JP4724088B2 - Skin cleanser - Google Patents

Description

  The present invention is a formulation that prevents excessive friction on the skin when washing the face, has a refreshing feel without giving an unpleasant feeling to the skin, and gives a smooth feeling to the skin after washing Regarding cleaning fee.

  Conventionally, higher fatty acid salts are frequently used in skin cleansing agents such as facial cleansers because they have good foaming, good detergency, and a refreshing feeling after washing. However, the detergent mainly composed of a higher fatty acid salt has excellent properties with respect to foaming, detergency, refreshing feeling after washing, etc., but a creamy foam quality cannot be obtained, or during washing There was a disadvantage that the skin feel at the time of washing was not preferred, such as excessive degreasing and soap residue (scum) remaining on the skin.

  As a method for solving the problems of the detergents mainly composed of higher fatty acid salts as described above, conventionally, with the surfactants such as acyl taurine salt type, acyl isethionate type, phosphate ester type, acyl amino acid type, etc. The combined use etc. are examined (refer patent document 1).

  Further, as additives other than surfactants, attempts have been made to improve the foam quality by eliminating silicone compounds, specific glycolipids, raffinose, plant seed viscosity, etc. 2-5).

  Furthermore, an attempt has been made to improve the above problems by combining an acylglycine surfactant and a specific polymer compound without using a higher fatty acid potassium salt as a main component (see Patent Document 6). However, these methods have a problem that slimming occurs at the time of cleaning and the demands of consumers cannot be satisfied.

  As a next problem, cream-type detergents composed mainly of higher fatty acid salts may cause excessive friction on the skin surface, resulting in excessive friction on the skin unless they have sufficient foaming when washing the face. It is known to put a burden. A cream-like cleaning material (see Patent Document 7) characterized by containing a water-disintegrating porous powder has been tried to solve such problems, but has not yet reached an essential solution.

In recent years, it has been demanded that the skin feels smooth when washed. For this reason, examinations, such as combining a specific fatty acid soap, an amphoteric surfactant or an alkanolamide-type nonionic surfactant, and a plant extract in a specific ratio, have been made (see Patent Document 8). However, a sufficient smooth feeling that satisfies the needs of consumers cannot be given, and further improvement has been desired.
JP-A-6-248298 JP-A-10-77206 JP 2001-72574 A JP 2000-178172 A Japanese Patent Laid-Open No. 11-209799 JP-A-9-78082 JP 2003-63947 A Japanese Patent Laid-Open No. 2000-27396

  Accordingly, an object of the present invention is a dosage form that prevents excessive friction to the skin when washing the face, has a refreshing feel without giving an unpleasant feeling to the skin, and slicks the skin when washed up. The object is to provide a skin cleansing agent that imparts a feeling.

  Thus, as a result of intensive studies by the present inventor, the present inventors have found that a skin cleansing material having the following constitution can solve these problems and completed the present invention.

（但し、Ｒ_１は炭素数１０〜３０のアルキル基であり、Ｒ_２は水素、メチル基、−ＣＯＯＨ基から選ばれる基であり、ｎは１〜５０の整数である）で表されるモノマーと、アクリル酸及び／又はメタクリル酸とを構成成分に有する増粘性高分子化合物と、
（Ｂ）アシルアミノ酸型界面活性剤１．０〜３０質量％と、
（Ｃ）アルキルアミノジカルボン酸型界面活性剤とを含有することを特徴とする皮膚洗浄料である。 That is, the present invention provides (A) the following general formula (1)

(Wherein R ₁ is an alkyl group having 10 to 30 carbon atoms, R ₂ is a group selected from hydrogen, methyl group, and —COOH group, and n is an integer of 1 to 50). And a thickening polymer compound having acrylic acid and / or methacrylic acid as constituent components,
(B) 1.0-30% by mass of an acylamino acid type surfactant,
(C) A skin cleanser characterized by containing an alkylaminodicarboxylic acid type surfactant.

  The skin cleansing agent of the present invention is a dosage form that prevents excessive friction on the skin when washing the face, has a refreshing feel without giving the skin an unpleasant feeling of slipping, and is smooth on the skin after washing. It is possible to give a feeling.

  Hereinafter, the configuration of the present invention will be described in detail.

（但し、Ｒ_１は炭素数１０〜３０のアルキル基であり、Ｒ_２は水素、メチル基、−ＣＯＯＨ基から選ばれる基であり、ｎは１〜５０の整数である。）で表されるモノマーと、アクリル酸及び／又はメタクリル酸とを構成成分に有する共重合体である。 The thickening polymer compound (A) used in the present invention has the following general formula (1):

(However, R ₁ is an alkyl group having 10 to 30 carbon atoms, R ₂ is a group selected from hydrogen, methyl group, and —COOH group, and n is an integer of 1 to 50). It is a copolymer having a monomer and acrylic acid and / or methacrylic acid as constituent components.

As such a copolymer, specifically, ACRYLATES / BEHENETH-25
METHACRYLATE COPOLYMER (trade name: Acrine 28, manufactured by Rohm & Haas), ACRYLATES / CETETH-20 (ITACONATE COPOLYMER (trade name: Structure 3001, manufactured by National Starch Corp.), ACRYLATES / CETETHE L Product name: Shintalen W2000, 3V Sigma Co., Ltd.), ACRYLATES / PALMETH-25 ITACONATE COPOLYMER (Product name: Polygel W40, 3V Sigma Co., Ltd.), ACRYLATES / STEARTHTH-50 ACRYLATE COPOLYMER (Product name: Antille 208, Go Rudschmitt), ACRYLATES / STERETTH-20 ITACONATE COPOLYMER (trade name: Structure 2001, manufactured by National Starch Co., Ltd.), ACRYLATES / STERETTH-20 METHACRYLATE COPOLYMER (trade name: Acrine 22, Rohm & H etc. Is also listed in “International Cosmetic Indicative Dictionary and Handbook (issued by The Cosmetic, Toiletry, and Fragrance Association)”.

Among them, a copolymer having R ₁ in the general formula (1) as an alkyl group having 14 to 18 carbon atoms and n being an integer of 20 to 25 and acrylic acid and / or methacrylic acid as constituent components For example, ACRYLATES / STEARETH-20 METHACRYLATE COPOLYMER (trade name: Aculin 22, manufactured by Rohm & Haas) is particularly preferable in terms of usability.

  In addition, the (A) thickening polymer compound in this invention can be used individually or in mixture of 2 or more types, As the compounding quantity, it is 0.05- 6.0% by mass (hereinafter abbreviated as%) is preferable, and more preferably 0.3 to 4.0%. When the blending amount is less than 0.05%, it is difficult to obtain sufficient gel thickening. When the blending amount exceeds 6.0%, foaming is remarkably inhibited, and a stronger gel may increase the frictional force on the skin. is there.

  The component (B) acylamino acid type surfactant in the present invention is an N-acylamino acid salt having an acyl group having 10 to 22 carbon atoms, such as N-lauroylglutamate sodium, N-lauroylglutamate triethanolamine, N such as sodium N-myristoyl glutamate, triethanolamine N-myristoyl glutamate, sodium N-palmitoyl glutamate, triethanolamine N-palmitoyl glutamate, sodium N-stearoyl glutamate, sodium N-oleoyl glutamate, disodium N-palmitoyl glutamate -Acyl glutamate, sodium N-lauroyl aspartate, triethanolamine N-lauroyl aspartate, sodium N-myristoyl aspartate N-myristoyl aspartate triethanolamine, N-acyl (palm oil fatty acid) N-acyl aspartate such as triethanolamine, N-lauroylglycine sodium, N-lauroylglycine triethanolamine, N-myristoyl N-acylglycine salts such as sodium glycine, N-myristoylglycine triethanolamine, N-acyl (coconut oil fatty acid) glycine potassium, other N-acylmethyltaurine salts, N-acylmethylalanine salts, N-acylsarcosine salts, etc. Among them, N-acyl glutamate and N-acyl glycine salt are preferable. Specific examples include Amisoft LK-11, LS-11, LT-12, CT-12, Amilite GCK-11 (F), GCK-12, GCS-11, and ACT-12 (all manufactured by Ajinomoto Co., Inc.). .

  In the present invention, the component (B) acylamino acid type surfactant can be used alone or in admixture of two or more, and the blending amount thereof is 1.0 to 1.0% with respect to the total amount of the skin cleansing composition. It is 30.0%, preferably 5.0-20.0%. If the blending amount is less than 1.0%, the foamy creaminess tends to be lacking or the slippery feeling after washing tends to be lacking. On the other hand, if the blending amount exceeds 30%, the detergency is too high and a feeling of tension is felt.

（式中、Ｒ_３は炭素数１０〜２２のアルキル基又はアルケニル基、Ｒ_４、Ｒ_５は、同じであっても異なっていてもよく、炭素数１〜３のアルキレン基、Ｍ_１、Ｍ_２は、同じであっても異なっていてもよく、水素、アルカリ金属、アルカリ土類金属、アンモニウム、又は有機アミンを示す） The component (C) alkylaminodicarboxylic acid type surfactant in the present invention is a surfactant represented by the following general formula (2).

(In the formula, R ₃ is an alkyl or alkenyl group having 10 to 22 carbon atoms, R ₄ and R ₅ may be the same or different, and are an alkylene group having 1 to 3 carbon atoms, M ₁ , M ₂ may be the same or different and represents hydrogen, alkali metal, alkaline earth metal, ammonium, or organic amine)

Specifically, in the general formula (2), examples of the alkyl group or alkenyl group of R ₃ include a lauryl group, a myristyl group, a palmityl group, a stearyl group, an oleyl group, a coconut oil alkyl group, and the like. When the carbon number of the alkenyl group is 9 or less, irritation to the skin is strong, and when it is 23 or more, foaming properties and stability over time decrease. Examples of the alkylene group for R ₄ and R ₅ include a methylene group, an ethylene group, and a propylene group. Examples of the counter ions of M ₁ and M ₂ include hydrogen, lithium, sodium, potassium, ½ calcium, ½ magnesium, ammonium, triethanolamine, diethanolamine, and monoethanolamine.

  Examples of such alkylaminodicarboxylic acid type surfactants include sodium laurylaminodiacetate and potassium myristylaminodiacetate, and “Nissan Anon LA” manufactured by NOF Corporation is commercially available.

  In the present invention, the component (C) alkylaminodicarboxylic acid type can be used alone or in admixture of two or more. 20.0% is preferable, and more preferably 0.5 to 10.0%. If it is less than 0.1%, a refreshing feeling cannot be imparted, and if the blending amount exceeds 20.0%, the stability of the cleaning material may be impaired.

  In the present invention, as long as the effects of the invention are not impaired, in addition to the above essential components, amphoteric surfactants, nonionic surfactants, gums, oils, other polymer compounds, higher alcohols, polyhydric compounds Alcohols, propellants, preservatives, chelating agents, antioxidants, humectants, pH adjusters, pigments, fragrances and the like can also be blended.

  The skin cleanser of the present invention can be applied to facial cleansers, hand soaps, body shampoos, and the like, and is particularly effective when used as a facial cleanser.

  Hereinafter, the present invention will be described with reference to examples and comparative examples. The present invention is not limited to these.

  The test methods of the sensory test shown in the examples and comparative examples are as follows. In addition, the compounding quantity of the composition shown in the following table | surfaces is each shown by%.

(1) Sensory test Face washing was performed by using 10 skin test samples. As a method, a sample of about 3 g was placed on the palm, foamed with 30 mL of tap water for 20 seconds, and the face was washed. Sensory evaluation of the degree of friction with the skin at that time was performed to obtain an average evaluation score. In addition, sensory evaluation was performed on the freshness, smoothness, and tightness of the washed-up skin, and an average evaluation score was obtained. The evaluation criteria are as follows.

<Friction degree>
4: No friction feeling 3: Feeling a little friction 2: Feeling a friction 1: Very feeling a friction

<Feel fresh after washing>
4: Very good 3: Good 2: Slightly bad 1: Bad

<Smooth feeling after washing>
4: Very good 3: Good 2: Slightly bad 1: Bad

<Feeling of washing up>
4: Not pulling at all 3: Feeling a little gripping 2: Pulling 1: Very squeezing

Examples 1-7, Comparative Examples 1-3
A skin cleanser (face wash) having the formulation shown in Table 1 was prepared by a conventional method, and the above tests were performed. The results are also shown in Table 1.

  As is clear from Table 1, all of the skin cleansing agents of Examples using the components of the present invention had excellent performance. On the other hand, the comparative example lacking any of the essential ingredients is inferior in terms of the degree of friction on the skin, the freshness of the washed-up skin, the feeling of smoothness, and the feeling of smoothness, and the object of the present invention can be achieved. There wasn't.

Example 6 (Liquid face wash) (%)
N-lauroyl-L-glutamic acid triethanolamine 10.0
(Product name: Amisoft LT12, manufactured by Ajinomoto Co., Inc.)
Palm oil fatty acid glycine sodium 10.0
(Product name: Amilite GCS-11, manufactured by Ajinomoto Co., Inc.)
・ Cocoyl Methyl Taurine Sodium 0.5
(Product name: Diapon K-SF, manufactured by Nippon Oil & Fats Co., Ltd.)
(Alkyl alkylate / steareth-20) copolymer dispersion (30%) 5.0
(Product name: Aculin 22, Rohm & Hass)
・ Lauramid sodium diacetate 3.0
(Product name: Nissan Anon LA, manufactured by Nippon Oil & Fats Co., Ltd.)
・ PORYQUATERNIUM-44 0.15
(Product name: LUVIQUAT ULTRACARE, BASF, pure conversion)
1,3-butylene glycol 5.0
・ Glycerin 10.0
・ Glycol distearate 1.0
・ Edetic acid disodium 0.1
・ Methyl paraoxybenzoate 0.1
・ Phenoxyethanol 0.1
・ Potassium hydroxide 0.5
・ Citric acid 0.08
・ Sodium citrate 0.02
・ Octenyl succinate corn starch aluminum 1.0
(Product name: DRY-FLO PC, manufactured by NSC Japan)
・ Dipotassium glycyrrhizinate 0.1
・ Lemon extract 0.1
・ Mixed fruit extract 0.1
(Product name: Multifruit BSC,
(Arch Personal Care Products)
・ Fragrance 0.2
・ Purified water balance

  When the above composition was prepared and evaluated by a conventional method, it had excellent performance with respect to foaming, foam quality, slippery smoothness and skin brightness.

Example 7 (face wash) (%)
Palm oil fatty acid glycine sodium 10.0
(Product name: Amilite GCS-11, manufactured by Ajinomoto Co., Inc.)
・ Lauryldimethylaminoacetic acid betaine 5.0
(Product name: Genamin B1566J, Clariant, pure conversion)
・ Lamidate amidopropyl betaine 5.0
(Product name: Anholex LB2, manufactured by Miyoshi Oil & Fats Co., Ltd.)
(Alkyl alkylate / steareth-20) copolymer dispersion (30%) 5.0
(Product name: Aculin 22, Rohm & Hass)
・ Lauramid sodium diacetate (trade name: NISSAN ANON LA, manufactured by NOF Corporation, pure content conversion) 3.0
・ PORYQUATERNIUM-7 0.5
(Product name: Marcote 550, manufactured by Ondeonalco Co., Ltd.)
・ Dipropylene glycol 10.0
・ Glycerin 10.0
・ Edetic acid disodium 0.1
・ Methyl paraoxybenzoate 0.1
・ Phenoxyethanol 0.1
・ Potassium hydroxide 0.5
・ Methylsiloxane network polymer 0.1
(Product name: Tospearl 145, manufactured by Toshiba Silicone)
・ Dipotassium glycyrrhizinate 0.1
・ Lemon extract 0.1
・ Mixed fruit extract 0.1
(Product name: Multifruit BSC,
(Arch Personal Care Products)
・ Fragrance 0.2
・ Purified water balance

  When the above composition was prepared and evaluated by a conventional method, it had excellent performance with respect to foaming, foam quality, slippery smoothness and skin brightness.

  In addition, the composition of the fragrance | flavor used in the said Example is shown in Table 2.

Claims (1)

(A) The following general formula (1)

(Wherein R ₁ is an alkyl group having 10 to 30 carbon atoms, R ₂ is a group selected from hydrogen, methyl group, and —COOH group, and n is an integer of 1 to 50). And a thickening polymer compound having acrylic acid and / or methacrylic acid as constituent components,
(B) 1.0 to 30% by mass of one or more acylamino acid surfactants selected from N-acylglutamate and N-acylglycine salts ;
(C) A face wash comprising an alkylaminodicarboxylic acid type surfactant.