JP2005281151A - Bathing agent and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a bathing agent good in storage stability(stability with time), good in dispersibility in hot water and cloudiness when dispersed, also good in cloudiness stability, and yielding sufficient moist feeling and slippery feeling on the skin after bathing. <P>SOLUTION: The bathing agent comprises (a) 30-50 pts. mass of a hydrocarbon oil liquid at room temperature, (b) 2-7 pts. mass of a polyoxyethylene alkyl ether-type nonionic surfactant 11-18 in HLB number and/or a polyoxyethylene fatty acid ester-type nonionic surfactant 11-18 in HLB number, (c) 1-4 pt(s). mass of a sorbitan fatty acid ester-type nonionic surfactant 2-8 in HLB number, (d) 0.2-2 pt(s). mass of a 14-24C monohydric alcohol ≥40°C in melting point and (e) 40-60 pts. mass of water, wherein the total amount of the components(a), (b), (c) and (d) is 40-60 pts. mass and the mass ratios a/d and b/d are (25:1) to (150:1) and (4:3) to (10:1), respectively. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bath agent and a method for producing the same. More specifically, the present invention relates to an emulsified bath agent and a method for producing the same.

  In addition to cleansing the body, bathing is known to have various effects on beauty and health, such as promoting blood circulation by the action of heat, enhancing metabolism, and mentally relaxing. On the other hand, when bathing, the skin surface lipid (sebum) forming the skin surface film is temporarily removed, resulting in a decrease in skin elasticity and flexibility and loss of skin moisture. Therefore, it becomes easy to cause rough skin especially in the winter season when it is easy to dry. From the viewpoint of skin health, it is very important to keep the skin moisture and sebum amount in appropriate ranges.

  In order to maintain the moisture and sebum amount of the above skin, various skin care products such as skin lotion and emulsion are generally used. In addition, the above problems are solved by using a bathing agent containing an oily component or a moisturizing component even during bathing.

  Examples of bathing agents include powder types, liquid types, and tablet types, and emulsified type bathing agents, which are one type of liquid type, provide a moisturizing effect due to oil components, and the bath is sufficiently cloudy. This is popular because it gives you a luxury like a milk bath and gives you a spiritual relaxation. However, the emulsified bath agent has poor stability over time, is likely to cause separation and creaming (aggregation), and the oil phase component and the aqueous phase component may be phase separated even when stirred. In addition, separation or creaming may occur when this bath agent is added to the hot water of a bathtub.

Various studies have been conducted in order to improve the temporal stability of emulsified baths. For example, Patent Document 1 discloses a cloudy bathing agent (stock solution) having a specific oil content, a nonionic surfactant having an HLB of 8 to 14, and a specific pigment in a specific ratio and having excellent stability over time. ) Is disclosed. Patent Document 2 discloses a bath agent in which a specific composition is emulsified using a high-pressure homogenizer, thereby finely emulsifying particles and improving stability over time. However, although these bathing agents have improved stability over time, there are problems that sufficient cloudiness cannot be obtained when used in bath water, separation, creaming, and the like occur. Further, the skin cannot be sufficiently moistened and smooth.
Japanese Patent Laid-Open No. 6-92839 JP-A-11-189526 W. C. Griffin, J. et al. Soc. Cosmetic, 33, 1180 (1960)

  The object of the present invention is storage stability (stable with time), dispersibility in hot water and white turbidity when dispersed, excellent white turbidity stability, and sufficiently moisturized skin after bathing Another object of the present invention is to provide a bath agent that gives a smooth feeling and a method for producing the same.

  The bathing agent of the present invention comprises a hydrocarbon oil (a) which is liquid at room temperature; a polyoxyethylene alkyl ether type nonionic surfactant having an HLB of 11 to 18 and a polyoxyethylene fatty acid ester non-type having an HLB of 11 to 18 At least one ionic surfactant (b); a sorbitan fatty acid ester type nonionic surfactant (c) having an HLB of 2 to 8; a monohydric alcohol having a melting point of 40 ° C. or higher and a carbon number of 14 to 24 (D); and a bathing agent containing water (e), wherein a is 30 to 50 parts by mass, b is 2 to 7 parts by mass, c is 1 to 4 parts by mass, and d is 0. 2 to 2 parts by mass, 40 to 60 parts by mass of e, the total amount of a, b, c and d is 40 to 60 parts by mass, and the mass ratio of a to d a / d is 25/1 to 150/1 and the mass ratio b / d between b and d is 4 / It is a 10/1.

  The method for producing a bath agent of the present invention comprises (1) a step of mixing the a, the b, the c, and the d, (2) a step of further mixing a part of the e, and (3) (2 The step obtained by adding and mixing the mixture obtained in the step (b) to the remainder of the e in this order.

  The method for producing a bath agent of the present invention also includes (1) a step of mixing the a, the b, the c, and the d, and (2) a total mass of the a, the b, the c, and the d. A step of mixing 0.1 to 0.3 times the amount of e at 70 ° C. to 95 ° C., and (3) the mixture obtained in step (2) and the remainder of the e The step of adding and mixing the mixture to the remainder of e is added in this order so that the temperature of the liquid containing 0 to 50 ° C.

  The bathing agent of the present invention has good storage stability (stability over time), dispersibility in hot water and white turbidity when dispersed, and also has excellent white turbidity stability, and is sufficiently moisturized after bathing. Gives a feeling and smooth feeling.

  The bathing agent of the present invention is a hydrocarbon oil (a) which is liquid at normal temperature, a specific nonionic surfactant (b) having an HLB of 11 to 18, and a sorbitan fatty acid ester type nonionic interface having an HLB of 2 to 8. The activator (c), the monovalent alcohol (d) having 14 to 24 carbon atoms having a melting point of 40 ° C. or higher, and water (e) are contained in specific ratios, and if necessary, other components (f) are added. May be contained. Hereinafter, each component and bathing agent will be described sequentially.

(Each component)
(A) Hydrocarbon oil The hydrocarbon oil used in the bath agent of the present invention (hereinafter sometimes referred to as component a) is not particularly limited as long as it is a hydrocarbon oil that is liquid at room temperature, preferably 25 ° C. A hydrocarbon oil having 10 or more carbon atoms is preferable from the viewpoint of improving the stability of the bathing agent obtained over time, the moist feeling of the skin after bathing, and the smooth feeling. The hydrocarbon oil may have a linear, branched, or cyclic structure, and may contain an unsaturated bond. It may be a natural product contained in petroleum, plant essential oil, or the like, or may be a chemically synthesized product. Specific examples include linear paraffins such as decane, undecane, dodecane, tridecane, tetradecane, pentadecane and decene, isoparaffins having a branched chain, squalane, squalene and terpenes. Among these, linear paraffin, isoparaffin, and squalane having a viscosity at 25 ° C. of 100 mPa · s or less are preferable. These hydrocarbon oils may be used alone or in combination of two or more.

(B) Nonionic surfactant having an HLB of 11 to 18 The nonionic surfactant having an HLB of 11 to 18 used in the bathing agent of the present invention (hereinafter may be referred to as b component) has an HLB of 11 A polyoxyethylene alkyl ether type (POEAE type) nonionic surfactant having -18 or a polyoxyethylene fatty acid ester type (POEFAE type) nonionic surfactant having an HLB of 11-18. These POEAE type or POEFAE type nonionic surfactants may be used alone or in combination of two or more.

  The POEAE type nonionic surfactant is a compound obtained by adding ethylene oxide to a monohydric alcohol having 10 to 22 carbon atoms. The number of moles of ethylene oxide added is preferably from 5 to 30, more preferably from 8 to 20, from the viewpoint of improving the dispersibility of the obtained bath agent in hot water. Specific examples include polyoxyethylene (15 mol) cetyl ether, polyoxyethylene (18 mol) stearyl ether, polyoxyethylene (13 mol) oleyl ether, and the like.

  The POEFAE type nonionic surfactant is a compound obtained by adding ethylene oxide to a fatty acid having 10 to 22 carbon atoms. The number of moles of ethylene oxide added is preferably from 5 to 30, more preferably from 8 to 20, from the viewpoint of improving the dispersibility of the obtained bath agent in hot water. Specific examples include polyethylene glycol monostearate (12 mol), polyethylene glycol monopalmitate (20 mol), polyethylene glycol monooleate (20 mol), and the like.

  The HLB of the b component POEAE type or POEFAE type nonionic surfactant is 11 to 18, preferably 13 to 17. In this specification, the HLB value refers to a value determined by the HLB concept of Griffin (for example, Non-Patent Document 1). When the HLB is less than 11, not only the smooth feeling after bathing is weakened, but also the stability of the bathing agent obtained over time and the stability of white turbidity when the bathing agent is dispersed in hot water are deteriorated. When the HLB exceeds 18, not only a sticky feeling is generated on the skin after bathing, but also the temporal aging stability of the bathing agent and hot water becomes poor. The component b can be used alone or in combination of two or more.

(C) Sorbitan fatty acid ester type nonionic surfactant having 2 to 8 HLB Sorbitan fatty acid ester type (SFAE type) nonionic surfactant having 2 to 8 HLB used for the bathing agent of the present invention c) may be obtained by esterifying a fatty acid having 10 to 22 carbon atoms at a ratio of 1 to 3 moles with respect to 1 mole of sorbitol. Specific examples include sorbitan monolaurate, sorbitan monomyristate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, sorbitan sesquistearate, sorbitan trioleate, and the like. Preferred are sorbitan monopalmitate, sorbitan monostearate, and sorbitan monooleate. These SFAE-type nonionic surfactants may be used alone or in combination of two or more. The HLB of the SFAE type nonionic surfactant of component c is 2 to 8, preferably 4 to 7. When the HLB is less than 2 or more than 8, the bathing agent obtained is poor in stability over time, and the white turbidity when the bathing agent is dispersed in hot water is not sufficient, and the white turbidity over time is also poor. .

(D) Monohydric alcohol having 14 to 24 carbon atoms The monohydric alcohol having 14 to 24 carbon atoms (hereinafter sometimes referred to as “d component”) used in the bathing agent of the present invention is an alcohol having a melting point of 40 ° C. or higher. If there is, there is no particular limitation. Preferably, it is a C14-18 monohydric alcohol. These monohydric alcohols having 14 to 24 carbon atoms are usually obtained by hydrolysis of whale waxes, high-pressure hydrogen reduction or fatty acid sodium reduction of fatty acids, synthesis from petroleum resources, and the like. Specific examples include cetyl alcohol (melting point 50 ° C.), stearyl alcohol (melting point 58 ° C.), behenyl alcohol (melting point 78 ° C.), and the like. These monohydric alcohols may be used alone or in combination of two or more. When the melting point is less than 40 ° C., or when the carbon number is less than 14 or more than 24, the stability of the bathing agent obtained is poor, and the turbidity when the bathing agent is dispersed in hot water is not sufficient, In addition, the aging stability of cloudiness is poor.

(E) Water Water used in the bathing agent of the present invention (hereinafter sometimes referred to as “e” component) is not particularly limited. For example, purified water, ion exchange water, tap water (tap water), distilled water, and natural water such as spring water and seawater desalted water can be used.

(F) Other components As other components used in the bath agent of the present invention, those skilled in the art commonly use additives for bath agents. These additives can be blended within a range that does not impair the performance of the present invention. Examples of additives include lower alcohols such as ethanol and isopropyl alcohol; polyhydric alcohols such as propylene glycol and dipropylene glycol; natural fats and oils such as beef tallow, pork tallow and fish oil; glyceryl tri-2-ethylhexanoate and the like. Synthetic triglycerides; ester oils such as oleyl oleate and octyldodecyl myristate; waxes such as beeswax and carnauba wax; silicone derivatives such as polyether-modified dimethylpolysiloxane and amino-modified dimethylpolysiloxane; oils such as lanolin, lanolin derivatives and lecithin Bases: Nonionic surfactants such as alkylpolyglucosides and alkanolamides; Anionic surfactants such as soaps, acylmethyltaurine salts, amide ether sulfates; , Amphoteric surfactants such as alkyliminodiacetate; semipolar surfactants such as alkylamine oxide and polyoxyethylene alkylamine oxide; cationic surfactants such as alkyltrimethylammonium chloride and dialkyldimethylammonium chloride; Natural pigments such as chlorophyll and β-carotene, water-soluble polymers such as alginic acid and carboxyvinyl polymer; inorganic salts or organic salts such as borax and sodium citrate; pH adjusters such as acids and alkalis; bactericides; chelating agents Antioxidants, ultraviolet absorbers, natural extracts derived from animals and plants, and fragrances.

(Bath additive)
The bathing agent of the present invention is a hydrocarbon oil (a component) which is liquid at normal temperature, a specific nonionic surfactant (b component) having an HLB of 11 to 18, and a sorbitan fatty acid ester type non-HLB of 2 to 8. Contains an ionic surfactant (component c), a monohydric alcohol having 14 to 24 carbon atoms having a melting point of 40 ° C. or higher (component d), and water (component e) in specific proportions, and other if necessary The component (f component) may be contained.

  Content of a component in the bath agent of this invention is 30 mass parts-50 mass parts, Preferably it is 35 mass parts-45 mass parts. When the amount is less than 30 parts by mass, the white turbidity is not sufficient when the obtained bath agent is dispersed in hot water. Furthermore, the moist and smooth feeling of the skin after bathing is weakened. When it exceeds 50 parts by mass, the bathing agent obtained is poor in stability over time, and further, the dispersibility of the bathing agent in hot water is deteriorated. In addition, the bathing agent may be gelled and difficult to manufacture.

  Content of b component in the bath agent of this invention is 2 mass parts-7 mass parts, Preferably they are 3 mass parts-6 mass parts. When the amount is less than 2 parts by mass, the bathing agent has poor stability over time, and the moist feeling of the skin after bathing is weakened. When the amount exceeds 7 parts by mass, the bathing agent obtained has poor stability over time, and the dispersibility of the bathing agent in hot water also deteriorates. Furthermore, the smooth feeling of the skin after bathing becomes weak and sticky. In some cases, the bathing agent gels, making it difficult to manufacture. .

  Content of c component in the bath agent of this invention is 1 mass part-4 mass parts, Preferably it is 2 mass parts-3 mass parts. When the amount is less than 1 part by mass, the bathing agent obtained has poor stability over time, and the cloudiness over time when the bathing agent is dispersed in hot water is also poor. The skin feels smooth and smooth after bathing. When the amount exceeds 4 parts by mass, the bathing agent obtained has poor stability over time, and the cloudiness over time when the bathing agent is dispersed in hot water also deteriorates.

  Content of d component in the bath agent of this invention is 0.2 mass part-2 mass parts, Preferably it is 0.4 mass part-1.5 mass parts. When the amount is less than 0.2 part by mass, the bathing agent obtained has poor stability over time. Further, when the bath agent is dispersed in hot water, the white turbidity is not sufficient, and the white turbidity is deteriorated over time. And the smooth feeling of the skin after bathing becomes weak. When it exceeds 2 parts by mass, the bathing agent obtained has poor stability over time. Furthermore, the dispersibility of the bath agent in hot water is poor, and the white turbidity is not sufficient. Moreover, the aging stability of the cloudiness also deteriorates. Furthermore, the bathing agent gels, making it difficult to manufacture.

  Content of e component in the bath agent of this invention is 40 mass parts-60 mass parts. When the amount is less than 40 parts by mass, the stability of the bathing agent obtained is poor. Furthermore, the dispersibility of the bathing agent in hot water is poor, and the turbid stability over time is also poor. The bathing agent gels, making it difficult to manufacture. When it exceeds 60 parts by mass, the white turbidity is not sufficient when the bathing agent is dispersed in hot water. The skin feels moist and smooth after bathing.

  Furthermore, the total amount of component a, component b, component c, and component d in the bath agent of the present invention is 40 to 60 parts by mass, preferably 40 to 50 parts by mass. When the amount is less than 40 parts by mass, the white turbidity is not sufficient when the bathing agent is dispersed in hot water. The skin feels moist and smooth after bathing. When it exceeds 60 parts by mass, the bathing agent obtained has poor stability over time. Furthermore, the dispersibility of the bathing agent in hot water is poor, and the aging stability of white turbidity is also poor. The bathing agent gels, making it difficult to manufacture.

  The mass ratio (a / d) of the component a and component d in the bath agent of the present invention is 25/1 to 150/1, preferably 30/1 to 100/1. When a / d is less than 25/1, the stability of the bathing agent obtained with time is poor, and the stability of white turbidity over time when the bathing agent is dispersed in hot water is also poor. Furthermore, the bathing agent gels, making it difficult to manufacture. When it exceeds 150/1, the aging stability of the obtained bath agent is poor. Further, when the bath agent is dispersed in hot water, the white turbidity is not sufficient, and the aging stability of the white turbidity is poor.

  The mass ratio (b / d) between component b and component d in the bathing agent of the present invention is 4/3 to 10/1, preferably 2/1 to 8/1, more preferably 3/1 to 7 /. 1. When b / d is less than 4/3, the bathing agent obtained has poor stability over time. Further, when the bath agent is dispersed in hot water, the white turbidity is not sufficient, and the aging stability of the white turbidity is also poor. When it exceeds 10/1, the aging stability of the obtained bath preparation is poor. Furthermore, when the bath agent is dispersed in hot water, the white turbidity is not sufficient, and the aging stability of the white turbidity is also poor. The smooth feeling of the skin after bathing is also weakened.

  The bathing agent of the present invention can be produced, for example, by the following method. That is, the method for producing a bathing agent of the present invention includes (1) a step of mixing the a, the b, the c, and the d, and (2) a step of mixing a part of the e (eI component). And (3) a step of adding and mixing the mixture obtained in the steps of (2) to the remainder (eII component) of e in this order. In this way, the e component is first mixed separately (the eI component), and the mixture of the a component to the d component and the eI component obtained in the step (2) is added to the eII component. Compared to the case of mixing at a time or adding the eII component to the mixture obtained in (2) above, the storage stability (time stability), the dispersibility in hot water and the cloudiness when dispersed In addition, it is possible to obtain a bath agent having further excellent white turbidity stability.

  From the point of improving the temporal stability of the obtained bath agent, the white turbidity when the bath agent is dispersed in hot water, and the temporal stability of the white turbidity, the eI component is based on the total mass of the components a to d. The amount is preferably 0.1 times to 0.3 times, more preferably 0.13 times to 0.26 times. Hereinafter, “double amount” means a multiple amount based on mass.

  The mixing temperature of the eI component is preferably from 70 to 95 ° C., more preferably from the viewpoint of improving the temporal stability of the obtained bath agent, the white turbidity when the bath agent is dispersed in hot water, and the temporal stability of the white turbidity. 75-90 ° C.

  In the process of adding and mixing a mixture of component a to component d and component eI to component eII, improving the stability over time of the resulting bath agent, the white turbidity when the bath agent is dispersed in hot water, and the stability over time of white turbidity Therefore, the mixture is added and mixed so that the temperature of the liquid containing the mixture and the eII component is preferably 0 to 50 ° C., more preferably 10 to 48 ° C.

  The bathing agent of the present invention can be used, for example, as a diluted emulsion that prepares a water-diluted solution and gives a moist and smooth feeling to the skin, for example, after bathing, in addition to being dispersed in bath water during bathing. Moreover, when bathing cannot be performed, it can be used as a wiping agent that gives the skin a moist and smooth feeling while wiping the body to remove excess dirt such as sebum.

  Next, the present invention will be described in more detail by way of examples.

  The bath agents of Examples 1 to 7 and Comparative Examples 1 to 4 were prepared as follows. In each of the examples and comparative examples, the stirring and mixing were performed using a stirrer having a stainless steel stirring blade (propeller type) having a diameter of 5 cm under the condition that the rotation speed of the stirring blade was 200 rpm.

(Example 1)
After stirring and mixing the a component, b component, c component, and d component shown in Table 1 at 85 ° C. for about 10 minutes at the ratio shown in Table 1, the total mass of components a to d is 0. Water (eI component) corresponding to 19 times the amount was added, and further stirred and mixed at 85 ° C. for about 30 minutes (mixture 1). This mixture 1 was added to the remaining water (eII component) and mixed at 42 ° C. to obtain a bath agent (bath agent 1).

(Example 2)
After stirring and mixing the a component, b component, c component, and d component shown in Table 1 at 75 ° C. for about 10 minutes at the ratio shown in Table 1, the total mass of components a to d is 0. Water (eI component) corresponding to 21 times the amount was added, and further stirred and mixed at 80 ° C. for about 15 minutes (mixture 2). This mixture 2 was added to the remaining water (eII component) and mixed at 46 ° C. to obtain a bath agent (bath agent 2).

(Example 3)
After stirring and mixing the a component, b component, c component, and d component shown in Table 1 at 75 ° C. for about 10 minutes at the ratio shown in Table 1, the total mass of components a to d is 0. Water (eI component) corresponding to 23 times the amount was added, and further stirred and mixed at 85 ° C. for about 30 minutes (mixture 3). This mixture 3 was added to the remaining water (eII component) and mixed at 40 ° C. to obtain a bath agent (bath agent 3).

Example 4
After stirring and mixing the a component, b component, c component, and d component shown in Table 1 at 75 ° C. for about 10 minutes at the ratio shown in Table 1, the total mass of components a to d is 0. Water (eI component) corresponding to 14 times the amount was added, and further stirred and mixed at 85 ° C. for about 30 minutes (mixture 4). This mixture 4 was added to the remaining water (eII component) and mixed at 40 ° C. Further, a premix of polyoxyethylene (20 mol) sorbitan monooleate and a fragrance was mixed at 40 ° C. to obtain a bath agent (bath agent 4).

(Example 5)
After stirring and mixing the a component, b component, c component, and d component shown in Table 1 at 75 ° C. for about 10 minutes at the ratio shown in Table 1, the total mass of components a to d is 0. Water (eI component) corresponding to 21 times the amount was added, and further stirred and mixed at 85 ° C. for about 30 minutes (mixture 5). This mixture 5 was added to the remaining water (eII component) and mixed at 42 ° C. Furthermore, a premix of polyoxyethylene (20 mol) sorbitan monooleate and a fragrance was mixed at 40 ° C. to obtain a bath agent (bath agent 5).

(Example 6)
After stirring and mixing the a component, b component, c component, and d component shown in Table 1 at a rate shown in Table 1 at 80 ° C. for about 10 minutes, the total mass of components a to d is 0. Water (eI component) corresponding to 21 times the amount was added, and further stirred and mixed at 80 ° C. for about 15 minutes (mixture 6). This mixture 6 was added to the remaining water (eII component) and mixed at 67 ° C. to obtain a bath agent (bath agent 6).

(Example 7)
After stirring and mixing the a component, b component, c component, and d component shown in Table 1 at a rate shown in Table 1 at 80 ° C. for about 10 minutes, the total mass of components a to d is 0. Water (eI component) corresponding to .62 times the amount was added, and further stirred and mixed at 75 ° C. for about 10 minutes (mixture 7). The mixture 7 was added to the remaining water (eII component) and mixed at 46 ° C. to obtain a bath agent (bath agent 7).

(Comparative Example 1)
After stirring and mixing a component, b component, c component, d component and refined jojoba oil shown in Table 1 at 85 ° C. for about 10 minutes at the ratio shown in Table 1, the total mass of components a to d is increased. On the other hand, water (eI component) corresponding to 0.25 times the amount was added, and further stirred and mixed at 85 ° C. for about 30 minutes (mixture 8). The mixture 8 was added to the remaining water (eII component) and mixed at 43 ° C. to obtain a bath agent (bath agent 8).

(Comparative Example 2)
After stirring and mixing the a component, b component, c component, and d component shown in Table 1 at 75 ° C. for about 10 minutes at the ratio shown in Table 1, the total mass of components a to d is 0. Water (eI component) corresponding to 24 times the amount was added, and further stirred and mixed at 85 ° C. for about 30 minutes (mixture 9). The mixture 9 was added to the remaining water (eII component) and mixed at 40 ° C. to obtain a bath agent (bath agent 9).

(Comparative Example 3)
A mixture 10 was obtained in the same manner as in Comparative Example 2 except that the a component, b component, c component, and d component shown in Table 1 were mixed at the ratio shown in Table 1. Furthermore, the mixture 10 was added to the remaining water (eII component) and mixed at 40 ° C. to obtain a bath agent (bath agent 10).

(Comparative Example 4)
After stirring and mixing the a component, b component, c component, and d component shown in Table 1 at 85 ° C. for about 10 minutes at the ratio shown in Table 1, the total mass of components a to d is 0. Water (eI component) corresponding to 20 times the amount was added, and further stirred and mixed at 85 ° C. for about 30 minutes (mixture 11). This mixture 11 was added to the remaining water (eII component) and mixed at 42 ° C. to obtain a bath agent (bath agent 11).

(Example 8: Evaluation of each bath agent)
The bathing agent obtained in Examples 1 to 7 (bathing agents 1 to 7) and the bathing agent obtained in Comparative Examples 1 to 4 (bathing agents 8 to 11) were used. Dispersibility in water, white turbidity when dispersed, stability over time of the diluted solution, and moist and smooth feeling after bathing were evaluated as follows. The results are also shown in Table 1. In Table 1, ◯ is very good, Δ is a level where there is no problem in practical use, and × indicates that there is a problem in practical use.

(1) Stability over time of bathing agents Each bathing agent is stored at 5 ° C, 25 ° C and 50 ° C for 4 weeks, and phase separation and creaming are observed, and the stability over time is evaluated according to the following criteria. It is shown in Table 1.
○: Phase separation and creaming do not occur at any temperature, and further no precipitation and cage occur. Δ: Phase separation or creaming occurs slightly at any temperature, and precipitation and cage slightly occur. ×: Any temperature Also causes phase separation or creaming, and further precipitation and trapping

(2) Stability over time of diluted solution Prepared in an aqueous solution containing 0.03 parts by mass of each bath agent. 20 g of this aqueous solution was placed in a 50 ml screw tube and stored at 30 ° C., 40 ° C. and 50 ° C. for 24 hours. The state of phase separation and creaming after storage was evaluated in the same manner as the evaluation of the stability over time of the bathing agent of item (1), and the results are shown in Table 1.

(3) Dispersibility in hot water A total of 20 men, including 6 men (27 to 45 years old) and 14 women (23 to 58 years old), served as panelists. The panelist was allowed to add 60 mL of bathing agent to 180 L of hot water in the bath, and then bathed. The dispersibility of the bathing agent was scored according to the following criteria.
2 points: Dispersed quickly after the bathing agent was added 1 point: Dispersion took some time after the bathing agent was added 0 points: The average value of the obtained points that did not disperse easily after the bathing agent was added Table 1 shows the case of 1.5 or more as ◯ and less than 1.5 points as x.

(4) Turbidity when dispersed in hot water A total of 20 men including 6 men (27 to 45 years old) and 14 women (23 to 58 years old) were used as panelists. In the panel, 60 mL of bathing agent was dispersed in 180 L of hot water in the bathtub, and then bathed. The bath turbidity was scored according to the following criteria.
2 points: The turbidity of the bathtub is sufficient during bathing 1 point: The turbidity of the bathtub is slightly insufficient during bathing 0 points: The average of the obtained points that the turbidity of the bathtub is insufficient during bathing The values were obtained and shown in Table 1 as O when the average value was 1.5 or more and x as less than 1.5 points.

(5) Moist feeling A total of 20 people including 6 men (27 to 45 years old) and 14 women (23 to 58 years old) were used as panelists. The panelist was allowed to add 60 mL of bathing agent to 180 L of hot water in the bath, and then bathed. The skin moist feeling after bathing was scored according to the following criteria.
2 points: The skin feels moist enough and feels healthy. 1 point: The skin feels slightly soft and moist, and the skin feels slightly weak. 0 points: The skin is bulky and moist. The average value of the obtained scores was obtained, and the case where the average value is 1.5 or more is shown in Table 1, and the value less than 1.5 points is shown in Table 1.

(6) Smooth feeling A total of 20 people including 6 men (27 to 45 years old) and 14 women (23 to 58 years old) were used as panelists. The panelist was allowed to add 60 mL of bathing agent to 180 L of hot water in the bath, and then bathed. The smoothness of the skin after bathing was scored according to the following criteria.
2 points: Feeling that the smooth feeling of the skin is sufficient 1 point: Feeling that the smooth feeling of the skin is slightly weak 0 points: Finding the average value of the obtained points that feel the smooth feeling of the skin is weak, the average value is 1 Table 1 shows the case of .5 or more as ○, and less than 1.5 points as x.

  The bathing agents of Examples 1 to 7 (baths 1 to 7) were all excellent in stability over time, quickly dispersed in hot water in the bathtub, sufficiently clouded with hot water, and excellent in time stability of the diluted solution. Furthermore, the skin after bathing was sufficiently moist and smooth. In addition, the bathing agents of Examples 1 to 5 using the preparation method of the present invention were further excellent in terms of the temporal stability, the white turbidity of hot water, and the temporal stability of the white turbid liquid. On the other hand, sufficient performance was not obtained with the bath agents of Comparative Examples 1 to 4 (bath agents 8 to 11). In other words, the bathing agent (bathing agent 8) of Comparative Example 1 has a component a less than the range of the present invention, so the white turbidity is not sufficient, and the skin feels smooth and smooth after bathing. It was weak. The bathing agent (bathing agent 9) of Comparative Example 2 had a component c less than the range of the present invention, the skin moist and smooth feeling after bathing was weak, and the bathing agent and dilute solution had poor temporal stability. . The bathing agent of Comparative Example 3 (bathing agent 10) had less component b than the range of the present invention, dispersibility in hot water, poor stability over time of the bathing agent and dilute solution, and weak skin moist feeling after bathing. . The bathing agent of Comparative Example 4 (bathing agent 11) has d component less than the range of the present invention, and a / d and b / d are beyond the range of the present invention, so the white turbidity is not sufficient, Not only did the stability of the bathing agent and the diluted solution deteriorate, but the smoothness of the skin after bathing was weak.

  The bath agent of the present invention has good storage stability (stable with time), dispersibility in hot water and white turbidity when dispersed, and also has excellent white turbidity stability in hot water, and after bathing, Gives enough moist and smooth feeling. In addition, the bath preparation of the present invention is prepared by diluting with water to dilute the emulsion that gives the skin a moist and smooth feeling, or moisturizes the skin while removing dirt such as excess sebum by wiping the body. It can also be used as a wiping agent that gives a smooth feeling.

Claims (3)

Hydrocarbon oil (a) which is liquid at normal temperature; among polyoxyethylene alkyl ether type nonionic surfactants having HLB of 11 to 18 and polyoxyethylene fatty acid ester type nonionic surfactants having HLB of 11 to 18 A sorbitan fatty acid ester type nonionic surfactant (c) having an HLB of 2 to 8; a monohydric alcohol (d) having a melting point of 40 ° C. or higher and a carbon number of 14 to 24; and water ( a bathing agent containing e),
30 to 50 parts by mass of a, 2 to 7 parts by mass of b, 1 to 4 parts by mass of c, 0.2 to 2 parts by mass of d, 40 to 60 parts by mass of e,
The total amount of the a, the b, the c and the d is 40 to 60 parts by mass, and the mass ratio a / d of the a and the d is 25/1 to 150/1, and the b and the The bath agent whose mass ratio b / d with d is 4/3 to 10/1. It is a manufacturing method of the bath agent according to claim 1,
(1) mixing the a, the b, the c, and the d,
(2) A step of further mixing a part of the e, and (3) a step of adding and mixing the mixture obtained in the step (2) to the remainder of the e in this order. It is a manufacturing method of the bath agent according to claim 1,
(1) mixing the a, the b, the c, and the d,
(2) A step of mixing 0.1 to 0.3 times the amount of the e at 70 ° C. to 95 ° C. with respect to the total mass of the a, the b, the c and the d. And (3) adding and mixing the mixture to the remainder of e so that the temperature of the liquid containing the mixture obtained in the process of (2) and the remainder of e is 0 ° C. to 50 ° C. Including in this order, the method.