Cosmetic capsules

The described method for producing cosmetic capsules using a polymer with carboxylic acid groups and multivalent cation carriers addresses toxicity and foreign body sensation issues, resulting in large, stable, and cost-effective capsules.

JP7618336B2Active Publication Date: 2025-01-21LG HOUSEHOLD & HEALTH CARE LTD
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Patent Information

Application Number
JP2022500987
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2019-07-09
Filing Date
2020-07-08
Publication Date
2025-01-21
Estimated Expiration
2040-07-08

AI Technical Summary

Technical Problem

Existing cosmetic capsules face issues with toxicity, stability, size, and foreign body sensation during rupture, and existing alternatives fail to provide a cost-effective, versatile, and large-sized solution.

Method used

A method involving the production of cosmetic capsules using a continuous phase with a polymer having two or more carboxylic acid groups and a dispersed phase with a multivalent cation carrier, followed by pH adjustment and gelation to form an outer wall, ensuring minimal toxicity and reduced foreign body sensation.

Benefits of technology

The method produces cosmetic capsules that are large in size, economical, versatile, and exhibit reduced foreign body sensation upon rupture, while maintaining stability and avoiding toxic substances.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention relates to a method for manufacturing cosmetic capsules. The cosmetic capsules manufactured by the present invention can stably carry active ingredients, and unlike conventional techniques, have the advantages of being large in size and causing little foreign body sensation when burst.
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Description

[Technical field]

[0001] The present invention relates to a method for producing capsules for cosmetics, and relates to capsules for cosmetics that can stably carry active ingredients, have a large size unlike conventional techniques, and cause little foreign body sensation when burst. [Background technology]

[0002] Encapsulation is known as a method for solving the problem that active ingredients lose their inherent properties due to factors such as light and heat during storage of cosmetics, or the concentration decreases due to physical phenomena such as evaporation, resulting in a decrease in activity. Such encapsulation has the advantage of not only increasing the stability of the active ingredients, but also allowing users to activate the active ingredients at the time they want, and is therefore used in many industrial fields. Representative methods for activating encapsulated active ingredients include a method in which the outer wall of the capsule is destroyed by factors such as pressure, or a method in which small holes are formed in the outer wall of the capsule, thereby gradually releasing or sustaining the active ingredients.

[0003] Melamine-formaldehyde resin-based capsules are widely used commercially, but there is a problem with them because the toxic substance formaldehyde is present during the manufacturing process of microcapsules. As a result, interest is growing in new capsules that do not contain formaldehyde.

[0004] As a solution to this problem, liposome capsules, coacervation, microsponges, etc. have been proposed. However, these methods reach a limit where the stability of the capsule is reduced due to the surfactants and ionic components in the dosage form, the carrying capacity of the active ingredient is reduced, or the release is not controlled. Therefore, they are not sufficient to replace Melamine capsules.

[0005] Capsules based on inorganic materials such as silica have been proposed as a new alternative, but as the amphiphilicity of the central substance increases, it becomes difficult to form an outer wall after the precursor organopolysiloxane migrates to the interface, so there are problems with their widespread application.In addition, they have the disadvantage of being difficult to control the activation level of the active ingredient due to their low elasticity and high hardness.

[0006] Meanwhile, capsules based on organic polymers, such as polyacryl, polyurea, and polyurethane, which are widely used in industry, are considered as alternatives due to their advantages of not using formaldehyde in the polymerization process, their wide versatility, and their excellent economical efficiency. However, the high elasticity of the polymers themselves reduces their cracking resistance under pressure, making it difficult to activate the organic components.

[0007] In addition to the above problems, the cosmetic industry is trying to manufacture capsules with a diameter of 100 μm or more in order to improve the aesthetic effect of the product and the visual satisfaction of consumers. However, when using a general manufacturing method, the amount of outer wall material used during capsule manufacturing increases, which acts as a foreign body sensation when the capsule bursts, resulting in a decrease in consumer satisfaction.

[0008] Therefore, there is a need to develop a cosmetic capsule material that contains few toxic substances, is highly versatile, is economical, has a large size, and causes little foreign body sensation when burst. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Republic of Korea Patent Publication No. 10-2011-0084151 Summary of the Invention [Problem to be solved by the invention]

[0010] In order to solve the above problems, the present invention aims to provide a method for manufacturing capsules for cosmetics that contain few toxic substances, are highly versatile, are economical, have a large size, and cause little foreign body sensation when burst. [Means for solving the problem]

[0011] The present invention relates to a method for preparing an emulsion by mixing a continuous phase containing a polymer having two or more carboxylic acid groups and a dispersed phase containing a polyvalent cation carrier; and The method for producing capsules for cosmetics includes adjusting the pH of the emulsion to 10 or less and then gelling the emulsion. Effect of the Invention

[0012] The present invention can provide a capsule for cosmetics that contains few toxic substances, is highly versatile, is economical, has a large size, and causes little foreign body sensation when burst.

[0013] Furthermore, in the present invention, a natural polymer containing two or more carboxylic acid groups is used as the outer wall material of the capsule, so that an environmentally friendly cosmetic capsule can be provided. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a schematic diagram showing the manufacturing principle of cosmetic capsules according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] The configuration of the present invention will be described below using specific examples.

[0016] The present invention relates to a method for producing capsules for cosmetics.

[0017] The present invention makes it possible to produce capsules for cosmetics that contain little toxic substances, are highly versatile, are economical, have a large size, and cause little foreign body sensation when burst.

[0018] The cosmetic capsules can be prepared by mixing a continuous phase containing a polymer having two or more carboxylic acid groups and a dispersed phase containing a polyvalent cation carrier to prepare an emulsion; and The emulsion may be prepared by adjusting the pH of the emulsion to 10 or less and then subjecting it to a gelation process.

[0019] In one embodiment, the cosmetic capsule according to the present invention can be prepared by the steps of: preparing a continuous phase comprising a polymer having two or more carboxylic acid groups (hereinafter, step 1); preparing a dispersed phase comprising a polyvalent cation carrier (hereinafter, step 2); mixing the continuous phase and the dispersed phase to form an emulsion (hereinafter, step 3); and The emulsion may be prepared by adjusting the pH to 10 or less and then subjecting it to gelation (hereinafter, step 4).

[0020] In the present invention, step 1 is a step of preparing a continuous phase. The continuous phase refers to a material that is maintained in a liquid state at room temperature, and generally refers to one or more solvents used in the process.

[0021] In the present invention, the continuous phase includes a polymer having two or more carboxylic acid groups. The polymer having two or more carboxylic acid groups can act as a material for forming the capsule outer wall formed during the gelation process described below. Specifically, the polymer having two or more carboxylic acid groups can increase the dispersion stability of the emulsion at the interface of the emulsion formed by mixing with the dispersed phase, and can form the outer wall through ionic bonds by meeting with cations during the gelation process.

[0022] In one embodiment, the polymer having two or more carboxylic acid groups may include a compound represented by Formula 1 below.

[0023] [ka]

[0024] In the formula 1, R may include at least one selected from the group consisting of alkylene having 1 to 50 carbon atoms and cyclic hydrocarbon having 3 to 60 carbon atoms.

[0025] The term "alkylene" means, unless otherwise specified, a straight or branched chain saturated or unsaturated hydrocarbon having a specified number of carbon atoms. The term "cyclic hydrocarbon" means, unless otherwise specified, a cyclic saturated or unsaturated hydrocarbon having a specified number of carbon atoms. The cyclic hydrocarbon may include aromatic compounds.

[0026] In one embodiment, the alkylene having 1 to 50 carbon atoms or the cyclic hydrocarbon having 3 to 60 carbon atoms may or may not contain one or more carboxylic acid groups and / or one or more heteroatoms.

[0027] In one specific example, the alkylene having 1 to 50 carbon atoms may specifically be an alkylene having 1 to 30 carbon atoms, and the cyclic hydrocarbon having 3 to 60 carbon atoms may specifically be a cyclic saturated hydrocarbon or unsaturated hydrocarbon (aromatic hydrocarbon) having 3 to 60 carbon atoms.

[0028] In one embodiment, the polymer of Formula 1 may include at least one selected from the group consisting of sodium alginate, sodium acrylate, sodium carbomer, sodium acrylates / C10-30 alkyl acrylate crosspolymer, and sodium carboxymethyl cellulose.

[0029] In one embodiment, the polymer having two or more carboxylic acid groups may be included in an amount of 0.001 to 30 parts by weight, 0.01 to 10 parts by weight, 0.05 to 5 parts by weight, or 0.1 to 1 parts by weight based on the total weight (100 parts by weight) of the continuous phase. If the content of the polymer having two or more carboxylic acid groups is less than 0.001 parts by weight, a problem of emulsion formation may occur, and if it exceeds 30 parts by weight, a problem of high viscosity may occur. In addition, the polymer may be included in an amount of 0.001 to 100 parts by weight, 0.005 to 75 parts by weight, 0.01 to 50 parts by weight, or 1 to 10 parts by weight based on the total weight (100 parts by weight) of the dispersed phase.

[0030] In one specific example, the solvent for the continuous phase is not particularly limited as long as it can dissolve a polymer having two or more carboxylic acid groups, and water can be used in the present invention.

[0031] In the present invention, step 2 is a step of preparing a dispersed phase. The dispersed phase refers to a material that is maintained in a liquid state at room temperature, and generally refers to one or more of the solvents used in the process.

[0032] In the present invention, the dispersed phase contains a polyvalent cation carrier, which is capable of releasing polyvalent cations at a pH of 10 or less during the gelation process described below. Specifically, the polyvalent cation carrier can be dispersed in the dispersed phase, and then reacts with a polymer having two or more carboxylic acid groups when the pH is lowered to release the polyvalent cations that form the capsule outer wall.

[0033] In one embodiment, the multivalent cation is a cation having two or more charges, such as H + The polyvalent cation may link two or more carboxylic acid groups that have been dissociated with an ion. The polyvalent cation is an element that has two or more charges when ionized, and may be selected from alkaline earth metals, semimetallics, transition metals, lanthanides, and actinides, including, but not limited to, Mg 2+ , Al 3+ , Ca2+ , Zn 2+ , B.A. 2+ and Sr 2+ etc. may be selected.

[0034] In one embodiment, the polyvalent cation carrier may be classified into, but is not limited to, silicate compounds, oxide compounds, and salt compounds containing polyvalent cations.

[0035] The silicate compound refers to a compound containing a polyvalent cation in its chemical formula and containing an Si element and an O element. The silicate compound can release the polyvalent cation through an acid-base reaction or an oxidation-reduction reaction under a condition of pH 10 or less. Examples of such silicate compounds include aluminum calcium magnesium potassium sodium zinc silicate, aluminum calcium sodium silicate, aluminum iron calcium magnesium germanium silicate, aluminum iron calcium magnesium zirconium silicate, aluminum iron silicate, aluminum silicate, ammonium fluorosilicate, ammonium silver zinc aluminum silicate, calcium aluminum borosilicate, calcium magnesium silicate, calcium ... Silicate, Calcium Sodium Borosilicate, Calcium Sodium Phosphosilicate, Calcium Titanium Borosilicate, C24-28 Alkyldimethylsiloxy Trimethylsiloxysilicate, Lithium Magnesium SilicateSilicate, Lithium Magnesium Sodium Silicate, Magnesium Aluminometasilicate, Magnesium Aluminum Silicate, Magnesium Fluorosilicate, Magnesium Potassium Fluorosilicate, Magnesium Silicate, Magnesium Sodium Fluorosilicate, Magnesium Trisilicate, Silver Borosilicate, Sodium Magnesium Aluminum Silicate, Sodium Magnesium Fluorosilicate, Sodium Magnesium Silicate, Sodium Potassium Aluminum Silicate The silicate may be at least one selected from the group consisting of zinc borosilicate, zinc silicate, aluminum silicate, zirconium silicate, and the like.

[0036] The oxide compound means a compound containing a polyvalent cation in its chemical formula and containing an O element. The oxide compound can release a polyvalent cation through an acid-base reaction or an oxidation-reduction reaction under a condition of pH 10 or less. Such oxide compounds include aluminum / calcium / magnesium oxide, barium / calcium / silicon / titanium oxide, calcium cerium oxide, calcium oxide, calcium peroxide, aluminum magnesium oxide, magnesium / manganese / titanium oxide, magnesium / potassium / silicon / fluoride / hydroxide / oxide, magnesium / potassium / titanium oxide, sodium phosphorus / zinc / calcium / silicon / aluminum / silver oxide, sodium phosphate ... One or more selected from the group consisting of phosphorus / zinc / calcium / silicon / aluminum / silver oxides, magnesium oxide, and magnesium peroxide can be used.

[0037] In addition, the salt compound means a substance that contains a polyvalent cation in its chemical formula and an anion that forms a complex with the polyvalent cation to make the total charge 0. The salt compound can release the polyvalent cation through an acid-base reaction or dissociation under conditions of pH 10 or less. Examples of anions that can be used in such salt compounds include fluoride, chloride, bromide, iodide, sulfide, sulfate, carbonate, phosphate, hydroxide, pantothenate, acetate, alginate, ascorbate, aspartate, behenate, benzoate, carboxymethyl cellulose, and cellulose acetate. Cellulose, Carnaubate, Carrageenan, Caseinate, Citrate, Cyclamate, EDTA, DNA, Dodecylbenzenesulfonate, Ferrite, Fructoborate, Fructoheptonate, Glucoheptonate ucoheptonate, Gluconate, Glycerophosphate, Glycinate, Hydroxyapatite, Hydroxymethionine, Hypochlorite, Ketogluconate, Lactate, Laurate, Lauroyl TaurateTaurate, Lignosulfonate, Monofluorophosphate, Montanate, Myristate, Pantetheine Sulfonate, Pantothenate, Paraben, PCA, Phosphoryl Oligosaccharides, Polygamma-Glutamate, Polyglutamate, Polyoxymethylene Pyrrolidone, Carbomer, Propionate, RNA, Salicylate, Beta-Sitosteryl Sulfate, PVM / MA Copolymer (PVM / MA) The surfactant may be at least one selected from the group consisting of starch copolymer, sorbate, starch isododecenylsuccinate, starch octenylsuccinate, stearate, stearoyl lactylate, tartrate, thioglycolate, titanate, trifluoroacetate, undecylenate, xylenesulfonate, azelate, and acrylate copolymer.

[0038] In one embodiment, the diameter of the polyvalent cation mediator may be 1 nm to 500 μm, 1.5 nm to 250 μm, or 2 nm to 100 μm.

[0039] In one embodiment, the polyvalent cation carrier may be a polyvalent cation carrier surface-treated with a surface treatment compound. In the present invention, the polyvalent cation carrier may be surface-treated to allow uniform dispersion in the dispersed phase. In this case, the surface treatment compound may be a non-covalent surface treatment compound such as cetyltrimethylammonium bromide, cetyltrimethylammonium chloride, distearyldimonium chloride, and aluminum stearate; or a covalent surface treatment compound such as a halosilane-based compound or an alkoxysilane.

[0040] In one embodiment, the content of the polyvalent cation carrier may be 0.002 to 30 parts by weight, 0.006 to 25 parts by weight, or 0.011 to 20 parts by weight based on the total weight (100 parts by weight) of the dispersed phase. If the content of the polyvalent cation carrier is less than 0.002 parts by weight, a problem may occur in which capsules are not formed, and if it exceeds 30 parts by weight, a problem may occur in which capsules that have a foreign body feel are formed due to a fast reaction.

[0041] In one embodiment, the solvent of the dispersed phase is not particularly limited as long as it is a solvent that is not mixed with the continuous phase. When water is used as the solvent of the continuous phase, the solvent of the dispersed phase may be one or more selected from the group consisting of hydrocarbon series solvents, solvents containing an ether group, solvents containing an ester group, solvents containing a ketone group, solvents containing benzene, haloalkane series solvents, and silicone series solvents.

[0042] The hydrocarbon series solvent may be selected from compounds having linear or nonlinear structures such as pentane, hexane, cyclohexane, heptane, octane, isododecane, and dodecane. The solvent containing an ether group may be selected from ethyl ether, butyl ether, and methyl-t-butyl ether. The solvent containing an ester group may be selected from ethyl acetate, butyl acetate, and ethyl butyrate. The solvent containing a ketone group may be selected from methyl ethyl ketone. The solvent may be ketone, the benzene-containing solvent may be selected from benzene, toluene, and xylene, the haloalkane-series solvent may be selected from dichloromethane, dichloroethane, chloroform, and carbon tetrachloride, and the silicone-series solvent may be selected from dimethicone and cyclomethicone.

[0043] In one embodiment, the dispersed phase of the present invention may further include an active ingredient in addition to the polyvalent cation carrier. The active ingredient is a substance whose activity is desired to be maintained by the produced capsule, and the active ingredient may subsequently exhibit its activity when the outer wall of the capsule is destroyed. If the active ingredient is liquid at room temperature, it may replace the dispersed phase, which is a solvent, or if not, it may change depending on its solubility. As such a solvent, one or more selected from the group consisting of fragrances, dyes, catalysts, antioxidants, and drugs may be used.

[0044] In the present invention, step 3 is a step of mixing the continuous phase and the dispersed phase to form an emulsion.

[0045] In one embodiment, the content of the dispersed phase may be 1 to 90 parts by weight, 2 to 85 parts by weight, or 3 to 80 parts by weight based on the combined weight (100 parts by weight) of the dispersed phase and the continuous phase.

[0046] In one embodiment, the step can be carried out by adding the dispersed phase to the continuous phase and can be carried out under stirring.

[0047] In one embodiment, the stirring may be performed at 20 to 30° C. or at room temperature at 1 to 16,000 RPM, 5 to 13,000 RPM, or 10 to 10,000 RPM.

[0048] In one embodiment, the step may be carried out at a pH of 7-12.

[0049] In one embodiment, the size of the emulsion produced may be greater than 100 μm.

[0050] In the present invention, step 4 is a step of adjusting the pH of the emulsion to 10 or less and then gelling it.

[0051] Through the above steps, a capsule for cosmetics can be manufactured. Specifically, as shown in FIG. 1, the capsule is formed at the interface formed after mixing the continuous phase and the dispersed phase. At the interface, the polymer having two or more carboxylic acid groups reacts (gelates) with the polyvalent cations released from the polyvalent cation carrier to form the capsule outer wall. In the present invention, the gelation speed can be adjusted to improve the foreign body sensation of the capsule.

[0052] In one embodiment, the polyvalent cation carrier releases polyvalent cations under a pH condition of 10 or less, and the released polyvalent cations and a polymer having two or more carboxylic acid groups gradually gel at the interface, thereby forming a capsule for cosmetics that is less toxic and has high versatility and is economical. In particular, in the present invention, since the polyvalent cations are released due to a drop in the pH of the continuous phase and the gelation process is slow, an outer wall that is weak but can stabilize the interface can be formed, thereby making it possible to produce a capsule that gives little foreign body sensation.

[0053] In one embodiment, the step may be performed at a pH below 10, a pH between 1 and 10, 2 and 9, or 3 and 8. Also, the time interval between step 3, emulsion formation and lowering the pH to form the capsule outer wall, may be 1 to 120 minutes, 2 to 90 minutes, or 3 to 60 minutes.

[0054] In one embodiment, gelation for producing capsules may be carried out at 0-100°C for 1-1440 minutes, at 10-90°C for 2-720 minutes, or at 20-80°C for 3-360 minutes.

[0055] In one embodiment, the gelation may be performed under stirring, and the stirring may be performed at 1 to 6000 RPM, 5 to 5000 RPM, or 10 to 4000 RPM.

[0056] Under these conditions, polyvalent cations are released due to a drop in pH at the interface between the continuous phase and the dispersed phase, and an outer wall can be formed through gelation.

[0057] In one embodiment, the gelation may be carried out in the presence of a dispersion stabilizer, which may be used to improve the dispersibility of the capsules produced after the reaction. Examples of the dispersion stabilizer include at least one selected from the group consisting of gum arabic, polysaccharides, pectin, alginate, arabinogalactan, carrageenan, gellan gum, xanthan gum, guar gum, acrylate / acrylic polymers, starch, water-swellable clay, acrylate / aminoacrylate copolymers and mixtures thereof, maltodextrin; natural gums, such as alginate esters; gelatin, protein hydrolysates and their quaternized forms; synthetic polymers and copolymers, such as poly(vinylpyrrolidone-co-vinyl acetate), poly(vinyl alcohol-co-vinyl acetate), poly(maleic acid), poly(alkylene oxide), poly(vinyl methyl ether), poly(vinyl ether-co-maleic anhydride), as well as poly(ethyleneimine), poly((meth)acrylamide), poly(alkylene oxide-co-dimethylsiloxane), poly(aminodimethylsiloxane), etc.

[0058] In the present invention, the method may further include a step of hardening the outer wall of the formed capsule after gelation, where the hardening time may be 5 minutes to 48 hours, 7 minutes to 36 hours, or 10 minutes to 24 hours.

[0059] In the present invention, if necessary, a step of concentrating and / or drying the produced cosmetic capsules can be further carried out.

[0060] In addition, the pH can be adjusted using an acid or a base, and the conditions are not limited. In addition, in the above process, a process can be carried out in which preservatives, moisturizers, whitening ingredients, wrinkle improvement ingredients, and other ingredients required for cosmetics are dissolved in the external phase and added, and the conditions are not limited.

[0061] The present invention also relates to cosmetic capsules manufactured by the above-mentioned method for manufacturing cosmetic capsules.

[0062] The diameter of the cosmetic capsule according to the present invention may be 10 μm to 10,000 μm, 50 to 5,000 μm, or 100 to 1000 μm.

[0063] The capsule wall thickness may be 0.05 to 100 μm.

[0064] <Mode for carrying out the invention> The present invention will be described in detail with reference to the following examples. The following examples are merely illustrative of the present invention, and the scope of the present invention is not limited to the following examples. The following examples are provided to fully disclose the present invention and to fully inform those skilled in the art of the present invention of the scope of the invention, and the present invention is defined by the scope of the claims.

[0065] <Example> Examples 1 to 11. Preparation of capsules using polymers having two or more carboxylic acid groups and polyvalent cation carriers

[0066] Cosmetic capsules were produced using the ingredients in Tables 1 and 2 and the method described below.

[0067] Step 1: A polymer having two or more carboxylic acid groups was dispersed in 89.8 g of distilled water to prepare a continuous phase.

[0068] Step 2: 0.1 g of a polyvalent cation carrier was added to 9.9 g of dodecane to prepare a dispersed phase.

[0069] Step 3: The dispersed phase was gradually added to the continuous phase at 50 RPM to prepare an emulsion. Then, the pH was lowered to below 10, and gelation was carried out for 30 minutes to prepare capsules for cosmetics.

[0070] <Comparative Example 1> Cosmetic capsules were produced using the ingredients in Table 1 and the method described below.

[0071] Step 1: Sodium alginate was added to 80 g of distilled water to prepare a continuous phase.

[0072] Second stage: 9.9 g of dodecane was prepared as the dispersed phase.

[0073] Step 3: The dispersed phase was gradually added to the continuous phase at 50 RPM to prepare an emulsion. Then, a solution of calcium chloride (CaCl2) dissolved in 9 g of distilled water was added to the emulsion, and gelation was carried out for 30 minutes to prepare capsules for cosmetics.

[0074] <Comparative Example 2> Cosmetic capsules were produced using the ingredients in Table 1 and the method described below.

[0075] Step 1: Sodium alginate was added to 89.8 g of distilled water to prepare a continuous phase.

[0076] Second stage: 9.9 g of dodecane was prepared as the dispersed phase.

[0077] Step 3: The dispersed phase was gradually added to the continuous phase at 50 RPM to produce an emulsion. Magnesium aluminum silicate was then added, the pH was lowered to below 10, and gelation was carried out for 30 minutes to produce capsules for cosmetics.

[0078] [Table 1]

[0079] [Table 2]

[0080] <Experimental Example 1. Comparison of size and foreign body sensation of cosmetic capsules> The cosmetic capsules produced in Examples 1 to 11 and Comparative Examples 1 and 2 were measured for size, foreign body sensation, and stability.

[0081] Capsule size was measured using Malvern's Mastersizer 3000. Foreign body sensation was evaluated by 20 experienced panelists on a scale of 1 (lowest foreign body sensation) to 10 (highest foreign body sensation), and the average scores were used to compare the foreign body sensation of each manufacturing method. Stability was also compared by measuring the change in capsule size and the amount of oil in the capsules (using LC-MS) after storage at 40℃ for one month.

[0082] The measurement results are shown in Tables 3 and 4.

[0083] [Table 3]

[0084] [Table 4]

[0085] As shown in Tables 3 and 4, the capsules produced in Comparative Example 1, which is a general capsule production method, had a foreign body sensation and were small in size. Also, in Comparative Example 2, no capsules were produced.

[0086] In Examples 1 to 11 according to the present invention, capsules with a size of 100 μm or more were produced. The capsules of the Examples showed a lower foreign body sensation than those of Comparative Example 1, which is a general capsule production method. In addition, it can be confirmed that the capsules have high stability because there is little change in size and oil content during long-term storage. [Industrial Applicability]

[0087] The present invention can provide a capsule for cosmetics that contains little toxic substances, is highly versatile, is economical, has a large size, and causes little foreign body sensation when burst.

Claims

1. preparing an emulsion by mixing a continuous phase containing a polymer having two or more carboxylic acid groups and a dispersed phase containing a polyvalent cation carrier; and adjusting the pH of the emulsion to 10 or less and then gelling the emulsion; The method for manufacturing capsules for cosmetics, wherein the polyvalent cation carrier comprises at least one selected from the group consisting of silicate compounds and oxide compounds containing polyvalent cations.

2. 2. The method of claim 1, wherein the content of the polymer having two or more carboxylic acid groups is 0.001 to 30 parts by weight based on the total weight of the continuous phase.

3. The method for producing capsules for cosmetics according to claim 1, wherein the solvent of the continuous phase is water.

4. 2. The method for producing capsules for cosmetics according to claim 1, wherein the polyvalent cation transmitter is a compound which releases polyvalent cations at a pH of 10 or less.

5. 2. The method of claim 1, wherein the content of the polyvalent cation carrier is 0.002 to 30 parts by weight based on the total weight of the dispersed phase.

6. 2. The method for producing capsules for cosmetics according to claim 1, wherein the solvent of the dispersed phase comprises at least one selected from the group consisting of: a hydrocarbon series solvent; a solvent containing an ether group; a solvent containing an ester group; a solvent containing a ketone group; a solvent containing benzene; a haloalkane series solvent; and a silicone series solvent.

7. The dispersed phase further comprises an active ingredient, The method for manufacturing capsules for cosmetics according to claim 1, wherein the active ingredient comprises at least one selected from the group consisting of fragrances, dyes, catalysts, antioxidants and drugs.

8. The method for producing capsules for cosmetics according to claim 1, characterized in that the production of the emulsion is carried out under conditions of 1 to 16,000 RPM.

9. The method for preparing capsules for cosmetics according to claim 1, wherein the gelation is carried out under the conditions of 0-100° C., 1-1440 minutes, and 1-6000 RPM.

Citation Information

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