JP2006188435A - Skin-cleansing agent composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a skin-cleansing agent composition equipped with excellent stability under both a low temperature preservation and high temperature preservation, excellent in solubility in water, foaming property and cleansing power, having a suitable scrubbing feeling on use and suppressing tight feeling after the use. <P>SOLUTION: This skin-cleansing agent composition contains (A) lauric acid amide propylamine oxide, (B) a higher fatty acid salt, (C) a powdery material and (D) a polyalkylene glycol. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a skin cleansing composition. More specifically, the present invention relates to a skin cleansing composition that can be suitably used for applications such as face cleansing agents, body soaps, hand soaps, body shampoos, and the like.

  In recent years, the mainstream of skin cleansing compositions has become higher fatty acid soaps having semi-solids typified by pastes or gels. The highest characteristics of the higher fatty acid soap include excellent detergency and bubble power, and a good refreshing feeling after rinsing.

  However, higher fatty acid soaps have significant changes in physical properties due to temperature changes, and crystals of higher fatty acid salts are likely to precipitate under low temperature storage, and higher fatty acid salts may discolor or liquefy under high temperature storage. There is a disadvantage that separation occurs due to the difference in specific gravity.

  In order to eliminate this drawback, it has been studied to improve the solubility of fatty acid salts and improve stability under low-temperature storage. For example, a gel-like detergent composition containing a high concentration of polyhydric alcohols The thing is proposed (for example, refer patent document 1 and patent document 2).

  However, since this gel-like cleaning composition contains a high concentration of polyhydric alcohol, there is a drawback in that foaming properties are reduced, the refreshing feeling after rinsing is impaired, and sliminess and stickiness occur. .

  Moreover, in order to prevent discoloration under high temperature storage, a transparent gel-like detergent composition containing a fatty acid salt, an amidoamine oxide type surfactant and a phosphonic acid derivative has been proposed (see, for example, Patent Document 3). .

  However, this transparent gel detergent composition has the disadvantage that higher fatty acids are liquefied and separation occurs due to the difference in specific gravity with water.

JP-A-63-57699 JP-A-9-221698 Japanese Patent Laid-Open No. 2002-3884

  The present invention has been made in view of the above-described prior art, has excellent stability under low temperature storage and high temperature storage, is excellent in water solubility, foamability and detergency, and suitable for use. An object of the present invention is to provide a skin cleanser composition that has a good scrub feeling and suppresses the feeling of tension after use.

  The present invention relates to a skin cleanser composition comprising (A) lauramidopropylamine oxide, (B) a higher fatty acid salt, (C) powder and (D) polyalkylene glycol.

  The skin cleanser composition of the present invention has no precipitation of fatty acid salt under low temperature storage, does not cause liquefaction phenomenon under high temperature storage, has excellent stability, is excellent in foaming properties and detergency, and is a fatty acid soap. It has the effect of suppressing the tension feeling peculiar to, having an appropriate scrub feeling during use, and being excellent in solubility in water.

  (A) Lauric acid amidopropylamine oxide is a component that enhances detergency and foamability and imparts stability over a wide temperature range.

  Lauric acid amidopropylamine oxide is readily commercially available. Examples of products of lauric acid amidopropylamine oxide include, for example, product name: SOFTAZOLINE LAO-C manufactured by Kawaken Fine Chemicals Co., Ltd.

  The content of lauric acid amidopropylamine oxide in the skin cleanser composition of the present invention increases the detergency and foamability, provides stability in a wide temperature range, and forms micelles composed of fatty acid salts. From the viewpoint of holding, it is preferably 0.1 to 30% by weight. The lower limit of the content of lauric acid amidopropylamine oxide is 0.1% by weight or more, preferably 1% by weight or more, from the viewpoint of improving detergency and foamability and imparting stability in a wide temperature range. More preferably, it is desirably 5% by weight or more, and the upper limit thereof is 30% by weight or less, preferably 25% by weight or less, more preferably 20% by weight from the viewpoint of maintaining the micelle formation constituted by the fatty acid salt. The following is desirable.

(B) A higher fatty acid salt is a component which improves foaming power and detergency.
The higher fatty acid constituting the higher fatty acid salt is not particularly limited, and specific examples thereof include higher fatty acids having 12 to 22 carbon atoms such as lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, and behenic acid, Examples thereof include vegetable oils such as olive oil, coconut oil, palm oil, and cottonseed oil, and animal oils such as fish oil and beef tallow. These may be used alone or in combination. Among these, from the viewpoint of improving foaming power and detergency, higher fatty acids having 12 to 22 carbon atoms are preferable, and at least one selected from the group consisting of lauric acid, myristic acid, palmitic acid and stearic acid Is more preferable.

  The higher fatty acid salt can be prepared by saponifying or neutralizing the higher fatty acid with an alkali.

  Examples of the alkali include inorganic alkalis such as sodium hydroxide, potassium hydroxide, sodium carbonate, and potassium carbonate, and organic alkalis such as monoethanolamine, diethanolamine, triethanolamine, trimethylamine, and triethylamine. These can be used alone or in admixture of two or more. Among these, from the viewpoint of improving the temperature stability of the preparation of the skin cleansing composition of the present invention, an organic alkali is preferable, and triethanolamine is more preferable.

  The higher fatty acid salt can be used after a higher fatty acid and an alkali are prepared in advance as a higher fatty acid salt, and the higher fatty acid salt, which is a raw material for the higher fatty acid salt, is blended in the skin cleansing composition. It may be a fatty acid salt.

  The higher fatty acid constituting the higher fatty acid salt is easily commercially available. Examples of higher fatty acid products include, for example, trade names: EDENOR C-12, EDENOR C-14, EDENOR C-16, EDENOR C-18, etc., manufactured by Henkel.

  The content of the higher fatty acid salt in the skin cleansing composition of the present invention is 5 to 35 wt.% From the viewpoint of increasing the foaming power and cleaning power and from the viewpoint of reducing irritation to the skin and preventing the viscosity from becoming too high. % Is preferred. The lower limit of the content of the higher fatty acid salt is preferably 5% by weight or more, preferably 10% by weight or more from the viewpoint of enhancing foaming power and detergency. From the viewpoint of softening and preventing the viscosity from becoming too high, it is desirable that the content be 35% by weight or less, preferably 25% by weight or less.

(C) Powder is a component that imparts a scrub feeling and improves foamability and detergency.
As the powder, those that impart a scrub feeling are preferred. Specific examples of suitable powders include organic powders such as polyethylene powder and polypropylene powder, and inorganic powders such as talc, silicon powder, and titanium oxide powder. These may be used alone or in combination of two kinds. You may mix and use the above. Among these, polyethylene powder and talc are preferable from the viewpoint of enhancing the feeling of use as a scrub and improving foaming properties.

  The average particle diameter of the powder is not particularly limited, but is preferably 50 to 1000 μm from the viewpoint of imparting a scrub feeling and improving the feeling of use. The lower limit of the average particle diameter of the powder is 50 μm or more, preferably 100 μm or more from the viewpoint of imparting a scrub feeling, and the upper limit is 1000 μm or less from the viewpoint of improving the feeling of use. Preferably it is 500 μm or less. The average particle diameter of the powder is a value measured by a laser diffraction / scattering method, but the present invention is not limited to such a measurement method.

  The powder is easily commercially available. Examples of the powder product include, for example, Honeywell, trade name: AC polyethylene 6A, Matsumura Sangyo Co., Ltd., trade name: Crown Talc.

  The content of the powder in the skin cleansing composition of the present invention is 0.1 to 20% by weight from the viewpoint of enhancing the imparting of the scrub feeling and the feeling of use and suppressing the hardening of the skin cleansing composition. preferable. The lower limit of the content of the powder is desirably 0.1% by weight or more, preferably 0.5% by weight or more from the viewpoint of imparting a scrub feeling, and the upper limit increases the feeling of use. From the viewpoint of suppressing the hardening of the skin cleansing composition, it is desirably 20% by weight or less, preferably 10% by weight or less.

(D) Polyalkylene glycol is a component that improves foamability.
Specific examples of suitable polyalkylene glycols include polyethylene glycol, polypropylene glycol, polyoxyethylene polyoxypropylene glycol and polyoxypropylene glycol, which may be used alone or in combination of two or more. May be used. Among these, polyethylene glycol and polypropylene glycol are preferable from the viewpoint of improving foamability.

  The number average molecular weight of the polyalkylene glycol is preferably 200 to 20000 from the viewpoint of enhancing foamability and enhancing the feeling of use. In addition, the lower limit of the number average molecular weight of the polyalkylene glycol is desirably 200 or more, preferably 400 or more from the viewpoint of enhancing foamability, and is 20000 or less, preferably 2000 or less, from the viewpoint of enhancing the feeling of use. Preferably there is.

  Polyalkylene glycols are readily available commercially. As an example of the product of polyalkylene glycol, the Sanyo Chemical Industries Co., Ltd. product name: Sannix PP-400, PEG-400 etc. are mentioned, for example.

  The content of the polyalkylene glycol in the skin cleansing composition of the present invention is preferably 0.01 to 5% by weight from the viewpoint of improving foamability and improving usability. The lower limit of the content of polyalkylene glycol is 0.01% by weight or more, preferably 0.1% by weight or more, from the viewpoint of improving foamability, and the upper limit is the usability From the viewpoint of improving the content, it is desirably 5% by weight or less, preferably 3% by weight or less.

  The skin cleansing composition of the present invention may further contain (E) menthol in order to give a refreshing feeling during use or after use.

  Menthol is readily commercially available. Examples of menthol products include, for example, trade name: Menthol SP, manufactured by Takasago Incense Co., Ltd.

  The content of menthol in the skin cleansing composition of the present invention is preferably 0.01 to 2% by weight from the viewpoint of imparting a refreshing feeling and reducing the irritation to the skin. The lower limit value of the menthol content is 0.01% by weight or more, preferably 0.1% by weight or more, from the viewpoint of imparting a refreshing feeling, and the upper limit value relieves irritation to the skin. From the viewpoint, it is desired to be 2% by weight or less, preferably 1% by weight or less.

  In the present invention, water is used as the balance in order to mix the respective components so that the total amount becomes 100% by weight. As water, it is usually preferable to use purified water.

  In addition, the skin cleansing composition according to the present invention is not limited to the effects of the present invention, but in addition to the above-described components, components usually used in cosmetics such as surfactants, animal and plant origin Fats and oils, silicones, lower alcohols, extracts derived from animals and plants, moisturizers, thickeners, UV absorbers, anti-inflammatory agents, metal sequestering agents, vitamins, antioxidants, antiseptic / disinfectants, pH adjusters, colorants, Various fragrance | flavors etc. can be mix | blended suitably according to the objective.

  The skin cleansing composition of the present invention thus obtained can be suitably used for facial cleansing agents, body soaps, hand soaps, body shampoos and the like. Among these, the skin cleanser composition of the present invention can be suitably used as a facial cleanser because it enhances the scrub effect and hardly gives a feeling of tension against the skin.

  Next, the present invention will be described in detail based on examples, but the present invention is not limited to such examples.

Examples 1-6 and Comparative Examples 1-5
A skin cleansing composition was prepared by mixing each component according to a conventional method using each component described in Table 1 and Table 2.

  In addition, Kawaken Fine Chemicals Co., Ltd. brand name: Softazolin LAO-C was used as lauric acid amidopropylamine oxide.

  Next, the following tests were performed using the obtained skin cleanser composition. The results are shown in Tables 1 and 2.

(1) Foamability
After enclosing 50 mL of a 2% aqueous solution of the skin cleansing composition in a 250 mL calibrated container (inner diameter 7.0 cm, height 13.5 cm) and stirring for 5 seconds with a desktop mixer at 25 ° C., the cleaning solution The volume increase rate (%) was measured as foaming force and evaluated according to the following evaluation criteria.

<Evaluation criteria>
◎: Increase rate is 400% or more ○: Increase rate is 300% or more and less than 400% △: Increase rate is 200% or more and less than 300% ×: Increase rate is 100% or more and less than 200%

(2) Detergency Warm artificial sebum (Composition: Tonshi 40% by weight, oleic acid 13% by weight, porcine myristin 12% by weight, squalene 12% by weight, paraffin wax 10% by weight, stearic acid monoglycerol 3% by weight, cholesterol 2% by weight, the remaining red No. 202) was made a cloth soaked with keratin cloth (3 cm × 3 cm) as a contaminated cloth, and this contaminated cloth was immersed in a 10% aqueous solution of the skin cleanser composition at 50 ° C. for 1 hour, Washed with water.

Detergency (%) for each contaminated cloth:
[Detergency (%)] = [(artificial sebum amount at application-artificial sebum amount after washing)] / (artificial sebum amount at application) × 100
And was evaluated according to the following evaluation criteria.

<Evaluation criteria>
◎: Detergency is 75% or more ○: Detergency is 50% or more and less than 75% △: Detergency is 25% or more and less than 50% ×: Detergency is less than 25%

(3) Evaluation 1 of skin cleanser composition (scrubbing feeling)
Ten professional panels conducted a face wash test using the skin cleansing composition, and sensory evaluation of the scrub feeling (scrub effect) during use was made according to the following evaluation criteria. The results are also shown in Tables 1 and 2.

<Evaluation criteria for feeling of scrub>
A: Sufficient scrub effect (evaluated that 8 or more people have a scrub effect)
○: A scrub effect is recognized (evaluated that 6 to 7 people have a scrub effect)
Δ: Not much scrubbing effect (3-5 people evaluated that scrubbing effect)
X: No scrub effect (evaluated that 2 or less have a scrub effect)

(4) Evaluation 2 of skin cleansing composition (feeling of tension)
Ten professional panelists conducted a face wash test using the skin cleanser composition and sensory-evaluated the feeling of skin tension after use according to the following evaluation criteria.

<Evaluation criteria for tension>
◎: Very good (8 or more people answered that they did not stretch)
○: Good (6-7 people responded that they did not stretch)
△: Normal (3 to 5 people answered that they did not stretch)
×: Defect (Responded that 2 or less people do not stretch)

(5) Evaluation 3 of skin cleansing composition (solubility in water)
10 expert panelists put 2g of skin cleanser composition and 2g of water on their palms, tested the speed of water blending when lightly mixed with their fingers, and measured their solubility in water according to the following evaluation criteria. evaluated.

<Evaluation criteria for solubility in water>
◎: Very good (8 or more people answered good)
○: Good (6-7 people answered good)
Δ: Normal (3 to 5 people are good)
X: Defect (answer that 2 or less is good)

(6) Evaluation 4 of skin cleanser composition (exhilaration)
Ten professional panels conducted a face wash test using the skin cleanser composition, and sensory evaluation was performed according to the following evaluation criteria for the refreshing feeling during use and after use.

<Evaluation criteria for exhilaration>
◎: Exhilarating feeling is sufficient (evaluated that 8 or more people feel exhilarating)
○: Some refreshing feeling (evaluated that 6 to 7 people feel refreshed)
△: There is no refreshing feeling (evaluated that 3 to 5 people feel refreshed)
X: No refreshing feeling (evaluated that 2 or less people feel refreshing)

(7) Low-temperature stability After the skin cleanser composition is sealed in a 50 mL sample tube and stored in a thermostatic bath at −3 ° C. for 120 hours, the system state is visually observed and evaluated according to the following evaluation criteria. did.

<Evaluation criteria>
A: No change immediately after production.
○: Slight precipitation of fatty acid salt is observed.
Δ: Precipitation of fatty acid salt is observed, but dissolves when returned to room temperature.
X: Precipitation of fatty acid salt was observed, and the state did not change even when returned to room temperature.

(8) High temperature stability The skin cleanser composition was sealed in a 50 mL sample tube and stored in a constant temperature bath at 55 ° C. for 120 hours, then the state of the system was visually observed and evaluated according to the following evaluation criteria. .

<Evaluation criteria>
○: Same as immediately after manufacture.
Δ: Slight separation is observed.
X: Separation is clearly observed.

  From the results shown in Table 1, each of the skin cleanser compositions obtained in each Example has a foaming power and a cleansing power compared to the skin cleanser compositions obtained in each Comparative Example. Excellent, does not cause precipitation of fatty acid salts even when stored at a low temperature of -3 ° C, and does not cause obvious discoloration and separation even when stored at a high temperature of 55 ° C, indicating that the temperature stability is very high. .

  Furthermore, the skin cleanser composition obtained in each example expresses an appropriate scrub effect at the time of use, and exhibits an excellent feeling of use that has a refreshing feeling while suppressing a feeling of tension after use. .

  Hereinafter, formulation examples of the skin cleanser composition part according to the present invention will be shown. In addition, the unit of content is weight% in any case.

Formulation Example 1 (Face Wash)
A face cleanser was prepared by mixing the following components.
Lauric acid 5.0
Myristic acid 7.2
Palmitic acid 4.5
Stearic acid 5.0
Lauric acid amidopropylamine oxide 20.0
Triethanolamine 14.0
Polypropylene glycol 400 2.0
Ethylene glycol distearate 1.0
Sodium dihydrogen phosphate 0.8
Talc 2.0
Menthol 0.5
Hydroxypropyl methylcellulose 0.5
Methyl paraoxybenzoate 0.3
Propyl paraoxybenzoate 0.1
Purified water balance Total 100.0

Formulation Example 2 (face wash)
A face cleanser was prepared by mixing the following components.
Lauric acid 5.0
Myristic acid 10.0
Palmitic acid 4.0
Lauric acid amidopropylamine oxide 20.0
Triethanolamine 14.0
Polypropylene glycol 400 2.0
Polyethylene glycol 400 1.0
Ethylene glycol distearate 1.0
Sodium dihydrogen phosphate 0.8
Polyethylene powder 2.0
Menthol 0.5
Hydroxypropyl methylcellulose 0.5
Methyl paraoxybenzoate 0.1
Purified water balance Total 100.0

  The skin cleansing composition of the present invention can be suitably used for applications such as facial cleansers, body soaps, hand soaps, body shampoos and the like.

Claims (5)

  A skin cleansing composition comprising (A) amidopropylamine oxide laurate, (B) a higher fatty acid salt, (C) powder and (D) polyalkylene glycol.   (B) The skin cleanser composition according to claim 1, wherein the higher fatty acid constituting the higher fatty acid salt is at least one selected from the group consisting of lauric acid, myristic acid, palmitic acid and stearic acid.   The skin cleansing composition according to claim 1 or 2, wherein the powder (C) is at least one selected from the group consisting of polyethylene powder, polypropylene powder, talc, silicon powder and titanium oxide powder.   (D) The skin cleansing composition according to any one of claims 1 to 3, wherein the polyalkylene glycol is at least one selected from the group consisting of polyethylene glycol, polypropylene glycol and polyoxyethylene polyoxypropylene glycol.   Furthermore, the skin cleansing composition in any one of Claims 1-4 formed by containing (E) menthol.