KR20170065947A - Oil-ball type cosmetic compositions - Google Patents

Abstract

The present invention provides a cosmetic composition characterized in that spherical particles of oily phase having a viscosity of 500 to 100,000 cP are dispersed in an aqueous phase having a viscosity of 2,000 to 12,000 cP. The cosmetic composition of the present invention not only has excellent dispersion stability, but also provides excellent feeling of use.

Description

Oil-ball type cosmetic compositions

The present invention relates to a cosmetic composition, and more particularly, to a cosmetic composition in which an oil phase, which is a discontinuous oil phase, is dispersed in a continuous phase water phase, and an oil phase component is dispersed in a ball form.

Conventional submerged-type cosmetic compositions contain fatty acids and oils (especially silicone oils) in the oil phase and require an emulsifier to completely emulsify the water phase and the oil phase. In this case, when the amount of the emulsifier is insufficient or the emulsifying ability of the emulsifier is lowered, there is a problem in stability over time in which the oil phase and the water phase are separated again, resulting in deterioration of the product quality.

To solve this problem, a method has been developed in which an oil phase is first prepared in the form of a bead and uniformly dispersed in an aqueous phase to prepare a cosmetic composition. However, commercial beads have a coating film formed of microcrystalline cellulose, corn starch or the like in order to secure the stability of beads and when the cosmetic composition is applied to the skin by the coating film, the shape of the beads is not easily broken, .

In order to solve this problem, a cosmetic composition has been developed which improves wettability due to easy dissolution of particles at the time of skin application. However, since it contains solid waxes, it has a relatively heavy feeling and a high temperature have.

In addition, an oil drop cosmetic composition has been developed in which an oil phase separates from the upper part of the water to form a drop, but the oil drop is located in the lower layer of the composition and has a disadvantage of shaking and mixing during use.

Accordingly, the inventors of the present invention have felt the necessity of an oil-in-water (O / W type) cosmetic composition having an excellent feeling on use while uniformly distributing oil components in the water phase without separately using a surfactant, And the researchers.

Therefore, the inventors of the present invention intend to provide a cosmetic composition in which an oil phase, which is a discontinuous phase, is dispersed in a continuous phase aqueous phase without using any surfactant.

That is, it is intended to provide a cosmetic composition in which the two phases are mixed by using a specific viscosity between the continuous phase and the discontinuous phase so that the components of the oil phase (oily phase) have a specific particle size in the aqueous phase and are dispersed.

The inventors of the present invention are also intended to provide a cosmetic composition in the form of an oil-in-water type, which is excellent in stability over time and does not undergo a change in formulation over time in order to solve the above problems.

In addition, it is intended to provide a cosmetic composition having excellent skin feeling and excellent feeling on use.

In order to solve the above problems, the present invention is to provide a cosmetic composition in which an oil phase, which is a discontinuous phase, is dispersed in the form of particles in a continuous phase of water phase.

Specifically, the present invention provides an underwater-type cosmetic composition characterized in that oily spherical particles having a viscosity of 500 to 100,000 cP are dispersed in an aqueous phase having a viscosity of 2,000 to 12,000 cP.

The viscosity can be measured using, for example, a viscometer such as Brooklyn viscometer, preferably a Brooklyn viscometer at a rotational speed of 30 rpm using a 4-spindle bar.

In one embodiment of the present invention, the viscosity of the water phase and the oil phase contained in the cosmetic composition is determined by the shear rate at the time of manufacturing the cosmetic composition, the matrix phase viscosity of the continuous phase, the viscosity of the oil phase (discontinuous phase) Dispersed phase viscosity, and the difference in surface tension between the continuous phase and the discontinuous phase.

In one embodiment of the present invention, the water phase may comprise 10 to 30% by weight, preferably 13 to 25% by weight, based on the total weight of the composition. And may have the viscosity of the aqueous phase to which the present invention is aimed within the above-mentioned content range.

In one embodiment of the present invention, in order to prepare a cosmetic composition in the form of an oil-in-water type having excellent stability over time, the difference in surface tension between oil phase and water phase can be maintained to be twice or more.

For example, when the critical surface tension of the water phase is around 72 (dyne / cm), the critical surface tension used in the present invention is about 20 to 30 (dyne / cm).

As used herein, the term " dispersion " means that the different materials are evenly distributed in one material. Particularly, in the present specification, the meaning of dispersion means that the spherical particles of the oil phase of the present invention have a certain shape and are uniformly distributed at a uniform rate per unit volume.

The term "uniformly distributed" as used herein means a state in which spherical particles of oil phase do not float to the lower layer of the water phase, do not float on the upper layer, and spread with a certain distance between spherical particles having a certain size do.

Therefore, the case where the water phase and the oil phase form a layer, or the case where the spherical particle is seated in the lower layer of the water phase is a form distinct from the evenly distributed case of the present invention.

As used herein, the term 'spherical particles' means that oily oil components are present in a spherical form as a whole, and the oil-ball used in the present specification is used as a concept included in oily spherical particles. The spherical shape of the present invention is a concept that encompasses not only a geometrically perfect spherical shape but also a streamlined shape without a vertex.

The oily spherical particles of the present invention may be contained in an amount of 0.0001 to 30% by weight based on the total weight of the cosmetic composition.

When the oil phase spherical particles contained in the water phase are in the above-mentioned content ranges, formation of spherical particles and dispersion stability can be excellent.

The diameter of the oily spherical particles contained in the cosmetic composition of the present invention may have a statistical median of 10 to 1000 mu m, preferably 50 to 800 mu m, more preferably 80 to 700 mu m per particle. If the size of the spherical particles is less than the above-mentioned size, the spherical particles may not be visualized and the feeling of use may be poor. If the spherical particles are larger than the above-mentioned size, the stability may be poor and the spherical particles may float in the upper layer of the water phase.

The water phase may comprise a water soluble component comprising a polyol.

The polyol may be at least one selected from the group consisting of glycerin, polyethylene glycol, dipropylene glycol, butyleneglycol, pentylene glycol, methylpropanediol, sorbitol, diglycerin, erythritol, pentaerythritol, polybutylene glycol- , Polyglycerin-4, polyglycerin-6, polyglycerin-10, polyglycerin-20, polyglycerin-40, sorbes-5, sorbes-6, sorbes-20, sorbes- , Mannitol, mannose, lactitol, lactose, dihydroxypropyl PG-glucoside, dithiaoctanediol, fructose, glucamine, methylglucamine, glucose, 1,2,6-hexanediol , Methylglucose-10, methylglucose-20, ozonized glycerin, phytantriol, thioglycerin, traitol, trimethylol propane, and xylitol, and preferably Glycerin, It may include propylene glycol, Butylene glycol, or mixtures thereof.

The oil phase of the present invention may contain an oil component.

The oil is an oil component generally used as a component of cosmetics, medicines and the like and is an oil component generally used as a component of ascorbyl palmitate, ascorbyl nitrate, ascorbyl stearate, distearyl salicylate, benzyl benzoate, benzyl laurate, Butyryl glycol stearate, butyl isostearate, cetearyl isononanoate, cetearyl nanoate, cetyl caprylate, cetyl caprylate, Ethylhexyl isononanoate, ethylhexyl isostearate, ethylhexyl laurate, hexyl laurate, octyldodecyl, ethylhexyl acrylate, ethylhexyl acrylate, Isostearyl isostearate, isostearyl isonicotinate, isostearyl isostearate, isostearyl isostearate, isostearyl isononanoate, isostearyl isostearate, iso Neopentyl glycol diisocyanate, neopentyl glycol diisostearate, pentaerythrityl stearate, pentaerythritol tetraethyl hexanoate, neopentyl glycol diisocyanate, neopentyl glycol diisocyanate, neopentyl glycol diisostearate, And at least one ester selected from the group consisting of hydrogenated polyisobutene and sucralene, avocado oil, wheat germ oil, rosehip oil, shea butter Corn oil, corn oil, safflower oil, soybean oil, rapeseed oil, macanadia nut oil, jojoba oil, palm oil, camellia oil, almond oil, olive oil, macadamia oil, argan oil, meadowfoam oil, sunflower oil, Palm kernel oil and coconut oil. Or higher vegetable oil; And C8-12 acid triglyceride, C12-18 acid triglyceride, caprylic / capric / triglyceride, caprylic / capric / lauric triglyceride, C10-20 isoalkyl acid triglyceride, C10-18 triglyceride, Glyceryl triacetyl hydroxystearate, soybean glyceride, tribehenin, tricaprin, triethylhexanoyl, triheptanedin, triisostearin, tripalmitin and tristearin can be used. Examples of the silicone-based oil include cyclopentasiloxane, cyclohexasiloxane, cycloheptasiloxane, cyclomethicone, cyclophenylmethicones, cyclotetrasiloxane, cyclotrisiloxane, dimethicone, caprylimethicone, caprylyltrimethicone, But are not limited to, limechicone, cetearylmethicone, hexadecylmethicone, hexylmethicone, laurylmethicone, myristylmethicone, phetylmethicone, stearylmethicone, scaryldimethicone, And at least one selected from the group consisting of chitosan, dimethylpolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane, methyltrimethicone, and phenyltrimethicone.

The cosmetic composition may further comprise an aging agent in an amount of 0.1 to 0.5% by weight based on the total weight of the composition.

The weight ratio of the thickener to the water phase may be 1: 100 to 1: 1000. When the mixing ratio of the thickener and the water phase is within the above range, the viscosity range of the water phase of the present invention can be achieved and an oil-ball having excellent stability over time can be formed. If the weight of the aqueous phase is excessively greater than 1: 100, the oil ball is excessively thickened, which is difficult to form. If the weight of the aqueous phase is less than 1: 1000, the stability of the oil ball produced may be poor.

The thickening agent may be used regardless of the type of the thickener used in the industry for producing the cosmetic composition, and may include, for example, a carbomer.

The cosmetic composition according to the present invention may contain an appropriate amount of fragrances, dyes, pigments, preservatives, bactericides, antioxidants, pearlescent agents and various cosmetic agents in addition to the above components. The present invention can be used within a range that does not impair the purpose of the present invention.

The cosmetic composition of the present invention is not particularly limited as long as it is an underwater type cosmetic composition, and can be preferably applied to formulations such as a softening agent, face cleanser and the like.

The present invention can provide a cosmetic composition in which an oil phase, which is a discontinuous phase, is dispersed in a continuous phase aqueous phase without using any surfactant. That is, a cosmetic composition in a dispersed state in which an oil phase component has a specific particle size in an aqueous phase is provided.

The cosmetic composition of the present invention is excellent in stability over time, has no deformation of the formulation over time, and has excellent wettability to the skin, thereby providing excellent feeling of use.

Figure 1 shows a micrograph of spherical particles (oil-balls) in oil phase.
Fig. 2 shows a state in which spherical particles in an oil phase are uniformly dispersed in an aqueous phase.
3 is a photograph showing the state of the cosmetic composition of Example 1 and Comparative Example 1 immediately after the production. As can be seen from FIG. 3, it was confirmed that the shape of spherical particles (oil-balls) in oil phase was somewhat uniform and that the oil particles were evenly distributed in the water phase. However, in Comparative Example 1, Respectively.
4 is a photograph showing the state of Comparative Examples 2 to 4 immediately after the production. In Comparative Examples 2 and 3, the oil balls themselves were not formed. In the case of Comparative Example 4, the particles were made in an irregular state rather than a spherical shape, and the stability was not good due to this shape.
FIG. 5 is a photograph showing that spherical particles were not formed in all of Comparative Examples 1 and 2 when stored at 50 ° C.

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the embodiments according to the present invention can be modified into various other forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. The embodiments of the present invention are provided by way of example to facilitate a specific understanding of the present invention.

Example  1 and Comparative Example  Manufacturing of 1-4

The moisturizing cosmetic compositions having the compositions of the examples and comparative examples in the following Table 1 were prepared by the following method. The units are expressed as% by weight.

1. The raw materials of the water-receiving portion were evenly dispersed at 3,000 rpm for 15 minutes in an Agi Mixer.

2. The agglomerating agent was dispersed with the aqueous phase at a low agitation speed of 1,500 rpm for 5 minutes.

3. The oil phase was slowly added, stirred thoroughly, defoamed and discharged.

Compounding ingredient Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Awards Purified water Balance Balance Balance Balance Balance glycerin 5 2 2 2 2 Diplo Filen Glycoll 5 3 3 3 3 Butylene glycol 5 2 2 2 2 ethanol 5 5 5 5 5 Preservatives (1,2-Hexanediol) Suitable amount Suitable amount Suitable amount Suitable amount Suitable amount Chelating agent (EDTA) Suitable amount Suitable amount Suitable amount Suitable amount Suitable amount Tromethamine 0.3 0.05 1.0 0.3 0.3 Paid Cyclopentasiloxane &
Dimethicone crosspolymer 5 5 5 0.5 7 Dimethicone 2 2 2 6.5 0 Pigment Suitable amount Suitable amount Suitable amount Suitable amount Suitable amount Incrementer Carbomer 0.3 0.05 1.0 0.3 0.3

[ Experimental Example  1] Evaluation of stability

To confirm whether the formulations were formed according to the difference in viscosity between the trauma and the inward phase, a cosmetic having the viscosity of the external phase and the viscosity of the internal phase described in Tables 2 and 3 was prepared and evaluated for stability.

The viscosities of the following Tables 2 and 3 were obtained by measuring the viscosity at room temperature for 1 minute using a 4-spindle bar at a rotation speed of 30 rpm with a viscometer (Brookfield DV-E).

1. Viscosity of trauma (continuous phase)

Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Viscosity (cP, centipoise) 7000 1500 15000 7000 7000

2. Viscosity of inner phase (discontinuous phase)

Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Viscosity (cP, centipoise) 5000 5000 5000 100 100,000 <

3. Results - Time Stability Assessment

The results of the experiment of Example 1 and Comparative Example 1-4 were visually observed for the degree of separation / unification of the formulations in the room temperature and 50 degree thermostatic chambers immediately after the preparation and after 30 days.

stability Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Immediately after manufacture stability stability
(Large particles) Non-manufacturing
(No particle formation) Non-manufacturing
(No particle formation) stability
(Particle irregularity) 50 degrees, one month stability detach - - detach Room temperature, month stability detach - - stability

As can be seen from the results of Table 4 and FIGS. 2 and 3, it was confirmed that the oil particles were properly formed in Example 1 and the stability was maintained at 50 degrees for one month.

Particularly, as can be seen from FIG. 1, when the cosmetic composition of Example 1 was examined with a microscope (Leica DMRP, Leica Microsystems), distinct spherical particles separated from the aqueous phase were identified.

However, as in Comparative Example 1, when the viscosity of the water phase (external phase) was less than 2000 cP, the phenomenon that the oil particles were combined and separated into the upper layer was observed when one month had elapsed. As in Comparative Example 2, Exceeds 12000 cP, the liquid oil could not be granulated and no oil balls were formed in the water phase.

Further, in Comparative Examples 3 and 4, the viscosity of the water phase was fixed and the oil viscosity of the oil phase was changed. As a result, the oil particle size was changed according to the viscosity of the oil phase. , It was confirmed that the oil ball particles were not formed and irregular particles were formed instead of spherical particles when the viscosity of the oil phase was high as in Comparative Example 4. The stability was also not good.

The results of the above Examples and Comparative Examples 1-4 are shown in the drawings.

[ Experimental Example  2] Moisturizing effect and Percutaneous  Water loss ( TEWL : Transepidermal  Water Loss

1. Purpose of Testing

The moisturizing effect and transepidermal water loss (TEWL) evaluation test were measured using the formulations of Example 1, Comparative Example 1 and Comparative Example 4 among the above-mentioned prescription examples (formulation examples).

2. Test Overview

The water content of the ventral forearm was measured before application of the sample using the Corneometer CM825, and the contents of the water were measured after application of the sample. Also, the amount of transdermal water loss was measured using a Tewameter TM210, and the extent of the change was evaluated.

3. Experimental Results

(1) Results of moisturizing effect measurement

Before use 30 minutes later After 1 hour After 3 hours After 6 hours After 12 hours After 24 hours Example 1 23.85 42.91 35.65 35.27 30.86 28.83 27.65 Comparative Example 1 23.65 41.79 30.85 31.43 29.65 27.75 26.15 Comparative Example 4 23.65 38.52 28.75 28.25 25.26 24.15 23.95

Measured value (unit: A.U. (Arbitrary Unit)

Before use After 1 hour After 3 hours After 6 hours After 12 hours After 24 hours Example 1 79.92 49.48 47.88 29.39 20.88 15.93 Comparative Example 1 76.70 30.44 32.90 25.37 17.34 10.57 Comparative Example 4 62.88 21.56 19.45 6.81 2.11 1.27

Conclusions: The results of the evaluation of the instant, initial, middle, late and sustained moisturizing ability according to the size and uniformity of the particles show that the uniform formulation has a relatively excellent moisturizing ability compared to the formulation having a non-uniform particle size (Comparative Example 4) The oil-in-water emulsion showed the best moisture-retaining performance in Example 1 in which the oil particles were not aggregated and dispersed evenly.

(2) Results of transdermal water loss measurement

Before use After 1 hour After 3 hours After 6 hours After 12 hours After 24 hours Example 1 8.47 6.76 6.35 6.59 7.21 7.35 Comparative Example 1 8.52 7.05 6.97 7.29 7.75 8.29 Comparative Example 4 8.47 7.62 7.51 7.92 8.09 8.32

Measured value (unit: g / cm ³ h)

After 1 hour After 3 hours After 6 hours After 12 hours After 24 hours Example 1 20.19 25.03 22.20 14.88 13.22 Comparative Example 1 17.25 18.19 14.44 9.04 2.70 Comparative Example 4 10.04 11.33 6.49 4.49 1.77

Improvement rate (%)

Conclusion: As a result of evaluation of the transdermal water loss according to the particle size and uniformity, it was found that when the particle size is uneven or the oil particles are clumped, transdermal water loss occurs and the distribution of oil particles is evenly dispersed. Respectively.

Claims (8)

Oily spherical particles having a viscosity of 500 to 100,000 cP
Wherein the cosmetic composition is dispersed in an aqueous phase having a viscosity of 2,000 to 12,000 cP. The cosmetic composition according to claim 1, wherein the oil phase spherical particles have a diameter per particle of 10 to 1000 占 퐉. The cosmetic composition according to claim 1, wherein the cosmetic composition comprises 0.0001 to 30% by weight of spherical particles in oil phase, based on the total weight of the cosmetic composition. The method of claim 1, wherein the aqueous phase comprises a polyol,
Wherein the oil phase comprises at least one oil selected from the group consisting of an ester oil, a silicone oil, a hydrocarbon oil, and a vegetable oil. The cosmetic composition according to claim 1, wherein the aqueous phase comprises 10 to 30% by weight of polyol based on the total weight of the composition. 5. The method of claim 4, wherein the polyol is selected from the group consisting of glycerin, polyethylene glycol, dipropylene glycol, butyleneglycol, pentaerythritol, methylpropanediol, sorbitol, diglycerin, erythritol, pentaerythritol, polybutylene glycol- 10, polyglycerin-3, polyglycerin-4, polyglycerin-6, polyglycerin-10, polyglycerin-20, polyglycerin-40, sorbes-5, sorbes-6, sorbes- Glucosamine, glucose, 1, 2, 3, 4, 5, 6, 7, At least one selected from the group consisting of 2,6-hexanediol, methylglucose-10, methylglucose-20, ozonized glycerin, phytantriol, thioglycerin, traitol, trimethylolpropane and xylitol Makeup Dangerous. The cosmetic composition according to claim 1, wherein the cosmetic composition further comprises an aging agent in an amount of 0.1 to 0.5% by weight based on the total weight of the composition. The cosmetic composition according to claim 7, wherein the thickening agent is a carbomer.

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