JP7333686B2 - Foam container containing skin cleanser composition - Google Patents

Description

The present invention relates to a skin cleanser composition in a foamer container.

From the viewpoint of usability, foam container-packed skin cleansing compositions are characterized by fineness of foam (hereinafter sometimes referred to as "texture of foam"), elasticity of foam, shape retention of foam, and the like. Performance is an important factor, and so far, various studies have been conducted, such as increasing the amount of various active agents and combinations thereof, and attempts have been made to improve foam performance (see, for example, Patent Documents 1 and 2).

A technique for improving foam performance by combining an anionic surfactant with an amphoteric surfactant has also been proposed (see, for example, Patent Document 3).
According to the above proposal, although excellent lather performance can be achieved, the combination of anionic and amphoteric surfactants increases the formulation viscosity, which results in a pressing force during lather ejection from the pump. and a decrease in foam performance (especially foam texture), resulting in poor dischargeability from the foamer container.

Therefore, there is a strong demand for rapid development of a skin cleanser composition in a foamer container that has good foam fineness, foam elasticity, and foam shape retention, and is also excellent in dischargeability from the foamer container. It is the current situation.

JP 2011-148772 A JP 2015-229761 A JP 2014-76975 A

An object of the present invention is to solve the above-mentioned conventional problems and to achieve the following objects. That is, the present invention has good foam fineness, foam elasticity, and foam shape retention (hereinafter these may be collectively referred to as "foam performance"), and the foam from the foamer container is good. It is an object of the present invention to provide a skin cleanser composition packed in a foamer container which is also excellent in dischargeability (hereinafter sometimes referred to as "foam dischargeability").

As a result of extensive studies by the present inventors to solve the above problems, (A) polyoxyethylene alkyl ether sulfate, (B) amphoteric surfactant, and (C ) ethylene oxide having an average added mole number of 10 to 30 polyoxyethylene hydrogenated castor oil, and the mass ratio of the total amount of the content of the component (A) and the content of the component (B) to the content of the component (C) When {(A+B)/C} was blended so as to be 2 to 10, it was found that both good performance of foam discharged from the foamer container and good dischargeability from the foamer container could be achieved. .

The present invention is based on the findings of the present inventors, and means for solving the above problems are as follows. Namely
<1> (A) a polyoxyethylene alkyl ether sulfate;
(B) an amphoteric surfactant;
(C ) a polyoxyethylene hydrogenated castor oil having an ethylene oxide average addition mole number of 10 to 30,
The mass ratio {(A+B)/C} of the total amount of the content of the component (A) and the content of the component (B) to the content of the component (C) is 2 to 10. It is characterized by a skin cleanser composition in a foamer container.
<2> The content of the component (A) is 10% by mass to 16% by mass,
The content of the component (B) is 1% by mass to 2% by mass,
The skin cleanser composition in a foamer container according to <1>, wherein the content of the component (C) is 2% by mass to 4% by mass.
<3> Any one of <1> to <2> above, wherein the mass ratio (A/B) between the content of the component (A) and the content of the component (B) is 3 to 15. is a skin cleanser composition in a foam container.
<4> The skin cleanser composition in a foamer container according to any one of <1> to <3>, which has a viscosity of 5 mPa·s to 35 mPa·s at 25°C.

According to the present invention, a skin cleanser composition packaged in a foamer container can solve the above-mentioned problems in the conventional art, achieve the above-mentioned objects, and has good foam performance and excellent dischargeability from the foamer container. can be provided.

(Skin cleanser composition in foamer container)
The skin cleanser composition in a foam container of the present invention comprises (A) a polyoxyethylene alkyl ether sulfate, (B) an amphoteric surfactant, and (C ) a poly(ethylene oxide) having an average addition mole number of 10 to 30. Oxyethylene hydrogenated castor oil and, if necessary, other ingredients.

<(A) Polyoxyethylene alkyl ether sulfate>
The polyoxyethylene alkyl ether sulfate of component (A) is mainly contained to improve foam performance.

The polyoxyethylene alkyl ether sulfate of component (A) is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include compounds represented by the following general formula (1). The polyoxyethylene alkyl ether sulfate of component (A) may be used singly or in combination of two or more.
R ¹ —O(CH ₂ —CH ₂ O)n—SO ₃ X General formula (1)

In general formula (1), R ¹ represents an alkyl group, and the number of carbon atoms in the alkyl group portion is preferably 10 to 14, more preferably 12 to 14, from the viewpoint of foam performance.

In the general formula (1), n represents the average number of added moles of ethylene oxide, and the average number of added moles of ethylene oxide is preferably 1 to 5, more preferably 1 to 3, from the viewpoint of foam performance. .

In the general formula (1), X represents an alkali metal, ammonium, or organic ammonium.
The alkali metal is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include sodium and potassium.
The organic ammonium is not particularly limited and can be appropriately selected depending on the purpose. Examples thereof include organic ammonium derived from alkanolamine such as monoethanolamine, diethanolamine and triethanolamine.
Among these, X is preferably an alkali metal, more preferably sodium, from the viewpoint of foam performance.

Specific examples of the polyoxyethylene alkyl ether sulfate of component (A) include polyoxyethylene (1) sodium lauryl ether sulfate and polyoxyethylene (2) sodium lauryl ether sulfate (also known as POE (2) sodium laureth sulfate). ), polyoxyethylene (3) sodium lauryl ether sulfate (also known as POE (3) sodium laureth sulfate), polyoxyethylene (4) sodium lauryl ether sulfate, polyoxyethylene (5) sodium lauryl ether sulfate, polyoxyethylene ( 3) sodium alkyl (C12,13) ether sulfate, polyoxyethylene (2) ammonium lauryl ether sulfate, polyoxyethylene (3) ammonium lauryl ether sulfate, and the like.
In addition, the numerical value in said () represents the average added mole number (n) of ethylene oxide.

A commercially available product can also be used as the polyoxyethylene alkyl ether sulfate of the component (A).
Examples of commercially available polyoxyethylene alkyl ether sulfates of component (A) include Texapon N28AS 270N (manufactured by BASF), Emal 270J, and Emal 20C (manufactured by Kao Corporation).

The content of the polyoxyethylene alkyl ether sulfate of component (A) is the total amount of the skin cleanser composition in the foamer container, from the viewpoints of foam performance, lack of sliminess after rinsing, and dischargeability from the foamer container. 5% by mass to 18% by mass is preferable, and 10% by mass to 16% by mass is more preferable. When the content is 5% by mass or more, the foam performance is good, and when it is 18% by mass or less, the lack of sliminess after rinsing and the dischargeability from the foamer container are good.

<(B) Amphoteric Surfactant>
The amphoteric surfactant, component (B), is mainly contained to improve foam performance.

The amphoteric surfactant of component (B) is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include betaine amphoteric surfactants and amino acid amphoteric surfactants. These may be used individually by 1 type, and may use 2 or more types together. Among these, betaine-type amphoteric surfactants are preferred from the viewpoint of foam performance.

The betaine-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the intended purpose. agents, imidazoline type amphoteric surfactants, and the like. These may be used individually by 1 type, and may use 2 or more types together.

The alkylbetaine type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the intended purpose. Examples thereof include betaine lauryldimethylaminoacetate, coconut oil alkylbetaine, and betaine stearyldimethylaminoacetate. These may be used individually by 1 type, and may use 2 or more types together.

The amidobetaine-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the intended purpose. are mentioned. These may be used individually by 1 type, and may use 2 or more types together.

The sulfobetaine-type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the intended purpose. are mentioned. These may be used individually by 1 type, and may use 2 or more types together.

The imidazoline type amphoteric surfactant is not particularly limited and can be appropriately selected depending on the intended purpose. and acyl-N'-carboxymethyl-N'-hydroxyethylethylenediamine sodium. These may be used individually by 1 type, and may use 2 or more types together.

Among these, alkylbetaine-type amphoteric surfactants and sulfobetaine-type amphoteric surfactants are preferable, and lauryldimethylaminoacetate betaine, coconut oil alkylbetaine, and laurylhydroxysulfobetaine are more preferable, from the viewpoint of foam performance.

A commercially available product can also be used as the amphoteric surfactant of component (B).
Commercially available amphoteric surfactants of component (B) include, for example, alkylhydroxysulfobetaines such as Amphithol 20HD (manufactured by Kao Corporation), Softazolin LSB (manufactured by Kawaken Fine Chemicals Co., Ltd.), and alkyldimethylaminoacetic acid betaine. As, Amphitol 24B (manufactured by Kao Corporation), Nissan Anon BL (manufactured by NOF Corporation), NIKKOL AM-301 (manufactured by Nikko Chemicals Co., Ltd.), Amogen S (manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), Obazolin LB ( Toho Chemical Industry Co., Ltd.), Rikavion A-100 (manufactured by Shin Nippon Rika Co., Ltd.), Amipol N (manufactured by Nicca Chemical Co., Ltd.), Bister ML (manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd.) Amphitol 86B (manufactured by Kao Corporation) , Rikavion A-700 (manufactured by New Japan Chemical Co., Ltd.), Nissan Anon BF (manufactured by NOF Corporation), and the like.

The content of the amphoteric surfactant as component (B) is from 0.5% by mass to the total amount of the skin cleanser composition in the foamer container, from the viewpoint of foam performance and dischargeability from the foamer container. 3% by mass is preferred, and 1% to 2% by mass is more preferred. When the content is 0.5% by mass or more, foam performance is good, and when the content is 3% by mass or less, dischargeability from the foamer container is good.

<Mass ratio (A/B)>
The mass ratio (A/B) between the content (% by mass) of the component (A) and the content (% by mass) of the component (B) is preferably 3 to 15 from the viewpoint of foam performance. 5 to 10 are more preferred.

<(C ) Polyoxyethylene hydrogenated castor oil having an average added mole number of ethylene oxide of 10 to 30>
The polyoxyethylene hydrogenated castor oil having an average added mole number of ethylene oxide of component (C) of 10 to 30 is mainly contained in order to improve dischargeability from the former container.

The average number of moles of ethylene oxide added to component (C) is 10 to 30, preferably 10 to 20, from the viewpoints of foam performance and dischargeability from the foamer container. If the average number of added moles of ethylene oxide is less than 10, the foam performance will be insufficient, and if it exceeds 30, the foam performance and dischargeability from the foamer container will be insufficient.
The polyoxyethylene hydrogenated castor oil having an average added mole number of ethylene oxide of component (C) of 10 to 30 may be used alone or in combination of two or more.

A commercially available polyoxyethylene hydrogenated castor oil having an average number of moles of added ethylene oxide of component (C) of 10 to 30 can also be used.
Examples of commercial products of polyoxyethylene hydrogenated castor oil having an ethylene oxide average added mole number of component (C) of 10 to 30 include, for example, polyoxyethylene (10) hydrogenated castor oil, NIKKOL HCO-10 (Nikko Chemicals Co., Ltd.), EMALEX HC-10 (manufactured by Nippon Emulsion Co., Ltd.), BLAUNON CW-10 (manufactured by Aoki Oil Co., Ltd.), polyoxyethylene (20) as hydrogenated castor oil, NIKKOL HCO-20 (manufactured by Nikko Chemicals Co., Ltd. ), EMALEX HC-20 (manufactured by Nippon Emulsion Co., Ltd.), BLAUNON RCW-20 (manufactured by Aoki Oil Co., Ltd.), polyoxyethylene (30) as hydrogenated castor oil, NIKKOL HCO-30 (manufactured by Nikko Chemicals Co., Ltd.), EMALEX HC-30 (manufactured by Nippon Emulsion Co., Ltd.) and the like.
In addition, the numerical value in () represents the said ethylene oxide average added mole number.

The content of the polyoxyethylene hydrogenated castor oil having an ethylene oxide average added mole number of 10 to 30 as the component (C) is determined in terms of foam performance, lack of sliminess after rinsing, and dischargeability from the foamer container. Therefore, it is preferably 1% by mass to 6% by mass, more preferably 2% by mass to 4% by mass, based on the total amount of the skin cleanser composition in a foamer container. When the content is 1% by mass or more, dischargeability from the foamer container is good, and when it is 6% by mass or less, foam performance and no sliminess after rinsing are good.

<Mass ratio {(A + B)/C}>
The total amount of the content (% by mass) of the component (A) and the content (% by mass) of the component (B), and the mass ratio of the content (% by mass) of the component (C) {(A+B) /C} is 2 to 10, preferably 3 to 6, from the viewpoint of foam performance and dischargeability from the foamer container. If the mass ratio {(A+B)/C} is less than 2, the performance of the foam may be insufficient, and if it exceeds 10, the dischargeability from the foamer container may be insufficient.

<Other ingredients>
In addition to the components (A) to (C), the skin cleanser composition in a foamer container may contain other components as long as the effects of the present invention are not impaired.
The other components are not particularly limited, and can be appropriately selected from those commonly used in skin cleansing compositions in foam containers. Alcohols such as lower or higher alcohols, lanolin derivatives, protein derivatives, acrylic resin dispersions, cationic polymers, anionic polymers, nonionic polymers, drugs such as vitamins, disinfectants, preservatives, pH adjusters, antioxidants , sequestering agents, ultraviolet absorbers, animal and plant extracts and their derivatives, dyes, fragrances, pigments, inorganic powders, clay minerals, water-insoluble polymer powders such as nylon and polyethylene, and water. These may be used individually by 1 type, and may use 2 or more types together.
A commercial item can also be used for said other component.
The content of the other components in the skin cleanser composition in a foamer container is not particularly limited, and can be appropriately selected according to the purpose.

-pH-
The pH of the skin cleanser composition in a foam container at 25° C. is preferably 4 to 6 from the viewpoint of fineness of foam. The pH of the skin cleanser composition in a foam container can be adjusted by adding at least one of potassium hydroxide, citric acid and the like while finally checking the pH after mixing all the components. More specifically, purified water is balanced and mixed and stirred so that the total content of components other than at least one of potassium hydroxide and citric acid is about 90% by mass. May be warmed if necessary. An aqueous solution of at least one of potassium hydroxide and citric acid is gradually added during mixing and stirring, and added until the target pH is reached while measuring the pH. When the target pH is reached, the remaining purified water is finally added to make the total 100% by mass, and the final pH is measured.

-viscosity-
The viscosity of the skin cleanser composition in a foamer container is preferably 35 mPa·s or less at 25° C., for example, in the case of using a foamer container having two 200-mesh screens, from the viewpoint of dischargeability from the foamer container. 5 mPa·s to 35 mPa·s is more preferable, and 5 mPa·s to 25 mPa·s is particularly preferable.

The viscosity is measured by storing the skin cleanser composition in a foamer container at 25° C., setting it in, for example, a BL-type viscometer (rotor No. 1, manufactured by Tokyo Keiki Co., Ltd.), and rotating the rotor at a rotation speed of 60 rpm. , can be measured 1 minute after the start of rotation of the rotor.

-former container-
The foamer container is not particularly limited as long as it can mix the skin cleanser composition in the foamer container with air and discharge it in a foamed state, and can be appropriately selected according to the purpose. For example, there is a foamer container that can discharge foam by pushing down the pump part. As such a former container, for example, one manufactured by Yoshino Kogyosho Co., Ltd. can be used.

The foamer container usually has a porous membrane for forming foam, and foam is formed by passing the skin cleanser composition in the foamer container through the porous membrane. Examples of materials for the porous membrane include plastic materials such as nylon, polyester, and polyolefin. The mesh of the porous membrane is preferably 100 to 400 mesh from the viewpoint of ease of pushing the pump of the foamer container and fineness of the foam. When the mesh of the porous membrane is 100 mesh or more, fineness of the foam is good, and when it is 400 mesh or less, the pump of the foamer container is easy to push.

The number of the porous membranes is preferably 2 to 4 in terms of ease of pushing the pump of the foamer container and fineness of the foam. When the number of the porous membrane bodies is two or more, fineness of the foam is good, and when the number is four or less, the pump of the foamer container is easy to push. More specifically, the containers described in JP-A-7-315463, JP-A-8-230961, and JP-A-2005-193972 can be preferably used. The volume ratio of the skin cleanser composition to air (skin cleanser composition/air) is preferably 1/5 to 1/20.

-Applications-
The skin cleanser composition in a foamer container is suitable for products such as hand soap, body soap, facial cleansing foam, and the like. When the skin cleanser composition in a foamer container is used in a normal dosage and in a normal washing method according to these uses, it is advantageous in that good foaming performance and good dischargeability from the foamer container can be achieved. be. In addition, the skin cleansing composition in a foamer container has good non-stickiness after rinsing when used.

-Production method-
The skin cleanser composition in a foam container contains, for example, the components (A) to (C), the other components, and water (the remaining amount is blended so that the total skin cleanser composition is 100% by mass). can be produced by mixing The device for producing the skin cleanser composition in a foamer container is not particularly limited and can be appropriately selected according to the purpose. Stirring devices with blades may be mentioned. The components (A) to (C) and the other components may be used alone or in combination of two or more in preparing the skin cleanser composition in a foamer container. You may use it in the state of the mixture containing.

EXAMPLES The present invention will be described in more detail below based on examples and comparative examples, but the present invention is not limited to the following examples.

The content of each component described in Examples and Comparative Examples is shown in mass %, and all values are converted to pure content.
In addition, the content (% by mass) of component (A) and the content (% by mass) of component (B) are mass ratio (A/B), and the content (% by mass) of component (A) and the above The total amount (% by mass) of the content (% by mass) of the component (B) and the mass ratio {(A + B)/C} of the content (% by mass) of the component (C) is to the second decimal place. The figures are rounded off to the first decimal place and listed.
The pH was adjusted to 5.2 with citric acid. The pH was measured at 25°C by a general-purpose method specified in the Japanese Pharmacopoeia.
Viscosity was determined by measuring the skin cleanser composition in a 100 mL hard glass vial (trade name: "SV-100A", manufactured by Nichiden Rika Glass Co., Ltd.) at a constant temperature of 25 ° C. with a BL type viscometer (Tokyo Keiki Co., Ltd.). rotor No. 1 for 100 mPa s or less, and rotor No. 2 for 100 mPa s to 500 mPa s), rotate the rotor at a speed of 60 rpm, and start rotating the rotor. Viscosity measured after 1 minute.

[Examples 1 to 19 and Comparative Examples 1 to 7]
Skin cleansing compositions having compositions and contents shown in Tables 1 to 4 below were prepared by the following method. First, component (A), component (B), component (C) (or a comparative component for component (C)), and a common component were uniformly mixed at 25°C using a paddle stirrer. At this time, the amount of purified water was adjusted to 90% by mass of the whole. Subsequently, pH was measured using a pH meter HM-30V (manufactured by Toa DKK Co., Ltd.) and adjusted to pH 5.2 using citric acid. When the pH reached 5.2, the remaining purified water was finally added to make the total 100% by mass. As a result of measuring the final pH, the pH was 5.2 in all Examples and Comparative Examples.

Examples 1 to 19 prepared in a former container (2 sheets of 200 mesh, manufactured by Yoshino Kogyo Co., Ltd. (same as the former container used in Example 2 of JP-A-2005-193972)), and Comparative Examples 1 to Each skin cleanser composition of No. 7 was filled to prepare a skin cleanser composition in each foamer container (hereinafter sometimes referred to as "foam dispenser container"). The volume ratio of the skin cleanser composition to air (skin cleanser composition/air) was 1/13.

The prepared skin cleanser compositions in foam containers of Examples 1 to 19 and Comparative Examples 1 to 7 were evaluated as follows for "fineness of foam (texture of foam)," "elasticity of foam," and " Form retention of foam", "non-sliminess after rinsing", and "ejectability from foamer container" were evaluated. The results are shown in Tables 1-4.

<Foam texture, foam elasticity, foam shape retention>
1 g (1 push) of the prepared skin cleanser compositions of Examples 1 to 19 and Comparative Examples 1 to 7 was continuously discharged five times from a foamer container at 25°C. Evaluation was performed by 20 expert panelists based on the following criteria.
[Evaluation criteria]
－Evaluation Criteria for “Foam Texture”－
A: More than 17 out of 20 people answered that the fineness of the foam was good.
○: 13 to 16 out of 20 people answered that the fineness of the foam was good.
△: 8 to 12 out of 20 people answered that the fineness of the foam was good.
x: 7 or less out of 20 people answered that the fineness of the foam was good.
－Evaluation Criteria for “Foam Elasticity”－
A: More than 17 out of 20 people answered that the elasticity of the foam was good.
◯: 13 to 16 out of 20 people answered that the elasticity of the foam was good.
△: 8 to 12 out of 20 people answered that the elasticity of the foam was good.
x: 7 or less out of 20 people answered that the elasticity of the foam was good.
-Evaluation criteria for "foam shape retention"-
⊚: 17 or more out of 20 people answered that the shape retention of the foam was good.
◯: 13 to 16 out of 20 people answered that the shape retention of the foam was good.
△: 8 to 12 out of 20 people answered that the shape retention of the foam was good.
x: 7 or less out of 20 people answered that the shape retention of the foam was good.

<Lack of sliminess after rinsing>
About 6 g of the prepared skin cleansing compositions of Examples 1 to 19 and Comparative Examples 1 to 7 were taken from the foam dispenser container, and after washing the whole body, the skin cleansing compositions were rinsed off, and the skin cleansing compositions were rinsed. Immediately after washing, the "non-smoothness of the skin" was evaluated based on the following evaluation criteria. "Skin non-greasy" refers to the condition in which the composition does not remain on the skin and does not feel slimy after rinsing. Evaluation was performed by 20 expert panelists based on the following criteria.
[Evaluation criteria]
-Evaluation criteria for "no sliminess after rinsing"-
A: More than 17 out of 20 panelists answered that the lack of sliminess after rinsing was good.
○: 13 to 16 out of 20 panelists answered that the lack of sliminess after rinsing was good.
Δ: 8 to 12 out of 20 panelists answered that the lack of sliminess after rinsing was good.
x: 7 or less of 20 panelists answered that the lack of sliminess after rinsing was good.

<Ejectability from former container>
The operation of discharging the prepared skin cleansing compositions of Examples 1 to 19 and Comparative Examples 1 to 7 from the foam dispenser container at 25° C. was repeated 5 times, and dischargeability from the foamer container (foam Ejectability) was evaluated.
[Evaluation criteria]
－Evaluation Criteria for Ejectability from Former Container－
⊚: Fine bubbles can be discharged.
◯: Coarse bubbles are mixed, but slightly fine bubbles can be discharged.
Δ: Slightly coarse bubbles are mixed, fine bubbles cannot be discharged, and there is a problem in terms of quality.
x: No foam is formed, fine-grained foam cannot be discharged, and there is a problem in terms of quality.

Details of each component used in the above Examples and Comparative Examples are shown in Table 5 below.
The numbers in parentheses in Table 5 represent the average number of added moles of ethylene oxide .

The skin cleanser composition in a foamer container of the present invention is excellent in foam performance and dischargeability from the foamer container, and has good non-stickiness after rinsing. It can be used widely.

Claims (2)

(A) a polyoxyethylene alkyl ether sulfate;
(B) an amphoteric surfactant;
(C) a polyoxyethylene hydrogenated castor oil having an ethylene oxide average addition mole number of 10 to 30,
The component (B) is at least one selected from the group consisting of alkylbetaine-type amphoteric surfactants, sulfobetaine-type amphoteric surfactants, and imidazoline-type amphoteric surfactants,
The content of the component (A) is 10% by mass to 16% by mass,
The content of the component (B) is 1% by mass to 2% by mass,
The content of the component (C) is 2% by mass to 4% by mass,
The mass ratio {(A+B)/C} of the total amount of the content of the component (A) and the content of the component (B) to the content of the component (C) is 2 to 10,
A skin cleanser composition packed in a foamer container, wherein the mass ratio (A/B) of the content of the component (A) to the content of the component (B) is 3-15. The skin cleanser composition in a foamer container according to claim 1, which has a viscosity of 5 mPa·s to 35 mPa·s at 25°C.