JP2000344631A - Aerosol type hair spray - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aerosol type hair spray which is highly safe at high temperature and does not cause a clogging phenomenon, even when a setting agent resin is compounded. SOLUTION: This aerosol type hair spray comprises an undiluted liquid, isopentane and a compression gas, has an undiluted liquid:isopentane weight ratio of 99.0:0.1 to 80:20, and finally has an initial inner pressure of 0.5 to 1.0 MPa at 25 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an aerosol hair spray. More specifically, the present invention relates to an aerosol hair spray using a compressed gas as a propellant and less likely to cause clogging.

[0002]

2. Description of the Related Art A hair spray for the purpose of hair styling and set keeping is a method in which a stock solution containing a setting agent resin compound in alcohol or an alcohol-water mixed solvent and a liquefied gas serving as a propellant are hermetically sealed in an aerosol can. Used as an aerosol hair spray.

[0003] These aerosol hair sprays are:
Due to the use of a liquefied gas as a propellant and the presence of a large amount of alcohol in the stock solution, the risk of rupture in the worst case at extremely high temperatures cannot be ruled out.

[0004]

In order to avoid this danger, a method of changing the liquefied gas of the propellant to a compressed gas is conceivable. However, when the gas is changed to a compressed gas, the setting agent resin compound is contained in the stock solution. If it is included, there is a problem that the solidification occurs in the inner hole of the actuator and a so-called clogging phenomenon (a state in which the contents are not ejected even when the actuator is pressed) occurs.

The inventor of the present invention has conducted intensive studies to solve the above-mentioned problems. As a result, when the stock solution, isopentane and compressed gas were combined at a specific mixing ratio and the initial internal pressure of the compressed gas in the aerosol can was adjusted, the stock solution became The present inventors have found that an aerosol-type hair spray which does not cause a clogging phenomenon even when containing a setting agent resin compound is obtained, and have completed the present invention.

The present invention provides an aerosol-type hair spray which uses a compressed gas as a propellant to prevent the risk of rupture at high temperatures and solves the clogging phenomenon caused by a stock solution which tends to occur when a compressed gas is used. The purpose is to:

[0007]

That is, the present invention comprises a stock solution, isopentane and a compressed gas, wherein the weight ratio of the stock solution to isopentane is in the range of 99.9: 0.1 to 80:20, And finally the initial internal pressure is 0.5 ~ at 25 ℃
The present invention provides an aerosol hair spray having a pressure of 1.0 MPa.

[0008] The present invention also provides the above-mentioned aerosol hair spray, wherein the stock solution contains a setting agent resin compound.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail.

The reason why the aerosol-type hair spray for the purpose of hair styling and set keeping is clogged (the content is not ejected even when the actuator is pressed) is due to the solidification of the setting agent resin compound in the inner hole of the actuator. Overwhelmingly many.

Usually, in an aerosol type hair spray using a liquefied gas as a propellant, the propellant contains a large amount of propellant. The propellant ejects the contents of the inner hole of the actuator to the outside when the injection is stopped (when the actuator is stopped to be pressed). As a result, the amount of the setting agent resin compound solidified in the hole is reduced, and the clogging phenomenon is less likely to occur.

However, when the compressed gas is used as the propellant, the amount of the propellant dissolved in the ejected material is small, and the injection is stopped (when the actuator is stopped being pressed).
Therefore, the contents of the inner hole of the actuator remain without being ejected. As a result, the amount of the setting agent resin compound solidified in the hole increases, and the clogging phenomenon is likely to occur.

The greatest feature of the present invention, which uses compressed gas instead of the liquefied gas normally used in aerosol propellants, is that isopentane is used in a specific blend with the stock solution. Isopentane has a boiling point of about 28 ° C., which is lower than the boiling point of ethyl alcohol usually used in cosmetics and the like. Therefore, when the injection is stopped (when the actuator is stopped being pressed), the contents remaining in the inner hole of the actuator are pushed out by the volume increase accompanying the vaporization of isopentane, and as a result, the setting agent resin compound solidifies in the hole. It is considered that the amount is reduced and the clogging phenomenon is less likely to occur.

The blending amount of isopentane is such that the weight ratio of the stock solution to isopentane satisfies 99.9: 0.1 to 80:20. Preferably, 99.7 to 0.3% to 95 to 5
Is the amount that satisfies If the amount of isopentane is less than the above amount relative to the stock solution, the "clogging" phenomenon will increase significantly, and if it exceeds the above amount, the internal pressure will increase significantly due to the temperature rise, and bursting at high temperatures will occur. The safety is reduced because of the increased danger.

The compounding amount of the compressed gas is such that the compressed gas is mixed with the stock solution, and the initial internal pressure at 25 ° C. is 0.5 MPa to
It is an amount that can be adjusted to 1.0 MPa and is appropriately determined.
The compressed gas used in the present invention refers to compressed air, nitrogen gas, and carbon dioxide gas. The most preferred of these is carbon dioxide. This is because carbon dioxide gas is dissolved in water and alcohol, which are the main components of the stock solution, and produces good mist. On the other hand, compressed air and nitrogen gas hardly dissolve in the undiluted solution. Therefore, although the atomization is inferior to that using carbon dioxide gas, the internal pressure rise at high temperatures is slower, so that they are less likely to burst and are safer.

The stock solution used in the present invention is a hair cosmetic, and the solution as the main component thereof may be any of water, alcohol, and a mixed solution of water and alcohol. Alcohol gives better mist and water is more safe at high temperatures.

In view of the effect of the present invention of preventing clogging, the hair spray of the present invention is preferably used for products containing a setting agent resin compound which is liable to be clogged conventionally. The setting agent resin compound is a polymer resin compound, and is an amphoteric polymer resin compound, a cationic polymer resin compound, an anionic polymer resin compound or a nonionic polymer resin compound in which any one or two or more kinds are combined. It can be contained.

The most preferred setting agent resin compound is an amphoteric resin polymer compound. As the amphoteric polymer resin compound, for example, the following general formula “Chemical formula 1”

Embedded image (In the formula, n: m = 2: 8 to 8: 2, the molecular weight is in the range of 50,000 to 500,000. R ¹ and R ⁶ are a hydrogen atom or a methyl group, and R ³ and R ⁴ are 1 to 5.
An alkyl group having 4 carbon atoms, R ² and R ⁵ are an alkylene group having 1 to 4 carbon atoms, and R ⁷ is 1 to
A saturated or unsaturated alkyl group having 24 carbon atoms, A is an oxygen atom or an NH group or none. ) Represented by dialkylaminoethyl acrylate, dialkylaminoethyl methacrylate, diacetacrylamide, etc. and acrylic acid, methacrylic acid, acrylic acid alkyl ester, methacrylic acid alkyl ester, etc.
Compound amphoteric with halogenated acetic acid (a commercially available product includes Yuka Former AM-75 (manufactured by Mitsubishi Chemical Corporation) and the like. ]
Is mentioned.

As the cationic polymer resin compound, for example, poly (dimethyldiallylammonium halide)
Type cationic polymer [Mercoat 10
0 (manufactured by Merck, USA). And dimethyldiallylammonium halide and acrylamide copolymer cationic polymer [a commercially available product such as Mercoat 550 (manufactured by Merck, USA) and the like. And quaternary nitrogen-containing cellulose ethers (as commercially available products, such as polymer JR-400, polymer JR-125, and polymer JR-300M (manufactured by Union Carbide Co., USA). ], A condensate of polyethylene glycol, epichlorohydrin, dipropylene triamine, tallow alkylamine, or a condensate of polyethylene glycol, epichlorohydrin, dipropylene triamine, coconut oil alkylamine [Polycoat H (manufactured by Henkel) as a commercial product] . ], Cationized vinylpyrrolidone / dimethylaminoethyl methacrylate copolymer [as commercially available products, such as Guffcoat 755 and Guffcoat 734 (manufactured by GAF, USA). And the like.

As the anionic polymer resin compound, for example, an acrylic resin alkanolamine which is a copolymer of acrylic acid and / or methacrylic acid and an alkyl acrylate and / or alkyl methacrylate [as a commercial product, There are a size L-33 and a plus size L-53 series (manufactured by Ryo Kagaku). ], A copolymer of methyl vinyl ether and maleic acid monobutyl ester [Gantrez ES-42 as a commercially available product]
5. Gantrez ES-225, Gantrez ES-3
35 (manufactured by GAF) and the like. ], Copolymer of hydroxypropyl acrylate, butylaminoethyl methacrylate, octylamide acrylate [Amphom as commercial product
erLV-71, Amphomer 28-2930 (manufactured by NSC)
Etc. ], A copolymer of vinyl acetate, crotonic acid, and vinyl neodecanoate [a commercially available product, RESYN 28-293]
0 (manufactured by NSC). And the like.

Examples of the nonionic polymer resin compound include polyvinyl alcohol, polyvinyl pyrrolidone,
Carboxymethylcellulose, carboxyvinyl polymer, polyvinylpyrrolidone and copolymer of vinylpyrrolidone and vinyl acetate [PVP-K, PVP
/ VA (manufactured by GAF). ], Vinylpyrrolidone, vinyl acetate, acrylaminoacrylate copolymer and the like.

The amount of the polymer resin compound is 0.1 to 20% by weight, preferably 2% by weight, based on the total amount of the stock solution of the hair cosmetic.
-10% by weight.

The above-mentioned polymer resin compound is usually dissolved in water and / or a solvent of a lower alcohol such as ethanol or propanol, and is added to the hair spray of the present invention. The amount of water and / or lower alcohol is usually in a weight ratio to the polymer resin compound: polymer resin compound: water and / or lower alcohol = 1: 1 to 1: 1.
000.

In the stock solution used in the present invention, depending on the purpose of the product, in addition to the above-mentioned setting agent resin compound, it can be generally incorporated into hair cosmetics in a qualitative and quantitative range which does not impair the effects of the present invention. Ingredients such as silicone-based, hydrocarbon-based, ester-based oils, surfactants, water-soluble polymers, chelating agents, antioxidants, ultraviolet absorbers, preservatives, drugs such as vitamins and hormones, flavors, etc. Can be added.

The aerosol-type hair spray of the present invention is produced by a conventional method by sealing the above-mentioned components in an aerosol can.

[0026]

The present invention will be described below in more detail with reference to examples and comparative examples. The present invention is not limited by these examples. The compounding amount is% by weight.

According to the formulations shown in Tables 1 and 2, an aerosol type super hard hair spray was produced, and (1) hair styling power (setting power), (2) hair styling keeping power (setting continuity), (3) Safety and (4) clogging phenomenon were evaluated by the following evaluation methods.

(1) Hair styling power (setting power) [0028] Sensory evaluation was performed by 50 expert panelists to determine whether hair styling power immediately after application was excellent. (2) Hair-keeping power (set sustaining power) A sensory evaluation was performed by 50 specialized panelists to determine whether or not the hair-dressing power after 6 hours of ordinary daily life was excellent. [Evaluation Criteria] ：: 46-50 expert panelists evaluated as excellent
Man. ：: 41 to 45 specialized panelists evaluated as excellent
Man. Δ: Number of specialized panelists evaluated as excellent is 21 to 40
Man. ×: Number of expert panelists evaluated as excellent is 0 to 20
Man. (3) Safety When the filling rate was set to 50%, the temperature at which the internal pressure reached 1.3 MPa was less than 80 ° C, and the temperature was 80 ° C or more. (4) Clogging phenomenon Each of the 20 samples shown in Examples and Comparative Examples was subjected to 40 ° C.
, And then left at 5 ° C for 24 hours, and then sprayed for 10 seconds. This cycle was carried out until it was completely used, and a sample in which no clogging phenomenon (a state in which the contents were not ejected even when the actuator was pressed) did not occur was evaluated as ○, and a sample in which even one occurred was evaluated as ×.

[Examples 1 to 4, Comparative Examples 1 to 4] [Production method] (1) was added to (5) of the components shown in Table 1.
(2) After adding the raw materials of (3) and (4) and stirring well, the mixture was filled in an aerosol can. This was filled with (6) (without Comparative Examples 1 and 4), further filled with (7) or (8) or (9), and adjusted so that the initial internal pressure at 25 ° C. became the value shown below ( Comparative Example 4 was not adjusted).

[Table 1] * 1: Heterinated dialkylaminoalkyl acrylate copolymer * 2: L. P. G (0.4MPa at 20 ℃)

"Examples 5 to 9 and Comparative Examples 5 to 7" [Production method] The components (8) shown in Table 2 were replaced with (1)
(2) After adding the raw materials of (7) and (3) or (4) or (5) or (6) and stirring well,
Filled into aerosol cans. This was filled with (9) (without Comparative Example 6), further charged with (10) or (11), and adjusted so that the initial internal pressure at 25 ° C. had the following value.

[Table 2] * 1: Heterinated peralkylaminoalkyl acrylate copolymer * 2: Phenol peroxyl, permethylaminoethyl methacrylate copolymer cationized product * 3: Vinyl acetate, crotonic acid, phenyl neotanoate copolymer * 4: Phenyl acetate, phenol peroxyl Copolymer

From the results shown in Tables 1 and 2, the Examples of the present invention are excellent aerosol hair sprays having excellent hair styling and hair styling abilities, high safety, and no clogging phenomenon. You can see that.

[0032]

According to the present invention, it is possible to provide an aerosol type hair spray which has high safety at high temperatures and does not cause clogging even when a setting agent resin compound is blended.

Claims (2)

[Claims] An undiluted solution, isopentane and a compressed gas are contained, and the weight ratio of the undiluted solution and isopentane is 99.9 to 0.1.
~ 80: 20 and finally the initial internal pressure is 2
An aerosol-type hair spray, which is 0.5 to 1.0 MPa at 5 ° C. 2. The aerosol hair spray according to claim 1, wherein said stock solution contains a setting agent resin compound.