JP6550855B2 - Personal cleansing composition - Google Patents

Description

  The present invention relates to a personal cleansing composition capable of obtaining good lathering ability and lather quality even when using hard water, and capable of suppressing or eliminating the feeling of firmness after washing.

In the personal cleansing composition, not only the cleansing power to remove stains but also the foam is regarded as important. For example, fine and dense foam acts as a buffer between the skin and hands and towel when rubbing the skin, and has an effect of reducing the friction to the skin, and the fine foam makes it easy to scrape dirt from pores, so washing The effect of increasing power can be expected. Furthermore, good lathering is required, for example, satisfaction can be obtained by bubbling fast and abundantly. Therefore, fatty acid salts are widely used as a cleansing component to be blended in a personal cleansing composition because the cleansing power is high and a good foam (in particular, fine texture and dense foam) can be obtained.
However, particularly when using water of high hardness containing a large amount of minerals such as calcium ions and magnesium ions, there is a problem that the ease of foaming and the foam quality are reduced because fatty acids form salts. Thus, attempts have been made to solve this problem by combining various compounds with fatty acid salts.

  Further, in the body cleansing composition, in addition to the cleansing power and the foam, the sense of washing up is also regarded as important. When washed with a fatty acid salt, the skin may feel as if it had been washed. In general, since this feeling of tension is not a preferred feeling, it is desired to suppress or eliminate the feeling of tension. Furthermore, when the hardness of the water to be used is high, the feeling of tension is particularly strong, so it is more strongly required to suppress or eliminate the feeling of tension.

  For example, Patent Document 1 describes a skin cleansing composition comprising a fatty acid, an acylated amino acid surfactant such as sodium palm fatty acid methyl taurine sodium or lauroyl sarcosine sodium, and a water-insoluble solid powder such as mica or talc. Things are listed. Although this composition improved the feeling of washing after washing, when the water hardness was high, the foamability and foam quality were insufficient.

  Patent Document 2 describes a foaming skin cleanser in which a fatty acid salt, a specific cationized polymer, and an acylmethyl taurate salt are blended, and this cleanser suppresses the feeling of gripping after washing. It is described that a creamy foam is obtained. However, even with this cleaning material, if the hardness of the water used is high, suppression of the feeling of sticking, ease of foaming and foam quality are not sufficient.

Patent Document 3 describes a detergent composition in which N-decanoyl-N-hydroxyethyl-β-alanine triethanolamine salt is combined with lauric acid. However, this composition has high water hardness and can suppress the feeling of tension, but the ease of foaming and foam quality are not sufficient.
With the conventional personal cleansing compositions described in these patent documents, it was difficult to satisfy all of the good ease of foaming and foam quality, and the suppression of the firming feeling after washing even when using hard water.

JP-A-8-3030 JP 2009-242274 A Japanese Patent Laid-Open No. 11-12240

An object of the present invention is to provide a personal cleansing composition capable of obtaining good lathering ability and lather quality even when using hard water, and capable of suppressing or eliminating the feeling of firmness after washing.
In the present invention, “good foamability can be obtained” can be reworded as being excellent in fast foamability, and “good foam quality can be obtained” means, for example, fine and dense foam can be obtained. Say

  As a result of intensive studies to solve the above problems, the present inventors have found that a body cleanser composition containing two specific anionic surfactants and a specific fatty acid salt in a specific ratio is as described above. I found that I could achieve my objective.

（式（１）中、Ｒ^１ＣＯは炭素数８〜２２の脂肪族アシル基を示し、Ｒ^２は単結合または炭素数１〜４の直鎖もしくは分岐鎖のアルキレン基を示し、Ｒ^３は炭素数１〜４の直鎖または分岐鎖のアルキレン基を示し、Ｍ^１はアルカリ金属原子、アルカノールアミンを示す。）

（式（２）中、Ｒ^４ＣＯは炭素数８〜２２の脂肪族アシル基を示し、ｎは１〜２の整数を示し、Ｍ^２はアルカリ金属原子、アルカノールアミンを示す。） That is, the present invention includes (a) component: 0.1 to 20% by mass of the surfactant represented by the formula (1), and (b) component: 10 to 50% by mass of the fatty acid salt having 8 to 22 carbon atoms. (C) component: 0.1-40 mass% of surfactant represented by Formula (2) is contained, and mass ratio ((a) / (b)) of (a) component and (b) component is A body cleanser composition having a mass ratio of (a) component to (c) component ((a) / (c)) of 0.05 to 1 is there.

In formula (1), R ¹ CO represents a C 8-22 aliphatic acyl group, R ² represents a single bond or a C 1-4 linear or branched alkylene group, and R ³ represents represents a linear or branched chain alkylene group having 1 to 4 carbon atoms, M ¹ is shown an alkali metal atom, an alkanolamine.)

(In formula (2), R ⁴ CO represents an aliphatic acyl group having 8 to 22 carbon atoms, n represents an integer of 1 to ² , and M ² represents an alkali metal atom or an alkanolamine.)

According to the body cleansing composition of the present invention, good lathering ability and lather quality can be obtained even when using hard water, and the feeling of washing after washing can be suppressed or eliminated.
In the present specification, “hard water” refers to water having an American hardness of 120 ppm or more.

Hereinafter, embodiments of the present invention will be described.
The body cleaning composition of the present invention contains at least the following components (a), (b) and (c).

[(A) component]
The component (a) used in the present invention is a surfactant represented by the formula (1).
R ¹ CO in the formula (1) is an aliphatic acyl group having 8 to 22 carbon atoms, preferably 8 to 18 carbon atoms. The aliphatic acyl group includes not only an acyl group derived from a saturated or unsaturated fatty acid having 8 to 22 carbon atoms, but also an acyl group derived from a mixed fatty acid containing two or more of these fatty acids. Examples thereof include coconut oil fatty acid acyl group, palm kernel oil fatty acid acyl group, caproyl group, lauroyl group, myristoyl group, palmitoyl group, stearoyl group, oleoyl group, and behenyl group. Preferred are lauroyl group, myristoyl group, coconut oil fatty acid acyl group, palm kernel oil fatty acid acyl group. Particularly preferred are lauroyl group, coconut oil fatty acid acyl group and palm kernel oil fatty acid acyl group.

R < ² > in Formula (1) shows a single bond or a C1-C4 linear or branched alkylene group. Examples of R ² include a methylene group, an ethylene group, an n-propylene group, an isopropylene group, an n-butylene group, and an isobutylene group, and an ethylene group and an n-propylene group are preferable. That is, as R ² OH in the formula (1), for example, monohydroxyethyl group, monohydroxypropyl group, monohydroxyisopropyl group, monohydroxybutyl group, 2-hydroxybutyl group and the like can be mentioned. A monohydroxyethyl group and a monohydroxypropyl group are preferred.

Further, R ³ in the formula (1) represents a straight-chain or branched-chain alkylene group having 1 to 4 carbon atoms. Examples of R ³ include a methylene group, an ethylene group, an n-propylene group, an isopropylene group, an n-butylene group, and an isobutylene group, and an ethylene group and an n-propylene group are preferable. That is, examples of R ³ COOH in formula (1) include a monocarboxymethylene group, a monocarboxyethylene group, a monocarboxypropylene group, a monocarboxyisopropylene group, a monocarboxybutylene group, and a monocarboxyisobutylene group. A monocarboxyethylene group is preferred.

M ¹ in the formula (1) represents an alkali metal atom, an alkanolamine. Examples of the alkali metal atom include sodium and potassium. Examples of the alkanolamine include monoethanolamine, diethanolamine, and triethanolamine. Among these, sodium, potassium and triethanolamine are preferred.

  Specific examples of the surfactant represented by the formula (1) include lauroyl hydroxyethylalanine sodium, lauroyl hydroxyethylalanine triethanolamine, lauroyl hydroxypropylalanine triethanolamine, cocoyl hydroxyethylalanine sodium, and the like. .

  In the present invention, component (a) can be used by appropriately selecting one or two or more of the compounds encompassed by the above formula (1).

[Component (b)]
The component (b) used in the present invention is a fatty acid salt having 8 to 22 carbon atoms.
10-20 are preferable and, as for carbon number of a fatty acid, 12-18 are especially preferable. Moreover, as the fatty acid having 8 to 22 carbon atoms, for example, lauric acid, myristic acid, palmitic acid, isopalmitic acid, stearic acid, isostearic acid, oleic acid and the like can be mentioned, and one or more of them can be mentioned Can be used. In addition, mixed fatty acids that are mixtures of fatty acids can be used, and examples of such mixed fatty acids include coconut oil fatty acid, palm kernel oil fatty acid, and tallow fatty acid. Preferred are lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, coconut oil fatty acid and palm kernel oil fatty acid, and particularly preferred are lauric acid, myristic acid, palmitic acid and stearic acid.

Moreover, as a counter ion which forms a salt, Alkali metal atoms, such as sodium and potassium, Organic amines, such as monoethanolamine, a diethanolamine, and a triethanolamine, are mentioned. Preferred are sodium, potassium and triethanolamine, and particularly preferred is potassium.
In the present invention, as the component (b), one or two or more of the above-mentioned fatty acid salts can be appropriately selected and used.

[Component (c)]
The component (c) used in the present invention is a surfactant represented by the formula (2) and is an acylmethyl taurine salt.
R ⁴ CO in the formula (2) represents an aliphatic acyl group having 8 to 22 carbon atoms, preferably 8 to 18 carbon atoms. The aliphatic acyl group includes not only an acyl group derived from a saturated or unsaturated fatty acid having 8 to 22 carbon atoms, but also an acyl group derived from a mixed fatty acid containing two or more of these fatty acids. Examples thereof include coconut oil fatty acid acyl group, palm kernel oil fatty acid acyl group, caproyl group, lauroyl group, myristoyl group, palmitoyl group, stearoyl group, oleoyl group, and behenyl group. Preferred are lauroyl group, myristoyl group, coconut oil fatty acid acyl group, palm kernel oil fatty acid acyl group. Particularly preferred are lauroyl group, coconut oil fatty acid acyl group and palm kernel oil fatty acid acyl group.

N in Formula (2) shows the integer of 1-2.
M ² represents an alkali metal atom or an alkanolamine. Examples of the alkali metal atom include sodium and potassium. Examples of the alkanolamine include monoethanolamine, diethanolamine, and triethanolamine. Among these, sodium, potassium and triethanolamine are preferred.

  Specific examples of the acyl methyl taurine salt represented by the formula (2) include, for example, lauroyl methyl taurine sodium, lauroyl methyl taurine potassium, myristoyl methyl taurine sodium, myristoyl methyl taurine potassium, coconut oil fatty acid methyl taurine sodium, coconut oil fatty acid Examples include methyl taurine taurine sodium, coconut oil fatty acid methyl taurine potassium and the like.

  In the present invention, as the component (c), one or two or more of the compounds encompassed by the above formula (2) can be appropriately selected and used.

Next, the content of each component in the body cleaning composition of the present invention will be described.
(A) Content of a component is 0.1-20 mass% with respect to a body cleaning composition, Preferably it is 0.5-15 mass%, Most preferably, it is 1-10 mass%. . When the content of the component (a) is too small or too large, the foaminess at the time of washing may deteriorate.

  The content of the component (b) is 10 to 50% by mass, preferably 20 to 40% by mass, and particularly preferably 25 to 35% by mass, based on the body cleanser composition. When the content of the component (b) is too small, the ease of foaming and the fine texture of the foam may be reduced. When the content of the component (b) is too large, a solid precipitates to prepare the desired dosage form. May become difficult, or problems such as the precipitation of the surfactant at low temperatures and a decrease in stability may occur.

  The content of the component (c) is 0.1 to 40% by mass, preferably 0.5 to 30% by mass, and particularly preferably 1 to 20% by mass, based on the body cleanser composition. . When the content of the component (c) is too small, the ease of foaming at the time of washing may not be sufficient, and when the content of the component (c) is too large, the surfactant precipitates and is stable at low temperatures. Problems such as decreased performance may occur.

  The weight ratio of the component (a) to the component (b) ((a) / (b)) is 0.01 to 0.8, preferably 0.1 to 0. 4 If the mass ratio ((a) / (b)) is too large, the skin may be too moist to wash up and the foamability may not be sufficient. When the mass ratio ((a) / (b)) is too small, suppression of the feeling of tightness of the washed-out skin may be insufficient.

  Moreover, mass ratio ((a) / (c)) of the component (a) and the component (c) is 0.05 to 1, preferably 0.15 to 0.6. If the mass ratio ((a) / (c)) is too large, the texture, density and ease of foaming of the foam may not be sufficient. If the mass ratio ((a) / (c)) is too small, the size of the foam may not be sufficient.

The body cleanser composition of the present invention can be manufactured according to a conventional method. The personal cleansing composition of the present invention may further contain a solvent. Examples of the solvent include water, lower alcohols such as ethanol, and lower alcohol aqueous solutions, and water is particularly preferable.
In the body cleaning composition of the present invention, the total content of the components (a) to (c) and a solvent such as water is 100% by mass or less.

As long as the body cleaning composition of the present invention is intended for body cleaning, the use form such as liquid or gel is not limited. For example, the body cleaning composition can be used as a body shampoo, facial cleanser, and hand soap. .
In addition, the body cleanser composition of the present invention may, if necessary, contain other surfactants or moisturizers, oils, water soluble polymers, preservatives, bactericides, as long as the effects of the present invention are not impaired. The composition may contain various components generally used for hair and body cleansers such as pH adjusters.

Examples of other surfactants include cationic surfactants, anionic surfactants (excluding the components (a) and (c)), amphoteric surfactants, and nonionic surfactants. Among them, it is preferable to contain an amphoteric surfactant or a nonionic surfactant.
Examples of amphoteric surfactants include sodium cocoamphoacetate, lauramidopropyl betaine, cocamidopropyl betaine, sodium lauraminodiacetate and the like, and non-ionic surfactants include, for example, sorbitan laurate, sorbitan palmitate, Sorbitan fatty acid esters such as sorbitan oleate, sorbitan stearate, sorbitan polyoxyethylene laurate, sorbitan polyoxyethylene palmitate, sorbitan polyoxyethylene oleate, sorbitan polyoxyethylene stearate; glycerin fatty acid ester; polyglycerin lauric acid Esters; polyglycerin lauryl ether; sucrose fatty acid esters such as sucrose laurate ester, sucrose stearate ester; laureth-4 What polyoxyalkylene alkyl ethers; polyoxyalkylene esters such as laurate PEG-4 and PEG-7 glyceryl cocoate; Furthermore, like alkylol amides such as coconut oil fatty acid diethanolamide.

As the humectant, for example, glycerin, propylene glycol, 1,3-butylene glycol, diglycerin, sorbitol and the like can be mentioned.
Examples of the oil component include hydrocarbon oils such as liquid paraffin, solid paraffin and petrolatum; ester oils such as isopropyl myristate, octyldodecyl myristate, isopropyl palmitate and diisopropyl sebacate; straight silicone oils such as dimethylpolysiloxane and poly Examples thereof include silicone oils such as modified silicone oils into which an ether group, an amino group, a fatty acid amide group and the like have been introduced.
Examples of water-soluble polymers include nonionic polymers such as starch, methyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, guar gum and xanthan gum; anionic polymers such as carboxymethyl starch, carboxymethyl cellulose, alginic acid and gum arabic; Cationic starch; dimethyldiallylammonium chloride acrylamide copolymer (polyquaternium-7), cationized cellulose (polyquaternium-10), dimethyldiallylammonium chloride acrylic acid copolymer (polyquaternium-22), acrylamide acrylic acid chloride And cationic polymers such as dimethyldiallylammonium copolymer (polyquaternium-39).

Examples of the preservative and fungicide include benzoic acid or a salt thereof, parabens such as paraoxybenzoic acid, methyl paraoxybenzoate, and propyl paraoxybenzoate, and phenoxyethanol.
Examples of pH adjusters include organic acids such as citric acid and sodium citrate and salts thereof, potassium hydroxide, sodium hydroxide, triethanolamine and the like.

[Examples 1 to 11 and Comparative Examples 1 to 8]
Hereinafter, the present invention will be specifically described by way of examples and comparative examples.
Based on the formulations described in Table 1 and Table 2, a personal cleansing composition was prepared according to a conventional method.
The body cleansing compositions obtained in Examples and Comparative Examples were evaluated as follows, and the results are summarized in Tables 1 and 2.

(1) Quick foaming (ease of foaming when washed with hard water)
Twenty men and women (24 to 47 years old) were used as panelists, and the speed of bubbling when a sample 5 g of the sample was hand-flushed with water having a hardness of 150 and 40 ° C. was evaluated. A total score of 20 people was obtained based on 2 points where the bubbling was felt fast, 1 point if the bubbling was felt fast, and 0 if the bubbling was felt slow, as below.
A: Total score of 35 or more; foaming is very fast.
A: The total score is 30 or more and less than 35; foaming is fast.
Δ: Total score of 20 points or more and less than 30 points; foaming is slow.
X: The total score is less than 20; foaming is very slow.

(2) Foam density 200 g of a body detergent composition aqueous solution (diluted with water of 1% by mass and hardness 150) at 40 ° C. is placed in a bowl, and it is rotated at 800 rpm with a hand mixer (DK 5031 manufactured by Shell Mark Co., Ltd.) Bubbled for 1 minute. Transfer the contents of the bowl to a 500 mL measuring cylinder, place a weight (5 g) attached float (Fluorescent Synthetic Ball 15, weight 10 g) on the foam until the center line of the float sinks a scale equivalent to 100 mL Time was measured and the bubble density was evaluated according to the following criteria.
A: Passing time 15 seconds or more; foam density is very high.
○: Passing time 10 seconds or more and less than 15 seconds; foam density is high.
Δ: Passing time 5 seconds or more and less than 10 seconds; foam density is low.
X: Passing time 0 seconds or more and less than 4 seconds; the bubble density is very low.

(3) Suppression of a feeling of tension After making 20 g of men and women (24 to 47 years old) a panelist, attach 5 g of a sample, wash the hand with water with a hardness of 150 and 40 ° C, wipe the moisture with a towel Based on the number of panelists evaluated as having no skin tightness, the following criteria were used.
A: 18 to 20 people; little or no feeling of tension.
○: 11 to 17 people;
Δ: 7 to 10 people;
X: 0 to 6 people;

Examples 1 to 11 were good evaluations in all items.
On the other hand, since the comparative example 1 does not contain the component (a), the foam density is insufficient, and the fast foaming property and the suppression of the feeling of stickiness are inferior.
Since Comparative Example 2 did not contain the component (c), the quick foam property was insufficient and the foam density was inferior.
Since the comparative example 3 did not contain the component (b), the quick foam property was insufficient and the foam density was inferior.
Comparative Example 4 did not contain the component (a), and instead contained an acylmethylalanine salt, but all of the fast foam, foam density, and suppression of feeling in tension were insufficient.
Comparative Example 5 contains the component (a) and lauryl dimethyl acetate betaine, lauric acid and sucrose fatty acid ester as other components, and although fastness can be suppressed, fast foamability is insufficient, Foam density was poor.

Comparative Example 6 does not contain the component (a), and mica is included as another component in order to increase the dry feeling to the skin, but since hard water is used, the suppression of the feeling of tension is inferior. The Moreover, quick-foam property was inadequate and the foam density was inferior.
In Comparative Example 7, since the mass ratio of the (a) component to the (c) component ((a) / (c)) exceeds the upper limit defined in the present invention, although the feeling of firmness is suppressed, the fast foam is obtained. And the foam density was insufficient.
In Comparative Example 8, since the mass ratio ((a) / (b)) of the component (a) to the component (b) exceeds the upper limit defined in the present invention, although the feeling of firmness is suppressed, fast foamability is obtained. And the foam density was insufficient.

  Further, formulation examples of the body cleanser composition of the present invention are specifically shown below.

  The body cleanser compositions of these formulation examples provided good foaming ease and foam quality even when using hard water, and were excellent in suppressing or eliminating the feeling of skin tightness after washing.

  The body cleansing composition of the present invention is suitable for use in body washing, particularly in body washing using hard water, and can be easily foamed and foamed even when using hard water, so It is possible to suppress or eliminate the feeling of being in a tight state.

Claims (1)

Component (a): 0.1 to 20% by mass of the surfactant represented by the formula (1)
(B) Component: 10 to 50% by mass of a fatty acid salt having 8 to 22 carbon atoms,
(C) component: 0.1-40 mass% of surfactant represented by Formula (2) is contained,
The mass ratio ((a) / (b)) of the component (a) and the component (b) is 0.01 to 0.8,
A body cleaning composition, wherein the mass ratio of component (a) to component (c) ((a) / (c)) is 0.05 to 1.

In formula (1), R ¹ CO represents a C 8-22 aliphatic acyl group, R ² represents a single bond or a C 1-4 linear or branched alkylene group, and R ³ represents represents a linear or branched chain alkylene group having 1 to 4 carbon atoms, M ¹ is shown an alkali metal atom, an alkanolamine.)

(In formula (2), R ⁴ CO represents an aliphatic acyl group having 8 to 22 carbon atoms, n represents an integer of 1 to ² , and M ² represents an alkali metal atom or an alkanolamine.)