JP2017214328A - Liquid cleanser composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid skin cleanser composition which is excellent in easiness to take a preparation in hand, transparency and high temperature stability, forms a large amount of foam, is good in foam creaminess and no sliminess of the skin at the completion of rinsing and imparts a good moist feeling 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) a (meth)acrylic acid alkyl-(meth)acrylic acid copolymer and (D) polyoxyethylene alkyl ether, and (E) at least one polyhydric alcohol selected from propylene glycol, glycerol, 1,3-butylene glycol and dipropylene 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 and 2). However, since the proposal does not contain any polymer other than the cationic polymer, there are problems that the preparation is difficult to remove by hand, the preparation becomes cloudy, and the high-temperature stability is insufficient.
Further, cosmetics containing a fatty acid salt, a cationic polymer, and a nonionic surfactant have been proposed (see, for example, Patent Document 3). However, in the above proposal, since the content of the fatty acid salt is small, there is a problem that the amount of foam and the creaminess of the foam are insufficient, and the wetness occurs at the end of rinsing.
Furthermore, a liquid skin cleanser composition containing a fatty acid salt and an amphoteric surfactant has been proposed (see, for example, Patent Document 4). However, in the above proposal, since the content of the fatty acid salt is small, the amount of foam, the creaminess of the foam, the moist feeling of the skin after towel drying becomes insufficient, and the skin becomes wet at the end of rinsing. There is a problem.

  Therefore, ease of handling of the preparation, transparency, and high temperature stability, high amount of foam, creaminess of foam, lack of moist skin at the end of rinsing, and moist skin after towel drying It is desired to provide a liquid skin cleanser composition that can satisfy all of the feelings.

JP 2006-56802 A Japanese Patent Laying-Open No. 2015-74621 JP 2004-231543 A JP 2006-182698 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 excellent in ease of handling of the preparation, transparency, and high temperature stability, has a large amount of foam, creamy properties of foam, lack of wet skin at the end of rinsing, and after towel drying An object of the present invention is to provide a liquid skin cleanser composition having good moist skin feeling.

  In order to solve the above-mentioned problems, the present inventors have conducted extensive studies, and as a result, (A) higher fatty acid salt, (B) cationic polymer, (C) (meth) acrylic acid alkyl- (meth) acrylic acid copolymer. A liquid skin cleanser composition containing a polymer, (D) polyoxyethylene alkyl ether, and (E) a polyhydric alcohol has a synergistic effect of each component, so that the preparation is easy to take, transparency, and It has been found that it is excellent in high temperature stability, has a large amount of foam, creamy properties of foam, no wet skin at the end of rinsing, and excellent moist feeling after towel drying.

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 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) (meth) acrylic acid alkyl- (meth) acrylic acid copolymer 0.2 mass% to 1.5 mass%,
(D) 0.1% by mass to 2% by mass of polyoxyethylene alkyl ether, and (E) at least one polyhydric alcohol 5 selected from propylene glycol, glycerin, 1,3-butylene glycol, and dipropylene glycol. Containing 20% by mass to 20% by 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 alkyl group of the structural unit derived from the alkyl (meth) acrylate in the alkyl (meth) acrylate- (meth) acrylic acid copolymer of the component (C) has 1 to 4 carbon atoms,
The polyoxyethylene alkyl ether of the component (D) is a polyoxyethylene alkyl ether having an alkyl group having 12 carbon atoms and an average addition mole number of ethylene oxide of 19 to 50, or an alkyl group having 16 carbon atoms. And a mixture of 20 to 40, and a polyoxyethylene alkyl ether having an average added mole number of ethylene oxide of 20 to 40.
<2> The liquid skin cleanser composition according to <1>, further including (F) an amphoteric surfactant and at least one surfactant selected from lauryldimethylamine oxide.

  According to the present invention, the conventional problems can be solved, the object can be achieved, the preparation is easy to take, transparency, and high temperature stability, the amount of foam is large, It is possible to provide a liquid skin cleanser composition having good creaminess, no slick skin at the end of rinsing, and good skin moist feeling 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) a copolymer, (D) a polyoxyethylene alkyl ether, and (E) a polyhydric alcohol. And (F) a surfactant 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 these, potassium ions are preferable from the viewpoint of the amount of foam and creamy properties 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 added separately to the compounding tank and neutralized to give 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 lack of wet skin at the end of rinsing may be insufficient, and when the content exceeds 32% by mass. The moist feeling of the 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%-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 content of the laurate, myristate, and palmitate is outside the numerical range, the amount of foam, creaminess of the foam, and the absence of skin wetness at the end of rinsing, In addition, 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, but is 20% by mass with respect to the total amount of the higher fatty acid salt in terms of the amount of foam. 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 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 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 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 may be insufficient. When the content exceeds 3% by mass, the amount of foam becomes insufficient. Sometimes.

<(C) Copolymer>
The copolymer of the component (C) is an alkyl (meth) acrylate- (meth) acrylic acid copolymer, and is contained in order to improve ease of taking the preparation.
Carbon number of the alkyl group of the structural unit derived from the alkyl (meth) acrylate in the copolymer of the said (C) component is 1-4, and 2-4 are preferable.
As the copolymer of the component (C), one structural unit derived from alkyl (meth) acrylate may be used alone, or two or more structural units may be used.
Specific examples of the copolymer of component (C) include methacrylic acid-ethyl acrylate-butyl acrylate copolymer, ethyl acrylate-methyl methacrylate copolymer, ethyl acrylate-ethyl methacrylate-acrylic acid. A copolymer, a butyl acrylate-ethyl methacrylate copolymer, etc. are mentioned. These may be used individually by 1 type and may use 2 or more types together.

As the copolymer of the component (C), an appropriately synthesized product or a commercially available product may be used. Examples of the commercially available products include the following.
・ Reoir MS-200 (component name: methacrylic acid-ethyl acrylate-butyl acrylate copolymer, manufactured by Lion Specialty Chemicals Co., Ltd., methacrylic acid: ethyl acrylate: butyl acrylate = 33: 63: 4 (molar ratio)) )
・ Rubiflex Soft (component name: methacrylic acid-ethyl acrylate copolymer, manufactured by BASF)
Among these, from the viewpoint of easy handling of the preparation, Reoar MS-200 is preferable.

  The content of the copolymer of the component (C) is 0. 0 with respect to the total amount of the liquid skin cleansing composition from the viewpoint of ease of handling of the preparation, transparency, and high-temperature stability. It is 2 mass%-1.5 mass%, and 0.5 mass%-1.2 mass% are preferable. If the content is less than 0.2% by mass, the preparation may be insufficiently easy to handle, and if it exceeds 1.5% by mass, transparency and high-temperature stability are poor. May be sufficient.

<(D) Polyoxyethylene alkyl ether>
The polyoxyethylene alkyl ether of the component (D) is contained in order to improve transparency and high temperature stability.
The polyoxyethylene alkyl ether of the component (D) is a polyoxyethylene alkyl ether having 12 carbon atoms and an average added mole number of ethylene oxide of 19 to 50 (hereinafter referred to as “polyoxyethylene alkyl ether”). (May be referred to as (d1) ”), or a polyoxyethylene alkyl ether in which the carbon number of the alkyl group is any one of a mixture of 16 and 20 to 40, and the average added mole number of ethylene oxide is 20 to 40 ( Hereinafter, it may be referred to as “polyoxyethylene alkyl ether (d2)”.

-Polyoxyethylene alkyl ether (d1)-
The carbon number of the alkyl group of the polyoxyethylene alkyl ether as the component (d1) is 12.
The average addition mole number of ethylene oxide of the polyoxyethylene alkyl ether of the component (d1) is 19 to 50 in terms of transparency, high temperature stability, and moist feeling after towel drying, and 20 to 20 40 is preferred. When the average added mole number of ethylene oxide is less than 19, transparency and high-temperature stability may be insufficient, and when it exceeds 50, the moist feeling of the skin after towel drying becomes insufficient. There is.

-Polyoxyethylene alkyl ether (d2)-
As carbon number of the alkyl group of the polyoxyethylene alkyl ether of the said (d2) component, it is either 16 and the mixture of 20-40.
As the average addition mole number of ethylene oxide of the polyoxyethylene alkyl ether of the component (d2), when the carbon number is 16, from the viewpoint of transparency, high temperature stability, and moist feeling of the skin after towel drying, It is 20-40, and 20-30 are preferable. When the average added mole number of ethylene oxide is less than 20, transparency and high-temperature stability may be insufficient, and when it exceeds 40, the moist feeling of the skin after towel drying may be insufficient. There is. When the number of carbon atoms is 20 to 40, 40 is preferable as the average added mole number of ethylene oxide from the viewpoint of transparency and high temperature stability. When the average added mole number of ethylene oxide is less than 40, transparency and high-temperature stability may be insufficient, and it is difficult to obtain one having an average added mole number of ethylene oxide exceeding 40.

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 the following.
EMALEX 120 (POE (20) cetyl ether), EMALEX 130 (POE (30) cetyl ether), EMALEX 720 (POE (20) lauryl ether), EMALEX 750 (POE (50) lauryl ether) (above, Nihon 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 Oil & Fat 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 the total amount of the liquid skin cleansing composition from the viewpoints of a large amount of foam, creamy property of foam, transparency, and high temperature stability. On the other hand, it is 0.1 mass%-2 mass%, and 0.2 mass%-1 mass% are preferable. When the content is less than 0.1% by mass, transparency and high-temperature stability may be insufficient. When the content exceeds 2% by mass, the amount of foam is large and the creamy property of foam. May be insufficient.

<(E) Polyhydric alcohol>
The polyhydric alcohol as the component (E) is contained in order to improve transparency, high temperature stability, and moist feeling on the skin after towel drying.
The polyhydric alcohol as the component (E) is at least one selected from propylene glycol, glycerin, 1,3-butylene glycol, and dipropylene glycol. Among these, propylene glycol is preferable from the viewpoint of transparency. Moreover, when it contains 2 or more types of the polyhydric alcohol of the said (E) component, it is preferable to contain propylene glycol and glycerol.
The content of the polyhydric alcohol as the component (E) includes the liquid skin in terms of the amount of foam, creaminess of the foam, transparency, moist feeling of the skin after towel drying, and high temperature stability. They are 5 mass%-20 mass% with respect to the whole quantity of a cleaning composition, and 8 mass%-15 mass% are preferable. When the content is less than 5% by mass, transparency, moist feeling of the skin after towel drying, and high-temperature stability may be insufficient. When the content exceeds 20% by mass, the amount of foam is large. In addition, the creaminess of the foam may be insufficient.

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

The surfactant of the component (F) 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.
As said (F) component, a betaine amphoteric surfactant is preferable at the point of the speed of foaming, and the non-stickiness at the end of a rinse.
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 (F) is 0.5% with respect to the total amount of the liquid skin cleanser composition from the viewpoint of the speed of foaming and the lack of sliminess of the skin at the end of rinsing. % By mass to 5% by mass is preferable, and 0.7% by mass to 3% by mass is more preferable. 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 wetness at the end of rinsing may be insufficient. There is.

<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 (C), a viscosity modifier, an oil component, a lower alcohol, a higher alcohol, and the like. Lanolin derivatives, protein derivatives, acrylic resin dispersions, drugs such as vitamins, bactericides, preservatives, pH adjusters, antioxidants, sequestering agents, UV absorbers, animal or plant extracts or their derivatives, pigments, fragrances And water-insoluble polymer powders such as pigments, inorganic powders, clay minerals, 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. In purified water heated to 70 ° C. to 80 ° C., higher fatty acid salt of component (A), alkyl (meth) acrylate- (meth) acrylic acid copolymer of component (C), component (D) The polyoxyethylene alkyl ether and the polyhydric alcohol of the component (E) are dissolved and cooled to 40 ° C. or lower, and then the cationic polymer of the component (B) and the (F) as necessary. ) Component surfactants can be added.
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 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 1 minute with a rotor of 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 as said container, 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 is excellent in ease of handling of the preparation, transparency, and high-temperature stability, has a large amount of foam, creamy properties of foam, and does not cause skin to become wet at the end of rinsing. And, since the moist feeling of the skin after towel drying 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 1-36 and Comparative Examples 1-21)
The liquid skin cleansing compositions having the compositions and contents shown in Tables 1 to 10 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 finally obtained is heated to 70 ° C. to 80 ° C., and (A) the higher fatty acid salt, (C) the co-weight of the component Liquid skin cleansing by dissolving polyoxyethylene alkyl ether of component (D) and polyhydric alcohol of component (E) and cooling to 40 ° C. or lower after adding the cationic polymer of component (B) An agent composition was prepared. Thereafter, if the pH is not reached, potassium hydroxide, which is a common component, is added. 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 1-36 and Comparative Examples 1-21 is a container with a pump dispenser [discharge amount 3mL, nozzle aperture (inner diameter) 3.5 mm, manufactured by Yoshino Kogyo Co., Ltd. ].

  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 moistness after towel drying, “ease of taking the preparation into the hand”, “transparency”, and “high temperature stability” were evaluated. The results are shown in Tables 1 to 10 below.

<The amount of foam, creamy nature of foam>
Ten expert evaluators wet the 40 ° C warm water and lightly damp nylon towel 2 pushes (about 6g) of liquid skin cleansing compositions of Examples 1-36 and Comparative Examples 1-21 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 or more, “the amount of foam” and “the creaminess of foam” are good.
-Evaluation criteria for "large 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 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 nylon towel 2 pushes (about 6g) of liquid skin cleansing compositions of Examples 1-36 and Comparative Examples 1-21 Take 10 times and lather, and after rubbing the whole body with the nylon towel, immediately rinse the liquid skin cleansing composition with warm water of 40 ° C. Evaluation was performed according to the 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, "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. In addition, if the average evaluation score is 3.0 points or more, “the absence of luster at the end of rinsing” is good.
-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 nylon towel 2 pushes (about 6g) of liquid skin cleansing compositions of Examples 1-36 and Comparative Examples 1-21 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

<Ease of handing the formulation>
Ten professional evaluators put 2 liquid skin cleansing compositions of Examples 1 to 36 and Comparative Examples 1 to 21 in their hands by pressing the dispenser at a speed of 1 push per second and placing it under the dispenser. When taking a push (about 6 g), “easiness of taking the preparation in the hand” was evaluated according to the following evaluation criteria. As a result, an average evaluation score of 10 professional evaluators was obtained, and “easiness of taking the preparation in the hand” was evaluated according to the following criteria. Here, “formulation” refers to a liquid skin cleanser composition, and if the average evaluation score is 4.0 points or more, “easiness of taking the formulation in the hand” is good.
-Evaluation criteria-
5 points: The formulation does not spill from the hand and can be taken 100%. 4 points: The formulation slightly spills from the hand, but 70% or more and less than 100% can be taken by hand. 3 points: The preparation spills from the hand, but 50% or more and less than 70% can be picked up in the hand 2 points: The preparation spills a lot from the hand, but 20% or more and less than 50% can be taken in the hand 1 point: The preparation Almost spills from the hand and can be picked up by less than 20% -Criteria-
◎: 4.5 points or more and 5.0 points ○: 4.0 points or more and less than 4.5 points △: 3.0 points or more and less than 4.0 points ×: Less than 3.0 points

<Transparency>
Into a cylindrical transparent glass bottle with a diameter of 4 cm and a height of 7.5 cm, the liquid skin cleansing compositions of Examples 1 to 36 and Comparative Examples 1 to 21 are placed up to the mouth of the glass bottle, and the back of the glass bottle is close to the pocket size. A visual acuity card 40 cm (manufactured by TMI Co., Ltd.) was placed, the mark in the card was observed, and “transparency” was evaluated according to the following evaluation criteria. As a result, an average evaluation score of 10 professional evaluators was obtained, and “transparency” was evaluated according to the following criteria. In addition, if the average evaluation score is 4.0 points or more, “transparency” is good.
-Evaluation criteria-
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 -Criteria-
◎: 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

<High temperature stability>
50 mL of each liquid skin cleanser composition of Examples 1-36 and Comparative Examples 1-21 was placed in a 50 mL capacity transparent glass bottle (Screw bottle SV-50A, manufactured by Nidec Rika Glass Co., Ltd.), and the lid of the glass bottle was closed. And sealed and stored at 50 ° C. for 30 days. After storage, 10 expert evaluators put a pocket-sized near vision card 40cm (manufactured by TMI Co., Ltd.) on the back of the glass bottle, observe the mark in the card, and "high temperature stability" according to the following evaluation criteria Evaluated. As a result, an average evaluation score of 10 professional evaluators was obtained, and “high temperature stability” was evaluated according to the following criteria. In addition, if the average evaluation score is 3.0 points or more, the “high temperature stability” is good.
-Evaluation criteria-
5 points: Mark clearly confirmed, not separated 4 points: Slightly turbid but mark confirmed, not separated 3 points: Slightly cloudy, mark difficult to confirm, separated No 2 points: Cloudy, mark is almost unidentifiable and partly separated 1 Point: Very cloudy, mark is completely unidentifiable and separated -Criteria-
◎: 4.0 points or more ○: 3.0 points or more and less than 4.0 points △: 2.0 points or more and less than 3.0 points ×: Less than 2.0 points

(Examples 37 to 80)
Liquid skin cleansing compositions having the compositions and contents shown in the following Tables 11 to 18 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 finally obtained is heated to 70 ° C. to 80 ° C., and (A) the higher fatty acid salt, (C) the co-weight of the component The polymer, the polyoxyethylene alkyl ether of component (D), and the polyhydric alcohol of component (E) are dissolved and cooled to 40 ° C. or lower, and then the cationic polymer of component (B) and component (F) A liquid skin cleansing composition was prepared by adding a 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 (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 37-80 was filled in 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, 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” , “Moist skin feeling after towel drying”, “Ease of handing of the preparation”, “Transparency”, and “High temperature stability” were evaluated. Furthermore, in addition to the above evaluation, “fastness of foaming” was evaluated as follows. The results are shown in Tables 11 to 18 below.

<Speed of foaming>
Ten expert evaluators take 2 pushes (about 6 g) of the liquid skin cleansing compositions of Examples 37 to 80 in a nylon towel wetted and lightly dampened, and rub the nylon towel 10 times to foam. The foaming was observed and 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 19 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.).
* 5: Triethanolamine laurate is obtained by neutralizing 100% of lauric acid (NAA-122, manufactured by NOF Corporation) with triethanolamine (triethanolamine, manufactured by Nippon Shokubai Co., Ltd.). .
* 6: Myristic acid triethanolamine is 100% neutralized myristic acid (NAA-142, NOF Corporation) using triethanolamine (Triethanolamine, Nippon Shokubai Co., Ltd.). .
* 7: Triethanolamine palmitate is obtained by neutralizing palmitic acid (NAA-160, manufactured by NOF Corporation) with triethanolamine (triethanolamine, manufactured by Nippon Shokubai Co., Ltd.) 100%. .
* 8: The solid content concentration of the methacrylic acid-ethyl acrylate copolymer emulsion is 30% by mass.
* 9: The solid content concentration of the methacrylic acid-ethyl acrylate-butyl acrylate copolymer emulsion is 25% by mass.
In addition, the content of the (B) component, the (B) comparison component, and the (C) component in Tables 1 to 18 is a value converted into a pure component.

-(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. 4, 30 rotations / minute, 25 ° C
* 3: Brookfield viscometer LVF (manufactured by Brookfield), spindle no. 4, 60 rotations / minute, 25 ° C
* 4: Brookfield viscometer LVF (manufactured by Brookfield), spindle no. 4, 10 rotations / minute, 25 ° C

  The liquid skin cleanser composition of the present invention is excellent in ease of handling of the preparation, transparency, and high-temperature stability, has a large amount of foam, creamy properties of foam, and does not cause skin to become wet at the end of rinsing. And, since the moist feeling of the skin after towel drying is good, it is preferably used for, for example, face wash, hand soap, body soap, cleansing foam, makeup remover, etc., and particularly preferably used for body soap.

Claims (2)

(A) 10% by mass to 32% by mass of a higher fatty acid salt containing all of laurate, myristic acid, and palmitic acid,
(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) (meth) acrylic acid alkyl- (meth) acrylic acid copolymer 0.2 mass% to 1.5 mass%,
(D) 0.1% by mass to 2% by mass of polyoxyethylene alkyl ether, and (E) at least one polyhydric alcohol 5 selected from propylene glycol, glycerin, 1,3-butylene glycol, and dipropylene glycol. Containing 20% by mass to 20% by 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 alkyl group of the structural unit derived from the alkyl (meth) acrylate in the alkyl (meth) acrylate- (meth) acrylic acid copolymer of the component (C) has 1 to 4 carbon atoms,
The polyoxyethylene alkyl ether of the component (D) is a polyoxyethylene alkyl ether having an alkyl group having 12 carbon atoms and an average addition mole number of ethylene oxide of 19 to 50, or an alkyl group having 16 carbon atoms. And a mixture of 20 to 40 and a polyoxyethylene alkyl ether having an average added mole number of ethylene oxide of 20 to 40.   The liquid skin cleansing composition according to claim 1, further comprising (F) an amphoteric surfactant and at least one surfactant selected from lauryl dimethylamine oxide.