JP2006342119A - Aerosol composition for foaming - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aerosol composition for foaming, having good ejection property and foaming property, and giving good foam stability without using an oily component and a metal soap in the stock liquid. <P>SOLUTION: The aerosol composition for foaming is composed of a stock liquid containing 0.05-2.0 mass% polyethylene glycol having a polymerization degree of 10,000-150,000 and a propellent. The stock liquid of the aerosol composition preferably contains 0.01-0.5 mass% thickening agent, and the thickening agent is preferably one or more substances selected from carboxyvinyl polymer, xanthan gum and ethylcellulose. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an aerosol composition for foam formation.

  A certain type of aerosol composition is known which is composed of a stock solution containing an active ingredient and the like and a propellant to form a foam-like discharge.

  Conventionally, in foam forming aerosol compositions, in order to increase the time it takes for the discharged foam to disappear and disappear, an oily component such as fatty acid or a metal soap such as fatty acid soap must be added to the stock solution. Therefore, it was difficult to obtain good foam stability for stably maintaining the shape of the foam formed as a discharge for a long time without containing these components in the stock solution.

Moreover, as a certain kind of aerosol composition for foam formation, it is hair cosmetics, contains polyethylene glycol having a polymerization degree of 100,000 to 200,000 in the stock solution, and has a spinnability as a feeling of use when applied to hair. Have been proposed (see, for example, Patent Document 1).
However, in this foam-forming aerosol composition, since the stock solution has a very high spinnability, it is advantageous in the manufacturing process for handling the stock solution, such as the step of preparing the stock solution and the step of filling the stock solution in a pressure resistant container. Time is required, and there is a problem in that good discharge properties and foam-forming properties cannot be obtained.

JP 2003-26545 A

  The present invention has been made on the basis of the circumstances as described above, and the object thereof is good without having an oily component and a metal soap in the stock solution as well as having good dischargeability and foam-forming property. An object of the present invention is to provide a foam-forming aerosol composition capable of obtaining a stable foam stability.

  The aerosol composition for foam formation of the present invention comprises a stock solution containing 0.05 to 2.0% by mass of polyethylene glycol having a polymerization degree of 10,000 to 150,000, and a propellant.

In the foam forming aerosol composition of the present invention, the stock solution preferably contains 0.01 to 0.5% by mass of a thickener.
In such a foam-forming aerosol composition, the thickener is preferably at least one of carboxyvinyl polymer, xanthan gum and ethylcellulose.

  In the foam forming aerosol composition of the present invention, the stock solution preferably has a viscosity of 10 to 2000 mPa · s at a temperature of 20 ° C.

According to the foam forming aerosol composition of the present invention, since the stock solution contains polyethylene glycol having a specific degree of polymerization at a specific ratio, an appropriate viscosity is obtained in the stock solution. Foam-forming properties can be obtained, and good foam stability can be obtained without containing an oily component and a metal soap.
In addition, in the foam forming aerosol composition of the present invention, the foam formed is highly viscous.

  Furthermore, in the aerosol composition for foam formation of the present invention, by including a thickener at a specific ratio in the stock solution, it is possible to obtain even more excellent discharge properties, foam formation properties and foam stability.

The foam forming aerosol composition of the present invention is an aerosol composition (hereinafter also referred to as “specific aerosol composition”) composed of a stock solution containing polyethylene glycol as essential components and a propellant. is there.
The stock solution may contain other additive components as necessary.
Below, the component which comprises a specific aerosol composition is demonstrated.

<Undiluted solution>
(Polyethylene glycol)
As the polyethylene glycol as an essential component of the stock solution, those having a polymerization degree of 10,000 to 150,000, preferably 60000 to 110000, particularly preferably 90000 to 110000 are used.
In particular, by using a polyethylene glycol having a polymerization degree of 90000 to 110000, even higher foam stability can be obtained.

  Specifically, as polyethylene glycol, those commercially available as “Alcox E-100”, “Arcox E-240” (manufactured by Meisei Chemical Co., Ltd.) can be suitably used. Among them, “Alcox E-240” is particularly preferable.

The content of polyethylene glycol is 0.05 to 2.0% by mass in the stock solution, preferably 0.1 to 0.3% by mass, and particularly preferably 0.2% by mass.
When the content ratio of polyethylene glycol is less than 0.05% by mass, stability and viscosity cannot be obtained in the formed foam, and due to this, the foam is deformed by a good external force. The shape recoverability (elasticity) cannot be obtained. On the other hand, when the content ratio of polyethylene glycol exceeds 2.0% by mass, good dischargeability and foam-forming property cannot be obtained, and a long time is required for the manufacturing process for handling the stock solution.

(Other additive components)
In the stock solution constituting the specific aerosol composition, various additive components may be contained depending on the purpose and application of the specific aerosol composition.
Specific examples of other additive components include, for example, thickeners, alcohols such as lower alcohols and polyhydric alcohols, surfactants, fragrances, wax components, resin components such as hair set polymers, silicones, esters , PH adjuster, hair care beauty ingredients, skin care beauty ingredients, film forming agents, UV absorbers, antiseptics, antioxidants, dyes, UV scattering agents, emollients, emulsifiers, solubilizers, anti-inflammatory agents, plants Although an extract, an emollient, a disinfectant, a cleaning agent and the like can be mentioned, it is preferable that a thickener is contained in a stock solution of a specific aerosol composition.

  As the thickener, high molecular compounds such as polysaccharides such as xanthan gum, cellulose derivatives such as ethyl cellulose, hydroxyalkyl cellulose, carboxymethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, methyl cellulose, and carboxyvinyl polymer can be used. It is preferable to use at least one of ethylcelluloses consisting of carboxyvinyl polymer, xanthan gum, hydroxyalkyl cellulose and ethyl alcohol.

The content of the thickener is preferably 0.01 to 0.5% by mass, particularly preferably 0.02% by mass in the stock solution.
By making the content of the thickener 0.01% by mass or more and less than 0.5% by mass, it is possible to obtain more excellent ejection properties, foam-forming properties and foam stability. When the content ratio is too small, excellent stability and consistency cannot be obtained in the foam formed, and due to this, the foam has good shape recovery from deformation caused by external force ( (Elasticity) may not be obtained. On the other hand, if the content of the thickener is excessive, good ejection properties and foam-forming properties may not be obtained.

As water, it is usually preferable to use purified water or ion-exchanged water.
The water content is preferably 50 to 90% by mass in the stock solution.

As the surfactant, a nonionic surfactant, an anionic surfactant, a cationic surfactant, or an amphoteric surfactant can be used.
Surfactant has the effect | action which improves the foam formation of the specific aerosol composition obtained, and it is preferable that the content rate is 0.1-10.0 mass% in stock solution.

  The stock solution preferably has a viscosity at 20 ° C. of 10 to 2000 mPa · s, particularly preferably 20 to 1000 mPa · s, and further preferably 30 to 500 mPa · s. When the viscosity of the stock solution is less than 10 mPa · s, sufficient foam stability cannot be obtained, and the formed foam may not be viscous. When the viscosity exceeds 2000 mPa · s, the stock solution itself is extremely high in the spinnability, and the fluidity is reduced, so that sufficient dischargeability cannot be obtained and a good foam can be formed. There is a risk that it will not be possible.

  The components constituting the above stock solution are mixed under appropriate conditions to prepare a stock solution, and this stock solution is filled into a pressure-resistant container having an injection valve together with a propellant described later, thereby obtaining an aerosol product. .

<Propellant>
A liquefied gas is used as a propellant for a specific aerosol composition, and a liquefied gas usually used for this purpose can be used as it is, but it is particularly preferable to use liquefied petroleum gas (LPG).
The proportion of the propellant is usually 5 to 30 parts by mass, preferably 5 to 15 parts by mass with respect to 100 parts by mass of the stock solution.
When the proportion of the propellant is excessive, the amount of the undiluted solution that is ejected relative to the total amount of ejection is relatively small, so the amount of adhesion to the application site is small, and there is a possibility that it cannot be injected into a foam. is there. On the other hand, when the ratio of the propellant is too small, there is a possibility that it cannot be injected into a foam shape.

According to a specific aerosol composition, since the stock solution contains polyethylene glycol having a specific degree of polymerization at a specific ratio, the stock solution has an appropriate viscosity, so that good discharge properties and foam formation are achieved. In addition, the foam can be obtained with good foam stability without containing an oily component and a metal soap, and the foam formed is highly viscous.
This specific aerosol composition can obtain good foam stability without containing an oily component and a metal soap in the stock solution, but when the stock solution contains an oily component or a metal soap as other components In addition, more excellent foam stability can be obtained.

  Further, in this specific aerosol composition, by including a thickener at a specific ratio as a component constituting the stock solution, it is possible to obtain even more excellent discharge properties, foam forming properties and foam stability. .

  And since the foam which is formed in the specific aerosol composition has stability and viscosity, the liquid component holding | maintenance which hold | maintains the component which comprises stock solutions, such as water and a fragrance | flavor, is carried in this foam, for example Properties such as styling properties, adhesion to the application site, and shape recovery from deformation due to external forces (elasticity). , Shampoos, conditioners, hair protection products such as hair protectants, permanents, hair color agents, facial cleansing foams, cleansing foams, shaving foams, after shaving foams, foundation foams, skin protection foams, moisturizing foams, glitter foams, sunscreen foams, Pack, hair remover, hand soap Body soap, perfume foam, body deodorant foam, foot deodorant foam, pest repellent foam, cooling foam, toothpaste foam and other skin care products, fragrance, bathing agent, cockroach scavenger, cleaner, toilet deodorant, There is a possibility that it can be used as a household product such as a deodorant for garbage, a fire extinguisher, a polish, and an insect trapping foam.

  Examples of the present invention will be described below, but the present invention is not limited thereto.

[Examples 1 to 10 and Comparative Examples 1 to 4]
According to the formulation shown in Table 1 and Table 2, each component was mixed to prepare a stock solution, and this stock solution was filled in a pressure-resistant container together with a propellant made of liquefied petroleum gas (LPG) to produce an aerosol product. .
Here, Comparative Example 1 is an example when the content ratio of polyethylene glycol in the stock solution is excessive, and Comparative Example 2 is an example when the content rate of polyethylene glycol in the stock solution is too small. Comparative Example 3 Is an example in which polyethylene glycol is not contained in the stock solution and an oil component is contained, and Comparative Example 4 is a case in which polyethylene glycol is not contained in the stock solution and metal soap is contained. It is an example.

<Evaluation test of aerosol composition>
About each of the prepared aerosol composition filled in the pressure-resistant container which concerns on the aerosol product produced in said Examples 1-10 and Comparative Examples 1-4, discharge property, foam formation property by the following method, Foam stability and foam consistency were evaluated. The results are shown in Tables 1 and 2.

Here, the evaluation of the discharge property is performed by immersing the aerosol product formed by each of the examples and comparative examples in a thermostat set at 25 ° C. for 30 minutes, and then discharging the contents of each aerosol product for 10 seconds. The amount of the discharged material obtained was measured, and the amount of the discharged material was 12 g or more, and water 84% by mass, ethanol 10% by mass, resin component (anionic acrylic resin “plus size L-6330”, Aerosol composition comprising 90 parts by mass of a stock solution consisting of 5% by mass and 1% by mass of a surfactant (nonionic surfactant “BC-20TX”, manufactured by Nikko Chemicals) and 10 parts by mass of a propellant. After the aerosol product formed by the above is immersed in a thermostat set at 25 ° C. for 30 minutes, the content of the aerosol product is discharged for 10 seconds and discharged for 10 seconds. “◎”, when the discharge rate is 80% or more when the amount of the output is 15 g as a reference (100%), “◎”, the amount of the discharge is less than 12 g and 9 g or more, In addition, “◯” indicates that the discharge rate is less than 80% and 60% or more, and “◯” indicates that the discharge rate is less than 9 g and the discharge rate is less than 60%. “×”.
Evaluation of foam formation was obtained by immersing the aerosol products formed in each of the examples and comparative examples in a thermostat set at 25 ° C. for 30 minutes, and then discharging 5 g of the contents of each aerosol product. The presence or absence of foam formation in the discharged product was visually confirmed, and the case where the foam was formed was evaluated as “◯”, and the case where the foam was not formed was evaluated as “x”.
The foam stability was evaluated by immersing the aerosol products formed in each of the examples and comparative examples in a thermostatic bath set at 25 ° C. for 30 minutes, and then displacing the contents of each aerosol product in a graduated cylinder having a volume of 20 ml. The amount of foam remaining after the foam was discharged from the upper end (hereinafter referred to as “the height of the foam after 5 minutes”). ), And the defoaming rate is calculated based on the following formula (1). If the defoaming rate is 30% or less, “◎”, exceeding 30% and exceeding 51% The case of less than “○” was evaluated as “good”, and the case of 51% or more was evaluated as “x” as insufficient.
In addition, the evaluation of foam viscosity was performed using a handy compression tester “KES-G5” (manufactured by Kato Tech Co., Ltd.), and the aerosol products formed in each of the examples and comparative examples were set to 25 ° C. After immersing in the bath for 30 minutes, the contents of each aerosol product were discharged into a 40 ml capacity tray of the tester to fill the pan completely, and a load cell provided above the saucer was incorporated. The plunger is moved up and down at a speed of 0.05 cm / g and the displacement amount is 20 mm to compress and pull the discharged material, so that the work amount when the plunger moves upward (the plunger pulls on the discharged material) Load), that is, the peak value of the curve relating to the upward movement in the obtained compression displacement-compression load curve (hereinafter referred to as “viscosity value”). )), When the viscosity value is 2.0 g or more, “◎” is considered very good, and when it is less than 2.0 g and 1.0 g or more, The case where “◯” was less than 1.0 g was evaluated as “x” as insufficient.

  Moreover, about the foam formed by each of the aerosol composition which concerns on Examples 1-10 and Comparative Examples 1-4 (a discharge thing when a foam is not formed), shape recovery property (elasticity) is evaluated by the following method. did. The results are shown in Tables 1 and 2.

  Here, the shape recoverability was evaluated by using a handy compression tester “KES-G5” (manufactured by Kato Tech Co., Ltd.), and the aerosol product formed by each of Examples and Comparative Examples was set to 25 ° C. After being soaked for 30 minutes, the contents of each aerosol product are discharged into a 40-ml saucer of the tester to fill the saucer completely, and a plan with a built-in load cell is provided above this saucer. The amount of work when the plunger moves upward and downward is measured by moving the jar up and down at a speed of 0.05 cm / g and a displacement of 20 mm to compress and pull the discharged material. Calculating the compression resilience value, which is the ratio of the work amount related to the upward movement to the work amount, and the case where the compression resilience value is 80% or more is very good "◎" as is, "○" and when less than 80% or 50% or more as being good, was evaluated as "×" and is less than 50% as insufficient.

In Tables 1 and 2, “Alcox E-100” is a commercially available polyethylene glycol having a polymerization degree of 60000-70000, and “Alcox E-240”. "Is a commercially available polyethylene glycol manufactured by Meisei Chemical Industry Co., Ltd., having a polymerization degree of 90000-110,000.
Further, as xanthan gum, those manufactured by Dainippon Pharmaceutical Co., Ltd. are used, as ethylcellulose, hydroxyethyl cellulose “SE600” manufactured by Daicel Chemical Industries, Ltd., and as the surfactant, nonionic surfactant manufactured by Nikko Chemicals Co., Ltd. The agent “BC-20TX” is used, the oily component is myristic acid “Lunac MY-98” manufactured by Kao Corporation, and the metal soap is calcium soap “Calcium stearate” manufactured by Nippon Oil & Fats Co., Ltd. As an ingredient, an anionic acrylic resin “Purasize L-6330” manufactured by Kyoyo Chemical Co., Ltd. was used.

As is clear from Tables 1 and 2, the aerosol compositions according to Examples 1 to 10 have good ejection properties and good foams, and the foams formed have stringiness. Moreover, it was confirmed that the foam shape can be maintained for a long time.
On the other hand, the aerosol composition according to Comparative Example 1 is confirmed to have a good dischargeability and no foam formation because the polyethylene glycol content in the stock solution is excessive. In the aerosol composition according to Example 2, since the content ratio of polyethylene glycol in the stock solution is too small, it is confirmed that the foam formed has no viscosity, and according to Comparative Example 3. In the aerosol composition, although the oily component is contained in the stock solution, but the polyethylene glycol is not contained, it is confirmed that the foam formed has no viscosity, and Comparative Example 4 In the aerosol composition according to the present invention, although the stock solution contains metal soap but does not contain polyethylene glycol, the foam formed has a viscosity. It was confirmed that the casting.

  Moreover, especially the aerosol composition which concerns on Examples 1-4 and 9-10 is favorable with the discharge property excellent compared with the aerosol composition which concerns on Example 5 whose content rate of the thickener in an undiluted solution is excessive. Compared to the aerosol composition according to Example 6 in which the foam stability is also obtained, and the foam formed has excellent viscosity and shape recovery, and the content of the thickener is too small. In comparison with the aerosol composition according to Example 8, which has excellent foam stability, the foam formed has excellent viscosity and shape recoverability, and the viscosity of the stock solution is excessive. In addition to excellent ejection stability, good foam stability is also obtained, and excellent foam stability is obtained as compared with the aerosol composition according to Example 7 in which the viscosity of the stock solution is too low. Foam has excellent viscosity The person has a called shape recovery was observed.

  Moreover, since the aerosol composition which concerns on Examples 9-10 contains an oil-based component or a metal soap in the undiluted | stock solution, it is a foam more excellent compared with the aerosol composition which concerns on Examples 1-4. It was confirmed that stability was obtained.

Claims (4)

  A foam-forming aerosol composition comprising a stock solution containing 0.05 to 2.0% by mass of polyethylene glycol having a degree of polymerization of 10,000 to 150,000 and a propellant.   The foam composition aerosol composition according to claim 1, wherein the stock solution contains 0.01 to 0.5 mass% thickener.   The foam forming aerosol composition according to claim 2, wherein the thickening agent is at least one of carboxyvinyl polymer, xanthan gum and ethyl cellulose. The aerosol composition for foam formation according to any one of claims 1 to 3, wherein the stock solution has a viscosity of 10 to 2000 mPa · s at a temperature of 20 ° C.