JPH04332786A - Propellant composition for aerosol - Google Patents

Abstract

PURPOSE:To provide a propellant composition for aerosol having an extremely small influence on destruction, etc., of ozonosphere with extremely remote danger of fire. CONSTITUTION:A propellant composition for aerosol consisting essentially of 1,1,1,2,2,3,3-heptafluoropropane. Furthermore, a propellant composition for the aerosol containing hydrocarbons such as LPG, ethers such as dimethyl ether, halogenated hydrocarbons such as dichlorotrifluoroethane or chlorodifluoroethane and the 1,1,1,2,2,3,3-heptafluoropropane is provided.

Description

[Detailed description of the invention]

0001

FIELD OF THE INVENTION This invention relates to propellant compositions for aerosols.

0002

[Prior Art] Properties required for aerosol propellants include appropriate dissolving power, appropriate vapor pressure, non-toxicity, chemical stability, non-corrosion to containers, etc., odorless, and nonflammability. can be mentioned. Conventionally, there are chlorofluorocarbon compounds (hereinafter referred to as CFCs) such as trichloromonofluoromethane, dichlorodifluoromethane, trichlorotrifluoroethane, and dichlorotetrafluoroethane that satisfy these requirements, and these gases can be used alone or in combination. It has been used as

Liquefied petroleum gas (LPG), DME (dimethyl ether), etc. are also used, but since they are flammable gases, aerosol products are highly combustible and pose a risk of fire during use and storage.

0004

[Problems to be Solved by the Invention] The above-mentioned CFC has ideal properties as a propellant, but because it is chemically extremely stable, it has a long life in the troposphere and diffuses into the stratosphere. The use of chlorine radicals, which are decomposed by sunlight and generated here, causes a chain reaction with ozone and destroys the ozone layer, so the use of chlorine radicals has been regulated. For this reason, in place of conventional CFCs, there is active search for alternative propellants that are less likely to destroy the ozone layer.

[0005] As alternative propellants, the above-mentioned LPG, DME
In addition, hydrochlorofluorocarbon compounds (hereinafter referred to as HCFCs) such as chlorodifluoromethane, chlorodifluoroethane, and dichlorotrifluoroethane are being considered, but LPG and DME are highly flammable products and are likely to cause an increase in accidents. Therefore, it is not desirable to use it in aerosol products that are intended to be used directly on the human body. Also, H
Compared to CFC, CFC contains hydrogen, so it has a short life in the troposphere, and its impact on the ozone layer is extremely small, but not zero, and there is a need to develop propellants that have even less impact on the environment.

The object of the present invention is to provide a novel propellant composition that can be used as an alternative propellant that has extremely little impact on the environment while satisfying the excellent properties of conventional CFC. It is.

[0007]

[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems.
, 3,3-heptafluoropropane (hereinafter referred to as R227c) as a main component, and an aerosol propellant composition containing R227c and at least one selected from hydrocarbons, ethers, and halogenated hydrocarbons. The present invention provides a drug composition.

In the present invention, hydrocarbons include ethane, propane, n-butane, isobutane, butylene,
Examples include LPG such as cyclopentane, n-pentane, isopentane, liquefied propane (propane/propylene), and liquefied butane (butane/butylene), and preferably hydrocarbons having 2 to 5 carbon atoms. These can be used alone or as a mixture of two or more, preferably LPG
It is.

[0009] As the ethers, ethers having 2 to 5 carbon atoms such as dimethyl ether, methyl ethyl ether, methyl propyl ether, methyl butyl ether, diethyl ether, and ethyl propyl ether are preferable, and dimethyl ether is particularly preferred because of its low toxicity. suitable. These can be used alone or as a mixture of two or more.

Examples of halogenated hydrocarbons include trichloromonofluoromethane, dichlorodifluoromethane, chlorodifluoromethane, trichlorotrifluoroethane, dichlorotetrafluoroethane, dichlorotrifluoroethane, chlorotetrafluoroethane, tetrafluoroethane, and dichlorofluoroethane. Ethane, chlorodifluoroethane, dichloropentafluoropropane, chlorohexafluoropropane, octafluorocyclobutane, etc. R
It is a halogenated hydrocarbon other than 227c, and these can be used alone or in a mixture of two or more.

Furthermore, two or more of these hydrocarbons, ethers and halogenated hydrocarbons may be used in combination.

[0012] The mixing ratio of the mixture consisting of at least one selected from hydrocarbons, ethers and halogenated hydrocarbons and R227c is such that R227c is 50 to 90w.
t%, hydrocarbons from 0 to 50 wt%, preferably from 5 to 5
0 wt%, ethers 0 to 50 wt%, preferably 5
~50wt%, 0 to 50wt% of halogenated hydrocarbons
, preferably 5 to 50 wt%.

The composition of the present invention includes various drugs such as skin medicines, antiperspirants, athlete's foot medicines, and deodorants, alcoholic solvents such as ethanol and isopropyl alcohol, talc, kaolin,
An aerosol composition can be prepared by blending hydrophobic powders such as celite and red iron or anticorrosive agents such as nitromethane and epichlorohydrin.

[0014]

[Examples] Examples of the present invention are shown below. [Examples 1 to 12] Examples of use as antiperspirants are shown in Table 1.
Examples of use as an insect repellent are shown in Table 2, and examples of use as a hair spray are shown in Table 3. Note that the units of numbers are parts by weight. Further, 2,2-dichloro-1,1,1-trifluoroethane is referred to as R123, and 1-chloro-1,1-difluoroethane is referred to as R142b.

[0015]

[Table 1]

[0016]

[Table 2]

[0017]

[Table 3]

[0018]

Effect of the invention: 1,1,1,2,2,3,3- of the present invention
Since heptafluoropropane contains hydrogen atoms, it has a short lifetime in the troposphere, and since it does not contain chlorine atoms, it does not destroy the ozone layer at all. Furthermore, 1, 1, 1, 2, 2, 3
,3-heptafluoropropane is nonflammable and poses no fire hazard. Therefore, the aerosol propellant of the present invention has an extremely small impact on the environment, and as shown in the Examples, has an extremely low risk of fire and is therefore excellent.

Claims (5)

[Claims] Claims: 1. An aerosol propellant composition containing 1,1,1,2,2,3,3-heptafluoropropane as a main component. 2. At least one selected from hydrocarbons, ethers and halogenated hydrocarbons and 1,1,1,
An aerosol propellant composition comprising 2,2,3,3-heptafluoropropane. 3. The aerosol propellant composition according to claim 2, wherein the hydrocarbon is LPG. 4. The aerosol propellant composition according to claim 2, wherein the ether is dimethyl ether. 5. The halogenated hydrocarbons are trichloromonofluoromethane, dichlorodifluoromethane, chlorodifluoromethane, trichlorotrifluoroethane, dichlorotetrafluoroethane, dichlorotrifluoroethane, chlorotetrafluoroethane, tetrafluoroethane, dichlorofluoro ethane, chlorodifluoroethane,
The propellant composition for aerosol according to claim 2, which is at least one selected from dichloropentafluoropropane, chlorohexafluoropropane, and octafluorocyclobutane.