JPWO2019111961A1 - Fixed-quantity injection aerosol products - Google Patents

Abstract

The metering chamber in the metering valve of the aerosol product is made larger so that the entire contents of the metering chamber can be injected to the outside at one time by one injection operation. An aerosol container containing contents composed of an aerosol stock solution and a propellant, a metering injection valve (10) provided at one end of the aerosol container and having a metering chamber (15) inside, and a metering injection valve (10). An aerosol product comprising an injection mechanism connected to a valve stem (12), wherein the metering chamber (15) is formed of at least two chambers, and each chamber is communicated via a communication passage (15t). The undiluted solution contains powder.

Description

The present invention relates to a quantitative injection type aerosol product in which an aerosol stock solution and an propellant are contained inside an aerosol container provided with a metering injection valve having a metering chamber inside.

Conventionally, there are a wide variety of aerosol products provided with a metering injection valve, and examples thereof include those described in the following patent documents.

In the "quantitative injection valve device and the aerosol type injector provided with the metering injection valve device" described in Patent Document 1, it is an object to make it possible to change the size of the metering chamber at low cost.

The configuration is such that a metal valve device main body is provided in a fixed-quantity injection valve device, a tubular stem storage portion is formed in the device main body, and a stem housing portion is formed so as to protrude downward from the center. Store the part. Then, a central hole is formed at the bottom of the stem storage portion, and the lower portion is press-fitted into the metering tank. As a result, the metering tank is attached to the valve device body, and the metering chamber is partitioned. As a result, the contents in the metering chamber can be injected through the stem for each injection operation. When it is desired to change the injection amount for each injection operation, the metering tank can be replaced with a different shape to change the size of the metering chamber.

In the "quantitative injection valve mechanism and the aerosol type product provided with this fixed quantity injection valve mechanism" described in Patent Document 2, the fixed quantity of the fixed quantity injection valve mechanism is used as it is while using the components of the existing valve mechanism as they are. The task is to secure the degree of freedom of the room volume.

The configuration consists of an additional unit including an upper cover body and a lower cover body attached to the outside of the housing. When the stem is pressed downward, the sealing action surface of the stem extension member connected to the lower end of the stem closes the content distribution inlet, forming a metering chamber inside the add-on unit and housing. When the stem is further pressed, the hole (communication lateral hole / orifice) moves downward from the stem rubber, so that the internal passage area of the stem and the metering chamber communicate with each other to release the contents of the metering chamber. When the pressing of the stem is released, the communication state is released and the content distribution inlet is opened, so that the contents of the container body can flow into the quantitative chamber space area from the content distribution entrance.

Conventionally used fixed-quantity injection aerosol products have a problem that the injection amount is about 0.1 to 0.4 mL, the actual feeling of use during use is not sufficient, and the user injects excessively. It was. Therefore, there is a demand for a quantitative injection type aerosol product that can provide a sufficient feeling of use with a considerable amount of injection and can prevent excessive injection. Alternatively, some of the aerosol products are required to inject a predetermined amount of injection amount, for example, an injection amount of 1.0 mL or more at one time, depending on the type of the content thereof.

In order to solve this problem, the applicant has previously proposed an aerosol metering valve in which the content of the metering chamber is increased (Patent Document 3).

The invention described in Patent Document 3 is an aerosol valve provided at a substantially central portion of an upper end mounting cup of an aerosol container, the housing, a valve stem fitted into the housing from the upper end portion, and a lower end portion of the housing. It consists of a tube that sucks up the contents in the container provided in the part, a metering chamber provided in the housing, and an urging member that constantly urges the valve stem upward, and is stored in the metering chamber when not in use. In the aerosol metering valve in which the flow path of the contents is closed and a certain amount of the contents is injected by pushing the valve stem, the metering chamber is located below the urging member. It is arranged and formed in a substantially cylindrical shape having an outer diameter larger than the outer diameter of the housing, and the metering chamber is composed of an inner inner metering chamber and an outer outer metering chamber, and these inner metering chambers and the outer side. The quantification chamber is partitioned by an annular partition wall that hangs downward from the top of the quantification chamber, and both inner quantification chambers and the outer quantification chamber are communicated with each other at the lower end of the annular partition wall.
As described above, by forming the quantification chamber into two chambers, an inner quantification chamber and an outer quantification chamber, it is possible to increase the total internal volume thereof.

Japanese Patent Application Laid-Open No. 2002-264978 Japanese Patent Application Laid-Open No. 2008-207873 Japanese Patent Application Laid-Open No. 2018-034805

In the invention described in Patent Document 3, in the aerosol metering injection valve, a passage through which the contents in the aerosol container flow in and out of the metering chamber is formed at the upper end portion (valve stem side) of the inner metering chamber. There is.
As described above, by configuring the quantification chamber into two chambers, the inside and the outside, a passage for inflow and discharge of the contents into the quantification chamber is provided at the upper end of the inside quantification chamber.

In the invention described in Patent Document 3, the internal volume of the quantification chamber could be made extremely large by the above configuration, but in this prior invention, one phenomenon has been raised as an issue.
That is, although a certain amount of many contents can be injected by one injection operation of pressing the injection mechanism (for example, the pressing button) connected to the valve stem, the injection is temporarily performed in the injection state. A phenomenon in which the injection is stopped or the injection is temporarily interrupted (hereinafter, the temporary stop of the injection is also referred to as “injection failure”) may occur. That is, normally, all the contents in the metering chamber are ejected or sprayed to the outside while the pressing button is pressed to the lowermost end, but this injection state is temporarily stopped or interrupted. In some cases, the phenomenon occurred.

In that case, the injection is restarted by the user shaking or shaking the entire aerosol product, but the user may mistake the suspended state or the stopped state as the injection of the entire amount. However, it does not mean that the desired injection amount has been injected.
Therefore, in a product designed to inject a constant predetermined amount, the above-mentioned injection failure becomes a problem.

Therefore, it is an object of the present invention to increase the internal volume of the metering chamber of the aerosol metering injection valve to inject an injection amount of 0.8 mL or more at one time and to reduce injection defects.
Another object of the present invention is to enable all the contents in the metering chamber to be efficiently discharged from the discharge port of the valve stem.

As a result of diligent studies to solve the above problems, the present inventors have found that by mixing powder with the contents in an aerosol product, injection defects of this injection are reduced, leading to the present invention.

That is, the first object of the present invention is an aerosol container containing contents composed of an aerosol stock solution and a propellant, a metering valve provided at one end of the aerosol container and having a metering chamber inside, and the metering injection. An aerosol product comprising an injection mechanism connected to the valve stem of a valve, wherein the quantification chamber is formed from at least two chambers, each chamber is communicated through a communication passage, and the aerosol stock solution contains powder. It is an injection type aerosol product.

The second aspect of the present invention is the quantitative injection type aerosol product in the first invention, wherein the internal volume of the quantitative chamber is 0.8 mL or more.

A third aspect of the present invention is a quantitative injection aerosol product in the first or second invention, wherein the powder is at least one powder selected from the group consisting of silicic anhydride and cyclodextrin.

The fourth aspect of the present invention is a quantification in which the content of the powder is 0.5 w / v% (mass / volume%) or less in the aerosol stock solution in any one of the first to third inventions. It is an injection type aerosol product.

In the fifth aspect of the present invention, in any one of the first to fourth aspects, at least two small chambers of the metering chamber are arranged on one end side and the other end side in the axial direction of the metering injection valve. This is a fixed-quantity injection aerosol product in which a small chamber located on the other end side is further divided into two compartments, one inside and one outside, and communicate with each other.

According to the sixth aspect of the present invention, in the fifth aspect of the present invention, the metering chamber is provided with a valve for filling the content liquid on the wall surface of the chamber located on one end side of the metering injection valve in the axial direction. It is a type aerosol product.

In the first aspect of the present invention, in the metering injection aerosol product, the metering chamber in the metering injection valve is formed from at least two chambers, and for example, one chamber is designed to be larger depending on the positional relationship. This makes it possible to design a larger internal volume of the metering chamber.
Then, when a certain amount of contents are injected from the metering chamber to the injection port of the injection mechanism, as described above, injection failure may occur in which the injection is temporarily stopped in one injection operation. In the present invention, since the powder is contained in the aerosol stock solution contained in the aerosol container, this injection defect can be prevented.

In the second aspect of the present invention, the internal volume of the metering chamber is limited.
That is, the internal volume (total internal volume of the small chambers of the metering chamber) was limited to 0.8 mL or more.
In the present invention, the internal volume of the metering chamber can be set extremely large, for example, the internal volume can be as large as 0.8 mL to 10.0 mL, depending on the size of the container. It is possible to set a large size.

In the third aspect of the present invention, the powder in the aerosol stock solution is limited, that is, at least one powder selected from the group consisting of silicic anhydride and cyclodextrin is optimal. ..

In the fourth aspect of the present invention, the content of the powder was specified, and the content was set to 0.5 w / v% or less in the aerosol stock solution.

In the fifth aspect of the present invention, at least two chambers of the metering chamber are arranged on one end side and the other end side in the axial direction of the metering injection valve, and the chambers located on the other end side are further inside and outside. It is specified that it is divided into two compartments and communicated with each other. The one end side is the side located on the injection mechanism side when the metering injection valve is provided in the aerosol product, and the other end side is the opposite side.
In the present invention, the configuration of the quantification chamber is more specified, and the quantification chamber can be formed to be larger by dividing the small chamber located on the other end side into two compartments, an inner side and an outer side. It becomes.

The sixth aspect of the present invention is limited to the provision of a valve for filling the content liquid on the wall surface of the small chamber located on one end side of the metering chamber of the metering injection valve. The scope of rights includes an aerosol container with a filling valve for filling the contents.
By lowering the sealing performance in the metering chamber, the rate of injection defects can be reduced.

In the present invention having the above configuration, the internal volume of the metering chamber can be made larger, and the problematic injection failure can be eliminated.

FIG. 1 is a central vertical cross-sectional view of the first embodiment of the metering injection valve used in the metering injection aerosol product of the present invention, showing the non-operating state and the storage state. FIG. 2 is a central vertical cross-sectional view showing a state when the metering injection valve according to the first embodiment is in operation. FIG. 3 is a central vertical cross-sectional view of the metering injection valve according to the second embodiment of the present invention, showing the states during non-operation and storage.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
In the present specification, the side where the injection mechanism is provided is referred to as "one end side" or "upper side" with respect to the axial direction of the aerosol product, and the opposite side is referred to as "the other end side". Sometimes referred to as "downward". The directions such as "up" and "down" are the directions shown in the drawings unless otherwise specified.

(First Embodiment)
The quantitative injection type aerosol product of the present invention (hereinafter, also simply referred to as “the aerosol product of the present invention”) is an aerosol container having an opening at one end containing a content composed of an aerosol stock solution and a propellant, and the aerosol. It consists of a metering injection valve provided at one end of the container and having a metering chamber inside, and an injection mechanism connected to the valve stem of the metering injection valve.

FIG. 1 is a central vertical cross-sectional view of an embodiment of a metering injection valve used in the aerosol product of the present invention, showing states during non-operation and storage.
FIG. 2 is a central vertical sectional view showing a state during operation according to the above embodiment.

In these figures, the illustration of the entire aerosol container is omitted, and the portion of the metering injection valve 10 and the mounting cup 20 on which the metering injection valve 10 is arranged is shown. The mounting cup 20 has an annular peripheral edge portion, and has a through hole at a substantially central portion thereof. The metering injection valve 10 is arranged in the mounting cup 20 with the valve stem 12 protruding from the through hole of the mounting cup 20. The peripheral edge of the mounting cup 20 is fixed to the opening of the aerosol container (not shown) filled with the contents by crimping or the like, and the injection mechanism (not shown) is externally fitted to the valve stem 12 protruding outward. To obtain an aerosol product. By pushing down the injection mechanism from the outside, the valve stem 12 is pushed down, the discharge valve of the metering injection valve 10 is opened, and the contents in the aerosol product are discharged from the upper end opening of the valve stem 12 by gas pressure.

The metering injection valve 10 includes a housing 11, a valve stem 12 fitted from the upper end of the housing 11, a coil spring 13 as an urging member that constantly biases the valve stem 12 upward, and a coil spring 13 below the coil spring 13. It includes an arranged metering chamber 15, a dip tube 17 connected to the lower end 16 of the housing 11, and a shield member 18 in contact with the lower end of the coil spring 13.

From the dip tube 17 to the inside of the housing 11 and to the upper end opening 12k of the valve stem 12, a flow path through which the contents in the aerosol container flow is formed, and in the non-operating state of FIG. 1, this flow path is formed. The orifice 12h provided above the valve stem 12 is sealed by the presence of the stem rubber 19.

That is, in the non-operating state of FIG. 1, the valve rod portion 12v at the lower end of the valve stem 12 is located at the uppermost position, and a shield member that interacts with the valve rod portion 12v to seal the flow path. A gap was formed between the annular valve portion 18v provided on the inner peripheral wall of the through hole in the vertical direction of 18, and the contents in the aerosol container entered, stored, and filled in the metering chamber 15 and the flow passage. It is in a state.

More specifically, the structure of the valve stem 12 is composed of a rod-shaped one that is long in the vertical direction, and a hole portion 12t as a flow passage is formed in the axial core portion upward from the substantially central portion thereof, and the hole portion 12t is formed. An orifice 12h is drilled slightly below the central portion of the above, and an annular flange portion 12f is provided on the lower outer peripheral surface thereof. A coil spring 13 as an urging member is interposed and equipped between the annular flange portion 12f and the upper end surface of the shield member 18.

Therefore, the valve stem 12 is always urged upward, and in the non-operating state of FIG. 1, the orifice 12h of the valve stem 12 is sealed by blocking the flow passage due to the presence of the stem rubber 19. It is in a state.

The upper end edge of the housing 11 of the metering injection valve 10 is crimped, sandwiched and fixed by a substantially central portion of the mounting cup 20.
Therefore, the stem rubber 19 is held between the upper end inner peripheral edge of the housing 11 and the mounting cup 20, seals and opens the valve stem 12 with the orifice 12h, and distributes the contents in the aerosol container. Can be blocked and opened.

Next, the quantitative chamber 15 which is one of the characteristic parts according to the present invention will be described in detail.
The metering chamber 15 is provided in the lower portion of the housing 11 of the metering injection valve 10 mounted on the aerosol container.
The metering chamber 15 is provided in the lower portion of the housing 11 on the outer periphery of the lower flow passage 11t formed in the axial core portion thereof.

That is, it is provided outside the peripheral wall 11w of the lower flow passage 11t in the lower portion of the housing 11.
The passage 15t for inflowing and discharging the contents into the quantification chamber 15 is formed on the peripheral wall 11w side of the downward flow passage 11t in the top portion 15s of the quantification chamber 15.

Further, the quantification chamber 15 is formed of two small chambers, and in the first embodiment, the quantification chamber 15 is formed of an inner inner quantification chamber 15i and an outer outer quantification chamber 15j.
That is, the quantification chamber 15 is divided into an inner quantification chamber 15i and an outer quantification chamber 15j by an annular partition wall 15k that hangs downward from the top portion 15s.
Therefore, the passage 15t for inflowing and discharging the contents into the quantitative chamber 15 is formed at the upper end (top) of the inner quantitative chamber 15i.

A gap or a gap is provided between the annular partition wall 15k and the bottom surface of the metering chamber 15 as a communication passage, and the inner metering chamber 15i and the outer metering chamber 15j communicate with each other through this passage. ..
If this interval is not provided, the inner quantification chamber 15i and the outer quantification chamber 15j cannot communicate with each other, and one quantification chamber 15 cannot be formed.
By forming the quantification chamber 15 into a double structure of the inner quantification chamber 15i and the outer quantification chamber 15j in this way, the internal volume of the quantification chamber 15 can be appropriately formed to be large as needed.

Next, the operation of the metering injection valve 10 according to the present invention will be described in detail with reference to FIG.
FIG. 2 shows a state in which the valve stem 12 is pressed in the direction of arrow D in the non-operating state of FIG. 1, and the contents in the metering chamber 15 are discharged from the upper end opening 12k of the valve stem 12.

Specifically, when the valve stem 12 is pushed in the direction of the arrow D, the coil spring 13 contracts, and the valve rod portion 12v at the lower portion of the valve stem 12 is provided on the inner peripheral wall of the through hole of the shield member 18. It engages with the annular valve portion 18v to close and seal the flow passage.

At the same time, the orifice 12h of the valve stem 12 communicates with the upward flow passage 11r in the housing 11, and the contents stored inside the inner metering chamber 15i and the outer metering chamber 15j are provided in the top portion 15s of the metering chamber 15. It passes through 15t, flows through the upper flow passage 11r in the housing 11, passes through the orifice 12h of the valve stem 12, passes through the hole portion 12t as the flow passage of the shaft core portion above the valve stem 12, and passes through the valve stem. It will be discharged from the upper end opening 12k of 12.

By the above-mentioned one pressing operation, the contents in the metering chamber 15 and the upper flow passage 11r of the housing 11 are discharged and discharged, and by appropriately designing the internal volume of the metering chamber 15, a certain necessary twist is appropriately obtained. A large amount of contents can be discharged.

In the present invention, the internal volume of the quantification chamber 15 (the total internal volume of the small chambers of the quantification chamber 15) is preferably 0.8 mL or more. When the internal volume is 0.8 mL or more, a sufficient feeling of use can be obtained and overuse can be prevented. The internal volume can be appropriately set between 0.8 and 10.0 mL.

Here, the reason why the configuration of the metering chamber 15 is adopted is not only to secure an internal volume of an appropriate size as described above, but also to store the inside of the metering chamber 15 due to the double structure of the metering chamber. This is because the liquid phase and the gas phase of the contents to be processed can be made appropriate, and the contents in the metering chamber can be discharged to the outside in a more complete form by the pressure of the gas phase. Is.

(Second Embodiment)
FIG. 3 is a central longitudinal sectional view of a metering injection valve of an aerosol product according to a second embodiment of the present invention, showing a non-operating state and a state at the time of storage.
The fixed-quantity injection valve 30 illustrated in FIG. 3 has the same basic structure as that of the first embodiment, except that the filling valve 33 is provided.

The filling valve 33 is used when filling the aerosol container with the contents, and is used when filling the aerosol container with the contents while pressing the valve stem 12.
The filling valve 33 is composed of an annular belt 33b made of a flexible material and a horizontal hole 33h, and by forcibly filling the contents, the sealing between the annular belt 33b and the horizontal hole 33h is released, and the aerosol is released. The structure is such that the contents are filled in the container.
Since other configurations are the same as those of the first embodiment, the description thereof will be omitted.

In the present invention, the shape, size, material, etc. of the metering injection valve can be appropriately selected and used.

For example, in the first embodiment and the second embodiment, regarding the sealing of the valve rod portion 12v below the valve stem 12 and the shield member 18, if the flow passage can be sealed by pressing the valve stem 12. It is also possible to provide an annular valve portion inside the flow passage of the housing 11 without forming the shield member 18 separately.

Further, as for the manufacturing of the housing, in the above embodiment, the lower member and the upper member are united, but this can also be freely designed and assembled.

The structure and configuration of the aerosol container of the aerosol product according to the present invention have been described above, and the contents thereof will be described below.

According to the studies by the present inventors, the cause of the injection failure of the quantitative injection type aerosol product is unknown, but it is presumed that the bumping phenomenon of the contents, especially the propellant, is involved. In the present invention, the injection failure could be improved by mixing a powder such as silicic anhydride or cyclodextrin into the aerosol stock solution.

The contents of the aerosol product of the present invention consist of an aerosol stock solution and a propellant. The aerosol stock solution contains a solvent, powder, active ingredient and the like.

<Solvent>
Examples of the solvent used in the aerosol stock solution include organic solvents and water. Examples of the organic solvent include higher fatty acid esters and alcohols, hydrocarbon solvents, glycol ethers having 3 to 6 carbon atoms, and ketone solvents. The higher fatty acid ester preferably has a total number of carbon atoms of 16 to 20, and examples thereof include isopropyl myristate, butyl myristate, hexyl laurate, and isopropyl palmitate. Of these, isopropyl myristate is particularly suitable. As the alcohols, lower alcohols having 2 to 3 carbon atoms such as ethanol and isopropanol are preferable. As the hydrocarbon solvent, n-paraffin and isoparaffin are preferable. Examples of water include tap water, ion-exchanged water, pure water, purified water and the like. One of these may be used alone, or two or more thereof may be used in combination.

<Powder>
As the powder, conventionally known powders can be used, and the material, shape, particle size, particle structure and the like can be appropriately selected. For example, inorganic powder, organic powder, pigment and the like can be mentioned.
Examples of the inorganic powder include silicic acid anhydride (silica), titanium oxide, calcium carbonate, magnesium silicate, aluminum silicate, magnesium aluminometasilicate, titanium oxide, zeolite, talc, kaolin, mica, sericite, magnesium carbonate. , Calcium sulfate, hydroxyapatite, ceramic powder, boron titanate, molybdenum disulfide and the like. Examples of the organic powder include cyclodextrin, polyamide resin powder, polyethylene powder, polystyrene powder, polymethyl methacrylate powder, cellulose powder, silicone resin powder, chlorohydroxyaluminum, tornafate, lidocaine, chlorohexidine gluconate and the like. Examples of the pigment include titanium dioxide, iron oxide, yellow iron oxide, carbon black, ultramarine blue, aluminum powder, copper powder and the like. One of these may be used alone, or two or more thereof may be used in combination. Among these, it is preferable to use at least one powder selected from the group consisting of silicic anhydride and cyclodextrin from the viewpoint of improving the injection failure of the quantitative injection aerosol.

The shape of the powder is not particularly limited, and examples thereof include a spherical shape, a rod shape, a plate shape, a needle shape, an indefinite shape, a scale shape, and a spindle shape. Among these, spherical powder is preferable from the viewpoint of preventing clogging in the fixed-quantity injection valve and the injection mechanism.

The particle size of the powder is preferably 0.1 to 20 μm as an average particle size, more preferably 1 to 10 μm, still more preferably 2 to 5 μm. When the average particle size of the powder is in the above range, the contents can be injected in a desired form such as mist, and the injection pattern is not disturbed.

The specific surface area of the powder is preferably 100~1000m ² / g, more preferably 100~800m ² / g, more preferably 200~800m ² / g. When the specific surface area of the powder is within the above range, injection defects are likely to be improved.

Further, the powder may be porous, non-porous, or hollow.

The content of the powder is preferably 0.001 to 5 w / v% in the aerosol stock solution, more preferably 0.005 to 1 w / v%, further preferably 0.01 to 0.5 w / v%, and 0. .05-0.5 w / v% is particularly preferable. When the powder is contained in an amount of 0.001 w / v% or more, the effect of the present invention can be easily obtained, and when the powder is 5 w / v% or less, injection defects can be easily improved.

<Active ingredient>
The active ingredient is an ingredient contained to impart a desired effect.
As an active ingredient, for example
Pyrethroid compounds such as pyrethrin, alesulin, phthalthrin, resmethrin, flamethrin, phenothrin, permethrin, empentrin, praretrin, cyphenotrin, imiprothrin, transfluthrin, metoflutrin, monfluorotrin, etc. Organic phosphorus compounds, carbamate compounds such as carbalyl and propoxul, peppermint oil, orange oil, sardine oil, kei oil, butterfly oil, televisionn oil, eucalyptus oil, hiba oil, jasmine oil, neroli oil, peppermint oil, bergamot oil, buty. Glen oil, lemon oil, lemongrass oil, cinnamon oil, citronella oil, geranium oil, citral, l-menthol, citronellyl acetate, synamic aldehyde, terpineol, nonyl alcohol, cis-jasmon, limonene, linalol, 1,8-cineole , Geraniol, α-pinene, p-menthan-3,8-diol, eugenol, menthyl acetate, timole, benzyl benzoate, benzyl salicylate and other insecticidal essential oil components, as well as other metoprenes, pyriproxyfen, methoxadiazone, fipronil, Insecticide such as amidoflumeth,
Pest repellents such as p-menthane-3,8-diol, DEET, di-n-butylsuccinate, hydroxyanisole, IR3535, icaridin, etc.
Phenolic fungicides such as triclosan, carvanilide fungicides such as trichlorocarbanilide, pyridine fungicides such as zinc pyrithione, cationic fungicides such as cetylpyridinium chloride and benzalkonium chloride, and amine fungicides such as trialkyltriamine. Fungicide such as agent,
Natural fragrances consisting of essential oils such as peppermint oil, peppermint oil, sparemint oil, igusa, hinoki, citronella, citral, citroneral, lemon, lemongrass, orange, eucalyptus, lavender, geraniol, citronellal, eugenol, undecalactone, limonene, Artificial fragrances such as phenetyl alcohol, fragrances such as natural fragrances and blended fragrances obtained by adjusting these natural fragrances,
Persimmon extract, green tea extract, grapefruit extract, grapefruit seed extract, yuzu extract, moso chiku extract, moso chiku dry distillate, yuzu seed extract, orange extract, luibos tea extract, yukka extract, olive leaf extract Powder, chitosan, oolong tea extract, grape seed extract, mullayer extract, perilla oil, cha dry distillate, licorice oil extract, perilla seed extract, mustard extract, broccoli powder, ginger extract, egonoki extract, kawarayomogi extract Deodorization of various plant extracts such as stuff, sardine extract, lotus extract, maple extract, pepper extract, citrus seed extract, raw soybean extract, pimenta extract, fruit extract, fruit seed extract, etc. Agents and the like can be mentioned.

The content of the active ingredient is not particularly limited as long as the desired effect can be obtained, but is preferably 0.01 to 99.9 w / v%, more preferably 0.1 to 90 w / v%, for example, in the aerosol stock solution. It is preferable, and 0.5 to 70 w / v% is more preferable.

The aerosol stock solution is obtained by mixing liquid components other than powder among the above-mentioned components and dispersing the powder.

<Injector>
Examples of the propellant used in the aerosol product of the present invention include liquefied petroleum gas (LPG), dimethyl ether (DME), trans-1,3,3,3-tetrafluoropropa-1-ene, and trans-2,3,3. Examples thereof include hydrofluoroolefins such as 3-tetrafluoropropa-1-ene, nitrogen gas, carbon dioxide gas, nitrous oxide, compressed air and the like. The above propellant can be used alone or in a mixed state, but one containing LPG or DME as a main component is preferable because it is easy to use.

The compounding ratio of the aerosol stock solution and the propellant in the aerosol product may be appropriately determined according to the desired spray form (size of spray particles, spray pattern, jet pressure, spray amount, etc.).

Although the embodiments relating to the present invention have been described above, various design changes can be made in the present invention.

Hereinafter, the evaluation test results regarding the injection state of the aerosol product by mixing various powders with the contents of the aerosol product according to the present invention will be described.

A. Evaluation test for various powders with base formulation at low temperature <Method>
(1) The sample (aerosol product) was stored upright overnight under the condition of 5 ° C.
(2) The sample was taken out, and immediately after that, injection was performed to confirm the injection state.
(3) After that, the same test was performed a total of 5 times at intervals of 1 day or more.
(4) The ratio of injection defects, in which a fixed amount of total amount cannot be injected without shaking, was calculated.

The prescriptions of the samples are shown in Tables 1 to 3 below.
As the active ingredient of the aerosol product, transfluthrin, which is an insecticidal ingredient such as flies, mosquitoes and cockroaches, was used.
The types of powders to be tested are shown in the table of test results.

The aerosol container is as follows.
(A) Valve: 1 mL metering injection valve (first embodiment) / 1 mL metering valve with filling valve (second embodiment)
(B) Injection mechanism: Press button with nozzle diameter φ2.0 mm (c) Aerosol can: AE220 tin can (full injection capacity 289 mL)

The evaluation test results are as follows.

Samples 1 and 2 are test results when an aerosol container (the above-mentioned second embodiment) provided with a 1 mL metering injection valve with a filling valve was used and silicon dioxide was mixed with an aerosol stock solution.
As can be seen from Table 4, in the case of sample 3 (without powder), 80% of the samples had injection defects, but samples 1 and 2 did not show injection defects.

Specimens 4 to 7 are the test results with other silicic anhydrides.
From the results in Table 5, in each of the samples 4 to 7, the injection failure could be reduced as compared with the sample 3 (without powder), and in particular, no injection failure was observed in the samples 4 and 6.

Specimens 8 to 11 are similarly test results with powders other than silicic anhydride.
From the results in Table 6, all of the samples 8 to 11 were able to reduce the injection failure as compared with the sample 3 (without powder), and no injection failure was particularly observed in the sample 8.

Specimens 12 to 15 are test results of silicic acid anhydride with or without a filling valve, in other words, the first embodiment (without equipment, 1 mL metering injection valve) and the second embodiment (without equipment). The test results of a sample equipped with a metering injection valve according to (1mL metering injection valve with a filling valve) are shown.
As can be seen from Table 7, all of the samples 12 to 15 can reduce injection defects as compared with the samples 16 and 17 which do not contain powder, and the samples 16 and 17 have injection defects in any of the quantitative injection valves. However, when powder was contained, the proportions of the samples 13 and 15 provided with the metering injection valve with the filling valve were smaller than those of the samples 13 and 15.

B. Evaluation test in various other prescriptions <Method>
(1) Specimens (aerosol products) were stored upright overnight under each temperature condition.
(2) The sample was taken out, and immediately after that, injection was performed to confirm the injection state.
(3) After that, the same test was carried out 5 times with 2 to 5 samples of each sample at intervals of 1 day or more.
(4) The ratio of injection defects that cannot be injected without shaking was calculated.

The formulations of the samples are shown in Tables 8 to 10 below.

The aerosol container is as follows.
(A) Valve: 1 mL fixed-quantity injection valve (first embodiment above)
(B) Injection mechanism: Press button with nozzle diameter φ2.0 mm (c) Aerosol can: AE220 tin can (full injection capacity 289 mL)

The evaluation test results are as follows.

As can be seen from Table 11, as the content of the powder in the aerosol stock solution increased, the rate of injection defects tended to decrease.
However, if too much powder is added, valve malfunction (specifically, valve stem movement may be impaired) may occur, but the amount of powder in the aerosol stock solution is 0.5 w for Formulations 1 and 2. It was less than / v%, and in Formulation 3, it was hardly seen at 0.05 w / v% or less. Therefore, although it depends on the formulation, it has been found that the content of the powder is particularly preferably 0.5 w / v% or less in the aerosol stock solution because it does not cause malfunction of the valve.

As described above, in the present invention, the metering chamber in the metering valve of the aerosol product can be made larger, and in order to eliminate injection defects due to this, the injection is performed by mixing powder into the contents. It was possible to provide a quantitative injection type aerosol product capable of eliminating defects and discharging the contents in the quantitative chamber more completely.

Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. This application is based on a Japanese patent application filed on December 5, 2017 (Japanese Patent Application No. 2017-233574), the contents of which are incorporated herein by reference.

10, 30 Metering injection valve 11 Housing 11r Upper flow passage 11t Downward flow passage 11w Peripheral wall 12 Valve stem 12h Orifice 12k Upper end opening 12t Hole 12v Valve rod 13 Coil spring 15 Metering chamber 15i Inner metering chamber 15j Outer metering chamber 15k Partition wall 15s Top 15t Passage 17 Dip tube 18 Shield member 18v Annular valve 19 Stem rubber 20 Mounting cup

Claims (6)

From an aerosol container containing the contents of an aerosol stock solution and an propellant, a metering injection valve provided at one end of the aerosol container and having a metering chamber inside, and an injection mechanism connected to the valve stem of the metering injection valve. It is an aerosol product that consists of
The metering chamber is formed from at least two chambers, and each chamber is communicated through a communication passage.
A quantitative injection type aerosol product in which the aerosol stock solution contains powder. The quantitative injection type aerosol product according to claim 1, wherein the internal volume of the quantitative chamber is 0.8 mL or more. The quantitative injection aerosol product according to claim 1 or 2, wherein the powder is at least one powder selected from the group consisting of silicic anhydride and cyclodextrin. The quantitative injection type aerosol product according to any one of claims 1 to 3, wherein the content of the powder is 0.5 w / v% or less in the aerosol stock solution. At least two chambers of the metering chamber are arranged on one end side and the other end side in the axial direction of the metering injection valve, and the chambers located on the other end side are further divided into two compartments inside and outside and communicate with each other. The quantitative injection type aerosol product according to any one of claims 1 to 4. The quantitative injection type aerosol product according to claim 5, wherein a valve for filling the content liquid is provided on the wall surface of the small chamber of the metering chamber located on one end side in the axial direction of the metering injection valve.

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