JP6764413B2 - Skin cleanser composition - Google Patents

Description

The present invention relates to a skin cleansing composition.

Conventionally, a skin cleansing composition that contains a fatty acid salt, has good foaming properties, does not give a sticky or taut feeling to the skin after drying, and can make the skin refreshing after washing has been proposed (for example). See Patent Document 1). However, when the skin cleansing composition is used in hard water containing a large amount of metal ions, divalent metal ions such as calcium ions in the hard water and a fatty acid salt are combined to form a metal salt of the fatty acid during washing. There are problems such as slow foaming and a feeling of tension on the skin after drying.
For this reason, a skin cleansing composition containing a fatty acid salt, an amide ether derivative, and a metal sequestering agent has been proposed as a cleansing agent having excellent foaming and skin feel even in hard water (see, for example, Patent Document 2). However, in the above proposal, the blending amount of the conventional metal blockade is limited depending on the type, and even if the blending upper limit is not set, the blending amount is restricted from the viewpoint of formulation stability and skin irritation. Therefore, the effect of the metal sequestering agent could not be fully exerted.

Further, in order to eliminate the feeling of tension on the skin after drying, a cleaning agent composition containing polyethylene glycol or a specific hypoallergenic surfactant has been proposed (see, for example, Patent Documents 3 and 4). .. However, these proposals have the problem that they do not feel like they have been washed off due to the sliminess during rinsing.
Therefore, foaming in hard water is quick, the amount of foam in hard water is abundant, and when rinsing with hard water, it is possible to obtain a feeling that the skin has been washed cleanly without being slimy, and there is no sticky or taut feeling on the skin after drying. It is strongly desired to provide a skin cleansing composition having good appearance stability.

International Publication No. 2004/098558 Pamphlet Japanese Unexamined Patent Publication No. 10-218758 Japanese Unexamined Patent Publication No. 2001-072998 Japanese Unexamined Patent Publication No. 9-13096

An object of the present invention is to solve the above-mentioned problems in the past and to achieve the following object. That is, in the present invention, foaming in hard water is quick, the amount of foam in hard water is abundant, and when rinsing with hard water, it is possible to obtain a feeling that the skin has been washed cleanly without being slimy, and the skin feels sticky and taut after drying. Provided is a skin cleansing composition having no problem and good appearance stability.
Here, the hard water refers to water having a hardness of 121 mg / L or more. The hardness can be calculated by the following formula.
Hardness (mg / L) = [Calcium amount (mg / L) x 2.5] + [Magnesium amount (mg / L) x 4]

As a result of diligent studies by the present inventors in order to solve the above problems, (A) (a1) lauric acid, (a2) myristic acid, (a3) palmitic acid, and (a4) stearic acid, and (a5). At least one polyhydric alcohol selected from fatty acid salts that are neutralized with basic compounds, (B) gloss enhancers, (C) propylene glycol, sorbitol, ethylene glycol, glycerin, and 1,3-butylene glycol. (D) contains at least one polyethylene glycol selected from polyethylene glycols having an average molecular weight of 900 to 12,500, and (E) a copolymer composed of dimethyldiallyl ammonium chloride and acrylamide, and the above-mentioned (a1) to The skin cleaning agent composition containing the component (a4) and the components (D) and (E) in a predetermined ratio has fast foaming in hard water, abundant foaming amount in hard water, and when rinsing with hard water. It was found that there was no slimy feeling and the feeling of having been washed cleanly was obtained, there was no sticky feeling and no feeling of tension on the skin after drying, and the appearance stability was good.

The present invention is based on the above-mentioned findings by the present inventor, and the means for solving the above-mentioned problems are as follows. That is,
<1> Fatty acid salt, which is a neutralized product of (A) (a1) lauric acid, (a2) myristic acid, (a3) palmitic acid, and (a4) stearic acid, and (a5) a basic compound.
(B) Gloss imparting agent,
(C) At least one polyhydric alcohol selected from propylene glycol, sorbitol, ethylene glycol, glycerin, and 1,3-butylene glycol.
It contains (D) at least one polyethylene glycol selected from polyethylene glycols having an average molecular weight of 900 to 12,500, and (E) a copolymer composed of dimethyldiallylammonium chloride and acrylamide.
The content (mass%) of the component (a2), the content (mass%) of the component (a1), the content (mass%) of the component (a2), and the content (mass%) of the component (a3). %) And the mass ratio [a2 / (a1 + a2 + a3 + a4)] to the content (mass%) of the component (a4) is 0.60 to 0.90.
The skin cleansing composition is characterized in that the mass ratio (D / E) of the component (D) to the component (E) is 0.5 to 150.
<2> The content of the component (A) is 30% by mass to 50% by mass.
The content of the component (B) is 1.5% by mass to 4% by mass.
The content of the component (C) is 15% by mass to 30% by mass.
The content of the component (D) is 0.2% by mass to 4% by mass.
The skin cleansing composition according to <1>, wherein the content of the component (E) is 0.03% by mass to 0.8% by mass.
<3> The skin cleansing composition according to any one of <1> to <2>, which is used in hard water having a hardness of 121 mg / L or more.
<4> The skin cleansing composition according to any one of <1> to <3>, wherein the gloss-imparting agent of the component (B) is an ester of glycols and stearic acid.

According to the present invention, the above-mentioned problems in the prior art can be solved, the above-mentioned object can be achieved, foaming in hard water is quick, the amount of foam in hard water is abundant, and when rinsing with hard water, it is washed cleanly without sliminess. It is possible to provide a skin cleansing composition which gives a finished feeling, does not have a sticky feeling or a taut feeling on the skin after drying, and has good appearance stability.

(Skin cleansing composition)
The skin cleansing composition of the present invention comprises (A) a fatty acid salt, (B) a gloss-imparting agent, (C) a polyhydric alcohol, (D) polyethylene glycol, and (E) a copolymer of dimethyldiallylammonium chloride and acrylamide. It contains coalescing and, if necessary, other components.

<(A) Fatty acid salt>
The fatty acid salt as the component (A) is contained for the purpose of improving the speed of foaming in hard water and the amount of foam in hard water.
The fatty acid salt of the component (A) contains a neutralized product of (a1) lauric acid, (a2) myristic acid, (a3) palmitic acid, (a4) stearic acid, and (a5) a basic compound, and further. It contains other ingredients as needed.

The base compound of the component (a5) is not particularly limited as long as it can form the fatty acid salts of the above (a1) to (a4), and can be appropriately selected depending on the intended purpose. Examples thereof include hydroxides of alkali metals such as potassium, amines, and amino acid salts. Among these, alkali metal hydroxides are preferable, and potassium hydroxide is more preferable, because the amount of bubbles in hard water is excellent.
The amine is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include ammonium and alkanolamine. Examples of the alkanolamine include monoethanolamine, diethanolamine, triethanolamine, 2-amino-2-methylpropanol, 2-amino-2-methylpropanediol and the like.
The amino acid salt is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include lysine salt and arginine salt. Examples of the salt include alkali metals and the like.
As the fatty acid salt of the component (A), a commercially available product may be used, or a product prepared by neutralizing a higher fatty acid with the basic compound may be used.

The content of the fatty acid salt of the component (A) is such that the speed of foaming in hard water, the amount of foam in hard water, the lack of tautness of the skin after drying, and the appearance stability can be obtained. It is preferably 20% by mass to 60% by mass, more preferably 30% by mass to 50% by mass, based on the total amount of the cleaning agent composition. If the content of the component (A) is less than 20% by mass, the speed of foaming in hard water and the amount of foam in hard water may be insufficient, and if it exceeds 60% by mass, after drying. The skin may not feel taut and the appearance stability may be insufficient.

The content of the component (a1) is preferably 0.5% by mass to 10% by mass, more preferably 2% by mass to 6% by mass, based on the total amount of the skin cleansing composition. The content of the component (a2) is preferably 10% by mass to 40% by mass, more preferably 15% by mass to 30% by mass, based on the total amount of the skin cleansing composition. The content of the component (a3) is preferably 0.5% by mass to 5% by mass, more preferably 2% by mass to 4% by mass, based on the total amount of the skin cleansing composition. The content of the component (a4) is preferably 0.5% by mass to 5% by mass, more preferably 2% by mass to 4% by mass, based on the total amount of the skin cleansing composition. When the contents of the component (a1), the component (a2), the component (a3), and the component (a4) are out of the numerical range, the speed of foaming in hard water and the amount of foam in hard water , And the lack of firmness of the skin after drying may be insufficient.
The content of the component (a5) can be stoichiometrically neutralized by 90% or more of the component (a1), the component (a2), the component (a3), and the component (a4). It may contain the amount.

-Mass ratio [a2 / (a1 + a2 + a3 + a4)]-
The content (mass%) of the component (a2), the content (mass%) of the component (a1), the content (mass%) of the component (a2), and the content (mass%) of the component (a3). %) And the mass ratio [a2 / (a1 + a2 + a3 + a4)] to the content (mass%) of the component (a4), such as the speed of foaming in hard water, the lack of tension of the skin after drying, and the appearance. From the viewpoint of obtaining stability, it is 0.60 to 0.90, preferably 0.65 to 0.8. If the mass ratio [a2 / (a1 + a2 + a3 + a4)] is less than 0.60, the speed of foaming in hard water and the lack of firmness of the skin after drying may be insufficient, and 0.90. If it exceeds, the appearance stability may deteriorate.
The fatty acid salt of the component (A) can be blended as each fatty acid salt, but each fatty acid and a base such as potassium hydroxide are separately added to the blending tank and neutralized to form a fatty acid salt. You can also do it.

<(B) Gloss imparting agent>
The gloss-imparting agent (also referred to as "brightening agent", "pearl-imparting agent", "pearlizing agent", etc.) as the component (B) imparts a pearl-like gloss to the skin cleansing composition. Included for the purpose. This is advantageous in that the commercial value can be increased.

The gloss-imparting agent of the component (B) is not particularly limited, and a gloss-imparting agent usually used in a skin cleansing composition can be used, for example, an ester of glycols and stearic acid. Can be mentioned. Examples of the glycols include ethylene glycol, diethylene glycol, triethylene glycol and the like.
Examples of the ester of glycols and stearic acid include ethylene glycol monostearate, ethylene glycol distearate, diethylene glycol monostearate, diethylene glycol disstearate, triethylene glycol monostearate, and triethylene glycol disstearate. Can be mentioned. These may be used alone or in combination of two or more. Among these, ethylene glycol distearate is preferable from the viewpoint of obtaining a feeling that the product has been washed cleanly without being slimy when rinsing with hard water and the appearance stability.

By generally dispersing the component (B) as a crystal in the skin cleansing composition, a pearl-like luster can be imparted to the skin cleansing composition.
The method for preparing the dispersion liquid of the crystal is not particularly limited and may be appropriately selected depending on the intended purpose. For example, the component (B) is melted and kept above the melting point of the component (B). Examples thereof include a method in which the component (B) is dispersed and mixed in the aqueous surfactant solution and cooled.

The content of the component (B) is 1% by mass with respect to the total amount of the skin cleansing composition, from the viewpoint of imparting a pearl appearance and giving a feeling that the skin has been washed cleanly without being slimy when rinsed with hard water. It is preferably ~ 5% by mass, more preferably 1.5% by mass to 4% by mass. If the content of the component (B) is less than 1% by mass, the appearance of the pearl may be insufficient, and if it exceeds 5% by mass, there is no slimy feeling when rinsing with hard water and the pearl is washed cleanly. May not be obtained.

<(C) Multivalent alcohol>
The polyhydric alcohol as the component (C) is contained in order to impart a lack of tension to the skin after drying.
The polyhydric alcohol of the component (C) is at least one selected from propylene glycol, sorbitol, ethylene glycol, glycerin, and 1,3-butylene glycol. These may be used alone or in combination of two or more.
The content of the component (C) is 10% by mass with respect to the total amount of the skin cleansing composition, from the viewpoint that a sticky feeling of the skin after drying and a non-tight feeling of the skin after drying can be obtained. It is preferably ~ 35% by mass, more preferably 15% by mass to 30% by mass. If the content of the component (C) is less than 10% by mass, the dry skin may feel taut, and if it exceeds 35% by mass, the dry skin may feel sticky. There is.

<(D) Polyethylene glycol>
The polyethylene glycol as the component (D) is contained for the purpose of improving the lack of tension of the skin after drying and the appearance stability.
The polyethylene glycol (hereinafter, may be referred to as “PEG”) as the component (D) has an average molecular weight of 900 to 12,500. For example, polyethylene glycol 1000 (average molecular weight 900 to 1,050) and polyethylene. Glycol 1500 (equal mixture of polyethylene glycol 300 and polyethylene glycol 1,540), polyethylene glycol 1540 (average molecular weight 1,290 to 1,650), polyethylene glycol 2000 (average molecular weight 1,850 to 2,150), polyethylene Glycol 4000 (average molecular weight 2,600 to 3,800), polyethylene glycol 6000 (average molecular weight 7,300 to 9,300), polyethylene glycol 11000 (average molecular weight 9,300 to 12,500) and the like can be mentioned.

In the present invention, the average molecular weight of polyethylene glycol can be measured according to an average molecular weight test of polyethylene glycol 1000 or the like listed in the Pharmaceutical Affairs Standards 2006 (Yakuji Nippo). Further, depending on the product, for example, polyethylene glycol # 1000 may have a # between the polyethylene glycol and the numerical value.

The content of polyethylene glycol as the component (D) includes the feeling that the skin has been washed cleanly without being slimy when rinsed with hard water, the skin does not feel taut after drying, and the skin does not feel sticky after drying. From the viewpoint of appearance stability, 0.1% by mass to 5% by mass is preferable, and 0.2% by mass to 4% by mass is more preferable with respect to the total amount of the skin cleansing composition. If the content of the component (D) is less than 0.1% by mass, the skin may not feel taut after drying and the appearance stability may be insufficient. If it exceeds 5% by mass, the content may be insufficient. When rinsing with hard water, the feeling that the skin is not slimy and has been washed cleanly, and the feeling that the skin is not sticky after drying may be insufficient.

<(E) Copolymer composed of dimethyldiallyl ammonium chloride and acrylamide>
The copolymer composed of dimethyldiallylammonium chloride and acrylamide as the component (E) (hereinafter, may be referred to as "dimethyldiallylammonium chloride-acrylamide copolymer") foams quickly in hard water and in hard water. It is contained for the purpose of improving the feeling that the product has been washed cleanly without being slimy during rinsing.

The copolymer composed of dimethyldiallylammonium chloride and acrylamide, which is the component (E), is obtained by copolymerizing dimethyldialylammonium chloride and acrylamide.
As the copolymer composed of dimethyldiallylammonium chloride and acrylamide of the component (E), the copolymer represented by the following general formula (1) is suitable.
However, in the general formula (1), m and n indicate the molar ratio (m: n) of each monomer unit, and the molar ratio (m: n) is preferably 10:90 to 40:60, and 15 : 85-35: 65 is more preferable. If the molar ratio is out of the numerical range, the speed of foaming in hard water, the amount of foam in hard water, and the appearance stability may be insufficient.

As the copolymer of the component (E), one type of copolymer having a specific molar ratio may be used alone, or two or more types of copolymers having different molar ratios may be used in combination. Further, as the copolymer of the component (E), a powder containing only the copolymer or a solution dissolved or dispersed in a solvent (water, alcohol, polyhydric alcohol, etc.) may be used.

The ratio of dimethyldiarylammonium chloride to acrylamide in the copolymer of the component (E) can be determined by measuring under the following measurement conditions by nuclear magnetic resonance (NMR).
[Measurement condition]
Solvent: heavy water (D ₂ O)
Measuring instrument: JNM-LA300 (300MHz, manufactured by JEOL Ltd.)

The weight average molecular weight of the copolymer of the component (E) is not particularly limited and may be appropriately selected depending on the intended purpose, but the speed of foaming in hard water, the amount of foam in hard water, and rinsing in hard water. It is preferably 90,000 to 2,600,000, more preferably 120,000 to 2,200,000, from the viewpoint of the feeling that the washing is finished cleanly without being slimy at times and the appearance stability. If the weight average molecular weight is less than 90,000, the speed of foaming in hard water and the amount of foam in hard water are insufficient, and if it exceeds 2,600,000, it can be washed cleanly without sliminess when rinsing with hard water. The actual feeling may not be obtained, and the appearance stability may deteriorate.
The weight average molecular weight of the copolymer of the component (E) can be measured by a gel permeation chromatograph / multi-angle laser light scattering detector (GPC-MALLS) under the following measurement conditions.
[Measurement condition]
Mobile phase: 0.3 mol / L NaClO ₄ , NaN ₃ aqueous solution Column: TSKgelα-M (manufactured by Tosoh Corporation) 2 Pre-column: TSKguardcolumn α (manufactured by Tosoh Corporation)
Standard substance: Polyethylene glycol

The viscosity of the copolymer solution of the component (E) at 25 ° C. indicates the speed of foaming in hard water, the amount of foam in hard water, the feeling that it has been washed cleanly without sliminess when rinsing in hard water, and the appearance is stable. From the viewpoint of properties, the solid content of the copolymer is preferably 150 mPa · s to 500 mPa · s in a 4% by mass aqueous solution. With a solid content of 5.5% by mass, 2,000 mPa · s to 3,000 mPa · s is preferable. With a solid content of 6% by mass, 2,000 mPa · s to 5,000 mPa · s is preferable. With a solid content of 8.5% by mass to 9.5% by mass, 7,500 mPa · s to 15,000 mPa · s is preferable. With a solid content of 41% by mass to 45% by mass, 1,200 mPa · s to 4,500 mPa · s is preferable.
The viscosity can be measured using, for example, a viscometer BM type (manufactured by Tokyo Keiki Co., Ltd.), a digital viscometer RVF (manufactured by Brookfield Co., Ltd.), or the like.

As the copolymer of the component (E), a commercially available product can be used, and examples of the commercially available product include the following.

・ Ultimer CG-600 (manufactured by Narco Japan Co., Ltd.)
Dimethyldiallyl ammonium chloride: acrylamide molar ratio = 30: 70, weight average molecular weight 2,200,000, raw material concentration: solid content 100% by mass, 25 ° C, 6% by mass aqueous solution viscosity 2,000 mPa · s ~ 5,000 mPa・ S.
For the viscosity, for example, a viscometer BM type (manufactured by Tokyo Keiki Co., Ltd.) was used to obtain No. Using the rotor of 4, measurement can be performed under the condition of 30 rotations / minute and 1 minute.

・ Kayakrill Resin M-50A (manufactured by Nippon Kayaku Co., Ltd.)
Dimethyldiallyl ammonium chloride: acrylamide molar ratio = 19:81, weight average molecular weight 1,800,000, raw material concentration: solid content 100% by mass, 25 ° C, 5.5% by mass aqueous solution viscosity 2,000 mPa · s-3 It is 000 mPa · s.
For the viscosity, for example, a viscometer BM type (manufactured by Tokyo Keiki Co., Ltd.) was used to obtain No. Using the rotor of 3, measurement can be performed under the conditions of 30 rotations / minute and 20 seconds.

・ Marurt 550 (manufactured by Lubrizol)
Dimethyldiallyl ammonium chloride: acrylamide molar ratio = 30: 70, weight average molecular weight 1,600,000, raw material concentration: solid content 8.5% by mass to 9.5% by mass, 25 ° C., raw material viscosity 7,500 mPa. It is s to 15,000 mPa · s.
For the viscosity, for example, a digital viscometer RVF (manufactured by Brookfield) was used to determine the viscosity of the spindle No. It can be measured under the condition of 10 rotations / minute using the rotor of 4.

・ Marurt 740 (manufactured by Ruble Zor)
Dimethyldiallyl ammonium chloride: molar ratio with acrylamide = 24: 76, weight average molecular weight 1,200,000, raw material concentration: solid content 41% by mass to 45% by mass, 25 ° C., raw material viscosity 1,200 mPa · s to 4 , 500 mPa · s.
For the viscosity, for example, a digital viscometer RVF (manufactured by Brookfield) was used to determine the viscosity of the spindle No. It can be measured under the condition of 10 rotations / minute using the rotor of 3.

・ Marurt S (manufactured by Lubrizol)
Dimethyldiallyl ammonium chloride: acrylamide molar ratio = 30: 70, weight average molecular weight 2,600,000, raw material concentration: solid content 8.5% by mass to 9.5% by mass, 25 ° C., raw material viscosity 9,000 mPa. It is s to 15,000 mPa · s.
For the viscosity, for example, a digital viscometer RVF (manufactured by Brookfield) was used to determine the viscosity of the spindle No. It can be measured under the condition of 10 rotations / minute using the rotor of 4.

・ Marurt 2200 (manufactured by Lubrizol)
Dimethyldiallyl ammonium chloride: acrylamide molar ratio = 30: 70, weight average molecular weight 900,000, raw material concentration: solid content 100% by mass, viscosity at 25 ° C., 4% by mass aqueous solution of 150 mPa · s to 500 mPa · s.
For the viscosity, for example, a digital viscometer RVF (manufactured by Brookfield) was used to determine the viscosity of the spindle No. It can be measured under the condition of 12 rotations / minute using the rotor of 2.

Among these, the solid content is 8.5% by mass or more in that it foams quickly in hard water, the amount of foam in hard water, the feeling that it has been washed cleanly without stickiness when rinsing with hard water, and the appearance stability is excellent. Marcourt 550 with a viscosity of 9.5% by mass and a viscosity at 25 ° C of 7,500 mPa · s to 15,000 mPa · s, and a solid content of 41% by mass to 45% by mass and a viscosity at 25 ° C of 1,200 mPa · s. Marcourt 740, which is ~ 4,500 mPa · s, is preferable.

The content of the copolymer of the component (E) is as follows: the speed of foaming in hard water, the amount of foam in hard water, and the feeling that the product has been washed cleanly without being slimy when rinsed with hard water. It is preferably 0.01% by mass to 1% by mass, more preferably 0.03% by mass to 0.8% by mass, based on the total amount of the skin cleansing composition. If the content is less than 0.01% by mass, the speed of foaming in hard water and the feeling that the product has been washed cleanly without being slimy when rinsing with hard water may be insufficient, and 1% by mass. If it exceeds, the speed of foaming in hard water and the amount of foam in hard water may be insufficient.

-Mass ratio (D / E)-
The mass ratio (D / E) of the polyethylene glycol of the component (D) to the copolymer of the component (E) is determined by the speed of foaming in hard water, the amount of foam in hard water, and the time of rinsing in hard water. It is 0.5 to 150, preferably 1 to 120, from the viewpoint that a feeling of being washed cleanly without being slimy can be obtained. If the mass ratio (D / E) is less than 0.5, the speed of foaming in hard water and the amount of foam in hard water may be insufficient, and if it exceeds 150, rinsing with hard water. Occasionally, there is no sliminess and the feeling of having finished washing cleanly may be insufficient.

<Other ingredients>
In addition to the above components (A) to (E), the skin cleansing composition of the present invention may contain other components as necessary without impairing the effects of the present invention. ..
Examples of the other components include oils, alcohols, moisturizers, thickeners, preservatives, antioxidants, chelating agents, pH adjusters, UV absorbers, UV scatterers, vitamins, amino acids, and fragrances. , Pigments and the like. These may be used alone or in combination of two or more.

Examples of the oil include vegetable fats and oils such as castor oil, olive oil, cacao oil, hardened palm oil, camellia oil, palm oil, wax, jojoba oil, grape seed oil, and avocado oil, and ester compounds thereof; mink oil, Animal oils and fats such as egg yolk oil; waxes such as beeswax, whale wax, lanolin, hydrogenated lanolin, carnauba wax, candelilla wax; hydrocarbons such as liquid paraffin, squalane, microcrystallin wax, ceresin wax, paraffin wax, and vaseline. Natural and synthetic fatty acids other than the above-mentioned components (a1) to (a4) such as capric acid, capric acid, arachidic acid, behenic acid, oleic acid, isostearic acid, and behenic acid up to about 0.5%; glycerol tri- Esters such as 2-ethylhexanoic acid ester, 2-ethylhexyl stearate, butyl stearate, isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, octyldodecyl oleate, cholesterol oleate; dimethylpolysiloxane and the like can be mentioned.

Examples of the alcohols include natural and synthetic higher alcohols such as cetyl alcohol, oleyl alcohol, stearyl alcohol, hexyldecanol, octyldodecanol, and lauryl alcohol.

The moisturizing agent is not particularly limited, and a known moisturizing agent other than the component (C) and the component (D) can be appropriately selected depending on the intended purpose. For example, isoprene glycol and 1,2-pentanediol. , Diethylene glycol, diethylene glycol monoalkyl ether, polypropylene glycol, polypropylene glycol, hardened castor oil (30EO), diglycerin, triglycerin, polyglycerin and the like. In addition, the said E. O. Represents the average number of moles of ethylene oxide (EO) added.

Examples of the thickener include semi-synthesis of natural polymers such as sodium alginate, xanthan gum, aluminum silicate, malmero seed extract, tragant gum and starch, and semi-synthesis of methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose and soluble starch. Examples thereof include synthetic polymer compounds such as polymers, carboxyvinyl polymers, polyvinyl alcohols, polyvinylpyrrolidones, polyacrylic acids, and methacryloyl ethylbetaine-methacrylate copolymers.

Examples of the preservative include benzoate, sorbate, dehydroacetate, paraoxybenzoic acid ester, 2,4,4'-trichloro-2'-hydroxydiphenyl ether, 3,4,4'-trichlorocarbani. Lido, benzalkonium chloride, hinokithiol, resorcin, methylchloroisothiazolinone / methylisothiazolinone solution (trade name: Kason CG; manufactured by Roam & Haas Japan), salicylic acid, pentandiol, phenoxyethanol, ethanol, etc. Be done.

Examples of the antioxidant include dibutylhydroxytoluene, butylhydroxyanisole, and ascorbic acid.
Examples of the chelating agent include disodium ethylenediaminetetraacetate, calcium disodium ethylenediaminetetraacetate, hexametaphosphate, and gluconic acid.
Examples of the pH adjuster include sodium hydroxide, potassium hydroxide, citric acid, succinic acid, triethanolamine, aqueous ammonia, triisopropanolamine, phosphoric acid, glycolic acid and the like.
Examples of the ultraviolet absorber and the ultraviolet scattering agent include 2-hydroxy-4-methoxybenzophenone, octyldimethylparaaminobenzoate, ethylhexylparamethoxycinnamate, titanium oxide, kaolin, talc and the like.
Examples of the vitamins include vitamin A, vitamin B group, vitamin C, vitamin D, vitamin E, vitamin F, vitamin K, vitamin P, vitamin U, carnitine, ferulic acid, γ-orizanol, α-lipoic acid, and the like. Examples thereof include ollotic acid and derivatives thereof.
Examples of the amino acids include glycine, alanine, valine, leucine, isoleucine, phenylalanine, tryptophan, cystine, cysteine, methionine, proline, hydroxyproline, aspartic acid, glutamic acid, arginine, histidine, lysine, or derivatives thereof. Can be mentioned.

Examples of the fragrance and the fragrance composition include the fragrance components described in paragraphs [0021] to [0035] of JP-A-2003-300817, and the fragrances described in paragraph [0050] of JP-A-2003-300811. Examples include a solvent for use. The fragrance composition is a mixture containing the fragrance component, a fragrance solvent, a fragrance stabilizer, and the like.
The content of the fragrance solvent in the fragrance composition is preferably 0.1% by mass to 99% by mass, more preferably 0.3% by mass to 50% by mass, based on the total amount of the fragrance composition.
Examples of the fragrance stabilizer include dibutylhydroxytoluene, butylhydroxyanisole, vitamin E or a derivative thereof, a catechin compound, a flavonoid compound, and a polyphenol compound. Of these, dibutylhydroxytoluene is preferable.
The content of the fragrance stabilizer in the fragrance composition is preferably 0.0001% by mass to 10% by mass, more preferably 0.001% by mass to 5% by mass, based on the total amount of the fragrance composition.
The content of the fragrance composition is preferably 0.005% by mass to 40% by mass, more preferably 0.01% by mass to 10% by mass, based on the total amount of the skin cleansing composition.

<Manufacturing method>
The method for producing the skin cleansing composition is not particularly limited and may be appropriately selected according to a conventional method. For example, the component (A), the component (B), the component (C), and the component (D). ), The component (E), and the other components, if necessary, can be mixed and produced.
When ethylene glycol fatty acid ester, polyethylene glycol fatty acid ester, etc. that are solid at room temperature are used as the component (B), the component (B) that is solid at room temperature is added at the time of producing the skin cleansing composition. By heating the entire skin cleansing composition, the component (B) is melted, and then the entire skin cleansing composition is cooled to generate crystals of the component (B), thereby producing gloss (pearl). It is preferable to give an appearance). The temperature at the time of heating and melting is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 70 ° C to 80 ° C. The temperature at the time of cooling is not particularly limited and may be appropriately selected depending on the intended purpose, but cooling can be performed at a cooling rate of 0.5 ° C./min to 1 ° C./min to 40 ° C. preferable.
Further, the skin cleansing composition may be produced by adding a dispersion liquid obtained by pre-crystallizing the component (B) to a composition in which a component other than the component (B) is mixed. As the dispersion liquid, the component (B) which is solid at room temperature may be previously crystallized in a solution such as a surfactant, or a commercially available product may be used.
The skin cleansing composition may be prepared using an apparatus. The device is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a stirrer having a shearing force and having a stirring blade capable of mixing the whole.
The stirring blade is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a propeller, a turbine and a dispar.

<pH>
The pH of the skin cleansing composition is not particularly limited and may be appropriately selected depending on the intended purpose, but from the viewpoint of appearance stability, it is preferably 8.5 to 10.0 at 25 ° C., 8 8.8 to 9.6 are more preferable.
When the pH is in the above range, there is no irritation to the skin and the appearance stability is good.
The pH can be measured at 25 ° C. using, for example, a glass electrode color hydrogen ion concentration indicator (HM-30R, manufactured by DKK-TOA CORPORATION, electrode type GST-5721).

<Drug type>
The dosage form of the skin cleansing composition is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include liquid and gel.

<Viscosity>
The viscosity of the skin cleansing composition is not particularly limited and may be appropriately selected depending on the intended purpose. However, the viscosity at 25 ° C. is that it does not easily spill when picked up, is easily applied to the skin, and is easily spread. However, 2,000 mPa · s to 200,000 mPa · s is preferable, 20,000 mPa · s-100,000 mPa · s is more preferable, and 30,000 to 80,000 mPa · s is particularly preferable.
The viscosity can be measured, for example, using a BH type viscometer (manufactured by Tokyo Keiki Co., Ltd.) under the conditions of No. 7 rotor, 25 ° C., 30 rpm, 20 seconds and the like.

<Container>
The skin cleansing composition is not particularly limited, and can be produced according to a conventional method of various dosage forms. Examples of the container for the skin cleaning agent composition include tubes such as aluminum laminated tubes, EVA tubes, aluminum tubes, and glass-deposited plastic tubes, as well as mechanical or differential pressure dispenser containers, squeeze containers, laminated film containers, and dropper containers. , Stick containers, bottle containers, etc. The laminated film container usually has two or more layers, and the material of the laminate includes, for example, polyethylene, polyethylene terephthalate, polyester, biaxially stretched polypropylene, unstretched polypropylene, polyacrylonitrile, and ethylene-vinyl acetate co-weight. Examples include synthetic resin such as coalescence, paper, and aluminum-deposited plastic. The laminated film container is generally of 2 to 5 layers in consideration of strength, flexibility, weather resistance and the like. Examples of the material of the bottle container include polyethylene, polypropylene, polyethylene terephthalate, polystyrene, polyvinyl chloride, ethylene-vinyl alcohol copolymer resin, acrylonitrile-styrene copolymer resin, ABS resin, polyamide, and glass. , These can be used as a single layer or in combination of two or more layers.

<Use>
The use of the skin cleansing composition is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include body shampoo, body soap, face wash foam, hand soap and foam hand soap. Among these, it is particularly suitable as a facial cleanser because it foams quickly in hard water, does not become slimy when rinsed in hard water, and has an excellent feeling of being washed cleanly, and does not give a feeling of tension to the skin after drying. is there.

Examples of the present invention will be described below, but the present invention is not limited to these examples. The contents of the skin cleansing composition described in the following Examples and Comparative Examples are all net conversion values.

(Examples 1-41 and Comparative Examples 1-18)
According to each composition and content (mass%) shown in the table below, the skin cleansing composition of Examples 1-41 and Comparative Examples 1-18 were prepared according to a conventional method.
Specifically, in order to first prepare the fatty acid salt of the component (A), the components (a1) to (a4) were uniformly dissolved in purified water preheated to 80 ° C. using a paddle type stirrer. At this time, the amount of purified water was adjusted so as to be 90% by mass of the whole. Subsequently, sodium hydroxide was added to obtain a fatty acid salt of the component (A). Next, the component (B), the component (C), the component (D), the component (E), and the common component were uniformly mixed. The mixture was then cooled to 40 ° C. at a cooling rate of 0.5 ° C./min. After cooling, the skin cleansing compositions of Examples 1 to 39 and Comparative Examples 1 to 18 adjusted the pH of the mixed solution to 9 using sodium hydroxide. In Example 40, the pH was adjusted to 8.5 using sodium hydroxide, and in Example 41, the pH was adjusted to 10.0 using sodium hydroxide. Finally, the remaining purified water was added, water was added so as to have a total content of 100% by mass, and the mixture was mixed to prepare the skin cleansing composition of Examples 1-41 and Comparative Examples 1-18.
The pH was measured at 25 ° C. using a pH meter (HM-30R, manufactured by DKK-TOA CORPORATION) in accordance with the pH measurement method of the quasi-drug raw material standard 2006 general test method.

<Evaluation>
Next, each of the obtained skin cleansing composition was "quickly foamed in hard water", "amount of foam in hard water", "feeling that it was washed cleanly without sliminess when rinsing with hard water", and "drying". The "non-sticky feeling of the skin afterwards", the "non-tight feeling of the skin after drying", the "pearl appearance", and the "appearance stability" were evaluated by the following methods. As the hard water, 0.007% by mass of calcium carbonate water (hardness: 175 mg / L) was used.

<<"Fastness of foaming in hard water" and "Amount of foam in hard water">>
Twenty specialized panels (10 men and 10 women) took 1 g of each skin cleansing composition after sufficiently moistening both hands with the hard water, rubbed both hands 20 times, and judged that "foaming was quick". Based on the following evaluation criteria, "quickness of foaming in hard water" and "amount of foam in hard water" were evaluated based on the number of people who performed the process and the number of people who judged that "the amount of foam was large".
In addition, the above-mentioned "fast foaming" means that the foaming is enough to overflow from the hands by eye measurement before rubbing both hands 20 times, and the above-mentioned "large amount of foaming" means when both hands are rubbed 20 times. , It means that it foams so much that it overflows from the hand by eye measurement.
[Evaluation criteria for the speed of foaming in hard water]
⊚: 16 or more out of 20 responded that “foaming was fast” ○: 11 or more and 15 or less out of 20 responded that “foaming was fast” △: 6 or more and 10 or less out of 20 However, 5 or less out of 20 responded that "foaming was fast". [Evaluation criteria for the amount of foam in hard water]
⊚: 16 or more out of 20 responded that “the amount of foam was large” ○: 11 or more and 15 or less out of 20 responded that “the amount of foam was large” △: 6 or more out of 20 10 Less than one person answered "a lot of bubbles" ×: 5 or less out of 20 people answered "a lot of bubbles"

<<"I feel like I've finished washing cleanly without getting slimy when rinsing with hard water">>
Twenty specialized panels (10 men and 10 women) took 1 g of each skin cleansing composition after sufficiently moistening both hands with the hard water, rubbed both hands 20 times, and then a flow rate of 2 L / min. Rinse with hard water for 1 minute, and evaluated "the feeling of having finished washing cleanly without sliminess when rinsing with hard water". Based on the following evaluation criteria, the number of people who judged that "there was no slimy feeling when rinsing and the feeling that the washing was finished cleanly" was evaluated as "the feeling that the washing was finished cleanly without sliminess when rinsing with hard water".
In addition, "the feeling that the skin was washed cleanly without being slimy when rinsing with hard water" refers to a state in which the skin is caught when the hands are rubbed when the skin cleansing composition is washed away. There is no sliminess when rinsing. "
[Evaluation criteria for the feeling that you have finished washing cleanly without getting slimy when rinsing with hard water]
◎: 16 or more out of 20 responded that "there is no slimy feeling when rinsing and I feel that I have finished washing cleanly." ○: 11 or more and 15 or less out of 20 respondents "wash cleanly without slimyness when rinsing.""I feel like I'm done" △: 6 to 10 out of 20 people answered "I feel like I've finished washing cleanly without getting slimy when rinsing" ×: 5 out of 20 people answered "I feel like I've finished washing cleanly without getting slimy when rinsing."

<<"No stickiness of the skin after drying" and "No tension of the skin after drying">>
Twenty specialized panels (10 men and 10 women) took 1 g of each skin cleansing composition after sufficiently moistening both hands with the hard water, rubbed both hands 20 times, and then washed the skin with hard water. Based on the following evaluation criteria, the number of people who rinsed the agent composition, dried it with towels, and judged that "the skin does not feel sticky after drying" and the number of people who judged that "the skin does not feel taut after drying""No stickiness of the skin after drying" and "No tension of the skin after drying" were evaluated.
[Evaluation criteria for non-greasy skin after drying]
⊚: 16 or more out of 20 responded that “the skin does not feel sticky after drying” ○: 11 or more and 15 or less out of 20 responded that “the skin does not feel sticky after drying” △: 6 to 10 out of 20 responded that "the skin does not feel sticky after drying" ×: 5 out of 20 responded that "the skin does not feel sticky after drying" Answered [Evaluation criteria for lack of tension on the skin after drying]
⊚: 16 or more out of 20 responded that "the skin does not feel taut after drying" ○: 11 or more and 15 or less out of 20 responded that "the skin does not feel taut after drying" △: 6 out of 20 people, 10 or less responded that "the skin does not feel taut after drying" ×: 5 out of 20 people answered that "the skin does not feel taut after drying" I answered

<<"Pearlappearance">>
Twenty specialized panels (10 males and 10 females) took 1 g of each skin cleansing composition in one hand, observed the skin cleansing composition, and judged that "pearl appearance is good". The "pearl appearance" was evaluated based on the evaluation criteria.
[Evaluation criteria]
⊚: 16 or more out of 20 responded that “pearl appearance is good” ○: 11 or more and 15 or less out of 20 responded that “pearl appearance is good” △: 6 or more out of 20 10 Less than one person answered "Pearl appearance is good" ×: 5 out of 20 people answered "Pearl appearance is good"

<<"Appearancestability">>
30 mL of each skin cleansing composition was placed in a 30 mL transparent glass container (SV-30, manufactured by Nichiden Rika Glass Co., Ltd.), covered, and allowed to stand at a temperature of 50 ° C. for 1 week. For each skin cleansing composition after one week, "appearance stability" was evaluated by one expert panel based on the following evaluation criteria.
[Evaluation criteria]
⊚: There is no change in appearance and separation is not observed. ○: Partial appearance is uneven in color tone, but separation is not observed. ×: Separation is observed.

The specific contents of the raw materials of the skin cleansing composition used in Examples 1 to 41 and Comparative Examples 1 to 18 are as shown in the table below.
* As the component (A), (a1) lauric acid, (a2) myristyl acid, (a3) palmitic acid, and (a4) stearic acid were neutralized with (a5) potassium hydroxide to prepare (a1). ~ (A4) potassium salt is contained.

The monomer content ratio (m: n) of the component (E) used in the examples is as shown in the table below.
The monomer content ratio of the comparative component (E) is as shown in the table below.
Note that the notes * 1 and * 2 in Tables 11 and 12 are as follows.
* 1: Brookfield Viscometer RVF (manufactured by Brookfield), Spindle No. 4, 60 rpm, 25 ° C
* 2: Brookfield Viscometer RVF (manufactured by Brookfield), Spindle No. 3,60 rpm, 25 ° C

The skin cleansing composition of the present invention foams quickly in hard water, has a large amount of foam in hard water, and gives the feeling that the skin has been washed cleanly without being slimy when rinsed with hard water, and is sticky to the skin after drying. Since it does not have a feeling of tension and tension and has good appearance stability, it is suitable for, for example, body soap, hand soap, foam hand soap, liquid hand soap, face wash, and kitchen hand soap.

Claims (4)

(A) (a1) lauric acid, (a2) myristic acid, (a3) palmitic acid, and (a4) stearic acid, a fatty acid salt that is a neutralized product of (a5) a basic compound.
(B) Gloss imparting agent,
(C) At least one polyhydric alcohol selected from propylene glycol, sorbitol, ethylene glycol, glycerin, and 1,3-butylene glycol.
It contains (D) at least one polyethylene glycol selected from polyethylene glycols having an average molecular weight of 900 to 12,500, and (E) a copolymer composed of dimethyldiallylammonium chloride and acrylamide.
The molar ratio of the dimethyldiallylammonium chloride to the acrylamide (dimethyldiallylammonium chloride: acrylamide) of the component (E) is 10:90 to 40:60.
The content of the component (A) is 20% by mass to 60% by mass.
The content of the component (B) is 1.5% by mass to 4% by mass.
The content of the component (C) is 10% by mass to 30% by mass.
The content of the component (D) is 0.1% by mass to 4% by mass.
The content of the component (E) is 0.03% by mass to 1% by mass.
The content (mass%) of the component (a2), the content (mass%) of the component (a1), the content (mass%) of the component (a2), and the content (mass%) of the component (a3). %) And the mass ratio [a2 / (a1 + a2 + a3 + a4)] to the content (mass%) of the component (a4) is 0.60 to 0.90.
A skin cleansing composition having a mass ratio (D / E) of the component (D) to the component (E) of 0.5 to 150. The content of the component (A) is 30% by mass to 50% by mass.
The content of the component (C) is 15% by mass to 30% by mass.
The content of the component (D) is 0.2% by mass to 4% by mass.
The skin cleansing composition according to claim 1, wherein the content of the component (E) is 0.03% by mass to 0.8% by mass. The content of the component (a1) is 0.5% by mass to 10% by mass.
The content of the component (a2) is 15% by mass to 30% by mass.
The content of the component (a3) is 1.8% by mass to 4% by mass.
The content of the component (a4) is 1.44% by mass to 4% by mass.
The content of the component (a5) can stoichiometrically neutralize the component (a1), the component (a2), the component (a3), and the component (a4) by 90% or more. The skin cleansing composition according to any one of claims 1 to 2, which is an amount. The skin cleansing composition according to any one of claims 1 to 3, wherein the pH at 25 ° C. is 8.5 to 10.0.