JPH0692827A - Cosmetic for hair - Google Patents

Abstract

PURPOSE:To provide the hair cosmetic expressing excellent hairdressing characteristics and simultaneously exhibiting a good set-holding force even in a high humidity state by adding carboxymethylcellulose or its derivative to the prescription of the hair cosmetic using an amphoteric polymeric compound. CONSTITUTION:The hair cosmetic good in usability, permitting to dress hair without giving a stiff touch to the dressed hair, and exhibiting an excellent set-holding force to the hair even in a high humidity state contains an amphoteric polymeric compound and a cellulose derivative as essential components. The amphoteric polymeric compound is preferably N-methacryloylethyl N,N- dimethylammonium-alpha-N-methylcarboxybetaine.methacrylate ester copolymer of the formula (R is 1-10C alkyl; m:n are 10:90 to 50:50, number-average mol.wt. is 20000-200000), and the cellulose derivative is preferably carboxymethylcellulose, its salt or hydroxypropylmethylcellulose.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic for hair,
The purpose is to provide a cosmetic for hair which has good usability, and can prepare hair without giving a feeling of stiffness to the hair after hair styling, and exhibit excellent set holding power for hair even in a high humidity condition. is there.

[0002]

2. Description of the Related Art Heretofore, as a cosmetic for hair used to condition hair, oily cosmetics such as hair liquids, hair tics and pomades containing oils and fats as a main component have been used. However, such oily cosmetics have problems such as stickiness of the scalp and the like during use, and poor removal during hair washing.In recent years, the use of set lotions and hair sprays containing synthetic polymer compounds as a main component has instead taken place. Is changing. Hair cosmetics containing synthetic polymer as the main component have less sticky feeling on the scalp and the like when used, compared to those using conventional oils, waxes, etc. A suitable usability is exhibited. As such a synthetic polymer compound, a nonionic polymer compound such as polyvinylpyrrolidone has been mainly used in a hard type hair styling material because of its high setting power.

The above-mentioned nonionic polymer compound forms a hard film and has a strong setting force, but has a problem that the flaking phenomenon easily occurs. In addition, since this compound itself has hygroscopicity, the coating becomes very soft when hot and humid, weakening the setting force, and further, a sticky feeling appears, causing a blocking phenomenon, hairs sticking to each other and cleaning and brushing. There was a problem that could make it impossible.

On the other hand, anionic polymer compounds such as vinyl methyl ether / monoethyl maleate copolymer are also used in cosmetics for hair. This anionic polymer compound is less likely to be affected by humidity and can exhibit better performance than nonionic polymer compounds at high temperature and humidity, but has a problem that the affinity for hair is low and flaking phenomenon easily occurs. there were. Further, since it is an anionic type, the addition of the cationic substance is restricted, and there is a risk that the use of the rinse agent at the time of washing the hair may cause a solidification phenomenon on the hair.

Furthermore, polyquaternium-11 (Po
Cationic polymer compounds such as lyquaternium-11) are also used in cosmetics for hair. This cationic polymer compound has a higher affinity for hair than the anion polymer compound, but like the nonionic polymer compound, it has a problem that it is easily affected by humidity. In addition, because it is a cationic system, there are safety issues such as toxicity and skin irritation,
There is a problem that the hair is solidified by shampooing when washing hair.

In view of such a situation, Japanese Examined Patent Publication Sho 55-17009
An amphoteric polymer compound as shown in Japanese Patent Publication has been developed. In recent years, amphoteric polymer compounds such as N-methacryloylethyl N, N-dimethylammonium-α-N-methylcarboxybetaine / methacrylic acid ester, which have a high affinity for hair and form a good flexible film, have been developed. It has come to be used in cosmetics for hair. Since the cosmetic for hair containing the amphoteric polymer compound can contain a large amount of water, it has the advantages that it is easy to prepare the hair, the hair after the hair preparation is not stiff, and the flaking phenomenon is unlikely to occur.

[0007]

However, there has been a problem that even a cosmetic for hair containing such an amphoteric polymer compound cannot exhibit a high set-retaining property in a high humidity state. Therefore, in the industry, the above-mentioned amphoteric polymer compound has hair styling properties, that is, it is possible to contain a large amount of water and is easy to use, and at the same time, it is possible to exhibit an excellent function of not causing a tingling sensation to the hair after hair styling. It has been desired to create a cosmetic for hair that can exhibit excellent set-holding power on the hair after hair styling even in a high humidity condition.

[0008]

In the present invention, the above conventional problems are solved by providing a cosmetic for hair, which comprises an amphoteric polymer compound and a cellulose derivative as essential components. .

[0009]

[Function] By incorporating carboxymethylcellulose and / or a salt thereof or a cellulose derivative such as hydroxypropylmethylcellulose in the formulation of a cosmetic for hair using an amphoteric polymer, excellent hair styling properties possessed by the amphoteric polymer are obtained. It is possible to exhibit good set-holding power for the hair after styling at the same time even in a high humidity state while expressing the above.

[0010]

The structure of the cosmetic for hair according to the present invention will be described in detail below. The cosmetic for hair of the present invention contains an amphoteric polymer compound and a cellulose derivative as essential components. As the amphoteric polymer compound, N-methacryloylethyl N, N-dimethylammonium-α-N-methylcarboxybetaine / methacrylic acid ester copolymer represented by the general formula 2 (Chemical Formula 2) is suitable for the present invention. This is illustrated as an example.

[Chemical 2] (However, in general formula 2 (Formula 2), R represents an alkyl group having 1 to 10 carbon atoms, and the relationship of n: m is 10:90 to 50:
50 and the number average molecular weight is 20,000 to 200,000. )

Such N-methacryloylethyl N,
The N-dimethylammonium-α-N-methylcarboxybetaine / methacrylic acid ester copolymer is water-soluble, so workability during preparation is good, and the coating film formed is flexible, so that the hair does not feel stiff and is good. It has excellent properties such as a good setting condition, and functions well as a setting agent for hair cosmetics. This N-methacryloylethyl N, N-dimethylammonium-α-N
-Methylcarboxybetaine / methacrylic acid ester copolymer is added in an amount of 0.5 to 10.0% by weight based on the total amount of the cosmetic for hair. The reason for this is that if the blending amount is less than 0.5% by weight, sufficient setting force for hair cannot be obtained, while if the blending amount exceeds 10.0% by weight, stiffening and flaking on the hair after styling are performed. Appears remarkably and is not preferable in any case.

Further, in the present invention, in addition to the amphoteric polymer compound described above, a cellulose derivative is also contained as one of the essential components. By blending the cellulose derivative in this way, while making use of the excellent hair styling properties of the amphoteric polymer compound, at the same time, the set holding property of the hair in a high humidity condition, which is a drawback of the amphoteric polymer, is extremely improved. This is based on the experimental knowledge by the present inventors that it is possible.

As the cellulose derivative, carboxymethyl cellulose and / or its salt, or hydroxypropyl methyl cellulose is exemplified as a preferred embodiment. Examples of carboxymethyl cellulose and / or its salt include CMC Daicel (manufactured by Daicel Chemical Industries, Ltd.)
Those commercially available under the trade names such as are preferably used, but are not particularly limited. As the hydroxypropylmethyl cellulose, those commercially available under the trade name of Metroze SH (manufactured by Shin-Etsu Chemical Co., Ltd.) are preferably used, but not particularly limited. Such a cellulose derivative is 0.3 to 1.0 with respect to the total amount of the cosmetic for hair.
It is blended by weight%. The reason for this is that the blending amount is 0.3% by weight.
If it is less than 1.0%, the set retaining property in a high humidity state becomes low. On the other hand, even if it is compounded in an amount exceeding 1.0% by weight, no improvement in the set retaining property depending on the compounding amount is observed, and in any case. This is because it is not preferable.

Further, in this hair cosmetic composition, in addition to the above essential components, a cationic surfactant, amphoteric surfactant, nonionic surfactant, oily substance, as long as the stability of the system is not impaired. A polyhydric alcohol, a gum, a water-soluble polymer compound and its derivative, an antiseptic, a chelating agent, an antioxidant, an ultraviolet absorber, a dye, a fragrance and the like can be appropriately added.

[0015]

EXAMPLES The effects of the cosmetic for hair according to the present invention will be described in more detail below with reference to examples. The present invention is not limited to this embodiment.

Examples 1 to 4 and Comparative Example 1 N-methacryloylethyl N, N-dimethylammonium-α-N-methylcarboxybetaine / butyl methacrylate copolymer (manufactured by Mitsubishi Yuka Co., Ltd.) as a setting agent : Sodium carboxymethyl cellulose, in order to find a set holding property in a high humidity condition in a cosmetic for hair using Yukaformer AM75-301 (30% ethanol solution) (trade name)),
Hydroxypropylmethyl cellulose, hydroxypropyl cellulose, hydroxyethyl cellulose and 4 kinds of additive materials were respectively mixed, and the hair cosmetics of Examples 1 to 4 were prepared according to the formulations shown in Table 1. In addition, as Comparative Example 1, the same as the above Example was prepared except that the additive material was not blended.

[Table 1]

The hair cosmetics obtained in Examples 1 to 4 and Comparative Example 1 were each subjected to the set holding power test shown in the following test examples. The results are shown in Table 2.

[Table 2]

(Examples 5 to 10) In the present invention, sodium carboxymethyl cellulose, which was found to have excellent set-retaining property in a high humidity condition, was used, and its compounding amount was changed as shown in Table 3 to Example 5 to 10. 10 hair cosmetics were prepared.

[Table 3]

The hair cosmetics obtained in Examples 5 to 10 were each subjected to the set holding power test shown in the following test examples. The results are shown in Table 4.

[Table 4]

[0020]

[Test Example] The set holding power for hair was tested using the cosmetics for hair obtained in the above Examples.

Set holding power A hair bundle having a length of 30 cm and a weight of about 2 g was used in the above-mentioned Examples and Comparative Examples.
Use the obtained hair cosmetics in an amount of about 0.4 times the weight of the hair bundle.
Applied evenly. After combing, put it in a glass tube with a diameter of 1 cm.
Wrap, leave at 70 ° C for 2 hours to dry, then desicque
I let it cool in the water. Then remove the hair bundle from the glass tube
Apparent length of hair bundle (L₀) Was measured. Then the temperature 35
Hang the hair bundle in a constant temperature and humidity chamber at ℃ and 90% humidity, and after 2 hours
After taking out, the apparent length (L) of the hair bundle was measured again.
The set holding power of each cosmetic for hair was calculated by the following formula. * Note that the closer this value is to 100, the stronger the set holding power.
And indicates.

As is clear from Table 2, hair cosmetics containing sodium carboxymethyl cellulose and hydroxypropyl methyl cellulose (Examples 1 and 2)
In, it is understood that the hair has a set holding power superior to that of the cosmetics for hair containing hydroxypropyl cellulose and hydroxyethyl cellulose (Examples 3 and 4). It is also found that when compared with the cosmetic for hair (comparative example 1) in which the cellulose-based additive is not blended, it exhibits extremely excellent set holding power. As is clear from Table 4, when the content of sodium carboxymethyl cellulose is less than 0.3% by weight (Examples 8 and 9), the content is 0.3% by weight.
It can be seen that the set holding power is weaker than that of the above hair cosmetics (Examples 5 to 7). Further, the amount of sodium carboxymethyl cellulose blended was 1.5% by weight (Example 10).
It can be seen that there is no difference in the set holding force from the compound of 1.0% by weight (Example 7).

[0023]

As described above in detail, the present invention is a cosmetic for hair, which is characterized by containing an amphoteric polymer compound and a cellulose derivative as essential components. Thus, even in high humidity,
It has an excellent effect that an extremely high set-holding power can be expressed on the hair after hair styling.

Continuation of the front page (72) Inventor Noriyuki Fujiwara 5-15, 12kencho, Chuo-ku, Osaka City Mandom Central Research Institute, Inc.

Claims (3)

[Claims] 1. A cosmetic for hair, which comprises an amphoteric polymer compound and a cellulose derivative as essential components. 2. The amphoteric polymer compound is an N-methacryloylethyl N, N-dimethylammonium-α-N-methylcarboxybetaine / methacrylic acid ester copolymer represented by the general formula 1 (Formula 1). The hair cosmetic composition according to claim 1. [Chemical 1] (However, in general formula 1 (Formula 1), R represents an alkyl group having 1 to 10 carbon atoms, n: m is 10:90 to 50:50, and number average molecular weight is 20000 to 200,000. .) 3. The cellulose derivative is carboxymethyl cellulose and / or a salt thereof, or hydroxypropyl methyl cellulose.
The hair cosmetic composition according to any one of 1 to 3.