JP3939857B2 - Skin cosmetics - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a skin cosmetic having an action of eliminating active oxygen.
[0002]
[Prior art]
Active oxygen generated in the skin by ultraviolet rays or the like is considered to be one of the causes of aging by damaging the stratum corneum of the skin, epidermal cells, and dermal cells. With aging skin, the stratum corneum is dry and not smooth, and rough skin and exfoliation of the stratum corneum are observed. It is also known that the number of epidermal cells decreases, the epidermal cell metabolism decreases, and the skin turnover rate slows down. In the dermis, wrinkles and sagging are observed due to a decrease in hyaluronic acid and denaturation of collagen and elastin. Conventional skin cosmetics having an action of eliminating active oxygen include an extract extracted from parsley (hereinafter referred to as parsley extract) (Japanese Patent Laid-Open No. 9-212410).
[Problems to be solved by the invention]
[0003]
However, in the cosmetics containing the parsley extract alone, the nature of the activity does not easily penetrate into the skin, and the effect of the parsley extract alone is not sufficient. When used alone, there was a problem in the stability of the parsley extract on the skin, and the usability was poor.
[0004]
In recent years, the amount of ultraviolet rays has been increased due to the destruction of the ozone layer, which is harmful to the skin and is known to be one of the causes of aging, as well as the activation of damaged skin cells. In addition, there is a long-awaited development of cosmetics that can cope with skin dryness caused by environmental destruction and changes.
[0005]
Therefore, as a result of intensive studies in view of such problems, the present invention has dramatically improved active oxygen scavenging action, cell activation action, and moisturizing action as compared with the case where parsley extract is blended alone, By erasing active oxygen, recovering damage to skin cells caused by daily ultraviolet rays, preventing damage to skin fibers, adjusting the turnover of epidermal cells in the skin, and enhancing biosynthesis of collagen An object of the present invention is to provide a skin cosmetic having a skin beautifying effect of maintaining skin elasticity and maintaining youthful skin, and to solve the above problems.
[0006]
[Means for Solving the Problems]
The invention of claim 1 comprises parsley extract 0.01 to 2.0% by weight, beech tree extract 0.01 to 2.0% by weight, and 1,2 pentanediol 0.01 to 20.0% by weight. It was set as the skin cosmetics to contain.
[0007]
Example of embodiment
Embodiments of the present invention will be described below.
The parsley extract used in the present invention is an extract extracted from the leaves, stems, roots and whole grass of parsley (Petroselium sativum), and the extraction solvent is not particularly limited, but water, 1,3-butylene glycol, ethanol, It is a solvent such as glycerin and is an extract that is extracted alone or in a mixture of two or more. The beech tree extract is an extract extracted from young shoots of beech tree (Fagus silvatica L.), and the extraction solvent is not particularly limited, but is a solvent such as water, 1,3-butylene glycol, ethanol, glycerin and the like. It is an extract extracted by a single solution or a mixture of two or more.
[0008]
1,2-pentanediol used in the present invention is a kind of divalent aliphatic alcohol and is a known substance and has the following properties.
Molecular weight: 104 Molecular formula: C ↓ 5H ↓ 120 ↓ 2 Appearance: Colorless and transparent liquid This substance is used in cosmetics as a moisturizing ingredient and can be easily obtained and incorporated into the skin cosmetics of this invention. Although it is possible, what was synthesize | combined by the well-known method can also be mix | blended in this skin cosmetics.
[0009]
The amount of the parsley extract used in the present invention is 0.001 to 10.0% by weight, more preferably 0.01 to 2.0% by weight, based on the total amount of skin cosmetics. A compounding quantity is 0.001-10.0 weight% on the basis of the total amount of skin cosmetics, More preferably, it is 0.01-2.0 weight%. The blending amount of 1,2-pentanediol is preferably 0.01 to 20.0% by weight based on the total amount of skin cosmetics.
[0010]
By combining the parsley extract, the beech tree extract, and 1,2-pentanediol within this range, the intended effect of the present invention can be obtained.
[0011]
The skin cosmetic of the present invention can be applied to, for example, facial cleansers, lotions, emulsions, creams, packs and the like.
In addition to the above, pigments, fragrances, preservatives, surfactants, pigments, antioxidants, and the like can be appropriately added to the skin cosmetic of the present invention within the scope of achieving the object of the present invention.
[0012]
【Example】
Next, this invention is explained in full detail based on an Example and a comparative example. The rough skin improvement effect test, stratum corneum turnover measurement test, and sensory test used in the present invention are as follows.
[0013]
[Rough skin improvement effect test]
10 middle-aged and elderly subjects with rough skin on the lower leg were applied continuously for 4 weeks to evaluate the effect. That is, about 0.5 g of a sample was applied to the subject's left lower leg outer test site once a day, and the skin condition before and after the test was determined according to the criteria shown in Table 1. The lower right leg was used as a control without applying the sample. Compare the test results of the test site before and after the test with the control site, and when the skin dryness is improved by 2 or more levels (for example, + →-, ++ → ±), it is effective and when it is improved by 1 level, it is slightly effective The case where there was no change was invalidated. The test results were shown as the number of subjects who became effective or slightly effective.
[0014]
[Table 1]
[0015]
[Turnover measurement test of stratum corneum]
An ointment containing 5% by weight of fluorescent dye dansyl chloride in white petrolatum was prepared and applied to the skin of the forearm of 10 subjects for 24 hours to allow osmotic bonding of dansyl chloride to the stratum corneum. Then apply about 0.2g of test fee to the same site twice a day (morning and evening), and check the fluorescence of dansyl chloride using an ultraviolet lamp in the dark once a day until the fluorescence disappears. The number of days was defined as the turnover of the skin stratum corneum. The measurement result was shown by the average value of the days of each test subject. The turnover of the normal skin stratum corneum is 13 to 16 days, but in aging skin, it extends to around 18 days. On the other hand, when the anti-aging effect appears, it is shortened to around 13 days.
[0016]
[Sensory test (Beautiful skin effect test)]
Samples were applied to 10 female test subjects (35 to 55 years old) complaining of rough skin, fine lines, dry skin, etc. twice a day (morning and evening) for 4 consecutive weeks, and the effects after 4 weeks were evaluated. The test results are shown in terms of the number of people who answered that the skin was moistened, smoothed, and stretched for each item of skin wettability, smoothness, and elasticity.
[0017]
[ Comparative Examples 1 to 5 and Example 1 ]
The cosmetic liquids having the compositions shown in Table 2, Comparative Examples 1 to 5 and Example 1 were prepared according to conventional methods, the tests were conducted, and the results are shown in Table 3.
[0018]
Table 2
[0019]
Table 3
[0020]
From the results of Table 3 above, the basic cosmetic liquid of Comparative Example 1 and the cosmetic liquid of Comparative Example 1 each containing a parsley extract, beech tree extract, and 1,2-pentanediol separately, that is, Compared with Comparative Example 2, Comparative Example 3, Comparative Example 4, and parcel extract and beech tree extract in combination, ie, Comparative Example 5, parsley extract 0.01% by weight, beech tree extract 0. It was shown that the cosmetic liquid formulated by combining 01% by weight and 1,2-pentanediol 0.001% by weight, that is, Example 1, has both a rough skin improving effect, a turnover promoting effect, and a beautiful skin effect.
[0021]
[ Comparative Examples 6 to 10 and Example 2 ]
The creams of the composition shown in Table 4, Comparative Examples 6 to 10 and Example 2 were prepared according to conventional methods, the tests were conducted, and the results are shown in Table 5.
[0022]
[Table 4]
[0023]
[Table 5]
[0024]
From the results shown in Table 5, cream parsley extract cream and Comparative Example 6 Comparative Example 6 in which the basic, beech extract, cream formulated 1,2 pentanediol alone respectively, i.e., Comparative Example 7, Comparative Example 8, Comparative Example 9, and a cream containing a combination of parsley extract and beech tree extract, that is, 0.01% by weight of parsley extract, 0.01% by weight of beech tree extract, and It was shown that the cosmetic liquid formulated by combining 0.001% by weight of 1,2-pentanediol, that is, Example 2, has high rough skin improving effect, turnover promoting effect, and skin beautifying effect.
[0025]
【The invention's effect】
As described above, the invention of claim 1 is excellent in skin aging prevention effects (rough skin improvement effect, stratum corneum improvement effect, effect of accelerating turnover of the stratum corneum, skin beautifying effect, etc.) by the active oxygen scavenging action. Skin cosmetics can be provided.

Claims (1)

Skin containing 0.01 to 2.0% by weight of parsley extract, 0.01 to 2.0% by weight of beech tree extract, and 0.01 to 20.0% by weight of 1,2 pentanediol Cosmetics.