JP2019001765A - Water-in-oil liquid emulsion composition - Google Patents

Abstract

To provide a water-in-oil liquid emulsion composition that spreads well at the time of application, has no stickiness, and has excellent stability.SOLUTION: A water-in-oil liquid emulsion composition contains following components (a) to (c): (a) cetyl dimethicone copolyol, (b) polyglyceryl diisostearate, and (c) water, where the content of (c) water is 50 mass% or more and 80 mass% or less relative to the water-in-oil liquid emulsion composition.SELECTED DRAWING: None

Description

  The present invention relates to a water-in-oil liquid emulsion composition containing cetyl dimethicone copolyol and polyglyceryl diisostearate.

  Conventionally, water-in-oil emulsion compositions are used in many cosmetics because they are superior in protecting the skin and imparting skin flexibility compared to oil-in-water emulsion compositions. Furthermore, when used over a large area, such as body cosmetics, or in a low-temperature environment such as winter, it is liquid and has a low viscosity from the viewpoint of ease of application. There is a need for a water-in-oil emulsion composition that is easy to spread.

  On the other hand, since the water-in-oil emulsion composition has an oil phase as a continuous phase, it has drawbacks in feeling of use such as “poor elongation at application, heavy touch feeling, stickiness”, etc. There are drawbacks in physical properties such as “poor stability”. Furthermore, when the viscosity is lowered to be liquid, there is a problem that the emulsification stability is deteriorated and the composition is separated, so that the quality as a cosmetic cannot be ensured.

  In order to eliminate these drawbacks, for example, Japanese Patent Application Laid-Open No. 02-258710 improves the feeling of use of a water-in-oil emulsion composition by using a water-in-oil emulsion composition containing a large amount of silicone oil. There is an attempt. However, when a large amount of silicone oil is blended, the skin softening effect may not be sufficiently obtained, and it becomes very difficult to obtain a stable water-in-oil emulsion composition, particularly at high temperatures. May be worse. In addition, silicone emulsifiers are blended to improve usability and stability, but the oil types that can be blended into the oil phase, which is a continuous layer, are limited. Stability below may be worse.

  Here, various studies have been made to improve the stability of the water-in-oil emulsion composition at high temperatures. For example, Patent Document 1 discloses a water-in-oil emulsified cosmetic containing an oily base containing silicone oil, water, a polyether-alkyl-modified silicone, and a dextrin fatty acid ester. Patent Document 2 contains an organically modified clay mineral which is a plate-like particle having an average thickness of 0.1 μm or less and an average major axis of 0.5 to 50 μm, and a polyoxyalkylene / alkyl co-modified branched silicone. A water-in-oil emulsion composition is disclosed.

Japanese Patent Laid-Open No. 04-312512 JP 2012-116757 A

  However, the water-in-oil emulsion compositions disclosed in Patent Document 1 and Patent Document 2 contain dextrin fatty acid esters and organically modified clay minerals, which are oil gelling agents. When blended with a water-type emulsified composition, the viscosity at a low temperature increases, and it may be difficult to spread on the skin and difficult to take out from the container.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a water-in-oil liquid emulsion composition that has good elongation at the time of application, no stickiness, and excellent stability.

  The inventors of the present invention have conducted intensive research in view of the above problems. As a result, the present inventors have found that the above problems can be solved by a water-in-oil liquid emulsion composition containing cetyl dimethicone copolyol and polyglyceryl diisostearate, and have completed the present invention.

(1) The present invention is a water-in-oil liquid emulsion composition,
The following components (a) to (c);
(A) cetyl dimethicone copolyol,
(B) polyglyceryl diisostearate,
(C) water,
Containing,
(C) It is a water-in-oil liquid emulsion composition whose water content is 50 mass% or more and 80 mass% or less with respect to the water-in-oil liquid emulsion composition.
(2) The water-in-oil liquid emulsion composition described in (1) is a ratio (G ″ / G) of loss elastic modulus (G ″) to storage elastic modulus (G ′) in dynamic viscoelasticity measurement. When ') becomes 1, the strain (γ) may be 10% or more and 40% or less, and G ′ and G ″ may be 10 Pa or more and 100 Pa or less, respectively.
(3) The water-in-oil liquid emulsion composition described in (1) or (2) may further contain (d) a hydrocarbon oil and (e) a silicone oil.
(4) In the water-in-oil liquid emulsion composition according to any one of (1) to (3), (b) polyglyceryl diisostearate may be triglyceryl diisostearate.
(5) The water-in-oil liquid emulsion composition according to any one of (1) to (4) has a content of (a) cetyl dimethicone copolyol relative to the water-in-oil liquid emulsion composition. 0.5 mass% or more and 5 mass% or less, and the content of polyglyceryl diisostearate may be 0.5 mass% or more and 5 mass% or less with respect to the water-in-oil liquid emulsion composition.
(6) The water-in-oil liquid emulsion composition according to any one of (1) to (5) has a (d) hydrocarbon oil content of 5 relative to the water-in-oil liquid emulsion composition. The content of (e) silicone oil may be 10% by mass or less based on the water-in-oil liquid emulsion composition.

  The water-in-oil liquid emulsion composition of the present invention contains the following components (a) to (c); (a) cetyl dimethicone copolyol, (b) polyglyceryl diisostearate, (c) water, and (c) The water content is 50% by mass or more and 80% by mass or less with respect to the water-in-oil type liquid emulsion composition. Thus, it is possible to provide a water-in-oil liquid emulsion composition that has good elongation at the time of application, no stickiness, and excellent stability.

  Hereinafter, the present invention will be described in detail, but these are given for illustrative purposes and do not limit the present invention.

[Water-in-oil liquid emulsion composition]
The first aspect of the present invention is a water-in-oil liquid emulsion composition comprising the following components (a) to (c); (a) cetyl dimethicone copolyol, (b) polyglyceryl diisostearate, (c) (C) It is a water-in-oil liquid emulsion composition whose content of water is 50 mass% or more and 80 mass% or less with respect to the water-in-oil liquid emulsion composition.

〔emulsifier〕
The water-in-oil liquid emulsion composition of the present invention contains (a) cetyl dimethicone copolyol. (A) As cetyl dimethicone copolyol (cetyl PEG / PPG-10 / 1 dimethicone), for example, trade name: ABIL EM90, EM180 (manufacturer: Evonik Industries AG), KF-6038 (manufacturer: Shin-Etsu Chemical Co., Ltd.) Etc. can be used.

  The content of (a) cetyl dimethicone copolyol is preferably 0.5% by mass or more and 5% by mass or less, and preferably 1% by mass or more and 3% by mass or less with respect to the water-in-oil liquid emulsion composition. More preferred.

  The water-in-oil liquid emulsion composition of the present invention contains (b) polyglyceryl diisostearate. (B) Examples of the polyglyceryl diisostearate include, for example, trade names: EMALEX DISG-2, DISG-3, DISG-6 (manufacturer: Nippon Emulsion Co., Ltd.), trade names: Risolex PGIS22, PGIS32 (manufacturer: Higher Alcohol Industry Co., Ltd.) ), Cosmol 42V (manufacturer: Nisshin Oilio Group Co., Ltd.) and the like can be used. The polyglyceryl diisostearate is preferably diglyceryl diisostearate or triglyceryl diisostearate, and more preferably triglyceryl diisostearate.

  (B) The content of polyglyceryl diisostearate is preferably 0.5% by mass or more and 5% by mass or less, and more preferably 1% by mass or more and 3% by mass or less with respect to the water-in-oil liquid emulsion composition. preferable.

  By using (a) cetyl dimethicone copolyol and (b) polyglyceryl diisostearate as emulsifiers, it has fluidity even at low temperatures, has excellent stability at high temperatures and long-lasting moisturizing effects, and stretches during application. The water-in-oil type liquid emulsified composition is excellent and has a good feeling of use without stickiness.

  In addition to (a) cetyl dimethicone copolyol and (b) polyglyceryl diisostearate, the water-in-oil liquid emulsion composition of the present invention may use one or more other emulsifiers. When using other emulsifiers, it is preferably a sorbitan fatty acid ester, and more preferably polyoxyethylene is added to the sorbitan fatty acid ester. Examples of sorbitan fatty acid esters include sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquistearate, sorbitan tristearate, sorbitan monooleate, sorbitan sesquioleate, sorbitan trioleate, sorbitan monoisostearate, Sorbitan fatty acid esters such as sorbitan sesquiisostearate and coconut oil fatty acid sorbitan can be used. Examples of polyoxyethylene added to sorbitan fatty acid esters include mono coconut oil fatty acid polyoxyethylene sorbitan, polyoxyethylene sorbitan monopalmitate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan tristearate, monoolein Polyoxyethylene sorbitan fatty acid esters such as polyoxyethylene sorbitan acid, polyoxyethylene sorbitan trioleate, and polyoxyethylene sorbitan monoisostearate can be used. These emulsifiers can be used as other emulsifiers, but polyoxyethylene sorbitan tristearate is more preferable from the viewpoints of stability at high temperatures and fluidity at low temperatures. As the polyoxyethylene sorbitan tristearate, for example, trade name: NIKKOL TS-30L (manufacturer: Nikko Chemicals Co., Ltd.) Nonion ST-521 (manufacturer: NOF Corporation) and the like can be used.

  The content of one or more other emulsifiers is preferably 0% by mass or more and 1% by mass or less with respect to the water-in-oil liquid emulsion composition.

(Water phase component)
The water-in-oil liquid emulsion composition of the present invention contains (c) water, and (c) the water content is 50% by mass or more and 80% by mass or less based on the water-in-oil emulsion liquid composition. 55 mass% or more and 75 mass% or less is preferable. Thereby, it can be set as the water-in-oil-type liquid emulsion composition which is favorable at the time of application | coating and does not have stickiness.

  The water-in-oil liquid emulsion composition of the present invention may contain other aqueous components in addition to (c) water. For example, you may contain low carbon number alcohol, diol, a polyol, or those ether. For example, polyols such as ethanol, isopropanol, 1,2-propanediol, propylene glycol, glycerin, ethylene glycol, butylene glycol, polyglycerin, polyethylene glycol, polypropylene glycol, sorbitol, saccharides such as glucose, maltose, trehalose, sucrose, etc. Can be used. Among these, polyols and saccharides are preferably used, and glycerin, trehalose, and the like can be used more suitably.

(Oil phase component)
The water-in-oil liquid emulsion composition of the present invention preferably contains (d) a hydrocarbon oil that is usually used in cosmetics.

  Examples of (d) hydrocarbon oil include isododecane, isohexadecane, hydrogenated polyisobutene, light liquid isoparaffin, mineral oil, squalane, polyisobutylene, polybutene, polyisobutene, polyolefin, and the like. It is preferable to use in combination, and it is more preferable to use hydrogenated polyisobutene and mineral oil in combination. It is possible to provide a water-in-oil liquid emulsion composition that is excellent in sustainability of the moisturizing effect, and excellent in usability at low temperatures and stability at high temperatures.

  (D) The content of the hydrocarbon oil is preferably 5% by mass or more and 30% by mass or less, and more preferably 10% by mass or more and 20% by mass or less with respect to the water-in-oil liquid emulsion composition.

  The water-in-oil liquid emulsion composition of the present invention preferably contains (e) silicone oil that is usually used in cosmetics. Thereby, it can be set as the water-in-oil type liquid emulsion composition with favorable elongation at the time of application | coating. The silicone oil is preferably one or more types of silicone oil.

(E) The silicone oil can be a cyclic or linear silicone oil. Cyclic silicone oil is also called cyclomethicone. For example, cyclomethicone such as cyclopentasiloxane, cyclotetrasiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, and the like can be used, and cyclopentasiloxane is preferable. As the linear silicone oil, for example, a methyl-substituted polyorganosiloxane (polydimethylsiloxane or dimethicone) such as dimethylpolysiloxane, diethylpolysiloxane, phenylmethylpolysiloxane, and diphenylpolysiloxane can be used, and is a dimethylpolysiloxane. It is preferable that the viscosity is 1 mm ² / s or more and 300 mm ² / s. Moreover, (e) amino modified silicone, silicone wax, etc. can also be used for silicone oil.

  (E) The content of silicone oil is preferably 10% by mass or less, more preferably 1% by mass or more and 8% by mass or less, with respect to the water-in-oil liquid emulsion composition.

  In addition to (d) hydrocarbon oil and (e) silicone oil, the water-in-oil liquid emulsion composition of the present invention may use one or more other oil phase components.

  One or more other oil phase components include, for example, saturated and / or unsaturated branched and / or unbranched alkanecarboxylic acids having a chain length of 3 to 30 carbon atoms. Group of esters of saturated and / or unsaturated branched and / or unbranched alcohols having a chain length of 3 to 30 carbon atoms, aromatic carboxylic acids and chains of 3 to 30 carbon atoms A component selected from the group of esters of saturated and / or unsaturated branched and / or unbranched alcohols having a length can be included. In such cases, such ester oils are treated with isopropyl myristate, isopropyl palmitate, isopropyl stearate, isopropyl oleate, n-butyl stearate, n-hexyl laurate, n-decyl oleate, isooctyl stearate, isononyl stearate, Isononyl isononanoate, 2-ethylhexyl palmitate, 2-ethylhexyl laurate, 2-hexyldecyl stearate, 2-octyldodecyl palmitate, oleyl oleate, oleyl erucate, erucyl oleate, erucyl erucate and such esters Can be advantageously selected from the group consisting of synthetic, semi-synthetic and natural products, such as jojoba oil.

  The one or more other oil phase components include, for example, other branched and unbranched hydrocarbon oils and hydrocarbon waxes, dialkyl ether groups, saturated or unsaturated branched chains, and the like. Linear or unbranched alcohols and fatty acid triglycerides, i.e. saturated and / or unsaturated branched and / or unbranched having a chain length of 8 to 24 carbon atoms, in particular 12 to 18 carbon atoms The oil phase component can also be advantageously selected from the group of triglycerol esters of branched alkanecarboxylic acids. Fatty acid triglycerides are advantageously selected from the group of synthetic, semi-synthetic and natural oils such as olive oil, sunflower oil, soybean oil, peanut oil, rapeseed oil, almond oil, palm oil, coconut oil, palm kernel oil, etc. Can be. Hydrocarbon oil components such as mineral oil and hydrogenated polyisobutene and vegetable oils can be suitably used.

  The one or more other oil phase components are advantageously selected from fat and / or wax components selected from the group of, for example, plant waxes, animal waxes, mineral waxes and petrochemical waxes. For example, candelilla wax, carnauba wax, beeswax, esparto glass wax, cork wax, guaruma wax, rice germ oil wax, sugar cane wax, berry wax, ouricure wax, montan wax , Jojoba wax, shea butter, beeswax, shellac wax, beeswax, whale wax, lanolin (wool wax), tail oil gland grease, petroleum jelly, ceresin, earth wax (earth wax (earth wax)), paraffin wax and It can be selected from the group consisting of waxes. The fat or wax component may be chemically modified wax and synthetic wax, such as glyceryl tribehenate, C16-36-fatty acid triglyceride, C18-36-fatty acid, etc. Ester wax, Sasol wax, hydrogenated jojoba wax, synthetic or modified bee wax (for example, dimethicone copolyol bee wax, C30-50-alkyl bee wax, etc.), polyalkylene wax, polyethylene glycol wax, etc. . Also chemically modified fats such as hydrogenated vegetable oils (eg hydrogenated castor oil or hydrogenated coconut fat glycerides), triglycerides such as trihydroxystearin, fatty acids, fatty acid esters and glycol esters such as C20- It may be 40-alkyl stearate, C20-40-alkyl hydroxy stearoyl stearate or glycol montanate. Among these, beeswax, lanolin, petrolatum, ceresin and microcrystalline wax are preferable, and beeswax, petrolatum and microcrystalline wax can be used more suitably.

[Other ingredients]
In addition to the essential components (a) to (c) above, the water-in-oil liquid emulsion composition of the present invention includes components usually used in cosmetics, such as solid oils, semisolid oils, higher alcohols, higher grades. Fatty acids, pigments, vitamins, polymer latex, ceramides, vitamins and the like can be appropriately contained. In addition, other active ingredients such as UV scattering components, astringent components, anti-inflammatory components, anti-aging components, whitening components, coating agents (alkyl acrylate / dimethicone copolymer), water repellents, and touch-enhancing powders (PMMA) Etc.), thickeners (xanthan gum, hyaluronic acid, polysaccharides such as cellulose or derivatives thereof, acrylic polymers such as carbomers, etc.), moisturizers, drugs, plant extracts, blood circulation promoters, cooling agents, antiperspirants Agents, bactericides (such as ethanol), skin activators, pH adjusters (such as sodium hydroxide), antioxidants, preservatives (such as phenoxyethanol, paraoxybenzoate), and flavoring agents.

  Further, the water-in-oil liquid emulsion composition of the present invention comprises the following anions, chloride ions, and further inorganic oxo element anions, among which sulfate ions, carbonate ions, phosphate ions, borate ions and aluminate ions. , Electrolytes selected from the group of salts containing, and the like. Also contains electrolytes based on organic anions such as lactate, acetate, benzoate, propionate, tartrate, citrate, malate, amino acid, ethylenediaminetetraacetate, and salts thereof You can also Among these, sodium chloride, magnesium sulfate, citrate, lactate and malate are preferable, and sodium chloride and magnesium sulfate are more preferable.

(Dynamic viscoelasticity measurement)
The water-in-oil liquid emulsion composition of the present invention has a ratio (G ″ / G ′) of loss elastic modulus (G ″) to storage elastic modulus (G ′) of 1 in dynamic viscoelasticity measurement. The strain (γ) is preferably 10% or more and 40% or less, G ′ and G ″ are each preferably 10 Pa or more and 100 Pa or less, and the strain (γ) is 15% or more. More preferably, it is 30% or less, and G ′ and G ″ are more preferably 30 Pa or more and 90 Pa or less. Thereby, elongation at the time of application | coating is favorable, it can be set as the water-in-oil type liquid emulsion composition which does not have stickiness and is comfortable to skin. When the viscoelasticity of the composition of the present invention is measured, the composition has the characteristic that the elastic property is superior when the strain amount is low, and the viscosity property is superior when the strain is high, and further G " Since the viscoelastic properties change greatly with the amount of strain at which / G ′ becomes 1, the difference in the amount of stickiness and familiarity when the composition is stretched on the skin depends on the amount of strain at this time. I found.

With respect to the water-in-oil liquid emulsion composition of the present invention, the dynamic viscoelasticity can be measured as follows.
Measurement condition:
Equipment: Physica MCR301 manufactured by Anton Paar
Plate: Stainless steel cone plate CP-50
Measurement temperature: 25 ° C
Operation: 1.1 g to 1.6 g of the water-in-oil liquid emulsion composition of the present invention is weighed on a pedestal, set to a gap of 0.05 mm and a frequency of 1 Hz, and the strain is changed from 0.001% to 1000%. To measure.
From the obtained data, the strain (γ), storage elastic modulus (G ′) and loss elastic modulus (G ″) at the point where the data plots of the storage elastic modulus (G ′) and loss elastic modulus (G ″) intersect are calculated. Dynamic viscoelasticity is obtained by reading.

  The following examples further illustrate the present invention. In addition, this invention is not limited to description of a following example, unless the summary is exceeded.

[Examples 1 to 16, Comparative Examples 1 to 17]
Water-in-oil liquid emulsion compositions having the formulations described in Tables 1 and 2 were produced by a conventional method. Specifically, Group A, which was mixed and heated under heating, was added to Group A, which was mixed and heated under heating, and was coarsely emulsified. The formulations of Examples 1 to 16 are shown in Table 1, and the formulations of Comparative Examples 1 to 17 are shown in Table 2. About the produced water-in-oil liquid emulsion composition, the properties of the dosage form at 25 ° C., the stability at 50 ° C., the fluidity at 5 ° C., no stickiness, moist feeling, 24-hour moisturizing effect and dynamic viscoelasticity, Measured and evaluated. In addition, the dynamic viscoelasticity measurement is performed only when the properties of the dosage form at 25 ° C. are liquid, and no other measurement / evaluation is performed when the properties of the dosage form at 25 ° C. are cream-like. Even if the properties of the dosage form at 0 ° C. were liquid, other evaluations were not performed for those having an evaluation of stability at 50 ° C. or fluidity at 5 ° C. x.

The properties of the dosage form at 25 ° C. were evaluated as follows.
When about 50 g of a water-in-oil liquid emulsion composition is put in an airtight glass bottle having a diameter of 4 cm and left to stand until the internal temperature reaches 25 ° C., the glass bottle is slowly tilted at a constant speed by 90 degrees over 5 seconds. The time until the middle water-type liquid emulsion composition started to flow was measured, and the fluidity was determined as follows. In addition, it is preferable evaluation that it is liquid.
Liquid: Flows within 3 seconds Creamy: Does not flow within 3 seconds

The stability at 50 ° C. was evaluated as follows.
About 80 g of the water-in-oil liquid emulsion composition was put into a glass bottle having a diameter of 4 cm, and the glass bottle was placed in a thermostatic bath at 50 ° C. and left to stand under light shielding and stored. One week after warehousing, the appearance of the water-in-oil liquid emulsion composition was observed and determined as follows. In addition, it is preferable evaluation not to recognize separation.
(Stability evaluation criteria)
○: Separation is not allowed ×: Separation is allowed

About the fluidity | liquidity in 5 degreeC, it evaluated as follows.
About 50 g of the water-in-oil liquid emulsion composition was put in a 4 cm diameter airtight glass bottle, and the sample was left to stand until the internal temperature reached 5 ° C., and then the sample was slowly tilted at 90 ° C. over 5 seconds at a constant speed. The time until it started to flow was measured, and the fluidity was determined as follows. In addition, it is preferable evaluation to flow within 3 seconds.
(Evaluation criteria for liquidity)
○: Flows within 3 seconds ×: Does not flow within 3 seconds

The feeling of use, non-stickiness, ease of familiarity, and moist feeling were evaluated as follows.
When 15 μL each of the water-in-oil liquid emulsion composition was taken on the skin of the four panelists, and the paneler spread the water-in-oil liquid emulsion composition within a circular shape having a diameter of 5 cm, Evaluation was made based on whether or not you feel stickiness, whether or not you feel familiar, and whether or not you feel moist. In addition, it is preferable evaluation that it does not feel stickiness, it is preferable evaluation that it is easy to adjust, and it is preferable evaluation that a moist feeling is felt.

(Evaluation criteria for stickiness)
×: 2 or less respondents who did not feel sticky 〇: 3 respondents who did not feel sticky ◎: 4 respondents who did not feel sticky

(Evaluation criteria for familiarity)
×: Less than 2 people answered that it was easy to become familiar ○: 3 people answered that it was easy to become familiar ◎: 4 people answered that it was easy to become familiar

(Evaluation criteria for moist feeling)
×: Less than 2 respondents who felt moist feeling 〇: 3 respondents who felt moist feeling ◎: 4 respondents who felt moist feeling

The 24-hour moisturizing effect was evaluated as follows.
Apparatus: Courier + Khazaka, Corneometer CM825
Operation: 20 μL of a water-in-oil liquid emulsion composition was applied to a circle with a diameter of 3 cm on the inner side of both arms, and the stratum corneum capacitance before application and 24 hours after application was measured. The difference between the measured values before application and after 24 hours was calculated and determined as follows. In addition, it is more preferable evaluation that a difference is 5 or more.
(Evaluation criteria for 24-hour moisturizing effect)
×: Difference is less than 2 ○: Difference is 2 or more and less than 5 ◎: Difference is 5 or more

(* 1) KF-6017 (Manufacturer: Shin-Etsu Chemical Co., Ltd.)
(* 2) KF-6028 (Manufacturer: Shin-Etsu Chemical Co., Ltd.)
(* 3) KF-6038 (Manufacturer: Shin-Etsu Chemical Co., Ltd.)
(* 4) Leo Pearl KL2 (Manufacturer: Chiba Flour Milling Co., Ltd.)
(* 5) BENTONE 38VCG (Manufacturer: Elementis plc)

  According to the water-in-oil type liquid emulsified composition according to Examples 1 to 16, the elongation at the time of application is good, there is no stickiness, the skin conformity is good, the stability at high temperature and the low temperature It was possible to provide a water-in-oil liquid emulsion composition excellent in fluidity.

  Since the water-in-oil type liquid emulsion composition according to Comparative Example 1 and Comparative Example 2 does not contain any one of (a) cetyl dimethicone copolyol and (b) polyglyceryl diisostearate, Even when the dosage form is liquid, the feeling of use and the moisturizing effect are poor, the dynamic viscoelastic strain (γ) of the water-in-oil liquid emulsion composition is 10% or less, and the stability at 50 ° C. Caused a problem.

Further, in Comparative Examples 3 to 7, since the cetyl dimethicone copolyol is not contained as an emulsifier and a silicone emulsifier containing other polyoxyethylene groups is used, the dosage form at 25 ° C. is creamy or liquid. However, the usability and the moisturizing effect persistence is poor, the dynamic viscoelastic strain (γ) of the water-in-oil liquid emulsion composition is 10% or less, and the stability at 50 ° C is problematic. It was.
In Comparative Examples 8 to 17, cetyl dimethicone copolyol is contained as an emulsifier, but in an oil containing polyglyceryl isostearate or / and dextrin palmitate or disteardimonium hectorite instead of polyglyceryl diisostearate. When the water-type emulsified composition was prepared, there was a problem in any of good usability, fluidity, and stability, and none of them could satisfy all. In Comparative Example 12, the fluidity at low temperatures and the stability at 50 ° C. were good, but the feeling of use was x, and the dynamic viscoelasticity was always G ″> G ′. It did not cross, and when it was stretched to the skin, it was sticky and continued to be very unfamiliar with the skin.

Claims (6)

A water-in-oil liquid emulsion composition,
The following components (a) to (c);
(A) cetyl dimethicone copolyol,
(B) polyglyceryl diisostearate,
(C) contains water,
(C) The water-in-oil liquid emulsion composition whose content of water is 50 mass% or more and 80 mass% or less with respect to the water-in-oil liquid emulsion composition.   In the dynamic viscoelasticity measurement of the water-in-oil liquid emulsion composition, when the ratio of loss elastic modulus (G ″) to storage elastic modulus (G ′) (G ″ / G ′) is 1, strain ( 2. The water-in-oil liquid emulsion composition according to claim 1, wherein γ) is 10% or more and 40% or less, and G ′ and G ″ are 10 Pa or more and 100 Pa or less, respectively. (D) a hydrocarbon oil, and (e) a silicone oil,
The water-in-oil liquid emulsion composition according to claim 1 or 2, further comprising:   The water-in-oil liquid emulsion composition according to any one of claims 1 to 3, wherein the (b) polyglyceryl diisostearate is triglyceryl diisostearate. The content of (a) cetyl dimethicone copolyol is 0.5% by mass or more and 5% by mass or less with respect to the water-in-oil liquid emulsion composition,
5. The water-in-oil liquid according to claim 1, wherein the content of the polyglyceryl diisostearate is 0.5% by mass or more and 5% by mass or less with respect to the water-in-oil liquid emulsion composition. Emulsified composition. The content of the (d) hydrocarbon oil is 5% by mass or more and 30% by mass or less with respect to the water-in-oil liquid emulsion composition,
The water-in-oil liquid emulsion composition according to any one of claims 1 to 5, wherein the content of the (e) silicone oil is 10% by mass or less based on the water-in-oil liquid emulsion composition.