JPS63132817A - Shaving foam composition - Google Patents

Abstract

PURPOSE:To obtain the titled composition effective in softening beard to facilitate the shaving of beard, giving cleanly shaven skin and reducing the skin stimulation, by using an ampholytic surfactant in combination with a specific cationic surfactant and a specific anionic surfactant at a specific ratio and compounding a propellant to the composition. CONSTITUTION:The objective shaving foam composition giving low stimulation to the skin, effective in softening beard to facilitate the shaving of beard, giving cleanly shaven smooth skin and having excellent usability can be produced by using (A) one or more ampholytic surfactants, (B) one or more mono-alkyl quaternary ammonium salt cationic surfactants of formula (R1 is 12-22C alkyl or alkenyl; R2-R4 are methyl or ethyl; X is halogen or methyl sulfate residue), (C) a carboxylic acid salt-type anionic surfactant and (D) a propellant such as flon, LPG, dimethyl ether, etc., as essential components at a molar ratio (B/C) of 4/6-8/2.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention comprises an amphoteric surfactant, a monoalkyl type quaternary ammonium salt type cationic surfactant, a carboxylate type anionic surfactant, and a propellant. To provide a shaving foam composition which is less irritating to the skin, makes the beard soft and easy to shave, provides a smooth shave and is easy to use.

[Conventional technology]

Conventionally, shaving foam compositions for shaving use inorganic alkali salts and organic alkali salts of higher fatty acids as products to make the pH alkaline and soften the beard. However, when the pH is alkaline, although it is effective for softening the beard, it is not preferable because it causes roughness and roughness on the skin after shaving. In addition, cationic surfactants, mainly containing quaternary ammonium salts, are effective for softening hair, but they are generally recognized to be highly irritating to the skin, and there is also concern that they may corrode aerosol containers. .

[Means to solve the problem]

The present inventors conducted intensive research to obtain a shaving foam composition that softens the beard, makes it easy to shave, gives a smooth finish after shaving, and is less irritating to the skin. together with a monoalkyl type quaternary ammonium salt type cationic surfactant,
It has been found that an aerosol composition prepared by combining carboxylate type anionic surfactants in a specific ratio and adding a propellant to the mixture satisfies the above objectives.

Generally, when an anionic surfactant and a cationic surfactant coexist in an aqueous solution, a complex is formed in the crystal phase, the complex becomes a precipitate, and the aqueous solution becomes cloudy or separates. That is, the quaternary ammonium salt type cationic surfactant may be a sulfonate type such as a higher alkyl sulfonate, a sulfate ester salt type such as a higher alcohol sulfate ester salt, or a phosphoric acid salt such as a polyoxyethylene alkyl ether phosphate ester salt. When an anionic surfactant such as an ester salt type is mixed in an aqueous solution, a complex is formed in the crystal phase at any molar ratio, and the complex becomes a precipitate, making the aqueous solution cloudy or separated. Only in the case of a combination of a quaternary ammonium salt type cationic surfactant and a carboxylate type anionic surfactant, when they coexist in a specific molar ratio in an aqueous solution, a complex is formed in the solution rather than in the crystal phase. do. This complex is transparent, has an excellent softening effect, is less irritating to the skin, and is less corrosive to aerosols.

However, although this complex has the above-mentioned advantages, it has poor foaming power and increases in viscosity at low temperatures, making it unsuitable for use as an aerosol stock solution.
As a result of further intensive research, the present inventors have found that by adding an amphoteric surfactant to this composition, the composition can be foamed without sacrificing the advantages of softening effect, skin safety, and low corrosion resistance of the aerosol can. They discovered that it was possible to impart strength and low-temperature stability, and completed the present invention.

That is, the present invention comprises: (1) one or more amphoteric surfactants; , X represents a halogen atom or a methyl sulfate residue; one or more monoalkyl quaternary ammonium salt type cationic surfactants; ■ a carboxylate type anionic surfactant; This aerosol composition contains a propellant such as chlorofluorocarbon, L, P, G, dimethyl ether, etc., and is characterized in that the molar ratio of ■/■ is in the range of 4/6 to 8/2.

The present invention will be explained in detail below.

As the amphoteric surfactant used in the present invention, all amphoteric surfactants commonly used in cosmetics can be used. To give a specific example, 2-undecyl-N, N,
N-(hydroxyethylcarboxymethyl)-2-imidacillin sodium, 2-cocoyl-2-imidazolinium hydroxide-1-carboxyethyloxy-2-
Imidazoline amphoteric surfactants such as sodium, 2-
Betaine-based amphoteric surfactants such as heptadecyl-N-carboxymethyl-N-hydroxyethylimidazolium betaine, lauryldimethylaminoacetic acid betaine, N-
Examples include alkylaminoacetic acids such as laurin-β-alanine and N-stearyl-β-alanine, alkylbetaines, aminobetaines, amine oxides, and sulfobetaines.

In the present invention, one or more of these amphoteric surfactants are selected and used. The blending amount is not particularly limited, but is generally 0.1 to 20% by weight, preferably 1 to 15% by weight. 0.1% by weight
If the amount is less than 20% by weight, sufficient foaming power cannot be imparted to the complex, and if the amount exceeds 20% by weight, there is a risk of skin irritation, which is not preferable.

The quaternary ammonium salt type cationic surfactant used as a component of the composition of the present invention has the general formula (wherein R1 is an alkyl group or alkenyl group having 12 to 22 carbon atoms, and It is one or more types of monoalkyl type represented by (representing a residue). If a quaternary ammonium salt type cationic surfactant such as a dialkyl type is used instead of a monoalkyl type, crystals will precipitate and the desired composition will not be obtained.

The carboxylate type anionic surfactant used as a component of the composition of the present invention has, for example, i) general formula (wherein R is an alkyl group or alkenyl group having 8 to 18 carbon atoms, M is an alkali metal , an organic amine, one type of basic amino acid represents two or more types), ii) a fatty acid soap type anionic surfactant represented by the general formula % formula % (in the formula, R is an alkyl group having 8 to 22 carbon atoms or ether carboxylate type anionic surfactant represented by an alkylaryl group, n is an integer of 0 or 1 to 16, M represents one or more types of alkali metal organic amine basic amino acids, iii) General N-acyl sarcosine represented by the formula % formula % (wherein R represents an alkyl group or alkenyl group having 8 to 18 carbon atoms, and M represents one or more types of alkali metals, organic amines, and basic amino acids) Salt-type anionic surfactant or 1v) General formula % Formula % (In the formula, R is an alkyl group or alkenyl group having 8 to 18 carbon atoms, and M is one or more of an alkali metal, an organic amine, and a basic amino acid. Anionic surfactants having a -COO- group can be mentioned in the general formula represented by a condensate of a higher fatty acid and an amino acid such as N-acylglutamate, which is represented by the following formula.

In the present invention, one or more of these may be used. The molar ratio of (1)/(2) is in the range of 4/6 to 8/2, preferably in the range of 515 to 7/3. In this composition, if the molar ratio is less than 4/6, the softening effect will be poor, and if it exceeds 8/2, the skin will be irritated, which is undesirable. As for the blending amount, the total amount of (1) and (10) is 0.1 to 10% by weight, preferably 0.5 to 8% by weight, based on the total amount of the composition. If the amount is 0.1% by weight, the amount of surfactant will be insufficient, so it will not be possible to obtain a sufficient softening effect, and if the amount exceeds 10% by weight, it will not only cause strong irritation to the skin, but also cause irritation to the skin. It is also undesirable due to corrosion.

(2) As the propellant used in the composition of the present invention, all propellants used in general aerosol products can be used. Specifically, fluorinated hydrocarbons such as Freon 11 (registered trademark), Freon 12 (registered trademark), Freon 21 (registered trademark), Freon 113 (registered trademark), and Freon 114 (registered trademark), propane Liquefied petroleum gas (L, P
, G, ), liquefied gases such as dimethyl ether, and compressed gases such as carbon dioxide gas and nitrogen gas.

These gases can be used alone or in combination of two or more types, and the blending amount is 2 to 20% by weight. If it is less than 2%, the internal pressure will be low and the undiluted solution may not be sprayed well until the end of use. Also, even if 20% or more of gas is added, no particularly good results are obtained, and on the contrary, the internal pressure becomes too high.

In addition to the above-mentioned essential ingredients, the composition of the present invention can also contain ingredients and additives commonly used in cosmetics. That is, oils such as higher alcohols, silicone oils, liquid paraffin, and ester oils, water-soluble polymers such as methylcellulose and bitroxyethylcellulose, and cationic polymers such as cationically modified cellulose ether derivatives (Polymer JR (manufactured by Union Carbide Corporation), etc.) molecules, polyoxyethylene (hereinafter referred to as POE), hydrogenated castor oil, nonionic surfactants such as POE alkyl ethers, natural extracts of plants and animals and their derivatives, citric acid,
Organic acids such as lactic acid, inorganic salts such as sodium chloride and potassium chloride, fragrances, coloring agents, preservatives, chelating agents, ultraviolet absorbers, etc. may be appropriately added within the range that does not impair the effects of the present invention.

〔Example〕

Next, the present invention will be explained in more detail with reference to Examples.

The present invention is not limited thereby.

The effects were measured using the following test methods and evaluation methods.

Test method, evaluation method (1) Beard flexibility test The two items of ``beard softness'' and ``ease of shaving'' were conducted using a panel of 15 men. Approximately 3 g of the sample was applied around the lips, and the flexibility of the beard and ease of shaving were evaluated by sensitivity.

Evaluation was performed on a four-level scale. The results are shown in Table 1 as ◎ if it is extremely good, ◎ if it is good, △ if it is fair, and × if it is poor.

(2) Skin irritation It is known that skin irritation can be evaluated by the strength of protein denaturation (protein denaturation rate) of surfactants and surfactant compositions (Japanese Patent Publication No. 59-42038).
The skin irritation of the composition of the present invention was evaluated based on the protein denaturation rate based on this evaluation method.

Protein denaturation rate Using aqueous high performance liquid chromatography, when a sample is added to an ovalbumin pH 1m solvent at a sample concentration of 1%, the ovalbumin denaturation rate is 220 na+
It was measured using the absorption peak of

N.

Ho: Height of the 220 nm absorption peak of ovalbumin, H8: 2 when the sample is added to the ovalbumin buffer solvent.
The height of the 20 na+ absorption peak was evaluated using the following four-level evaluation.

◎・・・・・・Very little skin irritation ・Egg white albumin denaturation rate less than 30% O ・・・・・・Less skin irritation ・Egg white albumin denaturation rate 30% or more and less than 60% △・・・・・・...Moderate skin irritation - Ovalbumin degeneration rate 60% or more and less than 80% × ...Moderate skin irritation - Ovalbumin degeneration rate 80% or more (3) Abscess edible epoxy resin coat on the inner surface After filling the aluminum can with the stock solution and propellant, crimping is performed, and the product is heated for 2 months.
It was left in a constant temperature bath at 35°C. After 2 months, the can was opened, the condition inside the can was observed, and the state of corrosion was determined according to the following criteria.

O... Good △... Pitting ×... Penetration Examples 1 to 7 ・ A composition consisting of the formulation described in (Table 1) was prepared, Its shaving effect, skin irritation, and abscess eating properties are shown together with comparative examples. Examples in which additives and the like were added are also described.

Example 8 A shaving foam composition having the following composition was prepared (cationic surfactant/anionic surfactant molar ratio: 6/4) and evaluated in the same manner as in Examples 1 to 7.

(% by weight) 2-Undecyl-N,N,N-(hydroxymethylcarboxymethyl)-2-imidazolinodium (manufactured by Union Carbide) 5.0C16 alkyltrimethylammonium chloride (average molecular weight 320
) 0.7 Sodium lauroylalanine (average molecular weight 307) 0.
45 Glycerin 5.0 Polyoxyethylene (average 60 mol) Hydrogenated castor oil derivative 1.0 Cetostearyl alcohol 2.0 Aloe extract 0.1 Fragrance
Flow propellant (Freon/L, P, G, = 7/3)
6.0 ion exchange water
Remainder (Results) This shaving foam composition had excellent beard softening effects, was easy to shave, and was less irritating to the skin.

Example 9 A shaving aerosol composition was prepared with the following ingredients: cationic surfactant/anionic surfactant molar ratio of 7/
3) Evaluation was performed in the same manner as in Examples 1 to 8.

(Weight %) Lauryldimethylaminoacetic acid betaine 10.0C
22 Alkyltrimethylammonium chloride (average molecular weight 404) 1.0 Sodium lauroyl sarcosine (average molecular weight 310) 0.
33 dipropylene glycol 8.0
Glyceryl monostearate 1.0 Stearyl alcohol 1.5 Vitamin E acetate 0.2 Fragrance/Coloring agent Volume propellant (L, P
, G, ) 5.0 Ion-exchanged water Remainder (Results) This shaving foam composition had excellent beard softening effects, was easy to shave, and was less irritating to the skin.

Claims (1)

[Scope of Claims] (1) one or more amphoteric surfactants;
) General formula ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (In the formula, R_1 is an alkyl group or alkenyl group having 12 to 22 carbon atoms, R_2, R_3 and R_4 are methyl or ethyl groups, and X is a halogen atom or methylfluor.) (3) a carboxylate type anionic surfactant; (4) Freon, L ．． P. G. , a propellant such as dimethyl ether, and a shaving foam composition characterized in that the molar ratio of (2)/(3) is in the range of 4/6 to 8/2.