JP2017214327A - Liquid cleanser composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid skin cleanser composition which has excellent low temperature stability, forms a large amount of foam, is good in foam creaminess, no creaky feeling and no sliminess of the skin at the completion of rinsing and imparts a good moist feeling to skin after dried with towel.SOLUTION: There is provided a liquid skin cleanser composition which comprises (A) a higher fatty acid salt including a lauric acid salt, a myristic acid salt and a palmitic acid salt, (B) at least one cationic polymer selected from a dimethyldiallylammonium chloride polymer and a dimethyldiallylammonium chloride-acrylic acid copolymer, (C) phenoxyethanol and (D) at least one polyhydric alcohol selected from propylene glycol, dipropylene glycol and 1,3-butylene glycol.SELECTED DRAWING: None

Description

  The present invention relates to a liquid skin cleanser composition.

  Conventionally, liquid skin cleanser compositions such as hand soaps and body soaps have good foam performance such as a large amount of foam and creaminess of foam, and a good skin condition after washing. It is hoped to do. In particular, recently, there has been a strong demand for providing a liquid skin cleanser composition having a high moisturizing property that can impart a moist feeling to the skin after washing.

  In order to improve the condition of the skin after washing, for example, a liquid skin cleanser composition containing a fatty acid salt and a cationic polymer having a structural unit derived from dimethyldiallylammonium chloride has been proposed (for example, (See Patent Documents 1 to 4). However, in the above proposal, it is insufficient to provide both moist feeling to the skin after washing and low temperature stability which is storage stability at low temperature. Further, a liquid skin cleanser composition containing a fatty acid salt, a cationic polymer, an N-acyl amino acid salt, and glycerin has been proposed (see, for example, Patent Document 5). However, in the above proposal, since the content of the fatty acid salt is small, the amount of foam, the foam performance such as creaminess of foam, and the lack of wet skin at the end of rinsing are insufficient. Furthermore, the moist feeling of the skin after towel drying is not satisfactory.

  Therefore, it is a liquid skin cleanser that can satisfy all of the low temperature stability, the amount of foam, the creaminess of foam, the non-smoothness of the skin at the end of rinsing, and the moist feeling of the skin after towel drying. It is desirable to provide a composition.

JP 2006-56802 A Japanese Patent Laying-Open No. 2015-74621 JP 2002-12538 A Japanese Patent Laying-Open No. 2015-74696 Special table 2008-530152 gazette

  An object of the present invention is to solve the above-described problems and achieve the following objects. That is, the present invention is a liquid skin cleanser composition having excellent low-temperature stability, a large amount of foam, creaminess of foam, smoothness of the skin at the end of rinsing, and a moist feeling of the skin after towel drying The purpose is to provide goods.

  In order to solve the above-mentioned problems, the present inventors have made extensive studies and as a result, (A) a higher fatty acid salt, (B) a cationic polymer, (C) phenoxyethanol, and (D) a liquid containing a polyhydric alcohol. The skin cleanser composition has excellent low-temperature stability due to the synergistic effect of each component, high amount of foam, creaminess of foam, no skin stickiness at the end of rinsing, and moist skin after towel drying I found out that the feeling was excellent.

The present invention is based on the above findings by the present inventors, and means for solving the above problems are as follows. That is,
<1> (A) Higher fatty acid salt containing 10% by mass to 30% by mass of laurate, myristic acid salt, and palmitic acid salt,
(B) 0.2 mass% to 3 mass% of at least one cationic polymer selected from dimethyldiallylammonium chloride polymer and dimethyldiallylammonium chloride-acrylic acid copolymer;
(C) 0.1% to 1.5% by mass of phenoxyethanol, and (D) 5% to 20% by mass of at least one polyhydric alcohol selected from propylene glycol, dipropylene glycol, and 1,3-butylene glycol. Containing mass%,
The molar ratio of the structural unit derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer of the component (B) is 65 mol% or more,
The mass ratio (palmitate / phenoxyethanol) of the palmitate content (mass%) of the component (A) and the phenoxyethanol content (mass%) of the component (C) is 2 to 25. It is a liquid skin cleanser composition characterized by these.
<2> The liquid skin cleanser composition according to <1>, further including (E) monoethanolamine.
<3> (F) The liquid skin cleanser composition according to any one of <1> to <2>, further including a copolymer represented by the following general formula (2).
However, in the said General formula (2), n, m, and 1 show the molar ratio of a structural unit, it is n + m + 1 = 100, the said n is 0-34, the said m is 26.5-31, the said l is 35-70.

  According to the present invention, it is possible to solve the above-described problems and achieve the above-mentioned object, excellent in low-temperature stability, a large amount of foam, creamy properties of foam, and a smooth skin at the end of rinsing. It is possible to provide a liquid skin cleansing composition that has a good feeling of moisture and a moist feeling after towel drying.

(Liquid skin cleanser composition)
The liquid skin cleansing composition of the present invention contains (A) a higher fatty acid salt, (B) a cationic polymer, (C) phenoxyethanol, and (D) a polyhydric alcohol, (E) monoethanolamine, (F ) It is preferable to contain a copolymer, and it contains other components as required.

<(A) Higher fatty acid salt>
The higher fatty acid salt of the component (A) is contained in order to improve the amount of foam, the creaminess of the foam, and the non-smoothness of the skin at the end of rinsing.
The higher fatty acid salt of the component (A) contains laurate, myristate, and palmitate, and may contain other higher fatty acid salts such as stearate as necessary.

Examples of the counter ion of the higher fatty acid salt of the component (A) include alkali metal ions, ammonium ions, alkanolamines, and basic amino acids.
Examples of the alkali metal ions include sodium ions and potassium ions.
Examples of the alkanolamine include monoethanolamine, diethanolamine, triethanolamine, triisopropanolamine, 2-amino-2-methylpropanol, 2-amino-2-methylpropanediol, and the like.
Examples of the basic amino acid include lysine and arginine.
Among these, potassium ions are preferable from the viewpoint of the amount of foam and the creaminess of the foam.
The higher fatty acid salt of the component (A) is not particularly limited and can be blended as a higher fatty acid salt. However, higher fatty acid and salts such as potassium hydroxide, triethanolamine, monoethanolamine, etc. May be separately added to the compounding tank and neutralized to obtain a higher fatty acid salt.

  As the content of the higher fatty acid salt of the component (A), the low temperature stability, the amount of foam, the creaminess of the foam, the non-smooth skin at the end of rinsing, and the moist feeling of the skin after towel drying From the point, it is 10 mass%-30 mass% with respect to the whole quantity of the said liquid skin cleaning composition, and 20 mass%-30 mass% are preferable. When the content is less than 10% by mass, the amount of foam, the creaminess of the foam, and the lack of wet skin at the end of rinsing may be insufficient, and when the content exceeds 30% by mass. , Low temperature stability, and moisturized skin after towel drying may be insufficient.

  As content of the said laurate, 3 mass%-12 mass% are preferable with respect to the whole quantity of the said liquid skin cleaning composition, and 7 mass%-12 mass% are more preferable. As content of the said myristic acid salt, 4 mass%-14 mass% are preferable with respect to the whole quantity of the said liquid skin cleansing composition, and 8 mass%-14 mass% are more preferable. As content of the said palmitate, 1 mass%-7 mass% are preferable with respect to the whole quantity of the said liquid skin cleaning composition, and 3 mass%-7 mass% are more preferable. If the content of the laurate, myristate, and palmitate is out of the numerical range, the low temperature stability, the amount of foam, the creaminess of the foam, the skin at the end of rinsing There may be a lack of moisture and a moist feeling on the skin after towel drying.

The other higher fatty acid salts are not particularly limited as long as the effects of the present invention are not impaired, and can be appropriately selected according to the purpose, but stearates are preferable.
The content of the stearate is not particularly limited and may be appropriately selected depending on the intended purpose. However, the amount of foam and the low-temperature stability are high with respect to the total amount of the higher fatty acid salt. Therefore, 7 mass% or less is preferable. The lower limit of the stearate content is preferably 0% by mass.

<(B) Cationic polymer>
The cationic polymer of the component (B) is at least one selected from a dimethyldiallylammonium chloride polymer and a dimethyldiallylammonium chloride-acrylic acid copolymer, and improves the moist feeling of the skin after towel drying. Is contained for.

Of the components (B), the dimethyldiallylammonium chloride-acrylic acid copolymer is represented by the following general formula (1).
However, in the said General formula (1), n and m show the molar ratio (mol%) of each structural unit, it is n + m = 100, and the said m is 65 mol% or more.

  The molar ratio of the structural unit derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer in the component (B) is 65 mol% or more from the point of moist feeling of the skin after towel drying. Yes, 95 mol% is preferable. When the molar ratio is less than 65 mol%, the moist feeling of the skin after towel drying may be insufficient.

The molar ratio of the structural unit in the dimethyldiallylammonium chloride-acrylic acid copolymer in the component (B) can be determined by measurement 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.)

There is no restriction | limiting in particular as a weight average molecular weight of the cationic polymer of the said (B) component, Although it can select suitably according to the objective, From the point of the moist feeling of the skin after towel drying, 10,000-1 15,000,000 is preferable, and 15,000-450,000 is more preferable.
The weight average molecular weight of the cationic polymer of the component (B) is, for example, SEC-MALLS-RI system (measurement condition: column: TSKgel α series α-M column 30 cm manufactured by Tosoh Corporation, solvent: 0.3 M aqueous solution of sodium nitrate) Can be measured.

The viscosity at 25 ° C. of the copolymer solution having a solid content of 30% by mass to 44% by mass in the cationic polymer of the component (B) is 10 mPa · s to 15 in terms of moist feeling on the skin after towel drying. 2,000 mPa · s is preferable, and 20 mPa · s to 12,000 mPa · s is more preferable.
The viscosity can be measured, for example, using a Brookfield viscometer LVF (manufactured by Brookfield).

As the cationic polymer of the component (B), those appropriately synthesized may be used, or commercially available products may be used. Examples of the commercially available products include the following.
Marcote 100 (component name: dimethyldiallylammonium chloride polymer, manufactured by Lubrizol Corporation, solid content 39 mass% to 44 mass%, viscosity at 25 ° C .: 8,000 mPa · s to 12,000 mPa · s, weight average molecular weight: 150,000). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. with spindle no. Three rotors can be used and the measurement can be performed at a condition of 6 revolutions / minute.

  Marcoat 106 (component name: dimethyldiallylammonium chloride polymer, manufactured by Lubrizol Corporation, solid content of 30% to 36% by weight, viscosity at 25 ° C .: 20 mPa · s to 65 mPa · s, weight average molecular weight: 15,000) . The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. with spindle no. One rotor can be used and measurement can be performed at a condition of 60 revolutions / minute.

  Marquat 295 (component name: dimethyldiallylammonium chloride-acrylic acid copolymer, manufactured by Lubrizol Corporation, solid content 35 mass% to 40 mass%, viscosity at 25 ° C .: 3,500 mPa · s to 9,000 mPa · s, Weight average molecular weight: 190,000, n: m = 5: 95 (molar ratio) in the general formula (1), and the molar ratio of structural units derived from dimethyldiallylammonium chloride is 95 mol%. The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. with spindle no. Measurement can be performed at a condition of 30 revolutions / minute using four rotors.

  Marquat 280 (component name: dimethyldiallylammonium chloride-acrylic acid copolymer, manufactured by Lubrizol Corporation, viscosity at 25 ° C. with a solid content of 39 mass% to 43 mass%: 3,000 mPa · s to 6,000 mPa · s, Weight average molecular weight: 450,000, n: m in the general formula (1) = 35: 65 (molar ratio), and the molar ratio of structural units derived from dimethyldiallylammonium chloride is 65 mol%). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. with spindle no. Measurement can be performed at a condition of 60 revolutions / minute using four rotors.

  Among these, as the cationic polymer of the component (B), from the viewpoint of moist feeling of the skin after towel drying, the marcoat 100, the marcoat 106, and the marcoat 295 are preferable, and the marcoat 100 is more preferable.

  The content of the cationic polymer of the component (B) is 0. 0% relative to the total amount of the liquid skin cleanser composition from the viewpoint of the amount of foam and the moist feeling of the skin after towel drying. It is 2 mass%-3 mass%, and 0.3 mass%-1 mass% are preferable. When the content is less than 0.2% by mass, the moist feeling of the skin after towel drying may be insufficient. When the content exceeds 3% by mass, the amount of foam becomes insufficient. Sometimes.

<(C) Phenoxyethanol>
The component (C), phenoxyethanol, is contained to improve low-temperature stability.
The content of the phenoxyethanol as the component (C) is 0.1 mass with respect to the total amount of the liquid skin cleansing composition from the viewpoint of low temperature stability, a large amount of foam, and creamy property of foam. % To 1.5% by mass, preferably 0.3% to 1.2% by mass. When the content is less than 0.1% by mass, the low-temperature stability may be insufficient. When the content exceeds 1.5% by mass, the amount of foam and the creaminess of the foam are poor. May be sufficient.

[Mass ratio (palmitate / phenoxyethanol)]
The mass ratio (palmitate / phenoxyethanol) of the palmitate content (mass%) of the component (A) and the phenoxyethanol content (mass%) of the component (C) is low temperature. From the viewpoint of stability, a large amount of foam, and creamy properties of foam, it is 2 to 25, and 5 to 15 is preferable. If the mass ratio (palmitate / phenoxyethanol) is less than 2, the amount of foam and the creaminess of the foam may be insufficient, and if it exceeds 25, the low-temperature stability is insufficient. It may become.

<(D) Polyhydric alcohol>
The polyhydric alcohol as the component (D) is at least one selected from propylene glycol, dipropylene glycol, and 1,3-butylene glycol, and improves low temperature stability and moist feeling after towel drying. To contain.
The content of the polyhydric alcohol as the component (D) includes the liquid skin cleanser composition from the viewpoint of low temperature stability, a large amount of foam, creamy properties of foam, and moist feeling of the skin after towel drying. It is 5 mass%-20 mass% with respect to the whole quantity of a thing, and 8 mass%-15 mass% are preferable. When the content is less than 5% by mass, the low temperature stability and the moist feeling of the skin after towel drying may be insufficient. When the content exceeds 20% by mass, the amount of foam is large, and The creaminess of the foam may be insufficient.

<(E) Monoethanolamine>
The (E) component monoethanolamine is contained to improve low-temperature stability.
The monoethanolamine of the component (E) is contained when the content of the higher fatty acid salt of the component (A) is 20% by mass to 30% by mass with respect to the total amount of the liquid skin cleanser composition. It is preferred that
The content of monoethanolamine as the component (E) is 0. 0 with respect to the total amount of the liquid skin cleansing composition from the viewpoint of low temperature stability, a large amount of foam, and creamy property of foam. 1 mass%-1 mass% are preferable. When the content is less than 0.1% by mass, the effect of improving the low-temperature stability may be insufficient. When the content exceeds 1% by mass, the amount of foam and the creaminess of the foam are increased. It may be insufficient.

<(F) Copolymer>
As the copolymer of the component (F), a copolymer represented by the following general formula (2) is used in order to improve the smoothness of the skin during rinsing.
However, in the said General formula (2), n, m, and 1 show the molar ratio (mol%) of each structural unit, and is n + m + 1 = 100.
The n is preferably 0 to 34, the m is preferably 26.5 to 31, and the l is preferably 35 to 70.
Among these, the molar ratio (n: m: l) in the general formula (2) is preferably (0:30:70) from the viewpoint of the smoothness of the skin at the time of rinsing.

The molar ratio of each monomer in the copolymer of the component (F) 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.)

  There is no restriction | limiting in particular as a weight average molecular weight of the copolymer of the said (F) component, Although it can select suitably according to the objective, 100,000-3,000,000 are preferable, 150,000-1 600,000 is more preferable. The weight average molecular weight of the copolymer of the component (F) is, for example, SEC-MALLS-RI system (measurement conditions: column: TSKgel α series α-M column 30 cm, manufactured by Tosoh Corporation, solvent: sodium nitrate 0.3 M aqueous solution). Can be measured.

The viscosity at 25 ° C. of the copolymer solution having a solid content of 8% by mass to 45% by mass in the copolymer of the component (F) is not particularly limited and may be appropriately selected according to the purpose. 1,500 mPa · s to 16,000 mPa · s, and more preferably 7,500 mPa · s to 15,000 mPa · s.
The viscosity can be measured using a Brookfield viscometer LVF (manufactured by Brookfield).

As a copolymer of the said (F) component, what was synthesize | combined suitably may be used and a commercial item may be used. Examples of the commercially available products include the following.
Marquat 550PR (component name: dimethylallyl ammonium chloride-acrylamide copolymer, manufactured by Lubrizol Corporation, solid content of 8.8% by mass to 9.8% by mass, viscosity at 25 ° C .: 7,500 mPa · s to 15,000 mPa S, weight average molecular weight: 1,600,000, n: m: l = 0 in the general formula (2) = 0: 30: 70). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. with spindle no. Measurement can be performed under the condition of 10 revolutions / minute using 4 rotors.

  Marquat 3330PR (component name: acrylic acid-dimethyldiallylammonium chloride-acrylamide copolymer, manufactured by Lubrizol Corporation, solid content of 10.2% by mass to 11.5% by mass at 25 ° C .: 1,000 mPa · s— 6,000 mPa · s, weight average molecular weight: 1,500,000, n: m: l in the general formula (2) = 34: 31: 35). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. with spindle no. Measurement can be performed under the condition of 30 revolutions / minute using 4 rotors.

  Marquat 3331PR (component name: acrylic acid-dimethyldiallylammonium chloride-acrylamide copolymer, manufactured by Lubrizol Corporation, solid content 9.7% by mass to 10.7% by mass, viscosity at 25 ° C .: 2,000 mPa · s˜ 12,000 mPa · s, weight average molecular weight: 1,600,000, n: m: l = 22.5: 26.5: 51 in the general formula (2). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. with spindle no. Measurement can be performed at a condition of 30 revolutions / minute using 5 rotors.

  Marcote 3940 (component name: acrylic acid-dimethyldiallylammonium chloride-acrylamide copolymer, manufactured by Lubrizol Corporation, solid content 41 mass% to 45 mass%, viscosity at 25 ° C .: 1,500 mPa · s to 4,500 mPa · s, weight average molecular weight: 150,000, n: m: l in the general formula (2) = 31: 29: 40). The viscosity was measured using a Brookfield viscometer LVF (manufactured by Brookfield) at 25 ° C. with spindle no. 3 rotors can be used, and measurement can be performed under conditions of 10 revolutions / minute.

  Among these, as the copolymer of the component (F), Marcoat 550PR is preferable from the viewpoint of smooth skin during rinsing.

  The content of the copolymer of the component (F) includes the liquid skin cleansing composition from the viewpoints of a large amount of foam, no skin stickiness at the end of rinsing, and smooth skin at the time of rinsing. 0.2 mass%-3 mass% are preferable with respect to the whole quantity of a thing, and 0.2 mass%-1 mass% are more preferable. When the content is less than 0.2% by mass, the smoothness of the skin at the time of rinsing may be insufficient. When the content exceeds 3% by mass, the amount of foam and at the end of rinsing are increased. The skin may not be smooth enough.

<Other ingredients>
In addition to the components (A) to (F) described above, the liquid skin cleanser composition of the present invention may contain other components as necessary within a range not impairing the effects of the present invention. it can.
Examples of the other components include purified water, a cationic polymer of the component (B), a water-soluble polymer other than the copolymer of the component (F), alcohols such as oils, lower and higher alcohols, and lanolin. Derivatives, protein derivatives, acrylic resin dispersions, drugs such as vitamins, bactericides, preservatives, viscosity modifiers, pH adjusters, antioxidants, metal sequestering agents, ultraviolet absorbers, animal and plant extracts or their derivatives, pigments, Examples include fragrances, pigments, inorganic powders, clay minerals, water-insoluble polymer powders such as nylon and polyethylene. These may be used alone or in combination of two or more.

-Manufacturing method-
There is no restriction | limiting in particular as a manufacturing method of the liquid skin cleaning composition of this invention, According to the objective, it can select suitably, Said (A)-(F) component, As needed, said other component And the purified water (the remaining amount blended so that the entire liquid skin cleanser composition is 100% by mass) can be obtained by mixing.
Specifically, it can be produced as follows. After dissolving the polyhydric alcohol of the component (D) and the higher fatty acid salt of the component (A) in purified water heated to 70 ° C. to 80 ° C. and cooling to 40 ° C. or less, A cationic polymer, the phenoxyethanol of the component (C), and the monoethanolamine of the component (E) and a copolymer of the component (F) can be added as necessary.
The liquid 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 liquid skin cleansing composition at 25 ° C. is preferably 9.5 to 11.0, and more preferably 9.8 to 10.6, from the viewpoint of the amount of foam. When the pH value is in the numerical range, the amount of foam is good and there is no skin irritation.
The pH can be measured using, for example, a pH meter (HM-30R, manufactured by TOA DKK).

-Viscosity-
There is no restriction | limiting in particular as a viscosity in 25 degreeC of the said liquid skin cleaning composition, Although it can select suitably according to the objective, 1 mPa * s-6,000 mPa * s are preferable, 50 mPa * s-4, 000 mPa · s is more preferable.
The viscosity can be measured, for example, using a BM viscometer (manufactured by Tokyo Keiki Co., Ltd.) at a sample temperature of 25 ° C. under the following conditions. When the viscosity is 1 mPa · s to 3000 mPa · s, a BM adapter, a rotation speed of 30 rpm, No. When the viscosity after 1 minute was measured using a rotor No. 3 and exceeded 3,000 mPa · s, a BM adapter, a rotation speed of 30 rpm, No. 3 was used. It can be measured by measuring the viscosity after 1 minute with a rotor of 4.

-Container-
The liquid skin cleansing composition of the present invention is not particularly limited, and is used by filling a normal container.
There is no restriction | limiting in particular as said container, According to the objective, it can select suitably, For example, a pump dispenser container, a tube, a former container, a bag-like container, etc. are mentioned. Among these, a pump dispenser container is preferable. Examples of the pump dispenser container include a pump dispenser container having a nozzle diameter (inner diameter) of 3.5 mm and a discharge amount of 3 mL manufactured by Yoshino Kogyo Co., Ltd.

-Use-
The liquid skin cleanser composition of the present invention has low-temperature stability, a large amount of foam, good creaminess of foam, no moist skin at the end of rinsing, and moist feeling of the skin after towel drying For example, it is used for facial cleansing, hand soap, body soap, cleansing foam, makeup remover, etc., and particularly suitable for body soap.

  Hereinafter, the present invention will be described more specifically based on examples and comparative examples, but the present invention is not limited to the following examples. In addition, all the content of each component of description of an Example and a comparative example is the value converted into a pure part.

(Examples 1-30 and Comparative Examples 1-18)
Liquid skin cleansing compositions having the compositions and contents shown in Tables 1 to 8 below were prepared by a conventional method. Specifically, it was prepared by the following method.
Purified water in an amount of 95% by mass of the total amount of the liquid detergent composition to be finally obtained is heated to 70 ° C. to 80 ° C., (D) polyhydric alcohol, (A) higher fatty acid as component After dissolving the salt and the common component methacrylic acid-ethyl acrylate-butyl acrylate copolymer and cooling to 40 ° C. or lower, the (B) component cationic polymer, the (C) component phenoxyethanol, the common component A liquid skin cleanser composition was prepared by adding the perfume of After that, when the pH is less than the predetermined pH, the common component potassium hydroxide is added, adjusted to the predetermined pH, purified water is added so that the total amount becomes 100% by mass, and the intended liquid skin A cleaning composition was obtained. Moreover, a propeller was used as a stirring blade, and stirring was performed using a three-one motor (HEIDON BL1200, manufactured by Shinto Chemical Co., Ltd.). The pH was measured at 25 ° C. using a pH meter (HM-30R, manufactured by TOA DKK). Moreover, each liquid skin cleaning composition of obtained Examples 1-30 and Comparative Examples 1-18 is a container with a pump dispenser [discharge amount 3mL, nozzle aperture (inner diameter) 3.5mm, made by Yoshino Kogyo Co., Ltd. ].

  Next, for each of the obtained liquid skin cleansing compositions, “low temperature stability”, “large amount of foam”, “foam creaminess”, “rinse finish skin” “Non-smooth” and “moist skin feeling after towel drying” were evaluated. The results are shown in Tables 1 to 8 below.

<Low temperature stability>
50 mL of each liquid skin cleanser composition of Examples 1 to 30 and Comparative Examples 1 to 18 is placed in a 50 mL capacity transparent glass bottle (screw mouth bottle SV-50A, manufactured by Nidec Denka Glass Co., Ltd.), and the lid of the glass bottle is closed. And stored at −5 ° C. for 30 days. One expert panel visually observed the appearance of the stored liquid skin cleanser composition, and evaluated “low temperature stability” after 14 days storage and after 30 days storage according to the following evaluation criteria. In addition, the thing which produced the precipitation of the crystal | crystallization and solid after 14-day storage complete | finished storage in 14 days, and evaluated. Moreover, if evaluation is more than (circle), "low temperature stability" is favorable.
-Evaluation criteria for "low temperature stability"-
◎: No crystals or solids precipitated even after storage for 30 days ◎ to ○: No crystals or solids precipitated after storage for 14 days, very little crystals were observed between the 15th day and the 30th day Or, there was solid precipitation, but when it was returned to 25 ° C. after storage for 30 days, it dissolves uniformly within 5 minutes, so there is no problem in commercial value. ○: After storage for 14 days, very few crystals or solids precipitated However, there is no problem in commercial value because it dissolves uniformly within 5 minutes when it is returned to 25 ° C. Δ: There is a small amount of crystals or solids precipitated after storage for 14 days, and within 5 minutes even when it is returned to 25 ° C. In the product value, there is a large amount of crystals or solid precipitates after storage for 14 days, and even when the temperature is returned to 25 ° C., it does not dissolve uniformly within 5 minutes. There's a problem

<The amount of foam, creamy nature of foam>
Ten expert evaluators wet the 40 ° C warm water and lightly damp the nylon towel 2 pushes the liquid skin cleansing compositions of Examples 1-30 and Comparative Examples 1-18 (about 6g). Then, when the nylon towel was rubbed 10 times and foamed, the amount of foam and the creaminess of the foam were observed and evaluated according to the following evaluation criteria. As a result, an average evaluation score of the 10 expert evaluators was obtained, and “a large amount of foam” and “a creamy property of foam” were evaluated. In addition, if the average evaluation score is 3.0 points or more, the “large amount of foam” and the “creamy property of foam” are good.
-Evaluation criteria for "large amount of foam"-
5 points: Foam overflows from nylon towel 4 points: 70% to 100% of nylon towel is covered with foam 3 points: 50% to less than 70% of nylon towel is covered with foam 2 points: Nylon 20% or more and less than 50% of towels are covered with foam 1 point: Less than 20% of nylon towels are covered with foam or almost no foam-Evaluation criteria for "creamy property of foam"-
5 points: Most bubbles are fine bubbles and very creamy 4 points: Large bubbles are mixed in a part of fine bubbles, but creamy 3 points: Large bubbles are half in fine bubbles 2 points: Larger and more rough bubbles than fine bubbles, not creamy 1 point: Only large and coarse bubbles stand, not at all creamy

<Non-smooth skin at the end of rinsing>
Ten expert evaluators wet the 40 ° C warm water and lightly damp the nylon towel 2 pushes the liquid skin cleansing compositions of Examples 1-30 and Comparative Examples 1-18 (about 6g). Then, the foam was rubbed 10 times and rubbed all over with the nylon towel, and then the liquid skin cleansing composition was rinsed away with warm water at 40 ° C. Immediately after rinsing, “the skin was not wet at the end of rinsing” was evaluated according to the following evaluation criteria. As a result, an average evaluation score of the ten professional evaluators was obtained, and “the skin was not wet at the end of rinsing” was evaluated. In addition, if the average evaluation score is 3.0 points or more, “the skin is not wet at the end of rinsing” is good.
In addition, “the skin is not sticky at the end of rinsing” refers to a state where the composition does not remain on the skin when rinsing is finished, and there is no slimy feel.
-Evaluation criteria for "the skin is not wet at the end of rinsing"-
5 points: No sliminess 4 points: Little sliminess 3 points: Slightly feels but not uncomfortable 2 points: There is sliminess and discomfort 1 point: Very slimy There is discomfort

<Moisturized skin after towel drying>
Ten expert evaluators wet the 40 ° C warm water and lightly damp the nylon towel 2 pushes the liquid skin cleansing compositions of Examples 1-30 and Comparative Examples 1-18 (about 6g). After rubbed 10 times and foamed, the whole body was rubbed with the nylon towel, the liquid skin cleansing composition was rinsed with warm water at 40 ° C., and the water droplets were wiped off with a towel. Thereafter, “moist skin feeling after towel drying” was evaluated according to the following evaluation criteria. As a result, the average evaluation score of the 10 professional evaluators was obtained, and “the moist feeling of the skin after towel drying” was evaluated. In addition, if the average evaluation score is 3.0 points or more, the “moist skin feeling after towel drying” is good.
-Evaluation criteria for "moist skin feeling after towel drying"-
5 points: feels moist strongly 4 points: feels moist 3 points: feels moist a little 2 points: feels less moist 1 point: does not feel moist at all

(Examples 31-37)
A liquid skin cleanser composition having the composition and content shown in Table 9 below was prepared by a conventional method. Specifically, it was prepared by the following method.
Purified water in an amount of 95% by mass of the total amount of the liquid detergent composition to be finally obtained is heated to 70 ° C. to 80 ° C., (D) polyhydric alcohol, (A) higher fatty acid as component After dissolving the salt and the common component methacrylic acid-ethyl acrylate-butyl acrylate copolymer and cooling to 40 ° C. or lower, the (B) component cationic polymer, the (C) component phenoxyethanol, the common component A liquid skin cleanser composition was prepared by adding the perfume of (1) and monoethanolamine as component (E). After that, when the pH is less than the predetermined pH, the common component potassium hydroxide is added, adjusted to the predetermined pH, purified water is added so that the total amount becomes 100% by mass, and the intended liquid skin A cleaning composition was obtained. Moreover, a propeller was used as a stirring blade, and stirring was performed using a three-one motor (HEIDON BL1200, manufactured by Shinto Chemical Co., Ltd.). The pH was measured at 25 ° C. using a pH meter (HM-30R, manufactured by TOA DKK). Moreover, each liquid skin cleaning composition of Examples 31-37 obtained was filled in a container with a pump dispenser [discharge amount 3 mL, nozzle diameter (inner diameter) 3.5 mm, manufactured by Yoshino Kogyo Co., Ltd.].

  Next, for each of the obtained liquid skin cleansing compositions, as in Example 1, “low temperature stability”, “large amount of foam”, “foam creaminess”, “rinse end time” Evaluation was made on the “non-smoothness of the skin” and the “moist feeling of the skin after towel drying”. The results are shown in Table 9 below.

(Examples 38 to 43)
A liquid skin cleanser composition having the composition and content shown in Table 10 below was prepared by a conventional method. Specifically, it was prepared by the following method.
Purified water in an amount of 95% by mass of the total amount of the liquid detergent composition to be finally obtained is heated to 70 ° C. to 80 ° C., (D) polyhydric alcohol, (A) higher fatty acid as component After dissolving the salt and the common component methacrylic acid-ethyl acrylate-butyl acrylate copolymer and cooling to 40 ° C. or lower, the (B) component cationic polymer, the (C) component phenoxyethanol, the common component A liquid skin cleanser composition was prepared by adding a perfume of (1) and a copolymer of component (F). After that, when the pH is less than the predetermined pH, the common component potassium hydroxide is added, adjusted to the predetermined pH, purified water is added so that the total amount becomes 100% by mass, and the intended liquid skin A cleaning composition was obtained. Moreover, a propeller was used as a stirring blade, and stirring was performed using a three-one motor (HEIDON BL1200, manufactured by Shinto Chemical Co., Ltd.). The pH was measured at 25 ° C. using a pH meter (HM-30R, manufactured by TOA DKK). Moreover, each obtained liquid skin cleaning composition of Examples 38-43 was filled into the container [amount of discharge 3mL, nozzle aperture (inner diameter) 3.5mm, made by Yoshino Kogyo Co., Ltd.] with a pump dispenser.

  Next, for each of the obtained liquid skin cleansing compositions, as in Example 1, “low temperature stability”, “large amount of foam”, “foam creaminess”, “rinse end time” Evaluation was made on the “non-smoothness of the skin” and the “moist feeling of the skin after towel drying”. Further, in addition to the above evaluation, “smoothness of the skin during rinsing” was evaluated as follows. The results are shown in Table 10 below.

<Smoothness of skin when rinsing>
10 expert evaluators took 2 pushes (about 6 g) of the liquid skin cleansing composition of Examples 38 to 43 on a nylon towel wetted with warm water at 40 ° C. and lightly dampened, and rubbed 10 times. After rubbing the whole body with the nylon towel, the liquid skin cleansing composition was rinsed away with warm water at 40 ° C. Immediately after rinsing, “smoothness of skin during rinsing” was evaluated according to the following evaluation criteria. As a result, an average evaluation score of 10 professional evaluators was obtained, and “smoothness of the skin during rinsing” was evaluated. In addition, if the average evaluation score is 3.0 points or more, the “smoothness of the skin at the time of rinsing” is good.
-Evaluation criteria for "skin smoothness during rinsing"-
5 points: I feel the smoothness when rinsing 4 points: I feel the smoothness when rinsing 3 points: I feel a little smoothness when rinsing 2 points: I don't feel much smoothness when rinsing 1 point: When I rinse I do not feel smooth at all

(Examples 44 to 45)
A liquid skin cleanser composition having the composition and content shown in Table 11 below was prepared by a conventional method. Specifically, it was prepared by the following method.
Purified water in an amount of 95% by mass of the total amount of the liquid detergent composition to be finally obtained is heated to 70 ° C. to 80 ° C., (D) polyhydric alcohol, (A) higher fatty acid as component After dissolving the salt and the common component methacrylic acid-ethyl acrylate-butyl acrylate copolymer and cooling to 40 ° C. or lower, the (B) component cationic polymer, the (C) component phenoxyethanol, the common component A liquid skin cleansing composition was prepared by adding monoethanolamine as a fragrance (E) component and a copolymer as a component (F). After that, when the pH is less than the predetermined pH, the common component potassium hydroxide is added, adjusted to the predetermined pH, purified water is added so that the total amount becomes 100% by mass, and the intended liquid skin A cleaning composition was obtained. Moreover, a propeller was used as a stirring blade, and stirring was performed using a three-one motor (HEIDON BL1200, manufactured by Shinto Chemical Co., Ltd.). The pH was measured at 25 ° C. using a pH meter (HM-30R, manufactured by TOA DKK). Moreover, each obtained liquid skin cleaning composition of Examples 44-45 was filled into the container [amount of discharge 3mL, nozzle aperture (inner diameter) 3.5mm, made by Yoshino Kogyo Co., Ltd.] with a pump dispenser.

  Next, for each of the obtained liquid skin cleansing compositions, “low temperature stability”, “large amount of foam”, “foam creaminess”, “skin at the end of rinsing” were performed in the same manner as in Example 1. “Smoothness of skin after rinsing” and “moist feeling of skin after towel drying” were evaluated in the same manner as in Example 38 to evaluate “smoothness of skin when rinsing”. The results are shown in Table 11 below.

The details of various components used in the examples and comparative examples are shown in Table 12 below.
* 1: Potassium laurate is 100% neutralized lauric acid (NAA-122, manufactured by NOF Corporation) using potassium hydroxide (liquid caustic potash, manufactured by Asahi Glass Co., Ltd.).
* 2: Potassium myristate is 100% neutralized myristic acid (NAA-142, manufactured by NOF Corporation) using potassium hydroxide (liquid caustic potash, manufactured by Asahi Glass Co., Ltd.).
* 3: Potassium palmitate is obtained by neutralizing palmitic acid (NAA-160, manufactured by NOF Corporation) with potassium hydroxide (liquid caustic potash, manufactured by Asahi Glass Co., Ltd.) 100%.
* 4: Potassium stearate is 100% neutralized stearic acid (NAA-180, manufactured by NOF Corporation) using potassium hydroxide (liquid caustic potash, manufactured by Asahi Glass Co., Ltd.).

-(B) component and (B) comparative component-
* 1: Brookfield viscometer LVF (Brookfield), spindle no. 3, 6 rotations / minute, 25 ° C
* 2: Brookfield viscometer LVF (manufactured by Brookfield), spindle no. 1, 60 rotations / minute, 25 ° C
* 3: Brookfield viscometer LVF (manufactured by Brookfield), spindle no. 4, 30 rotations / minute, 25 ° C
* 4: Brookfield viscometer LVF (manufactured by Brookfield), spindle no. 4, 60 rotations / minute, 25 ° C
* 5: Brookfield viscometer LVF (manufactured by Brookfield), spindle no. 4, 10 rotations / minute, 25 ° C

-(F) component-
* 1: Brookfield viscometer LVF (Brookfield), spindle no. 4, 10 rotations / minute, 25 ° C
* 2: Brookfield viscometer LVF (manufactured by Brookfield), spindle no. 4, 30 rotations / minute, 25 ° C

  The liquid skin cleanser composition of the present invention is excellent in low-temperature stability, has a large amount of foam, has a creamy property of foam, a feeling of moist skin at the end of rinsing, and a moist feeling after towel drying. Therefore, for example, it is used for facial cleansing, hand soap, body soap, cleansing foam, makeup remover, etc., and particularly suitable for body soap.

Claims (3)

(A) 10% by mass to 30% by mass of a higher fatty acid salt containing all of laurate, myristic acid, and palmitate
(B) 0.2 mass% to 3 mass% of at least one cationic polymer selected from dimethyldiallylammonium chloride polymer and dimethyldiallylammonium chloride-acrylic acid copolymer;
(C) 0.1% to 1.5% by mass of phenoxyethanol, and (D) 5% to 20% by mass of at least one polyhydric alcohol selected from propylene glycol, dipropylene glycol, and 1,3-butylene glycol. Containing mass%,
The molar ratio of the structural unit derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer of the component (B) is 65 mol% or more,
The mass ratio (palmitate / phenoxyethanol) of the palmitate content (mass%) of the component (A) and the phenoxyethanol content (mass%) of the component (C) is 2 to 25. A liquid skin cleanser composition characterized by the above.   The liquid skin cleansing composition according to claim 1, further comprising (E) monoethanolamine. (F) The liquid skin cleanser composition in any one of Claim 1 to 2 which further contains the copolymer represented by following General formula (2).
However, in the said General formula (2), n, m, and 1 show the molar ratio (mol%) of a structural unit, it is n + m + 1 = 100, the said n is 0-34, The said m is 26.5. -31, l is 35-70.