JP2589257B2 - 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 granular and / or powdered bath composition comprising an oil component and a surfactant component encapsulated therein as bath components.

[0002]

2. Description of the Related Art Various types of bathing agents have been known as bathing agents, such as powdered bathing agents and liquid bathing agents. Further, as a bathing agent containing an encapsulated product, an oily component or a fragrance is compounded as an encapsulated product for the purpose of long-term stability of the content encapsulated in JP-A-3-287524 and JP-A-4-26616. Bath agents are disclosed. But,
Since the encapsulated product did not contain a surfactant component, the contents of these encapsulated products were suspended on the surface of the bath in bath water and could not be emulsified and dispersed in the bath water.

[0003] As described above, capsule particles which are encapsulated products containing an oil component are known, but seamless capsule particles containing a surfactant component are not known. The reason is that conventional seamless capsule particles containing an oil component such as a vegetable oil as a content and containing no surfactant component are produced by utilizing interfacial tension as disclosed in JP-B-36-3700. Therefore, if the inner solution contains a surfactant component having a high HLB, encapsulation is difficult because the interfacial tension between the content and the film is considerably reduced, and the joint containing the surfactant component as the content is difficult. It was difficult to produce capsule-free capsule particles.

[0004] Also, Japanese Patent Application Laid-Open No. 61-227519,
JP-A-1-238519 discloses a capsule particle containing a nonionic surfactant having a relatively high HLB. However, since these capsule particles are manufactured by filling with a capsule filling machine, there is a seam in the film, which is not only unfavorable in appearance, but also there is a concern that leakage of contents from the seam may occur, and the average film thickness may be reduced. There was a problem that the dissolution rates of the individual capsule particles differed due to the non-uniformity.

On the other hand, JP-B-53-39193 and JP-A-55-99177 disclose seamless capsule particles having a multilayer structure obtained by using multiple nozzles. There is no disclosure of capsule particles containing an active ingredient as a content. Also,
JP-A-3-52639 discloses a seamless capsule in which a lower fatty acid ester of sucrose having surface activity is interposed between a content, which is a hydrophilic substance, and a film. However, it does not disclose capsule particles containing a surfactant component and an oil component as contents.

[0006] By blending a surfactant-containing seamless encapsulated product encapsulating an oily component and a surfactant component as a bath agent component of a bathing agent, the emulsification and dispersion of the oily component in the bath water can be improved. Is expected,
In fact, bath compositions containing such surfactant-containing seamless encapsulations have not yet been found. Accordingly, an object of the present invention is to provide a bath agent composition containing a surfactant-containing seamless encapsulated product in which an oil component and a surfactant component are encapsulated as bath agent components in a bath agent base.

[0007]

Means for Solving the Problems The present inventors have intensively studied to solve the above-mentioned problems. As a result, by blending an encapsulated product consisting of seamless capsule particles containing an oily component and a surfactant component in a bath agent base,
It has been found that the content of the encapsulated product can be favorably emulsified and dispersed in bath water, and the present invention has been completed.

That is, the gist of the present invention is to contain a surfactant-containing seamless encapsulated product in which an oil component and a surfactant component are encapsulated as a bath component in a granular and / or powder bath base. The present invention relates to a bath composition. Here, it is preferable that the surfactant component in the surfactant-containing seamless encapsulated product is one or a mixture of two or more selected from nonionic surfactants. The HLB of the agent is 7-1
The case of 8 is preferred. Further, a preferable method for obtaining a seamless capsule containing a surfactant is a method using multiple nozzles having a sequentially increasing diameter, and it is preferable to use an encapsulate obtained by such a method.

The seamless encapsulated product containing a surfactant in the present invention is capsule particles comprising an inner layer and an outer layer (hereinafter, may be simply referred to as capsule particles).
The outer layer is a layer having a film-forming body, and the film-forming liquid used to form the film-forming body is a solution containing the film-forming body or a solution containing the film-forming body. The film-forming body is not particularly limited as long as it is a substance which is hardened or gelled by a physical means such as cooling or a chemical means such as a cross-linking reaction. Therefore, a natural, semi-synthetic or synthetic hydrophilic polymer having high affinity for water is preferably used.

Examples of such a hydrophilic polymer include glue, gelatin, collagen protein, casein,
Sodium alginate, carrageenan, furceleran, tamarind gum, pectin, gum arabic, guar gum, xanthan gum, tragacanth gum, locust bean gum, agar, starch and other natural hydrophilic polymers; carboxymethylcellulose, methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, phthalate acetate Semi-synthetic hydrophilic polymers such as cellulose acetate, propylene glycol alginate, oxidized starch, esterified starch, etherified starch, and cationic starch; and synthesis of sodium polyacrylate, polyethylene imine, polyvinyl alcohol, polyethylene oxide, polyvinyl pyrrolidone, etc. Examples include, but are not limited to, hydrophilic polymers. These hydrophilic polymers are used alone or in combination of two or more.

At this time, one or more of water-soluble polyhydric alcohols and derivatives thereof may be added together with the above-mentioned hydrophilic polymer. When a water-soluble polyhydric alcohol and its derivative are added, usually 5
To 100% by weight, preferably 10 to 80% by weight. Examples of the water-soluble polyhydric alcohol and its derivative to be added include glycerin, sorbitol, ethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, ethylene oxide-propylene oxide copolymer, oligosaccharides, glycerides and the like. However, the present invention is not particularly limited to these.

The inner layer is a layer containing an oil component and a surfactant component, and is composed of a single layer or two or more concentric layers. Each layer includes (1) a layer composed of an aqueous dispersion containing an oil component and a surfactant component, (2) a layer composed of an oil component and a surfactant component, (3) a layer of an oil component, and (4) It is formed by appropriately combining layers of a surfactant component and the like.

The surfactant used herein is selected from one or more of a nonionic surfactant, an anionic surfactant, a cationic surfactant, and an amphoteric surfactant. However, in the present invention, since the inner solution comes into contact with the skin in bath water after disintegration of the capsule particles, one selected from one or more nonionic surfactants having less skin irritation is preferred. Particularly preferred.

The nonionic surfactant is not particularly restricted but includes, for example, glycerin fatty acid ester, propylene glycol fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbit fatty acid ester and polyoxyethylene. Ethylene alkyl ether, polyoxypropylene alkyl ether, polyoxyethylene polyoxypropylene glycol, polyoxyethylene polyoxypropylene alkyl ether, polyethylene glycol fatty acid ester, polyoxyethylene castor oil,
Polyoxyethylene hydrogenated castor oil, polyglycerin fatty acid ester and the like can be mentioned.

The HLB of the nonionic surfactant used in the present invention is usually 7 to 18, preferably 7 to 18, so that the oily component of the contents can be well emulsified when the capsule particles disintegrate in bath water. 8 to 13 are preferred. When the HLB is less than 7, the emulsifying ability of the oily component is insufficient, and when the HLB is more than 18, encapsulation becomes difficult. When two or more nonionic surfactants are mixed, the HLB after mixing is used.
May be 7 to 18, and a nonionic surfactant having an HLB of less than 7 may be similarly mixed in order to adjust the HLB in the capsule particles. The capsule particles in the present invention are preferably manufactured by continuously discharging a liquid for forming each layer using a multi-nozzle as described later. The surfactant may be mixed with any of the liquids for the inner layer.

The anionic surfactant is not particularly restricted but includes, for example, sodium lauryl sulfate,
Triethanolamine lauryl sulfate, ammonium lauryl sulfate, sodium dodecylbenzenesulfonate,
Sodium stearate, semi-hardened beef fatty acid sodium,
Semi-hardened beef fatty acid potassium, potassium oleate, castor oil potassium, sodium alkylnaphthalene sulfonate,
Sodium dialkyl sulfosuccinate, sodium alkyl diphenyl ether disulfonate, diethanolamine alkyl phosphate, potassium alkyl phosphate, sodium polyoxyethylene alkyl ether sulfate, triethanolamine polyoxyethylene alkyl ether sulfate, sodium polyoxyethylene alkyl phenyl ether sulfate, etc. No.

The cationic surfactant is not particularly restricted but includes, for example, lauryltrimethylammonium chloride, stearyltrimethylammonium chloride, cetyltrimethylammonium chloride, distearyldimethylammonium chloride, alkylbenzyldimethylammonium chloride, stearylamine oleate. Ethate, stearylamine acetate, stearylamine hydrochloride and the like can be mentioned.

The amphoteric surfactant is not particularly restricted but includes, for example, betaine alkyldimethylaminoacetate, alkyldimethylamine oxide, alkylcarboxymethylhydroxyethylimidazolium betaine, lecithin, laurylaminopropionic acid, alkyldiaminoethyl Glycine and the like.

The amount of the surfactant used is not particularly limited, but is usually from 49: 1 to 1: 3, preferably from 1 to 1 by weight, based on the weight ratio of the total oil component and the surfactant in the capsule particles.
9: 1 to 1.5: 1. When the amount of the surfactant used is less than 49: 1 in weight ratio to the total oil component, when the internal solution comes into contact with water, the oil component separates to cause a phenomenon such as oil floating and a stable emulsion is obtained. 1: 3
If it is larger, encapsulation becomes difficult.

The oily component used in the present invention is not particularly limited. Examples thereof include oils and fats, waxes, hydrocarbons, higher fatty acids, higher alcohols, esters, essential oils, and silicone oils. One or more selected mixtures are preferred.

As fats and oils, for example, soybean oil, bran oil,
Jojoba oil, avocado oil, almond oil, olive oil, cocoa butter, sesame oil, persic oil, castor oil, coconut oil, mink oil, tallow, lard, and other natural fats and oils, or cured products obtained by hydrogenating these natural fats and oils Examples include oil and synthetic triglycerides such as myristic glyceride and 2-ethylhexanoic acid glyceride. Examples of the waxes include carnauba wax, whale wax, beeswax, and lanolin. Examples of the hydrocarbons include liquid paraffin,
Vaseline, paraffin microcrystalline wax,
Ceresin, squalane, pristane 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, isostearic acid and the like. Examples of higher alcohols include lauryl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, lanolin alcohol, cholesterol, 2-hexyldecanol, and the like. Examples of the esters include cetyl octoate, myristyl lactate, cetyl lactate, isopropyl myristate, myristyl myristate, isopropyl palmitate, isopropyl adipate, butyl stearate, decyl oleate, and the like. As essential oils, for example, mint oil, jasmine oil, show brain oil, hinoki oil, spruce oil, ryu oil, turpentine oil, cinnamon oil, helgamot oil, tangerine oil, show oil, pine oil, lavender oil, bay oil, Clove oil, hiba oil, rose oil, eucalyptus oil, lemon oil, peppermint oil, rose oil, sage oil, menthol, cineole, eugenol, citral, citronellal, borneol, linalool, geraniol, camphor, thymol, spiranthol, pinene, limonene, And terpel compounds. Examples of silicone oils include, but are not limited to, dimethylpolysiloxane and the like.

A preferred method for preparing capsule particles in the present invention is to use a multi-nozzle having at least three or more triple nozzles having a sequentially increasing diameter, and to form a film-forming liquid from the outermost nozzle of the multi-nozzle and an oily liquid from another nozzle. The liquid for the inner layer containing the component and the surfactant component is continuously discharged in a gas phase or a liquid phase to form a multilayer droplet, and then the film-forming liquid of the multilayer droplet is cured or gelled. To obtain a seamless encapsulated product containing a surfactant (Japanese Patent Application Nos. 4-17923 and 4-19).
No. 3327).

When a solution containing a film-forming body is used, the film-forming liquid used here is 0.1 to 80% by weight using the above-mentioned hydrophilic polymer as the film-forming body.
Is preferable, and more preferably a solution of 1 to 50% by weight. Although the solvent is not particularly limited, water is preferred.

Examples of the liquid for the inner layer include an aqueous dispersion containing an oil component and a surfactant component, a liquid containing an oil component and a surfactant component, and a liquid containing only an oil component and a surfactant component. Is used.

In order to prepare an aqueous dispersion containing an oil component and a surfactant component, the oil component is emulsified directly in water with a surfactant or dispersed in water in oil from a water-in-oil emulsion. It is obtained by emulsifying an oily component in water through phase inversion to a type emulsion.
Although the surfactant concentration in the aqueous dispersion is not particularly limited, it is usually 10 to 10 with respect to the oil component in the aqueous dispersion.
It is 300% by weight, preferably 50 to 250% by weight.
If the surfactant concentration is less than 10% by weight, the oily components of the contents are not emulsified when the capsules disintegrate in bath water, and
If the amount is more than 00% by weight, the viscosity of the aqueous dispersion increases, and the success rate of capsule particle generation at the time of capsule particle generation is undesirably reduced. The concentration of the oily component in the aqueous dispersion is not particularly limited, but is usually 2 to 150% by weight, preferably 5 to 130% by weight based on water. When the concentration of the oil component is more than 150% by weight, the viscosity of the aqueous dispersion increases, and the formability of the capsule particles at the time of forming the capsule particles is reduced. Thus, when the concentration is less than 2% by weight, a uniform aqueous dispersion cannot be obtained. Therefore, it is not preferable.

In preparing a liquid comprising an oily component and a surfactant component, the concentration of the oily component is not particularly limited, but is preferably 0.01 to 300 parts by weight based on the surfactant component.
%, Preferably 0.1 to 200% by weight. If the oil component is less than 0.01% by weight, the effect of addition of a change in viscosity or the like is small, and if it is more than 300% by weight, when the internal solution comes into contact with water, the oil component separates to cause a phenomenon such as oil floating, It is not preferable because a stable emulsion is not obtained.

In order to harden or gel the film-forming liquid of the obtained multilayer droplets, the film-forming liquid is hardened or gelled by physical or chemical means to obtain surfactant-containing seamless capsule particles. Is generated. Here, physical methods include, for example, a method in which a film-forming liquid is brought into contact with a cooled hardener to cool the film-forming liquid, and curing is performed, and chemical methods include a gel formed by a chemical reaction between the film-forming liquid and the hardening agent. And the like.

The hardening agent is not particularly limited as long as it hardens or gels the film-forming liquid by physical or chemical means. A substance having substantially no solubility in the film-forming body obtained by the above method is appropriately used. For example, one or a mixture of two or more oils selected from fats and oils, waxes, hydrocarbons, higher fatty acids, higher alcohols, esters, essential oils, and silicone oils are used. The cooling temperature is not particularly limited as long as the film-forming liquid is cured.

When the film-forming liquid is chemically gelled, for example, sodium alginate is a solution containing calcium chloride and calcium phosphate, and polyvinyl alcohol is an aqueous solution containing borax, formalin and hydrochloric acid.
As gelatin, an aqueous solution containing calcium chloride and zirconium nitrate is appropriately selected, and gelation occurs due to a reaction such as crosslinking between the film forming liquid and these hardeners.

Further, as the capsule particles in the present invention, those having a single inner layer may be used. In order to form such a single layer, the inner layer obtained as described above is dried by drying the capsule particles having a concentric layer structure of two or more layers, so that each of the inner layers becomes a single layer. be able to. The water concentration in the capsule particles in the present invention is usually 25% by weight or less, preferably 20% by weight or less,
More preferably, it is 15% by weight or less. If it exceeds 25% by weight, the adhesiveness of the particle surface is so high that it is not preferable when used as dry particles.

The average film thickness t of the capsule particles according to the present invention thus obtained can be determined by the following equation.

[0032]

(Equation 1)

T: average coating thickness [cm] D: capsule particle average particle diameter [cm] D ₁ : capsule particle average inner layer diameter [cm] V ₁ : capsule particle inner layer volume [cm ³ ] = W ₁ / ρ ₁ =
Q ₁ / IV ₂ : Capsule particle coating volume [cm ³ ] = W ₂ / ρ ₂ =
Q ₂ / I W ₁ : Capsule particle inner layer weight [g] W ₂ : Capsule particle coating weight [g] Q ₁ : Total flow rate of inner layer liquid from nozzle [cm ³ / min] Q ₂ : For film formation from nozzle Total flow of liquid [cm ³ /
min] ρ ₁ : Average density of inner layer liquid [g / cm ³ ] ρ ₂ : Density of film forming liquid [g / cm ³ ] I: Number of capsule particles generated [pcs / min]

The average particle size D of the capsule particles in the present invention is not particularly limited, but is 0.2 mm to 2c.
m is preferred. However, the average particle diameter D is shown by weight average. The average coating thickness of the capsule particles is not particularly limited, but is usually 0.01 mm.
~ 5mm, preferably 0.03mm ~ 1m
m. If it is larger than 5 mm, a long dissolution time is required when dissolving the capsule to release the contents, and if it is 0.01 mm or less, the film-forming body is easily disintegrated when capsule particles are formed, and the success rate of capsule formation is significantly reduced. Is not preferred. The average film thickness here is
It is measured by a known measurement technique, for example, a micrometer or the like.

The raw material of the granular and / or powdered bath base used in the bath composition of the present invention varies depending on the intended effect of the bath composition, but it is usually used. One or two selected from inorganic salts, inorganic acids, organic acids, crude drugs, pigments, vitamins, fragrances, etc.
At least one kind of component may be appropriately selected and used in combination. Specific examples of these raw materials are as follows.

(A) Inorganic Salts Sodium chloride, sodium hydrogen carbonate, sodium carbonate, borax, sodium sulfate, sodium sulfide, sodium sesquicarbonate, sodium nitrate, sodium thiosulfate, sodium polyphosphate, sodium phosphate, calcium oxide, oxidation Magnesium, calcium carbonate, magnesium carbonate, potassium chloride, potassium sulfide, aluminum sulfate, alum, etc.

(A) Inorganic acids Boric acid, metasilicic acid, silicic anhydride, etc. (U) Organic acids Succinic acid, fumaric acid, malic acid, tartaric acid, citric acid, benzoic acid, etc. (D) Crude medicines Fennel, oak, chamomile , Cinnamon, safflower, peony,
Ginger, iris, senkyu, cypress, cock, chimpanzee, cypress, cypress, calf, light load, bukuro, ginseng, etc.

(E) Dyes Dyes specified in the Ministry of Health and Welfare ordinances I and II, such as Yellow No. 4, Blue No. 1, and Yellow No. 202 (1), chlorophyll, riboflavin, crocin, safflower, anthraquinone, etc. (F) Vitamins Vitamin A, Vitamin C, Vitamin D, Vitamin E, etc. (G) Flavors (C) Others Sulfur, hot water, mineral sand, mica powder, neutral White clay, rice bran, fungicides, preservatives, and other ingredients required for formulation

The bath agent composition of the present invention comprises the above-mentioned oily component and surfactant component as a bath agent component in a granular and / or powdery bath agent base obtained from the above-mentioned raw materials. Can be prepared by blending a surfactant-containing seamless encapsulated product encapsulating the compound. The amount of the encapsulated product in the present invention is usually 0.1 to 99%,
Preferably it is 0.5 to 80%. The composition of the present invention preferably contains 99.9 to 1%, particularly preferably 99.5 to 20%, of the inorganic salt.

[0040]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, which should not be construed as limiting the present invention.

Manufacture of encapsulated product Manufacture example 1 A triple nozzle having a sequentially increasing diameter [inner nozzle diameter 0.9 mm, intermediate nozzle diameter 2 mm, outermost nozzle diameter 3.5]
mm], 6% by weight of tri (caprylic capric acid) glycerin (manufactured by Coconado Kao Corporation) and 12.6% by weight of polyoxyethylene (average number of moles added: 20) sorbitan trioleate [HLB : 1
1], 1.4% by weight of sorbitan sesquioleate [HL
B: 3.7] (average HLB: 10.3), and 80% by weight of water was added thereto, and the resulting aqueous dispersion was flown through the innermost nozzle at a flow rate of 3.7 g / min. Tri (caprylic capric acid) glycerin was flowed from the intermediate nozzle at a flow rate of 4.4 g / min.
An aqueous solution of 70% by weight of glycerin, 4% by weight of glycerin and 66% by weight of water is discharged simultaneously into the gas phase at a flow rate of 3.5 [g / min] at a flow rate of 3.5 [g / min] to form multilayer droplets and cooled to 2 ° C. By dropping into the liquid paraffin thus obtained, capsule particles having a weight ratio of the surfactant to the oil component of 1: 9 in the particles were obtained. The inner layer of the capsule particles comprises two concentric layers,
The innermost layer was an aqueous dispersion containing an oily component and a surfactant component, the intermediate layer was an oily component, and was a surfactant-containing seamless capsule particle having a film-forming body in the outermost layer. When the particle diameter D of the capsule particles was measured with a vernier caliper, the average particle diameter was 5.1 mm, and the variation coefficient of the particle diameter distribution was 6.3%. The average coating thickness t was 0.74 mm when measured with a micrometer.

The seamless capsule particles containing the surfactant were cooled in liquid paraffin in a refrigerator for 12 hours (4
° C), and then dried at 21 ° C under a humidity of 60% for 12 hours. When the weight ratio of the amount of the surfactant in the particles to the oil component is 1:
9 capsule particles were obtained. The inner layer of the capsule particles was a single layer, and the inner layer was substantially composed of an oil component and a surfactant component, and was a seamless surfactant-containing capsule particle having a film-forming body outside thereof. When the particle diameter D of the capsule particles was measured with a vernier caliper, the average particle diameter was 4.2 m.
m, and the coefficient of variation of the particle size distribution was 6.6%.
When the film ratio (film weight / capsule particle weight) was measured, it was 20.0%. The average coating thickness t was 0.11 mm when measured with a micrometer. The water content in the capsule particles was 3.5% by weight.

Comparative Production Example 1 Using an apparatus having a double nozzle (inner nozzle diameter 0.7 mm, outer nozzle diameter 1.5 mm) having a sequentially increasing diameter, tri (caprylic capric acid) was injected from the inner nozzle.
6. Flow rate of glycerin [Coconard MT Kao Co., Ltd.]
5 [g / min], and gelatin 3
70% of 0% by weight, 4% by weight of glycerin and 66% by weight of water
The oily component is contained by discharging the aqueous solution kept at a flow rate of 5.0 [g / min] into the gas phase at the same time to generate two-layer droplets and dropping them into liquid paraffin cooled to 2 ° C. However, capsule particles containing no surfactant were obtained.

When the particle size D of the capsule particles was measured with a vernier caliper, the average particle size was 4.8 mm, and the variation coefficient of the particle size distribution was 6.2%. Average film thickness t
Was 0.73 mm when measured with a micrometer. The capsule particles were cooled (4 ° C.) for 12 hours in liquid paraffin in a refrigerator, and then cooled at 21 ° C. and 60% humidity.
% For 12 hours to obtain capsule particles. When the particle diameter D of the capsule particles was measured with a vernier caliper, the average particle diameter was 4.2 mm, and the variation coefficient of the particle diameter distribution was 6.
5%. Film ratio (film weight / capsule particle weight)
Was 20.0%. The average coating thickness t was 0.11 m when measured with a micrometer.
m. The water content in the capsule particles was 3.5% by weight.

Examples 1 and 2 and Comparative Examples 1 to 4 For Examples 2 and Comparative Examples 2 and 4, powders blended according to the formulation shown in Table 1 were heated to 60 ° C. and then extruded using a granulator. Then, the particles having a particle diameter of 355 μm or more and 1400 μm or less were selected by a sieve to prepare a granular bath base. In Example 1 and Comparative Examples 1 and 3, powders blended according to the formulations shown in Table 1 were used as they were as bath bases. Furthermore, in Examples 1 and 2, the capsule particles prepared in Production Example 1 were blended with these bath agent bases, and in Comparative Examples 1 to 4, the capsule particles prepared in Comparative Production Example 1 were blended with these bath agent bases, Each was mixed to obtain a bath agent composition. Using the obtained bath agent composition, solubility in hot water and emulsification dispersibility were examined by the test methods described below. Table 1 shows the results.
Shown in

Examples 3-4, Comparative Examples 5-8 In Examples 4 and Comparative Examples 6 and 8, powders blended according to the formulation shown in Table 2 were heated to 60 ° C. and then extruded using a granulator. Then, the particles having a particle diameter of 355 μm or more and 1400 μm or less were selected by a sieve to prepare a granular bath base. In Example 3 and Comparative Examples 5 and 7, powders blended according to the formulations shown in Table 2 were used as they were as bath bases. Furthermore, in Examples 3 and 4, the capsule particles prepared in Production Example 1 were blended with these bath agent bases, and in Comparative Examples 5 to 8, the capsule particles prepared in Comparative Production Example 1 were blended with these bath agent bases. Each was mixed to obtain a bath agent composition. Using the resulting bath agent composition, the solubility in hot water and the emulsifying dispersibility were examined in the same manner as in Example 1. The results are shown in Table 2.

(1) Solubility The compositions shown in Tables 1 and 2 were used in the amounts shown in the respective tables (30
g) The solution was poured into 150 liters of hot water (40 ° C.), stirred 10 times with a stirring rod, and the dissolved state was visually determined according to the following criteria. 5; no insolubles were observed. 4: Insoluble matter is slightly observed. 3: Some insolubles are observed. 2: Insolubles are considerably observed. 1: Insolubles are remarkably observed.

(2) Emulsifying and dispersing properties The compositions shown in Tables 1 and 2 were used in amounts shown in the respective tables (30
g) The mixture was poured into 150 liters of hot water (40 ° C.) and stirred 10 times with a stirring rod, and then the emulsified state was visually determined according to the following criteria. 5; No oil floating is observed. 4: Oil floating is slightly observed. 3: Oil floating is slightly observed. 2: Oil floating is recognized considerably. 1: Oil floating is remarkably observed.

[0049]

[Table 1]

[0050]

[Table 2]

As shown in the judgment results in Tables 1 and 2, the compositions of the present invention of Examples 1 to 4 were excellent in both solubility and emulsification dispersibility. On the other hand, in Comparative Examples 1 to 8 in which capsule particles containing no surfactant were blended, oil floating was particularly noticeable, and the result was poor emulsifying dispersibility.

[0052]

According to the present invention, since there is no need to shape the oil component in the powder component, there is provided a bath agent composition containing a large amount of an oil component effective on the skin and the like. Can be. Further, since the surfactant component is contained in the encapsulated product, the oil component can be favorably emulsified and dispersed, which is useful.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Jun Shida 20-21 Nakajima, Iwate-cho, Naga-gun, Wakayama Prefecture 155754 (JP, A) JP-A-4-26616 (JP, A) JP-A-3-287524 (JP, A) JP-A-1-238519 (JP, A) JP-A-61-176520 (JP, A) JP-A-60-16915 (JP, A) JP-A-50-92276 (JP, A) JP-A-49-115083 (JP, A) JP-A-55-99177 (JP, A) JP-A-3-52639 (JP, A)

Claims (4)

(57) [Claims] 1. A bath characterized in that a granular and / or powdery bath base contains a surfactant-containing seamless encapsulated product in which an oil component and a surfactant component are encapsulated as bath components. Composition. 2. The bath agent composition according to claim 1, wherein the surfactant component in the surfactant-containing seamless encapsulated product is one or a mixture of two or more selected from nonionic surfactants. 3. The HLB of the nonionic surfactant is from 7 to 7.
The bath composition according to claim 1, wherein the composition is 18. 4. The seamless encapsulant containing a surfactant is obtained by using a multi-nozzle having at least three or more nozzles having a sequentially increasing diameter, by using a film-forming liquid from an outermost nozzle of the multi-nozzle and an oil-based liquid from another nozzle. The liquid for the inner layer containing the component and the surfactant component is continuously discharged in a gas phase or a liquid phase to form a multilayer droplet, and then the film-forming liquid of the multilayer droplet is cured or gelled. The bath agent composition according to claim 1, 2 or 3, which is obtained by conversion into a bath.