JP2007332047A - Cosmetic for external use - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cosmetic which is used for external uses, little irritates skins and can impart a sufficient sense of refreshment over a long time. <P>SOLUTION: This cosmetic used for external uses (excluding hair shampoos and hair rinses) is characterized by comprising a cold-sensing agent composition comprising (a) menthol, (b) camphor and (c) a fatty acid isopropyl ester, and being used in an acidic condition having a pH value of 3.0 to 6.8. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cosmetic for external use which has little irritation and has a refreshing refreshing feeling, such as lotion, hair tonic, body soap and bath preparation.

A large number of cosmetics containing a cool sensation substance such as menthol that gives a refreshing and refreshing feeling during and after use are commercially available. In order to improve the sustainability of such a refreshing feeling, the device which uses a menthol and a skin penetration agent together is proposed (refer patent document 1).
JP 2004-269368 A

However, in the prior art, the sustainability of the refreshing feeling is not sufficient yet, and there is a demand for a cosmetic that maintains the refreshing feeling for a longer time. On the other hand, a product with less irritation is required in consideration of the influence on the body.
An object of the present invention is to provide a cosmetic for external use such as a lotion, a body soap, a bath preparation, etc. that maintains a refreshing feeling for a long time after use and has no irritation.

  As a result of diligent research to solve the problems in the prior art, the present inventors have used a combination of menthol and camphor as a cooling sensation substance, and further uses a cosmetic containing fatty acid isopropyl in a certain range of acidic range. In this case, it was found that the refreshing feeling lasted for a long time and there was no irritation, and the present invention was completed.

  That is, the present invention includes a cooling sensation agent composition comprising (a) menthol, (b) camphor and (c) fatty acid isopropyl, and is used under acidic conditions having a pH value of 3.0 to 6.8. Cosmetics for external use (excluding hair shampoos and hair rinses).

  The present invention also includes a cooling sensation agent composition comprising (a) menthol, (b) camphor, and (c) fatty acid isopropyl, and the pH value is adjusted to 3.0 to 6.0. Is a water-soluble external cosmetic (excluding hair shampoo and hair rinse).

  In the above external cosmetic or water-soluble external cosmetic, the pH value is adjusted to 3.0 to 6.0 by adding an acid, and the acid is derived from citric acid, malic acid, succinic acid and phosphoric acid. It is characterized by being one or more selected acids.

Moreover, in the said external cosmetics or water-soluble external cosmetics, 0.1-20 mass parts of components (b) and 10 of components (c) are 10 parts of a cooling sensation agent composition with respect to 100 mass parts of component (a). -200 parts by mass of the composition, and component (c) of the cooling sensation agent composition is one or two fatty acid isopropyls selected from isopropyl palmitate and isopropyl myristate, To do.
Furthermore, the cooling sensation agent composition is blended so that the content of the component (a) in the external cosmetic or the water-soluble external cosmetic is 0.6 to 1% by mass.

The present invention also includes a cooling sensation agent composition comprising (a) menthol, (b) camphor and (c) fatty acid isopropyl, and is used in bath water having a pH value of 4.5 to 6.8. It is the bath agent characterized by this.
And it is an agent for baths which an acid is mix | blended so that pH value of bath water may be adjusted to 4.5-5.5.

  In addition, the composition contains a cooling sensation agent composition comprising (a) menthol, (b) camphor and (c) fatty acid isopropyl, and when 0.5 g of this drug is dissolved in 2000 mL of water, the pH value is 4. The bath agent is characterized in that an acid is blended so as to be 5 to 5.5.

  According to the present invention, a water-soluble external cosmetic (for example, skin lotion, body soap, hair tonic, etc.) and a bath preparation are included. External cosmetics can be provided.

The present invention will be described in detail below.
(1) Cool Sensitive Composition A menthol and camphor of component (b) are used in combination as component (a) which is a cooling sensation material constituting the cooling sensate composition.

  Menthol, Mentone, Pregole, Isopulegol, Cineol, Peppermint oil, Peppermint oil, Sparemint oil, Eucalyptus oil, etc. have a cooling effect, although they have different effects due to their chemical structures. In the present invention, menthol excellent in cooling effect and sustainability of cooling feeling is used.

  The compounding quantity of the camphor of a component (b) is 0.1-20 mass parts with respect to 100 mass parts of components (a), such as menthol, More preferably, it is 2-10 mass parts.

Component (c) is a fatty acid isopropyl having 12 to 20 carbon atoms, and specific examples include isopropyl palmitate and isopropyl myristate. These can be used alone or in combination to improve the penetration of a cooling sensation substance such as menthol into the skin and to provide a refreshing sensation that is efficient and less irritating without the use of large amounts of menthol. Used. The compounding amount of the component (c) is 10 to 200 parts by mass, more preferably 50 to 170 parts by mass with respect to 100 parts by mass of the component (a) such as menthol.
Further, in the cosmetic, the cooling sensation agent composition is preferably blended so that the content of the menthol of component (a) is 0.6 to 1% by mass.

(2) External cosmetics (a) Water-soluble external cosmetics Examples of the water-soluble external cosmetics include liquid cosmetics such as skin toners, body soaps, and hair tonics such as hair tonics.
Toner lotion is formulated with purified water and other moisturizers. Body soap is formulated with purified water and other active ingredients, and hair tonics such as hair tonic are purified water. Other additive components are blended mainly with ethanol, refined oil and moisturizing components.

  Examples of the additive component of the cosmetic include powder components, liquid fats and oils, solid fats and oils, waxes, hydrocarbons, fatty acids, alcohols, esters, silicone, anionic surfactants, cationic surfactants, and amphoteric surfactants. , Nonionic surfactant, moisturizer, water-soluble polymer, thickener, film agent, UV absorber, sequestering agent, sugar, amino acid, organic acid salt, inorganic salt, organic amine, cationized polymer, high Molecular emulsions, isotonic agents, skin nutrients, vitamins, preservatives, antioxidants, antioxidant auxiliaries, fragrances, water and the like can be appropriately blended according to conventional methods as necessary.

(B) Bathing agent Generally, bathing agents for solid cosmetics are roughly classified into inorganic salts and carbon dioxide, but the former is a moisturizing agent and pigment mainly composed of inorganic salts such as sodium bicarbonate and sodium sulfate. In the latter case, a carbonate such as sodium carbonate or sodium hydrogen carbonate and an organic acid are used in combination, and a moisturizer, a pigment, and a fragrance are blended.

(3) Use under acidic conditions In order to enhance the refreshing feeling sustainability, the cosmetic for external use of the present invention is used under acidic conditions having a pH value of 3.0 to 6.8. That is, when the cosmetic itself or the aqueous solution is in contact with the skin on the body surface, the penetration of the cooling sensation substance such as menthol into the skin can be improved if the pH value is in the above acidic range.
Therefore, for water-soluble external cosmetics that are applied to the skin as they are, for example, hair conditioners such as lotions, body soaps, and hair tonics, the pH value of such products is adjusted to 3.0 to 6.0. The pH value is particularly preferably 4.5 to 5.5.

In order to adjust the product to the above acidic range, it is preferable to add an acid to the product.
Examples of the acid include citric acid, malic acid, succinic acid, phosphoric acid and the like, and these may be used alone or in combination.
The blending amount of the acid is such that the pH value after the production of cosmetics such as skin lotions, body soaps, hair tonics and the like blended with the cooling sensate composition is in the above acidic range. The blending amount is preferably 1 to 10 parts by mass with respect to 100 parts by mass of the component (a) such as menthol.

  Here, the pH value of hair conditioners such as lotions, body soaps, and hair tonics that are water-soluble cosmetics is determined according to the pH measurement method listed in the Japanese Pharmacopoeia. In actual measurement, a predetermined amount of cosmetic material is put in a glass beaker, and the glass electrode is immersed in the measurement to measure. The measurement is performed while standing until the numerical value is stabilized or while stirring the cosmetic base material as necessary (so as not to apply an external shock to the glass electrode).

  On the other hand, in the case of a bath preparation that is solid (powder, granule, tablet), put into a bathtub at the time of use, and dissolved in water, the bath water in which it is dissolved comes into contact with the skin. If the pH value of water is preferably 4.5 to 6.8, particularly preferably 4.5 to 5.5, the permeability of a cooling sensation substance such as menthol to the skin can be greatly improved.

  Therefore, it is preferable that the acid is mix | blended with the bath agent so that the pH value of bath water may be adjusted to 4.5-5.5. Specifically, the blending amount is appropriately determined in consideration of the acidity and basicity of each component constituting the bath agent, the amount of bath agent used according to the size of the bath, and the acidity of the acid.

Examples of the acid blended to adjust the bath water to the acidic range include the citric acid, malic acid, succinic acid, phosphoric acid, and the like, and these are used singly or in combination.
The specific amount of the acid is determined so that the pH value is 4.5 to 5.5 when 0.5 g of the bath preparation is dissolved in 2000 mL of warm water in consideration of the normal use mode. When the organic acid is citric acid, it is appropriately adjusted according to the blending amount of the inorganic salt in the bath agent, but the amount is about 5 to 50 parts by mass.

EXAMPLES Next, although an Example is shown and this invention is demonstrated further more concretely, this invention is not limited to these Examples.
<Preparation of cooling agent composition (A)>
With respect to 100 parts by mass of menthol, 4.0 parts by mass of camphor and 170 parts by mass of isopropyl palmitate were blended to obtain a cooling sensation agent composition (A).

<Example 1>
A lotion having the formulation shown in Table 1 was prepared using the cooling sensation agent composition (A).

  To adjust the pH value, use “HORIBA pH METER F-22” manufactured by HORIBA, Ltd., and add the raw materials in the formulation components except for citric acid and purified water corresponding to a final total amount of 1000 parts by mass to a 2000 mL glass beaker. Then, citric acid and purified water were added so that the pH was 5.5 when the final total amount of the skin lotion was 1000 parts by mass.

<Example 2>
A lotion (1) was prepared in the same manner as in Example 1 except that the pH was not adjusted with citric acid. Its pH was 6.5.

<Example 3>
A hair tonic having a formulation shown in Table 2 was prepared using the cooling sensation agent composition (A).

  The pH value was adjusted to 5.5 under the same conditions as in Example 1.

<Example 4>
A body soap having the formulation shown in Table 3 was prepared using the cooling sensation agent composition (A).

  The pH value was adjusted to 5.5 under the same conditions as in Example 1.

<Example 5>
Using the cooling sensation agent composition (A), a bath preparation (a) having a formulation shown in Table 4 was prepared.

  Citric acid and purified water are added so that pH when 0.5 g of the above bath agent (a) is dissolved in 2000 mL of warm water at 40 ° C. is prepared to prepare 100 parts by mass of the bath agent (a). did.

<Example 6>
A bath agent (a-1) was prepared in the same manner as in Example 5 except that the pH was not adjusted with citric acid. When 0.5 g of this bath agent (a-1) was dissolved in 2000 mL of warm water at 40 ° C., the pH was 6.8.

<Example 7>
Using the cooling agent composition (A), a bath preparation (b) having a formulation shown in Table 5 was prepared.

  Citric acid, sodium hydrogen carbonate and sodium sulfate are added so that the pH when 0.5 g of the above bath agent (a) is dissolved in 2000 mL of warm water of 40 ° C. is added to total 100 parts by weight of bath agent ( b) was prepared.

<Comparative Example 1>
A lotion (2) was prepared in the same manner as in Example 1 except that sodium citrate was newly added to adjust the pH to 7.2.

<Comparative example 2>
A lotion (3) was prepared in the same manner as in Example 1 except that the amount of the cooling sensation agent composition (A) was adjusted to 1/2 that of Example 1.

<Comparative Example 3>
Instead of the cooling sensation agent composition (A), components (a) and (b) were added in the same manner as in Example 1 except that 1.0 part by weight and 1.7 parts by weight were added to 100 parts by weight of the lotion. Lotion (4) was prepared. The total was adjusted with purified water.

<Comparative example 4>
Instead of the cooling sensation agent composition (A), components (a) and (c) were added in the same manner as in Example 1 except that 1.0 part by weight and 0.4 part by weight were added to 100 parts by weight of the lotion. Lotion (5) was prepared. The total was adjusted with purified water.

<Comparative Example 5>
Toner lotion (6) was prepared in the same manner as in Example 1 except that 1.0 part by mass of component (a) was added to 100 parts by mass of lotion instead of cooling sensation agent composition (A). The total was adjusted with purified water.

<Comparative Example 6>
A hair tonic (1) was prepared in the same manner as in Example 3 except that sodium citrate was newly added to adjust the pH to 7.2.

<Comparative Example 7>
Body soap (1) was prepared in the same manner as in Example 4 except that sodium citrate was newly added to adjust the pH to 7.2.

<Comparative Example 8>
A bath agent (a-2) was prepared in the same manner as in Example 5, except that sodium citrate was newly added and 0.5 g of the bath agent was dissolved in 2000 mL of warm water at 40 ° C. to adjust the pH to 7.2. Was prepared.

<Comparative Example 9>
Except for adjusting pH to 7.2 when 0.5 g of a bath preparation was dissolved in 2000 mL of warm water at 40 ° C. with citric acid, sodium bicarbonate and sodium sulfate, the bath preparation (b- 1) was prepared.

About the intensity | strength and sustainability of the cooling sensation of the external cosmetics of the said Examples 1-7 and Comparative Examples 1-9, sensory evaluation was performed with the following method and the effect of the refreshing sensation persistence was examined.
<Cool feeling test method>
Sensory evaluation was performed using a general panel (n = 9) according to the following procedure.
Evaluation of lotion and hair tonic (1) 200 μL is dropped onto the back of the hand with a micropipette and spread over the back of the hand.
(2) Immediately after 5 minutes, 10 minutes, and 30 minutes, the cool feeling intensity is evaluated.

Evaluation of body soap (1) Soak both hands in 40 ° C hot water for 30 seconds.
(2) About body soap, 200 microliters is dripped at the back of a hand with a micropipette, spreads over the whole back of a hand, and keeps it as it is for 1 minute.
(3) Rinse for 30 seconds without rubbing with hot water.
(4) Immediately after washing, the cool feeling strength after 5 minutes, 10 minutes and 30 minutes is evaluated.

Evaluation of bath preparation (1) A solution in which 0.25 g of bath preparation is dissolved in 1000 mL of warm water at 40 ° C. is prepared in a wash basin, soaked in the solution to the back of the hand and kept as it is for 1 minute.
(2) Pull your hand out of the solution and gently remove moisture with a towel.
(3) Immediately after 5 minutes, 10 minutes, and 30 minutes, the cool feeling intensity is evaluated.

The evaluation criteria of cooling feeling are as follows. The results are shown in Table 6.
3 points: Strong feeling of cooling 2 points: Moderate feeling of cooling 1 point: Poor feeling of cooling 0 points: No feeling of cooling

<Cooling sensation effect>
Toilet lotion> lotion (1)> lotion (4)> lotion (5)> lotion (6)> lotion (3)> lotion (2); hair tonic is hair tonic> Hair tonic (1); body soap is body soap> body soap (1); bath agent (a) is bath agent (a) ≈bath agent (a-1)> bath agent (a-2); bath agent In (b), the cooling effect and the sustainability were good in the order of bathing agent (b)> bathing agent (b-1).

<Evaluation of stimulation>
In the lotion, the lotion (2) feels irritation, the lotion (1) feels less irritation than (2), and the lotions (3) to (6) have less irritation than (2). It became.
In hair tonic, hair tonic> hair tonic (1); in body soap, body soap> body soap (1); in bath preparation, bath preparation (a-2)> bath preparation (a-1)> bath preparation (a ) And bathing agent (b), irritation was felt in the order of bathing agent (b-1)> bathing agent (b).

Claims (10)

  A cooling sensation agent composition comprising (a) menthol, (b) camphor and (c) fatty acid isopropyl, which is used under acidic conditions having a pH value of 3.0 to 6.8. Cosmetics for external use (excluding hair shampoo and hair rinse).   Water-soluble, comprising a cooling sensation agent composition comprising (a) menthol, (b) camphor and (c) fatty acid isopropyl, wherein the pH value is adjusted to 3.0 to 6.0. Cosmetics for external use (excluding hair shampoo and hair rinse).   The water-soluble external cosmetic according to claim 2, wherein the pH value is adjusted to 3.0 to 6.0 by adding an acid.   The water-soluble external cosmetic according to claim 3, wherein the acid is one or more acids selected from citric acid, malic acid, succinic acid and phosphoric acid.   The cooling sensation agent composition is a composition comprising 0.1 to 20 parts by mass of component (b) and 10 to 200 parts by mass of component (c) with respect to 100 parts by mass of component (a). The external cosmetic composition according to claim 1, or the water-soluble external cosmetic composition according to claim 2.   The external cosmetic composition according to claim 1 or the water-soluble external cosmetic composition according to claim 2, wherein the component (c) of the cooling sensation agent composition is one or two fatty acid isopropyls selected from isopropyl palmitate and isopropyl myristate. Fee.   6. The external cosmetic or the water-soluble external cosmetic according to claim 5, wherein the cooling sensation agent composition is blended so that the content of the component (a) in the cosmetic is 0.6 to 1% by mass.   It comprises a cooling sensation composition comprising (a) menthol, (b) camphor and (c) fatty acid isopropyl, and is used in bath water having a pH value of 4.5 to 6.8. Bath agent.   The bath agent according to claim 8, wherein an acid is blended so as to adjust the pH value of the bath water to 4.5 to 5.5.   a cooling sensation agent composition comprising (a) menthol, (b) camphor, and (c) fatty acid isopropyl, and a pH value of 4.5 g when 0.5 g of this agent is dissolved in 2000 mL of water. A bath agent characterized by containing an acid so as to be 5.5.