JP2008162923A - Method for producing bathing agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a bathing agent having excellent sustainability of perfume and maintaining the intensity of the perfume in a preferable level. <P>SOLUTION: The method for producing the bathing agent includes the following steps (I) and (II): step (I): a step for mixing at least one kind of a nonionic surfactant of ≥0.1 pt.mass and ≤10 pts.mass with the perfume component of 100 pts.mass; and step (II): a step for preparing the bathing agent from the composition obtained at the step (I) and an additive for the bathing agent. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for producing a bath agent.

In bathing agent, fragrance is blended for the purpose of calming bathing or making the mood fun, but since the fragrance ingredient is highly volatile, it will be volatilized as soon as it is put in bath water, It was not easy to maintain the scent.
For this reason, in order to maintain the fragrance, the fragrance is microencapsulated with a water-soluble polymer, and the capsule wall is gradually dissolved and disintegrated in water to gradually release the fragrance. A method for delaying volatilization has been studied (for example, Patent Document 1). Moreover, the bath agent which mix | blends a fragrance | flavor precursor and the enzyme which decomposes | disassembles it and maintains a fragrance is also proposed (patent document 2). Furthermore, as a fragrance precursor substance, a bath agent that maintains a scent by using specific betaine esters has been proposed (Patent Document 3).
However, none of these methods has yet been sufficient in terms of scent persistence, and there are problems such as the need for an expensive base and a large limitation on applicable fragrance types.

Japanese Patent Publication No. 50-63126 JP-A-8-188529 JP 2001-139455 A

  The subject of this invention is providing the manufacturing method of the bath agent excellent in the persistence of fragrance which maintained the intensity | strength of the fragrance of the preferable level.

As a result of intensive studies in order to solve the above problems, the present invention has been achieved by preparing a bath agent based on the step of mixing a perfume and a small amount of a nonionic surfactant at a specific ratio. That is, the present invention
(1) A method for producing a bath preparation having the following steps (I) and (II):
Step (I): A step of mixing a perfume component and at least one nonionic surfactant having a content of 0.1 to 10 parts by mass with respect to 100 parts by mass of the perfume component Step (II ): A step of preparing a bath agent from the composition obtained in step (I) and an additive for bath agent (2) a bath agent obtained by the production method according to (1) above,
(3) A fragrance composition for bathing agents containing a fragrance component and at least one nonionic surfactant in an amount of 0.1 parts by weight or more and 10 parts by weight or less based on 100 parts by weight of the fragrance component;
(4) A bath agent containing the fragrance composition for bath agents described in (3) above, and (5) a bath agent in water that dissolves the bath agent described in (2) or (4) above in water. To improve the fragrance persistence of
About.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the bath agent excellent in the persistence of fragrance can be provided, maintaining the intensity | strength of a preferable fragrance.

(Method for producing bath salt)
This invention is a manufacturing method of the bath agent which has the following process (I) and (II).
Step (I): A step of mixing a perfume component and at least one nonionic surfactant having a content of 0.1 to 10 parts by mass with respect to 100 parts by mass of the perfume component Step (II ): A step of preparing a bath agent from the composition obtained in step (I) and an additive for bath agent

  The method for producing the bathing agent of the present invention is not particularly limited as long as the aforementioned steps are taken into account. As the step (I), any method can be adopted as long as it mixes a fragrance component described later and at least one nonionic surfactant described later in a specific ratio, but the effect of the present invention. From the viewpoint of expression, that is, from the viewpoint that the nonionic surfactant contributes to the sustainability of the fragrance component, in the present invention, in order to enhance the interaction with the fragrance, the fragrance component and at least one nonionic surfactant are used. Are preferably in a compatible state. Examples of such a method include the following methods.

  That is, (1) a method in which a fragrance component and at least one nonionic surfactant are previously mixed, and then a fragrance composition is obtained together with other components, and (2) the fragrance component and at least one nonion And a method of obtaining a fragrance composition under the condition that the fragrance component and at least one nonionic surfactant are compatible with each other. From the viewpoint of a method in which the effect of dissolution is maximized, the method described in (1) above, in which a fragrance composition is obtained by previously dissolving a fragrance component with a nonionic surfactant, is preferable. Here, the term “compatible” means that they are mixed with each other by means of heating, mixing, or the like to form one liquid, and there is no problem even if the fragrance composition made into one liquid is a room temperature solid.

As the step (II), the bath fragrance composition obtained in the step (I) and the general bath additive described later can be produced by a usual method, and the liquid, jelly, powder , Various dosage forms such as granules, capsules, tablets and the like.
When it is set as a liquid bath agent, it is preferable to adjust to pH 2-7, especially pH 4-6.5 from a viewpoint of relieving irritation | stimulation to skin. The pH is adjusted by a conventional method, for example, organic acids such as gluconic acid, lactic acid, tartaric acid, citric acid, fumaric acid, maleic acid, succinic acid, adipic acid, malic acid, ascorbic acid, gluconic acid lactone, acetic acid; hydrochloric acid, An inorganic acid such as phosphoric acid may be used.

As the bath preparation, powders, granules, capsules, tablets, and effervescent tablets are preferable from the viewpoint of simplicity. Among these, the use of a bathing agent as a carbon dioxide effervescent tablet provides a synergistic effect with the effect of the present invention because an excellent blood circulation promoting effect is obtained, which is a particularly preferred embodiment. Carbon dioxide gas effervescent tablets generate carbon dioxide gas when a bath agent is added to bath water, and a combination of an acid and a carbonate is preferable.
As the acid, any of organic acids and inorganic acids can be used, but those which are water-soluble and solid are preferable, and among these, from the viewpoint of availability and economy, for example, succinic acid, fumaric acid, malic acid, Particularly preferred are organic acids such as adipic acid, tartaric acid, benzoic acid, citric acid, pyrrolidone carboxylic acid and salicylic acid. Examples of the inorganic acid include boric acid, metasilicic acid, and silicic anhydride. Further, as the carbonate, sodium carbonate, sodium hydrogen carbonate, magnesium carbonate, potassium carbonate and the like are preferable from the viewpoint of availability and economy. These acids and carbonates can be used alone or in combination of two or more.

In the case of using an effervescent tablet bath, the amount of acid and carbonate is not particularly limited. However, taking into account the fact that the generated carbon dioxide gas is distributed into the bath water, the proportion of the acid and carbonate is appropriately selected. If the pH of the hot water is 5 to 7, the carbon dioxide gas in the bath water can be dissolved and an excellent blood circulation promoting effect can be obtained. The content of the acid is more preferably 10 to 80% by weight, particularly preferably 15 to 50% by weight in the bath agent. Further, the more preferable carbonate content is 5 to 80% by weight, particularly preferably 10 to 50% by weight in the bath agent.
In the case of effervescent tablets, there is a risk of reaction initiation due to moisture absorption or the like. Therefore, it is convenient in handling that the bathing agent of the present invention is sealed, for example, in an aluminum polyethylene-coated bag or a polyethylene container.
Based on the above steps, the effects of the present invention are exhibited. That is, it is possible to provide a method for producing a bathing agent having excellent fragrance sustainability while maintaining a desirable level of fragrance strength, and a fragrance composition for bathing agent and a bathing agent described below.

(Perfume composition for bathing agent)
The fragrance composition for bathing agents of the present invention contains a fragrance component and at least one nonionic surfactant in an amount of 0.1 to 10 parts by mass with respect to 100 parts by mass of the fragrance component. It is what is obtained by the process (I) in the manufacturing method of the said bath agent.
Fragrance component The type of the fragrance used in the present invention is not particularly limited. The effect of the present invention is remarkable in highly volatile fragrances from the viewpoint that the fragrance sustainability effect is easily obtained. As the highly volatile fragrance, terpene hydrocarbons, terpene esters, terpene alcohols, synthetic fragrances such as aldehydes and acetals, or natural essential oils and blended fragrances containing a large amount of these are desirable.

  Natural oils rich in terpene hydrocarbons, terpene esters, and terpene alcohols include lemon oil, grapefruit oil, lime oil, orange oil, bergamot oil, pine oil, camomil oil, jasmine oil, spearmint oil, peppermint oil, List of brackish oil, turpentine oil, lavender oil, rose oil, neroli oil, citronella oil, ginger oil, pepper oil, nutmeg oil, clove oil, coriander oil, dill oil, cumin oil, parsley oil, sage oil, thyme oil, etc. Can do.

  Synthetic fragrances include hydrocarbons such as limonene, α-pinene, β-pinene, camphene, terpinolene, myrcene, and ocimene. Alpines such as terpineol, linalool, geraniol, citronellol, l-menthol, benzyl alcohol, phenylethyl alcohol, anis alcohol, cinnamic alcohol; n-octylaldehyde, citral, citronellal, perilaldehyde, cyclamenaldehyde, acetaldehyde, butyraldehyde Aldehydes and their acetals such as propyl aldehyde and lyial; ketones such as methyl-n-amyl ketone, l-carvone, menthone, acetophenone, α-ionone; isoamyl acetate, geranyl acetate, citronellyl formate, benzyl formate, linalyl acetate , Linalyl propionate, methyl benzoate, methyl cinnamate, ethyl salicylate, amyl formate, butyl formate, ethyl formate, methyl dihydrojasmonate , Γ- nonalactone, γ- decalactone, esters and lactones such as γ- undecalactone can be mentioned.

  Among the aforementioned fragrances, in particular, acetaldehyde, propyl aldehyde, ethyl formate, butyraldehyde, butyl formate, amyl formate, isoamyl acetate, α-pinene, turpentine oil, methyl-n-amyl ketone, β-pinene, camphene, nutmeg oil, myrcene, Limonene, Citronella oil, Ocicle, Lemon oil, Terpinolene, Bergamot oil, Spearmint oil, Coriander oil, Thyme oil, Methyl benzoate, Pine oil, Acetophenone, Benzyl formate, Grapefruit oil, Lime oil, Orange oil, Camomil oil, Jasmine oil , Peppermint oil, bran oil, lavender oil, rose oil, neroli oil, pepper oil, dill oil, parsley oil, n-octylaldehyde, citronellal, l-carvone, menthone, benzyl alcohol, citral, citronellyl formate, Acid linalyl, cumin oil, linalool, effects of the present invention ethyl salicylate, phenylethyl alcohol, perilla aldehyde, geranyl acetate, geraniol, terpineol, l-menthol, linalyl propionate, to methyl cinnamate is remarkable.

  The bath fragrance composition obtained in the step (I) of the present invention may contain components other than the fragrance and the nonionic surfactant in accordance with its intended purpose, application, and form as described later. it can. In this case, content of the fragrance | flavor component contained in the fragrance | flavor composition for bath agents is determined in consideration of another viewpoint in addition to the viewpoint of the effect expression of this invention. For example, when the bath fragrance composition obtained in the step (I) of the present invention is used in combination with a bath fragrance composition, stabilization and fixation of the fragrance composition in the bath fragrance composition and the solid bath agent. It is preferable to add components other than the fragrance component and the nonionic surfactant to the extent that the object can be achieved for the purpose of suppressing the localization of the fragrance component. On the other hand, in order to ensure the freedom of blending into the bath composition, the higher the content of the fragrance component contained in the fragrance composition, the more preferable it is, so 2 mass% or more, preferably 3 mass% or more, More preferably, it is 4 mass% or more, More preferably, it is 6 mass% or more, Most preferably, it is 10 mass% or more.

Nonionic surfactant There is no restriction | limiting in particular about the kind of nonionic surfactant used for the fragrance composition for bathing agents obtained in process (I) of this invention, A conventionally well-known nonionic surfactant Any surfactant can be used, but from the standpoint of the scent, one or more selected from the group consisting of polyoxyalkylene alkyl ethers and / or polyoxyalkylene alkenyl ethers (hereinafter collectively referred to as “poly (alkylene)”). It is preferable to use an oxyalkylene alkyl (alkenyl) ether).

  Examples of the oxyalkylene group constituting the polyoxyalkylene alkyl (alkenyl) ether include an oxyethylene group and an oxypropylene group, and the oxyethylene group is preferred from the viewpoint of availability at low cost. The added mole number of the oxyalkylene group in the polyoxyalkylene alkyl (alkenyl) ether is preferably 2 to 30, more preferably 6 to 25, from the viewpoint of durability and solubility in water. More preferably, it is ~ 20. Moreover, as an alkyl group or an alkenyl group, a C8-C22 alkyl group or an alkenyl group is preferable from a solubility point, More preferably, it is a C12-C22 alkyl group or alkenyl group.

Specific examples of the polyoxyalkylene alkyl (alkenyl) ether include polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene octyldodecyl ether and the like.
Although the said nonionic surfactant can also be used by 1 type, it can also be used in combination of 2 or more type.

In the fragrance composition for bathing agents of the present invention, by using a small amount of nonionic surfactant, it is possible to obtain a remarkable scent of fragrance when dissolved in water. From this viewpoint, the content of the nonionic surfactant in the fragrance composition needs to be 0.1 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the fragrance component. In the present invention, from the above viewpoint, the ratio is preferably 1 part by mass or more and 10 parts by mass or less, and more preferably 3 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the fragrance component.
In this invention, the effect of this invention can be expressed by making the content rate of the said fragrance | flavor component and nonionic surfactant into the said range. That is, it is preferable to use the prepared fragrance composition for bathing agents in the above content ratio in order to exhibit the effects of the present invention. In particular, as described above, it is preferable that the perfume component and the nonionic surfactant are in a compatible state.

Other components In addition to the fragrance component and the nonionic surfactant, the fragrance composition for bathing agent obtained in the step (I) of the present invention includes a wetting agent, an enzyme, a binder, a disintegrant, Each component, such as a foaming agent, a dispersing agent, a pigment | dye, a fragrance | flavor, another surfactant, a buffering agent, a stabilizer, a pH adjuster, a medicinal component (hot spring component etc.), can be contained. Specifically, fumaric acid, succinic acid, sodium carbonate, sodium hydrogen carbonate, polyethylene glycol, starch, starch decomposition products, and the like can be contained.
In addition, there is no restriction | limiting in particular about the form of the fragrance | flavor composition for bathing agents obtained in process (I) of this invention, According to a use, it uses any form, such as a tablet, particle | grains, a powder, a granule, and a liquid. However, it is preferably used in the form of tablets or particles from the viewpoint of bath appearance, storage stability, and dissolution rate control. As these production methods, a well-known formulation method can be used, and examples thereof include an extrusion method, a tumbling granulation method, and a compression molding method (briquetter, tableting).

(Bath additive)
The bathing agent of the present invention is obtained by the method for producing a bathing agent of the present invention or contains the above fragrance composition for bathing agent. The content of the fragrance composition in the bathing agent depends on its use, but from the viewpoint of appropriate fragrance strength and sustained expression, it is usually contained in the bathing agent in an amount of 0.05 to 80% by mass. The content is preferably 0.1 to 40% by mass, more preferably 1 to 20% by mass. In addition, as content of the fragrance | flavor in a bath agent in that case, it is preferable to contain 0.001-8.0 mass% from the same reason, and it is more preferable to contain 0.01-4.0 mass%. Preferably, it is contained 0.05 to 1.5% by mass.
In addition to the above fragrance and nonionic surfactant, the bath additive of the present invention may further contain an additive for bath agents used in ordinary bath agents.
Specifically, the following components can be appropriately contained.

(1) Inorganic salts: sodium chloride, potassium nitrate, sodium nitrate, calcium nitrate, aluminum nitrate, sodium polyphosphate, ammonium chloride, sodium nitrate iron phosphate, sodium thiosulfate, sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, Magnesium carbonate, boric acid, metasilicic acid, silicic anhydride, etc.
(2) Organic acids: benzoic acid, citric acid, fumaric acid, tartaric acid, pyrrolidone carboxylic acid, succinic acid, malic acid and salts thereof.
(3) Herbal medicines / extracts / vitamins: sardines, peanuts, valerian, oysters, kokuboku, senkyu, orange peel, touki, ginseng powder, carrots, keihi, peonies, mint leaves, oxon, sanshin, bukuryo, dokukatsu, shobu, Sea bream, pine beetle, peony, jujube, ryuunou, saffron, succulent extract, chimpi, fennel, campi powder, chamomile, melissa, rosemary, malonie, western sawtooth grass, rice bran extract, onion extract and garlic extract, arnica, vitamin A, B , C, D, E, F, K etc.

(4) Oils / fats: cetyl octanoate, isopropyl adipate, isopropyl palmitate, isopropyl myristate, glyceryl myristate, butyl stearate, cholesteryl isostearate, coconut oil, jojoba oil, soybean oil, almond oil, olive oil, cypress Oil, cinnamon oil, castor oil, coconut oil, eucalyptus oil, liquid paraffin, white petrolatum, squalane, carnauba wax, beeswax, lanolin, etc.

(5) Dyes / pigments / pigments: Red No. 2, Yellow No. 4, Green No. 3, Blue No. 1, Red No. 213, Orange No. 205, Yellow No. 1, Green No. 204, Blue No. 2, etc. Natural tar dyes, titanium oxide, zinc oxide, calcium carbonate, carbonate Inorganic pigments such as magnesium, yellow iron oxide, red iron oxide (Bengara), black iron oxide, ultramarine.

(6) Alcohols: ethanol, stearyl alcohol, isopropyl alcohol, lauryl alcohol, cetyl alcohol, (iso) stearyl alcohol, oleyl alcohol, cholesterol and the like.
(7) Polyhydric alcohol: glycerin, propylene glycol, sorbitol, etc.
(8) Other surfactants: Anionic surfactants such as sodium alkyl sulfate and polyoxyethylene alkyl ether sulfate, various cationic surfactants and amphoteric surfactants.

(9) Water-soluble polymers: polyacrylic acid, polyvinyl pyrrolidone, polyvinyl alcohol, polyethylene oxide (polyethylene glycol) and the like.
(10) Polysaccharides / proteins / amino acids / enzymes: polysaccharides such as starch, carrageenan, hydroxyethylcellulose, methylcellulose, chitin, chitosan, mucopolysaccharides such as sodium carboxymethylcellulose, chondroitin sulfate, hyaluronic acid, collagen, elastin, keratin, Hybroin, casein and its derivatives, amino acids such as alanine, glycine, aspartic acid, glutamic acid, threonine, enzymes such as cellulase, protease, lipase, ceramide, nucleic acid (DNA, RNA) and the like.

(11) Silicone compounds: dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, alkyl-modified silicone, amino-modified silicone, alkyl / amino-modified silicone, amide-modified silicone, alkyl / amide-modified silicone, polyether-modified silicone, alkyl / Polyether-modified silicone, amino / polyether-modified silicone, amide / polyether-modified silicone, epoxy-modified silicone, fluorine-modified silicone, oxazoline-modified silicone, and their cross-linked products and cyclic silicones.
In addition to the above, the bathing agent of the present invention includes sulfur, mineral sand, hot spring flowers, neutral clay, sodium salicylate, egg yolk powder, iri rice cake, mica powder, kaolin, talc, skim milk powder, l-menthol, camphor, menthol Cooling agents such as derivatives, moisturizers, vasodilators, anti-inflammatory agents, antipruritic agents, bactericidal / preservatives, chelating agents, thickeners and the like may be added.

(Method to improve scent sustainability)
The present invention also relates to a method for improving the scent sustainability of a bath agent in water, wherein the bath agent or the perfume composition for bath agent is dissolved in water. The bathing agent and the fragrance composition for bathing agent are as described above. The amount of the bathing agent and the fragrance composition for bathing agent is not particularly limited, but is appropriately selected depending on the dosage form, the type and concentration of the active ingredient to be blended, the bath temperature, etc., and usually functions as a bathing agent. From the viewpoint of expression, it is preferable to add about 5 to 200 g, more preferably about 20 to 100 g per 200 L of bath water. Moreover, in this invention, when adding a bath agent and the fragrance | flavor composition for bath agents to water, in order to prevent volatilization of a fragrance | flavor component, it is preferable to make it melt | dissolve without stirring. By such a method, the bathing agent and the fragrance composition for bathing agent of the present invention can maintain the initial preferred level of fragrance for a long time. Here, “maintenance of a preferred level of scent” means that the difference between the initial scent intensity and the scent intensity after a predetermined time, for example, 60 minutes is small, and the initial scent intensity is a preferred level. Say.

The present invention will be described more specifically with reference to the following examples. However, the present invention is not limited to the following examples. In addition, about the bath agent obtained in each case, the fragrance sustainability was evaluated according to the method shown below.
<Scent sustainability evaluation>
45 g of each of the bath preparations prepared according to the formulation shown in Tables 1 and 2 below is put into a bathtub (120 cm long, 80 cm wide, 50 cm deep) with 175 L of 40 ° C tap water (general tap water in Sumida-ku, Tokyo). And dissolved uniformly without stirring. From the point of time when the fragrance was completely dissolved, immediately after 5 minutes, 30 minutes, and 60 minutes, 4 expert panelists performed sensory evaluation on the strength of the scent according to the following criteria. The average value was used as the sensory evaluation result. In addition, the sensory evaluation regarding the intensity | strength of a fragrance shows that the one where a value is high has a high intensity | strength of fragrance.

Evaluation 5: Smells quite strongly 4: Smells strongly 3: Smells well 2: Smells weakly 1: Slightly smells

Example 1
Step (I): Fragrance A and polyoxyethylene (EO addition mole number: 17) cetyl ether (trade name: Emulgen 220, manufactured by Kao Corporation) having the formulation shown in Table 1 are mixed and dissolved at 70 ° C. to obtain polyethylene glycol (Brand name: KPEG6000 manufactured by Kao Corporation) and sodium bicarbonate were mixed to obtain a fragrance composition for bathing agents shown in Table 2. The obtained composition was uniformly compatible.
Process (II): Based on the composition shown in Table 3 using the obtained fragrance composition for bathing agents, a tablet-shaped bathing agent was prepared by a conventional method. The prepared bath agent was evaluated for scent persistence by the above method. The results are shown in Table 4.

Example 2
Step (I): A bath fragrance composition was obtained in the same manner as in Example 1 except that the formulation shown in Table 2 was used.
Step (II): A bath agent was prepared in the same manner as in Example 1. The prepared bath agent was evaluated for scent persistence by the above method. The results are shown in Table 4.

Comparative Example 1
Step (I): Perfume composition for bathing agent having the composition shown in Table 2 by mixing perfume A shown in Table 1 used in Example 1 with polyethylene glycol (trade name: KPEG6000, manufactured by Kao Corporation) and sodium bicarbonate. I got a thing.
Step (II): Based on the composition shown in Table 3 for the obtained fragrance composition for bathing agents, a tablet bath was prepared in the same manner as in Example 1. The prepared bath agent was evaluated for scent persistence by the above method. The results are shown in Table 4.

Comparative Example 2
Step (I): A bath fragrance composition was obtained in the same manner as in Example 1 except that the formulation shown in Table 2 was used.
Step (II): A bathing agent was prepared in the same manner as in Example 1 with the obtained fragrance composition for bathing agent based on the composition shown in Table 3. The prepared bath agent was evaluated for scent persistence by the above method. The results are shown in Table 4.

Comparative Example 3
Step (I): A bath fragrance composition was obtained in the same manner as in Comparative Example 1 except that the formulation shown in Table 2 was used.
Step (II): Based on the composition of the obtained bath fragrance composition and nonionic surfactant shown in Table 3, a tablet-type bath was prepared in the same manner as in Example 1. The prepared bath agent was evaluated for scent persistence by the above method. The results are shown in Table 4.

  From Table 4, in each of Examples 1 and 2, even when compared with any of Comparative Examples 1, 2, and 3, the fragrance persistence was remarkably recognized while the initial fragrance was at a preferable level.

  The bathing agent obtained by the production method of the present invention is suitable for use as a bathing agent because it is excellent in scent sustainability while maintaining the strength of the scent while the initial scent is moderate.

Claims (7)

The manufacturing method of the bath agent which has the following process (I) and (II).
Step (I): A step of mixing at least one nonionic surfactant that is 0.1 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the fragrance component and the fragrance component.
Step (II): A step of preparing a bath agent from the composition obtained in Step (I) and an additive for bath agent.   The method for producing a bathing agent according to claim 1, wherein the nonionic surfactant is at least one selected from the group consisting of a polyoxyalkylene alkyl ether and a polyoxyalkylene alkenyl ether.   The bath agent obtained with the manufacturing method of Claim 1 or 2.   A fragrance composition for bathing agents comprising a fragrance component and at least one nonionic surfactant in an amount of 0.1 to 10 parts by mass with respect to 100 parts by mass of the fragrance component.   The fragrance composition for bathing agents according to claim 4, wherein the nonionic surfactant is at least one selected from the group consisting of polyoxyalkylene alkyl ethers and polyoxyalkylene alkenyl ethers.   The bath agent containing the fragrance composition for bath agents in any one of Claim 4 or 5.   The method to improve the fragrance persistence of the bath agent in water which melt | dissolves the bath agent of Claim 3 or 6 in water.