JPH0338508A - Water-based cosmetic - Google Patents

Abstract

PURPOSE:To obtain a water-based cosmetic which is free from stickiness on application with excellent moist feeling and good in stability with passage of the time by using a specific polyoxyethylene-added castor oil surface active agent and a specific ester oil. CONSTITUTION:The subject water-based cosmetic contains 0.05 to 5.0wt.% of a polyoxyethylene-added castor oil surfactant bearing 10 to 60 moles, preferably 20 to 40 moles of added ethylene oxide and 0.05 to 5.0wt.% of an oil of more than 30 carbon atoms bearing ester linkage in the molecule or an oil selected from naturally occurring oil mainly containing the same. The cosmetic has clear, translucent to opaque appearance, and can contain any components used in usual water-based cosmetics as well as the essential components stated above and can be used in soft lotion, nutrients-enriched lotion, astringent lotion, cleansing lotion, beauty lotion or hair lotion.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to aqueous cosmetics, and more particularly, to aqueous cosmetics that can be stably blended with a specific ester-based oil agent, that do not feel sticky when used,
This invention relates to an aqueous cosmetic with excellent moist feeling (emollient feeling).

[Conventional technology and its problems]

Conventionally, various oils have been used to impart emollient effects to the skin. Among these, ester oils have high emollient, moisturizing, and protective effects on the skin, and are therefore widely used in creams, emulsions, lotions, and the like. In particular, ester oils having 29 or less carbon atoms in the molecule are often used as emollients in aqueous cosmetics such as lotions.

However, even when such an ester oil is used, a sufficient moist feeling cannot be obtained, and when an amount sufficient to obtain an effect is added, the product becomes sticky.

On the other hand, when ester oils with a carbon number of 30 or more in the molecule are used in water-based cosmetics, a very good moist feeling can be obtained with a small amount and there is no stickiness, but the stability is poor and separation may occur at high temperatures. Turbidity changes over time. Furthermore, if a large amount of surfactant is added in order to improve stability, the problem arises that the product becomes sticky, so these ester oils have not been used in practice.

Therefore, it has been desired to develop an aqueous cosmetic that has good stability over time, is not sticky, and has an excellent moist feel.

[Means to solve the problem]

Under these circumstances, the present inventors conducted intensive research and found that if a polyoxyethylene-added castor oil-based surfactant with an added ethylene oxide mole number of 10 to 60 moles is used, a specific ester-based oil agent can be used. The present invention has been completed based on the discovery that an aqueous cosmetic can be stably blended and provide a non-sticky and moist feeling when used.

That is, the present invention includes the following components (^) and (B) (A)
Polyoxyethylene-added castor oil surfactant with an added mole of ethylene oxide of 10-60 moles 0.05-5.0% by weight (8) One or more ester bonds in the molecule, and carbon Provided is an aqueous cosmetic characterized by containing 0.05 to 5.0% by weight of one or more oils selected from over thirty oils and natural oils containing these oils as main ingredients. It is something to do.

The polyoxyethylene-added castor oil-based surfactant (A) of the present invention, which is the M component, is one in which ethylene oxide is added to castor oil or hydrogenated castor oil, or one in which a fatty acid is further added, The number of moles of ethylene oxide added is 10 to 60 moles, preferably 20 to 40 moles. Specifically, for example, t if Nikkor HCO<
These polyoxyethylene-added castor oil surfactants may be used alone or in combination of two or more. can be used in combination, and 0.
It is preferable to mix 05 to 5.0% by weight (hereinafter simply expressed as %). If it is less than 0.05%, it is difficult to stably blend the ester oil agent (1), and if it exceeds 5.0%, it feels sticky when used, which is not preferred.

The oil agent (B) BjE component of the present invention is an oil agent that has one or more ester bonds in the molecule and has 30 or more carbon atoms, or a natural oil agent that contains these oil agents as a main component, and among these, In particular, it is preferable that the fatty acid constituting the ester has 8 or more carbon atoms. Specifically, esters of monohydric alcohols and fatty acids such as cetyl palmitate, octyldodecyl myristate, octyldodecyl erucate, cholesterol isostearate, and cholesterol hydroxystearate; glyceryl trilaurate, glyceryl trioleate, and tristearic acid. Polyhydric alcohol and fatty acid esters such as glycerin and dipentaerythritol fatty acid ester; olive oil, safflower oil, soybean oil, macadamian nut oil, meduhome oil, coconut oil, avocado oil, evening primrose oil, gay wax, jojoba oil, etc. Examples include natural oils. These oil agents can be used alone or in combination of two or more, and are preferably blended in an amount of 0.05 to 5.0% in the aqueous M*4 of the present invention. If it is less than 0.05%, a moist feel cannot be obtained, and if it exceeds 5.0%, it feels sticky when used, which is not preferable.

Further, it is preferable that 50 to 99% of water is blended into the aqueous cosmetic composition of the present invention.

Furthermore, the aqueous cosmetic of the present invention includes, in addition to the above-mentioned essential ingredients,
Ingredients used in ordinary water-based cosmetics, such as water-soluble polymers, ethanol, polyhydric alcohols, salts, bases, acids, fragrances, pigments, preservatives, ultraviolet absorbers, metal chelating agents, oils other than the above, and other than the above. Surfactants, vitamins, skin beautifying ingredients, etc. can be appropriately selected and used within a range that does not impair the effects of the present invention.

The aqueous cosmetic composition of the present invention has a transparent to translucent to cloudy appearance, and can be produced according to a conventional method using appropriately selected components from the above-mentioned essential components and optional components. For example, it can be applied as a softening lotion, a nutritional lotion, an astringent lotion, a cleaning lotion, a beauty serum, a hair lotion, and the like.

〔Example〕

Hereinafter, the present invention will be explained in more detail with reference to Examples.
The present invention is not limited to these examples.

Example 1 Aqueous cosmetics having the compositions shown in Table 1 were prepared and evaluated for stability and feel during use. The results are shown in Table 1.

(Kaiho) (A) Mix and dissolve lljE components (1) to (11) at 50°C.

(B) Mix f&min (12) and (13), add (A) to this and mix.

(Transparency measurement) Transmittance (%) at 500 nm was measured using a spectrophotometer using a 1 cm thick square quartz cell for aqueous cosmetics immediately after production and after storage for one month at 5°C, room temperature, and 40°C. 11V-160 (manufactured by Shimadzu Corporation). 10
0 indicates completely transparent state, and 0 indicates completely cloudy state.

(Stability) The aqueous m$4 that had been stored for one month under each temperature condition of 5°C, room temperature, and 40°C was checked for changes in appearance compared to the product immediately after production.

Items with no particular changes were considered good, and items with changes were expressed and described.

(Sensory evaluation) A usage test was conducted with a panel of 20 female experts, and a five-point rating was given for stickiness and moist feeling.

(Evaluation criteria!!11) Stickiness Very sticky; 1 point Slightly sticky; 2 points Can't say either way; 3 points Slightly not sticky; 4 points Not sticky at all; 5 points Moist feeling Not moist feeling at all; 1 point Slightly moist No feeling; 2 points: Not sure; 3 points: Slightly moist feeling; 4 points: Very moist feeling; 5 points (judgment) Average score: 4 to 5 points; ○ 〃2.1 to 3.9 points: △〃 1 point to 2 points;
It has a cloudy appearance and has superior stability over time compared to comparative products.
Moreover, it did not have a sticky feeling after use and had a moist feel.

Example 2 Astringent lotion: (Ingredients) (%) (1) Isostearic acid 1106 days (40 mol) 0.2
Hydrogenated castor oil (2) and cholesteate droxystearate 0.08 lyl (3) citric acid 0.0
5(4) Sodium citrate 0.2
(5) Dipotassium glycyrrhizinate 0.1 (6
) Ethanol 8.0 (7)
Propylene glycol 7.0 (8)
Water production Remaining amount (ml method) (^) Mix and dissolve components (1), (2), (5), and (6) at 50°C.

(Day) Mix ingredients (3), (4), (7), and (8).

(C) Add (A) to (B) and mix.

The astringent lotion thus obtained had a transparent appearance, was not sticky to the touch, had an excellent moist feeling, and had good stability over time without any change in transparency.

Example 3 Beauty serum: (Ingredients) (%) (1) P, 0.B (20 mol) castor oil
1.0 (2) Jojoba oil 1
．． 0 (aN, 3-butylene glycol 10.0
(4) Glycerin 4.0 (5
) Methylcellulose 0,05(6)
Hyaluronic acid solution (1%) 1.0 (7) Purification Water Remaining amount (manufacturing method) (^) Mix and dissolve (1), (2), and (7) at 70°C for 1 minute.

(8) Components (3) to (6) are mixed, added to (A), and mixed and cooled.

The serum obtained in the above manner is a slightly viscous lotion with a translucent appearance, and has a non-sticky and moist feel when used, and has good stability over time without any change in translucency. Met.

〔Effect of the invention〕

As detailed above, the aqueous cosmetic of the present invention does not feel sticky when used, has an excellent moist feeling, and also has good stability over time.

that's all

Claims (1)

[Scope of Claims] 1. Components (A) and (B) (A) A polyoxyethylene-added castor oil surfactant in which the number of moles of ethylene oxide added is 10 to 60 moles. 0% by weight (B) One or more oils selected from oils having one or more ester bonds in the molecule and having 30 or more carbon atoms, and natural oils containing these oils as main components. An aqueous cosmetic characterized by containing 05 to 5.0% by weight.