WO2017208524A1

WO2017208524A1 - Liquid skin cleanser composition

Info

Publication number: WO2017208524A1
Application number: PCT/JP2017/006528
Authority: WO
Inventors: 真悠子石井; 葉月筒井; 梨彩子河崎
Original assignee: ライオン株式会社
Priority date: 2016-05-31
Filing date: 2017-02-22
Publication date: 2017-12-07
Also published as: JP6745144B2; JP2017214326A

Abstract

Provided is a liquid skin cleanser composition which includes: 10-32 mass% of higher fatty acid salts (A) including any from among lauric acid salts, myristic acid salts, and palmitic acid salts; 0.2-3 mass% of at least one cationic polymer (B) selected from a dimethyldiallylammonium chloride polymer and a specific dimethyldiallylammonium chloride-acrylic acid copolymer; 0.1-1.5 mass% of phenoxyethanol (C); and 0.1-2 mass% of a specific polyoxyethylene alkyl ether (D).

Description

Liquid skin cleanser composition

The present invention relates to a liquid skin cleanser composition.

Conventionally, liquid skin cleansing compositions such as hand soaps and body soaps have good foam performance such as a large amount of foam and foam creaminess, feel during rinsing, and after washing. It is desired to improve the condition of the skin. 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 3). However, the above proposal is insufficient in terms of the moist feeling of the skin after washing and the lack of squeaky feeling during rinsing.

Therefore, in order to improve the skin condition after washing, a liquid skin cleanser composition containing a fatty acid salt, a cationic polymer, polyoxyethylene alkyl ether, and powder for imparting gloss to the skin has been proposed. (For example, see Patent Documents 4 and 5). However, in these proposals, since the powder is contained and a large amount of polyoxyethylene alkyl ether is contained, the amount of foam is insufficient, and the moist feeling of the skin after washing is satisfactory. It is not a thing.
Furthermore, a liquid skin cleanser composition containing a fatty acid salt, a cationic polymer, and an N-acylamino acid has been proposed (see, for example, Patent Document 6). However, in this proposal, since the content of the fatty acid salt is small, the foam performance is insufficient such as a large amount of foam, foam creamy properties, and the end of rinsing. It is not satisfactory in terms of lack of squeaky feeling and moist feeling of the skin after washing.

Therefore, satisfying all of the lack of squeakiness at the time of rinsing and the smoothness of the skin at the end of rinsing, the amount of foam, the creaminess of the foam, and the moist feeling of the skin after towel drying It is desired to provide a liquid skin cleanser composition that can be used.

JP 2006-56802 A JP 2005-272658 A JP-A-2015-74621 Special table 2007-530610 JP 2012-111762 A Special table 2008-530152

This invention makes it a subject to solve the said various problems in the past and to achieve the following objectives. That is, the present invention is a liquid skin cleanser that has a large amount of foam, creaminess of the foam, no squeaky sensation at the time of rinsing, smoothness of the skin at the end of rinsing, and a moist feeling of the skin after towel drying An object is to provide an agent composition.

In order to solve the above-mentioned problems, the present inventors have conducted extensive studies, and as a result, contain (A) a higher fatty acid salt, (B) a cationic polymer, (C) phenoxyethanol, and (D) a polyoxyethylene alkyl ether. The liquid skin cleanser composition, due to the synergistic effect of each component, has a large amount of foam, good creaminess of the foam, no squeaky feeling at the time of rinsing, no smoothness of the skin at the end of rinsing, It was also found that the moist feeling of the skin after towel drying 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) 10% by mass to 32% by mass of a higher fatty acid salt containing any of laurate, myristate, and palmitate
(B) 0.2% by mass to 3% by mass of at least one cationic polymer selected from a dimethyldiallylammonium chloride polymer and a dimethyldiallylammonium chloride-acrylic acid copolymer;
(C) 0.1 to 1.5% by mass of phenoxyethanol, and (D) 0.1 to 2% by mass of polyoxyethylene alkyl ether,
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,
A liquid skin cleanser composition, wherein the alkyl group in the polyoxyethylene alkyl ether of component (D) has 12 to 22 carbon atoms and the average added mole number of ethylene oxide is 7 to 100 .
<2> The liquid skin cleanser composition according to <1>, further including (E) an amphoteric surfactant and at least one surfactant selected from lauryldimethylamine oxide.
<3> The liquid skin cleanser composition according to <2>, wherein the content of the surfactant as the component (E) is 0.7% by mass to 3% by mass.

According to the present invention, the above-mentioned problems can be solved and the object can be achieved, the amount of foam is large, the creaminess of the foam, the squeaky feeling at the time of rinsing, and the skin becoming wet at the end of rinsing. It is possible to provide a liquid skin cleanser composition that has good adhesion and a moist feeling on the skin after towel drying.

(Liquid skin cleanser composition)
The liquid skin cleanser composition of the present invention contains (A) a higher fatty acid salt, (B) a cationic polymer, (C) phenoxyethanol, and (D) a polyoxyethylene alkyl ether, and (E) a surfactant. It is preferably contained, and further contains other components as necessary.

<(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 any of 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 the counter ions, potassium ions are preferable from the viewpoint of the amount of bubbles and the creaminess of the bubbles.
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 amount of foam, the creaminess of the foam, the squeaky feeling at the time of rinsing, the lack of skin wetness at the end of rinsing, and after the towel drying From the viewpoint of moist feeling of the skin, it is 10% by mass to 32% by mass, and preferably 20% by mass to 32% by mass with respect to the total amount of the liquid skin cleansing composition. When the content is less than 10% by mass, the amount of foam, the creaminess of the foam, and the non-smooth skin at the end of rinsing may be insufficient, and when the content exceeds 32% by mass, There may be no squeaky feeling when rinsing and a moist feeling on the skin after towel drying.

The content of the laurate is preferably 3% by mass to 12% by mass, and more preferably 7% by mass to 12% by mass with respect to the total amount of the liquid skin cleanser composition. The content of myristic acid salt is preferably 4% by mass to 14% by mass, and more preferably 8% by mass to 14% by mass with respect to the total amount of the liquid skin cleanser composition. The content of the palmitate is preferably 1% by mass to 9% by mass, and more preferably 3% by mass to 9% by mass with respect to the total amount of the liquid skin cleanser composition. When the content of the laurate, myristate, and palmitate is out of the numerical range, the amount of foam is large, the creaminess of the foam, the squeaky feeling at the time of rinsing, the end of rinsing Sometimes the skin is not wet and the moist feeling of the skin after towel drying 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 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. From the viewpoint of the amount of foam, 20% by mass with respect to the total amount of the higher fatty acid salt. The following is preferable, 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 of component (B) is at least one selected from dimethyldiallylammonium chloride polymer and dimethyldiallylammonium chloride-acrylic acid copolymer, and improves the moist feeling of the skin after towel drying. Is contained for.

Of the component (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 of each monomer unit, it is n + m = 100, and the said m is 65 mol% or more.

Among the components (B), the molar ratio of the structural unit derived from dimethyldiallylammonium chloride in the dimethyldiallylammonium chloride-acrylic acid copolymer is 65 mol% or more from the viewpoint 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 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 component (B) cationic polymer is not particularly limited and may be appropriately selected depending on the intended purpose. From the viewpoint of moist feeling after towel drying, 10,000 to 1 15,000,000 is preferable, and 15,000 to 450,000 is more preferable.
The weight average molecular weight of the cationic polymer of the component (B) is, for example, the SEC-MALLS-RI system (measurement conditions: 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 to 15 m from the point of moist feeling of 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.

Marcote 295 (component name: dimethyldiallylammonium chloride-acrylic acid copolymer, manufactured by Lubrizol Corporation, solid content 35% to 40% by weight, 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.

Marcote 280 (component name: dimethyldiallylammonium chloride-acrylic acid copolymer, manufactured by Lubrizol Corporation, solid content 39 mass% to 43 mass%, viscosity at 25 ° C .: 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), Marcoat 100, Marcoat 106, and Marcoat 295 are preferable, and Marcoat 100 is more preferable in terms of moist feeling after towel drying.

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 to 3% by mass, and preferably 0.3 to 1% by mass. 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 in order to improve the moist feeling of the skin after towel drying.
The content of the phenoxyethanol of the component (C) is based on the total amount of the liquid skin cleanser composition from the viewpoint of the amount of foam, creaminess of the foam, and moist feeling of the skin after towel drying. 0.1 mass% to 1.5 mass%, preferably 0.3 mass% to 1.2 mass%. When the content is less than 0.1% by mass, the moist feeling of the skin after towel drying may be insufficient, and when it exceeds 1.5% by mass, the amount of foam and the foam The creamy property of may become insufficient.

<(D) Polyoxyethylene alkyl ether>
The (D) component polyoxyethylene alkyl ether is contained in order to improve the feeling of creaking when rinsing and the moist feeling of the skin after towel drying.
The average added mole number of ethylene oxide (EO) of the polyoxyethylene alkyl ether is 7 to 100, preferably 15 to 100.
When the average added mole number of ethylene oxide (EO) is less than 7 moles, the moist feeling of the skin after towel drying may be insufficient, and those exceeding 100 moles are difficult to obtain as commercial products.
In the polyoxyethylene alkyl ether of component (D), the alkyl group has 12 to 22 carbon atoms, preferably 16 to 20 carbon atoms.
When the alkyl group has less than 12 carbon atoms, the squeakiness at the time of rinsing may be insufficient, and those exceeding 22 are difficult to obtain as commercial products.

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 POE (20) cetyl ether (EMALEX 120), POE (15) lauryl ether (EMALEX 715), POE (25) stearyl ether (EMALEX 625), POE (manufactured by Nippon Emulsion Co., Ltd. 20) Behenyl ether (EMALEX BHA-20) and the like. These may be used individually by 1 type and may use 2 or more types together.
However, the numbers in parentheses indicate the average number of moles of ethylene oxide added, and “POE” stands for polyoxyethylene.

The content of the polyoxyethylene alkyl ether as the component (D) includes the above-mentioned liquid skin cleanser from the viewpoints of a large amount of foam, a feeling of creaking when rinsing, and a feeling of moist skin after towel drying. The content is 0.1% by mass to 2% by mass, and preferably 0.2% by mass to 1% by mass with respect to the total amount of the composition. When the content is less than 0.1% by mass, no squeaky feeling at the time of rinsing and moist feeling of the skin after towel drying may be insufficient. A large amount may be insufficient.

[Mass ratio (C / D)]
As the mass ratio (C / D) of the content (mass%) of the component (C) and the content (mass%) of the component (D), the creamy property of the foam, the squeaky feeling of the skin at the time of rinsing 0.25 to 13 is preferable, and 1 to 5 is more preferable from the viewpoint of dryness and moist feeling of the skin after towel drying. When the mass ratio is less than 0.25, the moist feeling of the skin after towel drying may be insufficient. When it exceeds 13, the creamy property of the foam and the lack of squeaky feeling during rinsing are insufficient. It may become.

<(E) Surfactant>
The surfactant (E) is included to improve the speed of foaming.

The surfactant of the component (E) is preferably at least one selected from amphoteric surfactants and lauryl dimethylamine oxide.
The lauryl dimethylamine oxide is a kind of nonionic surfactant.
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 individually by 1 type and may use 2 or more types together.

Among these, as the component (E), a betaine amphoteric surfactant is preferable from the viewpoint of the speed of foaming and the lack of wetness at the end of rinsing.
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 the speed of foaming.

The content of the surfactant of the component (E) is 0.5% by mass with respect to the total amount of the liquid skin cleansing composition from the viewpoint of quick foaming and no stickiness at the end of rinsing. Is preferably 5% by mass, more preferably 0.7% by mass to 3% by mass. When the content is less than 0.5% by mass, the speed of foaming may be insufficient, and when the content exceeds 5% by mass, the lack of wet skin at the end of rinsing may be insufficient. .

<Other ingredients>
In addition to the components (A) to (E) described above, the liquid skin cleansing 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, water-soluble polymers other than the cationic polymer of component (B), alcohols such as oils, lower and higher alcohols, lanolin derivatives, protein derivatives, acrylic resin dispersions, vitamins Drugs such as bactericides, preservatives, viscosity modifiers, pH adjusters, antioxidants, sequestering agents, UV absorbers, animal and plant extracts or their derivatives, dyes, fragrances, pigments, inorganic powders, clay minerals, Examples thereof include water-insoluble polymer powders such as nylon and polyethylene. These may be used alone or in combination of two or more.

-Production method-
The method for producing the liquid skin cleanser composition of the present invention is not particularly limited and may be appropriately selected depending on the purpose. The components (A) to (D) and, if necessary, the component (E) It can be obtained by mixing the components, the other components, and the purified water (the remaining amount blended so that the entire liquid skin cleansing composition is 100% by mass).
Specifically, it can be produced as follows. The purified polyoxyethylene alkyl ether of component (D) and the higher fatty acid salt of component (A) are dissolved in purified water heated to 70 ° C. to 80 ° C., cooled to 40 ° C. or lower, and then (B ) Component cationic polymer, (C) component phenoxyethanol, and (E) component surfactant 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 at 25 ° C. of the liquid skin cleansing composition is preferably 9.5 to 11.0, 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-
The viscosity at 25 ° C. of the liquid skin cleansing composition is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 1 mPa · s to 6,000 mPa · s, and preferably 50 mPa · s to 4 1,000 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, 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.

-Applications-
The liquid skin cleanser composition of the present invention has a large amount of foam, creaminess of the foam, no squeaky feeling at the time of rinsing, no moist skin at the end of rinsing, and a moist feeling of the skin after towel drying Since it is good, it is used for, for example, face wash, 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 to 33 and Comparative Examples 1 to 18)
Liquid skin cleansing compositions having the compositions and contents shown in Tables 1 to 9 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 detergent composition finally obtained is heated to 70 ° C. to 80 ° C., and (D) component polyoxyethylene alkyl ether, and (A) component After dissolving the higher fatty acid salt of and cooling to 40 ° C. or lower, a liquid skin cleansing composition was prepared by adding the cationic polymer of component (B) and phenoxyethanol of component (C). 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). In addition, each of the obtained liquid skin cleansing compositions of Examples 1 to 33 and Comparative Examples 1 to 18 is 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, “the amount of foam”, “the creaminess of foam”, “the absence of squeaky feeling when rinsing”, “the end of rinsing” Evaluation was made on the “no-smoothness of the skin” and “the moist feeling of the skin after towel drying”. The results are shown in Tables 1 to 9 below.

<The amount of foam, creamy nature of foam>
Ten expert evaluators take 2 pushes (about 6 g) of the liquid skin cleansing compositions of Examples 1 to 33 and Comparative Examples 1 to 18 on a nylon towel that has been dampened with warm water at 40 ° C. and lightly dampened. 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 "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 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 properties 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

<No squeak when rinsing>
Ten expert evaluators take 2 pushes (about 6 g) of the liquid skin cleansing compositions of Examples 1 to 33 and Comparative Examples 1 to 18 on a nylon towel that has been dampened with warm water at 40 ° C. and lightly dampened. After lathering 10 times and rubbing the whole body with the nylon towel, when rinsing the liquid skin cleansing composition with warm water at 40 ° C., the following evaluation criteria are used. Evaluated according to. As a result, an average evaluation score of 10 professional evaluators was obtained, and “no squeaky feeling at the time of rinsing” was evaluated. In addition, if the average evaluation score is 3.0 or more, “no squeaky feeling at the time of rinsing” is good.
Further, the “no squeaky feeling at the time of rinsing” means that there is no feeling that the hand and the arm rub against each other when the arm is rubbed with the hand.
-Evaluation criteria for "no squeak when rinsing"-
5 points: No squeaking until the end of rinsing 4 points: No squeaking during rinsing, slight squeaking at the end of rinsing 3 points: Slight squeaking during rinsing, but no discomfort 2 Point: There is a squeaky feeling during rinsing, and there is some discomfort 1 point: There is a very squeaky feeling during rinsing, and there is discomfort

<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 (about 6g) of the liquid skin cleansing compositions of Examples 1-33 and Comparative Examples 1-18. After rubbed 10 times and foaming, rubbing the whole body with the nylon towel, rinse the liquid skin cleansing composition with warm water of 40 ° C. 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.
Moreover, the above-mentioned “non-smooth skin at the end of rinsing” refers to a state where the composition does not remain on the skin when rinsing is completed 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 take 2 pushes (about 6 g) of the liquid skin cleansing compositions of Examples 1 to 33 and Comparative Examples 1 to 18 on a nylon towel that has been dampened with warm water at 40 ° C. and lightly dampened. After lathering 10 times and rubbing the whole body with the nylon towel, the liquid skin cleansing composition was rinsed away with warm water at 40 ° C., and 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 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 34 to 41)
Liquid skin cleansing compositions having the compositions and contents shown in Tables 10 to 11 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 detergent composition finally obtained is heated to 70 ° C. to 80 ° C., and (D) component polyoxyethylene alkyl ether, and (A) component Liquid skin wash by dissolving the higher fatty acid salt of and cooling to 40 ° C. or lower and then adding the cationic polymer of component (B), the phenoxyethanol of component (C), and the surfactant of component (E) An agent 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 (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). In addition, each of the obtained liquid skin cleansing compositions of Examples 34 to 41 was filled into 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 cleanser compositions, “a large amount of foam”, “a creamy property of foam”, “no squeaky feeling during rinsing”, “rinse” in the same manner as in Example 1. Evaluation was made on the “non-smoothness of the skin at the end” and the “moist feeling of the skin after towel drying”. In addition to the above evaluation, the “fastness of foaming” was evaluated as follows. The results are shown in Tables 10 to 11 below.

<Speed of foaming>
Ten expert evaluators took 2 pushes (about 6 g) of the liquid skin cleansing composition of Examples 34 to 41 in a nylon towel wetted with 40 ° C. warm water and lightly dampened, and put the nylon towel 10 times. Foaming was observed during rubbing and foaming was evaluated according to the following evaluation criteria. As a result, the average evaluation score of the 10 expert evaluators was obtained, and “fastness of foaming” was evaluated. In addition, if the average evaluation score is 3.0 points or more, the “speed of foaming” is good.
-Evaluation criteria for "fastness of foaming"-
5 points: Very fast 4 points: Fast 3 points: Slightly fast 2 points: Slightly slow 1 point: Slow

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

The liquid skin cleanser composition of the present invention has a large amount of foam, creaminess of the foam, no squeaky feeling at the time of rinsing, no moist skin at the end of rinsing, and a moist feeling of the skin after towel drying Since it is good, it is suitably used for, for example, facial cleansers, hand soaps, body soaps, cleansing foams, makeup removers, etc., and particularly suitable for body soaps.

Claims

(A) 10% by mass to 32% by mass of a higher fatty acid salt containing any of laurate, myristic acid, and palmitate,
(B) 0.2% by mass to 3% by mass of at least one cationic polymer selected from a dimethyldiallylammonium chloride polymer and a dimethyldiallylammonium chloride-acrylic acid copolymer;
(C) 0.1 to 1.5% by mass of phenoxyethanol, and (D) 0.1 to 2% by mass of polyoxyethylene alkyl ether,
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,
A liquid skin cleanser composition, wherein the alkyl group in the polyoxyethylene alkyl ether of component (D) has 12 to 22 carbon atoms and the average added mole number of ethylene oxide is 7 to 100.
The liquid skin cleansing composition according to claim 1, further comprising (E) an amphoteric surfactant and at least one surfactant selected from lauryldimethylamine oxide.
The liquid skin cleanser composition according to claim 2, wherein the content of the surfactant as the component (E) is 0.7% by mass to 3% by mass.