JP2013091641A - Foaming aerosol product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foaming aerosol product that can prevent corrosion of a pressure-resistant container made of a metal in spite of having no inner bag by suppression of chloride ion while maintaining a finger-combing property during rinsing by an action of cationic polymer.SOLUTION: The foaming aerosol product is obtained by packing a pressure-resistant container with [A] a stock solution containing an anionic surfactant and a cationic polymer and [B] a propellant. The chloride ion concentration of [A] the stock solution is ≤500 mass ppm and the pressure-resistant container is made of a metal and has no inner bag. The foaming aerosol product is preferably used as a shampoo. The nitrogen content of the cationic polymer is preferably ≤2.0 mass%. Preferably [A] the stock solution further contains an amphoteric surfactant and the content of the amphoteric surfactant in [A] the stock solution is ≤3 mass%.

Description

  The present invention relates to foamable aerosol products.

  For hair treatment agents such as hair mousse and other cosmetics, for ease of use, fill the pressure-resistant container with the stock solution and propellant, spray the stock solution with the propellant, foam it, and apply the formed foam. Effervescent aerosol products that clean hair and the like have become widespread (see JP 2012-136485 A). In such foamable aerosol products, a pressure vessel made of metal such as aluminum is usually used from the viewpoint of securing the pressure resistance of the vessel.

  On the other hand, cosmetics such as shampoos usually contain a cationic polymer in the stock solution in order to improve the ease of rinsing, and as a result, chloride ions as counter anions remain in the stock solution. Cheap. Since this chloride ion is highly corrosive to metals, when applied to the foamable aerosol products described above, a resin layer is provided on the inner surface of the pressure vessel to prevent corrosion, or an inner bag in which a stock solution or propellant is inserted. It is necessary to devise such a method (see Japanese Patent Application Laid-Open No. 2004-59089).

  However, due to peeling of the resin layer, penetration of chloride ions into the resin layer, or rupture of the inner bag, etc., the chloride ions and the metal of the pressure vessel come into contact with each other, and the corrosion of the vessel proceeds and the contents are There is a risk of leakage. In addition, the device for the above-described conventional pressure vessel causes an increase in manufacturing cost.

JP 2012-136485 A JP 2004-59089 A

  The present invention has been made based on the circumstances as described above, and the purpose thereof is to maintain the fingering property by the action of the cationic polymer, and to provide an inner bag by suppressing chloride ions. Is to provide foamable aerosol products that can prevent corrosion of metal pressure vessels.

The invention made to solve the above problems is
[A] A stock solution containing an anionic surfactant and a cationic polymer (hereinafter also referred to as “[A] stock solution”), and [B] a foamable aerosol product filled with a propellant in a pressure-resistant container. ,
The chloride ion concentration of the above [A] stock solution is 500 ppm by mass or less,
The pressure-resistant container is a foamable aerosol product characterized in that it is made of metal and does not have an inner bag.

  The foamable aerosol product contains a [A] stock solution containing a cationic polymer, and the chloride ion concentration of this [A] stock solution is 500 ppm by mass or less. Corrosion of a metal pressure vessel having no inner bag can be prevented by suppressing chloride ions in the stock solution [A] while maintaining fingering.

  The foamable aerosol product is preferably used as a shampoo. [A] The stock solution contains an anionic surfactant and a cationic polymer, and is excellent in detergency and ease of fingering during washing. Therefore, the foamable aerosol product is suitable as a shampoo.

  The nitrogen content of the cationic polymer is preferably 2.0% by mass or less. When the nitrogen content of the cationic polymer is within the above specific range, the concentration of chloride ions serving as counter ions can be suppressed, and as a result, corrosion of the metal pressure vessel can be prevented.

  [A] The stock solution further contains an amphoteric surfactant, and the content of the amphoteric surfactant in the [A] stock solution is preferably 3% by mass or less. By setting the content of the amphoteric surfactant in the above specific range, it is possible to further suppress the concentration of chloride ions serving as counter ions, and as a result, it is easy to prevent corrosion of the above-described metal pressure vessel and Be certain.

  [B] The propellant preferably contains carbon dioxide. [B] Since the propellant contains carbon dioxide, it has a blood circulation promoting action on the skin.

  The anionic surfactant preferably contains polyoxyethylene lauryl ether acetate and polyoxyethylene sulfosuccinate lauryl salt. Thereby, foamability such as ease of foam formation and sustainability of the formed foam are more excellent, and the elasticity of the foam becomes better.

  The mass ratio of the polyoxyethylene sulfosuccinic acid lauryl salt to the polyoxyethylene lauryl ether acetate is preferably 0.5 or more and 3.0 or less. By making the mass ratio in the specific range described above, lightness can be imparted to the foam quality, and when used as a shampoo, it can impart a sense of volume and softness to the hair after drying the hair. it can.

  Note that the chloride ion concentration refers to an analysis value obtained by ion chromatography (for example, by using “ICS-2000” manufactured by Dionex equipped with an anion exchange column “IonPacAS18” manufactured by Dionex). Analytical value is obtained.) The nitrogen content of the cationic polymer is the content of nitrogen atoms contained in the cationic polymer, and is a value based on the nitrogen determination method defined for each cationic polymer in the Quasi-drug raw material standard. (For cationic polymers that are not defined, values based on the Kjeldahl method are adopted.)

  The foamable aerosol product of the present invention prevents corrosion of a metal pressure vessel even without an inner bag by suppressing chloride ions, while maintaining the fingering property during washing by the action of a cationic polymer. can do.

<Foaming aerosol products>
The foamable aerosol product of the present invention includes [A] stock solution, [B] propellant, and a pressure vessel. As will be described later, this foamable aerosol product contains an anionic surfactant and a cationic polymer in the stock solution [A], and is excellent in detergency and ease of rinsing, so it is preferably used as a shampoo. be able to. Hereinafter, the foamable aerosol product will be described in detail.

[[A] Stock solution]
[A] The stock solution contains an anionic surfactant and a cationic polymer, and water such as purified water is blended therein (the blending amount of water in the [A] stock solution is, for example, 70% by mass or more. .) Moreover, [A] undiluted | stock solution may contain arbitrary components in the range which does not impair the effect of this invention.

  [A] The chloride ion concentration of the stock solution is 500 ppm by mass or less. [A] Since the chloride ion concentration of the stock solution is 500 ppm by mass or less, [A] the suppression of chloride ions in the stock solution can prevent the corrosion of the metal pressure resistant vessel, resulting in the corrosion of the vessel. It is possible to prevent the leakage of the resulting contents.

  [A] The chloride ion concentration of the stock solution is preferably 300 ppm by mass or less, more preferably 100 ppm by mass or less, from the viewpoint of preventing corrosion.

(Anionic surfactant)
An anionic surfactant is a component having foamability and detergency for removing dirt such as the scalp. In addition, you may use an anionic surfactant individually or in combination of 2 or more types.

  Examples of the anionic surfactant include acyl amino acids or salts thereof (sodium salt, potassium salt, triethanolamine salt, etc.); coconut oil fatty acid sodium, coconut oil fatty acid potassium, cocoyl isethionic acid or a salt thereof (sodium salt). Polyoxyethylene lauryl ether sulfuric acid or a salt thereof (sodium salt, potassium salt, etc.); polyoxyethylene lauryl ether acetic acid or a salt thereof (sodium salt, potassium salt, etc.); disodium alkylsulfosuccinate; polyoxy Ethylenesulfosuccinic acid or salts thereof (sodium salt, potassium salt, etc.); lauroyl hydrolyzed silk sodium; isostearic acid hydrolyzed silk AMP (2-amino-2-methyl-1-propanol, a condensate of isostearic acid and hydrolyzed silk) Salt); Illy hydrolyzed soybean protein potassium; cocoyl hydrolyzed collagen salt (sodium salt, potassium salt, etc.); sodium tetradecene sulfonate; polyoxyethylene lauryl ether phosphate or its salt (sodium salt, potassium salt, etc.) .

  Among these, as the anionic surfactant, from the viewpoint of foamability and foam quality, polyoxyethylene lauryl ether acetate (the average added mole number of polyoxyethylene in polyoxyethylene lauryl ether acetate is 2 or more) 12 or less, preferably 2 or more and 6 or less) and polyoxyethylene sulfosuccinic acid lauryl salt (the average added mole number of polyoxyethylene in polyoxyethylene sulfosuccinic acid lauryl salt is preferably 2 or more and 12 or less, and 2 or more 6 or less is more preferable), and it is more preferable that both of these are included. For the same reason, the polyoxyethylene lauryl ether acetate is more preferably sodium polyoxyethylene lauryl ether acetate, and the polyoxyethylene sulfosuccinate lauryl salt is more preferably disodium polyoxyethylene sulfosuccinate lauryl.

  [A] The content of the anionic surfactant in the stock solution is preferably 3% by mass or more and 30% by mass or less, more preferably 5% by mass or more and 25% by mass or less, from the viewpoint of effectively achieving soil removal and foaming properties. Preferably, 10 mass% or more and 20 mass% or less are more preferable.

  When the anionic surfactant contains polyoxyethylene lauryl ether acetate and polyoxyethylene sulfosuccinate lauryl salt, the mass ratio of polyoxyethylene sulfosuccinate lauryl salt to polyoxyethylene lauryl ether acetate is 0. It is preferably 5 or more and 3.0 or less, more preferably 0.7 or more and 2.5 or less, and further preferably 1.0 or more and 2.0 or less. By setting the mass ratio in the above range, lightness can be imparted to the foam quality, and when used as a shampoo, it is possible to impart a sense of volume and softness to the hair after drying the hair.

(Cationic polymer)
The cationic polymer is a component that improves the fingering property when washed off. In addition, you may use this cationic polymer individually or in combination of 2 or more types.

  Examples of the cationic polymer include cationized cellulose, cationized guar gum, vinylpyrrolidone / N, N-dimethylaminoethyl methacrylic acid copolymer diethyl sulfate, acrylamide / acrylic acid / dimethyldiallylammonium chloride copolymer, N, N-dimethylaminoethyl diethyl methacrylate methacrylate / N, N-dimethylacrylamide / polyethylene glycol dimethacrylate copolymer and the like.

  [A] The content of the cationic polymer in the stock solution is preferably 0.01% by mass or more and 2% by mass or less, and more preferably 0.1% by mass or more and 1% by mass or less. By making the content of the cationic polymer in the above range, it is possible to effectively improve the fingering property.

  The nitrogen content of the cationic polymer is preferably 2.0% by mass or less. By setting the nitrogen content of the cationic polymer in the above range, chloride ions serving as counter ions can be suppressed, and as a result, corrosion of the metal pressure vessel can be prevented.

  The nitrogen content of the cationic polymer is more preferably 1.8% or less, and still more preferably 1.6% or less, from the viewpoint of preventing corrosion.

(Amphoteric surfactant)
An amphoteric surfactant is a surfactant having an acidic functional group and an alkaline functional group in the same molecule.

As the amphoteric surfactant, for example,
Amidopropyl betaine-type amphoteric surfactants include amide propyl betaine laurate (lauramide propyl betaine), coconut oil fatty acid amide propyl betaine, isostearic acid amide propyl betaine (isostearamidopropyl betaine), linolenic acid amide propyl, palm oil fatty acid Amidopropyl betaine, etc .;
As an imidazoline type amphoteric surfactant, undecyl-N-hydroxyethyl-N-carboxymethylimidazolinium betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine and the like;
As sulfobetaine-type amphoteric surfactants, sodium N-alkyl-N, N-dimethylammonium-N-propylsulfonate, sodium N-alkyl-N, N-dimethylammonium-N- (2-hydroxypropyl) sulfonate, N-fatty acid amidopropyl-N, N-dimethylammonium-N- (2-hydroxypropyl) sulfonate sodium salt and the like;
Examples of amidoamine oxide type amphoteric surfactants include lauric acid amidopropyldimethylamine oxide.

  [A] The content of the amphoteric surfactant in the stock solution is preferably 3% by mass or less, more preferably 2% by mass or less, and still more preferably 1% by mass or less. By making the content of amphoteric surfactant in the above range, chloride ions, which are counter ions, can be suppressed. As a result, corrosion of the metal pressure resistant container is prevented and the contents caused by the corrosion of the container Can prevent leakage. Moreover, by making the said content into the said range, [A] viscosity increase of a stock solution is suppressed and foamability becomes favorable.

(Optional component)
[A] A known shampoo component may be mentioned as an optional component that the stock solution may contain. Examples of the optional component include nonionic surfactants, lower alcohols, polyhydric alcohols, saccharides, polymer compounds, amino acids, animal and plant extracts, inorganic compounds, fragrances, and preservatives. In addition, you may use each arbitrary component individually or in combination of 2 or more types, respectively.

(Form)
[A] The stock solution may be liquid. When the viscosity of the liquid [A] stock solution is measured using a B-type viscometer (temperature: 25 ° C., rotor: appropriately set according to viscosity, rotor rotational speed: 60 rpm), 60 seconds from the start of viscosity measurement The value after the lapse is preferably 10 mPa · s or more and 1,000 mPa · s or less, more preferably 20 mPa · s or more and 500 mPa · s or less, and further preferably 30 mPa · s or more and 400 mPa · s or less.

(PH)
[A] The pH of the stock solution should be weakly acidic. By keeping the pH weakly acidic, it is possible to suppress the carbon dioxide from becoming carbonate and enhance the blood circulation promoting effect, and the foaming property and the discharge property are deteriorated due to the increase in viscosity accompanying the decrease in pH. Can be suppressed. [A] The pH of the stock solution is preferably 4.0 or more and 6.8 or less, and more preferably 5.0 or more and 6.5 or less.

[[B] propellant]
[B] The propellant preferably contains carbon dioxide. [B] Since the propellant contains carbon dioxide, it has a blood circulation promoting action on the skin. [B] The propellant may contain components other than carbon dioxide as long as the effects of the present invention are not impaired.

  Examples of components other than carbon dioxide include propane, n-butane, i-butane, and liquefied petroleum gas (hereinafter, also referred to as “LPG”), a mixture thereof, dimethyl ether, and a mixture containing the same. A certain liquefied gas, nitrogen, nitrous oxide, compressed gas such as air, and the like can be mentioned. Of these, liquefied petroleum gas is preferred.

  The mass ratio of [A] stock solution and [B] propellant is preferably 70:30 to 99: 1, more preferably 80:20 to 98: 2, more preferably 90:10 from the viewpoint of efficiently forming bubbles. ~ 96: 4 is more preferred.

[Pressure vessel]
The pressure vessel is made of metal and does not have an inner bag. Examples of the metal used to form the pressure vessel include aluminum, aluminum alloy, tinplate, and steel. Further, a resin layer may be laminated on the inner surface of the pressure vessel. As described above, the foamable aerosol product [A] has a low chlorine ion concentration in the stock solution and has a reduced corrosiveness. Therefore, corrosion can be prevented without having an inner bag.

<Method for producing foamable aerosol product>
The foamable aerosol product can be produced by filling the pressure-resistant container with [A] stock solution and [B] propellant.

EXAMPLES Hereinafter, although this invention is demonstrated concretely based on an Example, this invention is not limited to these Examples. The measurement method of physical property values is shown below.
[viscosity]
Measurement was performed under the following measurement conditions using a Tokimec B-type viscometer.
Measurement temperature: 25 ° C
Rotor: Set appropriately according to viscosity Rotor rotation speed: 60rpm
Viscosity reading: 60 seconds after the start of measurement

<[A] Preparation of stock solution>
[A] Each component used for blending with water for preparation of the stock solution and the blending amount in the [A] stock solution are shown below. In addition, "-" in Table 1, Table 3, and Table 5 shows having not mix | blended the applicable component. Moreover, the dosage form and viscosity of each prepared stock solution are shown together in each table.

(Anionic surfactant)
Polyoxyethylene lauryl ether sodium acetate Polyoxyethylene sulfosuccinate lauryl disodium cocoyl glutamate Na
Lauroyl aspartate Na
(Cationic polymer)
Cationized cellulose N, N-dimethylaminoethyl diethyl methacrylate methacrylate / N, N-dimethylacrylamide / poly (ethylene glycol) dimethacrylate copolymer (amphoteric surfactant)
Isostearamidopropyl betaine Lauramide propyl betaine (nonionic surfactant)
Polyglyceryl monolaurate Polyoxypropylene (1) Palm oil fatty acid monoisopropanolamide (other ingredients)
Polyoxyethylene dioleic acid methyl glucoside Polyethylene glycol 1540
l-Menthol 1,3-butylene glycol absolute ethanol citric acid fragrance

<Example (1)>
Based on the blending amounts shown in Table 1, each component was mixed with water to prepare a stock solution [A]. And each stock solution and [B] propellant which consists of LPG and a carbon dioxide were filled in the pressure-resistant container made from aluminum with the compounding quantity shown in Table 2, respectively, and the foamable aerosol product of each Example was obtained.

Using the foamable aerosol product of each of the above examples, [A] undiluted solution was sprayed (spraying pressure at 25 ° C .: 0.65 MPa), and by three specialized panelists, foaming (visual observation of foaming after being discharged into the hand) Evaluation), foam persistence (visual evaluation of the time during which foam can be maintained after being discharged to the hand) and foam elasticity (tactile evaluation of resilience and elasticity when gripped after being discharged to the hand) according to the following criteria . The evaluation results are shown in Table 2. The evaluation results in Table 2 indicate relative evaluations with respect to Example 2 (displayed as “reference” in Table 2).
A: Very good (3 out of 3 are good)
○: Good (2 out of 3 are good)
Δ: Bad (2 out of 3 are bad)
×: Very bad (3 out of 3 people are bad)

  As can be seen from Table 2, an effervescent aerosol product (Example 1a) formulated with sodium polyoxyethylene lauryl ether acetate and disodium polyoxyethylene sulfosuccinate as anionic surfactants was sodium cocoyl glutamate and lauroyl aspartic acid. Compared with the compound containing Na (Example 1b), the foaming property, foam persistence and foam elasticity were very good.

<Example (2)>
Based on the blending amount shown in Table 3, each component was mixed with water to prepare a stock solution [A]. And each stock solution and [B] propellant which consists of LPG and a carbon dioxide were filled in the pressure-resistant container made from aluminum with the compounding quantity shown in Table 4, respectively, and the foamable aerosol product of each Example was obtained.

[A] The stock solution was sprayed using the foamable aerosol product of each of the above Examples (injection pressure at 25 ° C .: 0.65 MPa), and the foaming property was similar to that of the above Example (1) by three specialized panelists. The foam durability and foam elasticity were subjected to sensory evaluation according to the following criteria. The evaluation results are shown in Table 4. The evaluation results in Table 4 are relative evaluation results in Example (2).
A: Very good (3 out of 3 are good)
○: Good (2 out of 3 are good)
Δ: Bad (2 out of 3 are bad)
×: Very bad (3 out of 3 people are bad)

  As can be seen from Tables 3 and 4, those without the amphoteric surfactant have low viscosity (contrast between Example 2c and Examples 2d and 2e), and as a result, foamability is good.

<Example (3)>
Based on the blending amounts shown in Table 5, each component was mixed with water to prepare a stock solution [A]. And each stock solution and [B] propellant which consists of LPG and a carbon dioxide were filled with the pressure-resistant container made from aluminum with the compounding quantity shown in Table 6, respectively, and the foamable aerosol product of each Example was obtained.

[A] The stock solution was sprayed onto the hair (spraying pressure at 25 ° C .: 0.65 MPa) using the foamable aerosol product of each of the above examples, treated with a treatment containing a cationic surfactant, and dried. Later, three professional panelists gave foam quality (tactile evaluation of the fineness and lightness of the foam when it was grasped after being ejected to the hand), and a sense of volume (finger when passing the hand from the root toward the hair tip) The lightness of the street and the tactile sensation of slipperiness) and the softness of the hair (evaluation of the touch between the middle of the hair and the softness when grasping the fingertip) and sensory evaluation were performed according to the following criteria. The evaluation results are shown in Table 6. The evaluation results in Table 6 are relative evaluation results in Example (3).
A: Very good (3 out of 3 are good)
○: Good (2 out of 3 are good)
Δ: Bad (2 out of 3 are bad)
×: Very bad (3 out of 3 people are bad)

  As can be seen from Tables 5 and 6, as the anionic surfactant, the content of disodium polyoxyethylene sulfosuccinate lauryl is higher than the content of sodium polyoxyethylene lauryl ether acetate. And the softness of the hair is good.

  In addition, the evaluation result of the above-mentioned Example (1)-(3) is a relative thing, respectively, and does not show good or bad in actual use.

<[A] Evaluation of chloride ion concentration in stock solution>
[Chloride ion concentration]
The chloride ion concentration in the stock solution [A] in the foamable aerosol product of each example was analyzed using a Dionex “ICS-2000” equipped with a Dionex anion exchange column “IonPacAS18”. The example was also 500 ppm by mass or less. Table 7 shows the relationship between the nitrogen content of the cationic polymer and the chloride ion concentration of the 1% by weight aqueous solution of the cationic polymer.

  As can be seen from Table 7, as the nitrogen content decreases, the chloride ion concentration decreases. This is achieved by selecting a cationic polymer with a low nitrogen content and setting the amount of the cationic polymer to keep the chloride ion concentration of the [A] stock solution low (less than 500 ppm by mass). It reveals what can be done.

  The present invention is an effervescent aerosol product capable of preventing corrosion of a metal pressure-resistant container without having an inner bag by suppressing chloride ions while maintaining the finger-wiping property by the action of a cationic polymer. Can be provided.

Claims (7)

[A] a stock solution containing an anionic surfactant and a cationic polymer, and [B] a foamable aerosol product in which a pressure-resistant container is filled,
The chloride ion concentration of the above [A] stock solution is 500 ppm by mass or less,
A foamable aerosol product, wherein the pressure vessel is made of metal and does not have an inner bag.   The foamable aerosol product according to claim 1 used as a shampoo.   The foamable aerosol product according to claim 1 or 2, wherein the cationic polymer has a nitrogen content of 2.0 mass% or less.   The foamable aerosol according to claim 1, 2 or 3, wherein [A] the stock solution further contains an amphoteric surfactant, and the content of the amphoteric surfactant in [A] stock solution is 3% by mass or less. Product.   [B] The foamable aerosol product according to any one of claims 1 to 4, wherein the propellant contains carbon dioxide.   The foamable aerosol product according to any one of claims 1 to 5, wherein the anionic surfactant comprises polyoxyethylene lauryl ether acetate and polyoxyethylene sulfosuccinate lauryl salt.   The foamable aerosol product according to claim 6, wherein a mass ratio of the polyoxyethylene sulfosuccinic acid lauryl salt to the polyoxyethylene lauryl ether acetate is 0.5 or more and 3.0 or less.