Aerosol composition

Abstract

To provide an aerosol composition that allows easy and uniform mixing of a base liquid composition and a propellant even at low temperatures, and exhibits superior foam-forming ability.SOLUTION: An aerosol composition according to the present invention is an aerosol composition that becomes foamy upon discharge, and contains (A) a polyoxyethylene fatty acid ester having an HLB of 6 to 8, (B) a polyoxyethylene alkyl ether having an HLB of 8 to 10, and (C) a propellant.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an aerosol composition.

Background Art

[0002] Conventionally, foamy aerosol compositions have been used in many fields including cosmetics in terms of simplicity and the like. There are various types of foamy aerosol compositions, such as those that form foam immediately after ejection, those that form foam after a while after ejection, and those that form foam after spraying the stock solution in a spray form. In any case, the fineness of the foam and the persistence of the foam are emphasized. However, at low temperatures such as in winter, the pressure of the propellant decreases, so the foam-forming property of the ejected foam tends to decrease.

[0003] Therefore, for example, as described in Patent Document 1, by including an amine oxide group-containing resin and a branched-chain fatty acid alkanolamide in a foamy aerosol composition, the foam-forming property at low temperatures is improved. However, in a foamy aerosol composition containing a stock solution composition and a propellant, it is difficult to form good foam unless the stock solution composition and the propellant are uniformly mixed. Therefore, in products that require stirring before use for the purpose of homogenizing the stock solution composition and the propellant, since the viscosity of the stock solution composition increases at low temperatures, strong stirring may be required.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Therefore, in a foamy aerosol composition that requires stirring before use for homogenization of the stock solution composition and the propellant, a foamy aerosol composition is desired in which the stock solution composition and the propellant can be easily and uniformly mixed even at low temperatures, and the foam-forming property is good.

[0006] The present invention has been made in view of the above circumstances, and an object thereof is to provide an aerosol composition that can easily and uniformly mix a stock solution composition and a propellant even at low temperatures and has good foam-forming properties.

Means for Solving the Problems

[0007] As a result of intensive studies to achieve the above problems, the present inventor has found that the above problems can be achieved by blending a specific polyoxyethylene fatty acid ester, a polyoxyethylene alkyl ether, and a propellant into an aerosol composition, and has completed the present invention.

[0008] The aerosol composition according to the present invention is an aerosol composition that becomes foamy upon discharge, and contains (A) a polyoxyethylene fatty acid ester having an HLB of 6 to 8, (B) a polyoxyethylene alkyl ether having an HLB of 8 to 10, and (C) a propellant.

[0009] Due to such a configuration, the aerosol composition according to the present invention can easily and uniformly mix the stock solution composition and the ejectant even at low temperatures, and can have good foam-forming properties.

[0010] The aerosol composition according to the present invention may further contain (D) alkyl glucoside.

Effects of the Invention

[0011] According to the present invention, it is possible to provide an aerosol composition that can easily and uniformly mix a stock solution composition and a propellant even at low temperatures and has good foam-forming properties.

Modes for Carrying Out the Invention

[0012] Hereinafter, embodiments of the present invention will be described in detail, but the present invention is not limited to the following embodiments. The present invention is not limited to each configuration described below, and various modifications are possible within the scope shown in the claims. Embodiments and examples obtained by appropriately combining the technical means disclosed in different embodiments and examples are also included in the technical scope of the present invention. Further, unless otherwise specified in this specification, "A~B" representing a numerical range is intended to mean "A or more and B or less".

[0013] In this specification, "low temperature" means a temperature of 10°C or lower.

[0014] The aerosol composition according to this embodiment becomes foamy when discharged from a container. The aerosol composition according to this embodiment contains (A) a polyoxyethylene fatty acid ester having an HLB of 6 to 8, (B) a polyoxyethylene alkyl ether having an HLB of 8 to 10, and (C) a propellant.

[0015] Component (A) used in the aerosol composition according to this embodiment is a polyoxyethylene fatty acid ester having an HLB of 6 to 8. The polyoxyethylene fatty acid ester is a nonionic surfactant blended together with component (B) described below for the purpose of easily making the stock solution composition and the propellant described below uniform by stirring before foam discharge in a low-temperature environment. Examples of the polyoxyethylene fatty acid ester having an HLB of 6 to 8 include PEG-3 isostearate, PEG-8 diisostearate, PEG-12 diisostearate, etc. Further, commercially available products of these polyoxyethylene fatty acid esters can be used. Specific examples of commercially available products include EMALEX PEIS-3, EMALEX400di-IS, EMALEX600di-IS (all manufactured by Nippon Emulsion Co., Ltd.), Nonion DIS-400, Nonion DIS-600 (all manufactured by NOF Corporation), etc.

[0016] In the aerosol composition according to this embodiment, a polyoxyethylene fatty acid ester having an HLB of 6 to 8 can be used alone or in combination of two or more. As the blending amount, 0.01 to 5% by mass (hereinafter abbreviated as %) is preferable with respect to the total amount of the aerosol composition, and more preferably 0.5 to 2.5%. If the blending amount of the polyoxyethylene fatty acid ester is 0.01% or more, the stock solution composition and a propellant described later can be sufficiently and uniformly mixed. Further, if the blending amount of the polyoxyethylene fatty acid ester is 5% or less, an increase in the viscosity of the aerosol composition can be suppressed.

[0017] Component (B) used in the aerosol composition according to this embodiment is a polyoxyethylene alkyl ether having an HLB of 8 to 10. The polyoxyethylene alkyl ether is a nonionic surfactant blended together with component (A) for the purpose of easily making the stock solution composition and a propellant described later uniform by stirring before foam discharge in a low-temperature environment. Examples of the polyoxyethylene alkyl ether having an HLB of 8 to 10 include ceteth-5, isoceteth-5, oleth-5, oleth-6, steareth-4, steareth-5 steareth-6, steareth-8, isosteareth-5, decyltetradeceth-10, PPG-4 ceteth-1, PPG-6 decyltetradeceth-12, and the like. Further, commercially available products of these polyoxyethylene alkyl ethers can be used. Specific examples of commercially available products include EMALEX 605, EMALEX 606, EMALEX 608, EM ALEX 1805, EMALEX 2410 (all manufactured by Nippon Emulsion Co., Ltd.), NIKKOL BS-4, NIKKOL PBC-31, NIKKOL PEN-4612 (all manufactured by Nikko Chemicals Co., Ltd.), and the like.

[0018] In the aerosol composition according to this embodiment, a polyoxyethylene alkyl ether having an HLB of 8 to 10 can be used alone or in combination of two or more. As the blending amount, 0.01 to 3% is preferable, and more preferably 0.1 to 1% with respect to the total amount of the aerosol composition. If the blending amount of the polyoxyethylene alkyl ether is 0.01% or more, the stock solution composition and the propellant described later can be sufficiently and uniformly mixed. Further, if the blending amount of the polyoxyethylene alkyl ether is 3% or less, an increase in the viscosity of the aerosol composition can be suppressed.

[0019] The component (C) used in the aerosol composition according to this embodiment is a propellant. There is no particular limitation on the propellant. For example, hydrocarbons such as liquefied petroleum gas (LPG) mainly composed of propane, n-butane, i-butane, etc., ethers such as dimethyl ether, methyl ethyl ether, diethyl ether, etc., carbon dioxide gas, nitrogen gas, compressed gases such as oxygen can be mentioned. These propellants can be used alone or in combination of two or more, and as the blending amount, 0.5 to 60% is preferable, and 3.0 to 20% is particularly preferable with respect to the total amount of the aerosol composition. If the blending amount of the propellant is 0.5% or more, foam can be sufficiently formed. Further, if the blending amount of the propellant is 60% or less, the foaming property, the fineness of the foam, and the persistence of the foam can be made good.

[0020] The aerosol composition according to this embodiment may contain alkyl polyglucoside as the component (D). Alkyl polyglucoside is a nonionic surfactant composed of a condensate of a higher alcohol and a glucose polymer, and at low temperatures, it further promotes the foaming of the aerosol composition discharged from the container. Alkyl polyglucoside includes those also referred to as alkyl glucoside and alkyl polyglycoside. Examples of alkyl polyglucoside include decyl glucoside, lauryl glucoside, myristyl glucoside, cocooyl glucoside, etc. These alkyl polyglucosides can use commercially available products. Specifically exemplifying commercially available products, there are Plantacare series such as Midol 10, Midol 12 (both manufactured by Kao Corporation), Plantacare 2000UP, Plantacare 1200UP, Plantacare 818UP, Plantacare 800UP (all manufactured by BASF Corporation), etc.

[0021] In the aerosol composition according to this embodiment, alkyl polyglucoside can be used alone or in combination of two or more. As the blending amount, 0.01 to 3% is preferable with respect to the total amount of the aerosol composition, and more preferably 0.1 to 1%.

[0022] In addition to the above essential components, the aerosol composition according to this embodiment may, if necessary, contain components generally used in aerosol compositions, for example, other surfactants, polymer compounds, oils and fats, powders, silicones, pH adjusters, moisturizers, ultraviolet absorbers, ultraviolet dispersants, pigments, liquid alcohols, plant extracts, bactericides, preservatives, antioxidants, chelating agents, drugs, fragrances, etc., within a range that does not impair the effects of the present invention.

[0023] As the uses of the aerosol composition according to this embodiment, as cosmetics, there are hair cosmetics such as hair styling agents, treatments, shampoos, rinses, etc., makeup bases, beard trimmers, unwanted hair treatment agents, cleansing, etc. for skin cosmetics. In addition to cosmetics, it can also be used for animal cosmetics, etc.

Examples

[0024] Next, the present invention will be described in detail with reference to examples, but the present invention is not limited thereby. It is not limited by this.

[0025] The test methods for the foam formation property at low temperature and the ease of uniform stirring at low temperature shown in the examples and comparative examples are as follows. Also, the blending amounts of the compositions shown in the following table are each shown in mass%.

[0026] (Foam formation property at low temperature) The evaluator ejected each sample in a room maintained at 0°C and visually observed the foam formation property. The evaluation criteria are as follows. ◎: Very good ○: Good ×: Bad

[0027] (Ease of uniform stirring at low temperature) The evaluator tilted each sample left and right in a room maintained at 0°C and observed at which turn the sample became uniform. The evaluation criteria are as follows. ◎: No need for stirring 〇: Becomes uniform with 3 or fewer turns. △: Requires 4 or more turns. ×: Does not become uniform with about 10 turns and needs to be strongly shaken.

[0028] Examples 1 to 3 and Comparative Examples 1 and 2 (hair styling agents) Foamy hair styling agents having the blending compositions described in Table 1 were prepared by a conventional method, and the above tests were carried out. The results are shown in Table 1 and FIG. 1.

[0029]

Table 1

[0030] As is clear from Table 1, both of the aerosol compositions of Examples 1 and 2 showed excellent performance. On the other hand, in Comparative Examples 1 to 3, they were inferior in terms of foam formation at low temperatures and ease of uniform stirring at low temperatures, and the object of the present invention could not be achieved. Further, the hair styling agents of the examples also had sufficient properties with respect to foam elasticity, fineness of the foam, setting power, holding power, and ease of stretching on the hair.

Industrial Applicability

[0031] The aerosol composition of the present invention can easily and uniformly mix the stock solution composition and the propellant even at low temperatures, and can make the foam formability good. Therefore, it is useful for those who handle aerosol compositions.

Claims

1. An aerosol composition that becomes foamy upon ejection, (A) a polyoxyethylene fatty acid ester having an HLB of 6 to 8, (B) a polyoxyethylene alkyl ether having an HLB of 8 to 10, (C) a propellant, containing, an aerosol composition.

2. Furthermore, (D) an alkyl glucoside is contained, the aerosol composition according to claim 1.

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