KR20170038739A - Cosmetic composition for protecting uv ray and preparing method for the same - Google Patents

Abstract

The present invention relates to a cosmetic composition and a production method thereof. More specifically, the present invention relates to an ultraviolet (UV)-protective cosmetic composition in which a ring mill base containing inorganic power particles is dispersed, wherein the average particle size of the inorganic powder particles ranges from 5 to 2,000 nm.

Description

TECHNICAL FIELD [0001] The present invention relates to a cosmetic composition for ultraviolet screening,

The present invention relates to a cosmetic composition for UV screening and a method for producing the same.

This application is based on Korean Patent Application No. 10-2015-0137946 submitted to the Korean Intellectual Property Office on September 30, 2015, and International Application PCT / The entire contents of which are incorporated herein by reference.

Inorganic cosmetics for blocking ultraviolet rays are widely used in the market by using inorganic powder particles which have no controversy about the harmfulness to the human body. However, when the size of the inorganic powder particles is large, whitening phenomenon There is a problem that appears.

The inorganic powder particles of the cosmetic for blocking ultraviolet rays are preferably small in particle size in order to reduce whitening, but when the size of the inorganic powder particles is small, the inorganic powder particles tend to aggregate in the formulations, The inorganic powder particles have a problem in that they have a low ultraviolet shielding ability, while causing a whitening phenomenon when they are applied to the skin.

Therefore, it is required to develop cosmetics for blocking inorganic wires that can reduce the opacity phenomenon and improve the ultraviolet shielding ability. However, as a mixing method or a mixing device used for dispersing the powder in the production of the conventional cosmetics, It is difficult to ensure high dispersibility and it is difficult to maintain a stable formulation for a long period of time while maintaining high dispersibility even when the dispersibility is increased.

Disclosed is a method for dispersing a cosmetic composition capable of improving ultraviolet shielding ability while increasing the dispersibility of fine inorganic powder particles and suppressing whitening during skin application, and a cosmetic composition prepared by such a dispersing method.

The present invention provides a cosmetic composition for UV shielding in which a ring-mill base containing inorganic powder particles is dispersed in a ring mill, wherein the inorganic powder particles have an average particle size of 5 nm to 2000 nm.

Also, the present invention provides a method for producing a ring-shaped bead, comprising: a ring-mill mixing step of mixing an inorganic powder particle having a diameter of 5 nm to 2000 nm and a ring bead; And a ring-mill dispersing step of stirring the ring-shaped base.

The present invention can provide a cosmetic composition which exhibits excellent ultraviolet shielding ability while improving the dispersibility of fine inorganic powder particles and suppressing the whitening phenomenon upon application of the skin by ring-milling the ring-mill base containing the inorganic powder particles.

FIG. 1 is a photograph of the dispersed state of Comparative Example 1 prepared in Reference Example 3 after its manufacture. FIG.
Fig. 2 is a photograph of the dispersed state of Example 4 prepared in Reference Example 3 after its manufacture. Fig.

The ultraviolet screening cosmetic composition according to the present invention and a method for producing the same will be described in detail below.

The names of the compounds referred to herein are to be understood as meaning the International Nomenclature Cosmetic (INCI) listed on the International Cosmetic Ingredient Dictionary (ICID) issued by the Cosmetic, Toiletry and Fragrance Association (CTFA) Ingredient Name means a compound according to the IUPAC nomenclature established by the International Union of Pure and Applied Chemistry (IUPAC) if the name does not exist in the INCI Name, Means a compound corresponding to the name of a compound commonly used in the technical field of the present invention unless the compound according to the IUPAC nomenclature is present.

The cosmetic composition for protecting ultraviolet rays according to the present invention is produced by ring-milling a ring-mill base, and the ring-mill base will be specifically described as follows.

The above-mentioned ring-mill dispersion will be described in detail as follows.

A ring-mill mixing step (S10) of mixing the inorganic powder particles and the ring beads,

In one embodiment of the present invention, the average diameter of the ring beads is 0.1 mm to 3.0 mm. If the average linear stiffness of the ring beads is less than 0.1 mm, dispersion may not be achieved well, and if it exceeds 3.0 mm, dispersion may not be achieved well.

In one embodiment of the present invention, the ring beads are beads made of zirconia, beads made of tungsten carbide, or combinations thereof.

A ring-mil dispersion step (S20) of stirring the ring-

In one embodiment of the present invention, the ring-mill dispersion step is performed at a temperature between 20 ° C and 100 ° C. If the temperature is less than 20 캜, the physical dispersion may not be good, and if it exceeds 100 캜, the components in the ring-mill base may be denatured.

In one embodiment of the present invention, the stirring speed of the ring-mill base is 100 rpm to 1000 rpm. If the stirring speed is less than 100 rpm, no dispersion occurs, and if the stirring speed is more than 1000 rpm, it may occur in the stirring device.

In one embodiment of the present invention, the ring-mill dispersion step is performed for 30 to 120 minutes. If the execution time of the ring-mill dispersion step is less than 30 minutes, the dispersion may not be sufficient, and if it exceeds 120 minutes, the temperature increase may denature the component in the ring-mill base and the yield of the ring-milled base decreases.

Hereinafter, the ring-type base according to the present invention will be described in detail.

Ring-mill base

1) inorganic powder particles

The ring-mill base according to the present invention comprises inorganic powder particles, wherein the average particle size of the inorganic powder particles is from 5 nm to 2000 nm. When the average particle size of the inorganic powder particles is less than 5 nm, the ultraviolet blocking effect is weak. When the average particle size of the inorganic powder particles is more than 2000 nm, the light scattering in a wide wavelength range including the visible light region is scattered, cause.

In one embodiment of the present invention, the inorganic powder particles are at least one selected from the group consisting of zinc oxide, titanium dioxide, cerium oxide and zirconium dioxide.

In one embodiment of the present invention, the inorganic powder particles are selected from the group consisting of aluminum hydroxide, stearic acid, triethoxycaprylsilane, alumina, silica, aluminum stearate, isostearic acid, polyhydroxy-stearic acid , Hydrogenated dimethicone, simethicone, methicone, PEG-10 dimethicone, perfluorooctyltriethoxysilane, manganese dioxide, sodium metaphosphate, sodium polyacrylate, and triethoxysilylethanolylphenyldimethylsiloxy Hexyldimethicone, and hexyldimethicone.

In one embodiment of the present invention, the content of the inorganic powder particles is 5 wt% to 80 wt%, preferably 20 wt% to 70 wt% with respect to the total weight of the composition.

2) Increasing agent

In one embodiment of the present invention, the ring-based base is selected from the group consisting of distearammonium hectorite, stearalkonium hectorite, trihydroxystearin, vinyl dimethicone / methicylsyesquioxane crosspolymer, polymethylsilsesquioxane, Silica, polymethylmethacrylate, talc, and mica. ≪ IMAGE > The viscosifier can appropriately maintain the viscosity of the ring-based base, suppress deposition of the inorganic powder particles in the ring-based base, and prolong the shelf life of the cosmetic composition for ultraviolet shielding.

In one embodiment of the present invention, the content of the thickener is 0.1 wt% to 10 wt%, preferably 0.5 wt% to 2 wt% with respect to the total weight of the composition.

3) Distribution media

In one embodiment of the present invention, the ring-mill base is selected from the group consisting of alcohol sulphonates having 12 to 15 carbon atoms, cyclopentasiloxane, caprylic / capric triglyceride, dimethicone, dicaprylyl carbonate, isopropyl myristate, Dodecanol, and dodecanol.

In one embodiment of the present invention, the content of the dispersion medium is 20 wt% to 90 wt% with respect to the total weight of the composition.

4) Dispersant

In one embodiment of the present invention, the ring-based base is selected from the group consisting of acrylate / ethylhexyl acrylate / dimethicone methacrylate copolymer, wriglyceryl-3 polylysinolate, polyhydroxystearic acid, polyglyceryl- 10 dimethicone, phage-10 dimethicone, lauryl phage-9 polydimethylsiloxy ethyldecichone, bis-phage-10 dimethicone, / Dipenta-14/14 dimethicone, phage-30 dipolyhydroxy stearate, and polyglyceryl-2 dipolyhydroxy stearate.

In one embodiment of the present invention, the content of the dispersing agent is 0.5% by weight to 20% by weight based on the total weight of the composition.

Hereinafter, the above-described ultraviolet ray cosmetic composition in which the above-mentioned ring-mill base is dispersed with a ring-mill is specifically described.

Ultraviolet cosmetic composition

In one embodiment of the present invention, the viscosity of the cosmetic composition is 3000 to 100000 cps.

In one embodiment of the present invention, the SPF of the cosmetic composition is 10 to 60. [

As used herein, " SPF " is determined by the " COLIPA International Sun Protection Factor Test Method "(COLIPA, May 2006) The increase in the firing threshold (minimum eruption dose, MED) is determined as a function of irradiation time.

The composition according to the present invention may contain, in addition to the above-mentioned substances, other ingredients which can give synergistic effects to the main effect, preferably to the extent that the main effect is not impaired. The composition according to the present invention may further comprise colorants, moisturizers, emollients, ultraviolet absorbers, preservatives, bactericides, antioxidants, pH adjusters, fragrances, coolants or restraining agents widely used in the technical field of the present invention. The compounding amount of the above components can be easily selected by a person skilled in the art within a range not to impair the objects and effects of the present invention.

In one embodiment of the present invention, the composition may be formulated containing a cosmetically or dermatologically acceptable medium or base.

In one embodiment of the present invention, the formulation of the composition is any one selected from the group consisting of a water-in-oil type, an underwater type and an oil-dispersed type.

In one embodiment of the present invention, the formulation of the composition is impregnated in a foamed polymer foam. More preferably, the foamed polymer foam is foamed urethane foam.

When the composition is impregnated in a foamed polymer foam, the dispersion stability in which the water phase component and the oil phase component are not separated increases.

Hereinafter, the present invention will be described in more detail by way of examples. However, these embodiments are intended to illustrate the present invention only, and the scope of the present invention is not limited by these embodiments.

≪ Referential Example 1 > Manufacture of a ring-milled base

Production examples 1 to 3 were mixed in the following composition in the following Table 1 to prepare a ring-milled base.

In the case of Production Examples 1 and 2, Components 3 to 6 shown in Table 1 below which are in an oil state were mixed, and they were wetted with the components 1 and 2 in Table 1 below and mixed with the mixed components 3 to 6 A ring-milled base was prepared.

In Production Example 3, Components 3 to 6 in Table 1 below were mixed and then dispersed in an agitation mixer together with Component 7 in Table 1 below. A ring-milled base was prepared by wetting components 1 and 2 of Table 1, which are in powder state, and then mixing them with dispersed components 3 to 7.

ingredient Ingredients Composition (unit: g) Production Example 1 Production Example 2 Production Example 3 One Particulate Titanium Oxide * Aluminum Hydroxide * Stearic Acid (Titanium Dioxide * Aluminum Hydroxide * Stearic Acid) 30 33 30 2 Zinc oxide * Triethoxycaprilylsilane 25 27 25 3 C12-15 alcohol svenzoid 26.5 21.5 25.7 4 Piggy-10 Dimethicone 2.5 2.5 2.5 5 Acrylate / ethylhexyl acrylate / dimethicone methacrylate copolymer * Cyclopentasiloxane 8 8 8 6 Polyhydroxystearic acid * lecithin * ethylhexyl palmitate * isopropyl palmitate * isostearic acid * polyglyceryl-3 polyricinolate 8 8 8 7 Distearmonium hectorite - - 0.8

≪ Referential Example 2 > Dispersion of ring-based base and measurement of its viscosity

The ring-mill bases of Preparation Examples 1 to 3 were each ring-milled and dispersed by rotating them in a vessel containing zirconia beads having an average diameter of 230 nm at a temperature of 30 ° C to 80 ° C for 1 hour with a 500 rpm agitator to prepare compositions of Examples 1 to 3 .

The compositions of the prepared compositions of Examples 1 to 3 were measured for their viscosity by a spindle number (No. 64, No. (BROOKFIELD RVDV-III ULTRA (Serial No. RY6521152)), which was set at a spindle speed (SPM) of 29 and a spindle speed (RPM) of 12 rpm.

division Example 1 Example 2 Example 3 Viscosity (cps) 6000 60000 45000

As shown in Table 2, in Example 1 containing about 55% by weight of the inorganic UV-blocking agent, the viscosity was as low as 6000 cps, indicating that the dispersion was good. In Example 2, In the case of Example 3, it can be confirmed that the inorganic UV blocking agent having a high density is prevented from being immersed with time because the thickening agent is included.

In the case of Example 1, since the viscosity was low, it was difficult to suspend the inorganic powder particles in the formulation, and the phenomenon of deposition, in which the inorganic powder particles were settled, and the phenomenon of cohesion due to deposition were partially generated, , Even when the viscosity is lower than that of Example 2, it was confirmed that the inorganic powder was floated by forming a network on the oil phase due to distearammonium hectorite, which is a contained component, so that the inorganic powder particles did not sink and the formulation was stably maintained.

≪ Referential Example 3 > Preparation of ultraviolet screening composition

ingredient Ingredients Example 4 and Comparative Example 1
(Unit: g) One C12-15 alcohol svenzoid 11.65 2 Particulate Titanium Oxide * Aluminum Hydroxide * Stearic Acid (Titanium Dioxide * Aluminum Hydroxide * Stearic Acid) 12 3 Zinc oxide * Triethoxycaprilylsilane 10 4 Piggy-10 Dimethicone One 5 Acrylate / ethylhexyl acrylate / dimethicone methacrylate copolymer *
Cyclopentasiloxane 3 6 Polyhydroxystearic acid * lecithin * ethylhexyl palmitate * isopropyl palmitate * isostearic acid * polyglyceryl-3 polyricinolate 3 7 Distearmonium hectorite 0.35 8 Cyclopentasiloxane * Cyclohexasiloxane 26.5 9 Lauryl phage-9 polydimethylsiloxy ethanedimethicone 1.5 10 Distearmonium hectorite One 11 Purified water 24.05 12 Disodium iodide 0.05 13 Sodium chloride (ICID), sodium chloride (KP) 0.5 14 Butylene glycol 5 15 Phenoxyethanol 0.4

In the case of Example 4, a ring-mill base in which the components 1 to 7 of Table 1 were dispersed was mixed with the components 8 to 10 to prepare an oil phase. The aqueous phase containing components 11 to 15 of Table 1 was slowly mixed with the prepared oil phase and emulsified at 7000 rpm for 10 minutes to prepare an ultraviolet ray blocking composition.

In the case of Comparative Example 1, Components 3 to 15 were mixed, and the components 1 and 2 in the powder state were mixed by wetting and dispersed by a homomixer at 7000 rpm for 10 minutes to prepare an oil phase. Thereafter, the aqueous phase containing the components 11 to 15 was slowly mixed into the prepared oil phase, and emulsified at 7000 rpm for 10 minutes to prepare an ultraviolet ray blocking composition.

 <Test Example 2> Measurement of viscosity and formulation stability

Comparative Example 1 and Example 4 prepared in Reference Example 3 were photographed after their preparation, and they are shown in FIG. 1 and FIG. 2, respectively.

1, unlike the formulation of Comparative Example 1, which can observe amorphous inorganic powder particles having a diameter of 20 μm or larger, the formulation of Example 4 shows that the inorganic powder particles are fine Size distribution.

The viscosity of each of Example 4 and Comparative Example 1 prepared in Reference Example 3 was measured under the same conditions as those of Reference Example 2 and the period during which the formulation remained stable under each measurement condition was measured, 4. The criterion determining that the formulation remains stable is that the following lumen and oil separation do not occur within the formulation.

1. Agglomeration - Reduced gloss of the outer appearance, check for odontoid particles on the surface when pushed on a glass plate. Check for foreign objects when applying skin.

2. Separation of Oil - When the temperature was recovered to room temperature from a 45 ° C thermostat (manufactured by JISCO) and a cycle device (LTI-1001SD manufactured by EYELA) which repeatedly changed the temperature range from -10 ° C to 45 ° C, To form a transparent oil band. (Formulation is white and can be distinguished)

Comparative Example 1 Example 4 Viscosity (cps) 80000 17000 Stability 45 ° C thermostat 7 days 60 days Cycle equipment 14 days 90 days

As shown in Table 4, in Comparative Example 1 in which homomixing was applied in the same composition, inorganic UV blocking agent was not properly dispersed as compared with Example 4 in which ring-milling dispersion was applied, so that aggregation in the formulation accelerated, It can be confirmed that separation does not occur due to not being mixed with excessively.

On the other hand, in Example 4 using the ring-milling dispersion, the stability is excellent and the viscosity is about 1/5 lower than that of Comparative Example 1 in which homomixing is applied.

&Lt; Referential Example 4 > Preparation of ultraviolet screening composition

Comparative Example 2 was prepared in the same manner as in Example 4 of Reference Example 3 and in the same procedure as Comparative Example 1 of Reference Example 3 except that the composition was changed as shown in Table 5 Ingredients 1 to 4).

In the case of Example 5, the ring-mill base in which the components 1 to 4 of Table 1 were dispersed was mixed with the components 8 to 10 to prepare an oil phase. The aqueous phase containing components 11 to 15 of Table 1 was slowly mixed with the prepared oil phase and emulsified at 7000 rpm for 10 minutes to prepare an ultraviolet ray blocking composition.

In the case of Comparative Example 1, Components 4 and 8 to 15 were mixed, and the components 1 and 2 in the powder state were mixed by wetting and dispersed by a homomixer at 7000 rpm for 10 minutes to prepare an oil phase. Thereafter, the aqueous phase containing the components 11 to 15 was slowly mixed into the prepared oil phase, and emulsified at 7000 rpm for 10 minutes to prepare an ultraviolet ray blocking composition.

ingredient Ingredients Example 5 and Comparative Example 2
(Unit: g) One Particulate Titanium Oxide * Aluminum Hydroxide * Stearic Acid (Titanium Dioxide * Aluminum Hydroxide * Stearic Acid) 8 2 Zinc oxide * Triethoxycaprilylsilane 8 3 Ethyl hexylmethoxycinnamate 7 4 Ethylhexyl salicylate 4 8 Cyclopentasiloxane * Cyclohexasiloxane 26.5 9 Lauryl phage-9 polydimethylsiloxy ethanedimethicone 1.5 10 Distearmonium hectorite One 11 Purified water 24.05 12 Disodium iodide 0.05 13 Sodium chloride (ICID), sodium chloride (KP) 0.5 14 Butylene glycol 5 15 Phenoxyethanol 0.4

&Lt; Test Example 4 >

To measure the sun protection factor, the light intensity of the ultraviolet rays emitted to the test site on the left and right sides except for the spine of 12 subjects consisting of 6 males and 6 females was measured using IL1733 Radiometer and 20 To 100 mj / cm &lt; 2 &gt; and irradiated with a solar simulator (Xenon UV Lamp 1 KW, unfiltered) lamp. Minimal Erythema Dosa (MED) was confirmed at 24 hours after UV irradiation. To confirm the ultraviolet blocking effect of the sample, the sample of Example 1 and Comparative Examples 1 and 2 were coated uniformly at a thickness of 2 쨉 l / cm 2 at a thickness of 2 쨉 l / And allowed to stand for 15 minutes to dry. The ultraviolet ray irradiation window was attached and fixed to the sample application areas of Comparative Examples 2 and 5, and ultraviolet rays were irradiated to other portions except for the irradiation windows by cutting off ultraviolet rays using leather and a towel. SPF 50 based on MED of subject, SPF 15-40, expected sample, beginning with dose, gradually increasing UV dose. The minimum erythema was determined after 24 hours of ultraviolet irradiation, and the ultraviolet blocking effect was calculated according to Equation (1) shown below.

[Equation 1]

(SPF) of the sample = (minimum erythema amount of the area to which the sample is applied) / (minimum erythema amount of the area where the sample is not applied)

Comparative Example 2 Example 5 SPF measurement value 38 57.5

Referring to Table 6, it can be seen that the SPF measurement value of Example 5 in which the ring-milling dispersion was applied was improved by about 1.5 times as compared to Comparative Example 2 where homomixing was applied in the same composition.

Claims (5)

1. A cosmetic composition for UV shielding in which a ring-mill base containing inorganic powder particles is dispersed in a ring-
Wherein the average particle size of the inorganic powder particles is from 5 nm to 2000 nm. The method according to claim 1,
Wherein the inorganic powder particles are at least one selected from the group consisting of zinc oxide, titanium dioxide, cerium oxide and zirconium dioxide. The method according to claim 1,
The ring-based base may be selected from the group consisting of distearammonium hectorite, stearalkonium hectorite, trihydroxystearine, vinyl dimethicone / methicyl silsesquioxane cross polymer, polymethylsilsesquioxane, silica, polymethyl methacrylate, talc And at least one thickening agent selected from the group consisting of mica. The method according to claim 1,
Wherein the content of the thickening agent is 0.1 wt% to 10 wt% with respect to the total weight of the composition. A ring-mill mixing step of mixing an inorganic powder particle having a particle diameter of 5 nm to 2000 nm and a ring bead; And
And a ring-mill dispersing step of stirring the ring-shaped base.

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