TWI771377B - Cosmetics composition for blue light filtering and ultraviolet light blocking - Google Patents

Abstract

The present specification provides an oil-in-water cosmetic composition for blue light filtering and ultraviolet light blocking in which a hydrophobic visible light blocking agent is homogeneously dispersed in an aqueous phase and a method of maintaining the stability of such a composition, and this makes it possible to meet the needs of consumers who are interested in this field and to promote the development of related industries.

Description

Cosmetic composition for blue light filtering and UV blocking

This specification relates to a stable cosmetic composition for blue light filtration and UV light blocking, wherein the hydrophobic visible light blocking agent is homogeneously dispersed in the aqueous phase.

Solar energy enters the earth mainly as electromagnetic waves, and these electromagnetic waves include radio waves, microwaves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays in order from the longest wavelength. Numerous sunscreen products developed to protect the skin from the sun's rays (solar energy) focus on preventing skin damage caused by ultraviolet light in the UVB region (290 to 320 nm) and UVA region (320 to 400 nm). Little is known about the effects of light with wavelengths other than ultraviolet light (eg, visible light) on human skin, but in recent years, research into the adverse effects of violet and blue light on skin has been conducted.

Specifically, blue light has been reported to regulate the proliferation and differentiation of keratinocytes and skin-derived endothelial cells, and violet light has been reported to reduce keratinocyte differentiation and delay recovery of damaged skin barriers.

In addition to the effects on the skin reported above, blue light not only inhibits the secretion of sleep-inducing melatonin and increases the secretion of wake-inducing serotonin, thereby causing sleep disorders, but also directly reaches the retina and induces melanin production, resulting in dark skin. Sink and cause pigmentation.

Such violet light and blue light are intensively emitted from LED displays and LED lighting of smart phones, notebook computers, monitors and the like, and contact with such violet and blue light is inevitable in the living environment of modern society, and therefore attempts have been made to use the These violet and blue light are blocked in various ways. However, research on the blocking of such harmful light has not been sufficiently carried out in the field of cosmetics. In particular, due to the nature of cosmetic and sunscreen products, it is also important to maintain formulation stability while blocking harmful light, and research and efforts are therefore required to address these issues.

[Citation List] [Non-Patent Literature] [Non-Patent Literature 1] THE JOURNAL OF BIOLOGICAL CHEMISTRY, Vol. 280, No. 22, pp. 21061-21066, published on June 3, 2005, "Blue Light Induces Mitochondrial DNA Damage and Free Radical Production in Epithelial Cell"

[technical problem]

The purpose of this specification is to provide a stable cosmetic composition for blocking harmful light and a method for maintaining the stability of the composition. The stable cosmetic composition is a stable oil-in-water cosmetic composition for blocking visible light, wherein the hydrophobic The visible light blocker is homogeneously dispersed in the aqueous phase. [Problem solution]

In order to achieve the above object, in one aspect, the present invention provides a cosmetic composition for blocking visible light, the cosmetic composition comprising: an oil phase part, comprising an ultraviolet light blocker and silicone oil; a water phase part, comprising a phosphoric acid selected from the group consisting of one or more of the group consisting of ester surfactants, glutamic acid surfactants, and urethane surfactants, and a thickening agent; and a hydrophobic visible light blocker, homogeneously dispersed in the aqueous phase fraction .

In another aspect, the present invention provides a method for enhancing the stability of a formulation of a cosmetic composition for blocking visible light, the cosmetic composition comprising: an oil phase portion comprising a UV light blocker and a silicone oil; an aqueous phase portion, comprising one or more selected from the group consisting of phosphate surfactants, glutamic acid surfactants, and urethane surfactants, and a thickening agent; and a hydrophobic visible light blocker, homogeneously dispersed in In the water phase part, the method includes adjusting the content of the surfactant to 0.5% to 2% by weight relative to the total weight of the composition in the cosmetic composition. [Advantageous Effects of Invention]

The present specification can provide a stable oil-in-water cosmetic composition for blocking visible light, and a method for maintaining the stability of the composition, in which a hydrophobic visible light blocking agent is homogeneously dispersed in an aqueous phase, and this makes it possible to Meet the needs of consumers interested in this field and promote the development of related industries.

In this specification, the term "visible light" refers to light perceivable by the human eye, and generally includes light in the wavelength range (380 to 800 nm) visible to the human eye among various electromagnetic waves. In general, blue light is light having a wavelength of 380 to 500 nm and refers to light with shorter wavelengths and higher energy of visible light that an individual can see, that is, light that reaches the retina, and more specifically, can be The region of 380 to 430 nm is divided into the violet region and the region of 430 to 500 nm is divided into the blue region.

In this specification, the term "oil dispersibility" refers to the property or degree to which a substance is favorably dispersed in a grease or oil component, and is a concept included in hydrophobicity. In the same manner, "water dispersibility" refers to the property or degree to which a substance is favorably dispersed in water or water-soluble substances, and is a concept included in hydrophilicity.

In this specification, the term "coloring component" refers to colorants, pigments or other substances capable of exhibiting color. The coloring component includes pigment, and preferably can be a pigment component, which can be used as a raw material for cosmetics. The coloring component may be one or more selected from the group consisting of titanium dioxide, micro-titanium oxide (micro-TiO ₂ ), zinc oxide (ZnO), micro-zinc oxide (micro-ZnO), iron oxide (FeO ( II), Fe ₂ O ₃ (III), Fe ₃ O ₄ (IV)), alumina (alumina, Al ₂ O ₃ ), barium sulfate (BaSO ₃ ), PMMA (polymethyl methacrylate; polymethyl methacrylate) ), silica, nylon, polyurethane, ultramarine blue, pearl, synthetic mica, mica, talc, kaolin, sericite and boron nitride, but not limited thereto.

In this specification, the term "thickener" refers to substances that increase the viscosity of solutions, compositions and the like, also known as tackifiers or viscosity modifiers, and may be referred to as thickeners because they appear viscous And it feels thick.

In this specification, the term "emulsion" is one of the most commonly used formulation systems in the cosmetic industry, and means a system in which the oil phase and the aqueous phase are uniformly dispersed by means of emulsification techniques. Such emulsions can be prepared in various forms depending on the composition of the continuous phase, and can be prepared as water-in-oil (W/O), oil-in-water (O/W), water-in-oil-in-water (W/O/W), or oil Oil-in-water (O/W/O) form. In this specification, the above-mentioned form is not particularly limited, but an oil-in-water (O/W) form may be preferable.

In the present specification, the term "homogeneous mixing" is also referred to as homogenization and includes manufacturing raw materials in a state of being homogeneously mixed in an emulsion or solution by using a homomixer or a homogenizer.

In this specification, the term "silicone oil" refers to liquid silicone resins and mixtures thereof having a relatively low degree of polymerization. There are volatile silicone oils and non-volatile silicone oils, and the volatile silicone oils include one or more of linear polysiloxane oils or cyclic polysiloxane oils, and the non-volatile silicone oils include those selected from the group consisting of One or more of the group: Dimethicone, Phenylsiloxane, Alkylmethylsiloxane, Dimethicone, Cyclomethicone, Dimethicone Oxyalkanols, dimethicone polyols, polysiloxane elastomers and polysiloxane resins.

In this specification, the term "anionic surfactant" refers to a surfactant having a moiety to be ionized and which exhibits surface activity when dissolved in water to become an anion in the surfactant. Surfactants can be divided into nonionic surfactants (surfactants that do not dissociate even in aqueous solutions because the surfactants do not have ionized atomic groups in the molecule), cationic surfactants (atoms that dissolve in water and dissociated into cationic surfactants that exhibit surface activity), anionic surfactants, and amphoteric surfactants (surfactants having both cationic and anionic groups in the same molecule).

In this specification, the term "phosphate ester surfactant" refers to a surfactant containing phosphate ester in its chemical structure, and the term "glutamic acid surfactant" refers to a surfactant containing glutamic acid in its chemical structure , and the term "urethane surfactant" refers to a surfactant that includes a urethane in its chemical structure.

In this specification, the term "oil phase fraction" refers to an aggregated fraction of an oil-containing substance, a mixture thereof, or the like, and may include an aggregated fraction of mixed or added raw materials, which may be mixed or dispersed in oil or a mixture thereof. Among these. Meanwhile, the term "aqueous phase fraction" refers to an aggregated fraction of a water-containing substance, a water-soluble substance, a mixture thereof, or the like, and may include an aggregated fraction of mixing or adding a raw material, which may be mixed with water, soluble, or the like. Substances in water, mixtures thereof or the like are mixed or dispersed in these.

In this specification, unless otherwise defined, % refers to % by weight.

So far, no O/W emulsion products have been identified in which the hydrophobic visible light blocker is homogeneously dispersed and stabilized in the aqueous phase, and in particular, there are no O/W formulations that have been made to achieve the stability of the O/W formulation and have a complexion at the same time Correction effect in the case of products. This is because it is very difficult to maintain the stability of the formulation as an emulsion cosmetic while homogeneously dispersing the hydrophobic visible light blocker in the aqueous phase. There is an urgent need to provide a composition that can effectively block harmful light while simultaneously improving the stability of O/W formulations, and thus can be used as an actual cosmetic product when frequently exposed to harmful light, and thus takes into account consumers concerns, but so far they have not been resolved.

In the case where the O/W emulsion formulation contains a hydrophilic visible light blocker and specifically titanium dioxide with a surface treated with a water dispersible material, when the O/W emulsion formulation is thickened with most of the oil phase to be used When used together with a thickener such as carbomer-based or acrylate-based thickeners, an excessive increase in viscosity, gelation, and powder agglomeration will be induced, and the formulation will become very unstable, and thus the O/W emulsion cannot be The formulations are made into cosmetic products and used. Meanwhile, in the case where the O/W emulsion formulation contains a hydrophobic visible light blocker and, in particular, titanium dioxide having a surface treated with an oil-dispersible (or hydrophobic) substance, there is a disadvantage that it is difficult to disperse the hydrophobic visible light blocker in the in the aqueous phase and it is not possible to ensure the stability of the formulation.

The composition can be made into a better cosmetic composition, especially while effectively maintaining the stability of the O/W emulsion formulation containing the hydrophobic visible light blocker, while also achieving the cosmetic effect of skin tone correction. This is because skin tone correction is also required as a complex function of cosmetic products for blocking harmful light. Manufacturing cosmetic products that maintain formulation stability over long periods of time while simultaneously achieving detrimental light blocking and skin tone correction has been one of the long-standing challenges in the art.

In the present invention, it has been confirmed that hydrophobic visible light blockers, especially inorganic powders (eg, titanium dioxide) having a surface treated with a hydrophobic substance, can effectively block harmful light (especially blue and violet light), and the arrangement is effective by this And measures to stabilize O/W emulsion formulations for a long time by homogeneous dispersion in an aqueous phase, and provide cosmetic compositions of such O/W emulsion formulations and methods for enhancing the formulation stability of such compositions. The present invention intends to simultaneously exert the blocking effect of harmful light (including ultraviolet light and visible light) and the skin color correction effect, and maintain the stability of the formulation for a long time, so the present invention is also an invention that solves the long-standing unsolved problems in the art.

In one aspect, the present invention may be a cosmetic composition for blocking visible light, the cosmetic composition comprising: an oil phase part comprising an ultraviolet light blocker and a silicone oil; a water phase part comprising a phosphate surfactant selected from the group consisting of , one or more of the group consisting of a glutamic acid surfactant and a urethane surfactant, and a thickening agent; and a hydrophobic visible light blocker, dispersed homogeneously (eg, in the form of emulsion particles) in the water phase. In one embodiment, the particle size of the dispersed emulsion may be 0.1 to 20 μm as an average diameter when measured using an optical microscope. In another embodiment, the average diameter may be 0.1 μm or greater, 0.5 μm or greater, 0.8 μm or greater, 1 μm or greater, 1.2 μm or greater, 1.5 μm or greater, 2 μm or greater larger, 3 μm or larger, 4 μm or larger, 5 μm or larger, 7 μm or larger, 9 μm or larger, 12 μm or larger, 15 μm or larger, or 18 μm or larger big. Additionally, the average diameter can be 20 μm or less, 18 μm or less, 15 μm or less, 13 μm or less, 10 μm or less, 8 μm or less, 6 μm or less, 4 μm or less, 2 μm or less, 1 μm or less, 0.8 μm or less, 0.5 μm or less, or 0.2 μm or less. In yet another embodiment, the average diameter may be 1 to 5 μm.

In another aspect, the present invention provides a method for enhancing the stability of a formulation of a cosmetic composition for blocking visible light, the cosmetic composition comprising: an oil phase portion comprising a UV light blocker and a silicone oil; an aqueous phase portion, comprising one or more selected from the group consisting of phosphate surfactants, glutamic acid surfactants, and urethane surfactants, and a thickening agent; and a hydrophobic visible light blocker, homogeneously dispersed in In the water phase part, the method includes adjusting the content of the surfactant to 0.5% to 2% by weight relative to the total weight of the composition in the cosmetic composition.

According to an embodiment, the UV light blocker may be one or more of an organic UV light blocker or an inorganic UV light blocker.

According to one embodiment, the UV light blocker may be one or more selected from the group consisting of: ethylhexyl methoxycinnamate, isoamyl p-methoxycinnamate, ethyl salicylate Ethylhexyl, Diethylhexyloxyphenol Methoxyphenyl Triazine, Diethylamino Hydroxybenzyl Hexyl Benzoate, Octyl Methoxycinnamate, Octyl Cyanobiphenyl Acrylate, Humor Salsyl ester, avobenzone, butylmethoxydibenzoylmethane, oxybenzone, octyltriazinone, ethylhexyltriazinone, menthyl anthranilate, phenylbenzimidazole sulfonic acid and 3,4-methylbenzylidene camphor. In addition, according to another embodiment, the inorganic UV light blocking agent may be selected from the group consisting of titanium dioxide, zinc oxide and iron oxide.

According to another embodiment, the silicone oil may be one or more selected from the group consisting of silicone oils including cyclomethicone, dimethicone, cyclopentasiloxane, and cyclohexylsiloxane . Preferably, the silicone oil may be one or more of cyclopentasiloxane or cyclohexylsiloxane.

According to another embodiment, hydrocarbon oils including squalane or mineral oil may be used; including isopropyl palmitate, 2-octyldodecyl myristate, isopropyl myristate, or salicylic acid Ester oils of butyl octyl ester; and vegetable oils including castor oil, olive oil or jojoba oil instead of silicone oil.

As surfactants that can be used in compositions according to one aspect of the present invention, there are anionic surfactants, such as sulfates, sulfosuccinates, sugar salts, phosphates, isethionates, bran Amino acid salts and taurates; amphoteric surfactants such as betaine, sulfobetaine and amphoacetate; nonionic surfactants such as polyoxyethylene sorbitan fatty acid esters, polyoxyethylene (hardened) Castor oil, glycerol fatty acid esters, sorbitol fatty acid esters, sucrose fatty acid esters, alkyl amides, alkyl glucosides and carbamate surfactants (interfaces with carbamates in their chemical structures active agent, preferably inulin lauryl carbamate); and cationic surfactants, such as N-alkyldiaminoethylglycine, and these may be used alone or in two or more A mixture of species is used. Preferably, it can have phosphate, sulfate, glutamate or citrate as a hydrophilic group, sodium, potassium or ammonium as a counter ion, and usually has a C2-C24 aliphatic alkyl group as a hydrophobic group. Surfactants are used as anionic surfactants.

According to another embodiment, the surfactant may be a phosphate surfactant or a glutamic acid surfactant, and a urethane surfactant (a surfactant containing a urethane in its chemical structure, Preferably, inulin lauryl carbamate) replaces the anionic surfactant. Preferably, the surfactant can be any of potassium cetyl phosphate, aluminum isostearyl glycerophosphate, sodium lauryl sulfate, sodium stearyl glutamate or inulin lauryl carbamate. Alternatively, and more preferably, it may be potassium cetyl phosphate. By using such materials, it is possible to disperse the hydrophobic visible light blocking agent having a visible light blocking effect in the water phase of the O/W emulsion formulation efficiently and homogeneously, and thus it is possible to ensure the stability of the O/W emulsion formulation for a long time .

The cosmetic composition according to one aspect of the present invention may further comprise one or more emulsifiers in addition to the components described above. For example, the cosmetic composition may further comprise one or more emulsifiers selected from the group consisting of: lecithin, hydrogenated lecithin, lysolecithin, hydrogenated lysolecithin, polysorbate 60, PEG-40 hard Fatty acid ester, octyl dodeceth-25, cetearyl ether-20, PEG-20 glyceryl isostearate, polyglyceryl-3-methyl glucose distearate, cetyl Wax stearyl glucoside and polyglyceryl-10 stearate, but not limited thereto. The emulsifier to be further included may be included in 0.01% to 10% by weight with respect to the total weight of the cosmetic composition. When the content is less than 0.01% by weight, it is difficult to achieve the purpose of emulsification, and when the content exceeds 10% by weight, skin irritation may be caused.

According to another aspect of the present invention, the thickener may be one or more aqueous phase thickeners selected from the group consisting of: carbomer, polyacrylamide, acryldimethyltaurine Ammonium-VP copolymers, sanxian gum, cellulose ethers, polyethylene derivatives, alginates, polyacrylates and any mixtures of the above.

According to an embodiment, one or more of the water phase or the oil phase may further comprise a thickening agent. For example, the thickening agent may be a species selected from the group consisting of sodium acrylate copolymers, crosslinked or non-crosslinked acrylic acid polymers, especially polyacrylic acid crosslinked with multifunctional agents, cellulose derivatives ( For example, methyl cellulose, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, carboxymethyl cellulose or carboxymethyl cellulose), sodium salts of cellulose derivatives, spermaceti Cetyl stearyl alcohol, oxyethylated cetearyl alcohol containing ethylene oxide, guar gum, sanshin gum, and combinations thereof.

According to one aspect of the present invention, the thickener may be included in the overall composition at 0.001% to 20.0% by weight.

According to another embodiment, the hydrophobic visible light blocker may be an inorganic powder with a hydrophobic treated surface.

According to another embodiment, the inorganic powder may comprise one or more selected from the group consisting of titanium dioxide, micro-titanium oxide (micro-TiO ₂ ), zinc oxide (ZnO), micro-zinc oxide (micro-ZnO), Iron Oxides (FeO (II), Fe ₂ O ₃ (III), Fe ₃ O ₄ (IV)), Alumina (Alumina, Al ₂ O ₃ ), Barium Sulfate (BaSO ₃ ), Silica (Silica) , SiO ₂ ), talc, kaolin, sericite and mica. Preferably, the inorganic powder may be titanium dioxide.

According to another embodiment, the surface treatment may be performed using one or more selected from the group consisting of: dimethylsiloxane, methylpolysiloxane, substituted octylosilane, lauryl Lysine, Disodium Stearate Glutamate, Sodium Myristyl Glutamate, Silica, Bauxite and Aluminum Hydroxide. Harmful light blocking effects and at the same time complexion correcting effects may be obtained by such surface treatments.

According to another embodiment, the hydrophobic visible light blocker or inorganic powder with a hydrophobic treated surface may be titanium dioxide coated with aluminum hydroxide and triethoxyoctylsilane.

According to yet another embodiment, the content of the hydrophobic visible light blocker may be 0.5% to 5% by weight relative to the total weight of the composition. When the content is less than 0.5 wt %, the coloring effect and visible light blocking effect are weakened, while when the content exceeds 5 wt %, the dispersion in the formulation is not smooth and the formulation stability is thus significantly deteriorated. The amount of the hydrophobic visible light blocking agent may be 0.5 wt% or more, 0.8 wt% or more, 1 wt% or more, 1.2 wt% or more, 1.4 wt% or more, 1.6 wt% or more, 1.8 wt% or more, 2 wt% or more, 2.2 wt% or more, 2.4 wt% or more, 2.6 wt% or more, 2.8 wt% or more, 3.0 wt% or more, 3.5 wt % or more, 4.0 wt % or more, 4.5 wt % or more, or 4.8 wt % or more. Additionally, the content may be 5 wt% or less, 4.8 wt% or less, 4.5 wt% or less, 4 wt% or less, 3.5 wt% or less, 3 wt% or less, 2.8 wt% or less, 2.6 wt% or less, 2.4 wt% or less, 2.2 wt% or less, 2 wt% or less, 1.8 wt% or less, 1.6 wt% or less, 1.4 wt% or less less, 1.2 wt% or less, 1 wt% or less, 0.8 wt% or less, or 0.6 wt% or less. Preferably, the content may be 1 wt % or more and less than 3 wt %.

According to yet another embodiment, the content of the surfactant may be 0.5% to 2% by weight relative to the total weight of the composition. When the content is less than 0.5% by weight, the formulation is unstable, and when the content exceeds 2% by weight, the effect is almost indistinguishable from that in the case of 2% by weight, and skin irritation may be caused. The content of the anionic surfactant may be 0.5% by weight or more, 0.7% by weight or more, 0.9% by weight or more, 1.0% by weight or more, 1.2% by weight or more, 1.4% by weight or more, 1.5 wt% or more, 1.6 wt% or more, or 1.8 wt% or more. Additionally, the anionic surfactant may be present in an amount of 2 wt % or less, 1.8 wt % or less, 1.6 wt % or less, 1.5 wt % or less, 1.4 wt % or less, 1.2 wt % or less less, 1.0 wt% or less, 0.8 wt% or less, 0.6 wt% or less, or 0.55 wt% or less.

According to another aspect of the present invention, visible light may have a wavelength of 380 to 800 nm. Preferably, the visible light may be one or more of violet light having a wavelength of 380 to 430 nm and blue light having a wavelength of 430 to 500 nm.

According to one embodiment, the cosmetic composition can block 60% or more of violet light. The cosmetic composition can block 60% or more, 65% or more, 68% or more, 70% or more, 75% or more, 78% or more, 80% or more, 85% or more More, 90% or more, 95% or more, or 97% or more violet. Additionally, the cosmetic composition can block 98% or less, 95% or less, 90% or less, 85% or less, 80% or less, 78% or less, 75% or less, 70% % or less, 68% or less, 65% or less, or 63% or less violet.

According to another embodiment, the cosmetic composition can block 35% or more of blue light. The cosmetic composition can block 35% or more, 36% or more, 38% or more, 40% or more, 42% or more, 45% or more, 50% or more, 55% or more More, 60% or more, 65% or more, or 68% or more blue light. Additionally, the cosmetic composition can block 70% or less, 68% or less, 65% or less, 60% or less, 55% or less, 50% or less, 45% or less, 42 % or less, 40% or less, 38% or less, or 36% or less blue light.

According to another embodiment, the cosmetic composition may be a lotion or cream formulation. According to yet another embodiment, the cosmetic composition may be an oil-in-water (O/W) emulsion formulation. This specification is applicable to other formulations, but may be particularly pertaining to O/W emulsion compositions and methods of stabilizing their formulations. In the case of O/W emulsions, it has been significantly difficult to disperse a hydrophobic visible light blocker (eg, titanium dioxide with a surface treated with a hydrophobic substance, zinc oxide with a surface treated with a hydrophobic substance, or the like) in the aqueous phase, And it has become apparent that it is difficult to maintain O/W formulation stability even if the hydrophobic visible light blocker is dispersed, but this problem can be solved by an aspect of the present invention.

According to another embodiment, the cosmetic composition may be a liquid or cream formulation.

According to one aspect of the invention, the cosmetic composition can maintain formulation stability at -30°C to 60°C for 4 weeks or more. In one embodiment, the temperature may be -30°C or higher, -20°C or higher, -10°C or higher, -5°C or higher, 0°C or higher, 5°C or higher, 10 °C or higher, 15°C or higher, 20°C or higher, 25°C or higher, 30°C or higher, 35°C or higher, 40°C or higher, 45°C or higher, 50°C or higher higher, 55°C or higher, 60°C or higher, or 65°C or higher. Additionally, the temperature may be 60°C or lower, 55°C or lower, 50°C or lower, 45°C or lower, 40°C or lower, 35°C or lower, 30°C or lower, 25°C or lower Lower, 20°C or lower, 15°C or lower, 10°C or lower, 5°C or lower, 0°C or lower, -5°C or lower, -10°C or lower, -20°C or lower, or -25°C or lower. Preferably, the temperature may be -20°C to 45°C.

Additionally, stability can be maintained at -30°C to 60°C for 4 weeks or more, 5 weeks or more, 6 weeks or more, 7 weeks or more, 8 weeks or more, or 9 weeks or more . Additionally, stability can be maintained for 10 weeks or less, 9 weeks or less, 8 weeks or less, 7 weeks or less, 6 weeks or less, or 5 weeks or less.

According to one aspect of the present invention, the hydrophobic visible light blocker can be homogenized and dispersed at 5000 to 15000 rpm for 1 to 20 minutes. Preferably, the hydrophobic visible light blocker can be homogenized and dispersed at 8000 to 12000 rpm for 3 to 8 minutes. In one embodiment, the hydrophobic visible light blocker can be homogenized in the water phase or in the oil phase. According to another aspect of the present invention, the cosmetic composition can be obtained by homogeneously dispersing the hydrophobic visible light blocking agent and then emulsifying the hydrophobic visible light blocking agent together with other raw materials or components. In one embodiment, emulsification may be performed at 5000 to 15000 rpm for 1 to 20 minutes, preferably 8000 to 12000 rpm for 3 to 6 minutes.

According to another aspect, the cosmetic composition can be used to block visible light while simultaneously improving skin tone. According to one aspect of the present invention, it is possible to provide a cosmetic composition comprising a hydrophobic visible light blocker (eg, titanium dioxide having a surface treated with a hydrophobic material) capable of blocking harmful visible light (eg, blue or violet light) one or more of), stably maintains O/W formulations, and at the same time improves skin tone, and provides a method of stabilizing formulations of compositions, and thus this specification can be widely used with cosmetic compositions or sunscreens product-related fields.

The cosmetic composition may further include functional additives and components included in general cosmetic compositions. Functional additives may include, for example, components selected from the group consisting of water-soluble vitamins, oil-soluble vitamins, polypeptides, polysaccharides, sphingolipids, and seaweed extracts. Other components mixed in the composition may include fat and oil components, humectants, emollients, surfactants, organic and inorganic pigments, organic powders, UV absorbers, preservatives, bactericides, antioxidants, plants Extracts, pH adjusters, alcohol, pigments, fragrances, blood circulation accelerators, cooling agents, antiperspirants, pure water and the like.

The form of the cosmetic composition is not particularly limited and may be appropriately selected depending on the purpose. For example, the cosmetic composition can be formulated in any one or more forms selected from the group consisting of: cleansing products, cleansing products, skin exfoliating products, lotions, toners, toners, astringents, skin care products Liquid, Lotion, Moisturizer, Nourishing Lotion, Massage Cream, Nourishing Cream, Moisturizing Cream, Hand Cream, Foundation, Serum, Nourishing Serum, Mask, Soap, Cleansing Foam, Cleansing Gel, Cleansing Fluid, Cleansing Cream, Body Lotion and shower gel, but not limited to this. Preferably, the cosmetic composition may be in the form of a lotion or cream.

Where the formulation according to one aspect of the invention is an ointment, cream or gel, animal fibers, vegetable fibers, waxes, paraffins, starches, tragacanth, cellulose derivatives, polyethylene glycols, polyethylene Silica, bentonite, silica, talc, zinc oxide or the like are used as carrier components.

In the case where the formulation according to one aspect of the invention is a solution or emulsion, a solvent, solvating agent or emulsifier is used as a carrier component, and for example water, ethanol, isopropanol, ethyl carbonate, Ethyl acetate, benzyl alcohol, benzyl benzoate, propylene glycol, 1,3-butanediol oil, glycerol fatty acid esters, polyethylene glycol or sorbitol fatty acid esters.

Where the formulation according to one aspect of the present invention is a surfactant-containing detergent, aliphatic alcohol sulfate, aliphatic alcohol ether sulfate, sulfosuccinic acid monoester, isethionic acid Salt, imidazoline derivative, methyl taurine, sarcosinate, fatty acid amide ether sulfate, alkyl amide betaine, fatty alcohol, fatty acid glyceride, fatty acid diethanolamide, vegetable oil, linseed oil Acid derivatives, ethoxylated glycerol fatty acid esters or the like are used as carrier components.

In another aspect, the present invention can relate to a method of blocking visible light, the method comprising the step of administering to a subject in need thereof a cosmetic composition comprising: an oil phase portion comprising a UV light blocking agent or silicone oil; an aqueous phase portion, comprising one or more of surfactants or a thickening agent; and a hydrophobic visible light blocker, homogeneously dispersed in the aqueous phase portion.

In yet another aspect, the present invention can relate to a method of visible light blocking and skin tone improvement, the method comprising the step of administering to a subject in need thereof a cosmetic composition comprising: an oil phase portion comprising a UV light A light blocker or silicone oil; an aqueous phase portion, comprising one or more of surfactants or a thickener; and a hydrophobic visible light blocker, homogeneously dispersed in the aqueous phase portion.

In yet another aspect, the present invention can relate to the use of a composition comprising: an oil phase portion comprising a UV light blocker and a silicone oil; an aqueous phase portion comprising one or more of a surfactant and a thickening agent; and a hydrophobic visible light blocking agent, dispersed homogeneously in the water phase part, the composition is used to manufacture a cosmetic composition for blocking visible light.

In yet another aspect, the present invention relates to the use of a composition comprising: an oil phase portion comprising a UV light blocker and a silicone oil; an aqueous phase portion comprising one or more of a surfactant and a thickening agent; and a hydrophobic visible light blocking agent, dispersed homogeneously in the water phase part, the composition is used to manufacture a cosmetic composition for blocking visible light and improving skin tone.

In yet another aspect, the present invention can relate to the use of a composition comprising: an oil phase portion comprising a UV light blocker or silicone oil; an aqueous phase portion comprising one or more of a surfactant Or thickener; and a hydrophobic visible light blocking agent, dispersed homogeneously in the water phase part, this composition is used to block visible light or improve skin tone.

In yet another aspect, the present invention may relate to the use of a surfactant selected from the group consisting of phosphate surfactants, glutamic acid surfactants and urethane surfactants One or more of the group and contain specific levels to enhance the formulation stability of the cosmetic composition.

Hereinafter, configurations and effects according to an aspect of the present invention will be described in more detail with reference to examples and the like. However, to facilitate understanding of aspects of the present invention, the following examples are provided for illustrative purposes only, and the spirit and scope of the present invention are not limited thereto. [Examples and Comparative Examples] Preparation of Cosmetic Compositions of O/W Emulsion Formulations

Cosmetic compositions were prepared by dispersing _TiO2 for hydrophobic pigments (for colorants) in the aqueous phase of an O/W emulsion formulation using potassium cetyl phosphate. O/W emulsion formulations can be prepared using the components in Table 1 below, and can be prepared by conventional methods for making O/W emulsion formulations.

Specifically, when preparing the cosmetic composition for blocking ultraviolet light containing the components listed in Table 1 below, the components for the oil phase in the table were mixed according to the numerical values (% by weight) in the table, and Heat to 75°C (Mix 1). At the same time, the ingredients in the table for the water phase were mixed according to the values in the table (wt %) and heated to 75°C (Mix 2). Mixture 2 and surface-treated titanium dioxide were mixed and stirred with Mixture 1 (or surface-treated titanium dioxide was mixed and homogenized with Mixture 2 (5 minutes at 10,000 rpm) and this was mixed and stirred with Mixture 1), and then The composition was prepared by homogeneously emulsifying the thus obtained mixture (4 minutes at 10,000 rpm) using a homomixer (T.K. HOMOMIXER MARK II f model, TOKUSHU KIKA KOGYO CO. LTE).

（表1中的數值為重量%） [實驗性實例1] 對調配物穩定性、紫外光阻隔能力、有害可見光阻隔特性及存在或不存在膚色修正的確認In addition, when the composition was prepared by the above method, the content (% by weight) of the specific component was changed according to Table 1 below. [Table 1]

(Values in Table 1 are % by weight) [Experimental Example 1] Confirmation of Formulation Stability, UV Blocking Ability, Harmful Visible Light Blocking Properties, and Presence or Absence of Skin Tone Correction

The feasibility of using the compositions according to the above examples to manufacture actual cosmetic compositions and cosmetic products, as well as formulation stability, UV blocking ability and harmful visible light (blue and violet) blocking effects of the compositions were measured, and the presence or absence was checked Composition-induced complexion correction.

The presence or absence of separation of the actual cosmetic composition was observed by preparing the actual cosmetic composition (eg, sunscreen product) using the above examples and then observing at -20°C, 5°C, room temperature, 30°C and 45°C for 4 weeks, Results obtained for powder agglomeration, changes in appearance, and the like confirm formulation stability.

The UVB protection factor (SPF) is measured according to the method and standard used to measure the UV blocking effect by the ISO test method (ISO 24444). First, select 12 subjects suitable for testing purposes by examining medical history and diagnosing skin conditions, using a multi-port solar UV simulator (601-300W) to irradiate the back of the uncoated product with UV light, from 16 to 24 The minimal erythema dose (MED) for the uncoated site was determined after hours. Each sample of the cosmetic composition in Table 1 was evenly applied to the skin of the subject's back in an amount of 2 mg/cm ² . The skin was irradiated with UV light based on the MED of the site not coated with the product, and the MED and SPF of the standard and test composition samples were determined. The sun protection factor (SPFi) of each subject was calculated according to Formula 1, and the SPF of the composition sample was determined by the arithmetic mean. [Formula 1] Sun Protection Factor (SPFi) per subject = minimum erythema dose at product-coated sites/minimum erythema dose at product-uncoated sites

The protection factor (PFA) of UVA was determined according to the test method described in the measurement method of UVA blocking effect of Japan Cosmetic Industry Association (JCIA, 2012). The standard samples and cosmetic composition samples in Table 1 were uniformly applied to the back of the subject at ² mg/cm2, stabilized for 15 minutes, and then based on the minimum persistent pigment of the area not coated with the product The darkening dose was irradiated with UVA, and the minimum sustained pigment darkening dose and PFA were determined for standard samples and test products. The minimum persistent pigment darkening dose is determined, and the PFA is calculated using the determined value by Formula 2 below, and the average value is determined. [General formula 2] PFA=MPPD of the site coated with the sample/MPPD of the site not coated with the sample

Here, MPPD refers to minimal persistent pigment darkening dose (minimum ultraviolet radiation dose to identify faint darkening) (hereinafter referred to as MPPD).

In order to confirm the blue light blocking rate and violet light blocking rate of the cosmetic compositions prepared according to Table 1 above, the formulations of the Examples and Comparative Examples were coated on quartz or bandpass filters in an amount of ² mg/cm, and then Illumination was performed with a light source including the blue/violet region, and the transmitted blue/violet wavelength region (380 to 500 nm) was measured using a SPR-4001 spectroradiometer (Luzchem, Canada).

In addition, to test the skin tone correcting effect of the cosmetic compositions prepared according to Table 1 above, 10 subjects were selected, half of the face was coated with a normal sunscreen and the other half of the face was covered with a sunscreen prepared using the compositions of the Comparative Examples and Examples The product is applied, and the presence or absence of skin tone correction is checked and confirmed immediately after application.

（表2中的紫光阻隔率及藍光阻隔率的數值為%）Specific results are presented in Table 2 below. [Table 2]

(The values of violet light blocking rate and blue light blocking rate in Table 2 are %)

Regarding the manufacturing feasibility of cosmetic products (eg, sunscreen products) using cream formulations of the compositions, it has been found that all compositions except the composition of Example 3 can be prepared as cosmetic products. From a stability point of view of the O/W emulsion formulations, it was confirmed that in all examples except Example 2 and Example 3, the formulations were stable for 4 weeks or longer (ie, the emulsion formulations were stable to hydrophobic visible light The barrier agent is effectively and homogeneously dispersed in the water phase). In the case of Example 2, which contained no potassium cetyl phosphate but water-dispersible _TiO2 for coloration, it was not possible to maintain the formulation due to agglomeration of the _TiO2 coated with the hydrophilic (water-dispersible) material. In the case of Example 3 containing hydrophobic _TiO2 for coloring without potassium cetyl phosphate, since the hydrophobic visible light blocker ( _TiO2 coated with the hydrophobic substance) is not homogeneously dispersed in the water phase, it cannot be Maintain emulsion stability.

In Examples 4 to 6, experiments were conducted to compare the results when the content (1% to 3%) of the hydrophobic visible light blocker ( _TiO2 coated with a hydrophobic substance) was varied. As a result, in the case of using potassium cetyl phosphate to stabilize formulations containing a hydrophobic visible light blocker (TiO ₂ coated with a hydrophobic substance) at 1, 2 or 3 wt %, hydrophobic visible light blocking has been confirmed The agents were homogeneously dispersed in the aqueous phase and exhibited very excellent effects in terms of formulation stability, and especially in terms of harmful visible light blocking, these compositions outperformed the combination of Example 1 and Example 2 and the Comparative Examples However, it has been found that when a hydrophobic visible light blocker ( _TiO2 coated with a hydrophobic substance) is used at 3 wt. % using a hydrophobic visible light blocker). In addition, the skin tone correction effect (brightening of skin tone) was also confirmed in Examples 4 to 6. [Experimental Example 2] Effect Variation Dependent on Specific Component Content

（表3中的數值表示重量%） [表4]

（表4中的紫光阻隔率及藍光阻隔率的數值為%）The measurements depend on the stability of the formulation, the UV blocking effect and the harmful visible light blocking effect depending on the content of potassium cetyl phosphate (the content of _TiO2 coated with hydrophobic substance is fixed at 1 wt%). [table 3]

(Numerical values in Table 3 represent % by weight) [Table 4]

(The values of violet light blocking rate and blue light blocking rate in Table 4 are %)

As a result, when the content of potassium cetyl phosphate (% by weight) was increased from 0.5% to 1.0%, the blocking effect of ultraviolet light and harmful visible light was improved, but at a content higher than 1%, the same as that of 1% was obtained. Similar results were obtained at the content of .

It is believed that similar results to those of Experimental Example 1 and Example 2 were obtained where zinc oxide or iron oxide was used to prepare the composition in place of titanium dioxide, and it was confirmed that even when stearyl glutamine was used Similar results were obtained when sodium or inulin lauryl carbamate was used instead of potassium cetyl phosphate.

In addition, it is believed that similar results to those described above were obtained with coloring components such as titanium dioxide, zinc oxide, and iron oxide having surfaces treated with: polysiloxanes, such as dimethicone Siloxanes, methylsiloxanes, octylsilanes and fluoropolysiloxanes; amino acid derivatives such as lauryl lysine, disodium stearyl glutamate and sodium myristyl glutamate, Or fluorine-based surface treatment materials.

According to the present specification, it is possible to provide a stable oil-in-water cosmetic composition for blocking visible light, and a method for maintaining the stability of the composition, in which a hydrophobic visible light blocking agent is homogeneously dispersed in an aqueous phase, and which allows May meet the needs of consumers interested in this field and promote the development of related industries.

While the present invention has been described with respect to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention as defined in the following claims Revise.

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Claims (15)

A cosmetic composition for blocking visible light, comprising: an oil phase part comprising an ultraviolet light blocker and a silicone oil; an aqueous phase part comprising a surfactant selected from the group consisting of monophosphate ester surfactant, monoglutamic acid surfactant and one or more of the group consisting of a urethane surfactant and a thickening agent; and a hydrophobic visible light blocker, homogeneously dispersed in the aqueous phase portion, wherein the surfactant is cetacean Waxy potassium phosphate, wherein the hydrophobic visible light blocking agent is an inorganic powder having a hydrophobic treated surface, wherein the ultraviolet light blocking agent is one or more selected from the group consisting of: Ethyl Methoxycinnamate Ethylhexyl, ethylhexyl salicylate, diethylhexyloxyphenol methoxyphenyl triazine and diethylamino hydroxybenzyl hexyl benzoate, wherein the thickener is selected from One or more aqueous thickeners from the group consisting of: a carbomer, a polyacrylamide, a ammonium acryldimethyltaurate-VP copolymer, a three-star gum, a cellulose Ethers, a polyethylene derivative, an alginate, a polyacrylate and any mixture of these, and wherein one of the surfactants is present in an amount of 0.5% to 2% by weight relative to a total weight of the composition %. The cosmetic composition for blocking visible light as claimed in claim 1, wherein the surface treatment is carried out using one or more selected from the group consisting of dimethicone, methylpolysiloxane , Substituted octanoyl silane, lauryl lysine, disodium stearyl glutamate, sodium myristyl glutamate, silica, alumina and aluminum hydroxide. The cosmetic composition for blocking visible light as claimed in claim 1, wherein the inorganic powder comprises one or more selected from the group consisting of titanium dioxide, micro-titanium oxide (micro-TiO ₂ ), zinc oxide ( ZnO), Micro Zinc Oxide (Micro ZnO), Iron Oxide (FeO(II), Fe ₂ O ₃ (III), Fe ₃ O ₄ (IV)), Alumina (Alumina, Al ₂ O ₃ ), Barium Sulfate ( _BaSO3 ), silica (silica, _SiO2 ), talc, kaolin, sericite and mica. The cosmetic composition for blocking visible light as claimed in claim 1, wherein the hydrophobic visible light blocking agent is titanium dioxide coated with aluminum hydroxide and triethoxyoctylsilane. The cosmetic composition for blocking visible light as claimed in claim 1, wherein the silicone oil is one or more of cyclopentasiloxane or cyclohexylsiloxane. The cosmetic composition for blocking visible light as claimed in claim 1, wherein the ultraviolet light blocking agent is an organic ultraviolet light blocking agent or one or more of an inorganic UV light blocker. The cosmetic composition for blocking visible light as claimed in claim 1, wherein the content of one of the hydrophobic visible light blocking agents is 0.5% to 5% by weight relative to a total weight of the composition. The cosmetic composition for blocking visible light as claimed in claim 1, wherein the visible light is one or more of violet light having a wavelength of 380 to 430 nm and blue light having a wavelength of 430 to 500 nm. The cosmetic composition for blocking visible light as described in claim 1, wherein the cosmetic composition blocks 60% or more of violet light. The cosmetic composition for blocking visible light as described in claim 1, wherein the cosmetic composition blocks 35% or more of blue light. The cosmetic composition for blocking visible light according to claim 1, wherein the cosmetic composition is an emulsion or cream formulation. The cosmetic composition for blocking visible light according to claim 1, wherein the cosmetic composition is an oil-in-water (O/W) emulsion formulation. The cosmetic composition for blocking visible light as claimed in claim 1, wherein the cosmetic composition maintains a formulation at room temperature Stability for 4 weeks or more. The cosmetic composition for blocking visible light according to claim 1, wherein the cosmetic composition is used for blocking visible light and simultaneously for improving skin tone. A method of enhancing the stability of formulations of a cosmetic composition for blocking visible light, the cosmetic composition comprising: an oil phase portion comprising an ultraviolet light blocker and a silicone oil; an aqueous phase portion comprising a monophosphoric acid selected from the group consisting of one or more of the group consisting of an ester surfactant, a monoglutamic acid surfactant, and a monourethane surfactant, and a thickening agent; and a hydrophobic visible light blocker, homogeneously dispersed in In the water phase part, the method includes the steps of: adjusting the content of one of the surfactants to 0.5% to 2% by weight relative to the total weight of one of the compositions in the cosmetic composition, wherein the surfactant is The agent is potassium cetyl phosphate, wherein the hydrophobic visible light blocking agent is an inorganic powder having a hydrophobic treated surface, wherein the ultraviolet light blocking agent is one or more selected from the group consisting of: methoxy Ethylhexyl cinnamate, ethylhexyl salicylate, bisethylhexyloxyphenol methoxyphenyltriazine and diethylaminohydroxybenzylhexylbenzoate, and the thickening The agent is one or more selected from the group consisting of Aqueous thickeners: one carbomer, one polyacrylamide, one acrylamide dimethyl taurate ammonium-VP copolymer, three fairy gum, one cellulose ether, one polyethylene derivative, one seaweed acid salts, monopolyacrylates and any mixtures of these.