JPH0725725A - Expanding aerosol product for human body - Google Patents

Abstract

PURPOSE:To obtain an aerosol product cable of taking out uniform stock solution without violently shaking an aerosol can before using, jetting the stock solution as an almost unexpandable liquid material, directly applying to an part, providing excellent permeating power to skin and being fine in the resultant foam and having good feeling of use. CONSTITUTION:An aerosol composition containing (a) nitrogen as a compressed gas of propellant for aerosol or compressed air, (b) an aliphatic hydrocarbon such as pentane in the range of boiling point of 5-40 deg.C and (c) nonionic surfactant(s) having 8-20 HLB by a single product or plural combinations are packed in a sealing container capable of taking out and sprayed in mist state and foamed and applied to the face to be applied of a human body or foamed after the application. An operating button has a control mechanism for keeping a spraying amount in specific amount even when pressure in the sealed container is lowered and a lock mechanism for closing a jetting port of the operating button when the composition is not jetted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerosol product filled with a composition which is sprayed in the form of a mist using only compressed gas to be applied on the human body such as hair and skin and foams on the coated surface.

[0002]

2. Description of the Related Art In hair cosmetics such as hair styling agents, shaving foams, skin cosmetics, and anti-inflammatory analgesics for external use, it has been common practice to fill aerosol cans with propellants into aerosol products. Therefore, foam type aerosol products are also known. For example, a foaming hair styling agent of a type generally called a hair foam uses a liquefied gas such as liquefied petroleum gas (LPG) or dimethyl ether (DME) gas as a propellant, a surfactant as a foaming agent, and It is for foaming an aqueous stock solution containing a surfactant. However, in hair foam, the liquefied gas and the aqueous undiluted solution are separated in the aerosol can, so it is necessary to shake the aerosol can violently before use, and it is necessary to apply it to the hair after taking it once on the palm. There is. Therefore, it is not preferable in terms of usability, and the hands are sticky, and it is necessary to wash the hands with water after use.

Further, an aerosol product which can be directly applied to hair is also known and is called a hair mist foam or the like. Hair mist foam is also LPG, DM as propellant
Liquefied gas such as E gas is used as a propellant, and as with hair foam, the aerosol can is vigorously shaken before use to disperse the liquefied gas in the water phase to form an emulsion, which is pumped up with a dip tube and directly applied to the hair. Can be sprayed. However, this hair mist foam only begins to adhere to the surface of the hair because foaming starts immediately when it is released from the aerosol can into the atmosphere. Therefore, various investigations have been made to improve the permeability by devising a spray pattern.
There are many issues to be solved in terms of product value, such as mist. Further, as a characteristic of the liquefied gas, a decrease in internal pressure at a low temperature is unavoidable, which further deteriorates the atomized state, and it is unavoidable that a coarse mist or stream-like injection form is formed instead of mist. Further, usability problems such as violent shaking before use and safety problems such as flammability have not been solved at all.

On the other hand, it has also been proposed to use a compressed gas such as carbon dioxide gas or nitrogen gas which does not pose a problem to the global environment or the risk of ignition as a propellant for aerosol products. Foaming mist aerosols using carbon dioxide as a propellant are well known, because carbon dioxide is relatively soluble in compressed gas and the foaming principle is similar to liquefied gas. However, nitrogen and compressed air were hardly dissolved and foaming was difficult. Also, JP-A-62-3311
No. 5 publication reports a spray composition for human body application in which a compressed gas is mixed with n-pentane or isopentane. However, this aerosol composition is intended to obtain a refreshing sensation due to evaporation of pentane on the skin, and is technically different from the invention of the present application intended to foam on the human body.

Further, in an aerosol product using a compressed gas such as nitrogen gas or compressed air as a propellant, the space occupied by the compressed gas becomes large when the amount of the aerosol composition is reduced by the use, and the internal pressure is reduced accordingly. However, there is a problem in that the amount that can be taken out per unit time is reduced or that an injection failure occurs.

[0006]

The present invention does not require vigorous shaking, suppresses mist changes due to temperature changes, and is sprayed as a non-foaming liquid material as compared with liquefied gas and carbon dioxide gas, so that hair, scalp and skin The present invention provides an aerosol product which is applied to or foamed on or after foaming to form fine bubbles.

[0007]

The aerosol product of the present invention comprises (a) nitrogen as a compressed gas of an aerosol propellant, compressed air, and (b) an aliphatic hydrocarbon having a boiling point in the range of 5 to 40 ° C. , (C) An aerosol composition containing a nonionic surfactant having an HLB range of 8 to 20 as a single product or a combination of a plurality of products is filled in a removable hermetically-sealed container, and the composition is sprayed in a mist form to a human body. It is characterized in that foaming is applied to the application surface or foaming is performed after application.

Further, even when the pressure in the sealed container is lowered, the aerosol composition is placed in a sealed container having an operating button equipped with an adjusting mechanism for keeping the spray amount at a predetermined amount through a valve member. By filling, even if the amount of the aerosol composition is reduced by use and the space volume occupied by the compressed gas is increased to lower the pressure in the container, a predetermined amount of injection can be maintained.

Further, if a lock mechanism for closing the injection port of the operation button during non-injection is provided, the aerosol composition remaining in the flow path of the operation button foams after the injection and the liquid drops from the injection port to the outside. Is prevented.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The aerosol product of the present invention comprises an aerosol composition filled in a hermetically sealed container, and examples of the aerosol container include, for example, a pressure-resistant container, a take-out valve for opening and closing the pressure-resistant container, and a take-out valve. A general aerosol container equipped with a dip tube connected to the valve for pumping the stock solution and an actuating button serving as an actuator for controlling the opening / closing of the take-out valve is used.

The aerosol composition comprises a stock solution and a propellant. In the present invention, a compressed gas such as nitrogen gas or compressed air is used as the propellant. It is suitable to fill the propellant in an amount such that the internal pressure of the aerosol container at 25 ° C. is ³ to 9.5 kg / cm ³ . As the undiluted solution, an aqueous composition based on water is preferable, and the aliphatic hydrocarbon of the present invention and a single or a combination of a plurality of HLB8 to 20 surfactants are blended, depending on the application. The components and compositions of can be used.

The aliphatic hydrocarbon as the component (b) used in the present invention has a boiling point in the range of 5 to 40 ° C., and n-pentane (boiling point 36.1 ° C.) and isopentane (boiling point 27.9).
C.) and neopentane (boiling point 9.5.degree. C.) are typical.
Component (b) has an aliphatic hydrocarbon content of 0.5 to 10 in the stock solution.
It is suitable to blend in a weight percentage, preferably 1.0 to
It is 5.0% by weight.

As the nonionic surfactant as the component (c), those having an HLB of 8 to 20 and preferably 9 to 11 as a single product or a combination of a plurality thereof are used. When a surfactant other than the above is used, it becomes difficult to uniformly disperse the aliphatic hydrocarbon such as pentanes in the stock solution, and the foaming characteristics, foam properties, foam breaking properties, etc. are deteriorated.

Examples of the nonionic surfactant as the component (c) include polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene-polyoxypropylene glycol, glycol, glycerin, sorbitol, mannitol, pentaerythritol and sucrose. Partial ester of polyhydric alcohol and fatty acid such as polyoxyethylene polyhydric alcohol fatty acid partial ester, polyoxyethylene fatty acid ester, polyglycerin fatty acid partial ester, polyoxyethylenated castor oil, triethanolamine fatty acid partial ester, fatty acid diethanolami And polyoxyethylene alkylamine. Further, a part of polyoxyethylene can be replaced with polyoxypropylene. HLB is the carbon chain length of the hydrophobic group, the number of hydrophilic groups (-O
It can be controlled by adjusting the H group, oxyethylene unit, etc.).

Specific nonionic surfactants include P
OE cetyl ether, POE / POP cetyl ether,
POE octyl phenyl ether, POE nonyl phenyl ether, POE POP glycol, POE glyceryl monooleate, POE sorbitan monostearate, POE monostearate, POE hydrogenated castor oil, P
OE oleyl amine etc. are mentioned. Here, POE is polyoxyethylene and POP is polyoxypropylene. The surfactant as the component (c) is contained in the stock solution in an amount of 0.1 to 0.1
It is preferable to add 10% by weight, preferably 1.0
~ 5.0 wt%.

The stock solution components other than the above-mentioned components (b) and (c) are appropriately selected and blended according to the intended use. For example, in the case of a hair cosmetic composition, a hair styling agent, a moisturizing agent, a preservative, an antioxidant, and a pH. A regulator, ethanol, water, etc. are added. When using as an anti-inflammatory analgesic external preparation, an anti-inflammatory analgesic, a solvent,
Various absorption agents such as absorption promoters and dissolution aids, and water are mixed.
Furthermore, a viscosity reducing agent, a thickening agent, a gelling agent, etc. may be added to adjust the viscosity or gelate.

FIG. 1 is a sectional view showing an example of the operation button used in the present invention. Built-in normal take-out member,
The stem 13 of the valve member projects from the fitted mounting cap 11, and the operation button 2 is attached to the stem 13.
The mounting piece 35 of No. 1 is attached. In the button body 23 of the operation button 21, a cage 25 is vertically provided in the hollow central portion thereof. The cage 25 is provided with a plurality of coaxial coaxial holes having different diameters, and the maximum diameter portion is fitted to the mounting piece 35. A large-diameter portion 27, a medium-diameter portion 29 formed in the cage 25,
The small diameter portion 31 connects the opening 33 communicating with the injection nozzle and the stem 13 to form a flow path of the aerosol composition. A differential piston 41 is disposed in this flow path so that it can be biased to the upstream side (stem 13 side) by a spring 51. The differential piston 41 has a chamber 41 on the downstream side, and a flow path adjusting projection 45 is projected on the upstream side. Also, the spring 51 is compressed almost to the end,
In order to ensure a flow path even when it becomes difficult for the aerosol composition to pass between the winding coils of the spring 51,
The differential piston 41 is provided with a plurality of wing members 47, and the aerosol composition flows between the wing members 47.
Further, the shoulder 49 of the stepped portion of the wing member also functions as a receiver for the spring 51. Further, a cylindrical guide member 15 is fixed to the mining cap in order to prevent shaking when the operation button 21 is pushed down.

FIG. 1 shows a state in which the operation button 21 is pushed down to open the take-out valve of the aerosol container, and the aerosol composition is introduced and ejected from the stem 13.
It shows the initial state of use of the aerosol product, that is, the case where the internal pressure of the aerosol container is high. The differential piston 41 compresses and pushes up the spring 51 by the pressure of the aerosol composition flowing into the large diameter portion 27, and the pressure and the restoring force of the spring 51 are balanced in a predetermined state.
The flow rate adjusting projection 45 of the working piston 41 penetrates deeply into the small diameter portion 31, and the flow path of the aerosol composition is narrowed. When the internal pressure of the aerosol container decreases as the aerosol product is used, the restoring force of the spring 51 becomes larger than the pressure of the aerosol composition flowing into the large diameter portion 27, and the differential piston 41 responds to this decrease in pressure. Is pushed down. As a result, the depth of penetration of the flow rate adjusting projection 45 into the small diameter portion 31 becomes shallow to open the flow path, and a predetermined amount of the aerosol composition is guided to the opening 33 even with a small pressure,
The injection amount from the injection nozzle 53 within a constant time is kept constant. Details of the operation button shown in FIG. 1 and its modification are described in Japanese Patent Publication No. 59-502061.

FIG. 2 is a sectional view showing another embodiment of the operation button used in the present invention. In the operation button 61, a mounting piece 83 is connected to a button body 63, and an intake opening 91 thereof is connected to a stem (not shown) of the aerosol container. An inner wall member 65 is fitted in the button body 63, and is partitioned by the diaphragm 71 and the valve body portion 75, so that the introduction chamber 93, the injection chamber 95, and the injection port 99.
Is formed. The diaphragm 71 is made of a flexible member and can be contracted / compressed in the left-right direction in FIG. The diaphragm 71 includes a valve member base portion 73 and a valve body portion 7.
5 and the valve tip portion 79 are integrally molded.

FIG. 2 shows a state in which the operation button 61 is pushed down to open the valve for taking out the aerosol container, and the aerosol composition is introduced and ejected from the stem. The initial state of use of the aerosol product, that is, the aerosol container is shown. It shows the case where the internal pressure of is high. Due to the pressure of the aerosol composition flowing into the intake opening 91, the diaphragm 7
1 is pushed to the left and balances with the biasing force of the spring 81. The aerosol composition has a control flow path 97 formed at a narrow interval between the inner wall member taper portion 67 and the valve body taper portion 77.
Through which it flows into the injection chamber 95 and is injected from the injection port 99.

When the internal pressure of the aerosol container decreases as the aerosol product is used, the restoring force of the spring 81 becomes larger than the pressure of the aerosol composition flowing into the introducing chamber 93, and the day diaphragm 7 is reduced in accordance with the decrease in the pressure.
1 expands, the valve body 77 formed integrally with the valve 1 moves to the right, and the inner wall member taper portion 67 and the valve body taper 7
The space between the control passages 7 and 7 becomes wider, and a wider regulation flow channel 97 is formed. As a result, even when the internal pressure of the aerosol container is lowered, a predetermined amount of the aerosol composition is guided to the injection chamber 95, and the injection amount from the injection port 99 within a constant time is kept constant.

When the actuating button 61 is made free and the supply of the aerosol composition from the aerosol container is stopped, the pressure in the introduction chamber 93 is greatly reduced and the spring 8
Due to the restoring force of 1, the diaphragm 71 expands and moves to the right, and the tip of the valve tip 79 closes the injection port 99. Therefore, the aerosol composition remaining in the injection chamber 95 after the end of injection does not drip. In particular, the aerosol composition of the present invention is of a foaming type, and when foamed, it easily overflows, but since the injection port 99 is blocked, this is not a concern.

Details of the operation button shown in FIG. 2 and its modification are described in detail in WO91 / 03408, US Pat. No. 5,186,201 and the like. The operation button usable in the present invention is described in JP-A-54-
No. 59613 and Japanese Patent Publication No. 63-500447.

[0024]

EFFECT OF THE INVENTION In the aerosol product of the present invention, an aliphatic hydrocarbon such as pentane is solubilized in an aqueous stock solution by a nonionic surfactant having an HLB of 8 to 20 as a single product or a combination of a plurality of products to disperse it substantially uniformly. You can Therefore, even if the aerosol can is not vigorously shaken before use, a uniform undiluted solution can be taken out, the aerosol can can be used upright or upside down, and the undiluted solution can be directly sprayed to the application site.

Further, since a compressed gas which is substantially insoluble in the stock solution is used as a propellant, and the aliphatic hydrocarbons are hard to vaporize only by being taken out into the atmosphere, the stock solution is a substantially non-foaming liquid substance. It is jetted and directly applied to the application site. Therefore, unlike foam made of liquefied gas such as LPG or DME, or carbon dioxide gas, effects such as permeability can be enhanced.

The stock solution is heated by the body temperature on the application site to vaporize the aliphatic hydrocarbon such as pentane, and the nonionic surfactant of HLB 8 to 20 contained therein acts to foam the stock solution. Due to the foaming power at the time of foaming, excellent penetrating power to the scalp and skin is obtained, and the obtained foam is fine and has a good feeling in use. Further, the spray mist at a low temperature is good as well as room temperature, and the foamability is post-foaming as compared with room temperature, but there is no difference in the formed foam. Further, since it has an appropriate foam breaking property, it is suitable for hair mist foam and the like because it defoams when lightly smoothed by hand.
When applied as a shaving cream or the like, fatty acid soap or the like may be blended to enhance foamability and foam stability.

Further, even when nitrogen gas or compressed air is used as a propellant, by using a top button having an adjusting mechanism for keeping the spray amount at a predetermined value even when the pressure in the sealed container drops, There is no change in the spray amount per unit time. Further, by closing the injection port of the operation button during non-spraying, it is possible to prevent the aerosol composition remaining in the operation button from foaming and dripping.

[0028]

【Example】

Example 1 A stock solution having the composition shown in Table 1 was prepared, enclosed in an aerosol can, and pressurized to 7 kg / cm ² with nitrogen gas to produce a hair mist foam of the present invention.

[0029]

[Table 1] Table 1: Composition of Hair Mist Foam Composition: Yuka Former R205S (manufactured by Diachemco) 3.0wt% BC5.5 (manufactured by Nikko Chemicals) 2.5wt% Cetyltrimethylammonium chloride 0.1wt% SH3746 (manufactured by Toray Dow) 0.3wt% % Ethanol 20.0wt% Perfume Trace amount Purified water Balance Isopentane 3.5wt% 100wt % Nitrogen gas Pressurized to 7kg / cm ² Yukaforma R205S: N-methacryloylethyl-
N, N-dimethylammonium / α-N-methylcarboxybetaine butyl methacrylate copolymer BC5.5: POE (5.5) cetyl ether, HLB
= 10.5 SH3746: Dimethylsiloxane / methyl (POE)
Siloxane copolymer

When this hair mist foam was sprayed directly on the hair from the aerosol can without shaking the aerosol can, it was applied in a non-foaming state, had good permeability, and then foamed to form fine bubbles. When the foam was smoothed with a palm, the foam disappeared promptly.

Example 2 A stock solution having the composition shown in Table 2 was prepared, enclosed in an aerosol can, and pressurized with nitrogen gas to 7 kg / cm ² to prepare a shaving foam of the present invention.

[0032]

[Table 2] Table 2: Composition of Shaving Foam Composition: Stearic acid 7.0 wt% Myristic acid 3.0 wt% Glycerin 4.0 wt% POE (5) Glyceryl monooleate * ¹ 1.6 wt% POE (15) Glyceryl monooleate * ¹ 0.4 wt% triethanolamine 4.0 wt% l-menthol qs paraben qs perfume qs purified water balance isopentane 4.0 wt% 100 wt% of nitrogen gas 7 kg / cm ² in pressure * 1) POE (5) glyceryl monooleate and PO
The HLB of the nonionic surfactant as a mixture with E (15) glyceryl monooleate is 10.5.

When this shaving foam was sprayed directly onto the face from the aerosol can without shaking the aerosol can, a good foaming coating was obtained.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an operation button used in the present invention.

FIG. 2 is a cross-sectional view showing an embodiment of an operation button used in the present invention.

[Explanation of symbols]

 11 Mounting Cap 13 Stem 15 Guide Member 21 Operation Button 23 Button Body 25 Cage 27 Large Diameter Part 29 Medium Diameter Part 31 Small Diameter Part 33 Opening 35 Mounting Piece 41 Differential Piston 43 Chamber 45 Flow Rate Adjusting Protrusion 47 Wing Member 49 Shoulder of Step 51 Spring 53 Injection Nozzle 61 Operation Button 63 Button Main Body 65 Inner Wall Member 67 Inner Wall Member Tapered Section 69 Spring Cover 71 Diaphragm 73 Valve Member Base 75 Valve Main Body 77 Valve Main Body Tapered 79 Valve Tip 81 Spring 91 Intake Opening 93 Introduction chamber 95 Injection chamber 97 Restricted flow path 99 Injection port

Claims (3)

[Claims] 1. (a) Nitrogen or compressed air as a compressed gas for an aerosol propellant, (b) an aliphatic hydrocarbon having a boiling point in the range of 5 to 40 ° C., (c) a single or a combination of a plurality of HLBs. The aerosol composition containing the nonionic surfactant in the range of 8 to 20 is filled in a removable hermetically sealed container, the composition is sprayed in the form of mist, and foam-applied to a human body application surface, or after application. A foaming type aerosol product for the human body, which is characterized by foaming. 2. The aerosol composition is placed in a sealed container having an operation button equipped with a valve member for maintaining an amount of spray to a predetermined amount even when the pressure in the sealed container drops. The foamable human body aerosol product according to claim 1, which is filled. 3. The foamed human body aerosol product according to claim 2, wherein the actuation button has a lock mechanism that closes an injection port of the actuation button when not injecting.