olive oil,
Sesame oil, cocoa oil, safflower oil, soybean oil, corn oil, rapeseed oil, persic oil, castor oil, jojoba oil,
Palm oil, palm kernel oil, coconut oil and the like. Also,
Isopropyl myristate as the above ester oil,
Isopropyl palmitate, myristyl myristate,
Isocetyl myristate, oleyl oleate, decyl oleate, octyldodecyl oleate, octyldodecyl myristate, cholesterol isostearate, glyceryl myristate, lanolin fatty acid octyldodecyl, lanolin fatty acid isopropyl, reduced lanolin, liquid lanolin, myristate glyceride, 2. -Ethylhexanoic acid glyceride and the like.

Further, in addition to the above essential components, a surfactant may be added to the bath agent composition of the present invention, if necessary, so that oily substances do not float on the surface of the bath when dissolved in bath water. Can be. Nonionic and anionic surfactants are suitable as surfactants. For example, sodium lauryl sulfate, polyoxyethylene lauryl ether sodium sulfate, lauric acid diethanolamide,
Glycerin monostearate, polyethylene glycol monostearate, polyoxyethylene glyceryl monostearate, propylene glycol monostearate, sorbitan monolaurate, polyoxyethylene sorbitan monooleate, polyoxyethylene cetyl ether, polyoxyethylene oleyl ether, Examples include polyoxyethylene hydrogenated castor oil, polyoxyethylene glyceryl triisostearate, fatty acid soap, N-acyl glutamate, and the like.

The bathing composition of the present invention may further contain the following commonly used raw materials for the bathing composition, but are not particularly limited thereto.

A) Inorganic salts sodium carbonate, sodium sesquicarbonate, magnesium carbonate, borax, calcium nitrate, potassium nitrate, sodium nitrate, aluminum sulfate, sodium polyphosphate,
Ammonium chloride, iron sulfate, sodium phosphate, magnesium sulfate, calcium oxide, magnesium carbonate, sodium sulfide, potassium sulfide, etc.

A) Organic acids Succinic acid, fumaric acid, malic acid, tartaric acid, citric acid and the like.

C) Polyhydric alcohols such as glycerin, polyethylene glycol, dipropylene glycol, and sorbitol.

D) Water-soluble polymers Sodium alginate, xanthan gum, polyvinyl alcohol, carboxyvinyl polymer and the like.

E) Herbal medicines, herbs, such as chimpanzees, touki, carrots, peonies, shobu, perilla, mugwort, chamomile, peppermint, giant pak, peach, aloe, loofah and the like.

F) Pigments Blue No. 1, Blue No. 2, Yellow No. 4, Yellow No. 5, Yellow 202
No. (1), red No. 106, orange No. 205, riboflavin and the like.

G) Fragrances

The bath composition of the present invention can be produced by uniformly stirring and mixing the above components. In this case, the mixer should just be what is usually used for stirring and mixing powder. For example, a V-shaped mixer, a ribbon mixer and the like can be mentioned. The obtained bulk may be used as a powder in a bath, or may be compressed and used as a tablet.

[0023]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. The methods and evaluation items used in the present invention are as follows. In addition,% shown in the examples is% by weight.
It is.

(Evaluation Test Method) Ten subjects were bathed in hot water containing Examples or Comparative Examples, and the following items were evaluated by each person.・ Moisturizing effect ・ Anti-crusty effect ・ Stickiness

Examples 1 to 3 and Comparative Examples 1 to 3 Each component shown in Table 1 was mixed and stirred with a ribbon mixer for 30 minutes to prepare a bath agent composition. Then hot water 180 at 41 ° C
In each l, 30 g of each bath agent composition was dissolved, and 10 test subjects were bathed.

[0026]

[Table 1]

The water-soluble silk doubling salt used in the above examples was prepared by the following production method. Using raw silk debris as a raw material for silk, 100 parts of this were stirred and refined with a solution of 30 parts of Marcel soap and 3000 parts of water at 95 to 98 ° C. for 3 hours to reduce residual glue to 0.1% by weight or less, and washed with water. Thereafter, hot air drying was performed at 80 ° C. On the other hand, 100 parts of calcium chloride and 100 parts of water were mixed to prepare 200 parts of a 38% by weight aqueous solution of calcium chloride, and heated to 110 ° C. 40 parts of the refined raw silk waste was added to the kneader while stirring for 5 minutes using a kneader, and further stirred for 30 minutes to completely dissolve.

Next, 2,000 regenerated cellulose-based hollow fibers having an inner diameter of 200 μm, a membrane pressure of 20 μm and a length of 500 mm were bundled,
Using a hollow fiber type dialysis device in which both ends were focused and fixed (sealed) without closing the hollow hole, the solution was introduced at a rate of 0.3 l / hour and dialyzed with deionized water. A silk aqueous solution was obtained. The aqueous silk solution had a fibroin concentration of 10.5% by weight and a residual calcium chloride of 0.001% by weight.

To the aqueous silk solution, bioprolase conc (produced by Nagase Seikagaku Corporation), which is a proteolytic enzyme, was added in an amount of 1.0% by weight based on the solid content of silk fibroin.
The reaction was performed for 4 hours while the temperature was raised from 70 ° C to 70 ° C. Then boil for 15 minutes to complete the reaction, and after cooling,
Filtration through a membrane with a pore size of 0.6 μm gave a clear solution of hydrolyzed silk. The measurement results of the average degree of polymerization of the peptide were as follows:
Nine.

The silk component concentration of the hydrolyzed silk aqueous solution was 10.0% by weight.
(G / ml) of anhydrous sodium sulfate aqueous solution (800 ml), and distilled water was added to make 1000 ml, thereby producing a clear silk / sodium sulfate aqueous solution. The aqueous solution contained 2.0% by weight (g / ml) of a silk component and a sodium sulfate component of 8.
It was 0% (g / ml).

Next, the aqueous solution was freeze-dried. In lyophilization, the aqueous solution was rapidly cooled to -30 ° C and frozen. This is 0.5 torr at the beginning of drying and 0.05 torr at the end of drying.
This was dried by a conventional freeze-drying method of about r to obtain 100 g of pure white and homogeneous cake-like water-soluble silk double-sprayed glass. This was pulverized to prepare a powdery water-soluble silk double-dispersed glass.

Table 2 shows the results of the bathing evaluation questionnaire.

[0033]

[Table 2]

As shown in Table 2, the examples were excellent in all evaluation items.

[0035]

The bath composition of the present invention has no sticky feeling after use, has a heat retaining effect, and the combination of the present invention synergistically exerts the effect of preventing the skin from sticking after bathing, so that the skin becomes moist. The feeling is improved, and no turbidity or foreign matter floats after the bath agent is put into the bath, and the bath agent composition is extremely excellent.

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Shinichi Onishi 5-15-1, Ginza, Chuo-ku, Tokyo Kanebo Co., Ltd. Examiner in the Cosmetics Division Megumi Saito (56) References JP-A-5-78232 (JP, A JP, 6-24935 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) A61K 7/00-7/50

Claims (1)

(57) [Claims] 1. Inorganic salts, water-soluble silk and anhydrous sodium sulfate
A bath composition comprising a eutectic of lithium and an oily substance.