JP3160327B2 - Hair cosmetics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair cosmetic, and more particularly, to an excellent setting property and finish when sprayed on hair using a spray container containing a specific acrylic polymer and not using a propellant. The present invention relates to a hair cosmetic having a property and a good feel upon use.

[0002]

2. Description of the Related Art In recent years, destruction of the ozone layer on the earth has been regarded as an important environmental issue, and liquefied petroleum gas has been used as a substitute propellant for CFC gas which is presumed to be the cause. However, this liquefied petroleum gas still emits volatile organic compounds into the atmosphere, and thus still has a problem of causing environmental pollution and global warming. In addition, liquefied petroleum gas has a disadvantage that it is dangerous in use because it is flammable at high pressure.

[0003] In recent years, in view of such environmental awareness, in the United States and Europe, hair cosmetics using containers such as pumps which do not use a propellant have been on the increase, and resource saving and recycling of containers have been activated. ing. Under such circumstances, various studies have been made on hair cosmetics using a continuous injection system without using a propellant.

[0004] Conventionally, foggy hair cosmetics which do not use a propellant include polyvinylpyrrolidone (PVP) polymer compounds, vinyl acetate polymer compounds, acidic acrylic polymer compounds, amphoteric acrylic polymer compounds and the like. Is used. The film-forming resin generally has an average molecular weight of 5 to improve the setting power of the hair.
Those having a high molecular weight of 000 or more are used, and in recent years, they have been incorporated in hair cosmetics at a high concentration of 5% by weight or more for the purpose of imparting variations to the front hairstyle and the like.

However, when a high-molecular-weight film-forming resin is used in such a high concentration, the viscosity of the hair cosmetic solution itself becomes high, so that a sufficiently fine mist can be obtained with an aerosol type using a propellant. However, in the case of the spray type that does not use a propellant, there is no particle destruction due to the gas after spraying, so that the hair cosmetic does not form a mist and the average particle diameter is as large as 80 μm or more, and a good finish cannot be obtained. was there.

Therefore, at present, the film-forming resin is blended up to about 4% by weight, which is the limit for obtaining a mist, and the particles are large and coarse, and the finished feeling and feel of the style are not sufficient. Although the priority is given to the property or the amount of the film-forming resin is reduced to 2% by weight or less, the hair setting property is inferior, but a relatively fine mist is obtained, and the finish of the style and the feel in use are emphasized. Either type of hair cosmetics is dominant.

As an invention relating to these points, for example, US Pat. No. 4,939,198 discloses a method for obtaining a low-viscosity, high-concentration polymer of an acidic vinyl ether-based polymer compound (alkyl vinyl ether / alkyl maleic anhydride half-ester copolymer). Is disclosed. U.S. Pat. No. 4,954,336 discloses a pump hair spray composition using this polymer, and further, U.S. Pat. No. 4,496,192.
No. 1 discloses a pump spray composition for a terpolymer obtained by copolymerizing a saturated bicyclic (meth) acrylate monomer with a similar polymer used in a water / ethanol mixed solvent system. However, none of these was sufficiently satisfactory in terms of the particle size of the mist when sprayed, the setting of hair, and the feeling of finish.

[0008]

Therefore, when the hair is sprayed using a spray container without a propellant, it becomes a mist having a small particle size, has a good finish, and has a good feel upon use. In addition, there has been a demand for the development of a hair cosmetic composition having excellent hair setting properties.

[0009]

Means for Solving the Problems Under such circumstances, the present inventors have conducted intensive studies, and as a result, have found that the above-mentioned problems can be solved by using an acrylic polymer having a specific film forming property. Completed the invention.

That is, the present invention relates to (meth) acrylamide monomer-alkyl (meth) acrylate monomer- (meth) acrylamide and / or (meth) acrylate monomer having tertiary amino group- ( A film-forming acrylic polymer having an average molecular weight of 10,000 to 50,000 formed by quaternary copolymerization of a (meth) acrylic acid hydroxy group- or methoxy group-substituted alkyl ester monomer was prepared by mixing water / ethanol in 2 / 98-30.
The present invention provides a hair cosmetic for hairdressing, which is dissolved and dispersed in a solvent consisting of / 70 and filled in a spray container not using a propellant.

(Meth) acrylamide monomer-alkyl (meth) acrylate monomer of the present invention- (meth) acrylamide and / or (meth) acrylate monomer having a tertiary amino group-
As a quaternary copolymer of a (meth) acrylic acid hydroxy group- or methoxy group-substituted alkyl ester monomer (hereinafter abbreviated as “acrylic polymer (c)”), JP-A-2
A quaternary copolymer described in JP-A-180911 can be used, and in particular, a (meta) compound represented by the following general formula (4)
A repeating unit derived from an acrylamide monomer, a repeating unit derived from an alkyl (meth) acrylate monomer represented by the following general formula (2), and a tertiary amino group represented by the following general formula (5) ) A repeating unit derived from an acrylamide-based and / or (meth) acrylate-based monomer and a repeating unit derived from a (meth) acrylic acid hydroxy- or methoxy-substituted alkylester-based monomer represented by the following general formula (6): The blocks may be connected in any order or randomly.

[0012]

[0013]

[0014]

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Wherein R ² represents a hydrogen atom or a methyl group, and R ³ represents an alkyl group having 1 to 4 carbon atoms.

[0016]

[0017]

[0018]

[0019]

[0020]

[0021]

[0022]

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Wherein R ⁶ represents a hydrogen atom or a methyl group, and R ⁷ represents a hydrogen atom or an alkyl group having 4 to 12 carbon atoms.

[0024]

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Wherein R ⁸ represents a hydrogen atom or a methyl group, R ⁹ represents an alkylene group having 2 to 3 carbon atoms, R ¹⁰ and R ¹¹ are the same or different and represent a methyl group or an ethyl group, a represents 0 or 1]

[0026]

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Wherein R ¹² represents a hydrogen atom or a methyl group; R ¹³ and R ¹⁴ represent different alkylene groups having 2 to 4 carbon atoms; R ¹⁵ represents a hydrogen atom or a methyl group; d represents a number of 0 to 50, but b and d are not simultaneously 0.

Specific examples of the (meth) acrylamide monomer in the acrylic polymer (c) include, for example, (meth) acrylamide, Nn-butyl (meth) acrylamide, Nt-butyl (meth) acrylamide, N-octyl (meth) acrylamide, N
-Lauryl (meth) acrylamide, (meth) acryloyl morpholine and the like, among which N-butyl (meth) acrylamide, N-octyl (meth) acrylamide, N-lauryl (meth) acrylamide and the like are particularly preferable. These may be used singly or in combination of two or more kinds to account for 30% of all monomers in the acrylic polymer (c).
To 80% by weight, preferably 40 to 70% by weight.

Specific examples of the alkyl (meth) acrylate-based monomers include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, and butyl (meth) acrylate. .
These may be used alone or in combination of two or more kinds in an acrylic polymer (c) in an amount of 5 to 45% by weight, preferably 10 to 40% by weight of the total monomers.

Specific examples of the (meth) acrylamide-based and / or (meth) acrylate-based monomers having a tertiary amino group include (meth) acrylic acid-N,
N-dimethylaminoethyl, (meth) acrylic acid-N,
N-diethylaminoethyl, (meth) acrylic acid-N,
N-dimethylaminopropyl, N, N-dimethylaminopropyl (meth) acrylamide and the like can be mentioned. These may be used alone or in combination of two or more kinds thereof in an amount of 2 to 30% by weight of the total monomers in the acrylic polymer (c);
Preferably, 5 to 15% by weight is used.

Specific examples of the alkyl ester monomer substituted with a hydroxy group or a methoxy group (meth) acrylate include hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, and polyethylene glycol mono (meth) acrylate. , Polypropylene glycol mono (meth) acrylate, methoxy polyethylene glycol mono (meth) acrylate, methoxy polypropylene glycol mono (meth) acrylate, and the like. These are used singly or in combination of two or more, and are used in an amount of from 0 to 30% by weight, preferably from 5 to 15% by weight of the total monomers in the acrylic polymer (c).

In the present invention, the film-forming acrylic polymer (c) has an average molecular weight of 10,000 to 50,000.
It must be in the range of 00. Average molecular weight is 1
If it is less than 000, the setting property of the hair deteriorates,
On the other hand, if the average molecular weight exceeds 50,000, the viscosity becomes too high, so that good finish and use feeling cannot be obtained. In addition, the compounding amount is 2 to 20 in the total amount of the hair cosmetic.
% By weight, especially 5 to 10% by weight.

In the hair cosmetic of the present invention, glyceride, polyether-modified silicone, methylphenyl silicone, ester oil, hydrocarbons, etc. may be further added to the above-mentioned film-forming acrylic polymer for the purpose of improving the feeling of use. Various oil agents commonly used for hair cosmetics can be combined and blended.

Further, the hair cosmetic composition of the present invention may contain optional components commonly used in hair cosmetic compositions as long as the effects of the present invention are not impaired. As this optional component, mica titanium, gloss imparting agents such as bismuth oxychloride, polypyrrolidone carboxylate aluminum, aluminum chloride, astringents such as birch extract, hyaluronic acid, humectants such as ceramide-related substances, ultraviolet absorbers, Perfumes, pigments and the like can be mentioned.

The hair cosmetic of the present invention is prepared by dissolving the above-mentioned film-forming acrylic polymer, an oil agent and, if necessary, any optional components in a solvent commonly used for hair cosmetics.
It is prepared by dispersing, but if a solvent containing a relatively large amount of ethanol is used, a hair cosmetic which has a styling effect as well as a set holding power similar to a hair spray using a conventional propellant can be obtained. it can. As a solvent containing a relatively large amount of ethanol, water /
An ethanol mixed solvent of ethanol = 2/98 to 30/70, particularly water / ethanol = 8/92 to 15/85 is preferable.

The hair cosmetic of the present invention thus obtained is
It is suitable for a spray container that does not use a propellant. Even when the hair cosmetic of the present invention is sprayed using such a container, the average particle size of the obtained mist is as small as 2 to 70 μm and excellent. The finish and the feeling of use of the hair can be obtained.

Examples of the spray container that does not use a propellant that can be used in the hair cosmetic composition of the present invention include a pump container (for example, “Y-150”, manufactured by Yoshino Industrial Co., Ltd.) and a pressure accumulating continuous injection system container (a so-called air spray container). (For example, Air Spray International), an elastic inner bag type injection system container utilizing the compressive force of rubber (for example, "Excel System", manufactured by Excel), and the like. Among these, a pressure accumulating type air spray container, particularly an air spray / dry spray type container, can obtain an extremely small mist having a particle size of 30 to 40 μm, which is fast drying and non-sticky, and is not easily sprayed. Use feeling is obtained with a good finish close to a hair spray using an agent.

[0038]

The hair cosmetic composition of the present invention, when sprayed on hair using a spray container without a propellant, has a small average mist particle diameter of 2 to 70 μm, and has good set retention and styling effects. Etc., and is excellent in use feeling.

[0039]

EXAMPLES The present invention will be further described with reference to the following examples, which should not be construed as limiting the invention thereto. In this example, the average molecular weight was measured using GPC, and the viscosity was 30% for a 10% ethanol solution.
It measured using the Brookfield viscometer using a BL adapter at ° C.

Example 1 Using the acrylic polymer and the acidic vinyl ether polymer shown in Table 1, hair cosmetics having the compositions shown in Tables 2 and 3 were prepared.

[0041]

[Table 1]

[0042]

[0043]

[Table 1]

Evaluation of the set holding power of the hair cosmetics of the product 1 of the present invention and the comparative products 1 and 2 was carried out according to the following method.
Evaluation of the feel and measurement of the particle size of the mist generated when spraying were performed. Table 4 shows the determination results of the set holding power, and Table 5 shows the evaluation results of the feel and the results of the particle size measurement.

(1) Set holding power A hair bundle having a length of 15 cm and a weight of 2 g was wetted with water, wound around a glass rod having a diameter of 4 cm, and dried at 50 ° C. for 3 hours. After drying, the hair bundle was removed from the rod, each sample was sprayed from a distance of 15 cm, and dried at 20 ° C. and 65% RH for 30 minutes. Thereafter, the hair bundle was vibrated at 20 ° C. and 98% RH for 30 minutes, and the curl was observed. 100% length of hair bundle before vibration
The set holding ratio was determined according to the following equation, and the set holding force was determined.

[0046]

(Equation 1)

(2) Evaluation of feel Each sample was sprayed on an experimental human head model (wig).
Scoring by 20 panelists (+2: very good,
(+1: good, 0: normal, -1: slightly bad, -2: bad)
The evaluation was performed according to the following criteria. ◎: very good + 1.5 ≦ a ≦ + 2 ：: good + 0.5 ≦ a <+1.5 Δ: normal −0.5 ≦ a <+0.5 ×: somewhat poor −1.5 ≦ a <−0. 5 xx: bad -2≤a <-1.5

(3) Measurement of Particle Size Each sample was jetted from each container, and the particle size at a distance of 15 cm from the injection hole was measured using a laser diffraction type particle size distribution analyzer.

[0049]

[Table 2]

[0050]

[Table 3]

From the results shown in Tables 4 and 5, the hair cosmetic composition of the present invention can obtain a mist having a small particle diameter without using a propellant, and has good hair holding power and feeling. Things.

Example 2 The following components were mixed to prepare a hair cosmetic. (Composition) Acrylic polymer (c) (30% ethanol solution) 20.0 (% by weight) α-monoisostearyl glyceryl ether 0.2 Methylphenyl silicone (KF-56, Shin-Etsu Silicone Co., Ltd.) 0.1 Fragrance 0 .15 99.5% ethanol aqueous solution 69.55 water 10.0 total 100.0 When the obtained hair cosmetic was filled in a pump container, a mist having a particle diameter of 58 μm (15 cm from the injection hole) was obtained, and water was removed. As a result of adding 10% by weight, a hair cosmetic having a styling effect by delaying drying was obtained.

Continuation of the front page (56) References JP-A-4-306250 (JP, A) JP-A-4-306251 (JP, A) JP-A-2-180911 (JP, A) JP-A-56-149412 (JP) , A) (58) Field surveyed (Int. Cl. ⁷ , DB name) A61K 7/11

Claims (1)

(57) [Claims] 1. A (meth) acrylamide monomer
(Meth) acrylic acid alkyl ester-based monomer- (meth) acrylamide-based and / or (meth) acrylic ester-based monomer having a tertiary amino group- (meth) acrylic acid hydroxy- or methoxy-substituted alkyl ester-based monomer Average molecular weight of 10,0
A film-forming acrylic polymer having a thickness of from 00 to 50,000 is dissolved and dispersed in a solvent composed of water / ethanol in a ratio of 2/98 to 30/70, and filled in a spray container without using a propellant. Hair cosmetics for hair styling.