JPH0362692B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to bath additives, and more particularly to bath additives that do not leave the bath cold and leave the skin feeling good after bathing. [Prior art] Bath additives are generally a mixture of inorganic salts such as mirabilite, borax, sulfur, and carbonates, as well as fragrances, colorants, plant extracts, and
It is a mixture of organic acids, etc., which gives scent and color to the bath water, and provides moderate stimulation to the skin, activating blood circulation, recovering from fatigue, and promoting metabolism. Among these bath preparations,
There are effervescent bath additives that combine carbonate and acid, and these have the effect of generating carbon dioxide gas bubbles in bath water, increasing the feeling of relaxation and refreshment, and making bathing more enjoyable. However, conventional foaming bath additives are neutral or slightly alkaline, and almost all of the carbon dioxide gas generated does not dissolve in the water and evaporates into the air, so the carbon dioxide bubbles are simply a sensation. It had only a mechanical effect. The present inventors first created a bath additive that contains carbonate and acid and has a slightly acidic PH of the bath water.
We reported a weakly acidic bath additive that retains carbon dioxide gas in the bath liquid, promotes blood circulation, and does not cause the bath to feel cold. [Problems to be Solved by the Invention] However, there has been a desire for a bathing agent that not only provides such bathing effects but also improves the feel of the skin after bathing. [Means for Solving the Problems] As a result of extensive research in order to solve the above problems, the present inventors added an oily component and a specific fine powder together with carbon dioxide gas or a carbon dioxide gas generator. In addition to the above-mentioned bathing effect, by adjusting it to be slightly acidic,
The present invention has been completed based on the discovery that an excellent bath additive can be obtained that gives a moisturizing and refreshing feeling to the skin after bathing and does not leave the skin feeling sticky. That is, the present invention provides (a) carbon dioxide gas or a carbon dioxide generating product, (b) an oily component, (c) a dispersant or emulsifier for the oily component, and (d) a composition having a sedimentation ratio of 50% by weight after 24 hours in water. The present invention provides a weakly acidic bath additive characterized by containing a fine powder having a particle size of 3 microns or less that is substantially insoluble in water in an amount of 3 microns or less. In the present invention, carbon dioxide gas is retained by a carbon dioxide retaining substance such as an aluminosilicate or cyclodextrin, or is used by being sealed under high pressure. The aluminosilicate used as the carbon dioxide retaining substance can be used in any of amorphous, partially crystalline, and crystalline forms, but crystalline forms are preferable. Specifically, natural aluminosilicates such as analcite and chabazite, synthetic zeolites designated by names such as zeolite A, X, and Y are used. Among these, synthetic zeolites represented by the following general formula are preferred as they contain less impurities and other contaminants. _{( M 2 / o O ) _}
1.5, y is 0.8 to 10, z is a number of 0 or more) Among the synthetic zeolites of the general formula, metal atoms represented by M include sodium, potassium, calcium, magnesium, etc., and z is 0, That is, it is preferable that the material contains substantially no water. The particle size of these aluminosilicates is from 0.5 to 100 microns, preferably from 1 to 40 microns. The carbon dioxide retaining substance may be used as a fine powder having the above-mentioned particle size, in the form of granules, pellets, etc., but fine powder is preferable from the viewpoint of effectiveness. Examples of cyclodextrin as a carbon dioxide retaining substance include α-cyclodextrin, β-cyclodextrin, γ-cyclodextrin, and derivatives thereof. Carbon dioxide gas can be adsorbed onto these retention substances by, for example, bringing the retention substances into contact with carbon dioxide gas. The retention material used here, such as an aluminosilicate, is preferably dehydrated by heat treatment and is optimally substantially water-free. The adsorption is preferably carried out under anhydrous conditions at a carbon dioxide pressure of 0.1 Kg/cm ²
The above is preferably carried out at 1 to 10 kg/cm ² . The temperature is 30°C or lower, preferably 20°C or lower, and the time is not particularly limited, but the reaction is preferably carried out until equilibrium is reached. The amount of carbon dioxide gas adsorbed onto the holding material is 2gCO ₂ /
100g retention material or more, especially 5g CO ₂ /100g retention material or more is preferred. The carbon dioxide gas generating substance may be any substance that generates carbon dioxide gas through reaction, and a combination of carbonate and acid is particularly preferred. Examples of the carbonate include sodium hydrogen carbonate, sodium sesquicarbonate, sodium carbonate, potassium hydrogen carbonate, ammonium hydrogen carbonate, magnesium carbonate, calcium carbonate, and the like, and these can be used alone or in combination of two or more. Further, as the acid, both organic acids and inorganic acids can be used, but water-soluble and solid acids are preferred.
Examples of organic acids include succinic acid, glutaric acid,
Dicarboxylic acids such as adipic acid, pimelic acid, and fumaric acid; acidic amino acids such as glutamic acid and aspartic acid; oxyacids such as malic acid, citric acid, and ascorbic acid; benzoic acid, pyrrolidone carboxylic acid, and acid salts of these organic acids. Can be mentioned. Examples of inorganic acids include potassium dihydrogen phosphate and sodium sulfite. Among these, one or more acids selected from the acid represented by the formula: HOOC-( _CH2 ) _o -COOH (in the formula, n represents an integer of 2 to 4) and fumaric acid are preferred. The blending amount of carbonate and acid in the weakly acidic bath additive of the present invention is such that when the bath additive is added to the bath water, the bath water exhibits weak acidity, that is, 0.01% by weight of the bath additive.
It is necessary that the aqueous solution has a pH of 4 to 7, particularly preferably 6.0 to 6.7. If the pH is lower than 4, there is a risk of strong irritation to the skin and damage to the bathtub, etc. If the pH is higher than 7, the effects of the present invention will not be achieved. The effects of carbon dioxide gas of the present invention are as follows:
When the PH is acidic, carbon dioxide gas exists as CO ₂ molecules and exhibits a blood flow promoting effect, but when the PH is alkaline, carbon dioxide gas exists as CO ^2- ₂ ions or HCO ^- ₃ ions, so this effect does not occur. This is because it is based on the principle that it cannot be seen at all. The blending amounts of carbonate and acid to meet these conditions vary depending on their type, but the carbonate should be 5 to 80% by weight, particularly 10 to 50% of the total composition, and the acid should be 5 to 80% by weight.
10-80%, especially 15-50% is preferred. In the present invention, the oil component refers to a component that is insoluble or sparingly soluble in water, is a nonvolatile liquid or solid at room temperature, and is viscous and combustible when in liquid form. , for example, the following: Oils and fats: soybean oil, bran oil, jojoba oil, avocado oil, almond oil, olive oil, cacao butter, sesame oil, persic oil, castor oil, coconut oil, mink oil, beef tallow,
Natural fats and oils such as pork fat, hydrogenated oils obtained by hydrogenating these natural fats and oils, and synthetic triglycerides such as myristic acid glyceride and 2-ethylhexanoic acid glyceride. Waxes: carnauba wax, whale wax, beeswax, lanolin, etc. Hydrocarbons: Liquid paraffin, petrolatum, paraffin, microcrystalline wax, ceresin, squalane, pristane, etc. Higher fatty acids: lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, linolenic acid, lanolic acid, isostearic acid, etc. Higher alcohols: lauryl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, lanolin alcohol, cholesterol, 2-hexyldecanol, etc. Esters: myristyl lactate, cetyl lactate, isopropyl myristate, myristyl myristate, isopropyl palmitate, isopropyl adipate, butyl stearate, decyl oleate, etc. silicone oils. These oily components are used alone or in combination of two or more, and the amount used per time is adjusted so that the amount of special oily components added to the bathwater of the present invention is 10 to 500 ppm, especially 20 to 100 ppm. Preferably, it is blended. The bath additive of the present invention contains a dispersant or emulsifier for oily components so that the special oily components added to the bath water are uniformly dispersed or emulsified. By doing so, when the bath additive is added to the bath water, it is possible not only to prevent the oily components from floating on the water surface, but also to prevent the bath water from becoming cloudy and the transparency of the 0.01% by weight aqueous solution to be less than 40 cm, preferably less than 20 cm. By doing so, it is possible to create a luxurious image similar to a milk bath. The transparency in the present invention is defined as diameter 3
Denotes the depth at which a white disc of cm becomes invisible when submerged in water. Dispersants or emulsifiers used for this purpose include water-soluble polymers, surfactants, etc. Examples of water-soluble polymers include sodium alginate, propylene glycol alginate, gum arabic, xanthan gum, pectin, tragacanth, carboxylic acid, etc. Sodium methylcellulose, methylcellulose, carboxyvinyl polymer, polyethylene glycol, polyvinyl alcohol,
Polyvinylpyrrolidone, milk protein, soybean protein, gelatin, egg protein, sodium caseinate, whey protein, etc. are used.
Gums such as gum arabic and xanthan gum and water-soluble proteins such as sodium caseinate and whey protein are preferred. As the surfactant, anionic, cationic, nonionic, natural or synthetic surfactants can be used. These dispersants or emulsifiers for oily components are preferably blended in an amount of 5 to 100% by weight based on the oily components in the bath additive. Furthermore, the bath additive of the present invention contains fine powder having a particle size of 3 microns or less, which is substantially insoluble in water and has a sedimentation ratio of 50% by weight or less after 24 hours in water. By well dispersing this fine powder in bath water, it is possible to suppress stickiness caused by oily components after bathing and increase the refreshing feel. It is preferable to select the fine powder that satisfies these conditions from among those generally referred to as cosmetic powders, such as acrylic resin, styrene resin, epoxy resin, nylon, polyethylene, polypropylene, polyvinyl chloride, and polyethylene. Terephthalate resin, polytetrafluoroethane, copolymers of these polymers, silicic acid, calcium silicate,
Examples include fine powders of natural aluminum silicate, synthetic aluminum silicate, zeolite, titanium oxide, talc, kaolin, mica, bentonite, and the like. The true specific gravity of the fine powder is preferably close to 1, and it is better to bring the true specific gravity close to 1 by combining, melting, or surface treating powders with light and heavy true specific gravity. Fine powder is effective against oily components in bath additives.
Preferably, it is blended in an amount of 10 to 500% by weight. In addition,
The sedimentation ratio in the present invention is calculated by dispersing 0.5 grams of a sample in a No. 6 Ukena colorimeter tube filled with water to a height of 30 cm, and measuring the dry weight of the sample that has completely settled after 24 hours of standing. It is something. Furthermore, the bath additives of the present invention may contain crude drugs, pigments, vitamins, fragrances, oxygen, and other ingredients necessary for formulation, which are usually included in bath additives. The bath additive of the present invention is produced by adding the above-mentioned optional components to the above-mentioned essential components as needed, and adjusting the bath water so that the bath water exhibits weak acidity when administered. The dosage form can be granules, tablets, emulsion, etc. [Operation and Effects of the Invention] The bath additive of the present invention not only promotes blood circulation in the skin through the action of carbon dioxide gas present in the bath water and exhibits an excellent bathing effect, but also has the oil-based ingredients contained in the bath water. By dispersing it in the water and adhering to the skin, it replenishes the oil content of the skin and moisturizes the skin after bathing, and the action of the fine powder eliminates the sticky feeling, giving a good feeling after bathing. [Example] Next, the present invention will be explained with reference to Examples and Test Examples. Example 1 10 parts by weight DIA (diisopropyl adipate),
10 parts by weight of liquid paraffin, 5 parts by weight of nonionic surfactant (trade name: Emulgen 320, manufactured by Kao Corporation),
After thoroughly mixing 10 parts by weight of calcium silicate and 15 parts by weight of dextrin and pulverizing by a conventional method, 10 parts by weight of this powder, 30 parts by weight of sodium bicarbonate, 15 parts by weight of sodium carbonate, 35 parts by weight of amber, and 2 parts by weight of polyethylene glycol were prepared. parts by weight, 5 parts by weight of sodium sulfate, a coloring matter, and trace amounts of fragrance were added and mixed uniformly, followed by tableting to obtain tablets weighing 50 g each. The tablets were packaged in an aluminum bag and used as a bath additive. Comparative Example 1 (Contains no oily components and fine powder) 30 parts by weight of sodium hydrogen carbonate, sodium carbonate
15 parts by weight, 35 parts by weight of succinic acid, 2 parts by weight of polyethylene glycol 6000, 5 parts by weight of sodium sulfate,
After adding 10 parts by weight of dextrin, a coloring matter, and a trace amount of fragrance, and mixing uniformly, the mixture was compressed to obtain tablets weighing 50 g each.
The tablets were packaged in an aluminum bag and used as a bath additive. Example 2 5 parts by weight DIA (diisopropyl adipate),
200 parts by weight of water was added to 15 parts by weight of liquid paraffin, 2 parts by weight of whey protein, and 40 parts by weight of dextrin, and the mixture was emulsified in a conventional manner, followed by spray drying to obtain a powder. To this powder, add 10 parts by weight of acrylic resin ⁽¹⁾ and 10 parts by weight of sodium hydrogen carbonate.
parts by weight, 5 parts by weight of sodium carbonate, 15 parts by weight of succinic acid, 0.5 parts by weight of polyethylene glycol 6000,
Add a small amount of coloring matter and fragrance, mix uniformly, and then press into tablets.
One tablet weighing 50 grams was obtained. The tablets were packaged in an aluminum bag and used as a bath additive. (1) Acrylic resin: Sedimentation amount after 24 hours: 12% Average particle size: 0.4 microns Maximum particle size: 1 micron or less Comparative example 2 (Contains no carbon dioxide or fine powder) 5 parts by weight of DIA, 15 parts by weight of liquid paraffin , 200 parts by weight of water was added to 2 parts by weight of whey protein and 40 parts by weight of dextrin and emulsified by a conventional method.
This was spray dried to obtain a powder. To this powder were added 20 parts by weight of sodium sulfate, 20 parts by weight of sodium hydrogen carbonate, a coloring matter, and a trace amount of fragrance, and after uniformly mixing, each package of 50 g of powdered bath salts was prepared. Comparative Example 3 (Containing no fine powder) A bath additive was obtained in the same manner as in Example 1 except that 10 parts by weight of calcium silicate was not added. Comparative Example 4 (Contains no carbon dioxide gas generating material) 10 parts by weight of DIA (diisopropyl adipate),
10 parts by weight of liquid paraffin, 5 parts by weight of nonionic surfactant (trade name: Emulgen 320, manufactured by Kao Corporation),
After thoroughly mixing 10 parts by weight of calcium silicate and 15 parts by weight of dextrin and pulverizing it by a conventional method, 10 parts by weight of this powder, 80 parts by weight of sodium bicarbonate, 2 parts by weight of polyethylene glycol 6000, 7 parts by weight of sodium sulfate, and a pigment were added. , fragrance, and a small amount were added, mixed uniformly, and then compressed to obtain tablets weighing 50 g each. The tablets were packaged in an aluminum bag and used as a bath additive. Comparative Example 5 (Contains no oily components) Nonionic surfactant (product name: Emulgen)
320, manufactured by Kao Corporation) 5 parts by weight, calcium silicate 10
After thoroughly mixing 35 parts by weight of dextrin and powdering by a conventional method, 10 parts by weight of this powder, 30 parts by weight of sodium bicarbonate, 15 parts by weight of sodium carbonate, 35 parts by weight of succinic acid, and polyethylene glycol.
6000 2 parts by weight, 5 parts by weight of sodium sulfate, pigment,
Add a small amount of fragrance and mix evenly, then press into tablets, 50 yen per tablet.
g tablets were obtained. The tablets were packaged in an aluminum bag and used as a bath additive. Comparative Example 6 (Contains no dispersant or emulsifier) 15 parts by weight DIA (diisopropyl adipate),
After thoroughly mixing 10 parts by weight of liquid paraffin, 10 parts by weight of calcium silicate, and 15 parts by weight of dextrin and powdering by a conventional method, 10 parts by weight of this powder, 30 parts by weight of sodium bicarbonate, 15 parts by weight of sodium carbonate, and succinic acid were added. 35 parts by weight of sodium sulfate, 5 parts by weight of sodium sulfate, a coloring matter, and trace amounts of fragrance were added and mixed uniformly, followed by tableting to obtain tablets each weighing 50 g. The tablets were packaged in an aluminum bag and used as a bath additive. Test Example 1 Each of the bath additives of Examples 1 and 2 and Comparative Examples 1 to 6 was used by 20 panelists in a conventional manner for 10 days, and the overall evaluation as a bath additive (overall feeling of use),
We investigated the moisturized and refreshing feeling of the skin after bathing, as well as the condition of the hot water. The results are shown in Table 1. The bath additive of the present invention moisturizes the skin after bathing,
Moreover, it is an excellent bathing agent that gives a refreshing feel and is preferred by those who prefer hot water.

【table】

[Table] Example 3 200 parts by weight of water was added to 3 parts by weight of cetanol, 17 parts by weight of liquid paraffin, 5 parts by weight of glyceride monostearate, 2 parts by weight of sodium caseinate, and 40 parts by weight of dextrin, and the mixture was emulsified by a conventional method.
This was spray dried to obtain a powder. To this powder, 10 parts by weight of acrylic resin (same as in Example 2),
10 parts by weight of sodium hydrogen carbonate, 5 parts by weight of sodium carbonate
Parts by weight, 15 parts by weight of succinic acid, 1 part by weight of polyethylene glycol 6000, a colorant, and trace amounts of fragrance were added, mixed uniformly, and then tableted to obtain tablets each weighing 80 g. This tablet was packaged in an aluminum bag and used as a bath additive. Example 4 After uniformly mixing the mixture according to the formulation of Example 3, it was granulated using a dry granulator to obtain granular bath salts each weighing 80 g. Comparative Example 7 (Difference in fine powder) Instead of 10 parts by weight of acrylic resin in Example 2, 24 parts by weight of acrylic resin
A bath additive was obtained in the same manner except that 10 parts by weight of titanium oxide having a sedimentation amount of 95% after hours, an average particle size of 0.3 microns, and a maximum particle size of 1 micron or less was used. Test Example 2 The bath salts of Example 2 and Comparative Example 7 were tested in the same manner as Test Example 1. This result is the second
As shown in the table.

【table】

Claims (1)

[Scope of Claims] 1 (a) carbon dioxide or a carbon dioxide gas generator, (b) an oily component, (c) a dispersant or emulsifier for the oily component, and (d)
Fine powder with a particle size of 3 microns or less that is substantially insoluble in water and has a sedimentation ratio of 50% by weight or less after 24 hours in water;
A weakly acidic bath additive characterized by containing. 2. The weakly acidic bath additive according to claim 1, wherein the carbon dioxide gas generating substance is composed of a carbonate and an acid. 3. A patent in which the acid is one or more acids selected from the group of acids and fumaric acids represented by the formula HOOC-(CH ₂ ) _o -COOH (in the formula, n represents an integer from 2 to 4) A weakly acidic bath additive according to claim 2. 4. The weakly acidic bath additive according to claim 1, wherein carbon dioxide gas is retained by zeolite or cyclodextrin.