HK1211314B - Cleaning agent for car air conditioner and aerosol container for cleaning car air conditioner filled with same - Google Patents

Description

Cleaning agent for automobile air conditioner and aerosol container filled with same for cleaning automobile air conditioner

Technical Field

The present invention relates to a cleaning agent for an automobile air conditioner and an aerosol container for cleaning an automobile air conditioner filled with the same, and more particularly, to a cleaning agent for an automobile air conditioner which exhibits an excellent deodorizing effect and a good rust-preventing effect without impairing safety and has a long-term antibacterial effect and is capable of being safely and efficiently spray-cleaned, and an aerosol container for cleaning an automobile air conditioner, which is efficiently adsorbed to a metal material such as aluminum, aluminum-based alloy, magnesium-based alloy, or iron-based alloy, or a hydrophilic coating material such as polyacrylamide or nylon coated on the metal material.

Background

The evaporator constituting the circuit of the air conditioner for an automobile is composed of a fin material including a plurality of layers of a metal material such as aluminum as a base material. In order to suppress the generation of water droplets, the surface of the heat sink material is subjected to a surface treatment with a hydrophilic coating material made of a hydrophilic resin such as polyacrylamide or nylon. However, since the hydrophilic coating material is likely to fall off from the fin material with the passage of time, cells of mold and the like passing through the filter are likely to propagate in the evaporator, and thus propagation is caused, and odor such as cigarette odor is removed and secondary odor is also generated.

Therefore, a cleaning agent for an automobile air conditioner is desired which can be strongly adsorbed on a metal material constituting an evaporator or a base material of a hydrophilic coating material, and which remains to compensate for a deteriorated coating, regardless of the presence or absence of the coating, and exhibits an antibacterial and deodorizing effect for a long period of time.

On the other hand, conventionally, spray gun type and mousse type cleaning agents have been known as cleaning agents for automobile air conditioners, and they can be selected and used appropriately according to the place of use and the purpose of use.

For example, the spray gun type is used in order to insert a gun into an automobile air conditioner and spray a cleaning agent to clean the interior of the air conditioner, particularly an evaporator, and perform antibacterial and deodorizing treatments (see patent document 1), but the work of inserting the gun into the automobile air conditioner and directly cleaning the evaporator involves the attachment and detachment of structural parts such as an inner panel, and therefore has a drawback that a very skilled technique is required.

On the other hand, the mousse-like form, when treated therewith, has the following advantages: the chemical is in the form of foam and is directly distributed in the air conditioner circuit of the automobile, and not only the evaporator but also peripheral equipment thereof are cleaned efficiently, but the foam invades into a driving part of the blower unit, for example, a motor, so that there are disadvantages that an electric system failure such as a short circuit occurs, the cleaning operation is stopped, and the motor is rusted and deteriorated.

In addition, the following methods are also disclosed: a method of dispersing an antibacterial and antifungal agent in a solvent mainly composed of water using an alkali metal salt of a fatty acid having a tertiary carboxyl group and having 8 or more carbon atoms as a dispersant, and spraying the obtained stock solution onto an air conditioner circuit to adhere the solution (see patent document 2); a method of mixing 5 to 20 wt% of an organic nitrogen sulfur-based antibacterial and antifungal agent, 0.1 to 7 wt% of a rust preventive agent, 1 to 10 wt% of a surfactant, and 5 to 20 wt% of a solvent with respect to an aqueous deodorant stock solution to prepare a deodorant stock solution for an air conditioner, diluting the deodorant stock solution with water, spraying the diluted stock solution into an air circuit of an automotive room air conditioner, and deodorizing by suppressing bacteria and molds adhering to an evaporator portion (see patent document 1); an automobile air conditioner cleaning agent comprising 90 to 70 mass% of a stock solution containing 0.01 to 5 mass% of an organic antibacterial and antifungal agent, 0.01 to 5 mass% of a deodorant comprising a mixture of an organic carboxylic acid or a salt thereof and a natural extract, 0.01 to 5 mass% of a rust preventive, and 0.1 to 10 mass% of a surfactant, and 10 to 30 mass% of dimethyl ether as a propellant (see patent document 3).

However, the above-mentioned cleaning agent or antibacterial/deodorant for an automobile air conditioner is not said to be satisfactory as a cleaning agent for an automobile air conditioner because the rust-proofing effect is lowered when the cleaning agent or antibacterial/deodorant is formulated so as to place importance on the cleaning effect or the antibacterial/antifungal effect, and the cleaning effect or antibacterial/antifungal effect is lowered when the cleaning agent or antibacterial/deodorant for an automobile air conditioner is formulated so as to place importance on the rust-proofing effect.

Under the above circumstances, the present inventors have first found that halogen is a cause of rust generation, and have disclosed a cleaning agent for an automobile air conditioner, which comprises a cleaning agent stock solution prepared by dissolving the following components in an alcoholic organic solvent at a predetermined ratio: an antibacterial and antifungal agent such as a di-long-chain alkyl di-short-chain alkyl ammonium carboxylate, a natural extract as a deodorant, a halogen-free organic rust inhibitor as a rust inhibitor, and a halogen-free nonionic surfactant as a cleaning component (see patent document 4).

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 9-108311 (claims and other parts)

Patent document 2: japanese laid-open patent publication No. 3-146063 (claims and other parts)

Patent document 3: japanese patent laid-open publication No. 2003-261900 (claims and other parts)

Patent document 4: japanese laid-open patent publication No. 2010-138295 (claims and other parts)

Disclosure of Invention

Problems to be solved by the invention

Although the cleaning agent for an automobile air conditioner described in patent document 4 can exhibit cleaning, antibacterial and antifungal effects and rust-proofing effects at the same time, and has achieved unprecedented success, further improvement of the effects, particularly persistence of the effects, is desired at present.

Accordingly, an object of the present invention is to provide a detergent for an automobile air conditioner, which overcomes the above-mentioned disadvantages of conventional detergents for an automobile air conditioner, has excellent detergency, antibacterial and antifungal properties, and deodorant properties, and exhibits excellent rust-proofing properties, thereby stably exhibiting effects for a longer period of time than conventional detergents without impairing the functions of driving parts such as motors of evaporators and blower units.

Another object of the present invention is to provide an aerosol container for cleaning an air conditioner for a vehicle, which can be filled with the cleaning agent for a vehicle air conditioner and can be stably and efficiently spray-cleaned.

Means for solving the problems

The present inventors have conducted various studies on a cleaning agent for an automobile air conditioner in order to make it more difficult for an active ingredient of the cleaning agent strongly adsorbed on a surface treatment material to flow out by the generation of water droplets, and as a result, have found that by blending a quaternary ammonium carbonate as an antibacterial and antifungal agent and a fatty acid compound as an antirust agent, a fatty acid reacts with the quaternary ammonium carbonate as a counter ion and is more strongly adsorbed on the surface treatment material as a new substance, and thus the effects can be maintained for a long period of time without impairing many of the effects expected of the cleaning agent for an automobile air conditioner, and have completed the present invention based on this finding.

That is, the present invention provides a cleaning agent for an automobile air conditioner, which is obtained by pressing a spraying agent into a cleaning agent stock solution and adjusting the spraying pressure to 0.6 to 0.9MPa, wherein the cleaning agent stock solution contains: (A) 0.1 to 5.0 mass% of an organic antibacterial and antifungal agent containing quaternary ammonium carbonate, (B) 0.01 to 5.0 mass% of a deodorant containing a natural extract, (C) 0.1 to 5.0 mass% of an antirust agent containing a fatty acid compound, (D) 0.1 to 10.0 mass% of a surfactant, and (E) 70 to 99 mass% of an alcoholic organic solvent.

Further, the present invention provides an aerosol container for cleaning an automobile air conditioner, filled with the cleaning agent for an automobile air conditioner, wherein the aperture of the outlet is 0.4mm or less.

ADVANTAGEOUS EFFECTS OF INVENTION

The invention provides a cleaning agent for an automobile air conditioner, which can effectively clean the pollution of the automobile air conditioner, and endows the parts such as an evaporator generating condensation in the automobile air conditioner with antibacterial and anti-mildew properties, thereby eliminating the foul smell such as cigarette odor and inhibiting the generation of the foul smell caused by the propagation of microorganisms for a long time. Also disclosed is an aerosol container for cleaning an air conditioner for a vehicle, which can be filled with the cleaning agent for a vehicle air conditioner and can be safely and efficiently spray-cleaned.

Detailed Description

In the cleaning agent of the present invention, as the organic antibacterial and antifungal agent used as the component (a), it is considered that the organic antibacterial and antifungal agent has adsorbability to a base material itself such as a metal material or a surface-coated resin material constituting an air conditioner, and it is necessary to use a substance having carbonate ions as counter ions in view of adsorption to a hydrophilic coating film which is a quaternary ammonium salt compound and influence on metal parts in an air conditioner circuit or metal parts of an aerosol container. Among them, it is preferable to use a di-long-chain alkyl di-short-chain alkyl ammonium carbonate in view of reactivity with a fatty acid used as a rust preventive described later and substitution as a counter ion.

The long-chain alkyl group is preferably an alkyl group having 8 to 12 carbon atoms, and the short-chain alkyl group is preferably an alkyl group having 1 to 3 carbon atoms.

Didecyldimethylammonium carbonate is particularly preferred as component (A).

The component (A) of the present invention may be used alone or in combination of 2 or more.

In the cleaning agent for an automobile air conditioner of the present invention, in order to enhance the sterilization effect when the cleaning agent is applied, an isothiazoline compound, for example, 2-methyl-4-isothiazolin-3-one, 2-N-octyl-4-isothiazolin-3-one, 1, 2-benzisothiazolin-3-one, N-butyl-1, 2-benzisothiazolin-3-one, or the like, an amino acid having an amino group or a carboxyl group in the molecule, for example, sodium alkylbis (aminoethyl) glycinate, sodium dodecylaminopropionate, or other organic antibacterial and antifungal agents can be used in combination as the component (A'). In order to prevent the outflow of the detergent stock solution by the generation of water droplets as much as possible, isothiazoline compounds which are less soluble in water, particularly 2-N-octyl-4-isothiazolin-3-one, 1, 2-benzisothiazolin-3-one and N-N-butyl-1, 2-benzisothiazolin-3-one, are preferably used. These may be used alone, or 2 or more of them may be used in combination.

Next, in the cleaning agent for an automobile air conditioner of the present invention, as the component (B), a deodorant containing a natural extract can be used in order to efficiently deodorize when the cleaning agent is applied, or to efficiently suppress odor during microbial growth, cigarette odor, resin odor generated from parts, and other odors. The natural extract is preferably an extract containing polyphenol such as persimmon, tea, or bamboo. These may be used alone, or 2 or more of them may be used in combination. In addition, in order to enhance the deodorizing ability of the component (B), a graft polymer type deodorant obtained by polymerizing a compound having a functional group directly reactive with an odor-generating substance such as ammonia, acetaldehyde, or various fatty acids, such as a product manufactured by Grafton, trade name "Grafton", may be used in combination.

In the cleaning agent for an automobile air conditioner of the present invention, it is necessary to use an organic rust inhibitor as the component (C). In view of reactivity with the quaternary ammonium carbonate used as the component (a), a fatty acid compound such as a monocarboxylic acid or a dicarboxylic acid is used. Among these, in order to prevent the outflow of the cleaning agent stock solution due to the generation of water droplets as much as possible, it is preferable to use a dicarboxylic acid compound which also has an anticorrosive effect on air conditioner parts or aerosol metal containers. Further, as the fatty acid-series compound, a fatty acid-series compound having 10 to 36 carbon atoms is more preferably used.

Examples of these include: sebacic acid, DiACID1550[ main component: 5-carboxy-4-hexyl-2-cyclohexenyl-1-octanoic acid or 6-carboxy-4-hexyl-2-cyclohexenyl-1-octanoic acid; mead Westvaco Corp. System]IPU-22 (main component: C)₁₂～C₂₂A dibasic acid; manufactured by roughur essential oil corporation), sanhibiotor 102 (main component: alkenyl succinic acid; manufactured by Sanyo chemical Co., Ltd.), dodecanedioic acid, eicosanedioic acid, isodocosanedioic acid, and isoeicosanedioic acidEnedioic acid, butyloctanedioic acid, dialkoxycarbonyl-isodocosanedioic acid, etc., of which DiACID1550 and sanlibitor 102 are particularly preferable. These may be used alone, or in combination of 2 or more.

In the present invention, as the component (C'), organic rust inhibitors other than the above-mentioned ones, for example, benzotriazole-based, ammonium salt-based, p-tert-butylbenzoic acid, and the like, are also used. Among them, benzotriazole, dicyclohexylamine nitrite and diisopropylamine nitrite are particularly preferable. These may be used alone, or 2 or more kinds may be mixed and used.

As the organic rust-preventive component usable in the present invention, it is more preferable to use the above-mentioned dicarboxylic acid compound or a mixture thereof with either or both of benzotriazole and diisopropylamine nitrite.

The cleaning agent for an automobile air conditioner of the present invention requires the use of a cleaning component, and the surfactant as the component (D) is used so that the cleaning agent can be stably dissolved when prepared into a solution, and when the cleaning agent is suitably applied to an evaporator or other solid surface, the cleaning agent can be cleaned without damaging the surface to be treated. As the surfactant, a nonionic surfactant having an excellent solubilizing and cleaning effect is preferably used.

Examples of such nonionic surfactants include: polyoxyethylene alkyl ethers, alkylamine oxirane compounds, alkyldiethanolamides, polyoxyethylene sorbitan fatty acid esters, fatty acid polyoxyethylene methyl ethers, alkyldimethylamine oxides, and the like. These may be used alone, or 2 or more kinds may be mixed and used. Among them, polyoxyethylene alkyl ethers, fatty acid polyoxyethylene methyl ethers, and alkyldimethylamine oxides are preferable, but alkyldimethylamine oxides are particularly preferable from the viewpoint of imparting bactericidal properties even when a cleaning agent is used.

On the other hand, since the air conditioner for a vehicle is generally complicated in structure and the filter to be detachably attached is disposed above the blower, it is necessary to efficiently supply the chemical to the evaporator portion to be cleaned, to remove fine dirt due to spores of microorganisms or smoke of cigarettes while taking care not to adversely affect the electronic components attached to the periphery of the blower, and to efficiently attach the active ingredient in the cleaning agent to the application portion in the circuit of the air conditioner. Therefore, in the cleaning agent for an automobile air conditioner of the present invention, it is necessary to use an organic solvent, particularly an alcohol-type organic solvent which is easily volatilized, as the component (E).

The alcoholic organic solvent may be at least one selected from alcohols and glycols. Among them, a lower alcoholic organic solvent having 2 to 5 carbon atoms for dissolving and dispersing the above components is preferable. As the lower alcoholic organic solvent, a lower alcohol such as ethanol, n-propanol, and isopropanol, or ethylene glycol methyl ether is used, but ethanol is particularly preferable in that it has good dispersibility in each component, is less toxic to the human body, and is easily volatilized.

In the cleaning agent for an automobile air conditioner of the present invention, it is also an important condition to select the mixing ratio of the above-mentioned components (a) to (E) within a specific range in order to ensure sufficient cleaning power, and to exert excellent antibacterial and antifungal effects and deodorizing effects over a long period of time, thereby maintaining excellent rust resistance.

That is, the mixing ratio is selected from the range of 0.1 to 5.0 mass%, preferably 0.3 to 3.0 mass%, of the component (A), the range of 0.01 to 5.0 mass%, preferably 0.05 to 2.0 mass%, of the component (B), the range of 0.1 to 5.0 mass%, preferably 0.3 to 2 mass%, of the component (C), the range of 0.1 to 10.0 mass%, preferably 2.0 to 5.0 mass%, of the component (D), and the range of 70 to 99 mass%, of the component (E), based on the total amount of the cleaning agent stock solution.

When the component (A ') and the component (C') are further blended as necessary, they may be selected from the ranges of 0.01 to 1.5% by mass and 0.01 to 1.5% by mass, respectively, based on the total amount of the stock solution of the cleaning agent.

If the component (A) is less than 0.1% by mass, the antibacterial and antifungal effects are insufficient, and if it is more than 5% by mass, the stock solution of the cleaning agent itself is unstable and a solid component is precipitated, so that when it is used as an aerosol, not only is it impossible to spray it, but also the amount of the liquid adhering after spraying may be excessive, and the air conditioner part may be adversely affected.

If the amount of the component (B) is less than 0.01% by mass, the deodorizing effect is insufficient, and if it is more than 5.0% by mass, the stock solution of the cleaning agent itself is poor in stability, and aerosol spray is hindered by deposition of solid components.

If the amount of the component (C) is less than 0.1% by mass, the rust preventive effect is insufficient, and the base material of the air conditioner cannot be sufficiently protected, and if the amount is more than 5.0% by mass, the stability of the cleaning agent stock solution itself cannot be ensured, and the ejection failure due to the precipitation of solid components may occur.

When the component (C ') is used in combination with the component (C), the mixing ratio of the component (C) and the component (C') is preferably 1: 1-5: 1, in the above range.

If the surfactant of component (D) is less than 0.1% by mass, the stability of the stock solution of the cleaning agent is impaired, and the cleaning agent is easily separated, resulting in a decrease in cleaning power, whereas if it is more than 10.0% by mass, the cleaning agent adversely affects the base material of the air conditioner.

If the alcoholic organic solvent of component (E) is less than 70 mass%, the drying property of the cleaning agent stock solution is lost, which may affect the air conditioner electronic components, and the mist of the aerosol becomes coarse, which may decrease the reaching rate to the evaporator. If the content is more than 99% by mass, the stability of the cleaning agent stock solution itself cannot be ensured, and the solid component may precipitate to inhibit the aerosol from being ejected.

In the cleaning agent for an automobile air conditioner of the present invention, in addition to the components (a) and (E), a hydrophilic coating forming agent may be added in an amount of 0.05 to 1% by mass as the component (F) to assist the fixation of the active ingredient of the cleaning agent to the treated surface of the air conditioner base material after drying.

As the hydrophilic coating film forming agent, polyvinyl alcohol, polyvinyl pyrrolidone, polyacrylamide, a naphthalenesulfonic acid formaldehyde condensate, a polyether polyol urethane polymer, for example, a product name "ADEKA NOL UH-140S" (manufactured by ADEKA Co., Ltd.) or the like is used. These may be used alone, or 2 or more kinds may be mixed and used.

In the cleaning agent stock solution of the present invention, it is preferable to use a substance containing no halogen in each component in order to secure rust prevention.

In the cleaning agent for an automobile air conditioner of the present invention, first, the components (A) to (D) and, if necessary, (F) are dissolved in an alcoholic organic solvent of the component (E), and a cleaning agent stock solution having a solid content concentration of 1 to 30 mass% is prepared. The cleaning agent stock solution thus prepared is charged with a propellant, the propellant pressure is adjusted to 0.6 to 0.9MPa, and the mixture is filled into a spray-type aerosol container. If the spray pressure is lower than this, a fine spray cannot be formed, and if it is higher than this, the spray may be broken, which is dangerous.

The propellant for ejecting the stock solution of the cleaning agent includes a gas or a substance that is gaseous at the time of application, for example, air, dimethyl ether, LPG, LNG, nitrogen, carbon dioxide, nitrous oxide, argon, helium, and the like, and among them, nitrogen is preferable from the viewpoint of solubility in an alcoholic organic solvent and safety.

The aperture of the outlet of the aerosol container used in the present invention is 0.4mm or less, preferably selected from the range of 0.1 to 0.3 mm.

In order to make the spray finer, a flexible narrow tube may be attached to the outlet of the aerosol container. In this case, the diameter of the discharge port of the narrow tube is selected from the range of 0.4mm or less, preferably 0.1 to 0.3 mm.

Thus, the sprayed mist can reach the evaporator by the air supply of the air conditioner.

Examples

The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.

(test examples 1 to 4)

Each sample solution of the formulation (parts by mass) shown in Table 1 was applied to an aluminum test plate (10X 25mm), dried, immersed in 100ml of water, and allowed to stand for the following time. Thereafter, each of the test plates obtained was taken out and, after drying, placed in the center of a common agar medium (previously coated with Bacillus subtilis) prepared in a 90 mm-diameter petri dish. After culturing at 25 ℃ for 3 days, the antimicrobial durability of the combination of the antimicrobial and antifungal agents and the rust preventive agent was evaluated on the basis of the diameter of the antibacterial ring as follows. The results are shown in Table 2.

○ mm above 15mm

△ mm is more than 10mm and less than 15mm

X: less than 10mm

[ Table 1]

DiACID 1550: mead Westvaco Corp. the main component of 5-carboxy-4-hexyl-2-cyclohexenyl-1-octanoic acid or 6-carboxy-4-hexyl-2-cyclohexenyl-1-octanoic acid

SANHIBITOR 102: alkenyl succinic acid as main ingredient, manufactured by Sanyo chemical Co., Ltd

[ Table 2]

Next, each sample liquid of examples and comparative examples was prepared. The physical properties of the examples and comparative examples were evaluated by the following methods.

(1) Stability of

The sample solutions were thoroughly mixed and placed in a refrigerator (about 4 ℃ C.), and after leaving for 2 weeks, they were evaluated by visual observation according to the following criteria.

○ the liquid was transparent, and no floating or precipitation of the precipitate could be seen.

X: the liquid was cloudy, and floating or precipitated precipitates were observed.

(2) Antibacterial persistence

Each sample solution was applied to a standard test plate (10X 25mm) of aluminum and 6-nylon, dried, and then placed in a salt water spray tester (manufactured by Suga tester) and allowed to stand for the following time. Thereafter, each of the above test plates was taken out, dried and placed in the center of a common agar medium (previously coated with Bacillus subtilis) prepared in a 90 mm-diameter petri dish. After 3 days of culture at 25 ℃, evaluation was made by the size of the diameter of the bacteriostatic ring on the following basis.

○ mm above 15mm

△ mm is more than 10mm and less than 15mm

X: less than 10mm

(3) Mildew resistance

Each sample solution was applied to a paper disk having a diameter of 8mm, and placed in the center of a potato dextrose agar medium (previously applied with Aspergillus niger) prepared in a petri dish having a diameter of 90 mm. After 3 days of culture at 25 ℃, evaluation was made by the size of the diameter of the bacteriostatic ring on the following basis.

○ mm above 15mm

△ mm is more than 10mm and less than 15mm

X: less than 10mm

(4) Deodorizing property

A malodor source (0.5% ammonia-ethanol solution 0.2cc) was placed in a beaker having a capacity of 5 liters in a desiccator, and after leaving for 30 minutes, the concentration was measured using a gas detection tube manufactured by Gastec corporation to prepare a control. Next, a lint (50X 50mm) impregnated with 0.5cc of each sample liquid was put into a dryer, and the odor concentration was measured in the same manner, and the difference from the control was defined as the deodorization ratio. At this time, the malodor source is not brought into contact with the sample liquid, and the volatile substances are caused to react with each other.

○ deodorant rate is above 70%

△ deodorant rate is more than 30% and less than 70%

X: the deodorization rate is lower than 30 percent

(5) Cleaning property

The cleaning rate was determined by mixing JIS test powders of 5 th and 7 th grades, grease, and carbon black to prepare artificial contaminated oil, applying the artificial contaminated oil on an aluminum test plate, performing full-scale spray cleaning using aerosol prepared by filling each sample liquid in a test container, and measuring the difference between the initial weight and the remaining weight applied to the test plate.

○ cleaning rate is above 40%

△ the cleaning rate is more than 20 percent and less than 40 percent

X: the cleaning rate is lower than 20 percent

(6) Rust resistance

The iron plate thus ground was immersed in each sample solution (such that the lower half of the entire iron plate was immersed in each sample solution), and the iron plate was left in a thermostatic bath at 50 ℃ for 1 week, and then observed for the presence or absence of rust on the appearance.

○ No rusting

△ partial rusting

X: rust on the whole surface of the plate

(7) Liquid accessibility

A blower unit and an evaporator unit of an automobile air conditioner mounted on an actual vehicle were connected, the suction surface of the evaporator was blocked with a paper sheet of B5 edition size (182X 257mm), each sample liquid was charged from a gas inlet in the blower unit, an aerosol in which nitrogen gas was injected as an injection agent was injected, the area of the sample liquid adhering to the paper sheet was measured, and the occupancy ratio thereof was evaluated in accordance with the following criteria.

○, more than 70 percent

△ the content of the active ingredients is more than 60 percent and less than 70 percent

X: less than 60 percent

Examples 1 to 4 and comparative examples 1 to 4

Stock solutions of the cleaning agents of the formulations (parts by mass) shown in table 3 were prepared, and their physical properties were evaluated. Next, the cleaning agent stock solution was filled, an aerosol in which nitrogen gas was injected as a propellant was prepared, and the liquid accessibility thereof was evaluated. The results are shown in tables 4 and 5.

[ Table 3]

DiACID 1550: mead Westvaco Corp. the main component of 5-carboxy-4-hexyl-2-cyclohexenyl-1-octanoic acid or 6-carboxy-4-hexyl-2-cyclohexenyl-1-octanoic acid

SANHIBITOR 102: alkenyl succinic acid as main ingredient, manufactured by Sanyo chemical Co., Ltd

Pancil: plant-based natural extract (persimmon oil tannin extract) produced by Rilis science and industries Co

The houttuynia cordata extract: plant-based natural extract (houttuynia cordata tea extract) produced by Kagawa spice society

[ Table 4]

[ Table 5]

Claims (16)

1. A cleaning agent for an automobile air conditioner is prepared by pressing a spraying agent into a cleaning agent stock solution and adjusting the spraying pressure to 0.6-0.9 MPa,

the cleaning agent stock solution contains: (A) 0.1 to 5.0 mass% of an organic antibacterial antifungal agent containing quaternary ammonium carbonate, (B) 0.01 to 5.0 mass% of a deodorant containing a natural extract, (C) 0.1 to 5.0 mass% of an antirust agent containing a fatty acid compound, (D) 0.1 to 10.0 mass% of a surfactant, (E) 70 to 99 mass% of an alcoholic organic solvent,

the fatty acid compound is monocarboxylic acid or dicarboxylic acid capable of reacting with quaternary ammonium carbonate.

2. The cleaning agent for an automobile air conditioner according to claim 1, wherein the quaternary ammonium carbonate is didecyldimethylammonium carbonate.

3. The detergent for an air conditioner, according to claim 1, further comprising an isothiazoline compound as an organic antibacterial and antifungal agent.

4. The cleaning agent for an automobile air conditioner as claimed in claim 1, wherein the natural extract is a natural extract containing polyphenol.

5. The cleaning agent for an automobile air conditioner according to claim 1, wherein the monocarboxylic acid or the dicarboxylic acid has 10 to 36 carbon atoms.

6. The cleaning agent for an automobile air conditioner according to claim 1, further comprising at least 1 kind selected from the group consisting of benzotriazole, dicyclohexylamine nitrite and diisopropylamine nitrite as a rust preventive.

7. The cleaning agent for an automobile air conditioner according to claim 1, wherein the surfactant is a nonionic surfactant.

8. The cleaning agent for an automobile air conditioner according to claim 1, wherein the alcoholic organic solvent is a lower alcohol having 2 to 5 carbon atoms.

9. The detergent for an automobile air conditioner as set forth in claim 1, wherein the spray-type aerosol container is filled with the detergent stock solution and the propellant under pressure.

10. The cleaning agent for an air conditioner in an automobile according to claim 1, wherein the propellant is nitrogen gas.

11. An aerosol container for cleaning an automobile air conditioner, which is filled with the cleaning agent for an automobile air conditioner according to any one of claims 1 to 10, wherein the diameter of the outlet aperture of the aerosol container is 0.4mm or less.

12. The aerosol container for cleaning an air conditioner in a vehicle according to claim 11, wherein a flexible narrow tube having a discharge port diameter of 0.4mm or less is additionally provided.

13. Use of an organic antibacterial and antifungal agent comprising a quaternary ammonium carbonate and a rust preventive agent comprising a fatty acid compound for producing a cleaning agent for an automobile air conditioner or an aerosol container for cleaning an automobile air conditioner.

14. Use according to claim 13, wherein the quaternary ammonium carbonate is didecyldimethylammonium carbonate.

15. Use according to claim 13 or 14, wherein the fatty acid-based compound is a monocarboxylic or dicarboxylic acid capable of reacting with the quaternary ammonium carbonate.

16. The use according to claim 15, wherein the monocarboxylic or dicarboxylic acid has a carbon number of 10 to 36.