JP2009227286A - Aerosol container, and aerosol product using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To develop an aerosol container and an aerosol product which are not corroded even when an aerosol composition corroding a metal and having strong permeability is filled therein, and capable of preventing the sealability and the workability of a valve from being considerably degraded even when a stem rubber is swollen. <P>SOLUTION: The aerosol product includes an aerosol container 2 and aerosol composition. The aerosol container includes non-metallic container body and an aerosol valve fixed to the container body. The aerosol valve has a valve mechanism consisting of a stem 10, a stem rubber 11 and a spring 12. The stem consists of a stem upper portion 10a having a stem hole 10c and a columnar stem lower portion 10b with its upper side being recessed. The stem hole is sealed by an upper end outer peripheral edge of the stem lower portion 10b urged by the spring and a stem rubber lower side. The stem rubber consists of an acrylonitrile butadiene rubber. The aerosol composition with the swelling ratio of the stem rubber being 10-30% is filled in the aerosol container. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an aerosol container and an aerosol product using the aerosol container. More specifically, an aerosol container comprising a non-metallic container main body and an aerosol valve having a specific valve mechanism fixed to the mouth of the container main body, and the swelling ratio of the stem rubber is 10 It relates to an aerosol product filled with a specific aerosol composition of ˜30%.

  Conventionally, in the development of aerosol containers filled with hair dyes, benzyl alcohol has been used to allow dyes such as acid dyes and oxidative dyes to penetrate into hair (intradermal and cortical). And N-methylpyrrolidone and other highly permeable solvents are contained, and there is a problem that an aerosol container made of metal is easily corroded. In order to solve such a problem, Patent Document 1 discloses a polyester-made material for the purpose of preventing metal corrosion and for suppressing the increase in the internal pressure of the aerosol container due to the reaction or decomposition of hydrogen peroxide as a content. Techniques for aerosol products using aerosol containers are disclosed.

JP-A-7-309382

  However, in the aerosol product of Patent Document 1, since the stem rubber of the aerosol valve is always in contact with the aerosol composition, when the solvent is contained, the stem rubber swells greatly, and the operability of the valve, especially when used. There is a problem that the load when the button is pressed down (hereinafter referred to as an operating load) increases and feels hard, and the push button is pressed down and there is a difference in the timing at which injection starts, causing a problem of significant decrease. Therefore, currently, a stem rubber containing fluorine having a small swelling rate is used, but the stem rubber has a problem of high cost.

  The aerosol container and the aerosol product of the present invention have been made in view of the above-described conventional problems, and are not corroded even when filled with a highly permeable aerosol composition that corrodes metal, An object of the present invention is to obtain a stable aerosol container and an aerosol product in which the sealing performance and operability of the valve are not significantly lowered even when the stem rubber swells greatly.

The aerosol container according to the present invention is an aerosol container composed of a non-metallic container main body and an aerosol valve fixed to the mouth of the container main body,
The aerosol valve compresses a valve mechanism comprising a stem, a stem rubber, and a spring, a housing that accommodates the valve mechanism, and a gasket provided on the upper surface of the mouth of the non-metallic container body that holds the housing. A cover cap secured to the mouth of the container body,
The stem comprises a cylindrical stem upper part having a stem hole, and a cylindrical stem lower part whose upper surface is recessed downward,
The stem hole is sealed by the outer periphery of the upper surface of the lower portion of the stem, which is biased upward by a spring compressed at both ends of the housing and the lower portion of the stem, and the lower surface of the stem rubber,
The stem rubber is made of acrylonitrile butadiene rubber.

  The stem rubber preferably has a thickness of 0.9 to 1.4 mm.

  Moreover, the aerosol product according to the present invention is characterized in that the aerosol container is filled with an aerosol composition having a stem rubber swelling ratio of 10 to 30%.

  It is preferable that the aerosol composition contains an acidic aqueous stock solution and a liquefied gas.

  It is preferable that the aerosol composition is one selected from an acidic hair dye, an oxidizing agent for two-component hair dye, and an oxidizing agent for a permanent agent.

  It is preferable that the aerosol composition contains a penetration enhancer.

  According to the present invention, even when filled with a highly permeable aerosol composition that corrodes metal, it is not corroded, and it has a valve mechanism with a specific structure even if the stem rubber swells greatly. Therefore, it is possible to obtain a stable aerosol container in which the sealing performance and operability of the valve are not significantly reduced. In addition, according to the present invention, a stable aerosol in which the sealing performance and operability of the valve are not significantly deteriorated despite being filled with an aerosol composition in which the swelling ratio of the stem rubber is as large as 10 to 30%. You can get a product.

The aerosol container of the present invention is an aerosol container composed of a non-metallic container body and an aerosol valve fixed to the mouth of the container body,
The aerosol valve compresses a valve mechanism comprising a stem, a stem rubber, and a spring, a housing that accommodates the valve mechanism, and a gasket provided on the upper surface of the mouth of the non-metallic container body that holds the housing. A cover cap secured to the mouth of the container body,
The stem comprises a cylindrical stem upper part having a stem hole, and a cylindrical stem lower part whose upper surface is recessed downward,
The stem hole is sealed by the outer periphery of the upper surface of the lower portion of the stem, which is biased upward by the spring compressed at both ends of the housing and the lower portion of the stem, and the lower surface of the stem rubber,
The stem rubber is made of acrylonitrile butadiene rubber.

  In addition, the aerosol product of the present invention is characterized in that the aerosol container is filled with an aerosol composition in which the swelling ratio of the stem rubber is 10 to 30%.

  Hereinafter, an aerosol container and an aerosol product of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a side sectional view of an aerosol product in one embodiment (Embodiment 1) of the aerosol product of the present invention. Fig.2 (a) is side sectional drawing for demonstrating the closed state of the stem hole of the aerosol container in one Embodiment (Embodiment 1) of the aerosol container of this invention. FIG.2 (b) is side surface sectional drawing for demonstrating the open state of the stem hole of the aerosol container in one Embodiment (Embodiment 1) of the aerosol container of this invention. Fig.3 (a) is side sectional drawing for demonstrating the closed state of the stem hole of the conventional aerosol container. FIG.3 (b) is side surface sectional drawing for demonstrating the open state of the stem hole of the conventional aerosol container.

Embodiment 1
As shown in FIG. 1, the aerosol product 1 according to the first embodiment includes an aerosol container 2 and an aerosol composition 3. The aerosol container 2 is made of a synthetic resin such as polyethylene terephthalate or a nonmetallic material such as pressure-resistant glass. It consists of a container body 4 molded by using an aerosol valve 5 fixed to the container body 4.

  The container body 4 includes a bottomed cylindrical trunk portion 6, a shoulder portion 7 that narrows upward from the upper portion of the trunk portion 6, a cylindrical neck portion 8 that extends upward from the upper portion of the shoulder portion 7, and an upper portion of the neck portion 8. And a mouth portion 9 having a mouth side surface 9a protruding outward and a planar mouth top surface 9b. The container body 4 has an upper surface of the mouth portion to prevent the aerosol valve 5 from slipping out when the internal pressure becomes high, such as when the aerosol product 1 is placed at a high temperature. A groove extending outward from the center may be provided in 9b, or a gas discharge passage such as a groove extending in the axial direction may be provided in the mouth side surface 9a.

  As shown in FIGS. 2A and 2B, the aerosol valve 5 includes a valve mechanism 13 including a stem 10, a stem rubber 11, and a spring 12, a housing 14 that houses the valve mechanism 13, and a housing 14. A cover cap 16 that is held and fixed to the mouth 9 so as to compress the gasket 15 disposed on the mouth upper surface 9b of the container body 4 is provided.

  The stem 10 is molded using a synthetic resin such as nylon or polyacetal, or a corrosion-resistant metal such as stainless steel. The stem 10 includes a cylindrical stem upper portion 10a and a columnar stem lower portion 10b whose upper surface is recessed in a mortar shape, and a stem hole 10c is provided at the base of the stem upper portion 10a. The stem hole 10 c is always sealed by the stem 10 being biased upward by the spring 12 and the upper surface outer peripheral edge 10 d of the stem lower portion 10 b being pressed against the lower surface of the stem rubber 11. An injection member (not shown) is attached to the stem upper portion 10a, and an in-stem passage 10e communicating with the injection member from the stem hole 10c is provided in the stem upper portion 10a.

  The spring 12 is made of a corrosion-resistant metal such as SUS304 or SUS316, and is interposed between the bottom of the housing 14 and the stem lower part 10b to constantly urge the stem 10 upward.

  The stem rubber 11 is molded into a plate-like ring shape using acrylonitrile butadiene rubber (NBR). The thickness of the stem rubber 11 is such that when the stem rubber 11 is swollen to a predetermined thickness by the aerosol composition 3 described later, the sealing performance of the stem hole 10c is not lowered and the operability of the stem 10 is not lowered. It is preferably 0.9 to 1.4 mm, and more preferably 1.0 to 1.3 mm. When the thickness of the stem rubber 11 is thinner than 0.9 mm, the sealing property tends to be lowered, and when thicker than 1.4 mm, the operability tends to be lowered due to swelling.

  The housing 14 is molded using a synthetic resin such as nylon, polyacetal, polybutylene terephthalate, and houses the valve mechanism 13 including the stem 10, the stem rubber 11, and the spring 12 described above. The housing 14 has a bottomed cylindrical housing main body 14a, a stem rubber accommodating portion provided on the upper portion of the housing main body 14a, a flange portion 14b provided outside the stem rubber accommodating portion, and a downward direction from the housing main body 14a. It has a tube mounting portion 14c that extends in a cylindrical shape and for mounting the dip tube 17. An introduction hole 18 for introducing the aerosol composition 3 from the dip tube 17 into the housing main body 14a is formed at the bottom of the housing main body 14a.

  The dip tube 17 is molded using a synthetic resin such as polypropylene and a corrosion-resistant metal such as stainless steel. The upper end of the dip tube 17 is attached to the tube attachment portion 14c at the lower part of the housing, and the lower end extends to the vicinity of the container bottom.

  The cover cap 16 is formed into a convex shape using a metal plate such as aluminum or tinplate, has an insertion port 16a for inserting the stem upper portion 10a at the center of the upper portion, and holds the flange portion 14b of the housing 14. The upper part 16b and the adhering part 16c for deform | transforming a lower end outer periphery inside and adhering to the opening | mouth part 9 of the container main body 4 are provided. On the inner surface of the cover cap 16, a protective film such as a synthetic resin coating such as polyamideimide or epoxyphenol, or a synthetic resin laminate such as polyethylene terephthalate or nylon may be provided.

  The aerosol valve 5 is placed in the mouth portion 9 of the container body 4 after filling the stock solution of the aerosol composition 3, and the lower end of the cover cap fixing portion 16c is inward while pushing down the aerosol valve 5 below the axis of the container. It is fixed by clinching. At this time, a gasket 15 for sealing between the container main body 4 and the aerosol valve 5 is interposed between the mouth upper surface 9 b of the container main body 4 and the cover cap 16. The gasket 15 may be attached to the aerosol valve 5 and handled integrally, or may be attached to the mouth upper surface 9b of the container body 4. The gasket 15 is not particularly limited. For example, acrylonitrile butadiene rubber (NBR), fluorine-containing NBR, butyl rubber (IIR), styrene butadiene rubber (SBR), isoprene rubber (IR), chloroprene rubber (CR), silicone rubber Synthetic rubbers such as, and thermoplastic elastomers such as polyolefin elastomers, polyester elastomers, polyamide elastomers, and silicone elastomers may be used.

  As shown in FIG. 2A, in the aerosol product 1 of the present invention, in a normal state, the stem hole 10c is urged upward by the stem 10 by the spring 12, and the upper peripheral edge 10d of the stem lower part 10b is the stem. The rubber 11 is sealed by being pressed against the lower surface. As shown in FIG. 2 (b), when used, stress is applied in the direction of arrow F so as to push down the stem 10, whereby the upper peripheral edge 10d of the stem lower part 10b is separated from the lower surface of the stem rubber 11, and the stem hole 10c communicates. At this time, the aerosol composition 3 is introduced from the dip tube 17 into the housing, and is injected from the injection hole of the injection member through the stem hole 10c and the stem passage 10e. When the stress is eliminated, the stem is returned to the original position by the spring, and the upper surface outer peripheral edge 10d of the lower portion of the stem is pressed against the lower surface of the stem rubber 11 to seal the stem hole.

  The aerosol composition 3 suitably filled in the aerosol container 2 is such that the stem rubber 11 swells 10 to 30%, preferably 12 to 25%, and contains, for example, an acidic aqueous stock solution and a liquefied gas. Examples include aerosol composition 3. The swelling rate is calculated from the thickness before the stem rubber is swollen and the thickness when the stem rubber is swollen and stabilized.

  Examples of the acidic aqueous stock solution include an acidic hair dye, an oxidizing agent for a two-component hair dye, an oxidizing agent for a two-component perm agent, and a decolorizing agent.

  The acidic hair dye comprises an acidic aqueous stock solution in which an acidic dye, a penetration accelerator, a pH adjuster, and the like are blended, and a liquefied gas such as liquefied petroleum gas, dimethyl ether, and a mixture thereof.

  The acidic dye is a component for dyeing hair in a desired color. For example, Red No. 2, Red No. 3, Red No. 102, Red No. 104, Red No. 105, Red No. 106, Yellow No. 4, Yellow No. 5 No. 3, Green No. 3, Blue No. 1, Blue No. 2, Red No. 201, Red No. 206, Red No. 227, Red No. 230, Red No. 231, Red No. 232, Orange No. 205, Orange No. 207, Yellow No. 202, Yellow 203, Green 201, Green 204, Green 205, Blue 202, Blue 203, Blue 205, Brown 201, Brown 201, Red 401, Red 502, Red 503, Red 504 No., red 506, orange 403, yellow 402, yellow 403 (1), yellow 406, yellow 407, green 401, green 402, purple 401, black 401 and the like. The blending amount of the acid dye is preferably 0.01 to 5% by weight, more preferably 0.1 to 3% by weight in the aqueous stock solution. When the blending amount of the acidic dye is less than 0.01% by weight, the hair cannot be dyed sufficiently, and when it exceeds 5% by weight, the dyeing effect corresponding to the blending amount cannot be obtained.

  The penetration enhancer is a component for facilitating the penetration of the acid dye into the hair and enhancing the hair dyeing effect. For example, an aromatic alcohol such as benzyl alcohol, N-methylpyrrolidone, N-ethylpyrrolidone and the like N -Alkyl pyrrolidone, alkylene carbonates such as ethylene carbonate and propylene carbonate, and the like. The blending amount of the penetration enhancer is preferably 3 to 30% by weight, more preferably 5 to 25% by weight in the aqueous stock solution. When the blending amount of the penetration accelerator is less than 3% by weight, it is difficult to obtain a sufficient hair dyeing effect, and when it exceeds 30% by weight, the hair and scalp are liable to be adversely affected.

  The pH adjuster is a component for making the pH of the aqueous stock solution acidic and allowing the acidic dye to easily penetrate into the hair and enhancing the hair dyeing effect, for example, citric acid, glycolic acid, succinic acid, tartaric acid, lactic acid, Examples include weak acids such as fumaric acid, malic acid, butyric acid, valeric acid, oxalic acid, maleic acid, and phosphoric acid. The blending amount of the pH adjuster is such that the pH of the aqueous stock solution is 2 to 5, and further 2 to 4.

  Furthermore, for the purpose of facilitating the incorporation of the acidic dye into an aqueous stock solution and improving the feeling of use, a variety of lower alcohols such as ethanol and isopropanol, ethylene glycol and propylene glycol, 1,3-butylene glycol and glycerin are included. You may mix | blend a monohydric alcohol etc. In addition, a surfactant such as a nonionic surfactant, an anionic surfactant, or a silicone surfactant is applied to the hair for the purpose of, for example, discharging the acidic hair dye in the form of foam or improving the familiarity with the hair. Add oily components such as silicone oils, fatty acid esters, higher alcohols, higher fatty acids and hydrocarbons for the purpose of imparting and improving combing, and water-soluble polymers for the purpose of adjusting the viscosity of aqueous stock solutions. You can also. Furthermore, you may mix | blend stabilizers, such as ultraviolet rays inhibitor, vitamins, active ingredients for hair, such as an amino acid, and antiseptic | preservative.

  The oxidizing agent of the two-component hair dye is a second agent used together with an alkaline first agent containing an oxidizing dye such as paraphenylenediamine and resorcin. Examples of the oxidizing agent include hydrogen peroxide Acidic aqueous stock solution having a pH of 2 to 6, preferably 2 to 5, containing a oxidizer, a stabilizer such as a pH adjuster or a chelating agent, a penetrating agent such as a surfactant, and a flavoring agent such as a fragrance. And liquefied gas such as liquefied petroleum gas, dimethyl ether and mixtures thereof.

  The oxidizing agent for the permanent agent is a second agent that is used after applying an alkaline first agent containing a reducing agent such as thioglycolic acid to the hair, and examples of the oxidizing agent include hydrogen peroxide water PH containing 2-5, preferably 2, containing oxidizing agents such as pH adjusters and buffering agents, penetrating agents such as surfactants, coloring agents such as pigments, and flavoring agents such as fragrances. 0.5 to 4.5 acidic aqueous concentrate and liquefied gas such as liquefied petroleum gas, dimethyl ether and mixtures thereof.

  Note that the aerosol product 1 of the present invention is a valve mechanism in which the stem hole 10c is sealed by pressing the upper surface outer peripheral edge 10d of the stem lower portion 10b against the lower surface of the stem rubber 11, FIG. As shown in FIG. 3B, compared with the valve mechanism 13 that seals the stem hole 10c with the inner diameter surface of the stem rubber 11 in the conventional aerosol container 19, the stem 10 is pushed down until the stem hole 10c is opened. Distance (hereinafter referred to as an opening stroke) is shortened. Therefore, even if acrylonitrile butadiene rubber is used as the stem rubber 11 and the aerosol composition 3 having a swelling rate of 5 to 30% is filled with the stem rubber 11, not only the sealing performance when not in use but also the repeated operation of the stem Sealing performance when the aerosol product is not in use is not degraded, and the operating load of the stem 10 is not degraded, such as increased operating load and variation in the opening stroke. can do. In particular, when the thickness of the stem rubber 11 is 0.8 to 1.4 mm, the above-described effect is easily obtained. In addition, the aerosol valve 5 used in the aerosol product 1 of the present invention is fixed to the container body 4 by crimping the lower end of the cover cap 16, and the degree of compression of the outer periphery of the stem rubber 11 is not affected by the crimp. Even if the rubber 11 swells, the sealing performance when not in use and the operability of the stem 10 are unlikely to deteriorate.

  EXAMPLES Hereinafter, although an Example demonstrates this invention more concretely, this invention is not limited to these.

  The obtained aerosol product was stored in a thermostatic chamber at 25 ° C. and 45 ° C. for 3 months, and the following items were tested. The evaluation method is shown below.

a) Swelling rate of stem rubber Five stem rubbers were stored in a thermostatic chamber in a state where 5 stem rubbers were respectively held in the gas phase part and the liquid phase part of the aerosol composition, and the thickness after storage was measured. The swelling rate is an average value of values calculated based on the thickness before the test.
○: 10-30%
× 1: 30% or more × 2: 10% or less

b) Leakage amount The product weight before and after storage was measured.
○: Leakage amount 0.5% by weight or less Δ: Leakage amount 0.5-2% by weight
×: Leakage amount is 2% by weight or more

c) Stem operability The state when the stem was actuated by pushing down the injection member with a finger was evaluated.
○: No abnormality.
Δ: There is a squeaky feeling when pressed down.
×: Hard when pressed down, and the stem is difficult to return to its original position when the finger is released.

d) Appearance of stem rubber After spraying 2 g of each aerosol composition and injecting the entire amount 25 times, the aerosol valve was removed from the container body, and the appearance of the stem rubber was confirmed.
○: No abnormality.
(Triangle | delta): The trace (dent) by swelling was confirmed.
X: A crack was confirmed.

e) Stability of the open stroke The distance at which injection of the aerosol composition starts by pushing down the injection member was measured.
○: The difference from the stroke before the test is 0.5 mm or less.
(Triangle | delta): The difference with the stroke before a test is 0.5-1 mm.
X: The difference from the stroke before the test is 1 mm or more.

f) Stability of operating load The load required to inject the aerosol composition by pushing down the injection member was measured.
○: The difference from the load before the test is 0.2 N or less.
(Triangle | delta): The difference with the load before a test is 0.2-0.5N.
X: The difference with the load before a test is 0.5 N or more.

Example 1 Acid Dye Agent The following aqueous stock solution (pH 2.8) was prepared, and 45 g of the aqueous stock solution and 5 g of liquefied gas (a mixture of liquefied petroleum gas and dimethyl ether) were filled into a 100 ml polyethylene terephthalate container. The aerosol valve shown in FIG. 2 was fixed to produce an acidic hair dye aerosol product. The stem rubber was 1.1 mm in thickness and made of acrylonitrile butadiene rubber (NBR). The evaluation results are shown in Tables 1 and 2.

<Aqueous stock solution>
Black 401 No. 0.05
Red No. 206 0.08
Brown 201 0.12
Benzyl alcohol 10.00
N-methylpyrrolidone 5.00
Citric acid appropriate amount POE monostearate (15) glyceryl (* 1) 3.00
Purified water balance
Total 100.0 (wt%)

<Aerosol composition>
Aqueous undiluted solution / liquefied gas (* 2) = 90/10 (weight ratio)

* 1: TMGS-15 (trade name), manufactured by Nikko Chemicals * 2: Mixture of liquefied petroleum gas and dimethyl ether (80/20 (weight ratio))

Comparative Example 1
An acidic hair dye aerosol product was produced in the same manner as in Example 1 except that the aerosol valve shown in FIG. 3 was used. The evaluation results are shown in Tables 1 and 2.

Comparative Example 2
An aerosol product for acidic hair dye was produced in the same manner as in Example 1 except that butyl rubber was used as the stem rubber. The evaluation results are shown in Tables 1 and 2.

  As shown in Table 1, the aerosol product of Comparative Example 1 using a conventional valve and the aerosol product of Comparative Example 2 using a stem rubber made of another material have a leakage amount when stored at 25 ° C. Although no difference was observed, a squeaky sensation was generated when the injection member was pushed down, and a depression due to swelling of the stem rubber was observed when the injection member was taken out. The change in the operating stroke is difficult to feel, but it fluctuates, and the operating load is slightly increased. Further, when stored at 45 ° C., there was no difference in the amount of leakage, but the operation of pushing down the injection member was hard and the stem was difficult to return to its original position when the finger was released. The change in operating stroke was clearly felt and the operating load increased.

  On the other hand, the aerosol product of Example 1 had no change in leakage, operability, and appearance after storage regardless of the storage temperature.

  As described above, according to the aerosol container and the aerosol product of the present invention, even when filled with a highly permeable aerosol composition that corrodes metal, the valve does not corrode and the stem rubber swells due to the aerosol composition. The sealability and operability of the are not significantly reduced.

It is side surface sectional drawing of the aerosol product in one Embodiment (Embodiment 1) of the aerosol product of this invention. It is side surface sectional drawing for demonstrating the closed state of the stem hole of the aerosol container in one Embodiment (Embodiment 1) of the aerosol container of this invention. It is side surface sectional drawing for demonstrating the open state of the stem hole of the aerosol container in one Embodiment (Embodiment 1) of the aerosol container of this invention. It is side surface sectional drawing for demonstrating the closed state of the stem hole of the conventional aerosol product. It is side surface sectional drawing for demonstrating the open state of the stem hole of the conventional aerosol product.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Aerosol product 2 Aerosol container 3 Aerosol composition 4 Container body 5 Aerosol valve 6 Body part 7 Shoulder part 8 Neck part 9 Mouth part 9a Mouth side surface 9b Mouth part upper surface 10 Stem 10a Stem upper part 10b Stem lower part 10c Stem hole 10d Upper outer periphery 10e Stem passage 11 Stem rubber 12 Spring 13 Valve mechanism 14 Housing 14a Housing body 14b Flange 14c Tube mounting part 15 Gasket 16 Cover cap 16a Insertion port 16b Upper part 16c Adhering part 17 Dip tube 18 Introduction hole 19 Aerosol container

Claims (6)

An aerosol container comprising a non-metallic container body and an aerosol valve fixed to the mouth of the container body,
The aerosol valve compresses a valve mechanism comprising a stem, a stem rubber, and a spring, a housing that accommodates the valve mechanism, and a gasket provided on the upper surface of the mouth of the non-metallic container body that holds the housing. A cover cap secured to the mouth of the container body,
The stem comprises a cylindrical stem upper part having a stem hole, and a cylindrical stem lower part whose upper surface is recessed downward,
The stem hole is sealed by the outer periphery of the upper surface of the lower portion of the stem, which is biased upward by a spring compressed at both ends of the housing and the lower portion of the stem, and the lower surface of the stem rubber,
An aerosol container in which the stem rubber is made of acrylonitrile butadiene rubber. The aerosol container according to claim 1, wherein the stem rubber has a thickness of 0.9 to 1.4 mm. The aerosol product by which the aerosol composition in which the swelling rate of the said stem rubber will be 10 to 30% is filled in the aerosol container of Claim 1. The aerosol product according to claim 3, wherein the aerosol composition contains an acidic aqueous stock solution and a liquefied gas. The aerosol product according to claim 4, wherein the aerosol composition is one selected from an acidic hair dye, an oxidizing agent for a two-component hair dye, and an oxidizing agent for a permanent agent. The aerosol product according to claim 4, wherein the aerosol composition contains a penetration enhancer.

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