JPH0952813A - Skin cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a new skin cosmetic excellent in skin beautifying effect attributable to the improvement of dry feeling, shortage of glossiness, fine wrinkles, rough skin, etc., and also excellent in safety by using an extract obtained from a specific plant belonging to the family Labiatae. SOLUTION: This cosmetic is obtained by using an extract of catnip belonging to the family Labiatae. Leaves, flowers, stems or a whole plant of catnip is extracted by immersing into a hot medium of an aqueous organic solvent or a hydrated aqueous organic solvent at an immersing temperature from the ambient temperature to the boiling temperature of the extraction medium. Subsequently, the extraction liquid is subjected to suction filtration followed by the concentration under reduced pressure to remove the solvent. Thus, a viscous or exsiccated extract is obtained. Further, the extraction solvent is preferably a hydrated aqueous organic solvent preferably containing >=50wt.% of an aqueous organic solvent such as a monovalent alcohol or acetone. The skin cosmetic is supplied in various kinds of preparations including a skin lotion, an emulsion, a cream, a pack, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel skin cosmetic, and more specifically, to provide a skin cosmetic excellent in beautiful skin effect by improving dry feeling, insufficient gloss, fine wrinkles and rough skin.

[0002]

2. Description of the Related Art Conventionally, skin cosmetics have been blended with various animal and plant extracts or various compounds for the purpose of preventing rough skin and improving wrinkles. For example, animal and plant extracts include placenta extract, extract such as yokuinin, gougon, and bukuro (JP-A-57-31604, JP-A-59-73509, JP-A-60-78).
Compounds include tranexamic acid, retinol derivatives and the like (see JP-A-4-154710 and JP-A-2-59518).

[0003]

However, as mentioned in the above examples, various types of animal and plant extracts and various compounds have been applied to the skin cosmetics provided so far. There are few such compounds exhibiting a significant effect, and those having a certain degree of effect as a compound have such drawbacks that they are so irritating that they cause dermatitis and that continuous use is difficult.

[0004] The present invention has been made in view of such circumstances, and is excellent in a beautiful skin effect by improving dry feeling, lack of luster, fine wrinkles and rough skin on the skin, and a safety that can sufficiently withstand long-term use. An object of the present invention is to provide a skin cosmetic having properties.

[0005]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventor has found that an extract obtained from a specific plant belonging to the Labiatae family has an excellent skin-beautifying effect on the skin. In addition, they have found that there is no safety problem during use, and have completed the present invention based on such findings.

[0006] That is, the present invention relates to a skin cosmetic which is characterized by containing an extract obtained by suitably extracting from a Labiatae mint minnow with a water-soluble organic solvent or a water-containing water-soluble organic solvent.

The present invention will be described in detail below.

The dognose mint (scientific name: Nep) applied to the present invention
eta Cataria) is a perennial plant that belongs to the Lamiaceae genus India, which grows naturally in the central and Ou regions of Honshu, and is also known as Chikuma mint or catnip. So far
It was known that dried leaf and flower stalks were used for internal medicine and seasonings, but it was not applied practically from the external point of view, and the skin-beautifying effect on the skin was also verified. No examples are found, and were first found by the inventor.

Next, as a method for obtaining an extract from the above-mentioned mint, the leaves, flower stems or whole plants of the mint are various solvents such as hot water, primary alcohols such as methanol, ethanol, propanol and butanol, and 1,3-butylene glycol. , A polyhydric alcohol such as propylene glycol, or a water-soluble organic solvent such as acetone, tetrahydrofuran, or dioxane, and hexane, ether, chloroform, or a poorly water-soluble organic solvent such as ethyl acetate at room temperature to the boiling point of the extraction solvent. , Digestion extraction is performed once or twice at room temperature for 7 to 10 days and at heating for 4 to 8 hours. These extracts are combined, filtered with suction, and then concentrated under reduced pressure to remove the solvent to obtain a viscous or dried extract.

Among the above extraction solvents, primary alcohols, polyhydric alcohols or water-soluble organic solvents such as acetone, tetrahydrofuran, dioxane are used alone, or
Alternatively, it is advantageous in the present invention to use a water-containing water-soluble organic solvent containing a primary alcohol, a polyhydric alcohol or a water-soluble organic solvent such as acetone, tetrahydrofuran or dioxane, preferably 50% by weight or more.

[0011] Here, the content of the extract of mint in the present invention is preferably 0.00 based on the total skin cosmetics.
01 to 10% by weight, particularly preferably 0.01 to 5% by weight
It is. If the content is less than 0.0001% by weight, the desired effects of the present invention will not be sufficiently exhibited.

[0012] In addition to the above-mentioned mint extract, the skin cosmetic of the present invention may optionally contain various components and additives used in ordinary skin cosmetics such as inorganic pigments, organic pigments and inorganic pigments. Powder, organic powder, hydrocarbons, silicones, esters, triglycerides, lanolins, waxes, waxes, animal and vegetable oils, surfactants, polyhydric alcohols, sugars, vitamins, amino acids, oxidation Inhibitors, preservatives, fragrances, thickeners, UV protectors, alcohols, pH adjusters, water and the like can be added.

As the skin cosmetic of the present invention, various dosage forms,
Examples thereof include lotions, emulsions, creams, packs, foundations, lipsticks, etc., which are prepared according to a conventional method.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Here, an example of the production of an extract of mint in the present invention will be described. Production Example 1. 100 g of the dried whole plant of Inna mint was immersed in 1 liter of 70% ethanol at room temperature for 10 days for immersion extraction, the residue was filtered off with a filter paper, and the filtrate was evaporated to dryness to obtain an extract. (Yield 1.5%)

Manufacturing Example 2. 100 dried whole plants of Inna mint
g is immersed in 1 liter of ethanol, transferred to a Soxhlet extractor, and subjected to warm extraction for 8 hours. After cooling, the residue was filtered off with filter paper, and the filtrate was evaporated to dryness to obtain an extract. (Yield 2.7%)

Production Example 3. 100 dried whole plants of Inna mint
g is immersed in 1 l of acetone, transferred to a Soxhlet extractor, and subjected to warm extraction for 8 hours. After cooling, the residue was filtered off with filter paper, and the filtrate was evaporated to dryness to obtain an extract. (Yield 2.4%)

Production Example 4. 100 dried whole plants of Inna mint
g is immersed in 1 liter of butanol, transferred to a Soxhlet extractor, and subjected to warm extraction for 8 hours. After cooling, the residue was filtered off with filter paper, and the filtrate was evaporated to dryness to obtain an extract. (Yield 1.7%)

Production Example 5. 100 dried whole plants of Inna mint
g is immersed in 1 l of an extraction solvent of propylene glycol: distilled water = 1: 1, transferred to a Soxhlet extractor, and subjected to warm extraction for 8 hours. After cooling, the residue was filtered off with filter paper, and the filtrate was evaporated to dryness to obtain an extract. (Yield 1.2%)

Next, in order to demonstrate how the skin cosmetic composition of the present invention is excellent in terms of the skin-beautifying effect, an actual use test was conducted using the lotion shown in Example 1 below, and its efficacy was evaluated. confirmed. As comparative products, a lotion prepared by substituting a placenta extract (commercially available placenta extract) for the minty extract of lotion of Example 1 described later (comparative product 1) and a minnow extract of lotion of Example 1 described later Was used (comparative product 2) after removing (increasing the amount of water). The test method is as shown below.

(Test Method) Seventy-five adult Japanese women with dry skin, 25 of whom were each randomly divided into three groups (A to C)
Group). A lotion of the present invention is applied to the face of group A, and B
The lotion of Comparative Product 1 was applied to the face of the group and the lotion of Comparative Product 2 was applied to the face of Group C for 4 weeks. After 4 weeks, comparisons between groups were made on the improvement of various evaluation factors and the status of spontaneous deterioration. For evaluation of the rough skin condition, the stratum corneum was isolated from the face skin by a tape stripping method, and the degree of delamination was determined by optical microscope observation of the stratum corneum according to the method described in JP-A-63-113358. The presence or absence of nuclear cells was evaluated on a 5-point scale. The results are shown in Tables 1 and 2.

[0021]

[Table 1]

[0022]

[Table 2]

As shown in the results of Tables 1 and 2, the lotion of the product of the present invention gave good results over all the evaluation items as compared with the lotion of the comparative product, in particular, improved dry feeling, It was proved that the rough skin was remarkably improved and the skin-beautifying effect was excellent. In addition, as an opinion other than the above evaluation factors, it was also clarified that the cosmetic of the present invention had no adverse effects on safety such as irritation and skin irritation during use.

[0024]

EXAMPLES Examples of the present invention will be shown below. The mixing ratio is parts by weight.

Example 1. Lotion (A) Purified water 78.89 Glycerin 5.0 Propylene glycol 4.0 (B) POE (20) Sorbitan monolaurate 1.5 POE (20) Lauryl ether 0.5 Ethanol 10.0 Dognava extract (Production Example 2) 0.01 Perfume 0.1

(Preparation Method) The components of (A) are combined and dissolved at room temperature. On the other hand, each component of (B) is also dissolved at room temperature, and is added to (A) formulation and solubilized.

Example 2. Emulsion (A) POE (20) hydrogenated castor oil 1.5 coconut oil fatty acid monoglyceride 1.0 oleic acid triglyceride 7.5 (B) glycerin 2.5 dog mint extract (Production Example 1) 1.0 refined water 86 .3 (C) Fragrance 0.2

(Preparation method) The ingredients of (A) were combined, heated and mixed to 70 ° C. Combine each component of (B) and add 7
Heat and mix at 0 ° C, add the (A) formulation to this, emulsify,
Add (C) while cooling.

Example 3. Hand cream (A) Vaseline 18.0 Cetanol 8.0 POE (20) oleyl ether 1.4 Sorbitan monostearate 0.8 (B) Antiseptic 0.3 Dogmint extract (Production Example 4) 0.5 Refined Water making 70.8 (C) Fragrance 0.2

(Preparation method) The same method as in Example 2 was used.

Example 4. Cream (A) POE (30) Cetyl ether 2.0 Glycerin monostearate 10.0 Liquid paraffin 10.0 Vaseline 4.0 Cetanol 5.0 Antiseptic 0.2 (B) Propylene glycol 10.0 Dognip extract (Production Example 5) 2.0 Purified water 56.8

(Preparation method) Combine the components of (A) and
Heat to 0 ° C. The components of (B) are combined and heated to 80 ° C. While stirring the formulation of (A), the formulation of (B) is added thereto, and the mixture is stirred to emulsify and then cooled.

Example 5 Gel-like Cosmetic Oil (A) Sucrose Fatty Acid Ester 5.0 (Daiichi Kogyo Seiyaku DK Ester F-160) (B) 1,3-Butylene Glycol 10.0 Glycerin 24.4 Dog Mint Extract (Production Example 3) 0.1 Purified water 5.0 Preservative 0.3 (C) Liquid paraffin 20.0 Olive oil 30.0 2-Ethylhexanoic acid triglyceride 5.0 (D) Fragrance 0.2

(Preparation method) Combine the components of (B) and
Heat to 0-80 ° C. and dissolve (A) in this. To this, the formulation of (C) is added, and when cooled to 40 ° C., (D) is added and then cooled.

[0035]

According to the present invention, the beautiful skin effect such as improvement of the skin condition such as rough skin, lack of luster, fine wrinkles, etc. is remarkably superior to conventionally known skin roughening agents and the like. Needless to say, it can be used without adverse effects on safety.

Claims (2)

[Claims] 1. A skin cosmetic containing an extract of mint mint of the Labiatae family. 2. The skin cosmetic according to claim 1, wherein the extract is an extract obtained by extraction with a water-soluble organic solvent or a water-containing water-soluble organic solvent.