JPH0620531B2 - Emulsified composition - Google Patents

Description

TECHNICAL FIELD The present invention relates to an emulsion composition in which a lower alcohol is stably mixed at a high concentration.

BACKGROUND ART In the field of cosmetics, lower alcohols have a refreshing and quick-drying sensation on the skin and hair, and also have astringent, cleansing, sterilizing, and drying-promoting effects. In addition, lotions and tonics enhance the solubility of the drug. It is widely used for liquid medicines such as.

Emulsions such as milky lotions and creams are typical dosage forms of basic cosmetics used for the purpose of supplementing the skin and hair with oil components and water, that is, as a substitute for a sebum film.

This emulsifier form is not only for the purpose of moisturizing and softening, but also for promoting blood circulation of the skin depending on the purpose and function,
Skin cleansing, makeup remover (cleansing), makeup base,
It is used as a basic dosage form for UV protection, hair removal, and hair styling.

However, when a lower alcohol is blended in a large amount, the hardness and viscosity of the system are lowered, so that there is a problem in emulsion stability.

Therefore, higher fatty acid 0.1-10.0% by weight, relative to higher fatty acid
An oil-in-water emulsion composition characterized by containing 0.1 to 1-fold amount (molar ratio) of a basic amino acid and 5 to 30% by weight of a lower alcohol has been invented and known (JP-A-60-222).
No. 142).

In the present invention, a lower alcohol is used with a basic amino acid such as arginine, ornithine, lysine, oxylysine, and histidine to stabilize the emulsion composition.

Problems to be Solved by the Invention However, such conventional emulsifiers contain a basic amino acid for the purpose of stabilization, but depending on the type of ion of the base used and the pH of the composition, long-term stability is not achieved. There is a problem that it is missing.

Means for Solving Problems Generally, higher alcohols (C ₁₂ or higher) have high lipophilicity,
It is used as an oily base for cosmetics and as an emulsion stabilization aid.

It also has affinity with lower alcohols such as ethyl alcohol having a hydroxyl group.

However, the solubility in lower alcohols tends to decrease with higher alcohols containing more carbon atoms.

The present inventor pays attention to this property, and an addition compound obtained by adding polyoxyethylene to a higher alcohol having a large lipophilicity, that is, a relatively large number of carbon atoms to make it hydrophilic is a water containing a lower alcohol in an emulsification system. As a result of diligent study, it was considered that the compound exhibits excellent interfacial adsorption force between the liquid phase and the oil phase, and as a result, a polyoxyethylene addition compound of a C22 alkyl alcohol (behenyl alcohol), a lower alcohol and an oil component were contained. It is an invention of an emulsion composition.

Polyoxyethylene is 5 for behenyl alcohol
It is preferable to add 20 to 20 mol. In the present invention, methyl alcohol, ethyl alcohol, propyl alcohol,
Alcohols having 5 or less carbon atoms such as isopropyl alcohol and pentanol, and benzyl alcohol are used as lower alcohols.

The compounding amount is 5 to 40% by weight, preferably 10 to 30% by weight.

The oil components include oils and fats such as olive oil, mink oil, turtle oil, egg yolk oil, coconut oil, and cocoa oil, waxes such as beeswax and lanolin, and single or hydrogen such as liquid paraffin, squalane, and vaseline, and 2-ethylhexene. All kinds of oil components such as esters such as cetyl acid and isotridecyl myristate can be used.

The blending amount is 0.5 to 80% by weight, preferably 5 to 5%.
It is 0% by weight.

The weight ratio of the polyoxyethylene addition compound of alkyl alcohol (behenyl alcohol) and the oil component is
It is preferably 1: 2 to 10: 1.

In the emulsified composition of the present invention, other than the above components, glycerin generally blended as an emulsified composition, propylene glycol, polyhydric alcohol such as 1,3-butylene glycol, thickener, polymer, organic pigment, powder, Organic dyes, antiseptics, bactericides, fragrances, ultraviolet absorbers, vitamins, hormones and other agents, sequestering agents, etc. can be added.

The emulsion composition of the present invention can be used in combination with other surfactants if necessary.

Action In the emulsified composition according to the present invention, the one obtained by adding polyoxyethylene to behenyl alcohol is suitable for imparting appropriate hydrophilicity and lipophilicity to the interface between the aqueous phase component containing the lower alcohol and the oil phase component and adsorbing it well Mix.

Therefore, once emulsified, it remains stable after a lapse of time and maintains the emulsified state.

Examples Hereinafter, the present invention will be described in detail according to specific examples.

Example-1 Hair-growing agent (lotion-like emulsion) Of the bases having the following composition, the oil phase component (including the surfactant) was heated to about 60 ° C. and uniformly dissolved, and then stirred under stirring.
An aqueous phase component heated to 60 ° C. was added to emulsify, and then cooled (30 ° C.) with stirring to prepare a hair restorer.

Mink oil 6.0 wt% Jojoba oil 2.0 wt% POE (5) Behenyl ether 0.5 wt% POE (10) Behenyl ether 1.5 wt% Glycerin 3.0 wt% Capsicum tincture 1.0 wt% Assemblage extract 3.0 wt% Tocopherol acetate 0.1 wt% Ethyl alcohol 25.0% by weight Fragrance, preservative A small amount Purified water Total amount is 100.0% by weight Example-2 Hair styling agent (milky lotion) Of the base material having the following composition, the oil phase component was heated to about 60 ° C and uniformly dissolved. After that, an aqueous phase component heated to about 60 ° C. was added under stirring to emulsify, and then cooled (30 ° C.) with stirring to prepare a hair styling agent.

Olive oil 10.0% by weight Polyalkylene glycol derivative 5.0% by weight (Unilube 10MB-25KB (NOF Corporation)) POE (5) Behenyl ether 3.0% by weight Chitin liquid (Ichimaru Falcos) 5.0% by weight 1,3-butylene glycol 3.0% by weight Ethyl alcohol 30.0% by weight Fragrance, preservative Small amount Purified water Total amount is 100.0% by weight Example-3 Cleansing cream Oil base component of base having the following composition is heated to about 60 ° C. and uniformly dissolved, and then stirred. A water phase component heated to about 60 ° C was added to emulsify the mixture below, followed by cooling with stirring (30 ° C) to prepare a cleansing cream.

Isopropyl palmitate 10.0 wt% Squalane 5.0 wt% Behenyl alcohol 0.2 wt% POE (5) Behenyl ether 2.0 wt% Purified soybean lecithin 1.0 wt% Carboxyvinyl polymer 0.1 wt% Potassium hydroxide 0.01 wt% 3-Methyl-1,3-butane Diol 5.0% by weight Ethyl alcohol 10.0% by weight Fragrance, preservative Suitable amount Purified water Total amount is 100.0% by weight Example-4 Sunscreen (milky lotion) Oil phase component of about 60 ° C After heating and uniformly dissolving, the aqueous phase component heated to about 60 ° C was added under stirring to emulsify, and then cooled (30 ° C) with stirring to prepare a sunscreen agent.

Cetyl 2-ethylhexanoate 5.5 wt% Dimethylpolysiloxane (350CS) 0.5 wt% POE (10) Behenyl ether 1.5 wt% 1,3-Butylene glycol 3.0 wt% Ethyl paraaminobenzoate 3.0 wt% Marronnier extract 1.0 wt% Ethyl alcohol 15.0 wt% Perfume, preservative Small amount Purified water Total amount is 100.0 wt% Example-5 After shave lotion The oil phase component of the base having the following composition is heated to about 60 ° C. and uniformly dissolved, and then stirred. An aqueous phase component heated to about 60 ° C. was added below to emulsify, and then cooled (30 ° C.) with stirring to prepare an aftershave lotion.

Isooctyl isoperargonate 5.0% by weight POE (5) Behenyl ether 1.5% by weight POE (20) Behenyl ether 0.5% by weight Allantoin 0.1% by weight l-Menthol 0.1% by weight Propylene glycol 3.0% by weight Ethyl alcohol 10.0% by weight Perfume, preservatives Small amount Test-1 in which the total amount of purified water was 100.0% by weight The emulsions obtained in Examples-1 to 5 were tested for emulsion stability and suitability for use. The results are shown in Table-1.

Test method (1) The emulsion compositions of Examples 1 to 5 were subjected to a sensory test by 10 testers, and those in which 7 or more out of 10 judged that the feeling of use was good were regarded as good and 4 to 6 Those that were judged to be good were rated as normal, and those with 3 or less people were rated as bad.

Test method (2) The emulsion stability was examined after leaving the product for 1 month at room temperature and 40 ° C.

Test-2 Of the base material having the composition shown in Table 2 below, the oil phase component was heated to about 60 ° C and uniformly dissolved, and then stirred at about 60 ° C.
The heated aqueous phase component was added to emulsify the mixture, and then the mixture was cooled with stirring (30 ° C.) to prepare an emulsified composition. Then, their emulsified states were compared and examined.

Test-3 Of the base material having the composition shown in Table 3 below, the oil phase component was heated to about 60 ° C and uniformly dissolved, and then stirred at about 60 ° C.
The heated aqueous phase component was added to emulsify the mixture, and then the mixture was cooled (30 ° C.) with stirring to prepare four emulsion compositions.

The emulsified state and stability of the prepared emulsion compositions were compared, and the relationship with the carbon number of the alkyl group of polyoxyethylene alkyl ether was examined.

It was found that the higher the number of carbon atoms in the alkyl group, the better the condition and the better the stability.

Test-4 Cleansing cream prepared in Example-3 and commercially available cleansing cream (commercial product a, commercial product b)
And were compared and examined for their cleansing effect.

(Test method) Apply lipstick to the back of your hand in a circle with a diameter of 1 cm, and take 1 g of each cleansing cream and draw a circle with your fingertips.
After rubbing about 10 times, the cleansing cream was washed off with water at 10 ° C.

Then, the redness of the skin before and after cleansing was quantified using a color difference meter (Minolta CR-100).

It turned out that the thing of Example-3 is excellent in the cleansing power compared with a commercial item.

Test-5 The sunscreen prepared in Example-4 and the sunscreen prepared by adding another substance in place of the component polyoxyethylene behenyl ether were prepared, and the emulsified state was compared and examined (Table-5 ).

Test-6 Based on the following formulation, the type of surfactant was changed as shown in Table-6 to prepare an emulsified composition, and the emulsified state and properties immediately after that and the stability after left for 1 month were examined. did.

Cetyl 2-ethylhexanoate 8.0% by weight Surfactant (Table-6) 2.0% by weight Ethyl alcohol 18.0% by weight Purified water 72.0% by weight (Preparation method) The water phase and oil phase are each heated to approximately 60 ° C and water is added. Phase is added to the oil phase and emulsified. After emulsification, cool with stirring and 30 ℃
Finish with and get the product.

(Evaluation) (1) State immediately after emulsification Emulsifiable ◎… Smooth and uniform state ○… Uniform state Δ… Slightly non-uniform state Not emulsifiable ×… Separation or creaming (2) Properties immediately after emulsification L… Lotion state L _M ... slightly a viscosity lotion M ... milky C ... creamy (3) stability conditions: 1 month left reference at room temperature or 40 ° C.: ○ ... is maintained in a stable state △ ... slightly stability decreases Doing ... Separation or creaming Test-7 Based on the following formulation, the type of oil component was changed as shown in Table-7 to prepare an emulsified composition, and the emulsified state and properties immediately after emulsification and the stability after left for 1 month were compared.

Oil component (Table 7) 8.0% by weight POE (5) Behenyl ether 2.0% by weight Ethyl alcohol 18.0% by weight Purified water 72.0% by weight (Preparation method) The water phase and oil phase are heated to approximately 60 ° C, and the water phase Is added to the oil phase to emulsify, and after emulsification, cool with stirring to 30 ° C.
Finish with and get the product.

(Evaluation method) (1) State immediately after emulsification Emulsifiable ◎… Smooth and uniform state ○… Uniform state △… Slightly non-uniform state Not emulsifiable ×… Separation or creaming (2) Properties immediately after emulsification L… Lotion Condition L _M … Lotion with slightly viscosity M… Milk liquid C… Cream (3) Stability condition: Leave at room temperature or 40 ° C for 1 month Criteria: ○… Maintain stable condition △… Slightly stable Decreasing × ... Separation or creaming Effect As described above, the emulsified composition according to the present invention includes the polyoxyethylene adduct of behenyl alcohol added and the lower alcohol to emulsify the oil phase component and the water phase component. It is possible to provide a stable emulsion for a long period of time.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location B01F 17/42 (56) References JP 61-291035 (JP, A) JP 58- 180226 (JP, A) JP 61-42328 (JP, A) JP 62-53728 (JP, A) Japanese Patent Sho 53-45374 (JP, B2) Hirokazu Kameme "Handbook-Cosmetics / Raw Materials -Revised version "(Showa 52-2-1) Nikko Chemicals. Nippon Surfactant Industry P.P. 358-361, P.I. 58 ~ 61

Claims (3)

[Claims] 1. An emulsified composition containing polyoxyethylene (n) behenyl ether, a lower alcohol and an oil component (where n is 5 to 20). 2. Polyoxyethylene (n) behenyl ether is 0.1 to 10% by weight, lower alcohol is 5 to 40% by weight,
The emulsified composition according to claim 1, wherein the oil component is 0.5 to 80% by weight. 3. The emulsified composition according to claim 1, wherein the compounding ratio of the oil component and the polyoxyethylene behenyl ether is 2: 1 to 10: 1.