JP6487635B2 - Liquid oil composition - Google Patents

Description

  The present invention relates to a liquid oil composition.

Oil preparations keep skin smooth and have excellent moisturizing effects, so that they are used not only for skin, but also for hair, cleansing, etc.
As a moisturizing care agent, an oil preparation containing hydrocarbon oily components such as squalane and liquid paraffin has been proposed (Patent Documents 1 to 3). These oil preparations are said to cover the skin surface with oil and to control the transpiration of moisture from the skin to exert the effect of softening the skin and the moisturizing effect. In these oil preparations, jojoba oil derived from plants and excellent in safety is frequently used.

  On the other hand, an oil formulation that prevents freezing has also been proposed (Patent Document 4). In this oil preparation, a solvent for preventing freezing is used, the feeling of use is light, and the function of covering the original skin surface of the oil preparation is reduced.

Japanese Patent Laid-Open No. 10-130131 JP 2003-96304 A JP 2009-46468 A JP 2012-171880 A

Since jojoba oil used in the oil preparations and the like described in Patent Documents 1 to 3 has a property of freezing at low temperatures, such oil preparations often freeze in winter and the oil preparations. Must be melted before use.
In addition, in order to cover the skin surface and suppress the transpiration of moisture, heavy oil (solid oily component) is excellent. However, in the oil preparation of Patent Document 4 containing a solvent, crystals at a low temperature are used. Its use has been difficult due to stability problems such as precipitation and familiarity with the skin.
The present invention relates to a liquid oil composition having excellent stability, an excellent function of covering the skin, and excellent usability such as smoothness.

  When the present inventors use sterols, specific higher fatty acids, ester oils and / or ether oils, hydrocarbon oils, silicone oils, and higher alcohols in a specific ratio, a liquid oil composition that solves the above-mentioned problems. It was found that can be obtained.

The present invention includes the following components (A), (B), (C), (D), (E) and (F):
(A) Sterols 0.01-1% by mass,
(B) 0.1 to 10% by mass of a higher fatty acid having 12 to 24 carbon atoms which is liquid at 20 ° C.
(C) Ester oil and / or ether oil 0.5-50 mass%,
(D) 8 to 80% by mass of hydrocarbon oil,
(E) 5 to 80% by mass of a silicone oil having a viscosity at 25 ° C. of 20 mPa · s or less,
(F) 1 to 15% by mass of a higher alcohol having 12 to 24 carbon atoms
The present invention relates to a liquid oil composition containing

  The liquid oil composition of the present invention has good storage stability, particularly storage stability at low temperatures, is well-familiar with the skin, is smooth, has excellent persistence on the skin, gives a moist feeling, and has a moisturizing effect. It has excellent sustainability.

(A) Sterols:
The sterols of component (A) used in the present invention may be any substance having a sterol skeleton and derivatives thereof, such as cholesterol, cholesteryl isostearate, provitamin D3, camsterol, stegmasteranol, and stegmasterol. , 5-dihydrocholesterol, α-spinasterol, parisosterol, cryonasterol, γ-sitosterol, stigmasterenol, salgasterol, apesterol, ergostanol, sitosterol, corvisterol, chondrasterol, polyferasterol, halicrona Sterol, neosbongosterol, fucosterol, aptostanol, ergostadienol, ergosterol, 22-dihydroergosterol, brush caster , 24-methylenecholesterol, 5-dihydroergosterol, dehydroergosterol, fungisterol, cholestanol, coprostanol, dimosterol, 7-hetcholesterol, latosterol, 22-dehydrocholesterol, β-sitosterol, cholestatriene -3β-ol, coprostanol, cholestanol, ergosterol, 7-dehydrocholesterol, 24-dehydrocholestanenone-3β-ol, echilenin, echrin, estrone, 17β-estradiol, androst-4-en-3β, 17β -Diol, dehydro shrimp androsterone, alkenyl succinate cholesterol and the like.
As the alkenyl succinic acid cholesterol, those described in JP-A-5-294899 are preferable, and specifically, a sterin derivative represented by the following general formula (1) is preferable.

[Wherein R ¹ represents a residue remaining after removal of a hydrogen atom of a hydroxyl group of cholesterol having one hydroxyl group or a hydrogenated product thereof (hereinafter referred to as sterins).

(R ³ represents a straight-chain or branched alkenyl group having 6 to 20 carbon atoms).
M: hydrogen atom, alkali metal, alkaline earth metal, ammonium, alkanol ammonium having 2 to 9 carbon atoms, alkyl ammonium or alkenyl ammonium having 1 to 22 carbon atoms, alkyl group or alkenyl group having 1 to 18 carbon atoms A substituted pyridinium or basic amino acid is shown. ]

  Of these, cholesterol, cholesteryl isostearate, provitamin D3, sitosterol, cholesterol alkenyl succinate are preferred from the viewpoint of improving the persistence of the liquid oil composition on the skin, and cholesterol, cholesteryl isostearate, cholesterol alkenyl succinate are preferred. More preferably, the alkenyl succinate cholesterol is preferably a sterine derivative represented by the general formula (1).

  Component (A) can be used alone or in combination of two or more thereof, and its content is 0.01% by mass in the total composition from the viewpoint of improving the persistence of the liquid oil composition on the skin. It is above, 0.02 mass% or more is preferable, 0.05 mass% or more is more preferable, 1 mass% or less is preferable, 0.8 mass% or less is preferable, and 0.5 mass% or less is more preferable. Moreover, content of a component (A) is 0.01-1 mass% in the whole composition, 0.02-0.8 mass% is preferable, and 0.05-0.5 mass% is more preferable.

(B) A higher fatty acid having 12 to 24 carbon atoms which is liquid at 20 ° C .:
The component (B) used in the present invention is a higher fatty acid having 12 to 24 carbon atoms that is liquid at 20 ° C. and has a linear or branched saturated or unsaturated hydrocarbon group. In the present invention, “liquid at 20 ° C.” is determined as liquid according to the solid-liquid determination standard defined in ASTM standard ASTM D4359-90.
Examples of the higher fatty acid of component (B) include unsaturated fatty acids having 12 to 24 carbon atoms and branched fatty acids, such as oleic acid, palmitoleic acid, linoleic acid, linolenic acid, isostearic acid, and isopalmitic acid. . In addition, branched fatty acids extracted from vegetable oils such as soybean oil and cottonseed oil or hardened oils, branched fatty acids generated as by-products in the production of dimer acids using vegetable oils as raw materials, and the like can also be used.

  As the component (B), oleic acid, linoleic acid, linolenic acid, isostearic acid, and isopalmitic acid are preferable, and oleic acid and isostearic acid are more preferable from the viewpoint of improving the moisture retention of the liquid oil composition.

  Component (B) can be used alone or in combination of two or more thereof, and its content is 0.1% by mass or more in the total composition from the viewpoint of improving the moisture retention of the liquid oil composition, 0.2 mass% or more is preferable, 0.5 mass% or more is more preferable, it is 10 mass% or less, 8 mass% or less is preferable, and 5 mass% or less is more preferable. Moreover, content of a component (B) is 0.1-10 mass% in the whole composition, 0.2-8 mass% is preferable, and 0.5-5 mass% is more preferable.

  In the present invention, the mass ratio (A) / (B) of the component (A) to the component (B) is 0.001 or more from the viewpoint of improving the moisture retention and the persistence on the skin of the liquid oil composition. Preferably, 0.005 or more is more preferable, 0.008 or more is more preferable, 0.01 or more is more preferable, 1 or less is preferable, 0.8 or less is more preferable, 0.6 or less is further preferable, 0.4 or less is even more preferable. The mass ratio of component (A) to component (B) is preferably (A) / (B) = 0.001 to 1, more preferably 0.005 to 0.8, and 0.008 to 0.6. Is more preferable, and 0.01 to 0.4 is still more preferable.

(C) Ester oil and / or ether oil:
Among component (C), as ester oil, it is a C8-28 linear or branched saturated or unsaturated fatty acid and a C2-28 linear or branched saturated or unsaturated alcohol. And ester oils such as isononyl isononanoate, isotridecyl isononanoate, isopropyl myristate, myristyl myristate, octyldodecyl myristate, isopropyl palmitate, isopropyl isostearate, butyl stearate, neopentyl glycol dicaprate, tri ( 2-ethylhexanoic acid) glycerin, tri (caprylic acid / capric acid) glycerin, tricaproin, 2-ethylhexanoic acid cetyl, 2-ethylhexanoic acid pentaerythrityl, adipic acid diisobutyl, adipic acid 2-hexyldecyl, adipic acid di − -Heptyl undecyl, isostearyl isostearate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, neopentyl glycol di-2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate, tetra-2- Pentaerythritol ethylhexanoate, cetyl octanoate, oleyl oleate, octyldodecyl oleate, decyl oleate, 2-ethylhexyl succinate, isocetyl stearate, butyl stearate, diisopropyl sebacate, cetyl lactate, tetradecyl lactate, palmitic acid 2 -Ethylhexyl, 2-hexyldecyl palmitate, 2-heptylundecyl palmitate, cholesteryl 12-hydroxystearate, phytosteryl oleate, diacid malate Sostearyl, paramethoxycinnamate, pentaerythritol tetrarosinate, N-lauroyl-L-glutamate di (phytosteryl 2-octyldodecyl), N-lauroyl-L-glutamate di (phytosteryl behenyl 2-octyldodecyl) Etc., and these may be naturally derived.

Among these, from the viewpoint of improving the smooth feeling of the liquid oil composition, isononyl isononanoate, isotridecyl isononanoate, isopropyl myristate, isopropyl palmitate, isopropyl isostearate, neopentyl glycol dicaprate, isononyl isononanoate, myristine isononanoate Isopropyl acid, isopropyl palmitate, and neopentyl glycol dicaprate are more preferable.

Among the components (C), the ether oil is preferably an ether having a linear or branched saturated or unsaturated hydrocarbon group having 8 to 28 carbon atoms, such as alkyl-1,3-dimethylbutyl ether. , Dicaprylyl ether, dicapryl ether, dilauryl ether, diisostearyl ether, dioctyl ether, nonylphenyl ether, dodecyl dimethyl butyl ether, cetyl dimethyl butyl ether, and the like.
As the ether oil, from the viewpoint of improving the smooth feeling of the liquid oil composition, the general formula (2):
R ¹¹ —O—R ¹² (2)
(In the formula, R ¹¹ and R ¹² are the same or different and represent a linear, branched or cyclic alkyl group having 4 to 24 carbon atoms, and at least one of R ¹¹ and R ¹² is branched at two or more positions. And the total carbon number of R ¹¹ and R ¹² is 16 to 32)
It is more preferable that the dialkyl ether represented by these is included.

Among the compounds represented by R ¹¹ and R ¹² , examples of the linear alkyl group having 4 to 24 carbon atoms include a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, Undecyl group, dodecyl group, tridecyl group, tetradecyl group, pentadecyl group, hexadecyl group, heptadecyl group, octadecyl group, nonadecyl group, eicosyl group, behenyl group, docosyl group, tricosyl group, tetracosyl group, etc., liquid oil composition From the viewpoint of improving smoothness, a hexyl group, an octyl group, a decyl group, a hexadecyl group, and an octadecyl group are preferable, and a hexadecyl group is more preferable. Examples of branched alkyl groups having 4 to 24 carbon atoms that are branched at one position include, for example, 1-methylpropyl group, 2-methylpropyl group, t-butyl group, 1,1-dimethyl group. Propyl group, 3-methylhexyl group, 5-methylhexyl group, 1-ethylhexyl group, 2-ethylhexyl group, 1-butylpentyl group, 5-methyloctyl group, 2-butyloctyl group, isotridecyl group, 2-pentylnonyl Group, 2-hexyldecyl group, emery type isostearyl group, 2-heptylundecyl group, 2-octyldodecyl group and the like. From the same viewpoint, 1,1-dimethylpropyl group, 2-ethylhexyl group, isotridecyl Group and 2-octyldodecyl group are preferred. Examples of branched alkyl groups having 4 to 24 carbon atoms that are branched at 2 or more positions include, for example, 1,3-dimethylbutyl group, 1- (1-methylethyl) -2-methylpropyl group, 1,1,3,3-tetramethylbutyl group, 3,5,5-trimethylhexyl group, 1- (2-methylpropyl) -3-methylbutyl group, 3,7-dimethyloctyl group, 2- (1, 3,3-trimethylbutyl) -5,7,7-trimethyloctyl group and the like, and 1,3-dimethylbutyl group is preferable from the same viewpoint. Furthermore, examples of the cyclic alkyl group include a cyclohexyl group, a 3-methylcyclohexyl group, and a 3,3,5-trimethylcyclohexyl group. From the same viewpoint, a cyclohexyl group is preferable.

  The component (C) preferably includes a dialkyl ether represented by the general formula (2), more preferably alkyl-1,3-dimethylbutyl ether, from the viewpoint of improving the smoothness of the liquid oil composition. More preferred is -1,3-dimethylbutyl ether.

  Component (C) can be used singly or in combination of two or more of ester oil and ether oil, and the content thereof is from 0 to 0.4 in the whole composition from the viewpoint of improving the smooth feeling of the liquid oil composition. 5 mass% or more, preferably 1 mass% or more, more preferably 5 mass% or more, 50 mass% or less, preferably 40 mass% or less, more preferably 30 mass% or less. Moreover, content of a component (C) is 0.5-50 mass% in the whole composition, 1-40 mass% is preferable, and 5-30 mass% is more preferable.

(D) Hydrocarbon oil:
The hydrocarbon oil of component (D) may be either a linear or branched hydrocarbon oil, and examples thereof include liquid paraffin, light isoparaffin, liquid isoparaffin, isododecane, polybutene, squalane and squalene.
Among these, liquid paraffin, liquid isoparaffin, isododecane, and squalane are preferable, and liquid paraffin, isododecane, and squalane are more preferable from the viewpoint of improving the smooth feeling of the liquid oil composition.

  Component (D) can be used alone or in combination of two or more thereof, and the content thereof is 8% by mass or more in the total composition from the viewpoint of improving the smooth feeling of the liquid oil composition. % By mass or more is preferred, 15% by mass or more is more preferred, 80% by mass or less, 75% by mass or less is preferred, and 70% by mass or less is more preferred. Moreover, content of a component (D) is 8-80 mass% in the whole composition, 10-75 mass% is preferable and 15-70 mass% is more preferable.

(E) Silicone oil having a viscosity at 25 ° C. of 20 mPa · s or less:
The silicone oil as component (E) has a viscosity at 25 ° C. of 20 mPa · s or less.
In the present invention, the viscosity is measured with a B-type viscometer TVB-10 (rotor No. 1, 12 rotations) (manufactured by Toki Sangyo Co., Ltd.).

Examples of the component (E) silicone oil include methylpolysiloxane, decamethyltetrasiloxane, octamethyltrisiloxane, trisiloxane, and the like having a viscosity of 20 mPa · s or less at 25 ° C.
Of these, methylpolysiloxane, decamethyltetrasiloxane, and octamethyltrisiloxane having a viscosity at 25 ° C. of 20 mPa · s or less are preferable from the viewpoint of improving the smoothness of the liquid oil composition, and methylpolysiloxane is preferred. Is more preferable.

  Component (E) can be used alone or in combination of two or more thereof, and the content thereof is 5% by mass or more in the total composition from the viewpoint of improving the smooth feeling and moisture retention of the liquid oil composition. Yes, 8% by mass or more, preferably 10% by mass or more, more preferably 15% by mass or more, 80% by mass or less, 75% by mass or less, more preferably 70% by mass or less, 65% by mass % Or less is even more preferable. Moreover, content of a component (E) is 5-80 mass% in the whole composition, 8-75 mass% is preferable, 10-70 mass% is more preferable, 15-65 mass% is still more preferable.

(F) Higher alcohol having 12 to 24 carbon atoms:
The higher alcohol of component (F) used in the present invention has 12 to 24 carbon atoms, and preferably 14 to 22 carbon atoms.
Examples of the component (F) include lauryl alcohol, myristyl alcohol, cetanol, hexyl decanol, stearyl alcohol, isostearyl alcohol, linolenyl alcohol, oleyl alcohol, arachidyl alcohol, octyldodecanol, behenyl alcohol, lignoceryl alcohol and the like. It is done.

  Of these, cetanol, stearyl alcohol, isostearyl alcohol, octyldodecanol, and behenyl alcohol are preferred from the viewpoint of improving the low temperature stability of the liquid oil composition and the persistence to the skin, cetanol, stearyl alcohol, isostearyl alcohol, Octyldodecanol is more preferred.

  Component (F) can be used alone or in combination of two or more thereof, and its content is 1 in the total composition from the viewpoint of improving the low temperature stability of the liquid oil composition and its persistence to the skin. % By mass or more, preferably 2% by mass or more, more preferably 5% by mass or more, 15% by mass or less, preferably 12% by mass or less, and more preferably 10% by mass or less. Moreover, content of a component (F) is 1-15 mass% in the whole composition, 2-12 mass% is preferable, and 5-10 mass% is more preferable.

  In the present invention, the mass ratio [(C) + (F)] of the total amount [(C) + (F)] of the components (C) and (F) to the total amount [(D) + (E)] of the components (D) and (E) [( C) + (F)] / [(D) + (E)] is preferably 0.1 or more, more preferably 0.15 or more, from the viewpoint of improving the moisture retention and the persistence to the skin of the liquid oil composition. More preferably, 0.18 or more is more preferable, 0.19 or more is more preferable, 0.2 or more is further preferable, 1.5 or less is preferable, 1 or less is more preferable, 0.7 or less is more preferable, 0 .4 or less is more preferable, and 0.3 or less is more preferable. The mass ratio of the total amount [(C) + (F)] of the components (C) and (F) to the total amount [(D) + (E)] of the components (D) and (E) is [( C) + (F)] / [(D) + (E)] = 0.1 to 1.5 is preferable, 0.15 to 1 is more preferable, 0.18 to 0.7 is further preferable, and 19-0.4 is still more preferable, and 0.2-0.3 is further more preferable.

In the liquid oil composition of the present invention, the water content is preferably 1% by mass or less, more preferably 0.5% by mass or less, and 0% by mass from the viewpoint of obtaining a uniform and good appearance composition. 0.1% by mass or less is more preferable, 0.05% by mass or less is more preferable, 0.01% by mass or less is further preferable, and substantially 0 is more preferable.
In addition, the liquid oil composition of the present invention can contain a surfactant, but from the viewpoint of obtaining a uniform and good-looking composition, the content of surfactants other than the above components is in the total composition. 3 mass% or less is preferable, 2 mass% or less is more preferable, 1 mass% or less is more preferable, 0.1 mass% or less is further more preferable, 0.01 mass% or less is further more preferable, and it is substantially 0. Is even more preferable.

The liquid oil composition of the present invention is suitable as a cosmetic, more suitable as a skin cosmetic, and as a skin cosmetic that further enhances the moisturizing effect.
When the liquid oil composition of the present invention is used as a cosmetic, it is further used in components for ordinary cosmetics, for example, other oil components, moisturizers, thickeners, bactericides, wetting agents, colorants, antiseptics. Agents, feel improvers, powders, fragrances, anti-inflammatory agents, whitening agents, antiperspirants, UV absorbers other than the oily components, antioxidants, and the like can be appropriately contained.

The liquid oil composition of this invention can be manufactured by mixing a compounding component by a normal method.
When the liquid oil composition of the present invention is used as a skin cosmetic, it can be used by applying it to any of skin, hair, face, body, limbs and the like.
In addition, when the liquid oil composition of the present invention is used as a skin cosmetic, it can be applied to any of the skin, hair, face, body, limbs, etc., and used without being washed off and / or wiped off. .

Examples 1-12, Comparative Examples 1-6
Liquid oil compositions having the compositions shown in Table 1 were produced and evaluated for low temperature stability, moisture content, persistence and smoothness. The results are also shown in Table 1.
Examples 7 to 12 are reference examples and are not included in the scope of the present invention.

(Production method)
Components (A), (B), (C) and (F) are mixed, stirred at 60 ° C. for 10 minutes, and uniformly mixed. Thereafter, components (D) and (E) were added, and mixed to 30 ° C. while cooling (1 ° C./min) to obtain a liquid oil composition.

(Evaluation method)
(1) Low temperature stability:
Each liquid oil composition was stored at −5 ° C. for 1 month, and then the state when it was returned to room temperature (25 ° C.) was visually evaluated according to the following criteria.
4: No crystals are seen visually and with a microscope.
3; Crystals are not observed visually, but are confirmed with a microscope.
2: The cloudiness is observed visually.
1; Visual crystal precipitation is observed.

(2) Moisturizing property (water content):
The inside of the forearm is washed with soap, and after 10 minutes have passed since the towel was dried, the moisture content of the skin on the inside of the forearm after washing is measured with a corneometer (Courage + Khazaka electronic GmbH). Next, 20 μL / cm ² of each liquid oil composition is applied, and after 6 hours, the same part is measured with a corneometer. The amount of change in Corneo value before and after application was determined. It shows that the water | moisture content transpired from a body is hold | maintained by the liquid oil composition, ie, moisture retention is excellent, so that the variation | change_quantity of a Corneo value is large. This test was conducted in an environment of 20 ° C. and humidity of 40%.

(3) Persistence:
An oil-soluble fluorescent agent (Nile Red) is added to each liquid oil composition to 0.01%. This is applied to pork skin (3 cm × 3 cm) at 20 μL / cm ² and allowed to stand for 1 hour (30 ° C., humidity 40%). Then, it is washed by stirring for 5 minutes in a beaker containing 1 L of distilled water. After towel drying, the surface is washed with 10 mL of ethanol, and the washing solution is collected. The collected solution is concentrated to 1 mL and quantified by high performance liquid chromatography under the following conditions.
Apparatus: Hitachi F-7000 system eluent: acetonitrile / water = 90/10, 40 ° C., 1 mL / min
Detector: Fluorescence (Ex: 540, Em: 640)
Column: ODS-2
The amount of Nile Red in the applied composition and the amount of Nile Red remaining on the surface after the residue evaluation were quantified, and from these results, the ratio of the residual amount to the coating amount was calculated and determined. It shows that it is excellent in the persistence to skin, so that a numerical value is high.

(4) Smooth feeling:
The sense of smoothness when each liquid oil composition was applied to the skin (lower arm) was sensory-evaluated by the following criteria by five specialist panels, and the average value was obtained.
5: Very smooth.
4; It is very smooth.
3; Slightly smooth.
2; lack of smoothness.
1; not smooth.

Formulation Example 1
A liquid oil composition having the following composition was produced.
The resulting liquid oil composition has good storage stability at low temperatures, is well-familiar with the skin, is smooth, has excellent persistence on the skin, gives a moist feeling, and has a long-lasting moisturizing effect. It was a thing.

(Production method)
Cholesterol, cholesteryl isostearate, cetanol, stearyl alcohol, isostearic acid, isononyl isononanoate, isopropyl palmitate and cetyl-1,3-dimethylbutyl ether are mixed, stirred at 60 ° C. for 10 minutes, and mixed uniformly. Thereafter, the remaining components were added and mixed with cooling to 30 ° C. (1 ° C./min) to obtain a liquid oil composition.

<Liquid oil composition>
Cholesterol ^{* 1} 0.01 (mass%)
Cholesteryl isostearate ^{* 2} 0.01
Cetanol ^{* 3} 0.3
Stearyl alcohol ^{* 4} 0.05
Isostearic acid ^{* 5} 1.0
Isononyl isononanoate ^{* 6} 0.5
Isopropyl palmitate ^{* 7} 20.0
Cetyl-1,3-dimethylbutyl ether ^{* 8} 0.50
Liquid paraffin ^{* 9} 40.0
Methylpolysiloxane ^{* 10} 37.52
Evening primrose oil 0.01
Lavender oil 0.01
Jojoba oil 0.01
Perfume 0.08
Total 100.00
* 1) Kairei Marine Cholesterol, manufactured by Nihon Suisan * 2) Exepal IS-CE-A, manufactured by Kao * 3) Cetyl alcohol NX, manufactured by Higher Alcohol Industry * 4) Stearyl alcohol NX, manufactured by Higher Alcohol Industrial * 5) Isostearic acid EX, manufactured by Higher Alcohol Industry * 6) Saracos 99, manufactured by Nisshin Oillio Group * 7) Exepal IPP, manufactured by Kao * 8) ASE166K, manufactured by Kao * 9) High Coal K-350, Kaneda * 10) Silicone KF-96L-2CS, manufactured by Shin-Etsu Chemical Co., Ltd.

Formulation Example 2
A liquid oil composition having the following composition was produced.
The resulting liquid oil composition has good storage stability at low temperatures, is well-familiar with the skin, is smooth, has excellent persistence on the skin, gives a moist feeling, and has a long-lasting moisturizing effect. It was a thing.

(Production method)
Mix neopentyl glycol dicaprate, octyldodecanol, cholesteryl isostearate, cetanol, isostearic acid, isopropyl palmitate, cetyl-1,3-dimethylbutyl ether, isododecane, squalane and l-menthol, and stir at 60 ° C. for 10 minutes. And mix evenly. Thereafter, the remaining components were added and mixed with cooling to 30 ° C. (1 ° C./min) to obtain a liquid oil composition.

<Liquid oil composition>
Neopentyl glycol dicaprate ^{* 11} 1.0 (mass%)
Octyldodecanol ^{* 12} 6.0
Cholesteryl isostearate ^{* 2} 0.1
Cetanol ^{* 3} 0.3
Isostearic acid ^{* 5} 1.0
Isopropyl palmitate ^{* 7} 5.0
Cetyl-1,3-dimethylbutyl ether ^{* 8} 0.5
Isododecane ^{* 13} 20.0
Squalane ^{* 14} 15.5
l-Menthol 0.1
Methyl polysiloxane ^{* 15} 43.5
Ethanol 2.0
Paramethoxycinnamic acid-ethylhexyl 5.0
Total 100.0
* 11) Estemol N-01, Nisshin Oillio Group * 12) Calcoal 200GD, Kao * 13) Marcazole R, Maruzen Petroleum * 14) Nikkor Squalane, Nikko Chemicals * 15) Silicone KF- 96A-10CS, manufactured by Shin-Etsu Chemical Co., Ltd.

Claims (3)

The following components (A), (B), (C), (D), (E) and (F):
(A) Sterols 0.01-1% by mass,
(B) 0.1 to 10% by mass of a higher fatty acid having 12 to 24 carbon atoms which is liquid at 20 ° C.
(C) Ester oil and / or ether oil 0.5-50 mass%,
(D) 8 to 80% by mass of hydrocarbon oil,
(E) 5 to 80% by mass of a silicone oil having a viscosity at 25 ° C. of 20 mPa · s or less,
(F) 1 to 15% by mass of a higher alcohol having 12 to 24 carbon atoms
Containing
The mass ratio of the total amount [(C) + (F)] of the components (C) and (F) to the total amount [(D) + (E)] of the components (D) and (E) is [(C) + (F)] / [(D) + (E)] = 0.18 to 0.4 ,
Weight ratio of component (A) to component (B) is, (A) / (B) = 0.008 ~ liquid oil composition is 0.10. Component (C) is represented by the general formula (1):
R ¹¹ —O—R ¹² (1)
(In the formula, R ¹¹ and R ¹² are the same or different and represent a linear, branched or cyclic alkyl group having 4 to 24 carbon atoms, and at least one of R ¹¹ and R ¹² is branched at two or more positions. And the total carbon number of R ¹¹ and R ¹² is 16 to 32)
The liquid oil composition of Claim 1 containing the dialkyl ether represented by these.   The liquid oil composition according to claim 1 or 2, which is a skin cosmetic.