JPH0899832A - Emulsified cosmetic for skin - Google Patents

Abstract

PURPOSE: To obtain the subject cosmetic effectively suppressed in the greasiness due to the oil component used despite its large amount, and capable of presenting excellent use feeling, comprising a specific poly(alkylated vinylpyrrolidone), oil component and specific surfactant at specified proportions. CONSTITUTION: This cosmetic for the skin excellent in use feeling and having good emulsion stability comprises 0.1-20wt.% of a poly(alkylated vinylpyrrolidone) made up of constituent unit of the formula (R1 -R4 are such that at least one of them is a 1-20C alkyl or alkenyl, the rest being H), 3-70wt.% of an oil component, and 0.5-20wt.% of an anionic or nonionic surfactant. The poly(alkylated vinylpyrrolidone) is esp. pref. poly(hexadecenylated vinylpyrrolidone) having 5000-18000 of average molecular weight. The oil component is e.g. liquid paraffin, squalane, olive oil. The surfactant is e.g. a stearic acid alkali metal salt, glyceryl monostearate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emulsified cosmetic composition for skin which has an excellent feeling in use and has good emulsion stability.

[0002]

BACKGROUND OF THE INVENTION Emulsified cosmetics for the skin have a form in which a dispersed phase of a water component or an oil component is dispersed in a continuous phase, and an oily film is formed on the skin to evaporate water from the skin surface. It has excellent properties such as prevention and retention of water in the keratin. However, on the other hand, since it contains an oil component and a surfactant, it causes stickiness peculiar to them, and particularly when the amount of the oil component is large, it is difficult to obtain an emulsified cosmetic composition having an excellent feeling of use with little stickiness. Therefore, conventionally, an oil component having a relatively low stickiness is selectively blended, or JP-A-6-157 is used.
As disclosed in JP-A-240, a technique has been reported in which a water-soluble thickener and an oil-soluble thickener are combined with a solid oil component and a semi-solid oil component to suppress stickiness thereof. However, even in these cases, when the amount of the oil component is large, the stickiness cannot be sufficiently suppressed, and the feeling of use is not satisfactory.

[0003]

Therefore, it is an object of the present invention to effectively suppress the stickiness of an emulsion cosmetic for skin having a large amount of oil component and to impart an excellent feeling of use.

[0004]

In view of such circumstances, the present inventor has made earnest studies as a result of obtaining an emulsified cosmetic composition for skin which is not sticky and has an excellent feeling of use. Alkylated vinylpyrrolidone), an oil component, and at least one or more surfactants selected from anionic surfactants and nonionic surfactants are combined to suppress stickiness even in emulsion cosmetics for skin with a large amount of oil components. It was found that an excellent usability can be imparted, and the present invention has been completed.

The poly (alkylated vinylpyrrolidone) used in the present invention has the formula (1):

[0006]

[Chemical 2]

[In the formula, at least one of R ₁ , R ₂ , R ₃ and R ₄ is an alkyl group or an alkenyl group having 1 to 20 carbon atoms, and the rest are hydrogen atoms. ] As a polymerized unit, for example, poly (butylated vinylpyrrolidone), poly (octanylated vinylpyrrolidone), poly (dodecynylated vinylpyrrolidone), poly (hexadecenylated vinylpyrrolidone), poly (eicosenylated vinylpyrrolidone), etc. Poly (hexadecenylated vinylpyrrolidone) is particularly preferable. The average molecular weight of these poly (alkylated vinylpyrrolidones) is 5000 to 1
8000, Antalon V-216, Antalon V
-516, Antalon V-220, Antalon V-90
4 (manufactured by ISP) and the like, and one or more of them can be blended. The blending amount is 0.1 to 20% by weight, and particularly preferably 0.5 to 10% by weight, based on the total amount of the composition. If the blending amount is less than 0.1% by weight, the stickiness suppressing effect is insufficient, and if the blending amount exceeds 20% by weight, the emulsion stability is impaired.

The oil component used in the present invention is not particularly limited, and a known component which is usually blended in cosmetics is used. Hydrocarbons such as liquid paraffin, paraffin, petrolatum, white petrolatum, ceresin, microcrystalline wax and squalane: higher fatty acids such as oleic acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid: cetyl alcohol, stearyl alcohol Higher alcohols such as isostearyl alcohol and behenyl alcohol: cetyl myristate, isopropyl myristate, 2-octyldodecyl myristate, cetyl 2-ethylhexanoate, myristyl myristate, isopropyl palmitate, tri (capryl-capric acid) glycerin, Ester oil such as neopentyl glycol dioctanoate: Silicon oil such as methyl polysiloxane: Olive oil, macadamia nut oil,
Examples include almond oil, jojoba oil, avocado oil, castor oil, evening primrose oil, safflower oil, sesame oil, soybean oil, camellia oil, persic oil, mink oil, egg yolk oil, beeswax, salix beeswax, lanolin and other animal and vegetable oils. .

Among them, liquid paraffin, squalane, oleic acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, cetyl alcohol, behenyl alcohol, cetyl myristate, isopropyl palmitate, cetyl 2-ethylhexanoate, tri (capryl). Capric acid) glycerin, neopentyl glycol dioctanoate, methylpolysiloxane, olive oil, safflower oil, mink oil, beeswax, salami beeswax, lanolin are preferable, and liquid paraffin, squalane, olive oil, neopentyl glycol dioctanoate, 2- Cetyl ethylhexanoate is preferred.

In the present invention, one or two of these oil components are used.
One or more kinds can be arbitrarily blended, and the blending amount is 3 to 70% by weight, preferably 5 to 50% by weight, particularly preferably 30 to 50% by weight, based on the total amount of the emulsified cosmetic. If the blending amount is less than 3% by weight, the stickiness that impairs the feeling of use does not occur, and if it exceeds 70% by weight, the stickiness cannot be suppressed.

The anionic surfactant used in the present invention is an alkali metal salt of a higher fatty acid such as potassium laurate, potassium myristate, sodium stearate, potassium stearate, triethanolamine stearate, sodium oleate, and diethanolamine isostearate. Alternatively, a higher fatty acid salt which is an alkanolamine salt: N-myristoyl-L-sodium glutamate,
Alkyl metal salts or alkanolamine salts of acylglutamic acid such as sodium N-acyl-L-glutamate and triethanolamine N-lauroyl-L-glutamic acid, ammonium salts of alkyloxyylsarcosine such as ammonium lauroylsarcosine, alkali metal salts or alkylol Amine salt, sodium stearoyl lactylate, sodium polyoxyethylene lauryl ether sulfate, sodium polyoxyethylene stearyl ether phosphate, sodium polyoxyethylene cetyl ether phosphate, dioctyl sodium sulfosuccinate,
Examples include cetyl phosphate diethanolamine and the like. The addition mole number of these ethylene oxides is preferably 1-10.

Among these anionic surfactants, higher fatty acid salts are preferable, and alkali metal stearate is particularly preferable. The higher fatty acid salt may be formed in the production process from a higher fatty acid and a neutralizing agent such as sodium hydroxide, potassium hydroxide or triethanolamine.

The nonionic surfactants include, for example, sorbitan monolaurate, sorbitan monostearate,
Higher fatty acid sorbitan esters such as sorbitan sesquistearate, sorbitan sesquioleate, and sorbitan monoisostearate: polyoxyethylene (20EO) sorbitan monopalmitate, polyoxyethylene (6EO) sorbitan monooleate, polyoxyethylene monooleate ( 20EO) sorbitan, polyoxyethylene (20EO) sorbitan monolaurate, polyoxyethylene (20EO) sorbitan trioleate, polyoxyethylene (6EO) sorbitan monostearate, polyoxyethylene monostearate (20)
EO) polyoxyethylene such as sorbitan (5-60
EO) higher fatty acid sorbitan ester:

Polyglycerin fatty acid esters such as tetraglyceryl stearate, decaglyceryl isostearate, decaglyceryl tristearate, hexaglyceryl pentaoleate, decaglyceryl stearate: glyceryl monomyristate, glyceryl monostearate, glyceryl monostearate. , Higher fatty acid glycerin esters such as polyoxyethylene (5EO) glyceryl monostearate and polyoxyethylene (15EO) glyceryl monostearate:

Polyoxyethylene (9EO) lauryl ether, polyoxyethylene (21EO) lauryl ether, polyoxyethylene (25EO) lauryl ether, polyoxyethylene (7EO) cetyl ether, polyoxyethylene (15EO) cetyl ether,
Polyoxyethylene (30EO) cetyl ether, polyoxyethylene (40EO) cetyl ether, polyoxyethylene (10EO) oleyl ether, polyoxyethylene (15EO) oleyl ether, polyoxyethylene (20EO) oleyl ether, polyoxyethylene (50EO) ) Ethylene oxide (5-60EO) of higher alcohols such as oleyl ether, polyoxyethylene (5EO) behenyl ether, polyoxyethylene (10EO) behenyl ether, polyoxyethylene (20EO) behenyl ether, and polyoxyethylene (30EO) behenyl ether ) Adducts: polyoxyethylene (10) polyoxypropylene (4) cetyl ether, polyoxyethylene (20) polyoxypropylene (4) cetyl ace Le, polyoxyethylene (1) polyoxypropylene (8) cetyl ether, polyoxyethylene (20) polyoxypropylene (8)
Ethylene oxide (1-60EO) / propylene oxide (1-60EO) adducts of higher alcohols such as cetyl ether and polyoxyethylene (1) polyoxypropylene (4) cetyl ether, polyoxyethylene (5-60EO) cured castor Oil etc. are mentioned.

Among them, sorbitan monoisostearate,
Polyoxyethylene monolaurate (15-25EO)
Sorbitan, polyoxyethylene monooleate (15
~ 25EO) sorbitan, polyoxyethylene monostearate (15-25EO) sorbitan, glyceryl monostearate, polyoxyethylene monostearate (15-25EO) glyceryl, polyoxyethylene (15-25EO) lauryl ether, polyoxyethylene (15-25EO) cetyl ether, polyoxyethylene (15-25EO) oleyl ether, polyoxyethylene (15-25EO) behenyl ether, tetraglyceryl stearate, decaglyceryl isostearate, decaglyceryl tristearate, decaglyceryl stearate. Glyceryl monostearate and polyoxyethylene monostearate (1
5-25 EO) sorbitan is preferred.

These anionic surfactants or nonionic surfactants can be used alone or in admixture of two or more, and the amount is 0.5 to 20% by weight, particularly preferably 1 to 10% by weight. If the blending amount is less than 0.5% by weight, the emulsion stability is poor, and if the blending amount is more than 20% by weight, the spread becomes worse, which is not preferable.

The emulsified cosmetic composition for skin of the present invention may be either a water-in-oil type or an oil-in-water type, but the oil-in-water type is preferred because it exhibits an effect of suppressing stickiness. The skin emulsion cosmetic of the present invention can be produced by a conventional method,
It can be used as a milky lotion, cream, pack, foundation, body cosmetics, etc.
In addition to the essential ingredients, other ingredients usually used in cosmetics, for example, wetting agents, pigments, ultraviolet absorbers, antioxidants, preservatives, fragrances, dyes and the like can be appropriately added.

[0019]

The present invention will be described in more detail with reference to the following examples. The present invention is not limited to these examples, and "%" means "% by weight" unless otherwise specified.
Indicates. Examples 1 to 6 of oil-in-water type cream shown in Table 1
(And Comparative Examples 1 to 5) were manufactured by a conventional method and evaluated.
The evaluation method is shown.

(Evaluation method) 1. Feeling of Use (1) Sticky Feeling A female panel of 10 people performed sensory evaluation and evaluated according to the following evaluation criteria. Evaluation Criteria ◯: Not sticky △: Slightly sticky ×: Sticky (2) Elongation Evaluation was performed in the same manner as the evaluation of stickiness and evaluated according to the following criteria. Evaluation Criteria ○: Good spread △: Slightly bad X: Slow spread 2. Stability Immediately after the production, it was placed under the condition of 40 ° C. and visually observed after 30 days. The judgment criteria are as follows. ◯: Separation is not recognized Δ: Slight separation is recognized ×: Separation is recognized

[0021]

[Table 1]

From the results shown in Table 1, it was confirmed that all the Examples were creams having a good feeling in use and excellent emulsion stability as compared with the Comparative Examples.

Example 7 (Emulsion) Ingredients Amount (%) Glycerin 3.0 Carboxyvinyl polymer 0.2 Paraben 0.3 Triethanolamine Appropriate amount (pH 7) Purified water Balance Cetanol 0.9 Stearic acid 1.2 Monostearin Glycerin acid 1.4 Polyoxyethylene sorbitan monostearate (20EO) 0.8 Squalane 2.0 Olive oil 5.0 Poly (hexadecenyl vinylpyrrolidone) 0.1 Perfume 0.2 Total 100.0

Example 8 (Cream mask) Ingredient content (%) Paraben 0.3 Glycerin 8.0 Purified water balance Triethanolamine Appropriate amount (pH 7) Glycerin monostearate 3.0 Polyoxyethylene sorbitan monostearate (20E) .O.) 2.0 Stearic acid 5.0 Liquid paraffin 7.0 Poly (hexadecenyl vinylpyrrolidone) 10.0 Perfume 0.2 Total 100.0

Example 9 (Cream) Ingredient (%) Paraffin 10.0 Liquid paraffin 40.0 Beeswax 5.0 Vaseline 15.0 Sorbitan sesquioleate 4.0 Polyoxyethylene sorbitan monooleate (20E.O) .) 1.0 Poly (eicosenylated vinylpyrrolidone) 10.0 Perfume 0.4 Purified water balance Paraben 0.3 Total 100.0

[0026] Examples 7 and 8 are oil-in-water type emulsion cosmetics having a good feeling in use and excellent in emulsion stability, and they could be used as emulsions or packs, respectively. In addition, Example 9 was also a water-in-oil type emulsion cosmetic having a good feeling in use and emulsion stability, and could be used in a cream.

[0027]

According to the present invention, poly (alkylated vinylpyrrolidone) 0.1 to 20% by weight, oil component 3 to 70% by weight, and at least one selected from anionic surfactants and nonionic surfactants. It is possible to provide an emulsified cosmetic composition containing the above surfactants, which has a good feeling in use and is excellent in emulsion stability.

Claims (1)

[Claims] 1. Formula (1): [In the formula, at least one of R ₁ , R ₂ , R ₃ and R ₄ is an alkyl group or an alkenyl group having 1 to 20 carbon atoms, and the rest are hydrogen atoms. 0.1% to 20% by weight of poly (alkylated vinylpyrrolidone) as a polymerized unit, 3% to 70% by weight of oil component, and at least one or more kinds of interfaces selected from anionic surfactants and nonionic surfactants. An emulsified cosmetic composition for skin, comprising 0.5% to 20% of an active agent.