JP2018188406A - Liquid skin cleanser composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a large amount of foam, creaminess of foam, lack of sliminess of skin at the end of rinsing, moist feeling of skin after towel drying, and smoothness of skin at the time of rinsing, and transparency of the preparation. Provision of a liquid skin cleansing composition having excellent properties. SOLUTION: (A) higher fatty acid salt 10% by mass to 32% by mass, (B) cationic polymer 0.2% by mass to 3% by mass, and (C) at least one hydroxy group of polyhydric alcohol are esters. It is a liquid skin cleaning agent composition containing 0.05% by mass to 3% by mass, and (D) polyoxyethylene alkyl ether 0.1% by mass to 2% by mass. [Selection diagram] None

Description

  The present invention relates to a liquid skin cleanser composition.

  Conventionally, a liquid skin cleanser composition has a high amount of foam, creaminess of the foam, smoothness of the skin at the end of rinsing, smoothness of the skin at the time of rinsing, and transparency of the preparation. It is hoped that there will be.

  In particular, recently, there has been a demand for providing a liquid skin cleanser composition having a high moisturizing property that can impart a moist feeling to the skin after washing.

Therefore, in order to give a moist feeling to the skin after washing, for example, a liquid skin cleansing composition containing a fatty acid salt and a cationic polymer having a structural unit derived from dimethyldiallylammonium chloride and acrylamide has been proposed. (For example, refer to Patent Document 1). However, in the above proposal, the moist feeling of the skin after towel drying and the smoothness of the skin at the time of rinsing are insufficient.
Further, a skin cleansing composition containing a fatty acid salt, a cationic polymer, and a solid oil or a semisolid oil at 30 ° C. has been proposed (for example, see Patent Document 2). However, in the above proposal, the amount of foam, the creaminess of the foam, the lack of wet skin at the end of rinsing, and the moist feeling of the skin after towel drying are insufficient.

  Therefore, the amount of foam, creaminess of foam, smoothness of skin at the end of rinsing, moist skin after towel drying, and smoothness of skin after rinsing are good, and the transparency of the preparation It is desired to provide a liquid skin cleanser composition that is excellent in water resistance.

JP, 2006-108411, A JP 2013-163658 A

  An object of the present invention is to solve the above-described problems and achieve the following objects. That is, the present invention is good in the amount of foam, creaminess of the foam, no skin wetness at the end of rinsing, moist feeling of the skin after towel drying, and smoothness of the skin in rinsing, An object of the present invention is to provide a liquid skin cleanser composition having excellent formulation transparency.

  In order to solve the above problems, the present inventor has conducted extensive studies, and as a result, (A) a higher fatty acid salt, (B) a cationic polymer, and (C) at least one hydroxy group of a polyhydric alcohol is esterified. The liquid skin cleanser composition containing the prepared oil agent and (D) polyoxyethylene alkyl ether has a large amount of foam, foam creaminess, and skin at the end of rinsing due to the synergistic effect of each component. It was found that the skin was not soggy, the skin was moist after towel drying, and the skin was smooth when rinsed, and the formulation was excellent in transparency.

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) 10% by mass to 32% by mass of a higher fatty acid salt containing laurate, myristate, 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) 0.05 mass% to 3 mass% of an oil agent in which at least one hydroxy group of a polyhydric alcohol is esterified,
(D) 0.1 to 2% by mass of polyoxyethylene alkyl ether having 12 to 22 carbon atoms in the alkyl group and 7 to 50 in average number of moles of ethylene oxide added,
The liquid skin cleanser composition, wherein the molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer of component (B) is 65 mol% or more.
<2> (E) The liquid skin cleanser composition according to <1>, further including at least one of an amphoteric surfactant and a lauryldimethylamine oxide surfactant.

  According to the present invention, it is possible to solve the above-described problems and achieve the above-mentioned object, and the amount of foam, creaminess of foam, lack of wet skin at the end of rinsing, and skin after towel drying It is possible to provide a liquid skin cleanser composition having good moist feeling and smooth skin during rinsing, and having excellent formulation transparency.

(Liquid skin cleanser composition)
The liquid skin cleanser composition of the present invention comprises (A) a higher fatty acid salt, (B) a cationic polymer, (C) an oil agent in which at least one hydroxy group of a polyhydric alcohol is esterified, and (D) polyoxy It contains ethylene alkyl ether, and further contains (E) a surfactant and other components as necessary.

<(A) Higher fatty acid salt containing laurate, myristate, and palmitate>
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 as necessary.

Examples of the counter ion of the higher fatty acid salt of the component (A) include ions of alkali metal, ammonium, alkanolamine, basic amino acid and the like.
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 viewpoints of a large amount of foam, creaminess of the foam, and non-smooth skin at the end of rinsing.

  The higher fatty acid salt of the component (A) is not particularly limited and may be blended as a higher fatty acid salt. A higher fatty acid and a salt such as potassium hydroxide, triethanolamine, monoethanolamine, etc. It may be separately added to the liquid skin cleansing composition and neutralized to obtain a higher fatty acid salt.

  As the content of the higher fatty acid salt of the component (A), 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, It is 10 mass%-32 mass% with respect to the whole quantity of the said liquid skin cleansing composition, and 20 mass%-32 mass% is preferable. When the content is less than 10% by mass, the amount of foam, the creaminess of the foam, and the non-smoothness of the skin at the end of rinsing become insufficient. The moist feeling of the skin becomes 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%-9 mass% are preferable with respect to the whole quantity of the said liquid skin cleaning composition, and 3 mass%-9 mass% are more preferable. If the contents of the laurate, myristic acid salt and palmitic acid are outside the above numerical ranges, respectively, the amount of foam, the creaminess of the foam, the lack of luster when rinsing, and the towel dry The moist feeling of the later skin may be insufficient.

  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 depending on the purpose, but may contain stearates and the like.

  As content of the said stearate, 20 mass% or less is preferable with respect to the whole quantity of the said higher fatty acid salt, and 10 mass% or less is more preferable. The lower limit of the stearate content is preferably 0% by mass.

<(B) Cationic polymer>
The cationic polymer as the component (B) is contained in order to improve the moist feeling of the skin after towel drying.

  The cationic polymer of the component (B) contains at least one selected from a dimethyldiallylammonium chloride polymer and a dimethyldiallylammonium chloride-acrylic acid copolymer having a molar ratio of dimethyldiallylammonium chloride of 65% or more. To do.

Of the component (B), the dimethyldiallylammonium chloride polymer-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 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 becomes 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.
As the weight average molecular weight of the cationic polymer of the component (B), 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) ).

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 from 10 mPa · s to the moist feeling of the skin after towel drying. 15,000 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. As said commercial item, the following are mentioned, for example.
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 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.

  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.

  Among these, as the cationic polymer of the component (B), from the viewpoint of the 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 is insufficient, and when it exceeds 3% by mass, the amount of foam is insufficient.

<(C) Oil agent in which at least one hydroxy group of polyhydric alcohol is esterified>
The oil agent in which at least one hydroxy group of the polyhydric alcohol of the component (C) is esterified is contained in order to improve the moist feeling of the skin after towel drying and the smoothness of the skin at the time of rinsing.

  The oil agent in which at least one hydroxy group of the polyhydric alcohol of the component (C) is esterified is an oil agent in which a part or all of the hydroxy group of the polyhydric alcohol is esterified, such as glycerin, diglycerin, An oil agent in which part or all of hydroxy groups of divalent to hexavalent polyhydric alcohols such as polyglycerin, pentaerythritol, dipentaerythritol and the like are esterified is preferable, or part of hydroxy groups of diglycerin and dipentaerythritol or Oils that are all esterified are more preferred.

  As a fatty acid which esterifies the said polyhydric alcohol, a C6-C24 fatty acid is preferable and a C8-C20 fatty acid is more preferable. The fatty acid may be linear or branched, may be saturated or unsaturated, and is preferably a liquid oil at 25 ° C.

  Examples of the oil agent in which at least one hydroxy group of the polyhydric alcohol of component (C) is esterified include, for example, diglyceryl triisostearate, diglyceryl tetraisostearate, dipentaerythrityl tetraoctanoate, dipentaerythrityl tetraisostearate, hexahydroxy Dipentaerythrityl stearate is preferred, and dipentaerythrityl hexahydroxystearate is more preferred. When the oil agent in which at least one hydroxy group of the polyhydric alcohol of the component (C) is esterified is dipentaerythrityl hexahydroxystearate, the moist feeling of the skin after towel drying and the smoothness of the skin at the time of rinsing are obtained. Can be improved.

  The content of the oil agent in which at least one hydroxy group of the polyhydric alcohol of the component (C) is esterified is preferably 0.05% by mass to 3% by mass with respect to the total amount of the liquid skin cleanser composition. 0.2 mass% to 1 mass% is more preferable. When the content is less than 0.05% by mass, the moist feeling of the skin after towel drying and the smoothness of the skin at the time of rinsing are insufficient, and when it exceeds 3% by mass, the amount of foam is large. And the creaminess of the foam is insufficient.

<(D) Polyoxyethylene alkyl ether>
The (D) component polyoxyethylene alkyl ether is contained in order to improve the transparency of the preparation.
The polyoxyethylene alkyl ether of the component (D) is a polyoxyethylene alkyl ether having an alkyl group having 12 to 22 carbon atoms and an average added mole number of ethylene oxide of 7 to 50.

  As carbon number of the alkyl group of the polyoxyethylene alkyl ether of the said (D) component, it is 12-22 from the transparency point of a formulation, and 12-16 are preferable.

  The average added mole number of ethylene oxide of the polyoxyethylene alkyl ether of the component (D) is 7 to 50, preferably 7 to 25, from the viewpoint of the transparency of the preparation.

  As the polyoxyethylene alkyl ether of the component (D), those appropriately synthesized may be used, or commercially available products may be used. Examples of the commercially available products include EMALEX 120 (POE (20) cetyl ether), EMALEX 130 (POE (30) cetyl ether), EMALEX 720 (POE (20) lauryl ether), EMALEX 750 (POE (50)). Lauryl ether) (Nippon Emulsion Co., Ltd.), NIKKOL BC-40 (POE (40) cetyl ether, Nikko Chemicals Co., Ltd.), Braunon EL-1519P (POE (19) lauryl ether), Braunon EL-1521 ( POE (40) lauryl ether) (above, manufactured by Aoki Yushi Kogyo Co., Ltd.). These may be used individually by 1 type and may use 2 or more types together. In addition, the numerical value in () after POE represents the average added mole number of ethylene oxide.

  The content of the polyoxyethylene alkyl ether of the component (D) is 0.1 mass with respect to the total amount of the liquid skin cleansing composition from the viewpoint of the amount of foam and the transparency of the preparation. % To 2% by mass is preferable, and 0.3% to 1% by mass is more preferable. When the content is less than 0.1% by mass, the transparency of the preparation is insufficient. When the content exceeds 2% by mass, the amount of foam is insufficient.

<(E) Surfactant>
The surfactant as the component (E) is contained in order to improve the foaming speed.

The surfactant of the component (E) is at least one selected from amphoteric surfactants and lauryl dimethylamine oxide.
The amphoteric surfactant is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include amino acid amphoteric surfactants and betaine amphoteric surfactants. These may be used alone or in combination of two or more.

  The component (E) is preferably a betaine amphoteric surfactant in terms of foaming speed. The betaine amphoteric surfactant is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include lauryldimethylaminoacetic acid betaine and lauric acid amidopropyl betaine. Among these, lauryldimethylaminoacetic acid betaine is preferable in terms of foaming speed.

  The content of the surfactant of the component (E) is 0.5% with respect to the total amount of the liquid skin cleansing composition from the viewpoint of non-smooth skin at the end of rinsing and the speed of foaming. The mass is preferably 5% by mass, and more preferably 0.8% by mass to 3% by mass. When the content is less than 0.5% by mass, the foaming speed may be reduced. When the content is more than 5% by mass, the skin may not be sufficiently wet at the end of rinsing. .

<Other ingredients>
In addition to the components (A) to (E) described above, the liquid skin cleansing composition of the present invention can be blended with other components as necessary within a range not impairing the effects of the present invention. .
Examples of the other components include purified water, water-soluble polymers other than the component (B), silicones, jojoba oil, olive oil, monohydric alcohol fatty acid esters, hydrocarbons, alcohols, lanolin derivatives, protein derivatives, vitamins Chemicals such as, bactericides, preservatives, pH adjusters such as potassium hydroxide, citric acid, hydrochloric acid, antioxidants, sequestering agents, UV absorbers, animal and plant extracts, or derivatives thereof, chelating agents such as edetic acid , Pigments, fragrances, pigments, inorganic powders, clay minerals, water-insoluble polymer compound 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)-(E) component, As needed, said other component Can be obtained by mixing.
Specifically, it can be produced as follows. An oil agent in which at least one hydroxy group of the polyhydric alcohol of the component (C) is esterified in purified water heated to 70 ° C. to 80 ° C., the component (D) The polyoxyethylene alkyl ether having 12 to 22 carbon atoms and an average added mole number of ethylene oxide of 7 to 50 is dissolved and cooled to 40 ° C. or lower, and then the component (B) And the surfactant (E) as necessary. 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 is obtained.

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 glass electrode type hydrogen ion concentration indicator (device name: HM-30R, manufactured by Toa DKK Corporation, electrode type GST-5721).

-Viscosity-
There is no restriction | limiting in particular as a viscosity in 25 degreeC of the said liquid skin cleansing composition, According to the objective, it can select suitably, 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 3,000 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 4 minutes using a rotor of No. 4.

-Container-
The liquid skin cleansing composition of the present invention is not particularly limited and can be appropriately selected depending on the purpose, 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.

-Application-
The liquid skin cleanser composition of the present invention has a large amount of foam, creaminess of the foam, no stickiness of the skin at the end of rinsing, moist feeling of the skin after towel drying, and smoothness of the skin when rinsing And is excellent in the transparency of the preparation, and is used, for example, in face wash, hand soap, body soap, cleansing foam, makeup remover, etc., and particularly preferably used in 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 as described in an Example and a comparative example is the value converted into a pure part.

(Examples 1 to 25 and Comparative Examples 1 to 18)
Liquid skin cleansing compositions having the compositions and contents shown in Tables 1 to 12 below were prepared by a conventional method. Specifically, it was prepared by the following method.
-Preparation of liquid skin cleanser composition-
Purified water in an amount of 95% by mass with respect to the total amount of the liquid skin cleanser composition finally obtained is heated to 70 ° C. to 80 ° C. to obtain a higher fatty acid salt of component (A) and a large amount of component (C). An oil agent in which at least one hydroxy group of a hydric alcohol is esterified and (D) component polyoxyethylene alkyl ether are dissolved and cooled to 40 ° C. or lower, and then (B) component cationic polymer is added. As a result, a liquid skin cleanser composition was prepared. 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 (device name: HEIDON BL1200, manufactured by Shinto Chemical Co., Ltd.). The pH was measured at 25 ° C. using a pH meter (device name: HM-30R, manufactured by Toa DKK Corporation).
Each liquid skin cleaning composition of Examples 1-25 and Comparative Examples 1-18 obtained was a container with a pump dispenser (discharge amount 3 mL, nozzle diameter (inner diameter) 3.5 mm, manufactured by Yoshino Kogyo Co., Ltd.). Filled.

  Next, for each of the obtained liquid skin cleansing compositions, as described below, “the amount of foam”, “the creaminess of foam”, “the skin is not wet at the end of rinsing”, “ The skin moist feeling after towel drying, the smoothness of the skin when rinsing, and the transparency of the preparation were evaluated. The results are shown in Tables 1 to 12 below.

<A large amount of foam and creaminess of foam>
10 expert evaluators wet the 40 ° C warm water and lightly damp nylon towel 2 pushes (about 6g) of the liquid skin cleansing compositions of Examples 1-25 and Comparative Examples 1-18 Take a nylon towel and rub it 10 times to observe the amount of foam and the creaminess of the foam. The score is determined according to the following evaluation criteria. Based on this, “the amount of foam” and “the creaminess of foam” were evaluated. When the average evaluation score is 3.0 or more, “the amount of foam” and “the creaminess of foam” are good.
[Evaluation criteria for the amount of foam]
5 points: foam overflows from nylon towel 4 points: 70% or more and less than 100% of nylon towel is covered with foam 3 points: 50% or more and less than 70% of nylon towel is covered with foam 2 points: 20% or more and less than 50% of nylon towel is covered with foam 1 point: Less than 20% of nylon towel is covered with foam or almost no foam [Evaluation criteria for foam creamy]
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>
10 expert evaluators wet the 40 ° C warm water and lightly damp nylon towel 2 pushes (about 6g) of the liquid skin cleansing compositions of Examples 1-25 and Comparative Examples 1-18 After rubbing 10 times and lathering, rubbing the whole body with the nylon towel, and immediately rinsing the liquid skin cleansing composition with warm water at 40 ° C. An evaluation score was determined according to the evaluation criteria, and “no skin wetness at the end of rinsing” was evaluated based on the average evaluation score of the ten professional evaluators. When the average evaluation score is 3.0 or more, “the skin is not wet at the end of rinsing” is good.
“Non-skinned skin at the end of rinsing” means that the composition does not remain on the skin when rinsing is completed, and there is no slimy feel.
[Evaluation criteria for non-smooth skin 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>
10 expert evaluators wet the 40 ° C warm water and lightly damp nylon towel 2 pushes (about 6g) of the liquid skin cleansing compositions of Examples 1-25 and Comparative Examples 1-18 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, an evaluation score for “moist feeling of the skin after towel drying” was obtained according to the following evaluation criteria, and “moist feeling of the skin after towel drying” was evaluated based on the average evaluation score of the ten professional evaluators. When the average evaluation score is 3.0 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

<Smoothness of skin when rinsing>
10 expert evaluators wet the 40 ° C warm water and lightly damp nylon towel 2 pushes (about 6g) of the liquid skin cleansing compositions of Examples 1-25 and Comparative Examples 1-18 After rubbed 10 times, lathered, rubbed the whole body with the nylon towel, and rinsed the liquid skin cleansing composition with warm water at 40 ° C., the “smoothness of the skin when rinsing” was determined according to the following evaluation criteria. Evaluation points were determined, and “smoothness of the skin during rinsing” was evaluated based on the average evaluation points of the ten professional evaluators. 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 of the skin when rinsing 4 points: I feel the smoothness of the skin when rinsing 3 points: I feel the smoothness of the skin when rinsing 2 points: I feel the smoothness of the skin when rinsing I do not feel 1 point: I do not feel the smoothness of the skin when rinsing

<Transparency of formulation>
Each liquid skin of Examples 1 to 25 and Comparative Examples 1 to 18 was placed in a cylindrical transparent glass bottle (trade name: Screw mouth bottle SV-50A, manufactured by Nidec Rika Glass Co., Ltd.) having a diameter of 4 cm and a height of 7.5 cm. Put the detergent composition up to the mouth of the glass bottle, place a pocket-sized near vision card 40 cm (manufactured by TMI Co., Ltd.) on the back of the glass bottle, and put the card over the transparent glass bottle containing the liquid skin detergent composition. The mark in the inside is observed, and the “preparation transparency” is evaluated according to the following evaluation criteria. Based on the average evaluation scores of the 10 professional evaluators, the “preparation transparency” is determined according to the following average evaluation criteria. Evaluated. If the criterion is ◯ or more, the “transparency of the preparation” is good.
[Evaluation criteria for formulation transparency]
5 points: Transparent, clear mark 4 points: Slightly cloudy but mark can be confirmed 3 points: Slightly cloudy, mark difficult to check 2 points: Cloudy, mark almost confirmed Cannot be 1 point: Cloudy and no marks can be confirmed [Judgment criteria for average evaluation points]
◎: 5.0 points ○: 4.0 points or more and less than 5.0 points △: 3.0 points or more and less than 4.0 points ×: Less than 3.0 points

(Examples 26 to 35)
Liquid skin cleansing compositions having the compositions and contents shown in Tables 13 to 15 below were prepared by a conventional method. Specifically, it was prepared by the following method.
Purified water in an amount of 95% by mass with respect to the total amount of the liquid skin cleanser composition finally obtained is heated to 70 ° C. to 80 ° C. to obtain a higher fatty acid salt of component (A) and a large amount of component (C). An oil agent in which at least one hydroxy group of a monohydric alcohol is esterified and the polyoxyethylene alkyl ether of the component (D) are dissolved and cooled to 40 ° C. or lower, and then the cationic polymer of the component (B) and (E ) A liquid skin cleansing composition was prepared by adding the component surfactant. 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 (device name: HEIDON BL1200, manufactured by Shinto Chemical Co., Ltd.). The pH was measured at 25 ° C. using a pH meter (device name: HM-30R, manufactured by Toa DKK Corporation).
The obtained liquid skin cleansing compositions of Examples 26 to 35 were 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, in the same manner as in Example 1, “the amount of foam”, “the creaminess of foam”, “the skin is not wet at the end of rinsing” , “Moistness of skin after towel drying”, “Smoothness of skin when rinsing”, and “Transparency of preparation” were evaluated. Furthermore, in addition to the above evaluation, “the speed of foaming” was evaluated as follows. The results are shown in Tables 13 to 15 below.

<Speed of foaming>
Ten expert evaluators take 2 pushes (about 6 g) of the liquid skin cleansing compositions of Examples 26 to 35 in a nylon towel wetted and lightly dampened, and rub the nylon towel 10 times to foam. In the meantime, the foaming was observed, the evaluation score was determined according to the following evaluation criteria, and the “speed of foaming” was evaluated based on the average evaluation score of the 10 expert evaluators. If the average evaluation score is 3.0 or more, the “foaming speed” is good.
<Evaluation point>
5 points: Very fast 4 points: Fast 3 points: Slightly fast 2 points: Slightly slow 1 point: Slow

(Example 36)
A liquid skin cleansing composition having the composition and content shown in Table 16 below was prepared by a conventional method. Specifically, it was adjusted by the following method.
Purified water in an amount of 95% by mass with respect to the total amount of the liquid skin cleanser composition finally obtained is heated to 70 ° C. to 80 ° C., and the higher fatty acid salt of component (A), edetic acid, (C) Dissolve the oil agent in which at least one hydroxy group of the component polyhydric alcohol is esterified, liquid paraffin, (D) component polyoxyethylene alkyl ether, and monoethanolamine, cool to 40 ° C. or lower, A liquid skin cleansing composition was prepared by adding the cationic polymer of component B) and phenoxyethanol. 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 (device name: HEIDON BL1200, manufactured by Shinto Chemical Co., Ltd.). The pH was measured at 25 ° C. using a pH meter (device name: HM-30R, manufactured by Toa DKK Corporation).
The obtained liquid skin cleanser composition of Example 36 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, with respect to the obtained liquid skin cleansing composition, in the same manner as in Example 1, “the amount of foam”, “the creaminess of foam”, “the skin is not wet at the end of rinsing”, “ The skin moist feeling after towel drying, the smoothness of the skin when rinsing, and the transparency of the preparation were evaluated. The results are shown in Table 16 below.

  The raw materials used in the above Examples and Comparative Examples are as shown in Table 17 and Table 18 below.

* 1: As potassium laurate, lauric acid (NAA-122, manufactured by NOF Corporation) was neutralized with potassium hydroxide (liquid caustic potash, manufactured by Asahi Glass Co., Ltd.).
* 2: Potassium myristate was obtained by neutralizing myristic acid (NAA-142, manufactured by NOF Corporation) with potassium hydroxide (liquid caustic potash, manufactured by Asahi Glass Co., Ltd.).
* 3: Potassium palmitate was obtained by neutralizing palmitic acid (NAA-160, manufactured by NOF Corporation) with potassium hydroxide (liquid caustic potash, manufactured by Asahi Glass Co., Ltd.).
* 4: Potassium stearate used was obtained by neutralizing stearic acid (NAA-180, manufactured by NOF Corporation) with potassium hydroxide (liquid caustic potash, manufactured by Asahi Glass Co., Ltd.).
* 5: The dimethyldiallylammonium chloride / acrylic acid (30:70) copolymer and the acrylic acid / dimethyldiallylammonium chloride / acrylamide (34:31:35) copolymer are represented by the following general formula (2). It is a high molecular compound which has a structure.
However, in the said General formula (2), n, m, and z represent a molar ratio, and the said dimethyldiallylammonium chloride acrylic acid (30:70) copolymer is said n is 30, said m is 70, z is 0. In the dimethyldiallylammonium chloride / acrylic acid (30:70) copolymer, n is 34, m is 31, and z is 35.

  The liquid skin cleanser composition of the present invention has a large amount of foam, creaminess of the foam, no stickiness of the skin at the end of rinsing, moist feeling of the skin after towel drying, and smoothness of the skin when rinsing Is excellent in the transparency of the preparation, and is suitably used for, for example, facial cleansers, hand soaps, body soaps, cleansing foams, makeup removers and the like.

Claims (2)

(A) 10% by mass to 32% by mass of a higher fatty acid salt containing laurate, myristate, 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) 0.05 mass% to 3 mass% of an oil agent in which at least one hydroxy group of a polyhydric alcohol is esterified,
(D) 0.1 to 2% by mass of polyoxyethylene alkyl ether having 12 to 22 carbon atoms in the alkyl group and 7 to 50 in average number of moles of ethylene oxide added,
A liquid skin cleanser composition, wherein the molar ratio of structural units derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer of component (B) is 65 mol% or more.   The liquid skin cleanser composition according to claim 1, further comprising (E) an amphoteric surfactant and at least one surfactant of lauryl dimethylamine oxide.