KR20190059064A - Emulsion containing titanum dioxide and zinc oxide with improving water resistance and oil-in-water cosmetic composition containing the same - Google Patents

Abstract

The present invention relates to an inorganic ultraviolet screening oil dispersion having improved water resistance for use in an oil-in-water cosmetic composition. More particularly, the present invention relates to an inorganic ultraviolet screening oil dispersion containing an inorganic ultraviolet screening agent, a dispersion medium, a dispersant and a film forming agent, and an oil-in-water cosmetic composition comprising the same. The inorganic ultraviolet screening oil dispersion according to the present invention, including a specific dispersant of HLB 9 or higher and a film forming agent together, improves the water resistance, dispersibility and stability while maintaining light feeling of the oil-in-water cosmetic composition when applied thereto.

Description

FIELD OF THE INVENTION The present invention relates to an inorganic ultraviolet screening oil dispersion having improved water resistance, and an underwater type cosmetic composition containing the same. Technical Field [0001] The present invention relates to an ultraviolet screening oil dispersion,

The present invention relates to an inorganic ultraviolet screening oil dispersion, and more particularly, to an inorganic ultraviolet screening oil dispersion having improved water resistance for applying to an underwater type cosmetic composition and an underwater type cosmetic composition containing the same.

It is widely known that sunlight can be divided into infrared light, visible light and ultraviolet light, among which ultraviolet light can adversely affect the skin. Ultraviolet rays can be classified into ultraviolet ray A (320 to 400 nm), ultraviolet ray B (290 to 320 nm) and ultraviolet ray C (200 to 290 nm) depending on the wavelength. Ultraviolet ray C and ultraviolet ray B reach the surface of the earth, and they have various effects on the skin of the human body, though the ultraviolet ray C and the ultraviolet ray B disappear because they can not reach the surface due to reflection or scattering while meeting the ozone layer. Ultraviolet B penetrates to the epidermis of skin to cause erythema, freckles and swelling, and ultraviolet ray A penetrates into the dermis of skin to induce melanin, wrinkle formation and skin cancer, thereby causing skin damage and skin aging .

In recent years, outdoor activities have been increasing due to increased leisure time and increased interest in health. Especially, as the risk of exposure to sunlight is known, consumers are very interested in UV protection products. Accordingly, products having various Sun Protection Factor (SPF) and Protection Factor in UVA (PFA) are being marketed.

UV protection products are largely classified into water-in-oil (W / O), oil-in-water (O / W) or non-aqueous depending on the composition of the constituted phases. The water-in-oil type has excellent water resistance and durability, but has a disadvantage in that it is poor in spreadability and is heavy and uncomfortable due to the oil component of the trauma. The underwater type has an advantage of being excellent in spreadability, being able to apply directly to the skin, and having a feeling of fresh feeling to which the moisture of the trauma is imparted, but it has insufficient water resistance and has a limit to persistence of effect by sweat and water. In the case of non-water type, there is an advantage that water resistance which is characteristic of water-in-oil type is good and unique feeling can be given.

Cosmetic compositions for ultraviolet shielding containing an existing water-in-water type emulsion generally contain emulsifiers and wax together with a sunscreen. In this case, when an inorganic material is used as an ultraviolet (UV) blocking agent, an ultraviolet ray shielding effect can be enhanced. However, an emulsifier or a dispersant is necessarily required due to mutual cohesion between particles. However, in the case of emulsifiers, due to the physical and chemical properties of the substance, the molecular weight is large and the structure is large, the stickiness can be increased, and when the contents are hand-picked and applied to the skin, In particular, the emulsifier used in the water-in-oil type emulsion has a role as a water-based detergent, which may seriously deteriorate make-up persistence against water or perspiration.

Accordingly, there is a further need for the development of a cosmetic composition for ultraviolet shielding which is improved in uniformity and stability of emulsification and improved in water resistance by solving the problem of lowering the dispersibility of the inorganic ultraviolet shielding component.

Korean Patent Publication No. 10-2012-0039205 Korean Patent Publication No. 10-2013-0138746

The present inventors have conducted various studies to solve the above problems. As a result, the present inventors have found that when the oil dispersions contain a specific dispersant and a film-forming agent together, the stability of the emulsion is improved, and when applied to an underwater type ultraviolet screening agent, It can be improved.

Accordingly, an object of the present invention is to provide an inorganic ultraviolet blocking oil dispersion which is applied to a cosmetic composition for underwater type ultraviolet screening and has excellent feeling, stability and water resistance, and an underwater type cosmetic composition containing the same.

According to an aspect of the present invention, there is provided an inorganic ultraviolet blocking oil dispersion,

An inorganic ultraviolet screening agent, a dispersion medium, a dispersant, and a silicone-based film forming agent, wherein the dispersant has an HLB value of 9 or more

The inorganic ultraviolet blocking oil dispersion according to the present invention improves the water resistance, dispersibility and safety while maintaining a light feeling of underwater type cosmetic composition when applied to an underwater type cosmetic composition including a specific dispersant of HLB 9 or higher and a film forming agent together .

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing the results of evaluation of the formulation stability of Example 2 and Comparative Examples 4 to 9 according to Test Example 1. Fig.
Fig. 2 is a graph showing the water resistance evaluation results of Example 2 and Comparative Examples 4 to 9 according to Test Example 2. Fig.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an oil-based dispersion of an inorganic sunscreen oil with improved water resistance and an underwater-type cosmetic composition containing the same according to the present invention will be described in detail.

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.

In this specification, an oil-in-water (O / W) type means an emulsion formulation in which the continuous phase is aqueous phase and the dispersed phase is oil phase.

As used herein, an emulsion formulation refers to a formulation in which a dispersed phase comprising one or more liquid phases in a continuous phase comprising one or more liquid phases is dispersed in a droplet form.

The present invention provides, in one aspect, an inorganic ultraviolet screening oil dispersion having improved water resistance for application to an underwater type cosmetic composition, more specifically, an inorganic ultraviolet screening agent, a dispersion medium, a dispersant, and a silicone film- The present invention relates to an inorganic ultraviolet blocking agent oil dispersion contained in an oil phase.

Inorganic sunscreen

The inorganic ultraviolet blocking agent oil dispersion according to the present invention includes an inorganic ultraviolet blocking agent.

In one embodiment of the present invention, the inorganic ultraviolet screening agent may be at least one selected from the group consisting of titanium oxide, zinc oxide, and iron oxide, preferably titanium dioxide or zinc oxide, More preferably, titanium dioxide can be used.

In addition, for the desired effect, the inorganic ultraviolet screening agent may be contained in an amount of 30 to 70% by weight based on the total weight of the oil dispersion. When the content of the inorganic ultraviolet screening agent is less than 30% by weight, the ultraviolet screening effect is deteriorated. When the content is more than 70% by weight, stability and dispersibility are deteriorated.

Distribution dealer

The inorganic ultraviolet blocking agent oil dispersion according to the present invention includes oil as a dispersion medium.

As used herein, " oil " means a material in which all or a part of the oil is separated from the water phase containing water when mixed with water at normal temperature and normal pressure. In the present invention, the oil is not particularly limited as long as it conforms to this definition and does not impair the intended effect of the present invention, but specific examples thereof will be described as follows.

In one embodiment of the present invention, the oil is at least one selected from the group consisting of a hydrocarbon oil, an ester oil, a diester oil, a triglyceride oil, a carbonate oil, an alcohol oil and a silicone oil .

In one embodiment of the present invention, the hydrocarbon-based oil is 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-based oil is selected from the group consisting of C12-C15 alkyl benzoate, triethylhexanoin, cetylethylhexanoate, cetyloctanoate, cetylisooctanoate, octyldodecyl myristate, iso Propyl palmitate, isopropyl myristate, butyleneglycol dicaprylate / dicaprate, tocopherol acetate, coco-caprylate / caprate, jojoba seed oil, dicaprylic carbonate, pentaerythritol tetraethylhexanoate and Pentaerythrityl tetraisostearate, and pentaerythrityl tetraisostearate.

In one embodiment of the present invention, the diester oil is selected from the group consisting of butylene glycol dicaprylate, dicaprate, diisostearyl malate, di-C 12-13 alkyl malate, neopentyl glycol diheptanoate, Naphthyl glycol dicaprylate / dicaprate, tridecyl trimellitate, and dicaprylyl carbonate.

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

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

In one embodiment of the present invention, the alcohol oil is selected from 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 selected from the group consisting of dimethicone, cyclomethicone, polydimethylsiloxane, methylphenylpolysiloxane, methylcyclopolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, Tetradecamethylhexasiloxane, and octamethyltrisiloxane. The term " a "

Further, for the intended effect, the content of the dispersion medium is from 20 to 50% by weight based on the total weight of the oil dispersion. If the content of the dispersion medium is less than 20% by weight, the dispersibility and stability are deteriorated. If the content is more than 50% by weight, the feeling of use is deteriorated.

Dispersant

The inorganic ultraviolet blocking oil dispersion according to the present invention comprises a dispersing agent, more specifically a dispersing agent having an HLB value of 9 or more, preferably a dispersing agent having an HLB value of 14 or more.

When the HLB value is less than 9, the emulsification is not good, and even if emulsified, the dispersibility and safety are lowered, and the improvement of the water resistance is not expected.

Here, HLB is a hydrophile-lipophile balance used in the field of a dispersing agent, and it is usually calculated using a calculation formula such as Kawakami's equation expressed by the following equation (1) Griffin). ≪ / RTI >

[Equation 1]

HLB = 7 + 11.7 log (Mw / Mo)

Here, Mw is the molecular weight of the hydrophilic group and Mo is the molecular weight of the hydrophobic group.

The HLB value according to the griffin is described in J. Floughshare. Cosm. Chem. 1954 (volume 5), pages 249-256.

Also, the HLB value described in the catalog may be used.

In one embodiment of the present invention, the dispersant is not particularly limited, but a nonionic dispersant is preferred. Examples of the nonionic dispersing agent include polyoxyethylenated sorbitol fatty acid esters, polyglycerin fatty acid esters, sorbitan fatty acid esters and sucrose fatty acid esters. The above-mentioned dispersant is not necessarily highly purified by distillation or the like, and may be a reaction mixture.

In one embodiment of the present invention, the polyoxyethylenated sorbitol fatty acid esters include polysorbate-20, polysorbate-60, and polyoxyethylene sorbitan fatty acid esters such as those sold under the trade names TWEEN 20, TWEEN 60 and TWEEN 80 by ICID. Sorbate-80 and the like can be used.

In one embodiment of the present invention, examples of the polyglycerin fatty acid ester include hexaglycerin monooleic acid ester, hexaglycerin monostearic acid ester, hexaglycerin monopalmitic acid ester, hexaglycerin monomyristic acid ester, hexaglycerin monolaurate Decaglycerol monooleate, decaglycerol monooleate, decaglycerol monooleate, decaglycerol monooleate, decaglycerol monooleate, decaglycerol monostearate, decaglycerol monopalmitate, decaglycerol monomyristate, decaglycerol monolaurate and the like. Examples of commercially available products include NIKKOL DGMS, NIKKOL DGMO-CV, NIKKOL DGMO-90V, NIKKOL DGDO, NIKKOL DGMIS, NIKKOL DGTIS, NIKKOL Tetraglyn 1-SV, NIKKOL Tetraglyn 1-O, NIKKOL NIKKOL Hexaglin 1-M, NIKKOL Hexaglyn 1-S, NIKKOL Hexaglyn 1-O, NIKKOL Hexaglyn 3-S, NIKKOL Hexaglyn 1-L, NIKKOL Hexaglyn 1-M, NIKKOL Hexaglyn 1-M, NIKKOL Hexaglyn 3-S, NIKKOL Tetraglyn 5-S, -B, NIKKOL Hexaglin 5-S, NIKKOL Hexaglyn 5-O, NIKKOL Hexaglyn PR-15, NIKKOL Decaglyn 1-L, NIKKOL Decaglyn 1-M, NIKKOL Decaglyn 1-SV, NIKKOL Decaglyn 1- NIKKOL Decaglyn 3-SV, NIKKOL Decaglyn 3-OV, NIKKOL Decaglyn 5-SV, NIKKOL Decaglyn 2-SV, NIKKOL Decaglyn 2-SV, NIKKOL Decaglyn 3-SV, NIKKOL Decaglyn 1-O, Decaglyn 5-HS, NIKKOL Decaglyn 5-IS, NIKKOL Decaglyn 5-OV, NIKKOL Decaglyn 5-OR, NIKKOL Decaglyn 7-S, NIKKOL Decaglyn 7-O, NIKKOL Decaglyn 10- -OV, NIKKOL De L-10D, L-7D, M-10D, M-7D, P-8D, S-28D, S-24D manufactured by Mitsubishi-Kagaku Foods Corporation, caglyn 10-MAC, NIKKOL Decaglyn PR- , SWA-20D, SWA-15D, SWA-10D, O-50D, O-15D, B-100D, B-70D, ER-60D, Taiyo Kagaku Co., Ltd. SUNSOFT Q-17UL, SUNSOFT Q-14S, SUNSOFT A-141C, Riken Vitamin Co., Ltd. Manufactured by POEM DO-100, POEM J-0021, etc. can be used.

In one embodiment of the present invention, examples of the sorbitan fatty acid ester include monocaprylic acid sorbitan, monolauric acid sorbitan, monostearic acid sorbitan, sesquistearic acid sorbitan, Sorbitan sesquioisostearate, sorbitan oleate, sorbitan sesquioleate, sorbitan trioleate, and the like can be used alone or in combination. Commercially available products include, for example, Nikko Chemicals Co., Ltd. SO-15V, SO-15V, SO-15V, SI-15V, SI-15RV, SO-15V, SO-15V, SS-10V, SS-10V , Sol-30V, 40V, 50V, 90, 110, etc manufactured by Daiichi-Kogyo Seiyaku Co., Ltd. can be used.

In one embodiment of the present invention, examples of the sucrose fatty acid ester include sucrose diester ester, sucrose distearate, sucrose dipalmitate, sucrose dimyristate, sucrose dilaurate, sucrose monooleate, sucrose monooleate, Sucrose mono-palmitate, sucrose monomyristate, sucrose monolaurate, and the like can be used alone or in combination. Examples of commercially available products include RYOTO-sugar ester S-070, S-170, S-270, S-370, S-370F, S-570, S-770, S- 1570, O-1570, L-195, P-1570, P-1670, M-1695, O-170, O-1570, S- L-595, L-1695, LWA-1570, B-370, B-370F, ER-190, ER-290, POS-135, Daiichi-Kogyo Seiyaku Co., Ltd. F-10E, F-A10E, COSMEKIKE B-30, S-10, S-50, S-70, S-110, S-160, S-190, SA-10, SA-50, P-10, P-160, M-160, L-10, L- 160A, R-10, R-20, O-10 and O-150.

Further, for the intended effect, the content of the dispersing agent is 5 to 15% by weight based on the total weight of the oil dispersion. If the content of the dispersant is less than 5% by weight, the dispersibility becomes poor. If the content is more than 15% by weight, the stability is deteriorated.

Silicone film forming agent

The inorganic ultraviolet blocking oil dispersion according to the present invention includes a silicone film former.

In one embodiment of the present invention, the silicone-based film-forming agent is not particularly limited, but a silicone acrylate-based copolymer or a silicone elastomer-based copolymer is preferable.

In one embodiment of the present invention, examples of the silicone acrylate-based copolymer include isobutyl methacrylate / bis-hydroxypropyl dimethicone acrylate copolymer, Butyl acrylate / hydroxypropyl dimethicone acrylate copolymer, but is not limited thereto. One or more of these may be used in combination.

In one embodiment of the present invention, examples of the silicone elastomer-based copolymer include polysilicone-11, stearoxymethicone / dimethicone copolymer, dimethicone / vinyl dimethicone copolymer, But it is not necessarily limited to them. The term " dimethicone / vinyldimethicone crosspolymer " One or more of these may be used in combination.

For the purpose of the desired effect, the silicone-based film-forming agent may be contained in an amount of 5 to 15% by weight based on the total weight of the oil dispersion. When the content of the silicone-based film-forming agent is less than 5% by weight, the water resistance effect is deteriorated. When the content is more than 15% by weight, dispersibility and stability are deteriorated.

In another aspect, the present invention relates to an underwater-type cosmetic composition comprising the above-described inorganic ultraviolet absorbent oil dispersion.

When preparing an underwater type cosmetic composition comprising the inorganic ultraviolet screening oil dispersion, the inorganic ultraviolet screening oil dispersion may be contained in an amount of 10 to 40% by weight based on the total weight of the composition. If the content of the oil dispersion is less than 10% by weight, the water resistance effect and ultraviolet ray shielding effect are deteriorated. If the oil dispersion is more than 40% by weight, the dispersibility and stability are deteriorated.

The water phase part of the cosmetic composition for underwater type according to the present invention provides a feeling of moisture and a feeling of fresh feeling, and the oil phase part containing the oil dispersion is discontinuously dispersed. The water receiving portion includes a moisturizing agent and water.

The moisturizing agent may be at least one selected from the group consisting of glycerin, propylene glycol, 1,3-butylene glycol, dipropylene glycol, sorbitol, polyglycerin, polyethylene glycol, 1,2-pentanediol, isoprene glycol, erythritol, xylitol, maltitol glycerin, But are not limited to, sodium, sodium pyrolidonecarboxylate, xyloglucan, carrageenan, pectin, mannan, cardan, galactan, deltansulfuric acid, glycocon, keratan sulfate, chondroitin, mucoitin sulfate, , Succinoglucan, carodinic acid, hyaluronic acid, heparan sulfate, sodium hyaluronate, collagen, chondroitin sulfate and the like.

The moisturizing agent may be included in an amount of 3 to 10% by weight based on the total weight of the cosmetic composition. If the content of the moisturizing agent is less than the above range, the function of moisturizing deteriorates. On the other hand, when the content of the moisturizing agent is more than the above range, stickiness may occur, which may affect the viscosity and properties of the composition.

The water may comprise distilled or purified water and may be used as the remainder relative to the total weight of the composition.

The oily portion of the cosmetic composition for underwater type according to the present invention may contain other emulsifiers, emollients, viscosity enhancers, skin conditioners and the like in addition to the inorganic ultraviolet blocking agent oil dispersion.

In addition, the cosmetic composition according to the present invention may further contain other ingredients, such as a preservative, a bactericide, an antioxidant, a pH A flavoring agent, a cooling agent, or a limiting agent.

The compounding amount of the above components can be easily selected by those skilled in the art within a range not to impair the objects and effects of the present invention.

Hereinafter, the present invention will be described more specifically with reference to examples and test examples. It is to be understood that the scope of the present invention is not limited to these examples and test examples, and that variations, substitutions, and insertions commonly known in the art And the like, and this is also included in the scope of the present invention.

≪ Preparation Example 1 > Preparation of dispersion

The oil dispersions and aqueous dispersions of Example 1 and Comparative Examples 1 to 3 were prepared according to the following methods with the compositions shown in Table 1 below. The units in Table 1 are percent by weight.

First, the components shown in the following Table 1 were put into a reactor, and the mixture was stirred at 25 DEG C at a speed of 2000 rpm for 30 minutes and then mixed. The mixture was stirred at 25 DEG C using a disperser (RRG-50 Rotate Mill, Dispersed at a dispersion speed of 1000 rpm and a stirring speed of 180 AGI for 2 hours to prepare an oil dispersion and an aqueous dispersion.

Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Titanium dioxide 50 50 50 50 water - - - 26 1,3-Butylene Glycol - - - 10 1,2-Hexanediol - - - 2 Dimethicone - - - 2 C12-C15 alkyl benzoate 30 40 45 - Polyglyceryl-3 Polyricinoleate (HLB 4) - - 5 - Polysorbate 60 (HLB 14.9) 10 10 - 10 Dimethicone (and) Polysilicone-11 5 - - - Isododecane (and) Isobutylmethacrylate / Bis-Hydroxypropyl Dimethicone Acrylate Copolymer 5 - - -

≪ Preparation Example 2 > Preparation of an underwater type cosmetic composition

The water-in-oil type cosmetic compositions of Example 2 and Comparative Examples 4 to 9 were prepared with the compositions shown in Table 2 below. The units in Table 2 are% by weight.

Component (product name) Example 2 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Comparative Example 9 Awards Purified water 47.10 47.10 47.10 27.10 47.10 47.10 25.10 glycerin 6.00 6.00 6.00 6.00 6.00 6.00 6.00 Polysilicone-11 - - - - - - 2.00 Ethylenediaminetetraacetic acid disodium salt 0.20 0.20 0.20 0.20 0.20 0.20 0.20 Comparative Example 3 - - - 20.00 - - 20.00 Paid Glyceryl steararte (and) PEG-100 stearate
(lipomulse 165) 1.50 1.50 1.50 1.50 1.50 1.50 1.50 Glyceryl stearate
(Dub GMS) 0.70 0.70 0.70 0.70 0.70 0.70 0.70 Cetearyl alcohol
(lipocol SC-1618) 1.50 1.50 1.50 1.50 1.50 1.50 1.50 Sorbitan sesquioleate
(LipoSorb SQO) 1.00 1.00 1.00 1.00 1.00 1.00 1.00 Dipentaerythrityl Hexacaprate / Hexacaprate
(liponate (R) DPC-6) 2.00 2.00 2.00 2.00 2.00 2.00 2.00 Hydrogenated didecene
(silkflo362) 7.00 7.00 7.00 7.00 7.00 7.00 7.00 C12-C15 alkyl benzoate - - - 20.00 7.00 - 20.00 Dimethicone (and) Polysilicone-11 - - - - 1.00 1.00 - Isododecane (and) Isobutylmethacrylate / Bis-Hydroxypropyl Dimethicone Acrylate Copolymer - - - - 1.00 1.00 - Polysorbate 60
(TWEEN 60) - - - - 1.00 - - Titanium dioxide
(MT-100TV) - - - - 10.00 - - Example 1 20.00 - - - - - - Comparative Example 1 - 20.00 - - - - - Comparative Example 2 - - 20.00 - - 18.00 - Article 1 Silicone oil
(DOW CORNING® 200 FLUID, 10 CST) 2.00 2.00 2.00 2.00 2.00 2.00 2.00 Carbomer (and) water
(CARBOPOL 940 1% sol) 10.00 10.00 10.00 10.00 10.00 10.00 10.00 Add 2 Triethanolamine 0.10 0.10 0.10 0.10 0.10 0.10 0.10 Polyacrylate-13 (and) Polyisobutene (and) Polysorbate 20
(SEPIPLUS ™ 400) 0.40 0.40 0.40 0.40 0.40 0.40 0.40 Phenoxyethanol 0.50 0.50 0.50 0.50 0.50 0.50 0.50 Sum 100 100 100 100 100 100 100

The underwater type cosmetic composition of Example 2 and Comparative Examples 4 to 9 was prepared according to the following steps:

1) adding the components of the water phase portion of Table 2 to a separate reactor and stirring the solution at room temperature (25 ° C) to completely dissolve the components to prepare a water phase;

2) adding the respective components of the oil phase portion of Table 2 to a separate reactor and stirring the mixture at 70 ° C to completely dissolve the oil phase to produce an oil phase;

3) warming the above water and oil phase up to 80 ° C, gradually injecting the oil phase into the water phase, and emulsifying the mixture with a homomixer at 2500 rpm for 10 minutes while stirring;

4) The emulsion emulsified in the above step 3) was cooled to 50 ° C, and the ingredients of Addenda 1 and 2 of Table 2 were further added. The mixture was stirred at a speed of 2500 rpm for 5 minutes with a homomixer to prepare an underwater type cosmetic composition .

≪ Test Example 1 >

100 g each of the compositions of Example 2 and Comparative Examples 4 to 9 were taken at room temperature (25 占 폚) and at a high temperature (50 占 폚) in order to confirm the formulation stability of the cosmetic composition for underwater type comprising the inorganic ultraviolet- ) For 1 month, respectively, and then the stability was confirmed. The results are shown in Table 3 and FIG.

Test Items Example 2 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Comparative Example 9 Room temperature ○ X X ○ △ X ○ High temperature ○ X X ○ △ X ○

(?: Good,?: Fair, X: poor)

In Table 3 and FIG. 1, Comparative Example 4 including Comparative Example 1, which is an oil dispersion liquid containing a dispersant having an HLB value of 9 or more but not containing a film forming agent, and a dispersant having an HLB value of less than 9, In Comparative Example 5 including Comparative Example 2, which is an oil dispersion containing no oil, and Comparative Example 8 containing a film forming agent in addition to the composition of Comparative Example 5, the composition for an underwater type cosmetic composition of Example 2 according to the present invention It was confirmed that the formulation stability was greatly lowered.

In the case of Comparative Example 7 in which the components of the oil-based ultraviolet screening oil dispersion according to the present invention were directly mixed in the oil phase, the oil-based ultraviolet screening oil dispersion was separately prepared according to the present invention and mixed with the oil phase of the cosmetic composition It was confirmed that the formulation stability was lower than Example 2.

Therefore, the inorganic ultraviolet absorbent oil dispersion according to the present invention significantly improves the formulation stability when applied to an underwater type cosmetic composition as compared to an oil dispersion using a dispersant having no film former or having an HLB value of less than 9, It was confirmed that the formulation stability was improved as compared with the case where the components were directly incorporated into the cosmetic composition for underwater type.

Test Example 2 Water resistance evaluation test

In order to evaluate the water resistance of an underwater type cosmetic composition containing an inorganic sunscreen oil dispersion according to the present invention, reference is made to the method for measuring the SPF of water-resistant sunscreen (SPF) (SPF 290S Analyzer, Optometrics) in order to evaluate the UV-blocking index. Specifically, the test method was carried out in the room where the direct sunlight was blocked according to the following steps.

1) applying ² mg / cm ² of a UV-blocking cosmetic composition to a PMMA plate and drying in a natural state until the water completely volatilized (about 1 hour);

2) measuring the PMMA plate immediately after application and drying of step 1) with a UV detector (SPF 290S Analyzer);

3) immersing the PMMA plate of step 2) in water at 23 to 32 ° C for 20 minutes, taking it out, allowing it to dry naturally until the water completely volatilized (about 1 hour), and measuring it again with a UV detector (SPF 290S Analyzer) ;

4) repeating step 3) once more.

The results are shown in Table 4 (in-vitro SPF measurement evaluation result) and FIG. 2 (PMMA plate application visual evaluation result).

Example 2 Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Comparative Example 9 Immediately after application 46.12 36.46 9.43 42.38 32.26 28.49 45.43 After the first flooding and drying 34.68 10.43 8.87 9.24 15.84 12.57 6.64 After second flooding and drying 29.84 3.81 8.26 5.2 6.82 8.34 4.00

From the results of Table 4, it can be seen that, in Example 2 according to the present invention, the SPF value does not decrease significantly even after the application, the first flooding and drying, and the second flooding and drying, while the HLB value In the case of Comparative Example 4 including Comparative Example 1 which is an oil dispersion liquid containing a dispersant having a particle size of 9 or more but not containing a film forming agent, it is confirmed that the ultraviolet ray shielding effect is largely deteriorated through primary and secondary flooding, In Comparative Example 5, which is an oil dispersion liquid containing a dispersant having a content of less than 9 and containing no film-forming agent, the ultraviolet blocking effect is very low at all stages immediately after the application and after the first and second immersion there was.

In the case of Comparative Example 7 in which the components of the inorganic ultraviolet absorbent oil dispersion according to the present invention were directly mixed in the oil phase, the SPF immediately after the application was significantly lower than that of Example 2 according to the present invention, It was confirmed that the SPF value was significantly lowered by flooding and drying. Also, in the case of Comparative Example 8, which further included a film former in the composition of Comparative Example 5, all of the SPF values immediately after application, primary and secondary water immersion and drying were significantly lower than those of Example 2 according to the present invention It was confirmed that the ultraviolet shielding effect was greatly reduced.

Further, in the case of Comparative Example 6 including Comparative Example 3, which is a general aqueous dispersion, and Comparative Example 9 containing a film forming agent in addition to the composition of Comparative Example 6, the SPF value immediately after application was similar to that of Example 2 However, the SPF value fell to the lowest value after the first and second flooding and drying, and it was confirmed that the water resistance was almost zero.

In addition, in the results of FIG. 2, it was confirmed visually that the composition of Example 2 according to the present invention did not substantially wash away even after two times of immersion and drying, and that the water resistance was significantly improved as compared with Comparative Examples 4 to 9.

From the above results, it can be seen that the inorganic ultraviolet blocking oil dispersion according to the present invention is excellent in stability when applied to an underwater type cosmetic composition using a dispersant having an HLB value of 9 or more, , Water resistance and ultraviolet shielding effect can be greatly improved.

Claims (7)

An oil-based ultraviolet screening agent, a dispersion medium, a dispersant, and a silicone-based film-forming agent,
Wherein the dispersant has an HLB value of 9 or more. The ultraviolet screening composition according to claim 1,
At least one selected from the group consisting of titanium oxide, zinc oxide and iron oxide,
Is contained in an amount of 30 to 70% by weight based on the total weight of the oil dispersion. The method according to claim 1,
At least one oil selected from the group consisting of a hydrocarbon oil, an ester oil, a diester oil, a triglyceride oil, a carbonate oil, an alcohol oil and a silicone oil,
Is contained in an amount of 20 to 50% by weight based on the total weight of the oil dispersion. The method according to claim 1,
Wherein the dispersant is contained in an amount of 5 to 15% by weight based on the total weight of the oil dispersion. The method according to claim 1,
The silicone-based film-forming agent is contained in an amount of 5 to 15% by weight based on the total weight of the oil-based dispersion. An underwater type cosmetic composition comprising the oil-based sunscreen oil dispersion of claim 1. The method according to claim 6,
Wherein the inorganic ultraviolet blocking agent oil dispersion is contained in an amount of 10 to 40% by weight based on the total weight of the composition.

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