WO2017047238A1

WO2017047238A1 - Skin cleanser composition

Info

Publication number: WO2017047238A1
Application number: PCT/JP2016/071878
Authority: WO
Inventors: 香織渡部
Original assignee: ライオン株式会社
Priority date: 2015-09-18
Filing date: 2016-07-26
Publication date: 2017-03-23
Also published as: JPWO2017047238A1; JP6764413B2

Abstract

[Problem] To provide a skin cleanser composition which quickly produces a foam in hard water, produces a large amount of foam in hard water, provides a real sensation that the skin is completely cleansed without sliminess during rinsing with hard water, allows the skin after drying to be free from a feeling of stickiness and a feeling of tightness, and has good appearance stability. [Solution] The skin cleanser composition contains (A) a fatty acid salt, (B) a gloss-imparting agent, (C) a polyhydric alcohol, (D) polyethylene glycol, and (E) a copolymer of dimethyldiallyl ammonium chloride and acrylamide, wherein the mass ratio [a2/(a1 + a2 + a3 + a4)] of (a1) lauric acid, (a2) myristic acid, (a3) palmitic acid, and (a4) stearic acid which are contained in (A) is 0.60-0.90, and the mass ratio (D/E) of the component (D) and the component (E) is 0.5-150.

Description

Skin cleanser composition

The present invention relates to a skin cleanser composition.

Conventionally, a skin cleanser composition that contains a fatty acid salt, has good foaming, does not give a feeling of stickiness or firmness to the skin after drying, and can refresh the skin after washing (for example, Patent Document 1). However, when the skin cleanser composition is used in hard water containing a large amount of metal ions, a divalent metal ion such as calcium ion of hard water and a fatty acid salt are combined with each other during washing to produce a fatty acid metal salt. There are problems such as slow foaming and a feeling of tension on the dry skin.
For this reason, a skin cleanser composition containing a fatty acid salt, an amide ether derivative, and a metal sequestering agent has been proposed as a cleanser excellent in foaming and skin feel even in hard water (see, for example, Patent Document 2). However, in the above proposal, the amount of the conventional sequestering agent is limited depending on the type, and the amount of the compound that does not have an upper mixing limit is restricted from the viewpoint of the stability of the preparation and skin irritation. Therefore, the effect of the metal sequestering agent cannot be fully exhibited.

Moreover, in order to eliminate the dryness of the skin after drying, a detergent composition containing polyethylene glycol and a specific hypoallergenic surfactant has been proposed (see, for example, Patent Document 3 and Patent Document 4). . However, these proposals have a problem that they do not feel washed away due to the luster when rinsing.
Therefore, foaming with hard water is quick, the amount of foam in hard water is abundant, there is no stickiness when rinsing with hard water, the feeling that it has been washed cleanly is obtained, the skin after drying is not sticky, and there is no feeling of tension, It is strongly desired to provide a skin cleanser composition having good appearance stability.

International Publication No. 2004/098558 Pamphlet Japanese Patent Laid-Open No. 10-218758 JP 2001-072998 A JP-A-9-13096

An object of the present invention is to solve the above-described problems and achieve the following objects. That is, the present invention has a fast foaming with hard water, abundant amount of foam in hard water, a feeling of having been washed cleanly without lingering when rinsed with hard water, and a feeling of stickiness and tension on the skin after drying. There is provided a skin cleanser composition having good appearance stability.
Here, the said hard water refers to the water whose hardness is 121 mg / L or more. The hardness can be calculated by the following formula.
Hardness (mg / L) = [calcium amount (mg / L) × 2.5] + [magnesium amount (mg / L) × 4]

As a result of intensive studies by the present inventors to solve the above problems, (A) (a1) lauric acid, (a2) myristic acid, (a3) palmitic acid, and (a4) stearic acid, (a5) A fatty acid salt that is a neutralized product with a base compound, (B) a gloss-imparting agent, (C) at least one polyhydric alcohol selected from propylene glycol, sorbitol, ethylene glycol, glycerin, and 1,3-butylene glycol; (D) comprising at least one polyethylene glycol selected from polyethylene glycol having an average molecular weight of 900 to 12,500, and (E) a copolymer comprising dimethyldiallylammonium chloride and acrylamide. (A4) component, and a skin cleansing composition comprising the component (D) and the component (E) in a predetermined ratio Fast foaming with hard water, plenty of foam in hard water, no feeling of stickiness when rinsing with hard water, you can feel that it has been washed cleanly, there is no sticky feeling and firmness on the skin after drying, stable appearance It was found that the property is good.

This invention is based on the said knowledge by this inventor, and as a means for solving the said subject, it is as follows. That is,
<1> (A1) (a1) lauric acid, (a2) myristic acid, (a3) palmitic acid, (a4) stearic acid, and (a5) a fatty acid salt that is a neutralized product of 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;
(D) containing at least one polyethylene glycol selected from polyethylene glycol having an average molecular weight of 900 to 12,500, and (E) a copolymer consisting of dimethyldiallylammonium chloride and acrylamide,
Content (mass%) of component (a2), content (mass%) of component (a1), content (mass%) of component (a2), content (mass of component (a3) %), And the mass ratio [a2 / (a1 + a2 + a3 + a4)] to the content (% by mass) of the component (a4) is 0.60 to 0.90,
A skin cleanser composition, wherein a 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 cleanser 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 cleanser 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 conventional problems can be solved, the object can be achieved, the foaming with hard water is fast, the amount of foaming with hard water is abundant, and there is no luster when rinsing with hard water. It is possible to provide a skin cleanser composition that provides a finished feeling, has no stickiness and firmness on the dried skin, 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 co-polymer comprising dimethyldiallylammonium chloride and acrylamide. It contains a coalescence and further contains other components as required.

<(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 base compound, It contains other components as necessary.

The basic compound of the component (a5) is not particularly limited as long as it can form the fatty acid salts (a1) to (a4), and can be appropriately selected depending on the purpose. Examples thereof include alkali metal hydroxides such as potassium, amines, amino acid salts and the like. Among these, an alkali metal hydroxide is preferable and potassium hydroxide is more preferable in that the amount of foam in hard water is excellent.
There is no restriction | limiting in particular as said amine, According to the objective, it can select suitably, For example, ammonium, an alkanolamine, etc. are mentioned. Examples of the alkanolamine include monoethanolamine, diethanolamine, triethanolamine, 2-amino-2-methylpropanol, 2-amino-2-methylpropanediol, and the like.
There is no restriction | limiting in particular as said amino acid salt, According to the objective, it can select suitably, For example, a lysine salt, an arginine salt, etc. are mentioned. Examples of the salt include alkali metals.
As the fatty acid salt of the component (A), a commercially available product may be used, or a fatty acid prepared by neutralizing a higher fatty acid with the base compound may be used.

As the content of the fatty acid salt of the component (A), the speed of foaming in hard water, the amount of foam in hard water, the lack of skin tension after drying, and the appearance stability can be obtained. The amount is preferably 20% by mass to 60% by mass and more preferably 30% by mass to 50% by mass with respect to the total amount of the cleaning composition. When the content of the component (A) is less than 20% by mass, the speed of foaming with hard water and the amount of foam with hard water may become insufficient. When the content exceeds 60% by mass, There is a case where the skin does not feel tight and the appearance stability is insufficient.

The content of the component (a1) is preferably 0.5% by mass to 10% by mass, and more preferably 2% by mass to 6% by mass with respect to the total amount of the skin cleansing composition. The content of the component (a2) is preferably 10% by mass to 40% by mass and more preferably 15% by mass to 30% by mass with respect to the total amount of the skin cleansing composition. The content of the component (a3) is preferably 0.5% by mass to 5% by mass and more preferably 2% by mass to 4% by mass with respect to the total amount of the skin cleansing composition. The content of the component (a4) is preferably 0.5% by mass to 5% by mass and more preferably 2% by mass to 4% by mass with respect to the total amount of the skin cleansing composition. When the content of the component (a1), the component (a2), the component (a3), and the component (a4) is out of the numerical range, the speed of foaming in hard water, the amount of foam in hard water In addition, the dryness of the skin after drying may be insufficient.
The content of the component (a5) can neutralize the component (a1), the component (a2), the component (a3), and the component (a4) stoichiometrically by 90% or more. What is necessary is just to contain the quantity.

-Mass ratio [a2 / (a1 + a2 + a3 + a4)]-
Content (mass%) of component (a2), content (mass%) of component (a1), content (mass%) of component (a2), content (mass of component (a3) %), And the mass ratio [a2 / (a1 + a2 + a3 + a4)] to the content (mass%) of the component (a4), the speed of foaming in hard water, the lack of skin tightness after drying, and the appearance From the viewpoint of obtaining stability, it is 0.60 to 0.90, preferably 0.65 to 0.8. When the mass ratio [a2 / (a1 + a2 + a3 + a4)] is less than 0.60, the speed of foaming with hard water and the lack of tightness of the skin after drying may be insufficient. If it exceeds 1, 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 react with the fatty acid salt. You can also

<(B) Gloss imparting agent>
The gloss imparting agent (also referred to as “gloss agent”, “pearl imparting agent”, “pearling agent”, etc.) as the component (B) imparts a pearl-like gloss to the skin cleansing composition. Contains for purposes. 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 cleanser 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, and triethylene glycol.
Examples of the esters of glycols and stearic acid include ethylene glycol monostearate, ethylene glycol distearate, diethylene glycol monostearate, diethylene glycol distearate, triethylene glycol monostearate, triethylene glycol distearate and the like. Is mentioned. These may be used individually by 1 type and may use 2 or more types together. Among these, ethylene glycol distearate is preferable from the viewpoint of obtaining a feeling of having been washed cleanly without wiping when rinsed with hard water, and from the viewpoint of appearance stability.

The component (B) can impart a pearly luster to the skin cleansing composition by generally dispersing it as a crystal in the skin cleansing composition.
There is no restriction | limiting in particular as a method of preparing the dispersion liquid of the said crystal substance, According to the objective, it can select suitably, For example, melt | dissolve the said (B) component and hold | maintain more than melting | fusing point of the said (B) component. And a method of cooling the component (B) dispersed and mixed in the surfactant aqueous solution.

The content of the component (B) is 1% by mass with respect to the total amount of the skin cleanser composition because it gives a pearl appearance and gives a feeling of being washed clean without slickness when rinsed with hard water. Is preferably 5% by mass, more preferably 1.5% by mass to 4% by mass. When the content of the component (B) is less than 1% by mass, the pearl appearance may be insufficient. When it exceeds 5% by mass, it feels like it has been washed cleanly without being wet when rinsed with hard water. May not be obtained.

<(C) Polyhydric alcohol>
The polyhydric alcohol as the component (C) is contained in order to give the skin a dry feeling without being dry.
The polyhydric alcohol as 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 point that the feeling of stickiness of the skin after drying and the feeling of firmness of the skin after drying are obtained. Is preferably 35% by mass, more preferably 15% by mass to 30% by mass. When the content of the component (C) is less than 10% by mass, the skin after drying may have a tight feeling, and when it exceeds 35% by mass, the skin after drying may have a sticky feeling. There is.

<(D) Polyethylene glycol>
The polyethylene glycol as the component (D) is contained for the purpose of improving the stability of the appearance and the lack of firmness of the skin after drying.
The component (D) polyethylene glycol (hereinafter sometimes referred to as “PEG”) has an average molecular weight of 900 to 12,500, for example, polyethylene glycol 1000 (average molecular weight 900 to 1,050), polyethylene Glycol 1500 (equal mixture of polyethylene glycol 300 and polyethylene glycol 1,540), polyethylene glycol 1540 (average molecular weight 1,290-1,650), polyethylene glycol 2000 (average molecular weight 1,850-2,150), polyethylene And 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. .

In the present invention, the average molecular weight of polyethylene glycol can be measured in accordance with an average molecular weight test such as polyethylene glycol 1000 listed in Quasi-drug Raw Material Standard 2006 (Pharmaceutical Daily). Further, depending on the product, for example, there may be a # between the polyethylene glycol and the numerical value, such as polyethylene glycol # 1000.

As the content of the polyethylene glycol as the component (D), there is no feeling of stickiness when rinsing with hard water, the feeling that the skin has been washed cleanly, no feeling of the skin after drying, no feeling of stickiness of the skin after drying, and In terms of appearance stability, the content is preferably 0.1% by mass to 5% by mass and more preferably 0.2% by mass to 4% by mass with respect to the total amount of the skin cleansing composition. When the content of the component (D) is less than 0.1% by mass, the dryness of the skin after drying and the appearance stability may be insufficient. When the content exceeds 5% by mass, When rinsing with hard water, there may be insufficient feeling of stickiness of the skin after drying and the feeling that the skin has been washed cleanly.

<(E) Copolymer of Dimethyldiallylammonium Chloride and Acrylamide>
The copolymer of dimethyldiallylammonium chloride and acrylamide as the component (E) (hereinafter sometimes referred to as “dimethyldiallylammonium chloride-acrylamide copolymer”) is fast in foaming with hard water. It is contained for the purpose of improving the actual feeling of having been washed cleanly without lingering when rinsing.

The (E) component copolymer of dimethyldiallylammonium chloride and acrylamide is obtained by copolymerizing dimethyldiallylammonium chloride and acrylamide.
As the copolymer of component (E) consisting of dimethyldiallylammonium chloride and acrylamide, a copolymer represented by the following general formula (1) is suitable.

However, in the general formula (1), m and n represent the molar ratio (m: n) of each monomer unit, and the molar ratio (m: n) is preferably 10:90 to 40:60, : 85 to 35:65 is more preferable. When the molar ratio is outside the numerical range, the speed of foaming with hard water, the amount of foam with hard water, and the appearance stability may be insufficient.

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

The proportion of dimethyldiallylammonium chloride and acrylamide in the copolymer of 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 (300 MHz, manufactured by JEOL Ltd.)

The weight average molecular weight of the copolymer of component (E) is not particularly limited and may be appropriately selected depending on the intended purpose. However, the speed of foaming with hard water, the amount of foam with hard water, and rinsing with hard water 90,000 to 2,600,000 is preferable, and 120,000 to 2,200,000 is more preferable, from the viewpoint of the actual feeling of having been washed cleanly without occasional stickiness and appearance stability. If the weight average molecular weight is less than 90,000, the speed of foaming in hard water is insufficient and the amount of foam in hard water is insufficient, and if it exceeds 2,600,000, it can be washed cleanly without slickness when rinsed 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 with 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 Precolumn: TSKguardcolumn α (manufactured by Tosoh Corporation)
Reference material: Polyethylene glycol

The viscosity of the copolymer solution of the component (E) at 25 ° C. is the speed of foaming with hard water, the amount of foam in hard water, the feeling of being washed cleanly without slickness when rinsed with hard water, and the appearance stability From the viewpoint of properties, 150 mPa · s to 500 mPa · s is preferable in a 4% by mass aqueous solution of the copolymer. A solid content of 5.5% by mass is preferably 2,000 mPa · s to 3,000 mPa · s. A solid content of 6% by mass is preferably 2,000 mPa · s to 5,000 mPa · s. A solid content of 8.5% to 9.5% by mass is preferably 7,500 mPa · s to 15,000 mPa · s. A solid content of 41 to 45% by mass is preferably 1,200 mPa · s to 4,500 mPa · s.
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) or the like.

Commercially available products can be used as the copolymer of the component (E), and examples of the commercially available products include the following.

-Ultimate CG-600 (manufactured by Nalco Japan)
Molar ratio of dimethyldiallylammonium chloride: acrylamide = 30: 70, weight average molecular weight 2,200,000, raw material concentration: solid content 100 mass%, 25 ° C., 6 mass% aqueous solution viscosity 2,000 mPa · s to 5,000 mPa -S.
The viscosity is, for example, No. using a viscometer BM type (manufactured by Tokyo Keiki Co., Ltd.). The measurement can be performed under the condition of 30 rpm / minute for 1 minute using 4 rotors.

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

・ Marcote 550 (manufactured by Lubrizol)
Molar ratio of dimethyldiallylammonium chloride: acrylamide = 30: 70, weight average molecular weight 1,600,000, raw material concentration: solid content 8.5 mass% to 9.5 mass%, 25 ° C., raw material viscosity 7,500 mPa · s to 15,000 mPa · s.
For example, the viscosity is measured using a digital viscometer RVF (manufactured by Brookfield) with a spindle No. Measurement can be performed under the condition of 10 revolutions / minute using 4 rotors.

・ Marcote 740 (made by Lubrizol)
Molar ratio of dimethyldiallylammonium chloride: acrylamide = 24: 76, weight average molecular weight 1,200,000, raw material concentration: solid content 41 mass% to 45 mass%, 25 ° C., raw material viscosity 1,200 mPa · s to 4 500 mPa · s.
For example, the viscosity is measured using a digital viscometer RVF (manufactured by Brookfield) with a spindle No. 3 rotors can be used, and measurement can be performed under conditions of 10 revolutions / minute.

・ Marcote S (made by Lubrizol)
Molar ratio of dimethyldiallylammonium chloride: acrylamide = 30: 70, weight average molecular weight 2,600,000, raw material concentration: solid content 8.5 mass% to 9.5 mass%, 25 ° C., raw material viscosity 9,000 mPa · s to 15,000 mPa · s.
For example, the viscosity is measured using a digital viscometer RVF (manufactured by Brookfield) with a spindle No. Measurement can be performed under the condition of 10 revolutions / minute using 4 rotors.

・ Marcote 2200 (manufactured by Lubrizol)
The molar ratio of dimethyldiallylammonium chloride: acrylamide = 30: 70, weight average molecular weight 900,000, raw material concentration: solid content 100% by mass, viscosity at 25 ° C., 4% by mass in an aqueous solution of 150 mPa · s to 500 mPa · s.
For example, the viscosity is measured using a digital viscometer RVF (manufactured by Brookfield) with a spindle No. Two rotors can be used, and measurement can be performed under the condition of 12 revolutions / minute.

Among these, the solid content is 8.5% by mass in terms of the speed of foaming with hard water, the amount of foam in hard water, the feeling of being washed clean without rinsing when rinsed with hard water, and the appearance stability. 9.5% by mass, a Marcoat 550 having 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. A marcoat 740 of ˜4,500 mPa · s is preferred.

As the content of the copolymer of the component (E), the speed of foaming in hard water, the amount of foam in hard water, and the point that a feeling of being washed cleanly without slickness at the time of rinsing with hard water can be obtained, The amount is preferably 0.01% by mass to 1% by mass and more preferably 0.03% by mass to 0.8% by mass with respect to the total amount of the skin cleansing composition. When the content is less than 0.01% by mass, the speed of foaming with hard water, and the actual feeling of being washed cleanly without slickness when rinsing with hard water may be insufficient. If it exceeds 1, 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) between the polyethylene glycol of the component (D) and the copolymer of the component (E) is the speed of foaming in hard water, the amount of foam in hard water, and the rinse in hard water It is 0.5 to 150, and preferably 1 to 120, from the point that a feeling of having been washed cleanly is obtained without being sticky. When 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. Occasionally, the feeling of having been washed cleanly without any sliminess may be insufficient.

<Other ingredients>
In addition to the components (A) to (E) described above, the skin cleansing composition of the present invention may contain other components as necessary within a range not impairing the effects of the present invention. .
Examples of the other components include oils, alcohols, humectants, thickeners, preservatives, antioxidants, chelating agents, pH adjusters, ultraviolet absorbers, ultraviolet scattering agents, vitamins, amino acids, and fragrances. And pigments. These may be used alone or in combination of two or more.

Examples of the oil component include castor oil, olive oil, cacao oil, hydrogenated palm oil, coconut oil, coconut oil, tree wax, jojoba oil, grape seed oil, avocado oil and the like, and ester compounds thereof; mink oil; Animal 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, microcrystalline wax, ceresin wax, paraffin wax, petrolatum Natural and synthetic fatty acids other than the components (a1) to (a4) such as caprylic acid, capric acid, arachidic acid, behenic acid, oleic acid, isostearic acid, behenic acid, etc. up to about 0.5%; 2-ethylhexanoate, 2-ethylhexyl stearate, steari Butyl, isopropyl myristate, isopropyl palmitate, octyldodecyl myristate, octyldodecyl oleate, esters such as cholesterol oleate; such as dimethylpolysiloxane.

Examples of the alcohols include natural and synthetic higher alcohols such as cetyl alcohol, oleyl alcohol, stearyl alcohol, hexyl decanol, octyl decanol, and lauryl alcohol.

The humectant is not particularly limited, and a known humectant other than the component (C) and the component (D) can be appropriately selected according to the purpose. For example, isoprene glycol, 1,2-pentanediol , Diethylene glycol, diethylene glycol monoalkyl ether, polypropylene glycol, polypropylene glycol, hydrogenated castor oil (30EO), diglycerin, triglycerin, polyglycerin and the like. Note that the E.I. O. Represents the average number of moles of ethylene oxide (EO) added.

Examples of the thickener include natural polymers such as sodium alginate, xanthan gum, aluminum oxalate, quince seed extract, tragacanth gum, starch, and semisynthetic compounds such as methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, carboxymethylcellulose, and soluble starch. Examples thereof include synthetic polymer compounds such as polymers, carboxyvinyl polymers, polyvinyl alcohol, polyvinylpyrrolidone, polyacrylic acid, and methacryloylethylbetaine-methacrylic acid ester copolymers.

Examples of the preservative include benzoate, sorbate, dehydroacetate, p-hydroxybenzoate, 2,4,4′-trichloro-2′-hydroxydiphenyl ether, 3,4,4′-trichlorocarbani Lido, benzalkonium chloride, hinokitiol, resorcin, methylchloroisothiazolinone / methylisothiazolinone solution (trade name: Caisson CG; manufactured by Rohm and Haas Japan), salicylic acid, pentanediol, phenoxyethanol, ethanol, etc. It is done.

Examples of the antioxidant include dibutylhydroxytoluene, butylhydroxyanisole, ascorbic acid and the like.
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 ultraviolet scattering agent include 2-hydroxy-4-methoxybenzophenone, octyldimethylparaaminobenzoate, ethylhexylparamethoxycynamate, titanium oxide, kaolin, and talc.
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-oryzanol, α-lipoic acid, Examples include orotic 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 ingredients described in paragraphs [0021] to [0035] of JP-A-2003-300811, and the fragrance described in paragraph [0050] of JP-A-2003-300811. Solvents 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, and more preferably 0.3% by mass to 50% by mass with respect to 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, a polyphenol compound, and the like. Among these, dibutylhydroxytoluene is preferable.
The content of the fragrance stabilizer in the fragrance composition is preferably 0.0001% by mass to 10% by mass, and more preferably 0.001% by mass to 5% by mass with respect to the total amount of the fragrance composition.
The content of the fragrance composition is preferably 0.005% by mass to 40% by mass and more preferably 0.01% by mass to 10% by mass with respect to the total amount of the skin cleanser composition.

<Manufacturing method>
There is no restriction | limiting in particular as a manufacturing method of the said skin cleansing composition, According to a conventional method, it can select suitably, For example, the said (A) component, the said (B) component, the said (C) component, the said (D ) Component, the component (E), and the other components as necessary.
As the component (B), when using a solid ethylene glycol fatty acid ester, polyethylene glycol fatty acid ester, or the like at room temperature, the component (B) solid at room temperature is added at the time of manufacturing 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 produce crystals of the component (B), thereby producing a glossy (pearly) It is preferable to impart a shape-like 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. Further, the temperature at the time of cooling is not particularly limited and may be appropriately selected depending on the intended purpose. preferable.
Moreover, you may manufacture the said skin cleansing composition by adding the dispersion liquid which crystallized the said (B) component previously to the composition which mixed components other than the said (B) component. As the dispersion, the component (B) that is solid at room temperature may be crystallized in advance in a solution such as a surfactant, or a commercially available product may be used.
The skin cleanser composition may be prepared using a device. There is no restriction | limiting in particular as said apparatus, According to the objective, it can select suitably, For example, there exists a shearing force and the stirring apparatus provided with the stirring blade which can mix the whole etc. are mentioned.
There is no restriction | limiting in particular as said stirring blade, According to the objective, it can select suitably, For example, a propeller, a turbine, a disper, etc. are mentioned.

<PH>
The pH of the skin cleansing composition is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 8.5 to 10.0 at 25 ° C. from the viewpoint of appearance stability. 8 to 9.6 is 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, for example, at 25 ° C. using a glass electrode color hydrogen ion concentration indicator (HM-30R, manufactured by Toa DKK Corporation, electrode type GST-5721).

<Dosage form>
There is no restriction | limiting in particular as a dosage form of the said skin cleansing composition, According to the objective, it can select suitably, For example, liquid form, a gel form, etc. are mentioned.

<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 less likely to spill when picked up and easily applied to the skin and stretched. However, it is preferably 2,000 mPa · s to 200,000 mPa · s, more preferably 20,000 mPa · s to 100,000 mPa · s, and particularly preferably 30,000 to 80,000 mPa · s.
The viscosity can be measured, for example, using a BH viscometer (manufactured by Tokyo Keiki Co., Ltd.) under the conditions of No. 7 rotor, 25 ° C., 30 rotations / minute, 20 seconds, and the like.

<Container>
The skin cleansing composition is not particularly limited and can be produced according to conventional methods of various dosage forms. Examples of the container for the skin cleanser composition include aluminum laminate tubes, EVAL tubes, aluminum tubes, glass-deposited plastic tubes and the like, as well as dispenser containers and squeeze containers by mechanical or differential pressure, laminate film containers, and dropper containers. , Stick containers, bottle containers and the like. The laminate film container usually has two or more layers. Examples of the laminate material include polyethylene, polyethylene terephthalate, polyester, biaxially stretched polypropylene, unstretched polypropylene, polyacrylonitrile, and ethylene-vinyl acetate copolymer. Examples thereof include synthetic resins such as coalescence, paper, and aluminum-deposited plastic. In consideration of strength, flexibility, weather resistance and the like, the laminate film container is generally a two- to five-layer container. 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 in a single layer or in combination of two or more layers.

<Application>
There is no restriction | limiting in particular as a use of the said skin cleansing composition, According to the objective, it can select suitably, For example, a body shampoo, a body soap, a face-wash foam, a hand soap, a foam hand soap, etc. are mentioned. Among these, it is particularly suitable as a cleanser for facial cleansing because it has excellent foaming speed in hard water and a feeling that it has been washed clean without lingering when rinsed with hard water, and does not cause a feeling of tension on 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. In addition, all content of the skin cleaning composition as described in the following Examples and Comparative Examples is a pure conversion value.

(Examples 1-41 and Comparative Examples 1-18)
According to each composition and content (mass%) shown in the following table, skin cleanser compositions of Examples 1-41 and Comparative Examples 1-18 were prepared according to a conventional method.
Specifically, first, in order to prepare the fatty acid salt of the component (A), the components (a1) to (a4) were uniformly dissolved in purified water previously heated to 80 ° C. using a paddle type stirrer. At this time, the amount of purified water was adjusted to 90% by mass of the whole. Subsequently, sodium hydroxide was added to obtain a fatty acid salt of component (A). Next, the component (B), the component (C), the component (D), the component (E), and the common component were uniformly mixed. Thereafter, the mixture was 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 were adjusted to pH 9 with 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, and water was added and mixed so that the total amount was 100% by mass to prepare skin cleansing compositions of Examples 1-41 and Comparative Examples 1-18.
The pH was measured at 25 ° C. using a pH meter (HM-30R, manufactured by Toa DKK Corporation) in accordance with the pH measurement method of the quasi-drug raw material standard 2006 general test method.

<Evaluation>
Next, for each of the obtained skin cleansing compositions, “fast foaming with hard water”, “amount of foam in hard water”, “actual feeling of having finished washing cleanly without slickness when rinsing with hard water”, “drying” The following methods were evaluated for “no feeling of stickiness after the skin”, “no feeling of firmness of the skin after drying”, “pearl appearance”, and “appearance stability”. In addition, 0.007 mass% calcium carbonate water (hardness: 175 mg / L) was used as hard water.

<<"Speed of foaming in hard water" and "Amount of foam in hard water">>
20 professional panelists (10 males and 10 females) wet their hands thoroughly with the hard water, and then take 1g of each skin cleanser composition and rub both hands 20 times. Based on the following evaluation criteria, “the speed of foaming with hard water” and “the amount of foam with hard water” were evaluated by the number of people who made it and the number of people who judged that “the amount of foam was large”.
The term “fast foaming” refers to foaming so that it overflows from the hands before rubbing both hands 20 times, and the term “the amount of foam is large” means that both hands are rubbed 20 times. , Refers to bubbles that overflow from the hands by eye measurement.
[Evaluation criteria for the speed of foaming in hard water]
◎: More than 16 out of 20 responded that “foaming was fast” ○: 11 to 15 out of 20 responded that “foaming was early” Δ: 6 to 10 out of 20 people However, 5 or less out of 20 responded that “foaming was fast” [Evaluation criteria for foam amount in hard water]
◎: More than 16 out of 20 responded that “the amount of foam is high” ○: 11 or more out of 20 people answered that “the amount of foam was large” △: 6 or more out of 20 people out of 10 Less than one person replied that “the amount of bubbles is large” ×: 5 or less of 20 people replied that “the amount of bubbles was large”

<<"A feeling of having finished washing cleanly without being wet when rinsing with hard water">>
20 specialist panels (10 men and 10 women) wet their hands thoroughly with the hard water, take 1 g of each skin cleanser composition, rub both hands 20 times, and then a flow rate of 2 liters per minute After rinsing with hard water for 1 minute, the “actual feeling of having been washed cleanly without lingering when rinsed with hard water” was evaluated. Based on the following evaluation criteria, the number of people who judged that “there was a feeling of having been washed cleanly without lingering when rinsing” was evaluated based on the following evaluation criteria.
In addition, the “feeling of having finished washing cleanly without lingering when rinsing with hard water” refers to a state where the skin is scratched when the hand is rubbed when the skin cleaning composition is washed away. "No slickness when rinsing".
[Evaluation criteria for actual feeling after washing with no water when rinsed with hard water]
◎: More than 16 out of 20 responded that they felt that they had been washed cleanly without rinsing when they were rinsed. △: 6 to 20 out of 20 people answered, “There is no feeling of slimy when rinsing, and I feel that I finished washing” ×: 5 or less of 20 people, "I feel like I've finished it clean without lingering when rinsing"

<<"Non-sticky skin after drying" and "Non-tacky skin after drying">>
20 specialist panels (10 men and 10 women) wet their hands thoroughly with the hard water, take 1 g of each skin cleanser composition, rub both hands 20 times, and then wash the skin with hard water According to the following evaluation criteria, the number of people who judged that `` the skin did not feel sticky after drying '' and the number of people judged that `` the skin did not feel sticky after drying '' Evaluation was made on “no skin stickiness after drying” and “no skin tension after drying”.
[Evaluation criteria for non-stickiness of skin after drying]
◎: More than 16 out of 20 responded that “the skin after drying is not sticky” ○: 11 or more of the 20 people answered that there was no stickiness on the skin after drying △: 6 to 10 out of 20 people replied that “the skin after drying is not sticky” ×: 5 or less of 20 people said that “the skin after drying was not sticky” Answered [Evaluation criteria for lack of dryness of skin after drying]
◎: More than 16 out of 20 responded that “the skin after drying has no feeling of tension” ○: More than 11 out of 20 persons answered that “the skin after drying did not have any feeling of tension” △: 6 or less of 20 people and 10 or less replied that “the skin after drying has no feeling of tension” ×: 5 or less of 20 people said that “the skin after drying has no feeling of tension” I answered

<<"Pearlappearance">>
According to the number of people who 20 professional panelists (10 men, 10 women) took 1 g of each skin cleanser composition in one hand and observed the skin cleanser composition, and judged that “pearl appearance was good”. Based on the evaluation criteria, “pearl appearance” was evaluated.
[Evaluation criteria]
◎: More than 16 out of 20 responded that “pearl appearance was good” ○: 11 or more out of 20 people answered “good pearl appearance” Δ: 6 or more out of 20 10 Less than one person replied that “pearl appearance is good” ×: 5 or less of 20 persons replied that “pearl appearance was good”

<<"Appearancestability">>
30 mL of each skin cleansing composition was placed in a 30 mL glass transparent container (SV-30, manufactured by Nidec Rika Glass Co., Ltd.), covered, and allowed to stand at a temperature of 50 ° C. for 1 week. About each skin cleaning composition after one week, one expert panel evaluated "appearance stability" based on the following evaluation criteria.
[Evaluation criteria]
◎: No change in appearance, no separation observed ○: Appearance is partially uneven in color tone, but no separation is observed ×: Separation is observed

The specific contents of the raw materials of the skin cleanser compositions used in Examples 1-41 and Comparative Examples 1-18 are as shown in the following table.

* (A) component was prepared by neutralizing (a1) lauric acid, (a2) myristic acid, (a3) palmitic acid, and (a4) stearic acid with (a5) potassium hydroxide, (a1) The potassium salt of (a4) is included.

The monomer content ratio (m: n) of the component (E) used in the examples is as shown in the following table.

Moreover, the monomer content ratio of the (E) comparative component is as shown in the following table.

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 rotations / minute, 25 ° C
* 2: Brookfield viscometer RVF (Brookfield), spindle no. 3, 60 rev / min, 25 ° C

The skin cleanser composition of the present invention has quick foaming in hard water, abundant foam amount in hard water, gives a feeling that it has been washed cleanly without any stickiness when rinsed with hard water, and is sticky on the skin after drying Since there is no feeling and tension, and appearance stability is good, it is suitable for body soap, hand soap, foam hand soap, liquid hand soap, face wash, kitchen hand soap and the like.

Claims

(A) (a1) lauric acid, (a2) myristic acid, (a3) palmitic acid, and (a4) a fatty acid salt that is a neutralized product of 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;
(D) containing at least one polyethylene glycol selected from polyethylene glycol having an average molecular weight of 900 to 12,500, and (E) a copolymer consisting of dimethyldiallylammonium chloride and acrylamide,
Content (mass%) of component (a2), content (mass%) of component (a1), content (mass%) of component (a2), content (mass of component (a3) %), And the mass ratio [a2 / (a1 + a2 + a3 + a4)] to the content (% by mass) of the component (a4) is 0.60 to 0.90,
A skin cleanser composition, wherein a mass ratio (D / E) of the component (D) to the component (E) is 0.5 to 150.
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 cleanser composition according to claim 1, wherein the content of the component (E) is 0.03% by mass to 0.8% by mass.