JPS61165320A - Power aerosol product - Google Patents

Abstract

PURPOSE:A powder sol product that is obtained by filling an aerosol vessel provided with a specifically structured valve with a hydrophobic powder or its suspension in a higher alcohol and flon 142b as a major propellant, thus showing good performance with high safety. CONSTITUTION:A composition containing 3-10wt% of a hydrophobic powder such as talc, kaolin or its suspension in a higher alcohol and 85-98wt% of a propellent mainly consisting flon 142b (chemical name: 1-chloro-1,1- difluoromethane) is contained in an aerosol vessel which has 2 or less stem holes 8A in stem 8, 0.45-0.65mm stem diameter, 1.0-2.5mm diameter of bottom hole 4A in the housing and a valve structure of 0.5-0.65mm diameter of the jetting nozzle 9B in the actuator and 0.5-0.8mm diameter of the vapor tap 4B. Good powdery spray can be kept for a long period of time.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to powder aerosol products.

[Prior art]

Powdered aerosol products are generally used as deodorants for the human body, and are applied by spraying onto specific target skin areas such as the armpits or the entire body. Unlike other aerosol products, such powdered aerosol products that are applied to the human body must meet certain conditions regarding explosiveness and flammability in order to ensure safety. Of course, as a powder aerosol product for the human body,
Conditions are set regarding the size of the aerosol particles to be sprayed, the amount of spraying, and the spraying pressure in order to properly adhere the powder. In addition to the safety of the active ingredients, the redispersibility of the propellant and powder,
Corrosion resistance, pressure resistance, and the risk of pulp clogging must also be considered.

Conventional powder aerosol products contain hydrophobic powder, higher alcohols as emollient agents, disinfectants, and, for example, dichlorodifluoromethane called Freon 12 and tricumylfluoromethane called Freon 11. Properly blended propellants have been put into practical use.

[Problem that the invention seeks to solve]

The propellant and L°C gases used in conventional powder aerosol products are also widely used in other aerosol products, but these gases are considered to be a potential cause of air pollution. 9. Powder aerosol products that do not use these gaseous propellants are therefore currently highly desired.

[Means for solving problems]

The present invention uses dichlorodifluoromethane (7o
N12)-? ) Liquid a fluoro a methane (Freon l1)
By using a specific propellant other than the above and filling an aerosol container equipped with a propellant with a specific structure, a powder aerosol that is sufficiently safe and has good performance can be obtained.

[Structure of the invention]

In the present invention, a higher alcohol and optionally used emollients, fragrances, etc. are added to the hydrophobic powder, and the mixture is filled into an aerosol container together with a propellant. The propellant used here is l-chloro-1, also known as Freon 142b.
, l-cyfluoro a x p 7 alone, a mixture thereof with chlorodifluoromethane called Freon 22, or a mixture of l-chloro-1,1-difluoroethane and liquefied petroleum gas or dimethyl ether are used. Here, when mixing the propellant with lyaldifluoro-methane, the proportion of the propellant should be 10 to 20 kg/- so that the pressure is 2.0 to 3.5 kg/- at a temperature of 25°C.
% by weight, or if liquefied petroleum gas or dimethyl ether is mixed, the proportion should be 1% by weight of the propellant.
It is preferable that the content is 5 to 30% by weight.

Examples of the hydrophobic powder used in the present invention include Merck, celite, kaolin, red iron, bentonite, aluminum chlorohydrochloride, and others.

In addition, higher alcohols act as spreading and dispersing agents, and specific examples include 1,3-butylene glycol, oleyl alcohol, lanolin alcohol, cetyl isooctanoate, hexyldecyl isostearate, and octyldodecyl myristate. can be mentioned.

The spreading agent acts as a dispersing agent that disperses the above-mentioned hydrophobic powder to form a suspension, but when powder or higher alcohol is used in these aerosol formulations, the proportion is 0.
．． There are 5 to 15 layers. The proportion of said propellant is then 85 to 98% by weight.

The aerosol preparation obtained as described above is filled into the aerosol container shown below.

FIG. 1 shows an example of the structure of an aerosol container used in the present invention. In Fig. 1, l is the container body, 2 is a mountain cup, 3 is a companion gasket held in the mountain cup 2, and 4 is a gasket 3 held in the mountain cup 2.
The r7 ring, 5, is connected to the small-diameter cylindrical connecting part at the bottom of the housing 4, and the next dip tube, 6
is arranged in the internal space 7 of the housing 4, and the spring is
8 is restrained upward by the spring 6, and 9 stems, 9
shows the ff7t actuator installed on the top of stem 8,
The /1f7 ring 4 has four pilot holes communicating with the dip tube 5, and an E/L-tap 4B that communicates the internal space 7 with the space inside the container body l, and the stem 8 is shown in the figure. When the stem hole is in the upper position pushed up by the spring 6, it is closed by the gasket 3, and when it is pushed down via the actuator 9 and is in the lower operating position, the stem hole opens into the internal space 7 of the housing 4. , has a flow path 8B that communicates with the eight stem holes and communicates with the nine internal cavities of the actuator 9. Furthermore, the actuator 9 has a nozzle hole 9B communicating with its internal cavity 9A. In the present invention, the diameter of each of the eight stem holes of the stem 8 is 0.45 to 0.45. The diameter of the lower hole 4A of the housing 4 is between 1.0 and 9.5 m. ! S m
and the nozzle hole 9B of the actuator 9.
Use an aerosol container with a valve structure tV, which has a small diameter of the eel in the range of 0.5 to 0.65 mm, and a size such that the hole diameter of the paper tap 4B is 0.5 to 0.8 mm or less. .

[! Since the powder aerosol product of the present invention is as described above, the propellant is mainly 1-chloro-1,1-difluoroethane. It is 2.0 to 8.5 kl/an2 at a temperature of 25C, and therefore does not cause air pollution. Furthermore, as will be clear from the description of the examples below, since the aerosol container has a valve of a specific size, a powder aerosol product with excellent performance can be obtained. Although the propellant is the same as mentioned above, it is smoke-producing and flammable.

It is sufficiently safe as it has a low value, and has excellent performance in terms of aerosol particle size, injection amount, pressure resistance, powder redispersibility, valve characteristics, etc.

A good powder spray can be achieved over a long period of time.

〔Example〕

A powdered aerosol product was prepared using an aerosol container equipped with a composition according to the formulation shown in Table 1 and a valve according to the conditions shown in Table 1, and an explosion test was carried out using a bamboo powder with an explosion limit (&/,
L) was determined, and a flammability test was conducted using bamboo.
) was measured. The results are shown in Table 1.

Further, the products of each example were left in an environment at a temperature of 45 G for 6 months, and then examined for pulp caking, redispersibility, and container corrosion.

Regarding valve clogging, 50 product tables were tested, and zero valve clogging occurred. We tested each product for redispersibility, but no defective products were found.J! Regarding corrosion resistance, we tested 10 products by holding them upside down, but none of them showed any change in quality or odor due to corrosion.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of the structure of an aerosol container that can be used in the present invention. ■...Container body 2...Mountain cup 8...Gasket 4...No1 Uzing 5...
・Date Petite Neve 6... Spring 7... Internal space 8... Stem 9... Actuator, no.

Claims (1)

[Claims] 1) A composition comprising 3 to 10% by weight of a hydrophobic powder or a higher alcohol suspension thereof and 85 to 98% by weight of a propellant mainly composed of 1-chloro-1,1-difluoroethane. A powder aerosol product characterized by being filled into an aerosol container equipped with a valve that satisfies the following conditions. (a) The diameter of the lower hole of the housing is 1.0 to 2.5 mm. (b) The diameter of the vapor tap of the housing is 0.5 to 0.
．． Must be 8mm. (c) The number of stem holes is 2 or less and the diameter is 0.45 to 0.
Must be 6mm. (d) The diameter of the nozzle hole is 0.5 to 0.65 mm.