JP2003002375A - Aerosol product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a means for reducing the volume of an aerosol container of an aerosol product while maintaining and improving the frequency of usage of the product, or a means for enhancing the limit of the content of a setting component per unit volume. SOLUTION: The aerosol container is filled with at least a stock solution including a solid component and a propellant, and the aerosol product satisfies the following requirements: (1) the content of the solid component is 5-20 mass % based on the stock solution and the propellant; (2) the content of a solvent component is 50-70 mass % based on the stock solution and the propellant.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an aerosol product. More specifically, the present invention relates to an aerosol product that can be made compact.

[0002]

2. Description of the Related Art Aerosol products, which are products that use gas pressure to discharge liquids from pressure-resistant containers, have good functionality as hair spray products such as hair sprays and hair styling foams. Widely used from.

Taking the case of using an aerosol product as a hair setting agent, the content to be filled in an aerosol container is approximately 5% or less of a solid component for hair setting and 50
% Solvent component such as water and alcohol, and propellant (remainder), and the injection amount for 10 seconds is set to 5 g or more in order to obtain a sufficient setting force. That is, if it is attempted to include 5% or more of the solid component for hair setting in the above-mentioned contents, the viscosity of the undiluted solution will increase, and the particle size containing the solid component will exceed 30 μm. In the above, clogging is likely to occur, and there is a strong tendency to cause problems with fog quality and usability.

[0004]

Under the circumstances described above, the content of the fixed component per unit volume of the above content naturally has an upper limit, and at present, an aerosol product which can withstand a certain number of times of use is inevitably inevitable. There is no choice but to increase the volume of the aerosol container.

However, from the viewpoint of resource saving and energy saving, the material cost and the transportation cost are extra, which is not so preferable in terms of environmental protection. Further, if the volume of the aerosol container can be reduced without reducing the number of times of use, it is possible to improve portability for the user. Further, it becomes possible to efficiently utilize the storage space at home and the storefront shelf space at the sales store.

[0006] Therefore, the problem to be solved by the present invention is to provide a means for reducing the volume of an aerosol container in an aerosol product while maintaining and improving the number of times the product is used, in other words, a unit volume of the above contents. It is to provide a means for expanding the upper limit of the content of the fixed component per unit.

[0007]

Means for Solving the Problems The present inventor has deeply studied the balance between the injection amount per unit time in an aerosol product and the contents of the solid component and the solvent component in the stock solution, and as a result, Finally, we came up with the desired conditions.

That is, the present invention provides an aerosol container,
Provided is an aerosol product (hereinafter, also referred to as the present aerosol product), which is filled with at least a stock solution containing a solid component and a propellant and which satisfies the following conditions.

The content of the solid component in the stock solution and the propellant is 5 to 20% by mass. The content of the solvent component in the stock solution and the propellant is 50
Is about 70% by mass. In the aerosol product of the present invention, in addition to these conditions, it is preferable that the aerosol container is equipped with a valve satisfying the following conditions'- '.

The stem hole diameter is 0.3 to 0.4 mm. 'Housing hole diameter / Weber tap hole diameter is 1.5
Greater than 'Housing hole diameter is 1.0 mm or less.

In this way, the injection amount of the aerosol for 10 seconds is about 1.5 to 4.0 g, and the injection particles at a distance of 15 cm from the injection port of the aerosol container (solids contained in the undiluted solution in the aerosol product). The average particle size of the particles containing the component) can be easily set to 10 to 30 μm, and the aerosol product very useful for use as an aerosol product for a hair set that can solve the above problems (the present aerosol product) ) Is provided (the above-mentioned value representing the average particle diameter of the sprayed particles is a specific numerical value in the above condition "distance of 15 cm from the spray port of the aerosol container", and if other conditions are used, For example, if the distance from the injection port for measuring the average particle size is less than 15 cm, the average particle size tends to increase, and conversely Setting beyond 5 cm, average particle size is observed tends to decrease).

Here, for convenience of the following description, the terms and the like used in the present invention will be confirmed as a precaution. As described above, the "aerosol product" is a product that discharges liquid or the like from the pressure resistant container by utilizing gas pressure, and basically has a configuration shown in FIG.

FIG. 1 is a vertical sectional view of a general aerosol product. The aerosol product 10 comprises an aerosol container (pressure resistant container) 11 and a liquid phase 12 consisting of a stock solution and a propellant.
And a gas phase 13 composed of a vaporized propellant or the like is enclosed,
At the opening 111 of the aerosol container 11, the valve 1
4 is attached and fixed.

FIG. 2 is an exploded view of the valve 14. In FIG. 2, the valve 14 includes a dip tube 141, a housing 142, a spring 143, a stem 144, gaskets 1451 and 1452, a mounting cup 146 and a button 147. The housing hole 1421 of the housing 142 is fitted and fixed in the dip tube 141, and the spring 143 is arranged in the housing 142. The stem 144 has a through hole 145 formed in the center of the horizontal plane of the gasket 1451 and the mounting cup 146.
1a and 146a (the diameter of these through holes is larger than the diameter of the upper portion 1441 of the stem 144 and smaller than the maximum diameter of the lower portion 1442 thereof), and the button 14
7, the upper part 1441 of the stem is fitted and fixed in the fitting port 1471 of the lower part 144 of the stem.
The tip of the second member is arranged so as to press the spring 143 arranged in the housing 142 from above.
The gasket 1451 is locked on the upper portion of the housing 142, and the gasket 1452 is locked on the opening 111 of the aerosol container 11, so that the valve 14 can be mounted on the aerosol container 11 while maintaining a desired structure. Has been done.

The stem hole diameter is a stem hole 1443 which is a lateral hole provided in the stem 144 (at least the stem hole 1443 is the fitting opening 1 of the button 147).
471), and is also provided so as to be opened toward the inside of the housing 142 when the button 147 is pushed in). When the aerosol product is not used, the stem 144 is pushed up by the pushing force of the spring 143 toward the button 147, and the opening of the stem hole 1443 on the housing 142 side is located outside the housing 142. The liquid phase 12 in the aerosol container 11 is never jetted to the outside. On the other hand, when the aerosol product is used, the button 147 is pushed in, and the opening of the stem hole 1443 on the side of the housing 142 opens toward the inside of the housing 142 as described above, and the aerosol container passes through the opening. The liquid phase in 11 flows into the stem hole 1443 due to the pressure of the propellant,
Through this stem hole, it spouts outward from the spout 1472 provided in the button 147. In this way, the stem hole becomes an important element for defining the flow rate (volume) per unit time when the liquid phase is ejected to the outside. Is smaller, the flow rate of the liquid phase per unit time is smaller,
If it is large, the same flow rate of the liquid phase will be large.

The Weber tapped hole is the housing 14
It is a lateral hole provided in No. 2 (not shown). The Weber tap hole is normally in contact with the gas phase in the aerosol product, and is a mechanism for mixing the gas in the liquid phase with the gas in the housing 142. If the diameter of such a Weber tap hole is large, the proportion of the vapor phase in the ejection product of the aerosol product increases, and by adjusting the hole diameter of the Weber tap hole, the ejection amount of the liquid phase component per unit time can be adjusted. You can The housing hole diameter is the hole diameter of the housing hole 1421. When the housing hole diameter is large, the inflow amount of the liquid phase per unit time in the housing is large, and when it is small, the inflow amount is small.

Therefore, the housing hole diameter / Weber tap hole diameter is a useful index for defining a factor determined by the liquid phase / vapor phase ratio of the ejected product of the aerosol product. Specifically, when the housing hole diameter / Weber tap hole diameter is increased, the ejected matter is in a liquid phase dominant state, the ejected particles are large, and the injection amount of the liquid phase per unit time tends to increase. On the other hand, when this ratio is small, the ejected substance tends to be in the gas phase dominant state, the ejected particles are fine, and the injection amount of the liquid phase per unit time tends to decrease.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. A. Stock solution and propellant of the aerosol product The stock solution and propellant of the aerosol product are characterized by satisfying the following conditions.

The content of the solid component with respect to the undiluted solution and the propellant is 5 to 20% by mass. With solid components, in particular,
A component used as a hair setting agent or the like, which is a solid or semi-solid resin or oil component at room temperature and a mixture thereof, and specifically, for example, polyvinylpyrrolidone, polyvinylpyrrolidone-vinyl acetate copolymer, polyvinylpyrrolidone- Vinyl acetate-vinyl propionate copolymer, polyvinylpyrrolidone-alkylaminoacrylate copolymer, polyvinylpyrrolidone-acrylate-
(Meth) acrylic acid copolymer, polyvinylpyrrolidone-
Polyvinylpyrrolidone-based polymer compounds such as alkylaminoacrylate-vinylcaprolactam copolymers; acidic vinylether-based polymer compounds such as methyl vinyl ether-alkyl maleic anhydride half ester copolymers;
Acidic polyvinyl acetate polymer compounds such as vinyl acetate-crotonic acid copolymer, vinyl acetate-crotonic acid-vinyl neodecanoate copolymer, vinyl acetate-crotonic acid-vinyl propionate copolymer; alkyl acrylate copolymer Combined emulsion, (meth) acrylic acid- (meth) acrylic acid ester copolymer, acrylic acid-acrylic acid alkyl ester-alkylacrylamide copolymer, dialkylaminoethyl (meth) acrylate- (meth) acrylic acid alkyl ester copolymer Combined, hydroxypropyl acrylate-butylaminoethyl methacrylate-acrylic acid octylamide copolymer, acrylic acid octylamide-
Acrylic polymer compounds such as hydroxypropyl acrylate-butylaminoethyl methacrylate copolymers; basic acrylic polymer compounds such as acrylamide / acrylic ester quaternary copolymers; cellulose derivatives such as cationic cellulose derivatives; Examples include chitin / chitosan derivatives such as hydroxypropyl chitosan, carboxymethyl chitin, and carboxymethyl chitosan; resins such as polyvinyl alcohol, plasticizers, solid oils, waxes, silicone rubber, silicone resins, and the like. It is not limited.

As described above, these solid components are blended in the stock solution for the purpose of forming a film on the ejection surface (as described above, used as a hair setting agent, etc.). . In order to improve the film formation efficiency, etc., it is a direct method to increase the content of solid components in the stock solution, but if the content is increased excessively, the viscosity of the stock solution itself will also increase excessively. This causes clogging of the stem and the button, which is contrary to the convenience of use. For this reason, conventionally, the content of the solid component, relative to the stock solution and the propellant,
It is suppressed to less than 5% by mass. In the present invention, the content of the solid component relative to the undiluted solution and the propellant is set to 5 to 20.
Even in terms of mass%, an aerosol product capable of exhibiting good usability without causing clogging or the like is provided by combination with various conditions described below. In this way, by concentrating the solid components in the stock solution,
The product can be made compact by reducing the volume of the aerosol container while maintaining and improving the number of times the product is used. However, the content of the above solid components,
If it exceeds 20 mass% with respect to the stock solution and the propellant, clogging and deterioration of usability tend to be remarkable even if the conditions described below are combined. Further, the content of the solid component in the more preferable stock solution and propellant is generally 5 to 10% by mass based on the stock solution and propellant.

The content of the solvent component in the stock solution and the propellant is 50 to 70% by mass. The solvent component is a component which is a liquid at room temperature and pressure for dissolving / dispersing the above solid components, and includes water, alcohols, etc., and the balance with the solid components to be used (water solubility / It can be freely selected depending on, for example, whether it is water dispersible or not, and the nature of the spray mist of the aerosol product. Examples of alcohols include monohydric alcohols such as ethyl alcohol, denatured ethyl alcohol and isopropyl alcohol; ethylene glycol, propylene glycol, 1,
Examples thereof include polyhydric alcohols such as 3-butylene glycol, glycerin, and sorbitol, but are not limited thereto.

When the content of the above solvent component is less than 50% by mass with respect to the stock solution and the propellant, the concentration of the solid component in the stock solution becomes excessively high, resulting in an excessive increase in viscosity, which may result in buttons and The tendency to cause clogging in the stem becomes stronger. Further, if the content of the solvent component exceeds 70% by mass with respect to the stock solution and the propellant, the amount of remaining injection becomes large, resulting in inefficiency. A particularly suitable range of the content of the solvent component is about 50 to 60 mass% with respect to the undiluted solution and the propellant.

[0023] In addition to the above solid components and solvent components, the stock solution may contain, if necessary, components that can be generally blended with external products such as cosmetics unless the intended effects of the present invention are impaired. It is possible to mix. Specifically, for example, liquid oil, higher fatty acid, higher fatty acid ester, higher alcohol, silicone oil, surfactant, moisturizer, ultraviolet absorber, antioxidant, refreshing agent, dandruff / kayumi agent, antiperspirant ,
Examples thereof include antiseptics, germicidal disinfectants, anti-inflammatory analgesics, animal and plant extracts, and fragrances.

The propellant that can be used in the present aerosol product is not particularly limited as long as it is a propellant that can be generally used in aerosol products. For example, various liquefied petroleum gas, dimethyl ether, a mixture of liquefied petroleum gas and dimethyl ether, and compressed gas. Etc. can be used. Among these, dimethyl ether has good solubility in water and good compatibility with general solid components, and can be suitably selected.

The content of the propellant is about 10 to 45% by mass with respect to the undiluted solution and the propellant.
About 5% by mass is suitable. B. For aerosol containers, valves, etc. of this aerosol product
In this aerosol product, the undiluted solution and the propellant described in A above are used as an aerosol, and the injection amount for 10 seconds is 1.5 to
By setting the amount to 4.0 g, desired effects (no clogging and good usability) can be exhibited.

In order to realize such an injection amount in an aerosol product using the above-mentioned undiluted solution and propellant, a mechanism for realizing this must be provided in an aerosol container, a valve for injection, or the like. Becomes The mechanism is not particularly limited as long as it is appropriate for achieving this purpose, but in a preferred embodiment, the aerosol container is equipped with a valve satisfying the following conditions'- '. It is suitable.

The stem hole diameter is 0.3 to 0.4 mm. If the stem hole diameter is less than 0.3 mm, it will be difficult to make the injection amount per unit time reach 1.5 g / 10 s, and if it exceeds 0.4 mm, the injection amount will be 4 The tendency to exceed 0.0 g / 10s becomes stronger.

The shape of the stem hole is not particularly limited, and the shape of the hole cross section may be circular or polygonal. The above-mentioned stem hole diameter is a value assuming that the shape of the hole cross section is circular, and in the case of other shapes, the stem hole can be designed within the range of the area of this circular cross section. By making the cross section of the hole into a polygonal shape, it is recognized that the clogging of the stem hole due to the contents can be suppressed.

'Housing hole diameter / Weber tap hole diameter is greater than 1.5. When the housing hole diameter / Weber tap hole diameter is 1.5 or less, the gas phase mixing ratio in the ejected substance becomes excessively large, and as a result, an intermittent tendency is observed in the injection of the injection particles, which is preferable. Absent.

The housing hole diameter is not particularly limited, but the upper limit is generally about 4 mm. The lower limit is about 0.3 mm at the current technical level. 'Housing hole diameter is 1.0 mm or less.

When the hole diameter of the housing exceeds 1.0 mm,
The mixing ratio of the liquid phase in the ejected matter becomes excessively large, the ejected particles become rough, and the flammability may become large depending on the type of propellant, which is not preferable.

The lower limit of the housing hole diameter is theoretically not particularly limited, but is 0.3 at the current technical level.
It is about mm. By mounting a valve satisfying such conditions 'to' on the aerosol container, the injection amount per unit of the undiluted solution and the propellant as an aerosol is 1.
It becomes possible to set it to 5 to 4.0 g / 10s. further,
By using the valve satisfying these conditions 'to', the average particle size of the spray particles at a distance of 15 cm from the spray port becomes 10 to 30 μm, and an aerosol product capable of exhibiting desired characteristics can be provided.

In the aerosol product of the present invention having such conditions, it is possible to increase the content of the solid component per unit in the undiluted solution of the aerosol while avoiding clogging and maintaining / improving usability. . In this way, the volume of the aerosol container can be reduced while maintaining and improving the number of times of use and usability of the product, and energy and space can be saved.

The present aerosol product is preferably used as a mist product or a foam product, and conditions such as a stock solution, a propellant, and an aerosol device can be appropriately selected depending on which mode. .

Further, since the present aerosol product is a product which mainly forms a solid component into an aerosol, it is generally used as a product for forming a film of the solid component. Specifically, in the field of cosmetics, it is suitable to use as an aerosol for hair setting, an aerosol for coloring hair, and the like.

[0036]

EXAMPLES The present invention will be described in more detail below with reference to examples. Unless otherwise specified, the compounding amount is% by mass based on the object to be compounded. [Test Example] In order to evaluate the present aerosol product, the present invention products (1.2) and comparative products (1-7) having the following contents, which can be used as cosmetics for hair setting, were prepared.

Undiluted solution / solid component: acrylic resin alkanolamine solution [acrylic acid type copolymer (plus size L-53P: Kyowa Chemical Co., Ltd.): solid component is 50% by mass / total acrylic resin alkanolamine solution (solvent is 99) % denatured ethanol) Convert] solvent component: 99% denatured ethanol, purified water and / or silicone oils (methylphenyl polysiloxane) and AMP (neutralizing agent) propellant: dimethyl ether or liquefied petroleum gas valve: stem hole diameter, the housing hole diameter , Weber tap hole diameter and housing hole diameter / Weber tap hole diameter were specified.

Evaluation 10 seconds Injection amount, average particle size, fog quality, setting force,
The seven items of usability, solubility and clogging were evaluated.

The 10-second injection amount was determined by measuring the decrease in the mass of the aerosol product before and after injection when each aerosol product was injected for 10 seconds.

The average particle diameter was measured from the injection port by using a particle size distribution measuring device (LDSA-3400A: Tohnichi Computer Applications Co., Ltd.) using a laser beam.
It was determined by measuring the average particle size of the spray particles at a place separated by cm.

Regarding the mist quality, the spread of the sprayed mist and the fineness of the mist on the panel of 10 people were A "well spread and good feeling: 2 points", B "spread was normal,
Good or bad: 1 point ”, C“ Almost no spread and feeling is not good: 0 point ”, and a product with a total score of 10 points or more is good (○), 5 ~ 9
Products with 4 points are inferior (△), products with 4 points or less are inferior (x)
And

As for the setting force, in the same panel of 10 people as above, the hair was actually sprayed on the hair for a certain time (uniformly 3 seconds), and the setting force immediately after that and the holding force after 2 hours were A Can be set well and does not change over time: 2 points ", B" hairstyle can be set normally, hairstyle is broken over time: 1 point ", C" when spraying for a fixed time,
Unable to set: 0 points ", a product with a total of 10 points or more is good (○), a product with 5 to 9 points is normal (△), and a product with 4 points or less is inferior. (X)

The usability was determined by actually spraying hair onto a panel of the same 10 persons for a certain period of time (uniformly 3 seconds).
Immediately after that, with regard to the feel when touching the hair and the same feel after 2 hours, A: “Smoothness and pleasant use: 2 points”, B: Stickiness may occur during or after spraying. Yes, but acceptable: 1 point ", C" unusually unusable due to stickiness etc .: 0 point ", and a product with a total score of 10 points or more is good (○), Products with 5 to 9 points were rated as normal (△), and products with 4 points or less as inferior (x).

The solubility was evaluated and judged according to the following criteria by filling the stock solution and the propellant in a transparent pressure-resistant container, storing the mixture at 5 ° C., and visually observing the appearance of the contents in the container. ◯: No abnormality is observed Δ: Some cloudiness, but no precipitate is observed ×: Precipitate is observed

Regarding clogging, after the product (excluding) was sprayed, it was dried at 50 ° C. and sprayed at 5 ° C., and the clogging state was judged when the spraying was repeated 20 times (◯: no abnormality, ×: Cannot spray). Table 1 shows the results of the tests described above.

[0046]

[Table 1]

In both the products of the present invention, the content of the acrylic acid copolymer in the stock solution was larger than the general content of 5% for both 1 and 2, but the injection amount of 10 seconds was also contained in the stock solution. The average particle size of the particles containing the solid component is
It was within the conditions of the present invention, and the evaluations in the tests 1 to 3 were all "good". Therefore, in the product of the present invention, even when an aerosol container having a smaller volume than the conventional general product is used, the number of times of use equal to or more than that of the conventional general product is secured, and the performance of the aerosol product is maintained / improved. It has become clear that it is possible to do.

On the other hand, in Comparative Product 1 (an example in which the amount of acrylic acid copolymer was larger than the condition of the present invention and the amount of solvent component was smaller than the condition of the present invention), the viscosity of the stock solution was The average particle size was increased more than necessary, and as a result, although the setting power was excellent, the mist quality, usability, solubility and clogging were poorly evaluated.

Even in Comparative Product 2 (example in which the amount of the solvent component was smaller than the condition of the present invention), the average particle size of was larger than the condition of the present invention, and the evaluation of usability, solubility and clogging was poor. .

In Comparative Product 3 (example in which the stem hole diameter and the housing hole diameter were made larger than the condition of the present invention), the injection amount for 10 seconds was larger than the condition of the present invention, and the average particle size thereof was also larger than the condition of the present invention. As a result, it became inferior in fog quality and usability.

Comparative product 4 (an example in which the amount of the acrylic acid copolymer is larger than the condition of the present invention and the amount of the solvent component is smaller than the condition of the present invention, and in addition to this, liquefied petroleum as a propellant (Using gas) had an extremely large average particle size, and was inferior in evaluation of mist, solubility and clogging.

Comparative product 5 (example in which housing hole diameter / Weber tap hole diameter was made smaller than the conditions of the present invention) was 1
The 0 second injection amount became smaller than the condition of the present invention, and the average particle size of became larger than the condition of the present invention, and as a result, the mist quality, setting force and clogging were poorly evaluated.

In Comparative Example 6 (an example in which the amount of the acrylic acid copolymer was smaller than the condition of the present invention and the amount of the solvent component was smaller than the condition of the present invention), the injection amount for 10 seconds was the condition of the present invention. , And as a result, the setting power and usability were poor.

[0054]

The present invention provides means for reducing the volume of an aerosol container in an aerosol product while maintaining and improving the number of times the product is used.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a general aerosol product.

FIG. 2 is an exploded view of a valve of an aerosol product.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Taizo Fujiyama             2-2-1 Hayabuchi, Tsuzuki Ward, Yokohama City, Kanagawa Prefecture             Shiseido Research Center (Shin-Yokohama)             Within F term (reference) 3E014 PA01 PB01 PD01 PE02 PE06                 4F033 RA02 RB04 RC04 RC08

Claims (5)

[Claims] 1. An aerosol product in which an undiluted solution containing a solid component and a propellant are filled in at least an aerosol container, which satisfies the following conditions: The content of the solid component in the undiluted solution and the propellant is 5 to 5.
It is 20% by mass. The content of the solvent component in the stock solution and the propellant is 50
Is about 70% by mass. 2. An aerosol product according to claim 1, wherein the aerosol container is equipped with a valve satisfying the following conditions: The stem hole diameter is 0.3 to 0.4 mm. Housing hole diameter / Weber tap hole diameter is greater than 1.5. The housing hole diameter is 1.0 mm or less. 3. The aerosol product according to claim 1, wherein the average particle size of the spray particles at a distance of 15 cm from the spray port of the aerosol container is 10 to 30 μm. 4. The aerosol injection amount for 10 seconds is 1.5 to 10.
An aerosol product according to any one of claims 1 to 3 which is 4.0 g. 5. The aerosol product according to any one of claims 1 to 4, wherein the product form of the aerosol product is an aerosol product for hair setting.