Cosmetic composition comprising oil gel beads having superior stability and feeling, and a preparation method thereof

Abstract

The present invention relates to a cosmetic composition comprising oil gel beads in a continuous phase of an aqueous phase and a method for manufacturing the same. In this way, the oil gel beads form a stable dispersed phase within the continuous phase of an aqueous phase, thereby providing a cosmetic composition having a differentiated appearance and excellent usability.

Description

Technology Field

[0001] The present invention relates to an oil gel bead cosmetic composition having excellent stability and usability, and a method for manufacturing the same. Background Technology

[0002] Recently, alongside the rise of functional cosmetics in the market, there has been an increasing demand for visual aesthetics and differentiated user experiences. Reflecting this emotional demand, there have been ongoing attempts to provide users with visual pleasure, aesthetic sensibility, and the joy of makeup by modifying the unique shapes, colors, or textures of bead formulations.

[0003] Traditional cosmetic compositions are provided in formulations such as skin, toner, lotion, and cream, but there is increasing interest in oil gel beads to provide a new texture upon application to the skin, as well as visual differentiation and new aesthetic sensibility. However, oil gel beads have droplet sizes of at least 10㎛, making it difficult to guarantee colloidal stability, and various process variables exist, such as the need to consider the difference in refractive index between the oil phase and the aqueous phase to maintain a translucent state.

[0004] In particular, while oils are widely used in most cosmetic compositions, differing only in content, hydrophilic synthetic surfactants have been added to address the drawbacks of oily texture and ensure the stability of the oil-dispersed emulsion formulation. However, as skin safety becomes increasingly important, the use of synthetic surfactants in products is being restricted. Furthermore, due to concerns about skin irritation and consumer avoidance, there is a demand for the development of new surfactant-free cosmetic compositions.

[0005] In response to these demands, Prior Art 1 discloses a cosmetic composition containing spherical droplets in which oil is dispersed in an aqueous alcohol solution using a suitable powder without using synthetic surfactants, so that the oil exists as a spherical droplet on the aqueous alcohol solution. However, Prior Art 1 has limitations in that it uses aluminum oxide powder, which raises skin safety concerns due to aluminum, and it cannot be applied to users who do not prefer alcohol because it contains a large amount of alcohol.

[0006] Prior art 2 discloses an oil capsule gel bead composition having a droplet size of 10㎛ or more by optimizing the components of the composition without using synthetic surfactants. Although Prior art 2 has the advantages of excellent colloidal stability and a transparent formulation, it has a limitation in that it is difficult to control the sensation when applied to the skin due to the use of an aliphatic hydrophobic polymer to ensure colloidal stability.

[0007] Therefore, there is a need to develop a novel cosmetic composition that does not use synthetic surfactants, contains oil gel beads in the form of spherical droplets with a particle size of at least 10 μm, and has excellent colloidal stability and improved usability. Prior art literature

[0008] Korean Registered Patent No. 10-0135358 Korean Registered Patent No. 10-2644826 The problem to be solved

[0009] The objective of the present invention is to provide an oil gel bead composition that does not use synthetic surfactants, contains oil gel beads of at least 10 μm or larger, has excellent colloidal stability, and has an improved feel for use, and a method for manufacturing the same. means of solving the problem

[0010] The oil gel bead composition according to the present invention comprises oil beads in an oil phase dispersed in an aqueous phase which is a continuous phase, wherein the oil phase comprises two or more hydrophobic polymers and exhibits reversible sol-gel transition behavior in a temperature range of 50 to 120 ℃, wherein the aqueous phase comprises an acrylic acid-based polymer and water, wherein the oil phase comprises gel-like oil beads having an average particle size of 10 μm or more at a temperature of less than 50 ℃, and wherein the oil phase comprises a siloxane-based polymer containing amino groups in the side chains of repeating units.

[0011] A method for preparing an oil gel bead composition according to the present invention comprises: S1) heating an aqueous phase containing an acrylic acid-based polymer and water to a first temperature (T1); S2) heating an oil phase containing two or more hydrophobic polymers and oil to a sol-gel transition temperature (Tc) or higher; S3) introducing and stirring the oil phase into the aqueous phase to prepare an oil dispersion; and S4) cooling the oil dispersion to prepare oil gel beads; wherein the oil phase comprises a siloxane-based polymer containing amino groups in the side chains of repeating units. Effects of the invention

[0012] The present invention provides a novel oil gel bead composition that does not use synthetic surfactants and contains oil gel beads of at least 10 μm or larger, while having excellent colloidal stability and an improved feel. In addition, the oil gel bead composition according to the present invention rolls lightly and quickly when applied to the skin and can prevent skin dryness. Brief explanation of the drawing

[0013] Figure 1 is an optical microscope image of an oil gel bead composition according to an example. Specific details for implementing the invention

[0014] The present invention is described below in detail so that those skilled in the art can easily implement it. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, it is not intended to limit the scope of protection defined by the claims.

[0015] Furthermore, unless otherwise defined, technical and scientific terms used in the description of the present invention have the meaning commonly understood by those skilled in the art to which this invention pertains, and descriptions of known functions and configurations that could unnecessarily obscure the essence of the present invention are omitted in the following description.

[0016] The numerical ranges used in this specification include lower and upper limits and all values ​​within the range, increments logically derived from the form and width of the defined range, all of which are limited values, and all possible combinations of upper and lower limits of the numerical range defined in different forms. Unless otherwise specifically defined in the specification of this invention, values ​​outside the numerical range that may occur due to experimental error or rounding of values ​​are also included in the defined numerical range.

[0017] Unless otherwise specifically defined in the present invention, the phrase “comprising” a certain component means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Furthermore, the singular form used in the specification and appended claims may be intended to include the plural form unless specifically indicated otherwise in the context.

[0018] Units used herein without special notation are based on weight, for example, units of % or ratio mean weight % or weight ratio, and weight % means the weight percentage of any one component of the total composition that occupies the composition, unless otherwise defined.

[0019] The term "substantially not comprising" in this specification means that other elements, materials, or processes not listed together with the specified elements, materials, or processes may be present in an amount that does not have an unacceptably significant effect on at least one basic and novel technical concept of the invention.

[0020] In this specification, viscosity has units of cP (centipoise) unless otherwise specifically defined.

[0021] The present invention relates to an oil gel bead composition comprising oil beads in an oil phase dispersed in an aqueous phase that is a continuous phase, wherein the oil phase comprises two or more hydrophobic polymers and exhibits reversible sol-gel transition behavior in a temperature range of 50 to 120 °C, the aqueous phase comprises an acrylic acid-based polymer and water, the oil phase comprises gel-phase oil beads having an average particle size of 10 μm or more at a temperature of less than 50 °C, and the oil phase comprises a siloxane-based polymer containing amino groups in the side chains of repeating units.

[0022] The oil gel beads may have an average particle size of 10 to 1000 μm within the aqueous phase, which is a continuous phase. The average particle size of the oil gel beads may be 10 μm or more, 20 μm or more, 50 μm or more, 100 μm or more, 500 μm or more, 800 μm or more as a lower limit, and 5000 μm or less, 4000 μm or less, 3000 μm or less, or 2000 μm or less as an upper limit. Specifically, it may be 10 to 5000 μm, and more specifically, it may be 20 to 4000 μm, 50 to 3000 μm, or 100 to 2000 μm. The oil gel beads may have excellent colloidal stability while having the large average particle size described above, and may have a transparent or translucent phase by controlling the refractive index of the oil phase and the aqueous phase. When the average particle size of the oil gel beads is 10 μm or less, the dispersion stability is excellent, but it is undesirable because it transitions from a translucent phase to an opaque phase, resulting in a poor appearance.

[0023] The above volume ratio of the aqueous phase to the oil phase is not limited as long as the aqueous phase is included in an equal or greater volume than the oil phase. Specifically, it may be 50:50 to 99:1, 55:45 to 95:5, 55:45 to 90:10, 60:40 to 85:15, 60:40 to 80:20, or 60:40 to 80:20.

[0024] According to some embodiments, the viscosity of the aqueous phase may be 200 cP or more. The lower limit of the viscosity of the aqueous phase may be 200 cP or more, 300 cP or more, 400 cP or more, or 500 cP or more, and the upper limit may be 30,000 cP or less, 15,000 cP or less, 12,000 cP or less, 10,000 cP or less, or 8,000 cP or less. Specifically, the viscosity of the aqueous phase may be 200 to 30,000 cP, 300 to 15,000 cP, 400 to 12,000 cP, or 500 to 5,000 cP. The viscosity of the oil phase is not limited as long as it is higher than the viscosity of the water phase below the sol-gel transition temperature, but may have a lower limit of 1,000 cP or more, 5,000 cP or more, 10,000 cP or more, 25,000 or more, or have the characteristics of a viscoelastic solid with substantially no flowability.

[0025] The acrylic acid-based polymer included in the aqueous phase may be a hydrophobic substituent acrylic acid-based polymer as a water-soluble polymer containing acrylic acid residues in its structural units. Specifically, the hydrophobic substituent acrylic acid-based polymer may be a long-chain alkyl group substituent acrylic acid-based polymer.

[0026] According to some embodiments, the acrylic acid-based polymer included in the aqueous phase may be a crosspolymer of (meth)acrylic acid and C10-C30 alkyl (meth)acrylate. Preferably, the hydrophobic substituent acrylic acid-based polymer may be a long-chain alkyl group-substituent acrylic acid-based polymer having C14 or more, specifically C16 to C20, and exemplarily may be a crosspolymer of (meth)acrylic acid and C14-20 alkyl (meth)acrylate. The acrylic acid-based polymer containing C14 or more aliphatic groups may be a graft-type polymer in which C14 or more aliphatic groups are bonded to the side chain of the acrylic acid polymer main chain.

[0027] The above aqueous phase may additionally include a basic compound. Non-limiting examples of the basic compound include one or more selected from sodium hydroxide, potassium hydroxide, ammonium hydroxide, tromethamine, arginine, and triethanolamine. When the above aqueous phase contains a basic compound, the (meth)acrylic acid structural units in the acrylic acid-based polymer present in the aqueous phase may be deprotonated by a subsequent neutralization process with the basic compound, thereby further improving the stability of the oil gel beads.

[0028] The lower limit of the weight-average molecular weight of the acrylic acid-based polymer may be 10,000 g / mol or more, 50,000 g / mol or more, 100,000 g / mol or more, or 200,000 g / mol or more, and the upper limit may be 10,000,000 g / mol or less, 5,000,000 g / mol or less, or 1,000,000 g / mol or less. Specifically, the weight-average molecular weight of the acrylic acid-based polymer may be 10,000 to 10,000,000 g / mol, and more specifically, 100,000 to 5,000,000 g / mol.

[0029] The acrylic acid-based polymer contained in the above aqueous phase may be included in an amount of 0.01 to 20 parts by weight, 0.01 to 10 parts by weight, or 0.03 to 1 part by weight per 100 parts by weight of water. In addition, the acrylic acid-based polymer may be 0.005 to 0.5% by weight, specifically 0.01 to 0.25% by weight, of the total weight of the composition.

[0030] According to some embodiments, the acrylic acid-based polymer contained in the aqueous phase may be included in an amount of 0.01 to 50 parts by weight, more specifically 0.1 to 30 parts by weight, based on 100 parts by weight of the hydrophobic polymer contained in the oil phase, but is not limited thereto.

[0031] According to some embodiments, the viscosity (η) of the above aqueous phase w ) is the viscosity of the oil phase (η) at a temperature of 50 ℃ or lower. o It can be lower than ).

[0032] According to some embodiments, the oil phase may be included in an amount of 20 to 70 weight% of the total weight of the composition. Specifically, the oil phase may be included in an amount of 20 to 65 weight%, 30 to 60 weight%, or 40 to 60 weight% of the total weight of the composition, but is not limited thereto.

[0033] The above oil phase comprises two or more hydrophobic polymers, and the hydrophobic polymers may be polymers of the same species or polymers of different types. For example, it may be a binary mixture comprising one vinyl polymer and one siloxane polymer, or a binary mixture comprising one vinyl polymer and one siloxane polymer. The above oil phase exhibits reversible sol-gel transition behavior in a temperature range of 50 to 120 °C, forms a liquid sol with fluidity at a temperature above the sol-gel transition temperature (Tc), and can be converted into a viscoelastic solid that is substantially non-flowable at a temperature below Tc. More specifically, the above oil phase may be a ternary mixture comprising one vinyl polymer, one acrylate polymer, and one siloxane polymer, or a ternary mixture comprising one vinyl polymer, one urethane polymer, and one siloxane polymer.

[0034] The above sol-gel transition temperature (Tc) may be 100 ℃ or lower, 90 ℃ or lower, or 80 ℃ or lower as an upper limit, and 50 ℃ or higher or 60 ℃ or higher as a lower limit, for example, 50 to 120 ℃, 50 to 100 ℃, or 60 to 90 ℃.

[0035] The siloxane-based polymer included in the above oil phase is a siloxane-based polymer containing amino groups in the side chains of repeating units, and may include primary, secondary, tertiary, or quaternary amino groups. The siloxane-based polymer includes a siloxane-based structural unit containing an amino group as an essential component, and may further include a dialkyl siloxane-based structural unit. The dialkyl siloxane-based structural unit may be, for example, dimethyl siloxane, but is not limited thereto. The siloxane-based structural unit containing an amino group may be in an amount of 1 to 100 mol%, 2 to 80 mol%, 5 to 50 mol%, or 10 to 30 mol% with respect to the total molar amount of the siloxane-based polymer structural unit, but is not limited to the above numerical ranges.

[0036] As the above oil phase includes a siloxane-based polymer containing amino groups, the transparency of the oil gel beads can be further improved, the greasy feeling is significantly reduced, and when applied to the skin, it can provide a light and fast-absorbing feel.

[0037] A siloxane-based polymer containing amino groups in the side chains of the above repeating unit may be included in an amount of 0.001 to 1 weight%, 0.002 to 0.5 weight%, 0.002 to 0.1 weight%, preferably 0.005 to 0.05 weight% of the total weight of the composition, but is not limited thereto.

[0038] According to some embodiments, the oil phase may further include a fatty acid. Specifically, the fatty acid may be a C12-C30 fatty acid, and more specifically, a C16-C20 fatty acid. Examples of the fatty acid may be stearic acid, oleic acid, palmitic acid, or linoleic acid, and specifically, oleic acid or linoleic acid. As the fatty acid is included in the oil phase, the fatty acid may electrostatically interact with the amino groups included in the siloxane-based polymer, and through this interaction, the siloxane-based polymer may be stably positioned within the oil and may have excellent miscibility with other aliphatic hydrophobic polymers.

[0039] According to some embodiments, the fatty acid may be ionically complexed with the amino groups of the siloxane polymer. As the fatty acid is ionically complexed with the amino groups contained in the siloxane polymer, the fatty acid is strongly bound to the siloxane polymer, which can improve miscibility with hydrophobic aliphatic polymers in the oil phase. Furthermore, the ion complexation may be desirable in that it can alleviate chemical instability and skin irritation that may be caused by the amino groups of the siloxane polymer. Since the siloxane polymer contains structural units containing amino groups in its side chains, the fatty acid may have a structure in which it is grafted onto the siloxane polymer through ion complexation.

[0040] The above fatty acids may be included in an amount of 0.01 to 5 weight%, 0.05 to 3 weight%, 0.05 to 2 weight%, or 0.1 to 2 weight% of the total weight of the composition, but are not limited thereto.

[0041] According to some embodiments, the hydrophobic polymer contained in the oil phase may be one or more combinations selected from the group consisting of vinyl polymers, acrylate polymers, urethane polymers, and hydrophobic modified polysaccharides.

[0042] Examples of the above hydrophobic polymers may be one or more combinations selected from the group consisting of graft-type polysaccharides containing C14 or more aliphatic groups, condensates of polyhydric alcohol compounds and polyisocyanates, and graft-type polyolefins containing C14 or more aliphatic groups.

[0043] The graft-type polysaccharide containing C14 or higher, specifically C14 to C16 aliphatic groups, can be used without limitation as long as it is a water-soluble polysaccharide, and non-limiting examples include oligomeric dextran (dextrin), oligomeric alginic acid, oligomeric hyaluronic acid, or oligomeric pullulan. The C14 or higher, specifically C16 to C20 aliphatic groups can be chemically bonded to the side chains of the water-soluble polysaccharide, and can be bonded, for example, through covalent bonding, but is not limited thereto. Although the polysaccharide main chain has hydrophilicity, the hydrophobic polysaccharide has hydrophobicity due to the large amount of alkyl group substitution. The graft-type polysaccharide containing C14 or higher aliphatic groups is substituted with alkyl groups to such an extent that it is not soluble in water but soluble in oil, and for example, 0.2 to 1.5 alkyl groups may be substituted on one glucoside unit corresponding to the repeating unit, but is not limited thereto. For example, it may be dextrin palmitate or dextrin palmitate / ethylhexanoate.

[0044] An example of a condensation product of a polyalcohol compound and a polyisocyanate is a polymer formed by the condensation of a polyalcohol compound and a polyisocyanate through a urethane bond, such as hexamethylene diisocyanate / trimethylol hexyllactone crosspolymer (HDI / Trimethylol Hexyllactone Crosspolymer).

[0045] Hydrogenated Poly(C6-20 Olefin) can be exemplified as a graft-type polyolefin containing C14 or higher aliphatic groups.

[0046] In a specific example, the hydrophobic polymer may be a mixture of a graft-type polyolefin containing C14 or higher aliphatic groups, a condensate of castor oil and a cycloaliphatic polyisocyanate, and a condensate of a polyalcohol-based compound and a cycloaliphatic polyisocyanate. As the mixture is included in the oil phase, the oil capsule beads may have the characteristics of a viscoelastic solid while also having translucent properties.

[0047] The hydrophobic polymer included in the above oil phase may be 1 weight% or more, 3 weight% or more, 5 weight% or more, and 60 weight% or less or 50 weight% or less with respect to the total weight of the oil phase as a lower limit, and specifically 1 to 60 weight%, more specifically 3 to 50 weight%, but is not limited thereto.

[0048] According to some embodiments, the hydrophobic polymer may be included in an amount of 1 to 50 parts by weight based on 100 parts by weight of oil included in the oil phase. Specifically, the hydrophobic polymer included in the oil phase may be included in an amount of 2 to 50 parts by weight or 3 to 40 parts by weight based on 100 parts by weight of oil.

[0049] The oil included in the above oil phase may be silicone oil, hydrocarbon oil, ester oil, triglyceride oil, vegetable oil, animal oil, mineral oil, natural oil, or a combination thereof, and specifically may be linear aliphatic ester oil or triglyceride oil.

[0050] For example, the above ester-based oil may be an aliphatic oil containing one or more ester bonds, and specifically, it may be one or more selected from triethylhexanoin, cetylethylhexanoate, cetyloctanoate, cetylisooctanoate, isononyl isononanoate, octyldodecyl myristate, pentaerythrityltetraethylhexanoate, isopropyl palmitate, isopropyl myristate, tocopherol acetate, etc., but is not limited thereto.

[0051] Preferably, the oil included in the oil phase may include a triglyceride-based oil. As the oil phase includes a triglyceride-based oil, the oil gel beads dispersed in the aqueous phase may have superior dispersion stability and can effectively form a structure of oil gel beads in which the oil is located internally and a hydrophobic polymer forms the capsule wall material.

[0052] For example, the above triglyceride-based oil may be one or more selected from C8-C12 acid triglyceride, C12-C18 acid triglyceride, caprylic / capric triglyceride, caprylic / capric / lauric triglyceride, C10-C40 isoalkyl acid triglyceride, C10-C18 triglyceride, glyceryl triacetyl hydrostearate, soybebin glyceride, tribehenin, tricaprin, triethylhexanoin, triheptanoin, triisostearin, tripalmitin, or tristeaarin, but is not limited thereto.

[0053] The above oil may be included in an amount of 10 to 60 weight%, 20 to 50 weight%, or 25 to 40 weight% of the total weight of the composition, but is not limited thereto.

[0054] According to some embodiments, the oil phase may include a triglyceride-based oil as the oil, and the hydrophobic polymer may include an aliphatic hydrophobic polymer, a siloxane-based polymer containing amino groups in the side chains of the repeating units, and a fatty acid. As the oil phase includes the above components, the siloxane-based polymer containing amino groups in the side chains of the repeating units exhibits excellent miscibility with the aliphatic hydrophobic polymer, and the transparency of the oil gel bead composition may be improved.

[0055] According to some embodiments, the aqueous phase may further include a polyhydric alcohol selected from the group consisting of one or more of ethylene glycol, propylene glycol, butylene glycol, pentylene glycol, isopentyldiol, hexanediol, ethylhexanediol, methylpropanediol, sorbitol, erythritol, inositol, maltitol, and xylitol to further improve the stability of the oil gel beads.

[0056] The above polyhydric alcohol may be included in an amount of 0 to 5 weight%, specifically 0.01 to 3 weight%, more specifically 0.1 to 2 weight% of the total weight of the oil gel bead composition, but is not limited thereto.

[0057] According to some embodiments, the oil gel bead composition may substantially not contain glycerin. While the inclusion of glycerin in the oil gel bead composition can facilitate the realization of a transparent formulation, it may degrade the user experience of the oil gel bead composition due to stickiness or a heavy feeling. Despite not substantially containing glycerin, the oil gel bead composition according to some embodiments can realize a transparent or translucent formulation and provide a light and fast-absorbing user experience when applied to the skin.

[0058] As previously mentioned, conventional emulsification systems and oil gel bead compositions must contain a large amount of alcohol or a surfactant to ensure colloidal stability, but the oil gel bead composition according to the present disclosure may substantially not contain a synthetic surfactant for emulsifying the aqueous and oil phases. By not containing a surfactant, significantly superior skin safety may be achieved, and consumer preference may be further enhanced.

[0059] In this specification, the phrase "substantially not containing synthetic surfactants or glycerin" means that they are not included within a range that substantially affects the functional effects of the oil gel bead composition, and does not exclude their inclusion in trace amounts for impurities or other known additional functional effects. Specifically, synthetic surfactants or glycerin may be included in an amount of 0.1% by weight or less, 0.01% by weight or less, 0.001% by weight or less, or 0.0001% by weight or less with respect to the total weight of the oil gel bead composition, and may be 0% by weight or more at the lower limit.

[0060] The synthetic surfactant for the above emulsion may be a component used for the purpose of stabilizing the emulsion phase, and specifically, it may be a low molecular weight cationic, anionic, or nonionic surfactant, and exemplarily, may be a surfactant with a molecular weight of 5000 g / mol or less, a molecular weight of 2000 g / mol or less, or a molecular weight of 1000 g / mol or less, and non-limitingly, a surfactant with a molecular weight of 100 g / mol or more.

[0061] The oil gel bead composition according to the present invention prevents the aggregation of oil gel beads, thereby allowing the oil gel beads to be stably dispersed in the aqueous phase. Since the oil gel bead composition according to the present disclosure exhibits reversible sol-gel transition behavior, it exists as a viscoelastic solid oil gel bead with substantially no flowability below the sol-gel transition temperature (Tc), but above the sol-gel transition temperature (Tc), as the oil phase transitions to a sol state, it can be converted into an oil drop composition within the aqueous phase. Accordingly, if the colloidal stability of the oil gel bead composition decreases due to long-term storage, the colloidal stability can be restored by heating above the sol-gel transition temperature (Tc) and then performing agitation or stirring, thereby providing a desirable advantage in terms of storage stability.

[0062] The present invention provides a method for manufacturing an oil gel bead composition, wherein the manufacturing method comprises: S1) heating an aqueous phase containing an acrylic acid-based polymer and water to a first temperature (T1); S2) heating an oil phase containing two or more hydrophobic polymers and oil to a sol-gel transition temperature (Tc) or higher; S3) introducing and stirring the oil phase into the aqueous phase to produce an oil dispersion; and S4) cooling the oil dispersion to produce oil gel beads; wherein the oil phase comprises a siloxane-based polymer containing amino groups in the side chains of repeating units.

[0063] According to some embodiments, the viscosity (η) of the aqueous phase at or below the sol-gel transition temperature (Tc) is w The viscosity of the above oil phase (η) is greater than ) o ) can be high.

[0064] The specific description of the components, viscosity, and content included in the aqueous and oil phases in the method for preparing the oil gel bead composition according to the present invention is the same as that described in the oil gel bead composition, so a specific description is omitted.

[0065] In one example, the aqueous phase may further include a basic compound, and the types of the basic compound have been described above, so a detailed explanation is omitted. If the aqueous phase includes a basic compound, it induces an increase in the viscosity of the acrylic acid-based polymer, and the (meth)acrylic acid structural units in the acrylic acid-based polymer present in the aqueous phase are deprotonated by a neutralization process, thereby further improving the stability of the gel beads.

[0066] According to some embodiments, the oil phase heated above the sol-gel transition temperature (Tc) may further comprise a protonated acrylic acid-based polymer. The acrylic acid-based polymer may be the same as the acrylic acid-based polymer contained in the aqueous phase.

[0067] For example, the protonated acrylic acid-based polymer included in the oil phase may be at least 1 weight% and at least 2 weight% with respect to the total weight of the acrylic acid-based polymer included in the oil gel bead composition, and at least 5 weight% and at least 4 weight% with respect to the upper limit, and specifically, the acrylic acid-based polymer included in the oil phase may be included in an amount of 1 to 5 weight% and 2 to 4 weight%.

[0068] As the acrylic acid-based polymer included in the oil phase is protonated, it may not be completely dissolved in the oil phase, but it may have a certain level of dispersibility. The acrylic acid-based polymer dispersed in the oil phase moves to the interface between the oil phase and the water phase during the subsequent mixing step with the water phase to stabilize the oil gel beads. Since the acrylic acid polymer is completely or partially deprotonated and, preferably, at least a portion of the structural units are substituted with hydrophobic groups, the interface between the water phase and the oil phase can be effectively stabilized, thereby providing additional stability to the oil capsule gel beads.

[0069] The first temperature for heating the aqueous phase may be 30 to 100 °C, specifically 40 to 90 °C, and the temperature for heating the oil phase above the sol-gel transition temperature (Tc) may be 40 to 100 °C, specifically 50 to 90 °C.

[0070] According to some embodiments, in step S2), the oil phase may further include fatty acids. While heating and stirring the oil phase above Tc, electrostatic interaction or ionic complexation may be induced between the fatty acids and the amino groups contained in the side chains of the siloxane-based polymer repeating units.

[0071] To manufacture oil gel beads, an aqueous phase containing an acrylic acid-based polymer heated to a first temperature and water is introduced into a constant temperature bath, an oil phase containing a hydrophobic polymer heated above a sol-gel transition temperature and oil is introduced into a hydrophobic raw material supply unit, and then the oil phase is dropped from a transport pipe under a certain pressure and introduced into a constant temperature bath containing the aqueous phase, and the oil phase and the aqueous phase are mixed with a stirrer, thereby producing a composition in which the oil phase is dispersed in the form of gel beads.

[0072] For example, the above method for manufacturing oil gel beads may further include, after the step of manufacturing a composition dispersed in the form of gel beads, a step of aging for 10 to 60 minutes, specifically 20 to 40 minutes, and a step of cooling to 60°C or lower, specifically 50°C or lower.

[0073] Examples and experimental examples are described below with specific examples. However, the examples and experimental examples described below are merely illustrative of some aspects, and the technology described in this specification is not limited thereto.

[0075] (Example 1)

[0076] An aqueous phase was prepared by mixing 97.925 g of water, 2.0 g of 1,2-Hexanediol, 0.05 g of Acrylates / C10-30 Alkyl Acrylate Crosspolymer, and 0.025 g of Tromethamine, and an oil phase was prepared by mixing 80 g of Caprylic / Capric Triglyceride, 19 g of Dextrin Palmitate, and 0.02 g of Amodimethicone. The aqueous phase was heated to 80°C and placed into a constant temperature bath, and the oil phase, heated to 100°C, was placed into the inlet. Then, pressure was applied to drop the oil phase into the constant temperature bath through a transport pipe to perform mixing, with a stirring speed of 250 rpm. The volume ratio of the oil phase to the aqueous phase before mixing was 3:7. A mixture of the oil phase and the aqueous phase, formed by letting all of the oil phase fall into the aqueous phase, was aged at 60°C for 30 minutes and then slowly cooled to 25°C to prepare an oil gel bead composition. Referring to Fig. 1, it can be confirmed that transparent oil gel beads were stably formed within the composition.

[0077] (Example 2)

[0078] In Example 1, the procedure was carried out in the same manner as Example 1, except that 0.5g of oleic acid was additionally included in the oil phase.

[0079] (Example 3)

[0080] The procedure was carried out in the same manner as Example 1, except that a mixture of 84 g of Isononyl Isononanoate, 11.8 g of Caprylic / Capric Triglyceride, 2.4 g of Castor Oil / IPDI Copolymer, 1.5 g of Hydrogenated Poly(C6-20 Olefin), 0.3 g of HDI / Trimethylol Hexyllactone Crosspolymer, and 0.02 g of Amodimethicone was used as the oil phase.

[0081] (Example 4)

[0082] In Example 3, the procedure was carried out in the same manner as Example 1, except that 0.5g of linoleic acid was additionally included in the oil phase.

[0083] (Example 5)

[0084] The procedure was carried out in the same manner as Example 4, except that the mixing ratio was adjusted so that the volume ratio of the oil phase to the water phase before mixing was 6:4.

[0085] (Comparative Example 1)

[0086] The procedure was carried out in the same manner as Example 1, except that amodimethicone was not used in Example 1.

[0087] (Comparative Example 2)

[0088] The procedure was carried out in the same manner as Example 1, except that xanthan gum was used instead of Acrylates / C10-30 Alkyl Acrylate Crosspolymer.

[0089] (Comparative Example 3)

[0090] The procedure was carried out in the same manner as Example 1, except that 30g of dimethicone / vinyl dimethicone crosspolymer, 60g of dimethicone, and 0.5g of amodimethicone were used as the oil phases.

[0092] (Experimental Example)

[0093] The usability and colloidal stability of the oil gel bead compositions according to the examples and comparative examples were evaluated.

[0094] Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Colloidal safety 4.8 4.4 4.8 4.3 4.2 4.0 2.8 4.2 User experience 3.8 4.6 3.9 4.7 4.6 3.8 3.8 3.2

[0095] Colloidal stability was evaluated under accelerated testing conditions at 45°C for 4 weeks. Stability was evaluated on 10 samples for each case, with a rating from 0 to 5, where 0 signifies complete phase separation and 5 signifies a state identical to the initial state. The examples generally exhibited excellent colloidal stability, with Examples 1 and 3 showing particularly excellent stability. In the case of Comparative Example 2, a layer with separated oil was observed in the upper portion, and while Comparative Example 3 showed good colloidal stability, its transparency was lower compared to the examples, resulting in a poor appearance.

[0096] The user experience evaluation was performed on 10 evaluators and rated on a scale of 0 to 5. The examples were generally evaluated as rolling quickly and having a light user experience, but some evaluators experienced slight skin irritation with Examples 1 and 3. Comparative Examples 1 and 2 exhibited a heavy and slippery user experience. Comparative Example 3 exhibited a light user experience, but skin irritation with a higher intensity of erythema was observed compared to Examples 1 and 3.

[0097] As described above, the present invention has been explained by specific details and limited embodiments; however, this is provided merely to aid in a more comprehensive understanding of the invention, and the invention is not limited to the above embodiments. Those skilled in the art can make various modifications and variations from this description.

[0098] Accordingly, the scope of the present invention is not limited to the described embodiments, and all things equivalent to or having equivalent variations to the claims set forth below, as well as the claims set forth below, shall be considered to fall within the scope of the concept of the present invention.

Claims

Claim 1 An oil gel bead composition comprising oil beads in an oil phase dispersed within a continuous phase aqueous phase, wherein the oil phase comprises two or more hydrophobic polymers and exhibits reversible sol-gel transition behavior in a temperature range of 50 to 120 °C, wherein the aqueous phase comprises an acrylic acid-based polymer and water, wherein the oil phase comprises gel-phase oil beads having an average particle size of 10 μm or more at a temperature below 50 °C, wherein the oil phase comprises a siloxane-based polymer containing amino groups in the side chains of repeating units, and wherein the acrylic acid-based polymer is a crosspolymer of (meth)acrylic acid and C10-C30 alkyl (meth)acrylate. Claim 2 delete Claim 3 In claim 1, the viscosity (η) of the above aqueous phase w ) is the viscosity of the oil phase (η) at a temperature of 50 ℃ or lower. o Oil gel bead composition lower than ) Claim 4 An oil gel bead composition according to claim 1, wherein the oil phase further comprises fatty acids. Claim 5 An oil gel bead composition according to claim 4, wherein the fatty acid is ionically complexed with the amino group of a siloxane-based polymer. Claim 6 An oil gel bead composition according to claim 1, wherein the hydrophobic polymer is one or more combinations selected from the group consisting of vinyl polymers, acrylate polymers, urethane polymers, and hydrophobic modified polysaccharides. Claim 7 An oil gel bead composition according to claim 1, wherein the viscosity of the aqueous phase is 200 cP or higher. Claim 8 An oil gel bead composition according to claim 1, wherein the oil phase comprises a triglyceride-based oil. Claim 9 An oil gel bead composition according to claim 1, wherein the oil phase is included in an amount of 20 to 70 weight% of the total weight of the composition. Claim 10 An oil gel bead composition according to claim 1, wherein the hydrophobic polymer is included in an amount of 1 to 50 parts by weight based on 100 parts by weight of oil included in the oil phase. Claim 11 An oil gel bead composition according to claim 1, wherein the aqueous phase further comprises a polyhydric alcohol selected from the group consisting of one or more of ethylene glycol, propylene glycol, butylene glycol, pentylene glycol, isopentyldiol, hexanediol, ethylhexanediol, methylpropanediol, sorbitol, erythritol, inositol, maltitol, and xylitol. Claim 12 The oil gel bead composition of claim 1, wherein the composition substantially does not contain glycerin. Claim 13 S1) a step of heating an aqueous phase containing an acrylic acid-based polymer and water to a first temperature (T1); S2) a step of heating an oil phase containing two or more hydrophobic polymers and oil to a sol-gel transition temperature (Tc) or higher; S3) a step of introducing and stirring the oil phase into the aqueous phase to prepare an oil dispersion; S4) a step of cooling the oil dispersion to prepare oil gel beads; wherein the oil phase comprises a siloxane-based polymer containing amino groups in the side chains of repeating units, and the acrylic acid-based polymer is a crosspolymer of (meth)acrylic acid and C10-C30 alkyl (meth)acrylate. Claim 14 A method for preparing an oil gel bead composition according to claim 13, wherein in step S2) above, the oil phase further comprises fatty acids. Claim 15 A method for preparing an oil gel bead composition according to claim 13, wherein the oil phase further comprises a protonated acrylic acid-based polymer. Claim 16 A method for preparing an oil gel bead composition according to claim 15, wherein the acrylic acid-based polymer included in the oil phase is included in an amount of 1 to 5 weight percent based on the total weight of the total acrylic acid-based polymer included in the oil capsule bead composition.

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