WO2018044035A1 - Oil-in-water type cosmetic composition - Google Patents

Abstract

The present invention relates to an oil-in-water type cosmetic composition containing oil capsules and a continuous phase, wherein the oil capsules are obtained by filtering a dispersed phase through a ceramic separation film into the continuous phase, wherein the dispersed phase contains a cationic oil and a non-polar oil, and wherein the continuous phase contains water.

Description

Oil-in-water cosmetic composition

The present invention relates to an oil-in-water cosmetic composition.

Microcapsules may be prepared by interfacial polymerization, phase separation, air suspension coating, electropolymerization, or spray drying. Natural polymers such as albumin, gelatin, starch, ethyl cellulose, polyalkylcyanoacrylate, etc. Method for preparing microcapsules using synthetic polymers, coating and encapsulation of active materials to segregate them from the external environment and improving their stability by increasing sustained release. Various methods are known, such as the manufacturing method.

However, conventionally known methods for preparing microcapsules require a microfluidic process or a complicated operation of a device using the same. Thus, the yield of microcapsules is not high.

In addition, when preparing a microcapsules using a homomixer such as a multi-emulsification method, it is difficult to uniformly adjust the size of the capsule, so that the monodispersity falls, there was no significant difference in appearance with the general emulsion formulation.

The present invention is to provide an oil-in-water cosmetic composition excellent in monodispersity and formulation stability using a simple and high yield process.

The present invention is an oil-in-water cosmetic composition comprising an oil capsule and a continuous phase,

The oil capsule is obtained by transmitting the dispersed phase into the continuous phase through the ceramic separator,

The dispersed phase comprises a cationic oil and a nonpolar oil,

The continuous phase contains water.

The present invention can provide an oil-in-water cosmetic composition having excellent monodispersity by dispersing an oil capsule in a continuous phase using a cationic oil and a nonpolar oil in a dispersed phase, and is a complicated method of a conventional microfluidic process or a device using the same. It provides an oil-in-water cosmetic composition comprising a fine oil capsule in a high yield simply without sophisticated manipulation.

In addition, the present invention can stabilize the oil without the addition of a surfactant, and even by dispersing or dissolving in the aqueous phase, even in the case of functional raw materials that the formulation becomes unstable, by dispersing in the oil phase in an oil capsule, it is possible to secure the formulation stability When the pearl component is included in the oil capsule, a bright appearance may be realized when the oil-in-water cosmetic composition is applied to the skin.

Figure 1 is an enlarged photograph of the oil capsule dispersion state in the formulation of Example 2.

Figure 2 is a photograph showing the actual measurement of the oil capsule dispersion state in the formulation of Example 2.

Hereinafter, an oil-in-water cosmetic composition according to the present invention will be described.

Names of compounds mentioned in this specification, unless stated otherwise, are listed in the International Cosmetic Ingredient Dictionary (ICID) published by the Cosmetic, Toiletry and Fragrance Association (CTFA), INCI (International Nomenclature Cosmetic). Ingredient) A compound corresponding to a name, and if the name does not exist among INCI Names, it means a compound according to the IUPAC nomenclature established by the International Union of Pure and Applied Chemistry (IUPAC). The absence of a compound according to the nomenclature means a compound corresponding to the name of a compound commonly used in the art.

As used herein, "oil in water" (O / W) means a cosmetic formulation in which the inner phase is an oil phase and the outer phase is an aqueous phase.

The cosmetic composition according to the invention comprises an oil capsule and a continuous phase.

Oil capsules

The cosmetic composition according to the present invention comprises an oil capsule obtained by transmitting a dispersed phase into a continuous phase through a ceramic separator.

As used herein, the term "capsule" refers to a carrier having a structure that blocks or inhibits mass transfer between the interior of the partition and the exterior of the partition due to a barrier formed of one or more layers.

In the present specification, "oil" refers to a material in which a phase or phase is separated from an aqueous phase in which all or a part of the oil includes water when mixed with water in a state of normal temperature and normal pressure.

In the present specification, "oil capsule" means a carrier in which the oil forms a partition structure.

In one embodiment according to the present invention, the average particle diameter of the oil capsule is 50 to 200 μm. If the average particle diameter of the oil capsule is less than 50 μm, it is difficult to visually identify the oil capsule in the formulation, and if it is more than 200 μm, the oil capsule in the formulation may not be produced.

In one embodiment according to the present invention, the oil capsule is obtained by transmitting the dispersed phase into the continuous phase through the ceramic separation membrane, which will be described below.

In one embodiment of the present invention, the ceramic separator is made of an aluminum oxide-silicon oxide glass porous body.

In one embodiment of the present invention, the average pore diameter of the ceramic separator is 10 to 50 μm. If the average pore diameter of the ceramic separator is less than 10 μm, it is difficult to visually identify the ointment capsule in the formulation, and if more than 50 μm, the oil capsule in the formulation may not be produced.

In one embodiment of the present invention, the aluminum oxide-silicon oxide glass porous body is obtained by heating and acid-treating a mixture of silas volcanic ash and boric acid.

In the present specification, "Shirasu volcanic ash" means volcanic ash lime which is an aluminum oxide-silicon oxide glass porous body produced in southern Kyushu, Japan.

In one embodiment of the present invention, the oil capsule is obtained by pressing the dispersed phase to a pressure of 0.02 to 0.05 bar against the ceramic separator and permeate into the continuous phase.

In one embodiment according to the present invention, the oil capsule is obtained by droplet spraying the dispersed phase in a continuous phase, which will be described below.

Disperse phase

Disperse phases according to the invention comprise cationic oils and nonpolar oils.

In one embodiment of the present invention, the cationic oil is an oil having a molecular weight of 1,000 or less having an amine group, a cationic silicone oil represented by the following formula (1), or a mixture thereof.

[Formula 1]

In Formula 1, R ₁ and R ₂ are independently an alkyl group having 1 to 20 carbon atoms unsubstituted or substituted with an amine group, and n is an integer of 1 to 600.

In one embodiment of the present invention, the oil having a molecular weight of 1,000 or less having an amine group preferably contains an amine group, not an amide group, more preferably, hexyldecyl myristoyl Methylaminopropionate (Hexyldecyl Myristoyl Methylaminopropionate) to be.

In one embodiment of the present invention, the cationic silicone oil is amodimethicone, aminopropyl dimethicone or a mixture thereof.

In one embodiment of the present invention, the content of the cationic oil is 0.1 to 10% by weight based on the total weight of the composition.

In one embodiment of the present invention, the non-polar oil is any one or more selected from the group consisting of hydrocarbon oil, ester oil, diester oil, triglyceride oil, carbonate oil, alcohol oil and silicone oil to be.

In one embodiment of the present invention, the hydrocarbon-based oil is any selected from the group consisting of squalene, hydrogenated polyisobutene, hydrogenated poly (C6-14 olefin), hydrogenated polydecene, paraffin, ceresin and microcrystalline wax. More than one.

In one embodiment of the present invention, the ester oil is triethylhexanoin, cetylethylhexanoate, cetyloctanoate, cetylisooctanoate, octyldodecyl myristate, isopropyl palmitate, isopropyl myridine State, Butyleneglycol Dicaprylate / Dicaprate, Tocopherol Acetate, Coco-Caprylate / Caprate, Jojoba Seed Oil, Dicaprylic Carbonate, Pentaerythritol Tetraethylhexanoate and Pentaerythritol Tetraisostearate At least one selected from the group consisting of.

In one embodiment of the present invention, the diester oil is butylene glycol dicaprylate, dicaprate, diisostearyl malate, di-C12-13 alkyl malate, neopentyl glycol diheptanoate, tridecyl stearate At least one selected from the group consisting of latex, naerpentyl glycol dicaprylate / dicaprate, tridecyl trimellitate and dicapriryl carbonate.

In one embodiment of the present invention, the carbonate oil is dialkyl carbonate.

In one embodiment of the present invention, the triglyceride oil is selected from the group consisting of caprylic / capric triglycerides, caprylic / capric / stearic triglycerides, triethyloctanoin and tricapryline Being more than one.

In one embodiment of the present invention, the alcohol oil is in the group consisting of octyldodecanol, 2-butyloctanol, 2-hexyldecanol, 2-undecylpentadecanol, oleyl alcohol and isostearyl alcohol One or more selected.

In one embodiment of the present invention, the silicone oil is dimethicone, cyclomethicone, polydimethylsiloxane, methylphenylpolysiloxane, methylcyclopolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, At least one selected from the group consisting of tetradecamethylhexasiloxane and octamethyltrisiloxane.

In one embodiment of the present invention, the content of the non-polar oil is 0.1 to 20% by weight based on the total weight of the composition.

In one embodiment of the present invention, the weight ratio of the cationic oil to the nonpolar oil is 1: 1 or more and 1: 4 or less, preferably 1: 2 or more and 1: 3 or less. If the weight ratio is less than 1: 1, the entanglement phenomenon occurs remarkably when passing through the ceramic separator, so that the monodispersity of the liquid crystal capsule is significantly lowered. If the weight ratio is greater than 1: 4, the stability of the oil capsule formed at a temperature higher than room temperature Significantly lowered.

In one embodiment of the present invention, the dispersed phase further comprises a trapping material. The collecting material refers to a material supported in an oil capsule.

In one embodiment of the present invention, the trapping material is a lipophilic compound. The lipophilic compound is not particularly limited as long as it can be dissolved in oil.

In one embodiment of the present invention, the trapping material further comprises a pearl component.

In one embodiment of the present invention, the pearl component is mica powder, synthetic mica powder, mica powder, kaolin powder, titanium dioxide powder, titanium oxide coated mica powder, aluminum powder, iron sulfate powder, iron oxide powder and barium sulfate At least one selected from the group consisting of.

In one embodiment of the present invention, the trapping material further comprises a pigment.

In one embodiment of the present invention, the pigment is titanium dioxide (TiO ₂ ), zinc oxide (zinc oxide, ZnO), iron oxide (iron oxide, FeO, Fe ₂ O ₃ or Fe ₃ O ₄ ), At least one selected from the group consisting of aluminum oxide (alumina, Al ₂ O ₃ ), barium sulfate (BaSO ₃ ), silicon dioxide (silica, SiO ₂ ), talc, kaolin, sericite and mica to be.

In one embodiment of the present invention, the total content of the dispersed phase is 5 to 35% by weight based on the total weight of the composition, preferably the total content of the cationic oil and nonpolar oil mixture in the dispersed phase is based on the total weight of the composition , 10 to 20% by weight. If the total content of the dispersed phase is greater than 35% by weight, no oil capsules may be produced in the formulation.

Continuous phase

The continuous phase according to the invention comprises water.

In one embodiment of the present invention, the water content is 60 to 90% by weight based on the total weight of the composition. If the water content is less than 60% by weight or more than 90% by weight, no oil capsules may be produced in the formulation.

In one embodiment according to the invention, the continuous phase further comprises a thickener.

In one embodiment according to the invention, the thickener in the group consisting of carbomer, guar gum, xanthan gum, carboxy methyl cellulose, hydroxyethyl cellulose, sodium polyacrylate, hydroxypropyl cellulose and sodium hyaluronate At least one selected.

In one embodiment according to the present invention, when the thickener is a carbomer, by dispersing the oil of the dispersed phase and forming coacervation, the dispersed phase forms a thin film at the droplet interface to form an oil capsule in the formulation Improves stability.

In one embodiment of the present invention, the content of the thickener is 0.2 to 1% by weight based on the total weight of the composition.

In one embodiment according to the invention, the continuous phase further comprises ammonium acryloyl dimethyl taurate / behenes-25 methacrylate crosspolymer. The ammonium acryloyl dimethyl taurate / behenes-25 methacrylate crosspolymer is included in a continuous phase with a thickener to increase dispersibility and to prevent the oil capsules from floating or agglomeration of oil capsules with each other. .

In addition, the composition according to the present invention may include other ingredients in addition to the above-mentioned materials within a range not impairing the main effect, preferably a synergistic effect on the main effect. In addition, the composition according to the present invention may further include a moisturizer, an emulsifier, a UV absorber, a preservative, a fungicide, an antioxidant, a pH adjuster, organic and inorganic pigments, flavorings, coolants or limiting agents. The compounding quantity of the said component can be selected easily by a person skilled in the art within the range which does not impair the objective and effect of this invention.

Hereinafter, an Example is given and this invention is demonstrated in detail. However, these embodiments are only intended to describe the present invention in detail, and the scope of the present invention is not limited by these embodiments.

Preparation Example Preparation of Oil-in-water Cosmetic

After mixing the dispersion phase according to the composition of Table 1, the mixed dispersion phase was pressurized to pass through the ceramic separator in a continuous phase under the process conditions of Table 2 to extrude to prepare an oil-in-water cosmetic.

Phase	ingredient	Ingredient Name	content ( weight% )
			Example  One	Example  2	Example 3	Comparative example  One
Disperse phase	Cationic oil	Hexyldecyl myristoyl methylaminopropionate	6	4	2.4	12
	Nonpolar oil	Squalene	6	8	9.6	-
	Trapping material	Green Tea Enzyme (Soluble Powder)	0.005	0.005	0.005	0.005
Continuous phase	Pigment	SQUALANE * LITHOSPERMUM ERYTHRORHIZON ROOT EXTRACT	0.8	0.8	0.8	0.8
	Preservative	Phenoxyethanol	0.3	0.3	0.3	0.3
	Preservative	Ethylhexylglycerin	0.05	0.05	0.05	0.05
	Thickener	Carbomer	0.2	0.2	0.2	0.2
	Ammonium Acryloyl Dimethyl Taurate / Behenes-25 Methacrylate Crosspolymer		0.2	0.2	0.2	0.2
	water		to 100	to 100	to 100	to 100

Process item		Process condition of the item
Pressurized Extrusion Equipment		Trade name IMK-20 manufactured by MCTech.
Ceramic Membrane Installed in Pressure Extrusion Equipment	Manufacturer / product name	Trade name SPG membrane manufactured by SPG Technology Co., Ltd.
	Average pore diameter	50 μm
	Membrane thickness	0.7 ± 0.3 mm
Extrusion Pressure of Dispersed Phase		0.02 bar
Powdery gas		nitrogen
Continuous flow condition		Spindles immersed in a continuous phase at a speed of 150 rpm
Temperature condition during extrusion		25 ℃

< Test Example  1> Underwater type Cosmetic  Formulation stability observation

Formulation stability of Example 1, Example 2, Example 3 and Comparative Example 1 prepared in the above Preparation Example was observed.

In Example 1, some oil capsules were entangled in the separator during preparation, and thus the monodispersity of the oil capsules in the formulation was confirmed to be low.

As can be seen in Figure 1 (enlarged photograph: scale bar length at the bottom right-100 ㎛) and Figure 2 (measured photograph) showing the dispersion state of the oil capsule in the formulation of Example 2, the Example 2 is a separation membrane during manufacture There was no entanglement of the oil capsule in the formulation, it was confirmed that the monodispersity of the oil capsule in the formulation is high, and no deformation of the oil capsule even when exposed to high temperature of 45 ℃.

In Example 3, although the oil capsule was not entangled in the separator during preparation with Example 2, it was confirmed that the monodispersity of the oil capsule in the formulation was high, but some oil capsules were damaged when exposed to a high temperature of 45 ° C. This occurred to confirm that the stability of the oil capsule is lower than in Example 2.

In Comparative Example 1, the entanglement phenomenon of most oil capsules occurred in the separator during preparation, and it was confirmed that the monodispersity of the oil capsule in the formulation was greatly reduced.

After preparing the cosmetic composition of Example 1, Example 2, Example 3 and Comparative Example 1 prepared in the above Preparation Example, the stability of the formulation was observed and shown in Table 3 below.

	Example  One	Example  2	Example  3	Comparative example  One
Formulation Stability After Manufacturing	△	○	○	×

In Table 3, ○ means that the dispersion degree of the oil capsule in the composition is constant, △ means that the dispersion degree of some oil capsules in the composition is not constant, × is the dispersion degree of all oil capsules is not constant Means no.

Claims (6)

1. An oil-in-water cosmetic composition comprising an oil capsule and a continuous phase,

   The oil capsule is obtained by transmitting the dispersed phase into the continuous phase through the ceramic separator,

   The dispersed phase comprises a cationic oil and a nonpolar oil,

   The continuous phase is an oil-in-water cosmetic composition comprising water.
2. The method of claim 1,

   Oil-in-water cosmetic composition of the cationic oil: non-polar oil is 1: 1 or more, 1: 1 or less.
3. The method of claim 1,

   The cationic oil is an oil having a molecular weight of 1,000 or less having an amine group, a cationic silicone oil represented by the following formula (1), or an oil-in-water cosmetic composition is a mixture thereof:

   [Formula 1]

   

   In Formula 1, R ₁ and R ₂ are independently an alkyl group having 1 to 20 carbon atoms unsubstituted or substituted with an amine group, and n is an integer of 1 to 600.
4. The method of claim 1,

   The non-polar oil is an oil-in-water cosmetic composition of any one or more selected from the group consisting of hydrocarbon oil, ester oil, diester oil, triglyceride oil, carbonate oil, alcohol oil and silicone oil.
5. The method of claim 1,

   The ceramic separator is an oil-in-water cosmetic composition consisting of aluminum oxide-silicon oxide glass porous body.
6. The method of claim 5,

   The aluminum oxide-silicon oxide glass porous body is an oil-in-water type cosmetic composition of a mixture of Siras volcanic ash and boric acid heated and acid treated.

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