JP2003002822A - Bath agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a bath agent which is stable, does not give stimulation to the skin and increasingly improves the durability of moisture-keeping effect on the skin. SOLUTION: This bath agent is composed of (a) an oil component, (b) an extract of a substance obtained by fermentation of one or more substances selected from the group consisting of rice, rice bran, white rice bran and polished white rice and (c) an emulsifier, and at least 50 wt.% of the oil component (a) consists of rice bran oil and/or ricegerm oil.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a bath agent. More specifically, the present invention relates to a bathing agent in which hot water becomes an emulsion when placed in hot water.

[0002]

2. Description of the Related Art There are many bathing agents containing an emulsifying agent in order to give a visual effect like a hot spring. As a liquid type containing an O / W emulsion as an emulsion component, for example, JP-A-11-189526 discloses an emulsion of liquid paraffin. However, since liquid paraffin is derived from minerals, problems such as skin irritation and persistence of effects have been pointed out.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a bath salt which is stable, has no irritation to the skin, and has dramatically improved durability of its moisturizing effect. .

[0004]

Means for Solving the Problems As a result of intensive studies for achieving the above-mentioned object, the present inventors have found that a specific oily component and a specific extract have no irritation and have a long-lasting moisturizing effect. Has reached the present invention.

That is, the present invention relates to an oil component (a), rice,
An extract (b) obtained by fermenting one or more kinds selected from rice bran, rice bran and polished rice, and an emulsifier (c),
50% by weight or more of (a) is rice bran oil and / or rice germ oil (a1), a bath salt (first invention); and rice bran oil and / or rice germ oil (a)
1), an extract (b) obtained by fermenting one or more kinds selected from rice, rice bran, rice bran and polished rice, and an emulsifier (c1) having an emulsifying power index s of 8 or more (a bath agent ( Second invention).

The oily component (a) in the first invention is for emulsifying the hot water when the bathing agent is added to the hot water, and is 50% by weight or more, preferably 80% by weight of the oily component.
The above consists of rice bran oil and / or rice germ oil (a1). When (a1) is less than 50% by weight, the moisturizing effect on the skin and the smooth feel are poor.

[0007] (a1) is an oil and fat obtained from rice bran or rice germ, and is usually extracted from rice bran or rice germ. For example, in the case of rice bran oil, after being heat-treated, it is extracted with a solvent such as hexane, and produced through processes such as solvent removal, refining, and deodorization. As its components, tocopherol, tocotrierol, sterol,
It contains squalene, ferulic acid, γ-oryzanol, phytin, inositol and the like. In particular,
"Tsu no Mark rice bran oil" and "Kome brand rice germ oil" (manufactured by Tsuno Rice Fine Chemicals Co., Ltd.); "Oryza rice bran oil", "Oriza oil S-1" and "Oriza brown rice germ oil" (manufactured by Oriza Yuka); "Rice white squeezing oil" (manufactured by Tokyo Yushi Kogyo Co., Ltd.); "Boso rice oil", "Brown rice germ oil" and "Rice germ oil OZ" (manufactured by Bosso Yushi); Etc.

In addition to (a1), (a) may optionally contain other oily components. Other oily ingredients include oils and fats such as olive oil, soybean oil, coconut oil, camellia oil, castor oil; waxes such as carnauba wax, jojoba oil, beeswax, lanolin; liquid paraffin, paraffin, petrolatum, ceresin, microcristan wax. Hydrocarbons such as squalane; higher fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid; higher alcohols such as lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, isostearyl alcohol Kinds; isopropyl myristate, 2-octyldodecyl myristate, isopropyl palmitate, isopropyl adipate, butyl stearate, decyl oleate, and other esters. Hydrocarbons are preferably not contained or contained in a small amount (for example, 20% by weight or less, particularly 15% by weight or less).

[0009] (b) is usually obtained by saccharifying rice, rice bran, rice bran or milled rice with an enzyme, adding yeast etc. to this, squeezing the fermentation product obtained by fermentation and heating. It can be manufactured. These extracts are usually 1
It is a solution of 8-22% ethanol. As (b), it is possible to use as long as it is safe for the human body, but it is preferable that it conforms to the cosmetic raw material standard, the cosmetic compounding standard, the quasi drug standard, or the food additive standard. .

In the bath agent according to the present invention, (a1)
The weight ratio of / (b) is preferably 1/50 to 1/1, more preferably 2/50 to 0.9 / 1. (A1)
When the ratio is 1 or more with respect to (b) 50, the haze is good when used as a bathing agent. Also, (b)
If it is 1 or less with respect to 1, the effect of (b) is likely to be exhibited.

The bathing agent in the first invention is (a),
Although it is composed of (b) and an emulsifier (c), it may further contain a polyhydric alcohol (d) and / or water.

As (c), one or more kinds of surfactants selected from nonionic surfactants (n), anionic surfactants, cationic surfactants and amphoteric surfactants can be used.

Examples of the nonionic surfactant include the following.

(N1) polyoxyalkylene alkyl or alkenyl ether; an aliphatic saturated alcohol having 8 to 26 carbon atoms (linear or branched) or an aliphatic unsaturated alcohol having 2 to 4 carbon atoms (preferably 2 or 3). Alkylene oxide (hereinafter abbreviated as AO) adduct.

As the aliphatic alcohol having 8 to 26 carbon atoms which constitutes (n1), a natural or synthetic saturated or unsaturated linear and / or branched primary, secondary or tertiary alcohol can be used, and is preferred. Is a primary alcohol.

The natural alcohols include natural saturated alcohols (lauryl alcohol, myristyl alcohol, coconut oil reduced alcohol, stearyl alcohol, cetyl alcohol, tallow reduced alcohol, etc.), natural unsaturated alcohols (oleyl alcohol, etc.), and natural saturated and unsaturated alcohols. A mixture of alcohols (such as matcha alcohol and beef tallow partially reduced alcohol) can be mentioned. Among the synthetic alcohols, specific examples of the aliphatic saturated primary alcohol include:
Ziegler alcohols such as decyl alcohol, lauryl alcohol, and stearyl alcohol, for example, trade name ALFOL 1214 (manufactured by CONDEA) and the like, oxo alcohol [for example, trade name dovanol 23, 25,
45 (manufactured by Mitsubishi Chemical), tridecanol (manufactured by Kyowa Hakko),
2-ethylhexanol (manufactured by Mitsubishi Chemical), Oxochol 1213, 1215, 1415 (manufactured by Nissan Chemical), Diadol 115-L, 115H, 135 (manufactured by Mitsubishi Chemical),
Calcall 0898, 2098, 2450, 8098
(Manufactured by Kao)], etc., and examples of the aliphatic saturated secondary alcohol are those obtained by an oxidation method using n-paraffin as a raw material, and described in Oil Chemistry Vol. 21, No. 5, pp. 233-242 (1972). What has been done is mentioned.

As AO constituting (n1), ethylene oxide (hereinafter abbreviated as EO), 1,2-propylene oxide (hereinafter abbreviated as PO), 1,2-, 2,3-,
Examples thereof include 1,3- and 1,4-butylene oxide and a combination of two or more kinds thereof, preferably EO alone and a combination of EO and PO. When used in combination, either block addition or random addition may be used, but block addition is preferred.

From the viewpoint of storage stability of a bathing agent containing ethanol or sodium chloride at a high temperature (for example, 50 to 60 ° C., the same applies below), the number of moles of EO added in (n1) is 15 to 40.
The number of moles of PO added is preferably 0 to 15, more preferably 5 to 10 moles.

Specific examples of polyoxyalkylene alkyl ethers include polyoxyethylene polyoxypropylene 2-decyl tetradecyl ether (block adduct of 2-decyl tetradecyl alcohol PO and EO),
Polyoxyethylene polyoxypropylene stearyl ether, polyoxyethylene polyoxypropylene cetyl ether, polyoxyethylene polyoxypropylene lauryl ether, polyoxyethylene polyoxypropylene octyl ether, polyoxyethylene polyoxypropylene 2-octyldodecyl ether, etc. Oxyethylene polyoxypropylene alkyl ethers; and polyoxyethylene alkyl ethers such as polyoxyethylene lauryl ether and polyoxyethylene cetyl ether. Specific examples of polyoxyalkylene alkenyl ethers include polyoxyethylene polyoxypropylene oleyl ether and polyoxyethylene oleyl ether. Among these, preferred is polyoxyalkylene alkyl ether, more preferred is polyoxyethylene polyoxypropylene alkyl ether, and particularly preferred is polyoxyethylene polyoxypropylene 2-decyl tetradecyl ether.

(N2) polyoxyalkylene (alkyl) phenyl ether; AO adducts of phenol or alkyl-substituted phenols (combinations of EO and PO) are included, and the number of carbon atoms in the alkyl group is usually 1 to 20. The degree of group substitution is 1 or 2. From the viewpoint of the storage stability of bath salts containing ethanol and salt at high temperatures, (n
The number of moles of AO added in 2) is preferably 15 to 40 moles.

Specific examples of (n2) include polyoxyethylene nonyl phenyl ether, polyoxyethylene octyl phenyl ether, polyoxyethylene polyoxypropylene nonyl phenyl ether, and other polyoxyethylene alkyl phenyl ethers.

(N3) Polyoxyalkylene fatty acid ester; polyoxyalkylene having an alkylene group having 2 to 4 carbon atoms, and 8 to 24 carbon atoms (preferably 12 to 2 carbon atoms).
2; saturated or unsaturated (including carbon of -COOH group) 1
Examples thereof include mono- or diesters of polyhydric fatty acids. The weight average molecular weight of the polyoxyalkylene moiety in (n3) is preferably 500 to 6,000, more preferably 1,000 to 4, from the viewpoint of the stability of the bath agent mixed with ethanol or salt at high temperatures. It is 000. 500
When it is above, almost no separation is observed in the compounding stability, and when it is 6,000 or less, 60 ° C.
However, separation is rarely seen.

Specific examples of (n3) include (n31) polyoxyalkylene saturated fatty acid ester:
Polyoxyethylene monolaurate, polyoxyethylene monopalmitate, polyoxyalkylene monosaturated fatty acid ester such as polyoxyethylene monostearate, and polyoxyethylene dilaurate, polyoxyethylene dipalmitate, poly Polyoxyalkylene disaturated fatty acid esters such as oxyethylene distearate and polyoxyethylene dibehenate, (n32) polyoxyalkylene unsaturated fatty acid esters: polyoxyethylene monooleate and polyoxyethylene monolinoleic acid Polyoxyalkylene monounsaturated fatty acid esters such as esters, and polyoxyethylene dioleic acid esters and polyoxyethylene diesters Examples thereof include polyoxyalkylene diunsaturated fatty acid esters such as linoleic acid esters.

The polyoxyalkylene fatty acid ester is
It is preferable to use two or more types in combination, and more preferably (n
31) and (n32) are used together. When used alone, both have poor long-term stability. (N31)
Among (n32), preferred are polyoxyalkylene disaturated and diunsaturated fatty acid esters, and more preferred are polyoxyethylene distearate and polyoxyethylene dioleate.

(N4) polyoxyalkylene polyhydric alcohol higher fatty acid ester; alkylene having 2 to 4 carbon atoms,
Those having 2 to 100 oxyalkylene groups, 2 to 10 polyvalent alcohol valences, and 8 to 24 fatty acid carbon atoms.
Specific examples thereof include polyoxyethylene monolaurate (additional mole number = 10) sorbitan, polyoxyethylene (additional mole number = 50) dioleic acid methyl glucoside, and the like.

(N5) fatty acid alkanolamides; fatty acids having 8 to 24 carbon atoms and having 1 or 2 hydroxyalkyl groups having 2 to 4 carbon atoms and their A
O adduct (addition mole number 1 to 30). As a specific example,
Examples thereof include 1: 1 type coconut oil fatty acid diethanolamide and 1: 1 type lauric acid diethanolamide.

(N6) Polyoxyalkylenealkylamines; those having 2 to 4 alkylene carbon atoms, 2 to 50 oxyalkylene groups, and 8 to 24 alkyl carbon atoms.
Specific examples include polyoxyethylene lauryl amine (additional mole number = 20), polyoxyethylene stearyl amine (additional mole number = 80), polyoxypropylene polyoxyethylene stearyl amine (total addition mole number = 30) and the like. can give.

(N7) amine oxide; alkyl or alkenyl (having 8 to 24 carbon atoms) dialkyl (having 1 carbon atom)
To 6) amine oxides and hydroxy-substituted products thereof. Specific examples thereof include lauryl dimethyl amine oxide, stearyl dimethyl amine oxide, oleyl dimethyl amine oxide, lauryl bis (2-hydroxyethyl) amine oxide, 2-hydroxydodecyl dimethyl amine oxide and the like.

Of these nonionic surfactants, (n1) to (n3), particularly (n1) and (n) are preferred.
3) and a combination of (n1) and (n3).

The HLB of the polyoxyethylene nonionic surfactant used in the present invention is preferably 7 to 19, more preferably 8 to 18. When two or more nonionic surfactants are used in combination, the HLB of each may be out of the range, but the HLB of the mixture is preferably 7 to 19. If the HLB is 7 or more, it is 50 ~
The stability at 60 ° C is improved and it becomes difficult to separate. Also, 1
When it is 9 or less, the stability is good when the bath agent is in an emulsion form. In the present invention, the HLB of the surfactant is calculated from the Griffin equation (for example,
Takehiko Fujimoto, "Introduction to New Surfactants," 127-132 (1992), published by Sanyo Kasei; Oda, Teramura,
"Synthesis of surfactants and their applications", 492, 493, 501
Page (1957), described in Maki Shoten). In the present invention, it is assumed that only the polyoxyethylene chain portion is a hydrophilic group and the other polyoxyalkylene chains such as polyoxypropylene chains are hydrophobic groups.

The anionic surfactant has 8 carbon atoms.
To 24 carboxylic acids having an alkyl group or salts thereof; for example, alkyl carboxylic acids (salts) [sodium laurate, triethanolamine laurate, sodium stearate, etc.], alkyl ether carboxylic acids (salts)
[Sodium lauryl ether acetate, (poly) oxyethylene (additional mole number 1 to 100) sodium lauryl ether acetate, etc.], acylated amino acid (salt) [sodium coconut oil fatty acid methyl taurine, sodium coconut oil fatty acid sarcosine sodium, coconut oil fatty acid Sarcosine triethanolamine, N-coconut oil fatty acid acyl-L-glutamic acid triethanolamine, N-coconut oil fatty acid acyl-L-glutamate sodium, lauroylmethyl-β-alanine sodium, etc.],

Sulfonic acids having 8 to 24 carbon atoms or salts thereof; for example, alkylbenzenesulfonic acid (salt) [sodium dodecylbenzenesulfonate, etc.], sulfosuccinic acid ester (salt) [disodium dioctylsulfosuccinate, di ( Poly) oxyethylene (number of added moles = 1 to 100) lauryl sulfosuccinic acid 2
Sodium], alkyl diphenyl ether sulfate (salt) [sodium dodecyl diphenyl ether disulfonate, etc.],

A sulfuric acid ester having an alkyl group having 8 to 24 carbon atoms or a salt thereof; for example, an alkyl sulfuric acid ester (salt) [sodium lauryl sulfate, etc.], an alkyl ether sulfuric acid ester (salt) [(poly) oxyethylene (additional mole) Number = 1 to 100) sodium lauryl sulfate, (poly) oxyethylene (additional mol number = 1 to 100) lauryl sulfate triethanolamine], alkyl amide ether sulfuric acid ester (salt) [(poly) oxyethylene (additional mol number = 1 to 100) coconut oil fatty acid monoethanolamide sodium sulfate, etc.], (poly) oxyalkylene (carbon number 2 to 8, addition mole number = 1 to 100) alkylphenyl ether sulfuric acid ester (salt) [(poly) oxyethylene ( Addition mol number = 1 to 100) Nonyl phenyl ether sulfate ester Moniumu, etc.],

Phosphoric acid ester having an alkyl group having 8 to 24 carbon atoms or a salt thereof; for example, alkyl phosphoric acid ester (salt) [sodium lauryl phosphate, etc.], and alkyl ether phosphoric acid ester (salt) [(poly)] Oxyethylene (additional mol number = 1 to 100) sodium lauryl ether phosphate, etc.],

As the cationic surfactant, quaternary ammonium salt type [stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, distearyldimethylammonium chloride, lanolin ethylsulfinate fatty acid aminopropylethyldimethylammonium, etc.],
Examples thereof include amine salt type [stearic acid diethylaminoethylamide lactate, dilaurylamine hydrochloride, oleylamine lactate, etc.]. As the amphoteric surfactant,
Betaine type amphoteric surfactant [coconut oil fatty acid amide propyl dimethylamino acetic acid betaine, lauryl dimethyl amino acetic acid betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethyl imidazolinium betaine, lauryl hydroxysulfobetaine, lauroyl amide ethyl hydroxy Ethyl carboxymethyl betaine hydroxypropyl sodium phosphate and the like], and amino acid type amphoteric surfactants [sodium β-laurylaminopropionate and the like].

Among the emulsifiers (c), nonionic surfactants are preferred.

Emulsifier (c1) in the second invention of the present invention
Is an emulsifier having an emulsifying power index s of 8 or more for rice bran oil, and s is measured by the following method.

Rice bran oil (viscosity 80 cps at 20 ° C., fatty acid composition: palmitic acid about 15%, oleic acid about 45%,
97 parts by weight of linoleic acid (about 35%, other about 5%) and 3 parts by weight of an emulsifier (active ingredient) were mixed, and 5 parts by weight of this was separately adjusted to 25 ° C. Add 100 parts by weight of ion-exchanged water to a graduated cylinder with a lid. Then move the measuring cylinder up and down 20
Shake and let stand at 25 ° C. The emulsified state after 60 minutes was observed, and the score evaluated by the criteria shown below was used as the emulsifying power index s.
And

10: A state where the whole is uniformly emulsified 9: The whole is milky white but a part of the oil layer is separated (less than 2 mm) 8: The whole is milky white but a part of the oil layer is separated (2 mm or more and less than 5 mm) 7: Whole is milky white but part of oil layer is separated (5 mm or more and less than 8 mm) 6: Whole is milky white but part of oil layer is separated (8 mm or more and less than 10 mm) 5: Whole is milky white but part of oil layer is separated ( 10 mm or more and less than 13 mm) 4: The oil layer is almost separated (13 mm or more), the oil layer is milky white,
Transparency at the bottom of the water layer 3: The oil layer is almost separated (13 mm or more), the oil layer is milky white,
Transparency in the lower half of the water layer 2: The oil layer is almost separated (13 mm or more), the oil layer is milky white,
The entire water layer is almost transparent 1: Completely separated, and the oil and water layers are almost transparent

The method of selecting an emulsifying agent having an emulsifying power index of 8 or more is not particularly limited, but the following method can be used, for example. 1. Only one type of emulsifier is used, and the above emulsifying power test is performed with various types of emulsifiers. 2. Fix the emulsifier with the best emulsifying power index to 80% and mix the other emulsifiers with 20% to conduct the emulsifying power test. In the case of nonionic surfactants, test with different emulsifiers before and after the HLB of the fixed emulsifier, and select the optimum HLB of the emulsifier to mix.
To decide. Further testing with an emulsifier near the optimum HLB will reduce the number of tests. 3. The best combination of emulsifiers in the emulsification test is used to change the quantity ratio to determine the optimum quantity ratio. If the 4.2 component is insufficient, a different emulsifier is further added, and a few tests are repeated to determine the emulsifier and its amount ratio.

Specific examples of the emulsifier (c1) include those which give an emulsifying power index of 8 or more among those mentioned above as examples of (c).

In the present invention, the polyhydric alcohol (d) optionally used is a dihydric alcohol (propylene glycol, dipropylene glycol, polypropylene glycol, ethylene glycol, polyoxyethylene glycol, 1,2-, 1, 3- and 1,4-butylene glycol, 2-ethylhexanediol, etc.,
And their AO adducts); trihydric alcohols (such as glycerin, trimethylolpropane, and these AO adducts); polyhydric alcohols having 4 to 8 or more valences (glucose, sucrose, sorbitol, pentaerythritol, etc.), And these AO adducts).
In the above AO adduct, the number of moles of AO added per hydroxyl group is preferably 10 mol or less, particularly 6 mol or less. (D)
You may use 2 or more types together. Of these, preferred ones are propylene glycol, dipropylene glycol and glycerin, and particularly preferred ones are economical,
It is propylene glycol from the viewpoint of handleability.

The bath agent of the first invention of the present invention is (a),
Although it can be produced by mixing (b) and (c), a preferred method is: (1): (a) and (c) are mixed in advance to form a transparent or opaque liquid, or (2): In this method, (a), (c), (d) and / or an emulsifier (A) consisting of water is produced in advance, and then (b) is added to (1) or (2) and mixed. .

The bath agent of the second invention of the present invention is (a1),
Although it can be produced by mixing (b) and (c1), the preferred method is (1) in advance, (a1) and (c1)
(2) a transparent or opaque liquid mixture of (1), (2) previously produced (a1), (c1), (d) and / or an emulsion (A) consisting of water, and (1) Alternatively, (b) is added to (2) and mixed.

The following method is exemplified as a method for producing the emulsion (A). (A) Phase inversion emulsification method: A method in which water is gradually added to a W / O emulsion prepared in advance to invert the phase into an O / W emulsion. (A) D phase emulsification method: transparent gel-like O / D obtained by dispersing an oil phase in a phase (D phase) consisting of an emulsifier and a polyhydric alcohol
A method of obtaining an emulsion and a method of diluting the continuous phase (Phase D) by further adding water. (C) Natural emulsification method: A method in which a mixture of an emulsifier and an oily component is gradually added to water while stirring to emulsify. Among these, the D phase emulsification method is preferable, and it is possible to most efficiently prepare an emulsion having a small particle size. Further, by using an emulsifying device such as a homomixer or a high-pressure homogenizer and setting the conditions of the device (pressure, rotational speed of stirring, etc.), the particle size can be reduced and the particle size distribution can be adjusted. Even if (b) is added to the emulsifying agent (A), the particle size distribution generated during the production of the emulsifying agent does not usually change.

(A) or (a) in the emulsion (A)
The ratio of 1), (c) or (c1), (d), and water is preferably (c), based on the total weight of (A).
Alternatively, the content of (c1) is 1 to 10% by weight, the total content of (a) or (a1) and (d) is 40 to 90% by weight, the content of water is 5 to 50% by weight, (a) or ( a
The weight ratio of 1) to (d) is 3/1 to 1/3, and more preferably 3/1 to 1/1. When the content of (c) or (c1) is 1% or more, the particle size of the emulsion becomes small, and the storage stability of the bathing agent containing ethanol or sodium chloride, which will be described later, at high temperatures becomes good. (A) or (a
When the sum of 1) and (d) is 40% or more, the turbidity is good when used as a bathing agent, and when it is 90% or less, the viscosity of the emulsion is low. Easy to handle. If the water content is 5% or more, the stability of the emulsion during mechanical emulsification is good, and if it is 50% or less, the turbidity is good when used as a bathing agent. When the weight ratio of (a) or (a1) to (d) is 1/3 or more, the particle size of the emulsion becomes small and the stability of the bath agent becomes good. If the ratio of (a) is 3/1 or less, (d) becomes difficult to separate.

In the bathing agent of the present invention, particles (a1) are included in the aqueous layer containing (b) [in the case of the first invention, the above oily components other than (a1) are usually included] are emulsified and dispersed. The emulsion has a median diameter on the volume basis of preferably 0.1 to 0.6 μm, more preferably 0.2 to 0.5 μm.
μm. This median diameter is measured by a laser diffraction method. When the median diameter is 0.1 μm or more, the transmittance becomes low and the haze performance becomes strong. On the other hand, when the median diameter is 0.6 μm or less, the storage stability of the bathing agent at high temperature (50 to 60 ° C.) is good and it is difficult to separate even if ethanol or salt is added. In the particle size distribution,
The content of particles of 0.5 μm or more is preferably 60% or less, more preferably 50% or less. When the proportion of particles having a particle size of 0.5 μm or more is 60% or less, the storage stability of the bathing agent at a high temperature (50 to 60 ° C.) is good and separation is difficult even if ethanol or salt is added. The content of particles of 1.0 μm or more is preferably 30% or less, more preferably 10%
It is the following. As long as the particles with a size of 1.0 μm or more are 30% or less, even if blended with ethanol or salt, the high temperature of the bathing agent (50
The storage stability at (~ 60 ° C) is good and it becomes difficult to separate.

The bathing agent of the present invention, when blending (b),
In addition to (b), the following components may be added.

(1); Ethanol; (2); Medicinal extract components other than (b), such as fennel, oyster, chamomile, cinnamon, safflower, peony, iris,
Medicinal extract extract obtained by extracting crude drug such as senkyu and carrot with ethanol, (3); Inorganic salts [eg salt, sodium bicarbonate,
Sodium carbonate, sodium borate, sodium sulfate,
Sodium sulfide, sodium sesquicarbonate, sodium nitrate, sodium thiosulfate, sodium polyphosphate, sodium phosphate, calcium carbonate, magnesium carbonate, potassium chloride, potassium sulfide, etc.], inorganic oxides [calcium oxide, magnesium oxide, etc.], Inorganic acids [eg boric acid, metasilicic acid and silicic acid anhydride], and organic acids [eg succinic acid, fumaric acid, malic acid,
Tartaric acid, citric acid, benzoic acid, etc.], (4) fragrances, pigments, preservatives, etc.

Of these components, preferred are ethanol and / or sodium chloride, more preferably 5 to 40% by weight of ethanol based on (b) [the ethanol in (b) is not included], and sodium chloride is It is a mixture of 0 to 20% by weight.

Further, the bath agent of the present invention can be further diluted with water. The content of water in the bath salt is preferably 90% by weight or less, particularly 5 to 90% by weight [including the emulsion and water contained in (b)].

The method of using the bathing agent of the present invention is not particularly limited, but usually 10 to 100 g of the bathing agent of the present invention is used with respect to 150 to 200 liters of hot water.

[0053]

The present invention will be further described with reference to the following examples, but the present invention is not limited thereto. In addition, for example, 2-decyl tetradecyl ether (PO) _{6 of} Example 1
(EO) _{3 0} is 2-decyl tetradecyl alcohol P
O represents 6 mol and EO represents 30 mol of the block adduct.

Example 1 2-decyl tetradecyl ether (PO) ₆ (EO) ₃₀ (HLB = 13.1) 10 was added to a stainless steel beaker.
Part, PEG2000 distearate (represents a distearate of polyoxyethylene glycol having a weight average molecular weight of 2000; the same applies hereinafter) (HLB = 1
5.6) 16 parts and PEG1000 dioleic acid ester (HLB = 12.8) 4 parts were charged, 200 parts of propylene glycol was further added, and the mixture was heated to 70 ° C. in a water bath to dissolve. 450 parts of rice bran oil was added with stirring. Then, water was added to make a total amount of 1000 parts and the mixture was stirred. This was emulsified with a high pressure homogenizer to obtain 1000 parts of O / W emulsion (emulsion). In another beaker made of stainless steel, 30 parts of the above emulsifying agent and 70 parts of fermented rice extract were uniformly mixed to prepare bath agent 1. In addition, H of the component (c)
LB was 14.4.

Example 2 PE instead of PEG2000 distearate
G4000 distearate (HLB = 17.
Bath additive 2 was produced in the same manner as in Example 1 except that 5) was used. The HLB of the component (c) was 15.4.

Example 3 Substituting 16 parts of PEG2000 distearate for PEG6000 distearate (HLB =
18.3) A bath salt 3 was produced in the same manner as in Example 1 except that 36 parts were used. The HLB of the component (c) was 16.8.

Example 4 Instead of PEG1000 dioleate, PEG
A bath salt 4 was produced in the same manner as in Example 2 except that 4000 dioleic acid ester (HLB = 17.5) was used. The HLB of the component (c) was 16.0.

Example 5 Bath agent 5 was prepared by uniformly mixing 50 parts of water and 20 parts of ethanol with 30 parts of bath agent 2.

Example 6 To 60 parts of water and 10 parts of salt were uniformly blended with 30 parts of bath agent 4, to prepare bath agent 6.

Example 7 A bath salt 7 was produced in the same manner as in Example 4 except that rice germ oil was used instead of rice bran oil.

Example 8 A bath salt 8 was produced in the same manner as in Example 1 except that 50 parts of liquid paraffin and 400 parts of rice bran oil were used instead of 450 parts of rice bran oil.

Example 9 A bath salt 9 was produced in the same manner as in Example 1 except that 50 parts of liquid paraffin, 130 parts of olive oil and 270 parts of rice bran oil were used instead of 450 parts of rice bran oil.

Comparative Example 1 Comparative bath salt 1 was produced in the same manner as in Example 1 except that liquid paraffin was used instead of 450 parts of rice bran oil.

Comparative Example 2 Comparative bath salt 2 was produced in the same manner as in Example 4 except that 180 parts of rice bran oil and 270 parts of liquid paraffin were used instead of 450 parts of rice bran oil.

Comparative Example 3 To 30 parts of the comparative bath agent 1, 50 parts of water and 20 parts of ethanol were uniformly mixed to prepare a comparative bath agent 3.

Table 1 shows the HLB of the emulsifier (c) used in the bath additives 1 to 8 and the comparative bath additives 1 to 3, the measured values of the particle size distribution of the bath additives, and the stability of these bath additives at high temperatures.
Shown in.

Measurement method of particle size distribution (median size and measurement of particle size distribution of 0.5 μm or more and 1.0 μm or more): Laser diffraction particle size measuring device (X-100 manufactured by Microtrac) was used. .

Stability evaluation method at high temperature (60 ° C. × 7 days, and 50 ° C. × 30 days); static storage under two conditions of 60 ° C. × 7 days and 50 ° C. × 30 days, visual inspection of appearance, And, the state after slight shaking such that the state of upside down once was returned was evaluated. The evaluation criteria are as follows. ◎: Uniform and no separation ○: Slightly separated, evenly shaken to be uniform Δ: Very separated, evenly shaken ×: Very separated, not evenly shaken

[0069]

[Table 1]

Table 2 shows the results of sensory evaluation of the bath agents of Examples 1 to 8 and Comparative Examples 1 to 3.

Actual sensory evaluation method: The actual sensory evaluation by 10 panelists was judged as follows. <Smoothness> Panelists 1 during 11 days of winter (every day average temperature 8-10 ° C, average humidity 40-55%)
0 people bathed each day with different bathing agents. Bath salt 5
0 g was put in a bathtub storing 200 L of hot water, bathed normally, and after wiping the body, the smooth feeling of the skin was sensory evaluated.
The evaluation criteria are as follows. 3 points: judged to have a very smooth feeling 2 points: judged to have a fairly smooth feeling 1 point: judged to have a slight smooth feeling 0 point: judged to have no smooth feeling (same as when no bath salt was used) ) <Moisturizing effect> The moist feeling of the skin was sensory evaluated 3 hours after the body was wiped as described above. 3 points: judged that the skin was very moist 2 points: judged that the skin was considerably moist 1 point: judged that the skin was slightly moist 0 point: judged that the skin was dry (bath salt Same as when not using)

[0072]

[Table 2]

[0073]

The bathing agent of the present invention is excellent in smoothness and moisturizing feeling during and after bathing, and is excellent in moisturizing and heat retaining effects. Further, even when ethanol or sodium chloride is added, it has excellent storage stability at a high temperature of 50 to 60 ° C. Further, the following effects are achieved. (1) It is liquid and easy to handle. (2) The water in the bathtub after use can be used for washing. (3) Skin irritation is lower than that derived from mineral oil.

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Claims (8)

[Claims] 1. An oily component (a), an extract (b) obtained by fermenting at least one selected from rice, rice bran, rice bran and polished rice, and an emulsifier (c), and 50% by weight of (a). A bath salt characterized in that the above is rice bran oil and / or rice germ oil (a1). 2. Rice bran oil and / or rice germ oil (a
1), an extract (b) obtained by fermenting one or more kinds selected from rice, rice bran, rice bran, and polished rice, and an emulsifier (c1) having an emulsifying power index s of 8 or more. 3. The weight ratio of (a1) / (b) is from 1/50 to
The bath salt according to claim 1 or 2, which is 1/1. 4. An emulsion in which particles containing (a1) are dispersed in an aqueous layer containing (b), and the median diameter of the emulsion is 0.1 to 0. It is 6 micrometers, the content rate of the particle | grains of 0.5 micrometer or more is 60% or less, and the content rate of the particle | grains of 1.0 micrometer or more is 30% or less, The claim | item 1 characterized by the above-mentioned. Bath additive. 5. An emulsion (A) comprising (a) or (a1), (c) or (c1) and a polyhydric alcohol (d) and / or water containing (b). The bath salt according to any one of 1 to 4. 6. The content of (c) or (c1) is 1 to 10% by weight based on the total weight of (A), and the total content of (a) or (a1) and (d) is 40 to 90. weight%,
The bath salt according to claim 5, wherein the water content is 5 to 50% by weight, and the weight ratio of (a) or (a1) to (d) is 3/1 to 1/3. 7. (c) or (c1) is selected from the group consisting of polyoxyalkylene alkyl or alkenyl ethers, polyoxyalkylene (alkyl) phenyl ethers and polyoxyalkylene fatty acid esters, and has an HLB of 7 to 19. The bath agent according to any one of claims 1 to 6, which comprises one or more kinds of surfactants. 8. The bath salt according to claim 1, further comprising salt.