WO2016108579A1 - Chemically anisotropic powder, and cosmetic composition containing same - Google Patents

Abstract

A chemically anisotropic powder with improved emulsion dispersion stability, and a cosmetic composition containing the same are disclosed in the present specification. The chemically anisotropic powder has a first polymer spheroid and a second polymer spheroid coupled in such a structure in which one polymer spheroid at least partially penetrates the other polymer spheroid, wherein any one of the first polymer spheroid and the second first polymer spheroid comprises a polymer containing siloxane, and one or more of the first polymer spheroid and the second first polymer spheroid are negatively or positively charged, thereby having effects of preventing phase separation even with a minimum amount of a thickening agent and enabling a toner type low-viscosity form containing a high oil content, the toner type low-viscosity form having yet to be applied.

Description

Chemically Anisotropic Powder and Cosmetic Composition Containing the Same

Disclosed herein are chemically anisotropic powders having improved emulsion dispersion stability and cosmetic compositions containing the same.

The emulsion system using a conventionally developed surfactant should be manufactured in a small and uniform size within several micrometers so that no emulsification breakdown such as creaming, flocculation, coalescence, or breaking occurs. It is known that it can be manufactured stably. Thus, research has been focused on emulsifying formulations for producing emulsion particle sizes small and uniform within a few micrometers.

However, in order to implement such a formulation, it is necessary to stabilize the interfacial membrane by using an excess of surfactant relative to the oil content, and increase the viscosity by using a thickener and wax to reduce the flow rate of the emulsified particles. Due to this, there were technical difficulties in diversifying formulations due to various limitations such as sticky and stiff negative feeling, viscosity constraint, and stiffness due to the use of thickeners.

On the other hand, various manufacturing methods of fine particles (nano, micro size) of various shapes and sizes have been reported, and in particular, spherical fine particles made of a polymer have been expanded as the size and shape are adjusted according to the manufacturing method. . One of the applications is a pickling emulsion that can form stabilized large emulsified particles using fine spherical particles. Furthermore, there have been attempts to produce new anisotropic powders by imparting amphiphilic properties having both hydrophilicity and hydrophobicity to the fine spherical particles. An example is Janus spherical particles. However, these spherical morphological limitations limit chemical anisotropy. In other words, even though morphological anisotropy is hydrophobic or hydrophilic as a whole, there is a limit to chemical anisotropy. In addition, the phase separation phenomenon (supernatant creaming in the case of O / W type, lower liquid precipitate in the case of W / O type) may occur due to the difference in specific gravity due to the emulsified particle size.

Accordingly, a small amount of thickener (for example, carbomer) is to provide an anisotropic powder and a cosmetic composition containing the same to increase the dispersibility of the large emulsion particles to prevent phase separation.

In one aspect, the present disclosure aims to provide a chemically anisotropic powder that maintains a dispersed state while increasing the electrostatic repulsion between emulsified particles using an anisotropic powder to minimize an external viscosity increase using a thickener, a wax, and the like.

In another aspect, the present disclosure provides a cosmetic composition that is stable and forms a large emulsion particles and does not occur even if the emulsion particle size is not uniform, while at the same time improving the dispersion stability between particles to minimize external thickeners For the purpose of

In another aspect, the present disclosure provides a low-viscosity emulsion cosmetic composition containing a high content oil having a softness and moisturizing power such as lotion, but having a low viscosity or no viscosity emulsion formulation such as skin and toner, and excellent in spreadability and usability. It aims to do it.

In one aspect, the technology disclosed herein includes a first polymer spheroid and a second polymer spheroid, wherein the first polymer spheroid and the second polymer spheroid are at least partially infiltrating the relative polymer spheroid. And wherein the first polymeric spheroid has a core-shell structure and the shell comprises a functional group, and at least one of the first polymeric spheroid and the second polymeric spheroid is negatively or positively charged. It provides chemically anisotropic powder with enhanced acidity.

According to an exemplary embodiment, at least one of the first polymer spheroid and the second polymer spheroid may include an ionic vinyl polymer.

According to an exemplary embodiment, the ionic vinyl polymer may be a sodium 4-vinylbenzenesulfonate polymer.

According to an exemplary embodiment, the core of the first polymer spheroid and the second polymer steroid may include a vinyl polymer, and the shell of the first polymer spheroid may include a copolymer of a vinyl monomer and a functional group.

According to an exemplary embodiment, the vinyl polymer may include polystyrene.

According to an exemplary embodiment, the functional group may be a siloxane.

According to an exemplary embodiment, the chemically anisotropic powder may have a symmetrical shape, an asymmetrical snowman shape, or an asymmetric inverse snowman shape based on the bonding portion where the first polymer spheroid and the second polymer spheroid are combined. .

According to an exemplary embodiment, the chemically anisotropic powder may have a particle size of 100 to 1500 nm.

In another aspect, the technology disclosed herein provides a cosmetic composition with improved dispersibility containing chemically anisotropic powder.

According to an exemplary embodiment, the chemically anisotropic powder may form large emulsified particles of 5 to 200 ㎛.

According to an exemplary embodiment, the chemically anisotropic powder may be contained in an amount of 0.1 to 15% by weight based on the total weight of the cosmetic composition.

According to an exemplary embodiment, the cosmetic composition may have an oil content of 15 to 30% by weight based on the total weight of the cosmetic composition.

According to an exemplary embodiment, the cosmetic composition may have a low viscosity emulsion formulation of 300 CPS or less.

In one aspect, the technique disclosed herein is an emulsification system that enables uniform dispersion with repulsive force between powder emulsified particles without a thickener by modifying the surface of the anisotropic powder to minimize the amount of thickener used for dispersing the emulsified particles. Has the effect of providing. This emulsification system prevents phase separation with minimal thickener content and allows skin-like low viscosity formulations containing high content oils that have not been attempted before.

In another aspect, the techniques disclosed herein include chemically anisotropic powders with improved dispersibility, which results in stable formulations of large emulsion particles and uneven formulation even when the emulsion particle size is not uniform, while at the same time improving dispersion stability between particles. It is effective to provide a cosmetic composition that can minimize external thickeners.

In another aspect, the technique disclosed herein has a low viscosity emulsion cosmetic that contains a high content oil that has a softness and moisturizing power such as a lotion but has a low or no viscosity emulsion formulation such as a skin or a toner and has excellent applicability and usability. It has the effect of providing a composition.

1 is a schematic diagram for forming chemically anisotropic powder.

Figure 2 is a photograph of the viscosity comparison results of the emulsion cosmetic composition of a low viscosity formulation containing a high content oil disclosed herein. From left to right, (a) general skin formulation, (b) formulation of Preparation Example 1, and (c) general lotion formulation are shown.

3 is a photograph of the microscopic observation of a low viscosity formulation containing a high content oil disclosed herein. The left photograph is (a) 200 times magnification, the right photograph is (b) enlarged at 400 magnification, and the chemically anisotropic powder according to the present specification was found to form large emulsion particles of several tens of micrometers with a minimum of 15 to 60 µm.

Figure 4 is a photograph of the results of confirming the formulation stability of the emulsion cosmetic composition disclosed herein. (A) Room temperature, (b) 45 degree | times, (c) 60 degree | times, and (d) Refrigerated 4th week storage samples are shown in order from the left.

Figure 5 is a result of comparing the moisturizing power of the emulsion cosmetic composition (Preparation Example 1) and (b) general skin, (c) general lotion, (d) general cream of the low viscosity formulation containing high content oil disclosed herein It is a graph.

Figure 6 is a measurement of the skin glossiness of the emulsion cosmetic composition (Preparation Example 1) and (b) general skin, (c) general lotion, (d) general cream of (a) a low viscosity formulation containing high oil content disclosed herein Comparison graph.

Hereinafter, with reference to the accompanying drawings, it will be described embodiments of the present application in more detail. However, the technology disclosed in the present application is not limited to the embodiments described herein and may be embodied in other forms. It is merely to be understood that the embodiments introduced herein are provided so that the disclosure can be made thorough and complete, and that the spirit of the present application can be fully conveyed to those skilled in the art. In order to clearly express each component in the drawings, the size, such as the width or thickness of the component, is shown to be somewhat enlarged. In addition, although only a part of the components are shown for convenience of description, those skilled in the art will be able to easily understand the rest of the components. In addition, one of ordinary skill in the art may implement the spirit of the present application in various other forms without departing from the technical spirit of the present application.

As used herein, unless otherwise defined, "substituted" means that one or more hydrogen atoms of the functional groups of the present invention are halogen (F, Cl, Br or I), hydroxy, nitro, imino (= NH, = NR, R Is an alkyl group having 1 to 10 carbon atoms), amidino group, hydrazine or hydrazone group, carboxyl group, substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, substituted or unsubstituted It may mean substituted with a heterocycloalkyl group having 2 to 30 ring carbon atoms.

As used herein, "(meth) acryl" may mean acryl and / or methacryl.

The particle size of the amphipathic anisotropic powder herein is a measure of the maximum length, which is the longest length of the powder particles. The particle size range of the amphipathic powder herein means that at least 95% of the amphipathic anisotropic powder present in the composition falls within this range.

In the present specification, the average particle diameter of the emulsified particles means an average value of the diameters of the single particles. In the present specification, the average particle diameter range of the emulsified particles means that at least 95% of the emulsified particles present in the composition fall within the range.

In one aspect, the technology disclosed herein includes a first polymer spheroid and a second polymer spheroid, wherein the first polymer spheroid and the second polymer spheroid are at least partially infiltrating the relative polymer spheroid. And wherein the first polymeric spheroid has a core-shell structure and the shell comprises a functional group, and at least one of the first polymeric spheroid and the second polymeric spheroid is negatively or positively charged. It provides chemically anisotropic powder with enhanced acidity.

In the present specification, the spheroid is a body composed of a polymer, for example, may be a spherical body or an ellipsoid, and may have a long axis length of micro units or nano units based on the longest length in the body cross section.

According to an exemplary embodiment, at least one of the first polymer spheroid and the second polymer spheroid may include an ionic vinyl polymer. By providing a positive or negative charge to the chemically anisotropic powder, including the ionic vinyl polymer, it is possible to electrostatically prevent mutual bonding (bonding) during particle generation, thereby minimizing the use of thickeners when the chemically anisotropic powder is used in the composition. Inter-integration is prevented and may contribute to the preparation of a stable emulsion composition.

According to an exemplary embodiment, the ionic vinyl polymer may be a sodium 4-vinylbenzenesulfonate polymer.

According to an exemplary embodiment, the core of the first polymer spheroid and the second polymer steroid may include a vinyl polymer, and the shell of the first polymer spheroid may include a copolymer of a vinyl monomer and a functional group.

According to an exemplary embodiment, the vinyl polymer may be a vinyl aromatic polymer, for example, may be polystyrene.

According to an exemplary embodiment, the functional group may be a siloxane.

According to an exemplary embodiment, the chemically anisotropic powder may have a symmetrical shape, an asymmetrical snowman shape, or an asymmetric inverse snowman shape based on the bonding portion where the first polymer spheroid and the second polymer spheroid are combined. .

According to an exemplary embodiment, the chemically anisotropic powder may have a particle size of 100 to 1500 nm. In another aspect, the chemically anisotropic powder may have a particle size of 100 to 500 nm, or 200 to 300 nm. In this case, the particle size means the length of the longest portion of the chemically anisotropic powder. Specifically, the chemically anisotropic powder has a particle size of 100 nm or more, 200 nm or more, 300 nm or more, 400 nm or more, 500 nm or more, 600 nm or more, 700 nm or more, 800 nm or more, 900 nm or more, 1000 nm or more At least 1100 nm, at least 1200 nm, at least 1300 nm, or at least 1400 nm, at most 1500 nm, at most 1400 nm, at most 1300 nm, at most 1200 nm, at most 1100 nm, at most 1000 nm, at most 900 nm, at most 800 nm, It may be 700 nm or less, 600 nm or less, 500 nm or less, 400 nm or less, 300 nm or less or 200 nm or less.

In another aspect, the technology disclosed herein provides a cosmetic composition with improved dispersibility containing chemically anisotropic powder.

According to an exemplary embodiment, the chemically anisotropic powder may form large emulsified particles of 5 to 200 ㎛. In another aspect, the chemically anisotropic powder may be to form large emulsified particles of 10 to 100 ㎛, 10 to 50 ㎛, or 25 ㎛. Specifically, the chemically anisotropic powder is 5 μm or more, 10 μm or more, 15 μm or more, 20 μm or more, 25 μm or more, 30 μm or more, 40 μm or more, 50 μm or more, 80 μm or more, 100 μm or more, 130 μm 200 μm or less, 180 μm or less, 150 μm or less, 130 μm or less, 100 μm or less, 80 μm or less, 50 μm or less, 40 μm or less, 30 μm or less, 25 μm or less while being 150 μm or more or 180 μm or more , Emulsified particles of 20 μm or less, 15 μm or less, or 10 μm or less can be formed.

The chemically anisotropic powder has a different orientation to the interface, it is possible to form a stable large emulsion particles. In addition, the cosmetic composition containing the chemically anisotropic powder has an effect of providing a unique dual usability having a moisture feeling by the water burst of the large emulsified particles and nutrients by the applicability of the small emulsion particles. In addition, due to the increased repulsive force between particles of the chemically anisotropic powder, the large emulsion particles can be stably dispersed at a minimum viscosity to emulsify the low viscosity O / W formulation.

While it was difficult to make stabilized large emulsion particles having a particle diameter of several tens of micrometers with conventional molecular-level surfactants, and the surfactant film thickness of the surfactant was about several nm, in the case of the chemically anisotropic powder disclosed herein, The emulsion stability can be greatly improved by increasing to about several hundred nm and forming a stabilized interfacial film due to strong bonding between powders.

According to an exemplary embodiment, the chemically anisotropic powder may be contained in an amount of 0.1 to 15% by weight based on the total weight of the cosmetic composition. In another aspect, the chemically anisotropic powder may be contained 0.5 to 5% by weight based on the total weight of the cosmetic composition. Specifically, the chemically anisotropic powder is at least 0.1% by weight, at least 0.5% by weight, at least 1% by weight, at least 2% by weight, at least 4% by weight, at least 6% by weight, at least 8% by weight, based on the total weight of the cosmetic composition. At least 15%, at least 12% by weight, at most 15%, at most 12%, at most 10%, at most 8%, at most 6%, at most 4%, at most 2%, at most 1%, or Or 0.5 weight percent or less. By controlling the chemically anisotropic powder content, the emulsified particle size can be adjusted from several μm to several tens or hundreds of μm.

According to an exemplary embodiment, the cosmetic composition may be an emulsion. Specifically, the emulsion may be one of oil-in-water (O / W), water-in-oil (W / O), W / O / W or O / W / O.

In one aspect, the emulsion may be an oil-in-water (O / W) formulation having a chemically anisotropic powder, oil phase and water phase content ratio of 0.1 to 15: 5 to 60: 10 to 80 by weight. In another aspect, the emulsion may be an oil-in-water (O / W) formulation having a chemically anisotropic powder, oil phase and water phase content ratio of 0.1 to 5: 15 to 40: 50 to 80 by weight. In addition, the emulsion may be a water-in-oil (W / O) formulation having a chemically anisotropic powder, oil phase and water phase content ratio of 1 to 15:50 to 80:10 to 30 by weight. The oil phase portion may include one or more selected from the group consisting of liquid fats, solid fats, waxes, hydrocarbon oils, higher fatty acids, higher alcohols, synthetic ester oils and silicone oils.

According to an exemplary embodiment, the chemically anisotropic powder may be added together with the aqueous phase to prepare an emulsion cosmetic composition.

According to an exemplary embodiment, the cosmetic composition comprises at least 15 wt%, at least 16 wt%, at least 16 wt%, at least 17 wt%, at least 17 wt%, at least 18 wt% of oil, based on the total weight of the cosmetic composition, 18 wt%, at least 19 wt%, at least 19 wt%, or at least 20 wt%, at most 30 wt%, at most 29 wt%, at most 28 wt%, at most 27 wt%, at most 26 wt%, or 25 wt%. It may contain up to%. For example, the oil may be included in 15 to 30% by weight, 15 to 25% by weight or 20 to 25% by weight. The cosmetic composition having the oil content not only has a stabilized large emulsion particles, there is an effect that can minimize the thickener content is improved dispersibility between the particles.

The oil may be ester oil, hydrocarbon oil, waxes, animal oil, vegetable oil, silicone oil or mixtures thereof. Specifically, the oil is hexyl laurate, dicaprylyl carbonate, diisostearyl malate, butylene glycol dicaprylate / dicaprate ), Cetyl ethylhexanoate, Triethylhexanoin, Dicetearyl dimer dilinoleate, Caprylic / Capric Triglyceride, Ester-based oils selected from the group consisting of Polyglyceryl-2 Triisostearate and Pentaerythrityl Tetraisostearate; Hydrocarbon-based oils selected from the group consisting of polybutene, hydrogenated polyisobutene and phytosqualane; It may be at least one of silicone oils selected from the group consisting of phenyl trimethicone (Phenyl trimethicone) and dimethicone (Dimethicone).

According to an exemplary embodiment, the cosmetic composition may have a low viscosity near-viscosity emulsion formulation that is impossible to measure the viscosity. As used herein, "no viscosity" means a low viscosity such that the viscosity is not measured using a conventional viscosity meter.

Conventional emulsification systems require a small amount of emulsified particles, so that the higher the oil content, the higher the amount of surfactant added, and the higher the oil content, the more viscous substances such as thickeners or waxes are required to prevent and stabilize the phase separation. It has a negative feeling of stickiness, stiffness, etc., and has a lotion or cream-like formulation and it is impossible to prepare a formulation such as a skin. On the other hand, the chemically anisotropic powder according to the present disclosure is improved in dispersibility, it is possible to prepare a stable cosmetic emulsifying composition of 300 cps or less having a skin-like formulation with a minimum amount of thickener while increasing the oil content to 25% by weight.

According to an exemplary embodiment, the cosmetic composition may have a viscosity of, for example, 300 cps or less. For example, the viscosity is 300 cps or less, 290 cps or less, 280 cps or less, 270 cps or less, 260 cps or less, 250 cps or less, 240 cps or less, 230 cps or less, 220 cps or less, 210 cps or less, 200 cps or less , 190 cps or less, 180 cps or less, 170 cps or less, 160 cps or less, 150 cps or less, 140 cps or less, 130 cps or less, 120 cps or less, 110 cps or less, 100 cps or less, 90 cps or less, 80 cps or less, 70 cps or less, 60 cps or less, 50 cps or less, 40 cps or less, 30 cps or less, or 20 cps or less, 0 cps or more, 1 cps or more, 2 cps or more, 3 cps or more, 4 cps or more, 5 cps or more, 6 cps or above, 7 cps or above, 8 cps or above, 9 cps or above, 10 cps or above, 11 cps or above, 12 cps or above, 13 cps or above, 14 cps or above, 15 cps or above, 16 cps or above, 17 cps or above, 18 cps or above , 19 cps or more, 20 cps or more. Although the viscosity range of the composition has been exemplified above, it may represent a low viscosity formulation that is substantially impossible to measure the viscosity.

Since the cosmetic composition includes a chemically anisotropic powder, it is possible to stably disperse even at the minimum viscosity due to the increase in repulsive force between the emulsified particles to emulsify the O / W formulation in a low viscosity form such as a skin shape.

In another aspect, the technique disclosed herein comprises the steps of (1) stirring a first monomer and a polymerization initiator to prepare a core of a first polymeric spheroid; (2) stirring the core of the prepared first polymeric spheroid with a compound including a first monomer, a polymerization initiator, and a functional group to prepare a coated first polymer spheroid having a core-shell structure; And (3) preparing the anisotropic powder in which the second polymer spheroid is formed by stirring the prepared first polymer spheroid having a core-shell structure with a second monomer and a polymerization initiator. Provide a method.

According to one exemplary embodiment, the method may include surface treatment of one or more of the first polymer spheroid and the second polymer spheroid with a negative charge or a positive charge.

According to one exemplary embodiment, at least one of the first polymer spheroid and the second polymer spheroid by mixing and stirring the ionic vinyl monomer with the polymerization initiator in at least one of the steps (1) and (2) The spheroid can be given a negative or positive charge.

In the steps (1), (2) and (3), the stirring may be rotary stirring. Rotational agitation is preferred because uniform mechanical mixing is required along with chemical modification to produce uniform particles. The rotary stirring may be rotary stirring in the cylindrical reactor, but the rotary stirring method is not limited thereto.

At this time, the design inside the reactor has a great influence on the powder formation. The size and location of the baffles in the cylindrical reactor and the degree of spacing with the impeller greatly affect the uniformity of the particles produced. It is desirable to minimize the blade gap between the inner wing and the impeller to equalize the convective flow and its strength, and to supply the powder reaction liquid below the wing length and maintain the impeller rotation speed at a high speed. It may be rotated at a highway of 200 rpm or more, and the ratio of the length of the diameter and the height of the reactor may be 1 to 3: 1 to 5, more specifically, 10 to 30 cm in diameter and 10 to 50 cm in height. The reactor size can vary in proportion to the reaction capacity. In addition, the material of the cylindrical reactor may be ceramic, glass, etc., the temperature at the time of stirring is preferably 50 to 90 ℃.

In the cylindrical rotary reactor, the simple rotary method enables the production of uniform particles and is a low energy method that requires less energy, and has a characteristic of enabling mass production by maximizing reaction efficiency. The tumbling method in which the reactor itself rotates in the related art requires high energy and rotates the reactor at a predetermined angle, thus requiring high energy and restricting the size of the reactor. Due to the limitations of the reactor size, the amount produced is also limited to small amounts of about several hundred mg to several g, making it unsuitable for mass production.

According to one exemplary embodiment, the first monomer and the second monomer may be the same or different, specifically, may be a vinyl monomer. In addition, the first monomer added in step (2) is the same as the first monomer used in step (1), the initiator used in each step may be the same or different.

According to an exemplary embodiment, the vinyl monomer may be a vinyl aromatic monomer. In one example, the vinyl aromatic monomer may be substituted or unsubstituted styrene, for example, may be one or more selected from the group consisting of styrene, alphamethyl styrene, alpha ethyl styrene and paramethyl styrene.

According to one exemplary embodiment, the polymerization initiator may be a radical polymerization initiator, specifically, at least one of a peroxide-based and azo-based. Moreover, ammonium persulfate, sodium persulfate, potassium persulfate can also be used. The peroxide radical polymerization initiator is benzoyl peroxide, lauryl peroxide, cumene hydroperoxide, methyl ethyl ketone peroxide, t- butyl hydroperoxide, o-chlorobenzoyl peroxide, o- methoxy benzoyl peroxide, t-butylperoxy-2-ethylhexanoate and t-butylperoxyisobutyrate may be one or more selected from the group consisting of, the azo radical polymerization initiator is 2,2'- azobisisobutyronitrile, 2,2'-azobis (2-methylisobutyronitrile) and 2,2'-zobis (2,4-dimethylvaleronitrile).

According to an exemplary embodiment, in the step (1), the first monomer and the polymerization initiator may be mixed in a weight ratio of 100 to 250: 1.

In another aspect, in step (1), the ionic vinyl monomer is added together with the first monomer and the polymerization initiator to mix the first monomer, the polymerization initiator and the ionic vinyl monomer in a weight ratio of 100 to 250: 1: 1: 0.001-5. can do. The powder size and shape are determined according to the first polymer spheroid size control in the initial step (1), and the first polymer spheroid size can be adjusted according to the reaction ratio of the first monomer, the initiator and the ionic vinyl monomer. Moreover, by mixing in the weight ratio of the said range, there exists an effect which can raise the uniformity of anisotropic powder.

According to one exemplary embodiment, the ionic vinyl monomer may use sodium 4-vinylbenzenesulfonate. Anisotropic powders prepared using ionic vinyl monomers prevent swelling of particles, including ionic vinyl polymers, and impart a positive or negative charge to the surface of the powder to prevent electrostatic integration between particles during particle generation. do.

When the chemically anisotropic powder has a size of 200 to 250 nm, the ratio of the first monomer, the initiator and the ionic vinyl monomer is 110 to 130: 1: 2 to 4, specifically 115 to 125: 1: 2 to 4, more specifically 120: 1: 3 may be prepared from the first polymer spheroid.

In addition, when the chemically anisotropic powder has a size of 400 to 450 nm, the ratio of the first monomer, the initiator, and the ionic vinyl monomer is 225 to 240: 1: 1 to 3, specifically 230 to 235: 1: 1 to 3, More specifically, it may be prepared from the first polymer spheroid of 235: 1: 1.

In addition, when the chemically anisotropic powder has a size of 1100 to 1500 nm, the ratio of the first monomer, the initiator and the ionic vinyl monomer is 110 to 130: 1: 0, specifically 115 to 125: 1: 0, more specifically 120 1: 1 can be prepared from a first polymer spheroid.

In addition, the chemically anisotropic powder in the form of an asymmetric snowman has a ratio of the first monomer, the initiator and the ionic vinyl monomer in a range of 100 to 140: 1: 8 to 12, specifically 110 to 130: 1: 1 to 11, more specifically 120: It may be prepared from the first polymer spheroid prepared at a reaction ratio of 1:10.

In addition, the chemically anisotropic powder in the form of an asymmetric inverse snowman has a ratio of the first monomer, the initiator and the ionic vinyl monomer in a range of 100 to 140: 1: 1 to 5, specifically 110 to 130: 1: 1 to 4, more specifically 120 It can be prepared from the first polymer spheroid prepared at a reaction ratio of 1: 3.

According to an exemplary embodiment, the compound including the first monomer, the polymerization initiator and the functional group in the step (2) may be mixed in a weight ratio of 80 to 98: 0.2 to 0.8: 2 to 20. In another aspect, the compound including the first monomer, the polymerization initiator and the functional group may be mixed in a weight ratio of 160 to 200: 1: 6 to 40. The degree of coating can be adjusted according to the reaction ratio, and then the shape of the chemically anisotropic powder is made according to the degree of coating. When reacting with the reaction ratio, the coating thickness increases to about 10-30%, specifically 20%, relative to the initial thickness. The coating is too thick so that powdering does not proceed or is too thin so that the powdering proceeds well without the problem of powdering in multiple directions. Moreover, by mixing in the weight ratio of the said range, there exists an effect which can raise the uniformity of anisotropic powder.

According to an exemplary embodiment, the compound containing the functional group may be a compound containing siloxane, may be a siloxane-containing (meth) acrylate monomer. The siloxane-containing (meth) acrylate monomers in the group consisting of 3- (trimethoxysilyl) propyl acrylate, 3- (trimethoxysilyl) propyl methacrylate, vinyltriethoxysilane and vinyltrimethoxysilane It may be one or more selected.

According to an exemplary embodiment, in the step (3), the second monomer and the polymerization initiator may be mixed in a weight ratio of 200 to 250: 1.

In another aspect, in step (3), the ionic vinyl monomer is added together with the second monomer and the polymerization initiator to mix the second monomer, the polymerization initiator and the ionic vinyl monomer in a weight ratio of 200 to 250: 1: 0.001 to 5. can do. The specific kind of ionic vinyl monomer is as above-mentioned. By mixing in the weight ratio of the said range, there exists an effect which can raise the uniformity of anisotropic powder.

According to an exemplary embodiment, the second monomer content in the step (3) may be mixed to 40 to 300 parts by weight when the weight of the first polymer spheroid of the core-shell structure is 100 parts by weight. Specifically, when the second monomer content is 40 to 100% by weight of the weight of the first polymer spheroid of the core-shell structure, an asymmetrical snowman type powder is obtained, and when it is 100 to 150%, or 110 to 150%, a symmetrical shape The powder of is obtained, and when it is 150 to 300% and 160 to 300%, an asymmetric inverse snowman type powder is obtained. Moreover, by mixing in the weight ratio of the said range, there exists an effect which can raise the uniformity of anisotropic powder.

Attempts have been made to increase the interfacial activity by imparting interfacial activity to the spherical powder particles used in the conventional pickling. Examples include Janus spherical particles, but the geometrical limitations and the difficulty of uniform mass production make practical applications. This was not done. On the other hand, the method of producing the chemically anisotropic powder disclosed in the present specification does not use a cross-linking agent, there is no entanglement in production, the yield is high and uniform, and mass production is easier than the tumbling method using a simple stirring method. In particular, there is an advantage that can be mass-produced in the size of several tens g to several tens of kg nano size of 300 nm or less.

Hereinafter, the present invention will be described in more detail with reference to Examples. These examples are only for illustrating the present invention, it will be apparent to those skilled in the art that the scope of the present invention is not to be construed as limited by these examples.

Preparation Example 1 Preparation of Polystyrene (PS) First Polymer Spheroid

Styrene as a monomer, sodium 4-vinylbenzenesulfonate as an ionic vinyl monomer, and azobisisobutyronitrile (AIBN) as an initiator were mixed in an aqueous phase for 8 hours at 75 ° C. Reacted. The reaction was stirred in a cylindrical reactor, which was 11 cm in diameter, 17 cm in height, glass, and was rotated at a speed of 200 rpm.

Preparation  2. Preparation of Coated First Polymer Spheroid of Core-Shell (CS) Structure

Styrene, TMSPA (3- (trimethoxysilyl) propylacrylate) as a monomer, and azobisisobutyronitrile (AIBN) as an initiator were mixed and reacted with the obtained polystyrene (PS) first polymer spherical particles. . The reaction was stirred in a cylindrical reactor.

Preparation Example 3 Preparation of Ionic Anisotropic Powder

Styrene as a monomer, sodium 4-vinylbenzenesulfonate as an anionic vinyl monomer, and azobisisobutyine as an initiator in a polystyrene-core shell (PS-CS) aqueous dispersion solution obtained as a result of the reaction. Rinitrile (Azobisisobutyronitrile, AIBN) was mixed and heated to 75 ° C to proceed with the reaction. The reaction was stirred in a cylindrical reactor.

Preparation Example 1 High Viscosity Oil-Containing Low Viscosity Emulsion Cosmetic Composition

To prepare an emulsion cosmetic composition in a compounding ratio as shown in Table 1 below, by heating and dissolving the oil phase portion and warming the water phase portion containing the anisotropic powder to the same temperature as the oil phase portion, the oil phase portion was slowly added to the water phase portion and emulsified at low speed. Thereafter, a thickener was added and dispersed to prepare a high viscosity oil-containing low viscosity oil-in-water emulsion cosmetic composition.

Ingredient Name	Content (% by weight)
Oil (Hydrogenated Polydecene)	15.00
Shea Butter	2.00
D. I. water	68.55
Metal Ion Blocker (EDTA 2Na)	0.05
Moisturizer (Butylene Glycol)	7.00
Moisturizer (Glycerine)	5.00
Anisotropic powder	1.85
Preservative (Phenoxyethanol)	0.40
Preservative (Ethylhexylglycerine)	0.05
Spices	0.1

Test Example 1 Viscosity Comparison

0.2 ml of each of the cosmetic composition prepared in Preparation Example 1, a general skin formulation, and a general lotion formulation were dropped on a cardboard and tilted at an angle of about 60 degrees. As a result, as shown in FIG. 2, the fluidity was shown to be large as in the general skin formulation, and it was found to have excellent applicability and usability.

Test Example 2 Confirmation of Formulation Stability

After the cosmetic composition prepared in Preparation Example 1 was stored in (a) room temperature, (b) 45 degrees, (c) 60 degrees, and (d) refrigerated thermostat, the presence or absence of emulsion destruction was observed for 10 weeks. As can be seen that the formulation is maintained stably without emulsification destruction phenomenon.

Test Example 3 Sensory Evaluation

Using the cosmetic composition prepared in Preparation Example 1 was surveyed for the feeling of use (15 points scale, 1 point: very low to 10 points: very high) for 40 women panel in their 30s to 40s. The product was compared to the cosmetic composition prepared in Preparation Example 1 by using a general skin, general lotion and general cream formulation.

	Moisture	Water burst	Nutrition
Preparation Example 1	8	9	8
Normal skin	8	8	2
General lotion	5	4	6
Plain cream	4	2	8

As a result, in the case of the cosmetic composition prepared in Preparation Example 1, each of the emulsified particles coexist in unison with each other, so that there is a unique double usability that has a sensation of moisture caused by the water bursting of the large emulsified particles and nutrients by the applicability of the small emulsified particles thereafter. Confirmed.

Test Example 4 Evaluation of Moisturizing Power and Skin Gloss

The cosmetic composition, general skin, general lotion, and general cream prepared in Preparation Example 1 were applied to the skin of 15 in-house researchers, and measured for moisturizing power and skin shine. Moisturizing power was measured by measuring moisture content at constant temperature and constant humidity (24 ° C, 40% relative humidity) before and after 4 hours of use and after 7 hours of use. Was measured. After washing, the forearm site was measured after 15 minutes in a constant temperature and humidity condition. The moisture content is shown in FIG. 5 by evaluating the skin moisture content by measuring the skin capacitance by using a skin moisture meter (Corneometer CM825, C + K Electronic Co., Germany). The light is emitted and the specularly reflected light is measured and measured to evaluate the shine. The results are shown in FIG. 6.

As a result, as shown in Figs. 5 and 6, it was confirmed that the cosmetic composition prepared in Preparation Example 1 had the moisturizing power and the luster of the lotion and the cream while being the appearance of the skin (Fig. 2).

As described above, specific portions of the present disclosure have been described in detail, and for those skilled in the art, these specific techniques are merely preferred embodiments, and the scope of the present disclosure is not limited thereto. Will be obvious. Thus, the substantial scope of the present invention will be defined by the appended claims and their equivalents.

Claims (13)

1. A first polymer spheroid and a second polymer spheroid,

   The first polymer spheroid and the second polymer spheroid are combined at least partially in a structure that penetrates the relative polymer spheroid,

   The first polymer spheroid has a core-shell structure and the shell includes a functional group,

   At least one of the first polymer spheroid and the second polymer spheroid is negatively or positively charged, an improved chemically anisotropic powder.
2. The method of claim 1,

   At least one of the first polymeric spheroid and the second polymeric spheroid comprises an ionic vinyl polymer.
3. The method of claim 2,

   The ionic vinyl polymer is a chemically anisotropic powder, characterized in that the sodium 4-vinylbenzenesulfonate polymer.
4. The method of claim 1,

   The core and the second polymer steroid of the first polymer spheroid includes a vinyl polymer,

   The shell of the first polymer spheroid chemically anisotropic powder, characterized in that it comprises a copolymer of a vinyl monomer and a functional group.
5. The method of claim 4, wherein

   Chemically anisotropic powder, characterized in that the vinyl polymer comprises polystyrene.
6. The method of claim 1,

   Chemical functional anisotropic powder, characterized in that the functional group is a siloxane.
7. The method of claim 1,

   The chemically anisotropic powder has a symmetrical shape, an asymmetrical snowman shape, or an asymmetric inverse snowman shape based on a bonding portion in which the first polymer spheroid and the second polymer spheroid are bonded to each other.
8. The method of claim 1,

   The chemically anisotropic powder has a particle size of 100 to 1500 nm.
9. Cosmetic composition with improved dispersibility containing the chemically anisotropic powder of any one of Claims 1-8.
10. The method of claim 9,

    The chemically anisotropic powder is a cosmetic composition, characterized in that to form large emulsion particles of 5 to 200 ㎛.
11. The method of claim 9,

    The chemically anisotropic powder is a cosmetic composition, characterized in that contained 0.1 to 15% by weight based on the total weight of the cosmetic composition.
12. The method of claim 9,

    The cosmetic composition is a cosmetic composition, characterized in that it has an oil content of 15 to 30% by weight based on the total weight of the cosmetic composition.
13. The method of claim 9,

    The cosmetic composition is a cosmetic composition, characterized in that it has a low viscosity emulsion formulation of less than 300 CPS.

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