JPS63316714A - Hair cosmetic - Google Patents

Abstract

PURPOSE:To obtain a hair cosmetic, capable of simultaneously imparting excellent lubricity and humectant properties to the hair and having good persistence of such effects, by using a cationic surfactant and a vegetable oil containing a specific amount or more of unsaponified substances. CONSTITUTION:A hair cosmetic, obtained by blending (A) a cationic surfactant, especially one or more compounds expressed by formula I [1 or 2 of R1-R4 are 10-24C alkyl, 10-24C hydroxyalkyl or formula II (R is 10-24C alkyl or 10-24C hydroxyalkyl; n is an integer of 1-10) and the rest are 1-3C alkyl, formula III (m is an integer of 1-5; R5 is H or CH3), benzyl or cinnamyl; X is halogen or 1 or 2C alkylsylfuric acid group] and (B) a vegetable oil, especially fat and oil obtained from shea seeds containing >=6wt.% unsaponified substances as essential ingredients, having the above-mentioned effects and capable of imparting smoothness without stickiness and stiffness and moist feeling to the washed hair. The amounts of the ingredients (A) and (B) are respectively 0.1-10wt.% based on the total hair cosmetic.

Description

[Detailed description of the invention] The present invention has an excellent effect of imparting smoothness and moisturizing properties to hair, and gives the hair a smooth and moist feeling without stickiness or stiffness after washing. Moreover, the present invention relates to a hair cosmetic that has long-lasting effects.

The next one will try.

Hair cosmetics such as hair rinses and hair treatments improve hair problems after shampooing, add lubricity and moisturizing properties to hair after shampooing, and give a smooth texture and smooth combing/brushing. It is used for the purpose of making hair moist and easy to manage.

In order to achieve this objective, many hair cosmetics have been proposed that contain cationic surfactants such as quaternary ammonium salts as a main ingredient. However, hair cosmetics containing only a cationic surfactant have problems in adsorption to and release from the hair, and are insufficient in imparting smoothness and moisturizing properties.

Therefore, in order to enhance the effect of imparting lubricity and moisturizing properties, it has been proposed to combine various oils such as hydrocarbon oils, vegetable oils, ester oils, animal oils, and silicone oils with cationic surfactants.

However, oils that have traditionally been used as ingredients in hair cosmetics tend to have uneven effects on the hair due to their properties6.For example, among these oils, silicone oil has a very high smoothness imparting effect. However, it is inferior in moisturizing effect.

When hair cosmetics containing silicone oil are used, the hair becomes smooth but lacks moisture, leaving the hair with a dry and stiff feel. Furthermore, when hair cosmetics containing vegetable oils such as camellia oil are used, the hair walls are moisturized, but the hair feels sticky and heavy. In this case, by blending a large amount of oil into the hair cosmetic, it is possible to impart both smoothness and moisturizing properties to the hair, but after using the hair cosmetic,
As days pass, the hair becomes greasy and stiff.

Therefore, if a cationic surfactant and the above-mentioned oil are combined, it is easy to impart either smoothness or moisturizing properties to the hair, but it is also possible to impart both effects at the same time and maintain these effects. It has been extremely difficult to obtain hair cosmetics with good properties.

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a hair cosmetic that can simultaneously impart excellent smoothness and moisturizing properties to hair, and that also has excellent sustainability of these effects. do.

. As a result of intensive studies to achieve the above object, the present inventors have found that a cationic surfactant, particularly the following general formula (1), is added to the entire hair cosmetic composition [However, in the formula, R1 to R4 Any one or two of them is an alkyl group having 10 to 24 carbon atoms, a hydroxyalkyl group having 10 to 24 carbon atoms, or a general formula R (CH, CH, O (where R is 10 to 24 carbon atoms). an alkyl group or a hydroxyalkyl group having 10 to 24 carbon atoms, n is an integer of 1 to 10), and the rest are groups having 1 to 3 carbon atoms.
The alkyl group R5 is a group represented by H or CR2), a benzyl group, or a cinnamyl group, or a halogen atom or an alkyl sulfate group having 1 or 2 carbon atoms. 1 selected from quaternary ammonium salts and mono-N-long chain acyl basic amino acid lower alkyl ester salts represented by
Hair cosmetics containing 0.1 to 10% by weight of a cationic surfactant or two or more types of cationic surfactants and 0.1 to 10% by weight of vegetable oil containing 6% or more of unsaponifiable substances are effective. I found that.

That is, it is known to combine a cationic surfactant and vegetable oil in hair cosmetics, but all of the vegetable oils conventionally used as hair cosmetic ingredients have an unsaponifiable substance content of 0.1 to 1. It is low at around 1.5% by weight, and even if such vegetable oil is blended, it will not be possible to simultaneously impart both smoothness and moisturizing properties to the hair and maintain these effects as described above. Although it was difficult, if a vegetable oil containing 6% by weight or more of unsaponifiable substances, which has an extremely higher content of unsaponifiable substances than the vegetable oil conventionally used as a hair cosmetic ingredient, was used in combination with a cationic surfactant within the above range. It has the effect of simultaneously imparting excellent smoothness and moisturizing properties to the hair, giving the hair both a smooth and moist feeling without stickiness or stiffness after washing, giving a light and soft feel to the finish. We have discovered that an excellent hair cosmetic can be obtained that has long-lasting effects and does not make hair sticky or stiff even 2 to 3 days after using the hair cosmetic. This is what we have come to do.

Therefore, the present invention contains 0.1 to 10% by weight of a cationic surfactant and 0.1 to 10% by weight of a vegetable oil containing at least 6% by weight of unsaponifiable substances. To provide a hair cosmetic characterized by:

The present invention will be explained in more detail below.

The first essential ingredient of the hair cosmetic of the present invention is a cationic surfactant. Here, there is no restriction on the type of cationic surfactant, and any surfactant that is commonly used as a base material for hair cosmetics can be used. Salts and mono-N-long chain acyl basic amino acid lower alkyl ester salts are particularly effective, and it is preferred to use one or more of these.

In this case, as the quaternary ammonium salt of formula (1),
Specifically, stearyltrimethylammonium chloride, cetostearyltrimethylammonium chloride, and distearyldimethylammonium bromide.

Examples include behenyltrimethylammonium bromide, stearyldimethylbenzylammonium chloride, cetyltrimethylammonium iodide, and methyl sulfate of stearyltrimethylammonium, and one or more of these can be preferably used.

In addition, although there are no particular limitations on the mono N-long chain acyl basic amino acid lower alkyl ester salt, for example, mono N-long chain acyl groups include saturated or unsaturated natural fatty acid residues having 8 to 22 carbon atoms. Examples include single fatty acid residues such as lauroyl group, myristoyl group, valmitoyl group, and stearoyl group, and natural mixed fatty acid residues such as coconut oil fatty acid residue and beef tallow fatty acid residue. Basic amino acids include ornithine, Examples include natural basic amino acids such as lysine and arginine, and synthetic basic amino acids such as α,γ-diaminobutyric acid, which may be either optical isomers or racemates, and may be used as lower alkyl ester salts. For example, methyl ester, ethyl ester, propyl ester.

Inorganic acid salts such as hydrochloride and sulfate of lower alkyl esters such as butyl ester, hexyl ester, heptyl ester, and octyl ester, p-toluenesulfonate, fatty acid salt, acidic amino acid salt, D- or DL-pyrrolidone carboxylic acid Examples include organic acid salts such as salts, among which acidic amino acid salts of lower alkyl esters, hydrochlorides,
D- or DL-pyrrolidone carboxylate is preferably used.

Specific examples of these mono-N-long chain acyl basic amino acid lower alkyl esters include N-lauroyl arginine ethyl ester hydrochloride, N-myristoylidine methyl ester-〇L-pyrrolidone carboxylate, etc. One type or two or more types may be used.

These mono-N-long chain acyl basic amino acid lower alkyl ester salts can be easily produced using the above basic amino acids as raw materials by the method described in Japanese Patent Publication No. 42-11926 or Japanese Patent Publication No. 43-9529. Can be done.

In the hair cosmetic of the present invention, the amount of the above-mentioned cationic surfactant is 0.1 to 10% by weight, particularly preferably 0.2 to 5% by weight, based on the total amount of the hair cosmetic. If it is less than .1% by weight, the effect will not be exhibited;
If the amount exceeds % by weight, the hair becomes sticky.

Next, the second essential component of the present invention is a vegetable oil. In the present invention, a vegetable oil having an unsaponifiable substance content of 6% by weight or more, particularly 8% by weight or more is used as the vegetable oil. However, if a vegetable oil having an unsaponifiable substance content of less than 6% by weight is used, it is impossible to obtain the hair cosmetic as the object of the present invention.

Such vegetable oils have an unsaponifiable content of 6% by weight.
Although there are no particular restrictions on the above, oils and fats obtained from shea (another name: Karite) fruit (hereinafter referred to as shea butter) can be particularly preferably used.

In the hair cosmetic of the present invention, vegetable oil having an unsaponifiable content of 6% by weight or more is added to 0.1 to 1% of the total amount of the hair cosmetic.
0% by weight, preferably 0.3 to 5% by weight. If the amount is less than 0.1% by weight, both the effects of imparting smoothness and moisturizing properties cannot be satisfied, and if it is more than 10% by weight, the hair will not have a light feel without stickiness when finished.

Note that, if necessary, other oils may be blended in addition to the above-mentioned vegetable oil to the extent that they do not interfere with the effects of the vegetable oil, such as silicone derivatives.

Hydrocarbons, ester oils, higher fatty acids, higher alcohols,
One or more types of oil components such as lanolin derivatives can be blended as appropriate.

The hair cosmetic of the present invention can be prepared as a hair rinse, hair conditioner, hair treatment, hair bag, etc.
In addition to the above-mentioned ingredients, the hair cosmetic of the present invention may contain any known ingredients such as emulsion stabilizers, cold stabilizers, colorants, fragrances, thickeners, and bactericides, depending on the type of cosmetic. Components can be mixed as appropriate.

As mentioned above, the hair cosmetic of the present invention has the effect of imparting excellent smoothness and moisturizing properties to the hair, and provides both smoothness and moist feeling without stickiness or stiffness on the hair. can be applied to give the hair a light and soft finish after washing.

The hair cosmetic of the present invention has a high durability of the above-mentioned effects and does not leave the hair sticky or sticky even after several days of use, so it feels very good when used.

EXAMPLES Hereinafter, the present invention will be specifically explained with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples.

In addition, in the following examples, all percentages indicate weight percentage.

[Examples 1 and 2, Comparative Examples 1 to 8] Examples 1 and 2 and Comparative Examples 1 to 8 having the compositions shown in Table 1
Hair rinse composition No. 8 was prepared by the following method.

A cationic surfactant, oil, cetostearyl alcohol, polyoxyethylene (POE) (30 mol), and hydrogenated castor oil triisostearate were mixed and dissolved by heating to prepare an oil phase.

On the other hand, ion-exchanged water was heated to 30 to 60°C to form an aqueous phase.

Next, using a homomixer, the oil phase was added to the water phase and emulsified. After the emulsification was completed, it was cooled to obtain a hair rinse composition.

A panel of five people (women in their 20s to 30s with semi-long hair with relatively little damage) performed a sensory evaluation of the feel of the resulting hair rinse composition according to the following method.

The results are shown in Table 1.

A hair rinse composition with the following composition was used as a standard product, and a half-head pair comparison method was used to determine the smoothness, moistness, and stickiness of the hair after drying when using the hair rinse composition. 3
Five expert judges evaluated the lack of stickiness and stiffness of the hair after a day based on the following criteria.

Standard product composition Cetyltrimethylammonium chloride 1.0% cetanol 3.0POE (20)
Glyceryl triisostearate 2.0 Propylene glycol 3.0 Ion exchange water
Remaining amount
100.0% evaluation standard Evaluation points 5 points: 4 points better than the standard product 〃 3 points slightly better than 〃 2 points equivalent to 〃 1 point slightly inferior to 〃 5 points worse than 〃 Weighted average value of evaluation scores of professional judges: 0: 4.0
Above: 0: 3.3-3.9 Δ: 2.7-3.2 X: 2. O ~ 2.6 XX: 1.9 or less As is clear from the results in Table 1, compositions lacking either of cationic surfactants and vegetable oils containing 6% or more of unsaponifiables (comparative examples) 1°2.5) is oral 3
Not only after drying but also after drying, satisfactory effects cannot be obtained in terms of smoothness, moisturizing, non-stickiness, and non-stiffness. Compositions containing vegetable oil (Comparative Examples 3 and 6) and compositions containing cationic surfactant and silicone oil with high lubricating effect (Comparative Example 4)
In this case, both the smoothness and the moist feel of the hair were inferior. Furthermore, even if a cationic surfactant and a vegetable oil containing 6% or more of unsaponifiables are combined,
Compositions containing the amount of vegetable oil outside the range of the present invention (Comparative Examples 7 and 8) cannot achieve a sufficiently satisfactory effect on both the smoothness and moisturizing of the hair, and in particular, the hair becomes sticky after 3 days. , stiffness was likely to occur.

In contrast, the products of the present invention (Examples 1 and 2) had sufficiently satisfactory effects in all evaluations of hair smoothness, moisturizing, non-stickiness, and non-stiffness.
It was found that even after several days, there was no stickiness or stiffness, and the product had an excellent feeling of use.

[Example 3] A hair treatment having the composition shown in Table 2 was prepared and subjected to sensory evaluation in the same manner as above.

The results are shown in Table 2.

Table 2 The results in Table 2 also show that the hair treatment according to the present invention has an excellent effect of imparting both smoothness and moisturization to the hair, and also has good properties in terms of stickiness and stiffness after 3 days of oral administration, and has an excellent feeling of use. It was recognized that the company had the following.

Claims (1)

[Claims] 1. Add 0.0% cationic surfactant to the entire hair cosmetic.
A hair cosmetic comprising 1 to 10% by weight of a vegetable oil and 0.1 to 10% by weight of a vegetable oil containing 6% or more of unsaponifiable substances. 2. The cationic surfactant has the following general formula (1)▲There are mathematical formulas, chemical formulas, tables, etc.▼・・・・・・(1) [However, in the formula, one or two of R_1 to R_4 are Alkyl group having 10 to 24 carbon atoms, 10 to 24 carbon atoms
hydroxyalkyl group, or general formula R(CH_2CH
_2O)-_n (where R is an alkyl group having 10 to 24 carbon atoms or a hydroxyalkyl group having 10 to 24 carbon atoms, n
is an integer from 1 to 10. ), and the rest are alkyl groups having 1 to 3 carbon atoms. General formula ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (where m is an integer from 1 to 5, R_5 is H or CH_3), benzyl group,
or a cinnamyl group, and X is a halogen atom or an alkyl sulfate group having 1 or 2 carbon atoms. The hair cosmetic according to claim 1, which is one or more selected from quaternary ammonium salts and mono-N-long-chain acyl basic amino acid lower alkyl ester salts represented by the following formulas. 3. The hair cosmetic according to claim 1 or 2, wherein the vegetable oil is an oil obtained from shea seeds.