JP2003286152A - Skin care cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prepare a mild astringent cosmetic having persistency. <P>SOLUTION: A skin care cosmetic is obtained by formulating an extract having astringent activities obtained by extracting back of a pine belonging to Pinus radiate with water preferably together with a volatile silicone. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skin cosmetic composition containing a special pine bark extract.

[0002]

2. Description of the Related Art Conventionally, cosmetics have been put on the market for the purpose of astringent action as one of the cosmetic effects. For example, there is a mixture of acids such as citric acid, carboxylic acid (zinc sulfocarbonate), and α-hydroxy acid.

[0003]

However, in these conventional astringent cosmetics, since the astringents to be blended are of the type that exert their effects in water, no one other than lotion has been marketed and blended. The current situation is that the problem of skin irritation caused by lactic acid has not been solved. Therefore, development of a milder and more durable astringent cosmetic has been desired.

[0004]

Means for Solving the Problems As a result of intensive studies in view of the above problems, the present inventor has found that an extract having an astringent effect obtained by water extraction from the bark of pine of Peanus radiata is an essential component. Skin cosmetics characterized by being blended, further, the above-mentioned skin cosmetics characterized by being blended with volatile silicone, and extraction obtained by water extraction from the bark of pine of Phenus radiata The present invention has found a skin astringent cosmetic characterized in that it comprises a substance and a volatile silicone as essential components. Thus, according to the present invention, there is provided a cosmetic having a mild astringent action and an astringent action.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is described in detail below.
Pineus radiata pine is generally used for timber, but in the present invention, its bark is used. The Pineus radiata pine used preferably in the present invention is from New Zealand, and more preferably grown in an alpine region. As a water extraction method for bark used in the present invention, a generally known water extraction method can be used. Preferably, the bark is cut into pieces of 15 mm or less and subjected to water extraction. The water used for the extraction is preferably deoxygenated water, and deoxygenated hot water is particularly preferably used. A preferable extraction condition is 60 to 60 at atmospheric pressure.
100 ° C., 1 minute to 20 hours. An extract obtained by hot water extraction from the bark of a pine tree of Peanus radiata from New Zealand is Enzo Nutvace of New Zealand.
It is supplied by Utica under the product name "Enzogenol". The extract is a flavonoid mixture,
Its characteristic is that it is rich in polymeric proanthocyanidins as shown in Table 1.

[0006]

[Table 1]

The present inventor has found that this polymeric proanthocyanidin has a large astringent action, and further, by preparing an emulsion, cream, essence or lotion containing the pine bark extract and volatile silicone, They have found that the cosmetic composition has a mild astringent effect and is excellent in safety and stability. Proanthocyanidin is a mixture of oligomers in which flavan-3-ol or flavan-3,4-diol is used as a constitutional unit and is bound by condensation or polymerization, and in the above trade name "Enzogenol", proanthocyanidins are different from others as shown in Table 1. It was found that it was abundantly contained compared to the extract of E. coli, and for that reason, its astringent action was also large. The preferable amount of the water extract from the bark of pine tree of Pinus radiata species in the skin cosmetic is 0.01 to 10%, and if it is less than 0.01, a sufficient astringent effect cannot be obtained, and 10% is added. If the amount exceeds the above range, the effect associated with the increase of the compounding amount is diminished, which causes a problem in cost and is not preferable.

The volatile silicone used in the present invention is
Although not particularly limited, examples thereof include 3-membered ring volatile silicone, 4-membered ring volatile silicone, 5-membered ring volatile silicone, and 6-membered ring volatile silicone. Particularly preferred volatile silicone is 5 in terms of safety and effect.
It is a member-ring volatile silicone. The preferred content of the volatile silicone is 0.1 to 30% by weight, more preferably 1 to 10% by weight. If it is less than 0.1, no sufficient effect is obtained, and if it exceeds 30%. And the feeling of use of the cosmetic is impaired, which is not preferable.

The skin cosmetic of the present invention can be formulated into emulsions, creams, essences, lotions, cartilage, packs, powders, facial cleansers, soaps, etc. according to a conventional method. It is possible. For example, when water extract from pine bark of Pineus radiata species and volatile silicone are blended in a cream, the cream applied to the skin gradually evaporates the volatile silicone. Since the relative concentration of the water extract from the bark of the pine tree of Peanus radiata remaining on the top increases, as a result, the astringent effect is further increased, and even a small amount of the compound provides a very excellent cosmetic effect. is there.

Further, in the present invention, as a point to be noted when preparing a formulation, it is more desirable to add a thickener from the viewpoint of feeling. Examples of the thickener include gums such as gum arabic and karaya, natural water-soluble polymers such as casein, dextrin, gelatin, pectin, starch and cellulose, synthetic water-soluble polymers such as polyvinyl alcohol and polyvinylpyrrolidone. And the like, and is appropriately selected depending on the dosage form.
In addition, an aqueous component, a powder, a surfactant, an oil agent, a moisturizer, a whitening agent, alcohols, a pH adjusting agent, an antiseptic, a pigment, a fragrance, etc. may be appropriately added to the cosmetic of the present invention, if necessary. You can

[0011]

The present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.
The following method was used as a method for evaluating cosmetics produced according to the present invention. Astringent effect evaluation method: The following two evaluation methods were adopted as the astringent effect evaluation method. << Evaluation method-1 >> (1) Take out only the egg white from raw egg, add 100 ml of 0.05M phosphate buffer (pH = 7.0) to 2.5 g of egg white, and stir to make 2.5% egg white liquid . (2) Astringent substance to be evaluated 0.02 g and ethanol 0.2 m
l was added and dispersed, and then 0.05 M phosphate buffer (pH
= 7.0) 20 ml is added to first make a 0.1% solution of the substance to be evaluated. In addition to this solution, 0.05M phosphate buffer (p
H = 7.0), 0.02%, 0.04%, 0.
Prepare 06%, 0.08% and 0.10% solutions. (3) The blank is a solution prepared by adding 20 ml of 0.05 M phosphate buffer (pH = 7.0) to 0.2 ml of ethanol. (4) 2.5 ml of the egg white liquid prepared in (1) was added to 0.4 ml of the diluted solution of each concentration of the astringent substance to be evaluated prepared in (2).
Add 5 ml, stir well, and measure the transmittance at 650 nm with a spectrophotometer.

The protein of egg white of the raw egg undergoes protein denaturation by an astringent and is suspended. The larger the protein denaturation, the higher the suspension of the liquid, and the greater the astringent effect. Also,
Since the large degree of protein denaturation also leads to the stimulation of skin proteins, the degree of astringent action on the skin can be determined by the evaluation by this method.
That is, the smaller the degree of suspension, the more mild the astringent effect. The one with a high degree of suspension is A (that is, the astringency is large and the irritation is large), the medium is B (the astringent and the irritation is also present), and the small one is the C (astringent and the irritation is mild) The evaluation results are shown in Table 2.

<< Evaluation Method-2 >> A cosmetic prepared according to the present invention is applied to human skin, and astringent properties and skin irritation are evaluated sensibly. The evaluation results are shown in Table 3. In addition, with acids such as citric acid, carboxylic acid, and α-hydroxy acid which are currently used as astringents, the effect of astringent action disappears at all when compounded in an emulsion system such as cream or emulsion. Therefore, as a comparative example, a cosmetic lotion currently on the market is used as a comparative example.

[0014] Example-1 Cream formulation               Glycerin 9.0%               1,3-butyl alcohol 4.0%               PEG4000 1.0%               Sodium pyrrolidone carboxylic acid 0.2%               NaCl 0.8%               Cation-treated clay 0.3%               Decamethylcyclopentasiloxane 7.0%               Octamethylcyclotetrasiloxane 3.0%               Isocetyl octanoate 2.0%               Dimethylpolysiloxane (20cps) 3.5%               Squalane 1.0%               Silicic anhydride 0.2%               Enzogenol 0.5%               Methylparaben 0.2%               Phenoxyethanol 0.2%                     Make up to 100 with purified water. A cream was obtained by the conventional method according to the above formulation.

[0015] Example-2 Emulsion               Dimethyl polysiloxane (20 cps) 5.0%               Decamethylcyclopentasiloxane 5.0%               Propylene glycol 6.0%               Glycerin 4.0%               Carboxy vinyl polymer 0.1%               Acrylic acid / alkyl methacrylate copolymer 1.0%               NaOH 1.0%               Monostearate POE (20) sorbitan 2.0%               POE (15) oleyl ether 0.5%               Enzogenol 1.0%               Methylparaben 0.2%               Phenoxyethanol 0.2%                     The total amount is 100 with purified water. A milky lotion was prepared by the conventional method with the above formulation.

[0016] Example-3 Essence prescription               Propylene glycol 5.0%               PEG400 5.0%               Carboxy vinyl polymer 0.3%               Sodium alginate 0.3%               Octamethylcyclotetrasiloxane 5.0%               Decamethylcyclopentasiloxane 5.0%               NaOH 0.1%               Stearic acid 2.0%               POE (20) sorbitan monostearate 1.0%               Sorbitan monooleate 6.5%               Enzogenol 1.0%               Methylparaben 0.2%               Phenoxyethanol 0.2%                     Make up to 100% with purified water. Based on the above formulation, it was manufactured by a conventional method to obtain an essence.

[0017] Example-4 Lotion (emulsion type)               1,3 butylene alcohol 6.0%               PEG4000 5.0%               Olive oil 3.0%               Monostearate POE (20) sorbitan 1.5%               POE (15) oleyl ether 0.3%               Enzogenol 0.5%               Octamethylcyclotetrasiloxane 5.0%               Decamethylcyclopentasiloxane 5.0%               Methylparaben 0.2%               Phenoxyethanol 0.2%                     Make up to 100% with purified water. A lotion was prepared by a conventional method based on the above formulation.

[0018] Comparative Example-1 Chemical lotion               Dipropylene glycol 1.0%               Sorbit 1.0%               POE (20) oleyl ether 1.0%               Zinc sulfocarbonate 0.2%               Citric acid 0.1%               Ethanol 15.0%               Methylparaben 0.2%               Phenoxyethanol 0.2%                     Make up to 100% with purified water. Based on the above formulation, a lotion was manufactured by a conventional method to obtain a lotion.

[0019]

[Table 2]

From the results shown in Table 2, it was found that citric acid and zinc sulfocarbonate had the highest degree of suspension, and the lowest was enzogenol. That is, it was found that Enzogenol is the mildest astringent with the least skin irritation.

[0021]

[Table 3]

From the results shown in Table 3, it can be seen that in Examples 1 to 4 of the present invention, weak astringent properties are felt, but there is no skin irritation, and the astringent cosmetics are mild.
On the other hand, the conventional type Comparative Example-1 has strong astringency, but also has strong skin irritation. From the above, it can be seen that the cosmetic of the present invention has a mild astringent property that cannot be achieved by conventional products.

[0023]

EFFECTS OF THE INVENTION The skin cosmetic of the present invention has a milder and longer lasting astringent action than conventional products.

Continued front page    F-term (reference) 4C083 AA111 AA122 AB032 AB172                       AB332 AB442 AC022 AC122                       AC172 AC232 AC342 AC442                       AC482 AC612 AD042 AD092                       AD151 AD152 AD172 AD302                       CC04 CC05 DD27 DD33 EE10                       EE12

Claims (3)

[Claims] 1. A skin cosmetic comprising an extract having an astringent action, which is obtained by extracting water from pine bark of Peanus radiata species, as an essential component. 2. The skin cosmetic according to claim 1, further comprising a volatile silicone. 3. A skin astringent cosmetic comprising an extract obtained by water extraction from pine bark of Peanus radiata species and a volatile silicone as essential components.