JPH0211565B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to an aerosol hair removal agent, and more particularly to a quick-drying aerosol hair removal agent that causes very little pain during hair removal, and very little irritation or side effects to the skin. [Prior Art] Conventionally, wax-type, adhesive-type, and adhesive-type hair removal agents are known as hair removal agents used by women to remove unwanted hair from their arms and legs.
Aerosol type hair removal agents are not in practical use. [Problems to be solved by the invention] Using any of the conventionally known wax-type, adhesive-type, or adhesive-type hair removal agents, the hair is forcibly pulled to remove hair, which causes pain and, in some cases, It may even cause inflammation. Furthermore, wax-type hair removal agents have the disadvantage of poor workability since the wax must be melted at high temperatures before use. In this way, conventional hair removal agents have poor workability and cause skin irritation and side effects during hair removal, so we developed a hair removal agent that dries quickly, has excellent workability, and has very little irritation to the skin and side effects during hair removal. The problem was to come up with a solution. [Means for Solving the Problems] In order to solve the above-mentioned problems, the inventors of the present invention have conducted various studies, particularly regarding aerosol type hair removal agents, and have found that low boiling point solvents and liquefied gases irritate the skin. The inventors have now completed the present invention by discovering that the liquefied gas has very few side effects and has a cooling sensation on the skin and is moderately effective in temporarily paralyzing the nerves. That is, the present invention uses 5 to 30 parts of resin and 0.1 parts of plasticizer.
~10 parts, 5 to 60 parts of a low-boiling solvent, and 20 to 75 parts of liquefied gas as a propellant, or together with an appropriate amount of pigment or dye, the total amount of each being 0.00 parts. resin,
This is an aerosol hair removal agent in which an aerosol container is filled with a plasticizer, a low-boiling solvent, a liquefied gas as a propellant, and, if necessary, a pigment or dye, and is equipped with an aerosol valve and button. The present invention will be explained in detail below. As the resin used in the present invention, any resin can be used as long as it is effective for forming a resin film. Preferred specific examples include butyral resin, acrylic resin, styrene resin, and the like. These resins may be used alone or in combination of two or more, and have a moderate molecular weight (preferably 20,000 to 20,000).
200000) for practical use. Next, as the plasticizer, any plasticizer can be used as long as it provides a plasticizer to the resin film to be formed. Generally, those listed in the Japanese Food Additives Standards or the Standards for Cosmetic Raw Materials are desirable, but they are not limited to these. Specific examples of preferred plasticizers include lipophilic nonionic surfactants (such as sorbitan fatty acid esters and glycerin fatty acid esters) and hydrophilic nonionic surfactants (preferably polyoxyethylene alkyl phenyl ethers and polyoxyethylene sorbitan). (fatty acid ester), phthalic acid diester, or a mixture selected from these.
These plasticizers have little irritation to the skin. Next, as a low boiling point solvent, boiling point is 0℃~80℃
Suitable materials are semi-nonflammable materials that are not toxic to the extent that they cause little irritation to the skin. A specific example of this is nonflammable trichloromonofluoromethane (hereinafter referred to as
F11), trichlorotrifluoroethane (hereinafter referred to as F113), or a semi-nonflammable mixture selected from F11, F113, and alcohol. Although flammable, pentane, hexane, etc. can also be used, depending on the amount used, or by mixing with non-flammable F11, F113, etc. Next, as a liquefied gas that mainly acts as a propellant, for example, dichlorodifluoromethane (hereinafter referred to as
F12), monochlorodifluoromethane (hereinafter referred to as F22), or F12, F22, dichlorotetraoloethane (hereinafter referred to as F114), monochlorodifluoroethane (hereinafter referred to as F142b),
Preferred examples include a mixed liquefied gas selected from dimethyl ether and liquefied petroleum gas. Nonflammable liquefied gases such as F12 and F22 can be used alone, but flammable gases such as dimethyl ether and liquefied petroleum gas must be used within a range that maintains nonflammability to slightly flammability (flame length as defined in Ministry of International Trade and Industry Notification No. 557). is 25
It can be used by mixing it with nonflammable liquefied gas (for example, in the case of F12 and liquefied petroleum gas, up to 70:30% by weight of liquefied petroleum gas can be used) so that the explosive concentration is 0.25 g/cm or more). . Currently, F12 is being used as an instant treatment for strokes, but this is intended to have the effect of cooling the affected area with the heat of vaporization of F12 at the same time as it is sprayed. The same thing can be said for aerosol hair removal agents; when F12, F22, propane, etc., which have low boiling points, are applied, the area to be removed will be numbed by cooling, so it is desirable to use a large amount of these liquefied gases. In addition, liquefied gas should be used so that the internal pressure of the aerosol hair removal product is below 8 kg/cm ² at 35°C, which is required by law. Furthermore, in order to make the resin film formed using the aerosol depilatory agent of the present invention look more beautiful, an appropriate amount of pigments, dyes, etc. can be added in the present invention. The aerosol depilatory agent of the present invention includes the above-mentioned resin,
A plasticizer, a low boiling point solvent, and a liquefied gas as a propellant, and if necessary, a pigment or dye, 5 to 30 parts of a resin, 0.1 to 10 parts of a plasticizer, and 5 to 60 parts of a low boiling point solvent.
and 20 to 75 parts of liquefied gas as a propellant, or these together with an appropriate amount of pigment or dye, each adding up to a total amount of
Manufactured by filling 100 parts into an aerosol container and attaching an aerosol valve and button. In this case, by appropriately selecting a low boiling point solvent and a liquefied gas as a propellant, it is possible to obtain an aerosol depilatory agent that is quick drying and has a slightly flammable or better rating. Furthermore, filling the aerosol container, attaching the aerosol valve and button, etc., can be carried out in accordance with conventional methods for manufacturing aerosol products. When producing the aerosol hair removal agent of the present invention, if the resin content is less than 5 parts, the formed resin film will be thin and workability will be poor, and if the resin content is more than 30 parts, it will dry too quickly and adhere to the skin. There is a risk that the hair removal effect will be lost, so please use resin at 5.
~30 copies is appropriate. In addition, plasticizer
If the amount is less than 0.1 part, the plasticity of the formed resin film will decrease, and if it is more than 10 parts, the plasticity will increase and there is a risk that the hair removal effect will be lost.
It is appropriate to have 10 copies. In addition, if the low boiling point solvent is less than 5 parts, it dries too quickly and does not adhere to the skin and has no hair removal effect, and if the low boiling point solvent is more than 60 parts,
Since the contents of the applied aerosol may flow easily on the skin, resulting in poor workability, it is appropriate to use 5 to 60 parts of the low boiling point solvent. In addition, if there is little liquefied gas as a propellant, the injection performance may be insufficient, and if there is a large amount of liquefied gas with a low boiling point, the pressure will increase, and the legal pressure of the High Pressure Gas Control Act (8 kg / 35 degrees Celsius) will increase. cm ² or less), it is appropriate to use 20 to 75 parts of liquefied gas. Next, the use of the aerosol hair removal agent of the present invention and the mechanism of hair removal will be described. When the button of the aerosol depilatory agent of the present invention is pressed and applied to the depilated area (the hair stands on end), the heat of vaporization of the liquefied gas cools and paralyzes the depilated area, dulling the sensation. As the liquefied gas tends to vaporize, a wind-flap-like resin film is formed on the hair removal site, and the hair is trapped in an upright shape within this resin film. The liquefied gas is much heavier than air, so the area to be removed is continuously cooled and numbed. After about 1 minute, when the resin film that had become like a pinwheel was crushed, the liquefied gas that vaporized at the same time flew away.
Most of the hairs that were in an upright shape are taken in and fixed in a pack-like shape made by crushing the resin film, which has become a pinnacle-like shape, by pressing it from above. Leave it for about 5 minutes until the stickiness disappears, and then peel off the resin film that has formed into a patch. Since it is removed from the root of the hair, hair removal can be done with less pain. [Effects of the Invention] Next, the effects of the aerosol hair removal agent of the present invention will be explained with reference to test examples. Test example The subjects were 10 women (18 to 35 years old), and the products of Example 1, Example 2, and Example 3 below were applied to the hair removal area and the pain, irritation, and side effects were observed. Table 1 shows the results of a survey on the workability of hair removal. In addition, in order to evaluate the pain during hair removal, ○ indicates no pain, △ indicates a little pain but does not feel painful, and × indicates pain and is painful. Shown in the table. In addition, regarding skin irritation or side effects, ○ is for those that have no irritation or side effects, △ is for those that are slightly irritating, causes discomfort, and △ is for those that are too cold, causes inflammation, or causes discomfort. ×, and the number of people corresponding to each category is shown in Table 1.
Regarding the workability of hair removal, 〇 indicates that it is easy and good, and △ indicates that it is the same as the previous hair removal agent.
Items that are time-consuming or difficult to use are marked with an x, and the number of people corresponding to each category is shown in Table 1. Further, in the overall evaluation, ◎ indicates very good, and △ indicates not good. As a comparative example, Table 1 shows the results of the same investigation as above regarding a commercially available wax-type hair removal agent (which is applied to the area to be removed for hair removal after melting with heat).

〔Example〕

Next, the aerosol depilatory agent of the present invention will be explained in more detail with reference to Examples, but the present invention is not limited thereto. In addition, in the example,
Parts are parts by weight. Example 1 11 parts of acrylic resin [Dyanal manufactured by Mitsubishi Rayon Co., Ltd., molecular weight 110,000] as a resin, 3 parts of glycerin monooleate as a plasticizer, 1 part of zinc oxide as a pigment, 17 parts of F11 as a low boiling point solvent Department and
An aerosol pressure-resistant container was filled with 3 parts of 99% geraniol denatured alcohol and 65 parts of F12 as a propellant, and an aerosol valve and button were attached to produce an aerosol hair removal agent. The obtained aerosol hair removal agent has an internal product pressure of 6.0 Kg/ ^cm2 at 35℃, is nonflammable (flame length 0 cm, explosive concentration
The aerosol product passed the test (3.5g/no explosion). Example 2 10 parts of butyral resin (manufactured by Sekisui Chemical Co., Ltd., molecular weight 90,000) as the resin, 2 parts of sorbitan monooleate as the plasticizer, and 2 parts of sorbitan monooleate as the low boiling point solvent.
An aerosol pressure-resistant container was filled with 22 parts of F113, 8 parts of 99% undenatured alcohol, 29 parts of dimethyl ether as a propellant, and 29 parts of F22, and an aerosol valve and button were attached to produce an aerosol hair remover. The obtained aerosol hair removal agent has a product pressure of 5.2 Kg/ ^cm2 at 35°C and is slightly flammable (flame length 0 cm, explosive concentration
The aerosol product passed the test (0.88g/). Example 3 20 parts of styrene resin [Dainippon Ink & Chemicals Co., Ltd., Decks Styrene molecular weight 60,000] was used as the resin.
Mix 2 parts of diethylene phthalate as a plasticizer, 23 parts of F11 as a low boiling point solvent, 40 parts of F12 as a propellant, and liquefied petroleum gas (propane, butane) at 25℃.
(pressure: 4.0 Kg/cm ² ) was filled into an aerosol pressure-resistant container, and an aerosol valve and button were attached to produce an aerosol hair removal agent. The obtained depilatory agent had a pressure of 5.5 kg/cm ² at 35°C.
The aerosol product passed flame retardancy (flame length 0 cm, explosive concentration 2.1 g/).

Claims (1)

[Claims] 1. 5 to 30 parts of resin, 0.1 to 10 parts of plasticizer, 5 to 60 parts of low boiling point solvent, and 20 to 30 parts of liquefied gas as a propellant.
Resin, plasticizer, low-boiling solvent, and liquefied gas as a propellant, as necessary, consisting of 75 parts or more of these and an appropriate amount of pigment or dye, for a total of 100 parts of each. Fill the aerosol container with the pigment or dye according to the
Aerosol hair removal agent equipped with an aerosol valve and button. 2. The aerosol hair removal agent according to claim 1, wherein the resin is a butyral resin, an acrylic resin, a styrene resin, or a mixed resin selected from these resins. 3. The plasticizer is a lipophilic nonionic surfactant (preferably sorbitan fatty acid ester, glycerin fatty acid ester), phthalic acid diester,
Alternatively, the aerosol depilatory agent according to any one of claims 1 to 2, which is a mixture selected from these. 4. Any one of claims 1 to 3, wherein the low boiling point solvent is trichloromonofluoromethane, trichlorotrifluoroethane, or a mixture selected from trichloromonofluoromethane, trichlorotrifluoroethane, and alcohol. The aerosol hair removal agent described in . 5. A patent in which the liquefied gas as a propellant is dichlorodifluoromethane, monochlorodifluoromethane, or a mixture liquefied gas selected from dichlorodifluoromethane, monochlorodifluoromethane, dichlorotetrafluoroethane, monochlorodifluoroethane, dimethyl ether, and liquefied petroleum gas. The aerosol hair removal agent according to any one of claims 1 to 4.