JP2007269704A - Detergent composition for skin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detergent composition for skin excellent in foaming power in use, fineness of foam, and keeping soft and flexible foam and excellent in moist feeling of the skin after use. <P>SOLUTION: The detergent composition for skin is obtained by formulating (a) a higher fatty acid salt, (b) a dialkyl diallyl quaternary ammonium salt-acrylamide copolymer and (c) an oil agent having a diglycerine skeleton. The invention relates to the detergent composition for skin further formulated with (d) a salt of 8-16C alkyloylmethyltaurine. The composition is characterized by containing 0.1-1.0 mass% of the component (b) and 0.5-4.0 mass% of the component (c) in the total composition. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a skin cleanser composition comprising a higher fatty acid salt, a copolymer of a dialkyldiallyl quaternary ammonium salt and acrylamide, and an oil agent having a diglycerin skeleton, and more specifically, in use. The present invention relates to a skin cleanser composition that is excellent in foaming power and fine texture of foam, can maintain a soft and elastic foam, and has a moist feeling on the back skin.

  In recent years, in addition to the cleansing action, which is the original function, demands on the quality of use such as high foaming properties and a feeling of washed-out skin have been increasing for skin cleansing compositions. Therefore, conventionally, skin feel has been adjusted by blending various surfactants, which are cleaning bases, with water-soluble polymers and oils.

Among these, taking water-soluble polymer as an example, the surfactant of a higher fatty acid salt and the like is used in combination with the water-soluble polymer, and the durability of the foam is designed by increasing the viscosity of the liquid film between the bubbles. There are many examples. However, the foam persistence can be increased by simply blending a water-soluble polymer, but there is a problem that the foaming power is weakened due to the viscosity or the back skin is nullified.

Further, the skin cleanser composition can remove dirt such as sebum and sweat by removing the oil necessary for the skin at the same time by using a surfactant as a main component. Therefore, there is an example in which an oil agent is blended to moisten the back skin. However, when an oil agent is blended, the moist feeling of the back skin can be obtained, but there is a problem that foaming becomes worse.

To solve these problems, cationic water-soluble polymers such as cationized cellulose and polydimethyldiallylammonium chloride, and amphoteric water-soluble polymers such as acrylic acid, dimethyldiallylammonium chloride and acrylamide copolymers are blended. In addition, a technique for obtaining good foaming properties (for example, see Patent Documents 1 and 2), a nonionic surfactant such as polyethyleneethyleneglycerin fatty acid ester, and an oil such as triglyceride can be used to provide a feeling of firmness in the back skin. Techniques for mitigation (see, for example, Patent Documents 3 and 4) have been developed.
JP 2001-64678 A JP-A-5-156299 JP 2001-213761 A Japanese Patent No. 3250341

  However, in the skin cleanser composition described in Patent Document 1 containing a cationic or amphoteric water-soluble polymer, foaming properties are excellent, but foam fineness and elastic foam can be maintained. The foam quality and durability, and the moist feeling of the back skin were not satisfactory. In addition, in the skin cleanser composition described in Patent Document 2 in which a cationic water-soluble polymer is blended, although foamability and foam sustainability are excellent, foam quality such as fine texture of foam and elasticity of foam, and The moist feeling of the back skin was not fully satisfactory.

  Moreover, in the skin cleanser composition of patent document 3 which mix | blended nonionic surfactant and oil agents, such as a polyoxyethylene glyceryl fatty acid ester, although the moist feeling of a back skin is excellent, foamability, the fineness of foam The elasticity of the pods and the sustainability of the bubbles were not fully satisfactory. In the skin cleanser composition described in Patent Document 4 containing a cationic water-soluble polymer and an oil such as triglyceride, the foaming property and the moist feeling of the back skin are excellent, but the fineness of foam and the elasticity of foam The foam persistence was not fully satisfactory.

  Therefore, the development of a skin cleanser composition that is excellent in foaming power and fineness of the foam during use, can maintain a soft and elastic foam, and has a moist feeling on the back skin is also eagerly desired. It had been.

  In view of the above situation, as a result of intensive studies, the present inventors have blended a skin cleanser composition with a higher fatty acid salt, a copolymer of a dialkyldiallyl quaternary ammonium salt and acrylamide, and an oil agent having a diglycerin skeleton. It has been found that the above problems can be solved.

That is, the present invention includes the following components (a) to (c):
(A) Higher fatty acid salt (b) Copolymer of dialkyl diallyl quaternary ammonium salt and acrylamide (c) A skin cleansing composition comprising an oil agent having a diglycerin skeleton is provided. .

  Furthermore, the present invention provides a skin cleansing composition characterized in that the component (d) has an alkyloyl group having 8 to 16 carbon atoms and an alkyl group is a methyl group. is there.

  Furthermore, the amount of component (b) in the total composition is 0.1 to 1.0% by mass, and the amount of component (c) is 0.5 to 4.0% by mass. A cleaning composition is provided.

  The skin cleanser composition of the present invention has excellent foaming power when used, fine texture of the foam, can maintain a soft and elastic foam, and also has a moist feeling on the back skin It is.

  The higher fatty acid salt of component (a) to be blended in the skin cleanser composition of the present invention is contained for the purpose of forming bubbles at the time of use and improving foamability and cleanability. Even in the case of a hydrated fatty acid salt, the fatty acid salt may be formed by neutralizing the fatty acid and the base in the production process. Although it does not specifically limit as a higher fatty acid salt used for such a component (a), For example, a C8-C18 fatty acid base salt, a saturated, unsaturated, linear or branched fatty acid salt is mentioned. it can. Examples of fatty acids include single fatty acids such as lauric acid, myristic acid, palmitic acid, isostearic acid and oleic acid, and mixed fatty acids such as coconut oil fatty acid and beef tallow fatty acid. Examples of the base include inorganic bases such as sodium hydroxide and potassium hydroxide, ammonium salts, monoethanolamine salts, diethanolamine salts, triethanolamine salts, 2-amino-2-methylpropanol, and 2-amino-2-methylpropane. Examples include alkanolamines such as diols, and basic amino acids such as lysine and arginine. Among them, inorganic bases and triethanolamine salts are preferable, and potassium hydroxide is particularly preferable from the viewpoint of foamability and the like. These may be blended in advance as neutralized products, or may be blended separately and neutralized. In the case where a partially unneutralized fatty acid is present, the neutralization rate is preferably 50 to 95% because an increase in pH is suppressed and this is preferable from the viewpoint of suppressing skin irritation.

The amount of the higher fatty acid salt used in the present invention is not particularly limited, but is 5 to 50% by mass (hereinafter simply referred to as “%”), and may be used alone or in combination of two or more.
Within this range, it is possible to obtain a skin cleanser composition that has a sufficient foaming power during use and does not feel a feeling of tightness after washing.

  The copolymer of dialkyl diallyl quaternary ammonium salt of component (b) and acrylamide to be blended in the skin cleansing composition of the present invention is a cationic polymer and maintains elastic foam, It is formulated for the purpose of imparting a moist feeling, and has the following general formula (1)

(Wherein R ¹ and R ² are hydrogen atoms, alkyl groups having 1 to 3 carbon atoms or phenyl groups, R ³ and R ⁴ are alkyl groups having 1 to 18 carbon atoms or hydrogen atoms, and X ⁻ is an anion. S and t are 0 or 1, and s + t = 1, m and l are m ≧ 1 and l ≧ 1, and m + 1 is a number that makes the molecular weight of the compound 10,000 to 1,500,000. Is represented). Specific examples include dimethyldiallylammonium chloride / acrylamide copolymer. These are commercially available as Marquat 550 (Calgon), Lipoflow MN (Lion).

The copolymer of the dialkyl diallyl quaternary ammonium salt of component (b) and acrylamide used in the present invention can be used alone or in combination of two or more as required. The blending amount is preferably 0.1 to 1.0%, more preferably 0.15 to 0% in the total amount of the skin cleanser composition in order to maintain elastic foam and give a moist feeling to the back skin. 0.6%.

The oil agent having a diglycerin skeleton of component (c) to be blended in the skin cleansing composition of the present invention is blended for the purpose of imparting fine texture of foam during use and a moist feeling on the back skin. It is an esterified product of glycerin and a fatty acid, and the fatty acid portion may be a saturated, unsaturated, linear or branched fatty acid having 8 to 20 carbon atoms, and isostearic acid is particularly preferred from the viewpoint of odor and skin irritation. Moreover, it is preferable that it is the range of 1-50000 mPa * s at 25 degreeC as a viscosity value of a component (c).

Examples of commercially available oil agents having a diglycerin skeleton of component (c) used in the present invention include Cosmol 41, Cosmol 42, Cosmol 43 (all manufactured by Nisshin Oilio Co., Ltd.), Nikkor DGMO, DGDO, DGMIS (all manufactured by Nikko Chemicals Co., Ltd.) and the like may be mentioned, and two or more kinds may be used in combination.

The blending amount of the oil agent having a diglycerin skeleton of the component (c) used in the present invention is preferably 0.5 to 4.0%, more preferably, in order to give fine texture of foam and moist feeling of the back skin. 0.8-3.0%.

In the present invention, in addition to the above essential components, it is desirable that the component (d) has an alkyloyl group having 8 to 16 carbon atoms, and an alkyloylmethyltaurine salt is added. Specifically, a skin cleanser composition having better foamability and fine texture of the foam can be obtained by blending an alkyloylmethyl taurine salt represented by the following formula (3).

Examples of the alkyloylmethyltaurine salt having 8 to 16 carbon atoms of the alkyloyl group of the component (d) used in the present invention include lauroylmethyltaurine sodium, myristoylmethyltaurine sodium, coconut oil fatty acid methyltaurine sodium, and the like. Examples of commercially available products include Nikkor MMT (manufactured by Nikko Chemicals Co., Ltd.) and Neoscope CN-30 (manufactured by Toho Chemical Industry Co., Ltd.), and may be used alone or in combination of two or more.

In addition to the above-mentioned components, the skin cleansing composition of the present invention is a polyhydric alcohol, polysaccharide, protein derivative, drug, inorganic acid or salt thereof, organic acid or organic acid as long as the effects of the present invention are not impaired depending on the purpose. Components such as salts, antioxidants, ultraviolet absorbers, dyes, inorganic pigments, and fragrances may be added.

Here, examples of the polyhydric alcohol include 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, dipropylene glycol, glycerin, diglycerin, sorbitan, sorbitol, maltitol, glucose, sucrose, and the like. Can be mentioned.

Examples of the polysaccharide include hyaluronic acid, chondroitin sulfate and salts thereof, carrageenan, locust bean gum and the like.

As the drug, drugs commonly used in cosmetics such as vitamin Cs, vitamin Es, amino acids, herbal medicines, anti-inflammatory agents, and bactericides can be blended.

Examples of inorganic acids or salts thereof include hydrochloric acid, sulfuric acid, sodium chloride, potassium chloride and the like.

Examples of the organic acid or salts thereof include citric acid, lactic acid, malic acid, trisodium citrate, sodium lactate and the like.

Examples of inorganic pigments include mica, talc, kaolin, and titanium oxide.

  The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples. Further, the skin cleansing composition of the present invention may be in the form of emulsion, cream or solid, and can be applied to facial cleansers, shampoos, body cleansing agents and the like.

Invention products 1 to 6 and comparative products 1 to 6: face washing creams Face washing creams having the compositions shown in Tables 1 to 3 were prepared by the following production method, (1) foaming power, (2) fineness of foam, For each item of (3) foam elasticity, (4) persistence of foam, and (5) moist feeling of the back skin, the results are shown in Table 1 to Table 1 together with the results of evaluation and judgment according to the following evaluation methods and criteria. It was shown in 3.

(Production method)
A. Components (1) to (8), (17) and (18) are heated and dissolved at 75 ° C. and stirred uniformly.
B. Components (9) to (16) are added, mixed, and then uniformly dispersed.
C. B was cooled and then filled to obtain a face-wash cream.

(Evaluation method 1) Foaming force The foaming force was evaluated by the following evaluation criteria. Each foam panel was foamed by 20 specialist panels while dissolving 1.5 g of each sample with 12 g of purified water at 30 ° C. Each stage was evaluated and scored, and the average value was calculated from the scores of all the panel members for each sample, and judged in 4 stages according to the following criteria.
(Evaluation criteria)
(Score): (Evaluation)
6: very good 5: good 4: slightly good 3: normal 2: slightly bad 1: bad 0: very bad (judgment criteria)
(Average score): (Judgment)
5.0 or more: ◎ (very good)
3.5 or more and less than 5.0: ○ (good)
1.5 or more and less than 3.5: △ (Normal)
Less than 1.5: × (defect)

As a method of use used in the following evaluations (2), (3) and (4), 10 g of a sample is placed in a cylindrical glass bottle having a radius of 2.5 cm and a height of 10 cm, 20 g of water at 20 ° C. is added and dissolved 50 times. Evaluation was carried out using foam produced by shaking.

(Evaluation Method 2) Fineness of foam A black hiding power test paper is inserted into each foamed sample, and the fineness of the attached foam is visually evaluated by 20 specialist panels. The score was given in 7 stages, and the average value was calculated from the scores of all the members for each sample, and judged in 4 stages according to the following criteria.
(Evaluation criteria)
(Score): (Evaluation)
6: very good 5: good 4: slightly good 3: normal 2: slightly bad 1: bad 0: very bad (judgment criteria)
(Average score): (Judgment)
5.0 or more: ◎ (very good)
3.5 or more and less than 5.0: ○ (good)
1.5 or more and less than 3.5: △ (Normal)
Less than 1.5: × (defect)

(Evaluation Method 3) Feeling of elasticity of bubbles Since the higher the resistance value when taking out the plate from each of the foamed samples, the stronger the tension, the tension value is used as an index of the elasticity of the foam. I was able to think. Therefore, each of the foamed samples was subjected to dynamic contact angle measurement three times using a glass plate (manufactured by MATUNAMI; W = 18.0 mm, t = 0.15 mm) with a surface tension tester DCA-100 (manufactured by ORIENTEC). The average value of the measured reverse tension values was calculated and judged in four stages according to the following criteria.
(Criteria)
(Average of measured values): (Judgment)
55 dyn / cm or more: ◎ (very good)
45 dyn / cm or more and less than 55 dyn / cm: ○ (good)
35 dyn / cm or more and less than 45 dyn / cm: Δ (normal)
Less than 35 dyn / cm: x (defect)

(Evaluation Method 4) Sustainability of foam A black hiding power test paper is inserted into each foamed sample, and 20 specialist panels visually evaluate the remaining condition after 2 minutes for the adhered foam. Judgment was made.
(Evaluation criteria)
(Judgment): (Evaluation)
A: Out of 20 professional panelists, 16 or more recognized that there was almost no reduction in bubbles.
○: Of the 20 professional panelists, 10 to 15 recognized that the bubbles were not reduced.
Δ: Out of 20 professional panelists, 5 to 9 recognized that the bubbles were not substantially reduced.
X: Out of 20 professional panelists, 4 or less recognized that bubbles were not substantially reduced.

  From FIG. 1 and FIG. 2, the foam of the invention product was fine, and even with the passage of time, the appearance of the foam repelling and becoming large was hardly seen, and the sustainability was good. On the other hand, with the comparative foam, the texture was rough, and over time, the foam was seen to be larger and larger.

(Evaluation Method 5) Using 1.5% of each sample used for evaluation of the moist feeling foaming power of the back skin with 12 g of purified water at 30 ° C., using a full-face test by 20 professional panelists with foaming foam The skin feel immediately after rinsing was determined according to the following criteria.
(Judgment): (Evaluation)
A: Out of 20 professional panelists, 16 or more felt moist and recognized as good.
○: Among the 20 professional panelists, 10 to 15 felt moist and recognized as good.
Δ: Among 20 professional panelists, 5 to 9 felt moist and recognized as good.
X: Out of 20 professional panelists, 4 or less felt moist and recognized as good.

  The facial cleansing creams of the present invention products 1 to 6 have a good foaming power, the resulting foam is fine, has a smooth and elastic feeling, is excellent in sustainability, and is used for the back skin after use. A product with a moist feeling was obtained. On the other hand, Comparative Product 1 in which components (b), (c), and (d) were not blended was inferior in the fineness of the foam, the durability, and the moist feeling of the back skin. Comparative product 2 which does not contain the higher fatty acid salt of component (a) has low foaming power and is not good in the foam quality and the feel of the back skin, and other anionic surfactant is used instead of component (a). Although the comparative product 3 which was mix | blended had high foaming power, it was inferior to the foam quality and the touch of the back skin. In addition, Comparative product 4 not containing component (b), Comparative product 5 containing another cationic polymer instead of component (b), Comparative product 6 containing nonionic polymer, and amphoteric polymer Compared to Comparative Product 8 and Component (c), which does not have a sufficiently satisfactory foam elasticity, durability and moist feeling on the back skin, it is not obtained with Compound 7 In Comparative product 9 containing an oil agent having a monoglycerin skeleton and Comparative product 10 containing a surfactant having a polyglycerin skeleton, satisfactory results were not obtained in terms of foaming power, fineness of foam, etc. .

Body cleanser (ingredient) (%)
1. Palm oil fatty acid acylglycine potassium 9
2. Potassium laurate 7
3. Lauryldimethylaminoacetic acid betaine 5
4). Cocoyl methyl taurine triethanolamine 0.5
5). Palm oil fatty acid diethanolamide 3
6). Copolymer of diallyl quaternary ammonium salt and acrylamide (Note 1) 0.48
7). Diglyceryl diisostearate 1
8). Purified water 5
9. Hydroxypropyl methylcellulose 0.1
10.1,3-butylene glycol 3
11. Preservative appropriate amount 12. Perfume appropriate amount13. Purified water remaining amount (Note 1) Marquat 550 (8%) (Calgon Co., Ltd.) (The amount is listed as the amount of pure polymer component)

(Production method)
A. Components (1) to (5), (11), and (13) are mixed uniformly.
B. Components (8) to (10) are heated and mixed uniformly.
C. After adding B, (6), (7), and (12) to A, they were mixed uniformly to obtain a body cleaning material.

  The cleaning agent for body of Example 2 has a good foaming power, the resulting foam is fine, has a smooth and elastic feeling, has excellent foam quality, and moisturizes the skin after use The feeling was excellent.

Liquid facial cleanser (component) (mass%)
1. N-coconut oil fatty acid acyl glutamic acid triethanolamine 10
2. Palm oil fatty acid amidopropyl betaine 1
3. Palm oil fatty acid triethanolamine 5
4. Cocoyl methyl taurine triethanolamine 0.5
5. Palm oil fatty acid diethanolamide 3
6. Copolymer of diallyl quaternary ammonium salt and acrylamide (Note 1) 0.32
7. Diglyceryl monooleate 0.5
8. Purified water remaining amount 9. Preservative appropriate amount 10.1,3-butylene glycol 3

(Production method)
A. Components (1) to (5) and (8) to (10) are mixed uniformly.
B. After adding (6) and (7) to A, they were mixed uniformly to obtain a liquid facial cleanser.

The liquid facial cleanser of Example 3 has good foaming power, the resulting foam is fine, has a firm and elastic feeling, has excellent foam quality, and has a moist feeling after use. It was excellent.

A state observation photograph after the elapse of 2 minutes as the foam persistence of Invention Product 1. The state observation photograph after 2 minutes as the foam persistence of the comparative product 1.

Claims (3)

The following components (a) to (c):
(A) Higher fatty acid salt (b) Copolymer of dialkyl diallyl quaternary ammonium salt and acrylamide (c) An oil having a diglycerin skeleton is blended.   Furthermore, the skin cleansing composition of Claim 1 which mix | blends the component (d) alkyloyl methyltaurine salt whose carbon number of an alkyloyl group is 8-16.   Furthermore, the compounding amount of the component (b) in the total composition amount is 0.1 to 1.0% by mass, and the compounding amount of the component (c) is 0.5 to 4.0% by mass. Item 3. A skin cleanser composition according to item 1 or 2.