JP2001278749A - Aerosol composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an aerosol composition which can smoothly be used to the last even in a handstand method without changing the viscosity of a content substance with time and exhibits smooth glossy finishing free from greasy touch and excellent usefulness. SOLUTION: This aerosol composition is obtained by including the water- based raw solution containing water, a higher alcohol and a surfactant and the aerosol propellant containing a liquefied gas and a compressed gas. The weight ratio between the above water-based raw solution and the above liquefied gas is 99:1 to 67:33, the water-based raw solution contains the surfactant in a proportion of 0.01-6.0 wt.% and dimethyl ether is included as the liquefied gas in a proportion of 1-33 wt.% based on the total amount of the water-based raw solution and the liquefied gas. Further, behenyl alcohol is added, as the higher alcohol, to adjust the melting point of the water-based raw solution at higher than 50 deg.C lower than 80 deg.C when measured by a differential scanning calorimeter(DSC).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an aerosol composition, and more particularly to an aerosol composition suitable for use as a foam aerosol (foam).

[0002]

2. Description of the Related Art Conventionally, foam preparations include cosmetics for hair, shampoos, hair dyes, shaving creams, and the like.
The fineness of fineness, the way of foam disappearance, etc. are devised according to each application, especially the aerosol composition which is glossy, has the fineness of soft creamy texture, and gives a good discharge of foam Is desired. In recent years, from the point of usability, a foam aerosol composition of a so-called inverted specification has been developed which inverts a container and discharges the contents when applied to hair or the like when applied to hair, etc., and has been widely used because of its ease of use. I have.

[0003]

In recent years, it has become glossy,
As an aerosol composition having a fine texture like a soft cream and excellent in usability, a composition in which a specific amount of dimethyl ether is blended as a liquefied gas has been developed (JP-A-8-253409). However, when the above technology is applied to a foam aerosol composition of an inverted specification, the viscosity increases due to a temperature change in a normal living condition, and the undiluted solution does not drop even when inverted, and it is difficult to use while continuing to use. Had the disadvantage of becoming

[0004]

The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, contained a higher alcohol as an essential component in an aqueous stock solution and controlled the type of the higher alcohol. By setting the melting point of the aqueous stock solution to a specific range as measured by a differential scanning calorimeter (DSC), the viscosity of the content does not change over time, and an aerosol composition that can be used smoothly to the end is obtained. I found what I could get.

That is, the present invention comprises an aqueous stock solution containing water, a higher alcohol and a surfactant, and a propellant containing a liquefied gas and a compressed gas, wherein the weight ratio of the aqueous stock solution to the liquefied gas is 99%. : 1 to 67:33, wherein the aqueous stock solution contains 0.01 to 6.0% by weight of a surfactant,
An aerosol composition containing dimethyl ether as a liquefied gas in an amount of 1 to 33% by weight based on the total amount of the aqueous stock solution and the liquefied gas, wherein the aqueous stock solution has a melting point measured by a differential scanning calorimeter (DSC). Is 50 ℃ or more, 8
An aerosol composition characterized by having a temperature of 0 ° C. or lower.

In the present invention, water in an aqueous stock solution is a component as a solvent for forming foams, and a surfactant is a component for stabilizing foaming or foams and adjusting the melting point of the aqueous stock solution. Yes, higher alcohol is a component that improves the shape retention of foam, forms smooth foam, and adjusts the melting point of the aqueous stock solution.

Examples of the surfactant used in the present invention include polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbite fatty acid ester, polyethylene glycol fatty acid ester, sorbitan fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene hydrogenated castor oil, and polyoxyethylene sorbitan. Nonionic types such as oxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene alkylamine and fatty acid amide; alkyl sulfate, polyoxyethylene alkyl ether sulfate, N-acyl Amino acid salt, N-
Acyl methyl taurate, polyoxyethylene alkyl ether acetate, alkyl sulfocarboxylate, α-olefin sulfonate, alkyl phosphate, polyoxyethylene alkyl ether phosphate, lauric acid, myristic acid, palmitic acid, stearin Acid, oleic acid,
Anionic forms such as higher fatty acid soaps such as behenic acid; cationic forms such as alkyl ammonium salts and alkyl benzyl ammonium salts; amphoteric forms such as betaine acetate, imidazolium betaine and lecithin;
LB value of 10 or more non-ionic, anion, cation,
One or more of amphoteric and other ionic foams having high foaming properties are used. Among them, particularly preferred is polyoxyethylene polyoxypropylene alkyl ether.

[0008] The amount of the surfactant of the present invention is preferably 0.01 to 6.0% by weight, particularly preferably 0.05 to 0.7% by weight, based on the total amount of the aqueous stock solution. . If the amount of the surfactant is too small, sufficient foam cannot be obtained, while if it is too large, there are problems such as stickiness and residue on the coated surface.

The kind and amount of the higher alcohol used in the present invention are selected such that the melting point of the whole aqueous stock solution is 50 ° C. or more and 80 ° C. or less when measured by a differential scanning calorimeter (DSC). Any one may be used as long as it is included. Particularly preferred is one containing behenyl alcohol, and particularly preferred is one containing behenyl alcohol in an amount of 50% by weight or more based on the total amount of higher alcohols. Further, when emulsification is performed using a higher alcohol containing behenyl alcohol and POE (15) POP (1) behenyl ether having a low stimulus and a melting point of 50 ° C. or more as a surfactant, the emulsifiability of the behenyl alcohol is improved. This is more effective because a gel having a melting point can be obtained.

In the present invention, if the melting point of the whole aqueous stock solution is lower than 50 ° C., recrystallization of higher alcohol is repeated due to a change in temperature which can occur in a normal living condition, and the viscosity of the system itself increases. However, it is difficult to use the inverted aerosol because the undiluted solution does not fall even if it is inverted. If the viscosity of the system is not too high by adjusting the amount of higher alcohol, etc., the shape retention of the foam will be worse, only the creamed dark part will clump, and it will be uniform with ordinary shaking This makes it unsuitable as an aerosol stock solution. On the other hand, when the melting point of the entire aqueous stock solution exceeds 80 ° C., the viscosity decreases due to shear, and the foam quality deteriorates.

The aerosol composition of the present invention preferably contains behenyl alcohol and cetanol as higher alcohols. By blending cetanol, a decrease in viscosity due to shear is alleviated, and viscosity stability is further improved.

The blending amount of the higher alcohol of the present invention is preferably 0.005 to 6.0% by weight, particularly preferably 1.0 to 3.0% by weight, based on the total amount of the aqueous stock solution.

In the present invention, the melting point is measured by a differential scanning calorimeter (D).
SC). As the differential scanning calorimeter (DSC), for example, DSC 100 manufactured by Seiko Denshi Kogyo KK is exemplified.

The aerosol composition of the present invention is preferably blended with an oil component from the viewpoint of improving usability. Among the oil components, it is preferred to blend a silicone oil component, particularly an amino-modified high molecular silicone. When the amino-modified polymer silicone is blended by a non-aqueous emulsification method, the feel when applied to hair is good, and the durability of gloss is increased. Other oils include, for example, ester oils. The blending amount of the oil component is preferably 1 to 10% by weight in the aqueous stock solution.

In the aerosol composition of the present invention, in addition to the above components, a monohydric lower alcohol such as ethanol, isopropyl alcohol, propylene glycol, ethylene glycol, diethylene glycol, triethylene glycol may be contained in the stock solution, if necessary. , Glycerin, polyhydric alcohols such as 1,3-butylene glycol,
In addition, various effective ingredients such as thickeners, resins, emollients / fatting agents such as various esters, oil phase components, emulsifiers, humectants, preservatives, and hydrolyzed collagen can be appropriately contained.

In the present invention, the liquefied gas is a component for foaming, improving the shape retention of the foam, and discharging the contents. The liquefied gas is used to give a finer, glossy, foam-like discharge material to be applied to the hair. Dimethyl ether is used as an essential component in that it can be easily and uniformly blended over a wide range and can prevent excessive application, but liquefied petroleum gas (LPG) and the like can also be used.

In the present invention, the compressed gas is a propellant for ejecting the contents from the aerosol container, and is slightly dissolved in the liquefied gas and the aqueous stock solution, and generates foam when the contents are released into the atmosphere. Components, for example, carbon dioxide gas, nitrogen gas, air, oxygen gas, nitrous oxide gas, helium gas, neon gas, and argon gas.The solubility in aqueous undiluted solution is superior to others. Gas is particularly preferred.

In the aerosol composition of the present invention, water,
It is necessary that the weight ratio of the aqueous stock solution containing the higher alcohol and the surfactant to the liquefied gas is 99: 1 to 67:33. If the ratio of the liquefied gas is less than the lower limit, sufficient foam cannot be obtained, and if the ratio exceeds the upper limit, the amounts of water and surfactant become small, and it becomes difficult to form foam. The weight ratio between the aqueous stock solution and the liquefied gas is 98: 2 to 70:
It is preferably 30.

The aerosol composition of the present invention must contain dimethyl ether as a liquefied gas in an amount of 1 to 33% by weight based on the total amount of the aqueous stock solution and the liquefied gas. When the proportion of dimethyl ether is less than the lower limit,
If the shape retention of the foam is deteriorated, and if the upper limit is exceeded, the foam becomes coarse and the gloss is lost. The proportion of dimethyl ether is preferably 2 to 30% by weight based on the total amount of the aqueous stock solution and the liquefied gas.

The aerosol composition of the present invention can be produced by pressurizing and sealing a compressed gas in an aerosol container containing an aqueous stock solution containing water, a higher alcohol and a surfactant, and a liquefied gas. At this time, the degree of pressurization of the compressed gas at 25 ° C. is preferably 3.0 to 7.0.
kg / cm ² , more preferably 6.0-7.0 kg / c
m ² .

The aerosol composition of the present invention is preferably an aerosol composition used in an inverted specification of a foam aerosol, and more preferably a hair aerosol composition used in an inverted specification.

[0022]

Next, the present invention will be described in more detail with reference to Examples and Comparative Examples of the aerosol composition of the present invention, but these do not limit the present invention in any way. In the following examples, “%” indicates “% by weight” unless otherwise specified, and numerical values in the composition table also indicate “% by weight”.

Examples 1 to 4 and Comparative Example 1 Aerosol compositions were prepared by a conventional method using aqueous stock solutions having the compositions shown in Table 1, and used as Examples 1 to 4 and Comparative Example 1. The amino-modified polymer silicone is prepared by adding an amino-modified polymer silicone to polyoxyethylene hydrogenated castor oil and 1,3-butylene glycol, emulsifying the mixture, and adding water thereto, and mixing the resulting mixture with water. Was prepared and used. The aqueous stock solution is 1 in total according to the formulation shown in Table 1.
Dimethyl ether (DM
The ratio (weight ratio) of E) to the aqueous stock solution is the aqueous stock solution / DME =
After mixing to 96/4, the mixture was mixed with carbon dioxide at 0.6M.
Pressurized to Pa.

[0024]

[Table 1] 例 Examples Comparative Examples Compounding ingredients ────── ─── ─── 1 2 3 4 1 ────────────────────────────────── Ion exchange water Residue Residue Residue Residual Residue 95% ethanol 3.0 3.0 3.0 3.0 3.0 Deodorized cetanol--0.2 0.8 0.8 Stearyl alcohol----0.8 Behenyl alcohol 1.6 1.6 1.4 0.8-Isostearyl alcohol-0.2---Alkyltrimethylammonium chloride * 1 0.2 0.2 0.2 0.2- POE (15) POP (1) Behenyl ether 0.5 0.5 0.5 0.5-Polyoxyethylene lauryl ether (12EO)----3.0 POE hydrogenated castor oil * 2 1.0 1.0 1.0 1.0-Di-2-ethylhexyl succinate 4.0 4.0 4.0 4.0- Octyl palmitate 1.0 1.0 1.0 1.0-Amino Liquid silicone polymer * 3 2.0 2.0 2.0 2.0-Liquid paraffin----10.0 1,3-butylene glycol 3.0 3.0 3.0 3.0 3.0 Polyoxypropylene glyceryl ether 0.1 0.1 0.1 0.1 0.1 Vinylpyrrolidone / N, N-dimethylaminoethyl Methacrylic acid copolymer 6.0 6.0 6.0 6.0 10.0 Preservative 0.3 0.3 0.3 0.3 0.3 Fragrance 0.05 0.05 0.05 0.05 0.05 ─────────────────────────── ───────

* 1: Catinal BTC-80 (77%, manufactured by Toho Chemical Co., Ltd.) * 2: Emalex HC-60 (manufactured by Nippon Emulsion Co., Ltd.) * 3: 10% amino-modified high-molecular silicone and 90% methylpolysiloxane Mixture of

For each of the obtained aerosol compositions,
(1) viscosity, (2) melting point as measured by differential scanning calorimeter (DSC), (3) solidification of creaming part, (4) compatibility with inverted use, (5) foam quality,
It was measured by the following method. Table 2 shows the results.

(1) Viscosity The viscosities are the viscosity on the day of preparation, the viscosity on the day after preparation, the viscosity when a plateau occurs over time (stable viscosity), and the viscosity after stirring the prepared and stabilized sample for 5 hours. (Shear viscosity) was measured after further standing for 3 days.

(2) Melting point as measured by a differential scanning calorimeter (DSC) The melting point was measured using a DSC 100 manufactured by Seiko Instruments Inc.

(3) Presence or absence of solidification of the creaming portion The presence or absence of solidification of the creaming portion is based on the following criteria. ：: Not solidified. ×: Solidified.

(4) Suitability for Inverted Use Suitability for inverted use is based on the following criteria. ：: Suitable. ×: Not suitable.

(5) Foam quality The foam quality was determined by measuring the shape retention of the foam according to the following criteria. ◎: Good. ：: Somewhat good. □: Slightly weak. Δ: Weak. ×: Very weak.

Table 2 shows the evaluation results. As can be seen from the results, the aerosol composition according to the present invention has no apparent solidification of the creaming portion as compared with Comparative Example 1, and is suitable for inverted use. Further, as can be seen from Examples 3 and 4, by combining cetanol, the decrease in viscosity due to shear was alleviated, and since the melting point remained high, there was no solidification and the foam quality was improved.

[0033]

[Table 2] 例 Example Comparative example ───────── ── ───── 1 2 3 4 1 粘度 Viscosity (unit: mPa・ S) The day of preparation 715 965 1693 1975 3000 The day after preparation 1955 1325 2780 3000 4200 Stable viscosity 3080 2270 2820 2650 5650 Shear viscosity 155 100 360 520 3250 After standing for 3 days 145 113 488 775 4500 DSC measurement (° C) 68.9 68.7 67.6 66.2 37.4 Presence or absence of solidification of creaming part ○ ○ ○ ○ × Compatibility with inverted use ○ ○ ○ ○ × Foam □ △ ○ ◎ ◎ ─────────────────── ──────────────

Examples 5 to 10 Aerosol compositions were prepared by a conventional method using aqueous stock solutions having the compositions shown in Table 3 to obtain Examples 5 to 10. The amino-modified polymer silicone used was non-aqueous emulsified with polyoxyethylene-hardened castor oil in advance. The aqueous stock solution was prepared according to the formulation shown in Table 1 so as to be 100% in total, and mixed so that the ratio (weight ratio) of dimethyl ether (DME) to the aqueous stock solution was 96/4. , And pressurized to 0.6 MPa with carbon dioxide gas.

[0035]

[Table 3] {Example 5 6 7 8 9 10} ──────────────────────────────── Deionized water Residue Residue Residue Residue Residue Residue 95% ethanol 3.0 3.0 3.0 3.0 3.0 3.0 Deodorized cetanol 0.8 0.8 0.8 0.8 0.8 0.8 Behenyl alcohol 0.8 0.8 0.8 0.8 0.8 0.8 POE (15) POP (1) Behenyl ether 3.0-----Polyoxyethylene lauryl ether (12EO)-3.0 2.0 3.0 3.0 3.0 POE hydrogenated castor oil * 2-----1.0 Liquid paraffin---10.0--Liquid lanolin--1.0---Glyceryl trioctanoate----10.0 8.0 Octyl palmitate 2.5 2.5 2.5---Amino-modified silicone * 3-- − − − 2.0 1,3-butylene glycol 3.0 3.0 3.0 3. 0 3.0 3.0 Polyoxypropylene glyceryl ether 0.1 0.1 0.1 0.1 0.1 0.1 Vinylpyrrolidone / N, N-dimethylaminoethyl methacrylic acid copolymer 6.0 6.0 6.0 6.0 6.0 6.0 Preservative 0.3 0.3 0.3 0.3 0.3 0.3 Fragrance 0.05 0.05 0.05 0.05 0.05 0.05 0.05 ───────────────────────────────────

* 2: Emarex HC-60 (manufactured by Nippon Emulsion Co., Ltd.) * 3: Mixture of 10% amino-modified high-molecular silicone and 90% methylpolysiloxane

The usability of each of the obtained aerosol compositions when applied to hair includes (1) smoothness,
The following criteria were evaluated for (2) suppleness, (3) non-stickiness, and (4) gloss. Table 4 shows the results. The emulsified state and foam quality were all good. The DSC measurement (° C.) was in the range of 51 to 75, and the viscosity was stable.

(1) Smoothness 2 g of a sample was applied to a hair strand (4 g), the shape was adjusted with a comb, and immediately and 6 hours later, the smoothness of the hair strand was organoleptically evaluated. : Smooth. ：: Almost smooth. Δ: Not very smooth. ×: Not smooth.

(2) Flexibility In the same manner as in (1) above, the flexibility of the hair strand was sensory evaluated immediately after and 6 hours later. : Supple. ：: Almost supple. Δ: Not very supple. ×: Not flexible.

(3) Stickiness of Hand 1 g of a sample was taken on the palm of the hand, and rubbed with the hand for 30 seconds. ：: Not sticky at all. ：: Almost no stickiness. Δ: There is some stickiness. ×: There is considerable stickiness.

(4) Gloss of Hair In the same manner as in (1) above, the gloss of the hair strand was subjected to a sensory evaluation immediately after and 6 hours later. ◎: There is gloss. ：: There is a gloss. Δ: There is no gloss. ×: There is no gloss.

[0042]

[Table 4]

[0043]

As described above, the aerosol composition of the present invention does not change the viscosity of the content over time, can be used smoothly even in an inverted specification, and has a smooth, non-sticky finish. It is shiny and has excellent usability.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4C083 AB051 AB052 AB131 AC022 AC071 AC092 AC102 AC122 AC171 AC182 AC352 AC372 AC422 AC432 AC692 AD092 AD161 AD162 AD512 BB01 BB11 BB49 CC21 CC31 CC36 CC38 DD08 DD27 EE01 EE03 EE06

Claims (7)

[Claims] 1. An aqueous stock solution containing water, a higher alcohol and a surfactant, and a propellant containing a liquefied gas and a compressed gas, wherein the weight ratio of the aqueous stock solution to the liquefied gas is 99: 1 to 1. 67:33, the aqueous stock solution contains 0.01 to 6.0% by weight of a surfactant, and dimethyl ether as a liquefied gas contains 1 to 33% by weight based on the total amount of the aqueous stock solution and the liquefied gas. An aerosol composition, wherein the aqueous stock solution has a melting point of 50 ° C. or more and 80 ° C. or less as measured by a differential scanning calorimeter (DSC). 2. The aerosol composition according to claim 1, wherein the higher alcohol contains behenyl alcohol. 3. The aerosol composition according to claim 1, wherein the higher alcohol contains behenyl alcohol and cetanol. 4. The aerosol composition according to claim 1, wherein the aqueous stock solution further contains an oil component. 5. The aerosol composition according to claim 1, wherein the oil contains an amino-modified silicone. 6. The aerosol composition according to claim 1, wherein the compressed gas is carbon dioxide. 7. The aerosol composition according to claim 1, which is an aerosol composition for hair used in an inverted specification.