WO2020175789A1

WO2020175789A1 - Light-blocking cosmetic composition comprising cerium oxide

Info

Publication number: WO2020175789A1
Application number: PCT/KR2020/000171
Authority: WO
Inventors: 양희진; 권성호; 박명삼; 박천호; 김성용
Original assignee: 코스맥스 주식회사
Priority date: 2019-02-28
Filing date: 2020-01-06
Publication date: 2020-09-03
Also published as: KR20200105337A; KR102342903B1

Abstract

The present invention relates to a light-blocking cosmetic composition comprising cerium oxide. The cerium oxide in the light-blocking cosmetic composition according to one aspect is uniformly applied to each phase of an aqueous phase or an oil phase, and when the cosmetic composition is applied, the cerium oxide is uniformly present in any phase, and thus has a highly functional light-blocking effect compared with the content, without a separate existing organic-inorganic UV blocking component. In addition, the cosmetic composition is a formulation other than an existing water-in-oil formulation, has a light feeling of use without stickiness, and has an effect of improving cloudiness, irritation and dryness.

Description

2020/175789 1»（：1/10公020/000171 Specification

Title of the invention: Technical field of light blocking cosmetic composition containing cerium oxide

[1] It is about the light blocking cosmetic composition containing cerium oxide.

Background

四 Solar rays have visible rays, ultraviolet rays, infrared rays, etc., depending on their wavelength, and most of the infrared rays reaching the ground are near infrared rays. Ultraviolet rays, as is known, are

Near-infrared rays penetrate into the skin and promote aging. Near-infrared rays penetrate even deeper subcutaneous and fat layers that reach the deep dermis and cause collagen tissue destruction, active oxygen production, as well as vasodilation, leading to fundamental skin aging such as decreased elasticity. Also, blue light in the visible light area

It has higher skin penetration than UV rays, which can be a direct cause of photoaging.

[3] When the content of the existing organic UV blockers increases, they cause skin irritation, and the feeling of use is also sticky and oily. In addition, those used as the existing inorganic UV blockers have relatively few above problems, but titanium dioxide is cloudy. There was a problem that caused the phenomenon or had a high blueness and a stiff feeling of use, and zinc oxide also had heavy metal issues, including nanoparticle problems, so caution in use was always required.

[4] Recently, light blockers containing rare earth metal oxides such as cerium oxide have been developed to improve this problem (Korean Patent Registration No. 10-1861985), but most of them are manufactured in a water-in-oil type, so they feel heavy and frustrating.

Since cerium oxide is not evenly dispersed in the cosmetic composition, it is difficult to expect a high light blocking effect, and there has been a problem of poor formulation stability.

[5] Therefore, there is a need for a highly functional light blocker that exhibits excellent light blocking effect compared to the same content even though cerium oxide is applied in a non-water-in-oil formulation, but a separate organic-inorganic sun-blocking component is excluded.

Detailed description of the invention

Technical task

[6] One aspect is to provide a light-blocking cosmetic composition comprising a cerium oxide dispersion, the composition being an underwater type, a water dispersion type, or an oil dispersion type composition.

[7] The other aspect is that the dispersion of cerium oxide is mixed with water, oil or mixtures thereof.

It is to provide a method of manufacturing a cosmetic composition for light blocking comprising the step of mixing.

Problem solving means

[8] One aspect is a light-blocking cosmetic composition comprising a cerium oxide dispersion, the composition providing an underwater type, a water dispersion type, or an oil dispersion type composition. 2020/175789 1»（：1^1{2020/000171

[9] The term "cerium oxide" is an inorganic powder,

It means oxide, and may include 060 ₂ ,06 ₂ 0 ₃ , etc. For example, it may be. When cerium oxide according to one aspect is used as a light blocking component, conventional titanium dioxide, zinc oxide, etc. It can improve problems such as dryness or whiteness, which is pointed out as a disadvantage of ultraviolet ray screening agents using inorganic powder.

[1 The term "cerium oxide dispersion" refers to cerium oxide powder in an aqueous or oil phase.

It may mean a dispersed dispersion. In one embodiment, the cerium oxide dispersion may be a dispersion of surface-modified cerium oxide in an aqueous or oil phase. In one embodiment, the cerium oxide is polyacrylic acid,

It may be surface modified with one or more selected from the group consisting of glutamic acid, tromethamine, and stearic acid. The term "water dispersion type"

Cerium oxide” is a hydrophilic substance, for example,

It means dispersing at least one surface-modified cerium oxide selected from the group consisting of polyacrylic acid, glutamic acid, and tromethamine in an aqueous phase, such as purified water and polyhydric alcohols, and the term “water oxidation” Made

It can be used interchangeably with “cerium oxide”. Likewise, the term “oil dispersion type cerium oxide” means hydrophobic substances such as hydrophobic substances, for example, to enable oil dispersion.

Stearic acid, aluminum stearate, alumina,

Polyhydroxystearic acid, triethoxycaprylylsilane, and

Oil phase with at least one surface-modified cerium oxide selected from the group consisting of laurolylysine, for example, 012-15 alkylbenzoate, coco-caprylate caprate, octyldodecane, cetylethylhexanoate, iso It means that it is dispersed in nonyl isononanoate, cyclopentasiloxane, silicon, ester-based oil, etc., and can be used interchangeably with the term "oil-dispersed cerium oxide". The cerium oxide dispersion is prepared directly or or It may be supplied from the manufacturer and used. For example, it may be a dispersion prepared so that about 30% by weight of cerium oxide is dispersed in the aqueous phase. Or, it may be a dispersion prepared so that about 40% by weight of cerium oxide is dispersed in the oil phase. When a cerium oxide dispersion according to one aspect is used, formulation stability is higher than when cerium oxide is applied as the powder itself, and cerium oxide can be evenly distributed in the aqueous phase or oil phase, providing excellent light blocking compared to the same content of cerium oxide. The term “hydrophobic surface treatment cerium oxide” refers to a cerium oxide powder whose surface has been modified with a hydrophobic material to enable oil dispersion, and may be, for example, a surface modified with stearic acid.

[11] The term “light” can refer to a region of light that includes visible, ultraviolet, or infrared rays, for example blue.

There is a term

“Light blocking” can mean physically or chemically blocking light including visible rays, ultraviolet rays, and infrared rays. [12] The above “composition” may be of any one of an underwater type, a water dispersion type, and an oil dispersion type. The term “oil-in-water (0/W)” refers to the term “water type emulsion.

It is used interchangeably with “oil-in-water emulsion” and refers to a form in which the oil phase is dispersed in the water phase as one of the emulsification methods in which water and oil are mixed.

"Water-in-oil (W/0)" is used interchangeably with "water-in-oil emulsion" and is one of the emulsification methods in which water and oil are mixed. The term “water-dispersible” refers to a form in which solid particles or powders are dispersed in a liquid water phase, for example, it may be a form in which cerium oxide powder is dispersed in a water phase. “Old” refers to a form in which solid particles or powders are dispersed in a liquid oil phase, for example, cerium oxide powder may be dispersed in an oil phase.

[13] In one embodiment, when the composition is an underwater type, the cerium oxide may be present in an aqueous phase and an oil phase. Specifically, when the composition is an underwater type, the cerium oxide may be present at the same time in the aqueous phase and the oil phase. If the cerium oxide is present in the water phase and the oil phase at the same time in the underwater-type composition according to one aspect, the cerium oxide is uniformly present in any phase when the product is applied, and the light blocking effect of the same content compared to the same can be exhibited.

[14] In one embodiment, when the composition is water-dispersible, the cerium oxide may be present only in the aqueous phase. When the cerium oxide is present in the aqueous phase in a water-dispersible composition according to one aspect, cerium oxide is present when the product is applied. It is uniformly present in the whole composition, so it can exhibit the light blocking effect of the same content and high function.

[15] In one embodiment, when the composition is oil-dispersible, the cerium oxide may be present only in the oil phase. In the oil-dispersible composition according to one aspect, when the cerium oxide is present in the oil phase, when the product is applied, cerium oxide is present in the oil phase. It is uniformly present in the whole composition, so it can exhibit the light blocking effect of the same content and high function.

[16] In one embodiment, the composition may further include an aqueous component, an oily component, a powder, or a combination thereof in addition to the cerium oxide dispersion. The aqueous component may be 30 to 60% by weight based on the weight of the composition. It may be included as. The oil phase component may be included in an amount of 1 to 15% by weight based on the weight of the composition. The powder may not be included or may be included in an amount of 1 to 5% by weight based on the total weight of the composition. The cerium oxide dispersion is a desired degree of light blocking. Depending on the amount, it may be included in different amounts and may be included in trace amounts. However, if the cerium oxide dispersion is included alone as a light blocking component without a separate light blocking component, in general, W to give some light blocking effect to the total weight of the composition. It may be included in weight percent or more.

[17] The above "aqueous ingredients" are purified water, polyhydric alcohol, alcohol, water thickener, emulsification stabilizer, 2020/175789 1»（：1^1{2020/000171 May contain water-soluble emulsifiers, or other additives. The above “polyhydric alcohol” is also referred to as a polyol, and refers to an alcohol having two or more hydroxyl groups. The polyhydric alcohol is a polyhydric alcohol. Including those commonly used in the art, for example, the polyhydric alcohol is glycerin, mannitol, xylitol, sorbitol, glycols, such as butylene glycol, propylene glycol, diethylene glycol,

It may be dipropylene glycol, polyethylene glycol, etc. The "aqueous thickener" may be gellan gum, xanthan gum, cellulose gum, starch, montmorillonite, hectoria, bentonite, silicate, kaolin, zeolite, etc. The above "emulsification stabilizer" Is

(Poly) It is a composite material containing polymers such as acrylate, polyvinyl alcohol, polypropylene, etc. It has a thickening effect and may help stabilization separately from a surfactant. The "water-soluble emulsifier" is a polysorbate-based, polypropylene, etc. It can be alcohol-based, glyceryl-based, stearate-based, oleate-based, etc. The above “other additives” can be preservatives, flavors, metal ion inhibitors, anti-caking agents, metal salts, etc.

[18] The "oil-phase component" may include a surfactant, an organic ultraviolet ray blocker, an oil thickener, or oil and other oil-soluble substances. The "surfactant" is an emulsifying auxiliary or dispersing role separately from the water-soluble emulsifier. It may be, for example, acid, sorbitan, etc. The above "organic ultraviolet ray blocker"

Ethyl nuclear silmethoxycinnamate, ethyl nuclear silsalicylate,

Bis-ethylhexyloxyphenol methoxyphenyltreazine, benzophenone, paraanimobenzoic acid, butylmethoxydibenzoylmethane, octocrylene, 4-methylbenzylidene camphor,

It may include those commonly used as sunscreens in the relevant technical field, such as octylmethoxycinnamate. The “oil thickener” is wax, resin, or

As a thickener, caster wax, carnauba wax, jojoba wax, shea butter, etc.

Vegetable wax; Animal wax such as beeswax and lanolin; mineral waxes such as christening, paraffin, petrolatum; silicon wax or resin such as stearyl dimethicone and polysilicon; and the thickener may be acrylates, metal salts, The above “oil and other useful substances” are not limited as long as they can be used in cosmetic compositions to impart moisturizing power or fluidity, for example, trimethicone, dimethicone,

Silicone oils such as phenyltrimethicone, cyclohexasiloxane, and cyclopentasiloxane; hydrocarbon-based oils such as flowing paraffin, squalane, mineral oil, and triglycerin; Natural oils such as olive oil, macadamia nut oil, and sunflower oil;

Dipentaerythrityl nucleus 05-9 acid ester, 02-15 alkyl octanoate,

Myristylactate, cetylethylhexanoate, neopentylglycol dicaprate, cetyloctanoate, isopropylmyristate, octyldodecylmyristate, hexylaurate, di(02-03) alkylmaleate, myristylac Tate,

Octyldodecylstearoylstearate,diisotearylmaleate,

Pentaerythyl tetraethyl hexanoate, diglyceryl

）Can contain ester oils such as 2020/175789 1»（：1^1{2020/000171 There is.

[19] The above “powder” refers to other powders, inorganic ultraviolet ray blockers, hydrophobic surface treatment cerium

Oxide or cerium oxide may be included. The above “other powders” include talc, mica, synthetic mica, sericite, silica, silicon powder, boron powder, nylon powder, polymethacrylate powder, urethane powder, acrylate (co ）Polymer, polyethylene (co) polymer, organic pigment pigment, inorganic pigment pigment, pearl gloss pigment, etc. The above "inorganic ultraviolet ray blocker" can be titanium dioxide, zinc oxide, coated with silica, stearic acid, silicon, etc. Can be

[2 In this embodiment, the cerium oxide may be contained in an amount of 2 to 50% by weight based on the total weight of the composition. For example, 2 to 40% by weight, 2 to 30% by weight, 2 to 20% by weight, 2 to 10% by weight, 5 to 50% by weight, 5 to 40% by weight, 5 to 30% by weight, 5 to 20% by weight, 5 to 10% by weight, 10 to 50% by weight, 10 to 40% by weight, 10 to 10% It may be 30% by weight, 10 to 20% by weight, 20 to 50% by weight, 20 to 40% by weight, 20 to 30% by weight, 30 to 50% by weight, 30 to 40% by weight, 40 to 50% by weight. If the content of cerium oxide is less than 2% by weight, it is difficult to expect a light-blocking effect alone without a separate light-blocking component, and if it exceeds 50% by weight, the formulation stability is lowered.

[21] The composition may contain one or more cosmetically acceptable carriers in addition to the above-mentioned ingredients. Specifically, fatty substances, organic solvents, dissolving agents, thickening agents, gelling agents, emollients, antioxidants, suspensions. Agents, stabilizers, foaming agents, fragrances, surfactants, water, ionic or nonionic emulsifiers, fillers, sequestering agents and chelating agents, preservatives, vitamins, blocking agents, wetting agents, essential oils, dyes, pigments, hydrophilic or It can be prepared by containing a lipophilic activator, a lipophilic vesicle or any other ingredient commonly used in cosmetics, and an adjuvant commonly used in the cosmetic field. The blending amount of the above additional ingredients does not impair the purpose and effect of the present invention. Within the range, a conventional engineer can easily select, and the blending amount may be about 0.001 to about 30% by weight, specifically about 0.01 to about 10% by weight based on the weight of the composition.

[22] The above composition may be prepared in a cosmetic formulation conventionally manufactured in the art. Specifically, a solution, a suspension, an emulsion, a paste, a gel, a cream, a lotion, a powder, a soap, a surfactant-containing cleansing oil, a powder It can be formulated as a foundation, emulsion foundation, wax foundation, or spray. The product types are lip rice, lip cream, lipstick, lip gloss, hair stick, soft lotion, nutritional lotion, milk lotion, emulsion, serum, nutrition cream, moisture cream. ,Massage cream, essence, eye cream, cleansing cream, cleansing foam, cleansing water, pack, spray, powder, liquid foundation, or solid foundation. For example, sun cream, sun stick, sun lotion, sun gel. , Sun powder, sun cushion, or sun spray.

[23] 2020/175789 1»（：1/10公020/000171 Another aspect provides a method of manufacturing a light-blocking cosmetic composition comprising the step of mixing a cerium oxide dispersion with an aqueous phase, an oil phase or a mixture thereof.

In the above manufacturing method, cerium oxide, cerium oxide dispersion, light, light blocking, and composition are the same as described above.

If the composition is of the water-in-water type, mixing the aqueous component; adding water-dispersed cerium dioxide to the mixed aqueous-phase component; and emulsifying by adding a mixture of an oily component and oil-dispersed cerium dioxide to the mixture. Can be manufactured.

[27] When the composition is a water-dispersible type, mixing the aqueous component; It can be produced by adding water-dispersible cerium dioxide to the mixed aqueous component.

[28] When the composition is an oil-dispersed type, mixing the oil phase component; adding oil-dispersed cerium dioxide to the mixed oil phase component; and mixing alcohol, alcohol, and other additives.

In one embodiment, the cerium oxide dispersion may be obtained by dispersing surface-modified cerium oxide in an aqueous or oil phase. In one embodiment, the cerium oxide dispersion disperses the surface-modified cerium oxide into an aqueous or oil phase. In one embodiment, prior to the step of adding the cerium oxide dispersion to the aqueous phase, oil phase or mixture thereof, it may further include a step of dispersing the surface-modified cerium oxide into the aqueous phase or oil phase. . Alternatively, in one embodiment, before the step of adding the cerium oxide dispersion to the aqueous phase, oil phase, or mixture thereof, it may further include a step of surface-modifying cerium oxide. According to one aspect, the surface-modified cerium oxide Formulation stability can be improved through the pretreatment of oil-dispersion or water-dispersion.

]]] Since cerium oxide can be evenly distributed on the phase, 456 even with a small cerium oxide content.

222239 It can exhibit excellent light blocking effect, and therefore, it is effective to improve the feeling of use by eliminating the components of the existing organic/inorganic sunscreen.

30]

Another aspect provides the use of a cosmetic composition comprising a cerium oxide dispersion for the manufacture of a cosmetic for light blocking. The above cerium oxide, cerium oxide dispersion, light, light blocking, composition are as described above. .

Effects of the Invention

32] The light-blocking cosmetic composition according to one aspect is uniformly applied to each phase of the water or oil phase, and when applied, the cerium oxide is uniformly present in any phase, so it is highly functional compared to its content without a separate organic/inorganic UV blocking component. It has a light blocking effect. Also, it has a light feeling without stickiness as it is not a conventional water-in-oil formulation, and has the effect of improving whiteness, irritation, and dryness. 2020/175789 1»（：1^1{2020/000171 Forms for the implementation of the invention

[33] Hereinafter, the present invention will be described in more detail through examples. However, these

The examples are for illustrative purposes only, and the scope of the present invention is not limited to these examples.

[34]

[35] The following [Table 1] shows the specific components and contents of the cosmetic compositions of Examples 1 to 4 and Comparative Examples 1 to 8 below, and the specific manufacturing method is as follows.

[36]

2020/175789 1»（：1/10公020/000171

[37] [Table 1]

2020/175789 1»（：1^1{2020/000171

[38]

[39] Preparation of cerium oxide-containing oil-in-water cosmetic composition after water-dispersion and oil-dispersion, examples 1 and 2.

[4] After mixing all the components of the aqueous phase, water-dispersion type cerium oxide (water-oxidized cerium oxide) (Soulbrain Co., Ltd.), which is a dispersion liquid of about 30% by weight of cerium oxide, was mixed in the aqueous phase. , Oily ingredients and

A mixture of oil-dispersed cerium oxide (oil-dispersed cerium oxide) (Soulbrain), which is a dispersion of about 40% by weight of cerium oxide, is added and emulsified, and other powders are mixed to make an oil-in-water cosmetic composition. I did.

[41] 2020/175789 1»（：1/10公020/000171 Deep visual example 3. Manufacture of cerium oxide-containing moisture oxidizing paste composition after hydration

After mixing all the components of the aqueous phase, a water-dispersion type cerium oxide (Soul Brain Co., Ltd.), which is a dispersion liquid of about 30% by weight of cerium oxide in the aqueous phase, was mixed in the aqueous phase. After that, other powders were mixed to form a water-dispersible composition. Was manufactured

44]

45] Simulated Example 4. Preparation of cerium oxide-containing oil-dispersed funnel composition after oil-dispersion

46] After mixing all of the oily components, mix the oil-dispersed type cerium oxide (Soulbrain Co., Ltd.), which is a dispersion of 40% by weight of cerium oxide in the oil phase, and add alcohol, alcohol, and other additives. Other powders were mixed to prepare an oil-dispersed composition. Comparative Example 1. Manufacture of water-in-water cosmetic composition containing organic and inorganic UV blocking agents

In Comparative Example 1, a water-in-oil cosmetic composition was prepared by including organic and inorganic sunscreens instead of cerium oxide. Specifically, after mixing all of the aqueous components, the inorganic sunscreen was mixed with the aqueous phase. Thereafter, oil was added to prepare a water-in-oil cosmetic composition. It was emulsified and mixed with oily components including other powders and organic sunscreen to prepare a water-in-oil cosmetic composition.

50]

Comparative Example 2 Preparation of a water-in-oil cosmetic composition containing cetoxide after water and oil oxidation

52] In Comparative Example 2, a cosmetic composition was prepared by applying a water-in-oil formulation instead of water-in-water, water-dispersion, and oil-dispersion cerium oxide. Specifically, after mixing all of the aqueous components, the aqueous phase was mixed. Cerium oxide is about 30% by weight

]] Water-dispersion type cerium oxide (Soulbrain)

42353

444445555798 was mixed. Then, oil was added to emulsify, and other powders and oily components were mixed.

Mixing. A water-in-oil cosmetic composition was prepared by mixing the above mixture with an oil-dispersion type cerium oxide (Soul Brain Co.), a dispersion in which 40% by weight of cerium oxide is dispersed in the oil phase. Comparative Example 3 Preparation of oil-in-water cosmetic composition containing organic and inorganic UV blocking agents

In Comparative Example 3, an oil-in-water cosmetic composition was prepared by including organic and inorganic sunscreens instead of cerium oxide. Specifically, after mixing all of the aqueous components, the inorganic sunscreen was mixed with the aqueous phase. Then, oil was added to prepare an oil-in-water cosmetic composition. After emulsification, an oil-in-water cosmetic composition was prepared by mixing oily components including other powders and organic UV blockers.

56;

57; Comparative Example 4. Preparation of a chemical composition in water containing an organic ultraviolet ray blocker

58 Comparative Example 4 is an oil-in-water cosmetic by including an organic UV blocker instead of cerium oxide 2020/175789 1»（：1^1{2020/000171 The composition was prepared. Specifically, after mixing all of the aqueous components, oil was added to emulsify, and other powders and oily components including organic UV blockers were mixed. An oil-in-water cosmetic composition was prepared.

[59]

[6] Comparative Example 5. Manufacture of Oil-in-Water Cosmetic Composition Containing Inorganic UV Protection Agent

In Comparative Example 5, an inorganic UV blocker was included instead of cerium oxide to prepare an oil-in-water cosmetic composition. Specifically, after all of the aqueous components were mixed, the inorganic sunscreen was mixed with the aqueous phase. Then, oil was added. And emulsified, and other powders and oily components were mixed to prepare an oil-in-water cosmetic composition.

[62]

[63] Comparative Example 6. Preparation of oil-in-water cosmetic composition containing cerium oxide powder

[64] Comparative Example 6 includes cerium oxide powder instead of dispersed cerium oxide

An oil-in-water cosmetic composition was prepared. Specifically, after all of the aqueous components were mixed, cerium oxide powder was mixed in the aqueous phase. After that, oil was added to emulsify, and other powders and oil components were mixed to form an oil-in-water cosmetic composition. Was prepared.

[65]

[66] Comparative Example 7. Preparation of oil-in-water cosmetic composition containing cetoxide after water oxidation

[67] Comparative Example 7 is an oil-in-water formulation of water-dispersed cerium oxide instead of water dispersion.

Specifically, after mixing all of the aqueous components, water-dispersion type cerium oxide (Soulbrain Co., Ltd.), which is a dispersion in which about 30% by weight of cerium oxide is dispersed in the aqueous phase, was mixed in the aqueous phase. Thereafter, oil was added to emulsify, and other powders and oily components were mixed to prepare an oil-in-water cosmetic composition.

[68]

[69] Comparative Example 8. Preparation of oil-in-water cosmetic composition containing cerium oxide after oil dispersion

0] Comparative Example 8 uses oil-dispersed cerium oxide as an oil-in-water formulation instead of oil dispersion.

Specifically, after all the aqueous components were mixed, oil was added to emulsify, and other powders and oil components were mixed. In the mixture, cerium oxide was dispersed in the oil phase in an amount of about 40% by weight. Oil-in-water cosmetic composition was prepared by mixing oil-dispersed type cerium oxide (Soul Brain Co.)

One]

[72] Checking the effect

3] In order to confirm the effect of the cosmetic material containing cerium oxide dispersed or oil-dispersed, Examples 1 to 4 and Comparative Examples 1 to 8

The effect and the near-infrared blocking effect were compared and measured at-and-respectively. The near-infrared blocking effect was applied to the skin of the inside of the human arm. The spectral reflectance before and after 2020/175789 PCT/KR2020/000171 was measured and evaluated with a spectrophotometer (NIR Spectrophotometer, ASD Inc., USA).

4] The following [Table 2] is a result of comparative measurement of the light blocking effect of Examples 1 to 4 and Comparative Examples 1 to 8.

P5] [Table 2]

6] As a result, as shown in Table 2, Examples 1 to 4 and Comparative Example 2 containing water-dispersed cerium oxide and/or oil-dispersed cerium oxide were light compared to Comparative Example 6 containing cerium oxide powder. It was confirmed that the blocking effect appeared high.

7] In addition, Example 3 containing water-dispersed cerium oxide in a water-dispersion form showed higher light blocking effect compared to Comparative Example 7 containing water-dispersed cerium oxide in an oil-in-water form, and similarly oil-dispersed cerium oxide Example 4 containing oil-dispersed cerium oxide in the oil-dispersed form exhibited a higher light blocking effect compared to Comparative Example 7 containing oil-dispersed cerium oxide in the oil-in-water form, and also included water-dispersed cerium oxide and oil-dispersed cerium oxide. It was confirmed that Example 1 or 2 contained in the oil-in-water form had a higher light blocking effect compared to Comparative Examples 7 or 8.

8] In addition, it was confirmed that Examples 1 to 4 had the same or higher light blocking effect compared to Comparative Examples 1 and 3 to 5 including the existing organic-inorganic ultraviolet ray blocking agents.

9] The result of comparison with Comparative Example 6 of Examples 1 to 4 and Comparative Example 2 is the same amount 2020/175789 1»（：1^1{2020/000171 In applying cerium oxide, if cerium oxide is applied as a dispersion instead of directly applying it in a powder state, the cerium oxide can be distributed evenly without clumping, thereby enhancing the light blocking effect. Means there is.

[8] In addition, the result of comparison with Comparative Examples 7 or 8 of Examples 1 to 4 is the same amount

In the application of the cerium oxide dispersion, it means that the light blocking effect can be enhanced by applying the cerium oxide dispersion so that it is evenly included in the two phases instead of applying the cerium oxide dispersion to only one of the water or oil phases. Specifically, as in Comparative Examples 7 or 8, When two phases exist (oil-in-water), if cerium oxide is dispersed in only one of the water phase or oil phase, the light blocking effect is inferior because cerium oxide cannot be evenly distributed in all phases, but only one phase exists as in Examples 3 or 4 If cerium oxide is dispersed in the phase (water dispersion or oil dispersion), cerium oxide can be evenly distributed in the phase, and cerium in both the water phase and the oil phase when two phases exist (oil in water) as in Example 1 or 2 Dispersing the oxide

It can be seen that cerium oxide can be evenly distributed in all phases, thereby enhancing the light blocking effect.

[81] In addition, from the comparison results of Examples 1 to 4 and Comparative Examples 1 and 3 to 5

It can be seen that when cerium oxide is applied as a dispersion, it has the same or superior light blocking effect than the case of including the existing organic/inorganic UV blocker.

[82]

[83] Examination Example 2. Confirmation of the Examination Child

[84] In order to confirm the stability of a cosmetic composition containing cerium oxide that has been water-dispersed or oil-dispersed through pretreatment, the UV-blocking component in Examples 1 to 4 and Comparative Examples 1 to 8 is oil-in-water, water-in-oil, water dispersion. In addition, it was observed with the naked eye to see if it was stably contained in each formulation of oil dispersion without sedimentation or aggregation.

[85] The following [Table 3] is a comparative observation of the stability of Examples 1 to 4 and Comparative Examples 1 to 8

It is the result.

[86] [Table 3]

[87] As a result, as shown in Table 3, Examples 1 to 4 and Comparative Example 2 containing water-dispersed cerium oxide and/or oil-dispersed cerium oxide were compared to Comparative Example 6 containing cerium oxide powder. It was confirmed that the formulation stability appeared high.

[88] In addition, water-dispersed cerium oxide and oil-dispersed cerium oxide It was confirmed that Examples 1 and 2 containing the formulation of 2020/175789 1» (: 1^1{2020/000171) showed higher formulation stability compared to Comparative Example 8 containing the oil-dispersed cerium oxide in the oil-in-water formulation.

In addition, it was confirmed that Examples 1 to 4 had formulation stability equal to or higher than those of Comparative Examples 1 and 3 to 5 including the existing organic-inorganic ultraviolet ray blockers.

[9] The result of comparison with Comparative Example 6 of Examples 1 to 4 and Comparative Example 2 is the same

In the application of cerium oxide, it means that cerium oxide can be stably contained in the formulation without clumping, if cerium oxide is applied as a dispersion instead of directly applied in a powder state.

[91] In addition, the result of comparison with Comparative Example 8 of Examples 1 to 4 is

When the cerium oxide dispersion is applied, it can be seen that the inclusion of cerium oxide in both the oil phase and the aqueous phase is a way to stably contain cerium oxide without sedimentation or aggregation.

[92] In addition, from the comparative results of Examples 1 to 4 and Comparative Examples 1 and 3 to 5

It can be seen that when cerium oxide is applied as a dispersion, it has the same or better formulation stability than the case of including the existing organic/inorganic UV blocker.

[93]

[94] Experimental example 3. Usability evaluation

[95] To check whether the light-blocking composition containing cerium oxide has the effect of improving stickiness, dryness, and cloudy sensation compared to the light-blocking composition containing an organic-inorganic UV-blocking agent or a water-in-oil type light-blocking composition. , A score of 5 was evaluated for men and women between the ages of 25 and %, and a patch test in which a certain amount of the composition of Examples 1 to 4 and Comparative Examples 1 to 8 was applied to the arm to confirm whether there was no irritation. Was performed.

[96] The following [Table 4] is a result of comparative observation of the irritation properties of Examples 1 to 4 and Comparative Examples 1 to 8.

2020/175789 1»（：1^1{2020/000171

[97] [Table 4]

[98] As a result, as shown in Table 4, when an organic sunscreen agent is included as in Comparative Example 1, Comparative Example 3, and Comparative Example 4, there may be relatively slight irritation, and the stickiness becomes severe. It was confirmed that when the inorganic ultraviolet ray blocker was included as in Example 1, Comparative Example 3, and Comparative Example 5, the whiteness and dryness became severe. However, as in Examples 1 to 4 and Comparative Examples 7, 8, the ultraviolet ray blocking component was used. When cerium oxide was included, it was confirmed that there is an effect of improving irritation, stickiness, dryness, and whiteness.

In addition, in the case of the water-in-oil formulation as in Comparative Example 1 and Comparative Example 2, it was confirmed that the stickiness became severe compared to Examples 1 to 4.

[10] In addition, it was confirmed that when cerium oxide was applied directly in a powder state as in Comparative Example 6, it was relatively dry compared to Examples 1 to 4.

[101] The results of comparison with Examples 1 to 4 and Comparative Examples 1 and 3 to 5 of Comparative Examples 7 and 8 are

When cerium oxide is used as a sunscreen component, it is possible to improve the irritation and stickiness pointed out as a disadvantage of organic sunscreens.

It can improve the dryness or cloudiness pointed out by the disadvantages of inorganic UV blockers such as titanium dioxide, which means that the feeling of use is superior to products composed of conventional organic and inorganic UV blockers. 2020/175789 1»（：1^1{2020/000171

[102] In addition, from the comparison results of Comparative Examples 1 and 2 of Examples 1 to 4, the feeling of use indicated as a problem due to the application of the rare earth metal as a water-in-oil formulation is heavy and

The frustration is that it can be improved if applied to oil-in-water, water dispersion, or oil dispersion formulations.

In addition, it can be seen from the comparison results with Comparative Example 6 of Examples 1 to 4 that dryness is improved when cerium oxide is applied as a dispersion instead of directly applied in a powder state.

Claims

2020/175789 1»（：1/10公020/000171 Claims

[Claim 1] A cosmetic composition for light blocking comprising a cerium oxide dispersion, the above

The composition is a water-in-water type, water dispersion type, or oil dispersion type composition.

[Claim 2] The composition according to claim 1, wherein the cerium oxide dispersion is obtained by dispersing surface-modified cerium oxide in an aqueous or oil phase.

[Claim 3] In claim 2, the cerium oxide is polyacrylic acid,

Surface modification with one or more selected from the group consisting of glutamic acid, tromethamine, stearic acid, aluminum stearate, alumina, polyhydroxystearic acid, triethoxycaprylylsilane, and laurolysine The composition.

[Claim 4] In claim 1, when the composition is an underwater type, the

Cerium oxide is a composition that exists in the aqueous and oil phases.

[Claim 5] In claim 1, the composition is an aqueous component, an oil component, a powder, or

A composition that further contains a combination of these.

[Claim 6] In claim 1, the cerium oxide is 2 to 2 based on the total weight of the composition.

A composition containing 50% by weight.

[Claim 7] Mixing cerium oxide dispersion with water, oil, or mixtures thereof

Light blocking cosmetic composition manufacturing method comprising the steps.

[Claim 8] The manufacturing method according to claim 7, wherein the cerium oxide dispersion is obtained by dispersing surface-modified cerium oxide in an aqueous or oil phase.

[Claim 9] In claim 7, the cerium oxide dispersion is surface-modified

A manufacturing method obtained by dispersing cerium oxide in an aqueous or oil phase.