Aerosol product

Abstract

To provide an aerosol product having sufficient cooling performance without using hydrofluoroolefin as a propellant.SOLUTION: An aerosol product comprising an aerosol composition containing not less than 40vol% of at least one propellant selected from the group consisting of dimethyl ether and liquefied petroleum gas, an aerosol vessel for filling the aerosol composition, the aerosol vessel comprising a pressure vessel and an aerosol valve fixed to the pressure vessel, and a spray member attached to the aerosol valve, wherein the aerosol composition contains substantially no water, the aerosol valve is not formed with a gas phase introduction hole, and the spray member is not provided with a mechanical breakup mechanism, the aerosol valve has a stem hole cross-sectional area / an injection hole cross-sectional area of 5.0 or more.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an aerosol product, and more particularly to an aerosol product having cooling properties. [Background technology]

[0002] Aerosol products with cooling properties are used in a wide range of applications, including industrial, biocidal, medical, and horticultural uses. As such aerosol products, for example, aerosol products containing hydrofluoroolefins have been developed (e.g., Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-73611 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-162497 Summary of the Invention [Problem to be solved by the invention]

[0004] Hydrofluoroolefins are expensive propellants and are still sometimes cited as posing environmental problems. Therefore, there has been a demand for the development of aerosol products that have sufficient cooling performance without using hydrofluoroolefins as propellants.

[0005] Furthermore, in Patent Document 2, the aerosol composition contains water in addition to the hydrofluoroolefin. However, if the pressure-resistant container is made of tinplate, rust, corrosion, etc. may occur, so there is a problem that an ordinary tinplate pressure-resistant container cannot be used, and an expensive aluminum pressure-resistant container must be used.

[0006] The present invention has been made in consideration of the above-mentioned problems, and specifically aims to provide an aerosol product having excellent cooling performance when it contains one or more propellants selected from the group consisting of dimethyl ether and liquefied petroleum gas. [Means for solving the problem]

[0007] That is, the present invention provides: [1] An aerosol composition containing 40 vol% or more of one or more propellants selected from the group consisting of dimethyl ether and liquefied petroleum gas; an aerosol container for filling with the aerosol composition, the aerosol container having an aerosol valve fixed to a pressure-resistant container; an ejection member attached to the aerosol valve, the aerosol composition is substantially free of water; The aerosol valve does not have a gas phase introduction hole. The injection member is not provided with a mechanical breakup mechanism, An aerosol product, wherein the cross-sectional area of ​​the stem hole of the aerosol valve and the cross-sectional area of ​​the injection hole of the injection member are such that the ratio of stem hole cross-sectional area / injection hole cross-sectional area is 5.0 or more. [2] The above aerosol product, characterized in that the stem hole cross-sectional area / injection hole cross-sectional area is 7.5 or more. to provide. [Effects of the Invention]

[0008] The aerosol product of the present invention can sufficiently cool an object, and when used in the biocidal field, for example, can exterminate organisms in the object without using a biocidal component. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic diagram of an aerosol product of the present invention; FIG. [Figure 2]1 is a diagram showing an example of an ejection member used in the aerosol product of the present invention. [Figure 3] FIG. 1 is a diagram showing an example of an aerosol valve used in the aerosol product of the present invention. [Figure 4] FIG. 1 is an explanatory diagram for explaining a method for measuring the temperature at the spray surface when an aerosol product is sprayed onto an aluminum plate. DETAILED DESCRIPTION OF THE INVENTION

[0010] The aerosol product of this embodiment is an aerosol container comprising a pressure-resistant container and an aerosol valve fixed to an opening of the pressure-resistant container; an ejection member attached to the aerosol valve; and an aerosol composition filled inside the aerosol container.

[0011] The aerosol valve comprises a valve mechanism consisting of a stem, a stem rubber, and a spring, a housing that houses the valve mechanism, and a mounting cup that holds the housing and is fixed to the opening of the container body.

[0012] The stem consists of a cylindrical upper stem portion and a cylindrical lower stem portion, with a valve hole called a stem hole at the base of the upper stem portion. The stem is biased upward by a spring, and the stem hole is constantly sealed by the inner diameter surface of the stem rubber. An injection member is attached to the upper stem portion, and an internal stem passage is provided within the upper stem portion that connects the stem hole to the injection member.

[0013] The housing accommodates the valve mechanism. A pilot hole is formed in the bottom of the housing for introducing the aerosol composition from the dip tube into the housing. On the other hand, the body of the housing of the present invention does not have a gas phase introduction hole that connects the interior of the housing with the gas phase in the aerosol container.

[0014] The spray member attached to the upper part of the stem includes a stem attachment part attached to the upper part of the stem, a spray hole for spraying the aerosol composition, and an internal passageway connecting the stem attachment part and the spray hole. On the other hand, the spray member of the present invention is not provided with a mechanical breakup mechanism.

[0015] If the ejection member is, for example, a button, pressing the button with a finger moves the stem downward, opening the stem hole. At this time, the aerosol composition in the aerosol container is introduced into the housing from the dip tube through the lower hole in the housing, passes through the stem hole, the passage in the stem, and the passage in the ejection member, and is ejected into the atmosphere from the ejection hole.

[0016] The cross-sectional area of ​​the injection hole is 0.07 to 0.30 mm 2 It is preferable that the thickness is 0.10 to 0.30 mm. 2 The shape of the injection hole is not particularly limited, and examples thereof include a circle and a square. When the injection hole is a circle, the diameter is preferably 0.3 to 0.6 mm, and more preferably 0.4 to 0.6 mm. When there are multiple injection holes, the cross-sectional areas of the respective injection holes are added together.

[0017] The cross-sectional area of ​​the stem hole of the aerosol valve is preferably 5.0 times or more, more preferably 7.5 times or more, and even more preferably 12.0 times or more, the cross-sectional area of ​​the injection hole. The cross-sectional area of ​​the stem hole is preferably 22.0 times or less the cross-sectional area of ​​the injection hole. The shape of the stem hole is not particularly limited, and examples include a circle and a square. When there are multiple stem holes, the cross-sectional areas of the stem holes are summed.

[0018] The pressure vessel is preferably made of tinplate.

[0019] The aerosol composition contains at least one propellant selected from dimethyl ether and liquefied petroleum gas at 40 vol% or more, preferably 50 vol% or more, more preferably 60 vol% or more, even more preferably 70 vol% or more, even more preferably 80 vol% or more, and most preferably 90 vol% or more. Dimethyl ether is preferably used as the propellant. The aerosol product of the present invention exhibits sufficient cooling performance without the use of hydrofluoroolefin, but this does not limit its use.

[0020] The aerosol product of the present invention can be used for biocidal purposes, industrial purposes, medical purposes, etc. The aerosol product of the present invention has excellent cooling performance, and is therefore particularly effective in biocidal purposes.

[0021] Examples of other components contained in the aerosol composition of the present invention include biocidal components, antibacterial components, deodorizing components, oily components, alcohols, surfactants, fragrances, and powders. These components may be used alone or in combination of two or more, but it is preferable to use liquid components.

[0022] Examples of biocidal components include pyrethroid compounds, carbamate compounds, neonicotinoid compounds, metadiamide compounds, and oxadiazole compounds.

[0023] Oily ingredients include hydrocarbon oils such as normal paraffin, isoparaffin, and naphthene, esters such as ethyl acetate, propyl acetate, isobutyl acetate, butyl acetate, methyl lactate, ethyl lactate, butyl lactate, and isopropyl myristate, ethylene glycol, diethylene glycol, propylene glycol, polyethylene glycol, polypropylene glycols, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol mono-n-butyl ether, ethylene glycol mono-tert-butyl ether, 2-ethoxyethyl acetate, 3-methoxy-3-methylbutanol, 3-methoxy-3-methylbutyl acetate, 1-methoxy- Examples of suitable solvents include glycol ethers such as 2-propanol, 1-methoxypropyl-2-acetate, 1-ethoxy-2-propanol, propylene glycol monopropyl ether, 3-methoxybutyl acetate, ethyl 3-ethoxypropionate, propylene glycol monomethyl ether propionate, diethylene glycol monobutyl ether, and triethylene glycol monobutyl ether; silicone oils such as octamethyltrisiloxane, methylpolysiloxane, and cyclopentasiloxane; and ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, diisobutyl ketone, cyclohexanone, 4-hydroxy-4-methyl-2-pentanone, and isophorone.

[0024] Examples of alcohols include methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, 2-methyl-2-propanol, benzyl alcohol, and phenoxyethanol.

[0025] The aerosol composition is defined as being substantially free of water. Here, "substantially free" does not require that the water content be strictly 0%, but rather includes cases where water is unintentionally included. For example, the aerosol composition is defined as being "substantially free" when the active ingredients, solvents, etc. that make up the aerosol composition unintentionally contain water or when they absorb moisture from the atmosphere.

[0026] When the aerosol product of the present invention is used for biocidal purposes, pests or harmful organisms can be more easily exterminated by incorporating an oily component, alcohol, or biocidal component into the aerosol composition.

[0027] In the above biocidal applications, for example, Hemiptera insects such as planthoppers, leafhoppers, aphids, and stink bugs, Lepidoptera insects such as pyralids, cutworms, tussock moths, diamondback moths, tiger moths, burrs moths, and burrowing moths, Diptera insects such as house mosquitoes, Aedes mosquitoes, midges, house flies, blow flies, flesh flies, flower flies, fruit flies, Drosophila, flea flies, moth flies, black flies, horseflies, and stable flies, Coleoptera insects such as leaf beetles, cockroaches, cockroaches, and cockroaches. It is expected to be effective in exterminating harmful insects such as cockroaches such as lice and termites, Hymenoptera such as bees, ants, ant wasps and sawflies, Flea, Phthiraptera, Ephemeroptera, mites such as ticks, chicken mites, chiggers and jewel mites, spiders such as house spiders and ghost spiders, house centipedes, millipedes, woodlice such as pillbugs and small woodlice, gastropods such as slugs, annularia such as leeches, and reptiles such as lizards and snakes. [Example]

[0028] The present invention will be further explained below with reference to examples, but the present invention is not limited to these examples.

[0029] As shown in Table 1, various aerosol products were prepared by filling aerosol compositions into aerosol containers with aerosol valves and attaching spray members. Note that LPG0.35 is a liquefied petroleum gas with a pressure of 0.35 MPa at 20°C, LPG0.47 is a liquefied petroleum gas with a pressure of 0.47 MPa at 20°C, and IP Solvent 2028 is an isoparaffin with 12 to 16 carbon atoms.

[0030] [Table 1] TIFF2026028618000002.tif52163

[0031] The thermocouple of a portable thermometer sensor (Model: ST-23L, Element: K, Class: 2, manufactured by Rika Kogyo Co., Ltd.) was fixed so that it was in contact with the approximate center of one side of an aluminum plate measuring 250 mm in length, 250 mm in width, and 0.5 mm in thickness. Various aerosol products were sprayed for 5 seconds from a position 30 cm away toward the approximate center of the opposite side of the aluminum plate where the thermocouple was fixed, and the largest temperature drop was recorded as the minimum drop temperature. The measurements were conducted in a laboratory at 25°C. Table 2 shows the measurement results.

[0032] [Table 2] TIFF2026028618000003.tif7334 [Explanation of symbols]

[0033] 1. Aerosol composition 2. Pressure vessel 3 injection hole 4. Housing 5 stem hole 6 thermocouples 7 Aluminum Plate

Claims

1. an aerosol composition containing 40 vol% or more of one or more propellants selected from the group consisting of dimethyl ether and liquefied petroleum gas; an aerosol container for filling with the aerosol composition, the aerosol container having an aerosol valve fixed to a pressure-resistant container; an ejection member attached to the aerosol valve, the aerosol composition is substantially free of water; The aerosol valve does not have a gas phase introduction hole. The injection member is not provided with a mechanical breakup mechanism, An aerosol product, characterized in that the cross-sectional area of ​​the stem hole of the aerosol valve and the cross-sectional area of ​​the injection hole of the injection member are such that the ratio of stem hole cross-sectional area / injection hole cross-sectional area is 5.0 or more.

2. 2. The aerosol product according to claim 1, wherein the stem hole cross-sectional area / injection hole cross-sectional area is 7.5 or more.

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