Composition of a highly elastic and highly rigid liquid crystal cosmetic and method for producing the same

Abstract

To provide a liquid crystal cosmetic composition having high hardness and characterized by a texture with a feeling of elasticity, and a method for producing the same. The liquid crystal cosmetic composition according to one embodiment of the present invention forms a liquid crystal cosmetic composition with high hardness and elasticity by selectively mixing and using a viscosity modifier, and contains a low concentration of oil, which gives a more moist feeling than existing liquid crystal cosmetic compositions, and has a refreshing and light feel when used.

Description

Technical Field

[0001] The present invention relates to a composition of a high-hardness liquid crystal cosmetic characterized by a texture with a sense of elasticity and a method for producing the same.

Background Art

[0002] Generally, liquid crystal is an intermediate state between a solid and a liquid. In organic molecules having both a hydrophilic part and a lipophilic part, the hydrophilic parts are arranged among themselves, and the lipophilic parts are arranged among themselves to form a lamellar structure in which a plurality of layers are formed in a certain arrangement. Liquid crystal behaves like a liquid in terms of viscosity and fluidity, but shows unique properties such as exhibiting the physical properties of a solid in physical properties such as light scattering and reflection, and has a wide range of applications in many fields such as cosmetics, pharmaceuticals, foods, and the electronics industry. In the fields of cosmetics and pharmaceuticals, liquid crystal is generated at the interface during the production of emulsions to stabilize the emulsions, and has a structure similar to that of the lipid between biological cell membranes, so that it can not only form a skin protection film and have a moisturizing function, but also improve the storage stability of various water-soluble and oil-soluble medicinal components and be applied as an effective transmission medium for them.

[0003] Under such a technical background, research for diversifying liquid crystal dosage forms has been actively carried out (Korean Registered Patent 10-0713564), but at present, most are general O / W emulsifying creams, and the diversification of dosage forms is insufficient.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The technical problem to be solved by the present invention is to provide a composition of a liquid crystal cosmetic containing 5 to 10 parts by weight of a liquid crystal forming agent and 0.05 to 1 part by weight of a viscosity modifier with respect to 100 parts by weight of the whole composition.

[0005] Another technical problem to be solved by the present invention is to provide a method for manufacturing a liquid crystal cosmetic composition including a step of adding a viscosity modifier to an aqueous phase portion and a step of mixing a liquid crystal forming agent with the aqueous phase portion to which the viscosity modifier has been added.

Means for Solving the Problems

[0006] One aspect provides a liquid crystal cosmetic composition including 5 to 10 parts by weight of a liquid crystal forming agent and 0.05 to 1 part by weight of a viscosity modifier with respect to 100 parts by weight of the whole composition.

[0007] In one specific example, the liquid crystal cosmetic composition is a high-hardness liquid crystal cosmetic composition characterized by a feeling of moisture and elasticity.

[0008] The liquid crystal forming agent is composed of one or more selected from the group consisting of higher aliphatic alcohols, nonionic surfactants, and oils.

[0009] The higher aliphatic alcohol may be one or more selected from the group consisting of C 12 - 16 alcohol, C 14 - 22 alcohol, cetearyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, and myristyl alcohol, but is not limited thereto.

[0010] The nonionic surfactant may be one or more selected from the group consisting of cetearyl glucoside, cetearyl olive oil fatty acid, sorbitan olive oil fatty acid, sorbitan palmitate, sucrose polystearate, C 12 - 20 alkyl glucoside, polyglyceryl-3 methylglucose distearate, and hydrogenated lecithin, but is not limited thereto.

[0011] The oil can be one or more selected from the group consisting of dicaprylyl carbonate, ethylhexyl palmitate, neopentyl glycol dicaprylate, cetyl ethylhexanoate, dicaprylyl ether, pentaerythrityl tetraethylhexanoate, pentaerythrityl tetraisostearate, (caprylic acid / capric acid)coconut alkyl, glyceryl tri(caprylic acid / capric acid), and ethylhexyl stearate, but is not limited thereto.

[0012] The liquid crystal former is contained in an amount of 5 to 10 parts by weight, desirably 7 to 10 parts by weight, more desirably 7.5 to 9.5 parts by weight, and even more desirably 8 to 9 parts by weight based on 100 parts by weight of the total composition. At this time, when the content of the liquid crystal former is less than 5 parts by weight, the effect of liquid crystal formation cannot be exerted, and when it exceeds 10 parts by weight, there is a problem that the liquid crystal structure disappears over time due to the high proportion of the oil phase, which harms the dosage form stability.

[0013] The viscosity regulator can be two or more selected from the group consisting of (acrylates / alkyl acrylates (C 10 - 30 )) cross-polymer, (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymer, carbomer, (ammonium acryloyldimethyltaurate / VP) copolymer, polyacrylate cross-polymer-11, and sodium polyacryloyldimethyltaurate. When only one kind is used as the viscosity regulator, liquid crystals may not be formed, the usability may decrease, or the dosage form stability may decrease. [[ID=]13]

[0014] The viscosity regulator is a combination of (acrylates / alkyl acrylates (C 10 - 30 )) cross-polymer and carbomer. As the viscosity regulator, (acrylates / alkyl acrylates (C 10 - 30)) When using the cross-polymer alone, the formation of the liquid crystal may not be clear, the elasticity may decrease, the moisture feeling may be insufficient, and the usability may deteriorate. Or when storing at high temperature for one month, a decrease in hardness may be confirmed and the dosage form stability may not be good. When using carbomer alone as the viscosity regulator, a stable emulsion and liquid crystal with high viscosity may not be formed, the hardness may be too high to be applied to the skin, or a separation phenomenon may be confirmed at normal temperature and high temperature, and the dosage form stability may not be good. In contrast, when using a combination of (acrylates / alkyl acrylate (C 10 - 30 )) cross-polymer and carbomer, a stable liquid crystal with a clear form is formed, a cosmetic composition with high hardness and a felt elasticity is produced, and it has excellent dosage form stability at high and low temperatures for a long period.

[0015] The mixing weight ratio of the above-mentioned (acrylates / alkyl acrylate (C 10 - 30 )) cross-polymer and carbomer is 1 to 10: 1 to 10, 1 to 5: 1 to 5, 1 to 4: 1 to 4, 1 to 3: 1 to 3, or 1 to 2: 1 to 2.

[0016] The viscosity regulator is contained in an amount of 0.05 to 1 part by weight, preferably 0.1 to 1 part by weight, more preferably 0.3 to 0.7 part by weight, and even more preferably 0.4 to 0.6 part by weight based on 100 parts by weight of the entire composition. At this time, when the content of the viscosity regulator is less than 0.05 part by weight, the thickening effect cannot be exerted. When it exceeds 1 part by weight, it is not only difficult to ensure the long-term stability of the dosage form, but also the moisture feeling of the composition decreases, the usability deteriorates, and the elastic feeling, which is a characteristic of the composition, disappears, making it difficult to differentiate from a general balm-type dosage form.

[0017] The composition has a hardness of 80 to 150 dyne / cm 2 .

[0018] When within the above hardness range, it exhibits excellent usability when applied to the skin. When the hardness is 80 dyne / cm 2If it is less than 150 dyne / cm, the fluidity becomes excessive, harming the elasticity or resilience of the dosage form, and thereby making it difficult to feel the excellent usability due to the elastic and moist feelings. 2 If it exceeds 2 , there are problems that not only is stirring not easy and manufacturing difficult, but also the hardness is too high to be applied to the skin.

[0019] In addition, the cosmetic composition may further contain components usually added to cosmetic compositions, such as ordinary adjuvants and carriers like antioxidants, stabilizers, solubilizers, vitamins, pigments, and fragrances.

[0020] The cosmetic composition is manufactured into any dosage form usually manufactured in the industry. For example, it is formulated into solutions, suspensions, emulsions, pastes, gels, creams, lotions, powders, soaps, cleansing containing surfactants, oils, powder foundations, emulsion foundations, wax foundations, and sprays, etc., but is not limited thereto. More specifically, it is manufactured into dosage forms such as lotions like softening lotion or nutritive lotion, emulsions like facial lotion or body lotion, creams like nutritive cream, moisture cream, eye cream, essences, cosmetic ointments, sprays, gels, packs, sunscreens, makeup bases, liquid type, solid type, or spray type foundations, powders, etc. In this case, the cosmetic composition contains excipients including emulsifiers, soaps, solvents, colorants, preservatives, antioxidants, antifoaming agents, antibacterial agents, anti-redeposition agents, enzymes, animal or vegetable oils, fats, fluorescent substances, fungicides, water-repellent inducing substances, moisturizers, fragrances, fragrance carriers, preservatives, proteins, silicones, solubilizers, sugar derivatives, sunscreen agents, vitamins, plant extracts, waxes, etc.

[0021] When the dosage form of the cosmetic composition is a paste, cream, or gel, animal oils, vegetable oils, waxes, paraffins, starches, tragacanth, cellulose derivatives, polyethylene glycols, silicones, bentonite, silica, talc, or zinc oxide, etc. are used as carrier components.

[0022] When the dosage form of the cosmetic composition is powder or spray, lactose, talc, silica, aluminum hydroxide, calcium silicate or polyamide powder is used as the carrier component. In particular, when it is a spray, it further contains a propellant such as chlorofluorohydrocarbon, propane / butane or dimethyl ether.

[0023] When the dosage form of the cosmetic composition is a solution or emulsion, a solvent, solubilizer or emulsifier is used as the carrier component. For example, there are water, ethanol, isopropanol, ethyl carbonate, ethyl acetate, benzyl alcohol, benzyl benzoate, propylene glycol, 1,3-butyl glycol oil, glycerol fatty acid ester, polyethylene glycol or sorbitan fatty acid ester.

[0024] When the dosage form of the cosmetic composition is a suspension, a diluent of the liquid phase such as water, ethanol or propylene glycol, a suspending agent such as ethoxylated isostearyl alcohol, polyoxyethylene sorbitol ester and polyoxyethylene sorbitan ester, microcrystalline cellulose, aluminum metahydroxide, bentonite, agar or tragacanth is used.

[0025] The cosmetic composition is applied by applying an appropriate amount to the skin according to the skin area to be applied, and can be used repeatedly once to several times a day as necessary. Also, the amount and frequency of application can be increased or decreased as necessary depending on an individual's skin condition, age, etc.

[0026] Another aspect provides a method for producing a liquid crystal cosmetic composition, including the step of adding a viscosity modifier to the aqueous phase part, and

[0027] the step of mixing a liquid crystal former into the aqueous phase part to which the viscosity modifier has been added.

[0028] In a specific example, the method for manufacturing the composition of the liquid crystal cosmetic is carried out in the order of first adding a viscosity modifier to the aqueous phase part and then adding the oil phase to form a liquid crystal, and the resulting cosmetic composition is characterized by having a high-hardness dosage form. Through the above method, a high-hardness dosage form can be realized with only a viscosity modifier and a small amount of oil phase, and the resulting cosmetic composition has less wax and oil content compared to a general high-hardness dosage form, is excellent in the elastic force of the dosage form, and is also characterized by a light feeling in use.

[0029] The liquid crystal former may be two or more selected from the group consisting of C 12 - 16 alcohol, C 14 - 22 alcohol, palmitic acid, hydrogenated lecithin, cetearyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, sorbitan olive oil fatty acid, sorbitan palmitate, tri(caprylic acid / capric acid) glyceryl, and ceramide NP, but is not limited thereto.

[0030] The viscosity modifier may be two or more selected from the group consisting of (acrylates / acrylic acid alkyl (C 10 - 30 )) cross polymer, (hydroxyethyl acrylate / sodium acryloyldimethyltaurate) copolymer, carbomer, (ammonium acryloyldimethyltaurate / VP) copolymer, polyacrylate cross polymer-11, and sodium polyacryloyldimethyltaurate, but is not limited thereto.

[0031] The viscosity modifier is a combination of (acrylates / acrylic acid alkyl (C 10 - 30 )) cross polymer and carbomer.

[0032] The liquid crystal former is contained in an amount of 5 to 10 parts by weight based on 100 parts by weight of the total composition, and the viscosity modifier is contained in an amount of 0.05 to 1 part by weight based on 100 parts by weight of the total composition.

[0033] Further, the method for manufacturing the composition of the liquid crystal cosmetic further includes a step of adding a neutralizing agent to the emulsified emulsion formed by mixing a liquid crystal forming agent in the aqueous phase. The neutralizing agent is, for example, tromethamine, but is not limited thereto, and any neutralizing agent commonly used in the art can be used without limitation.

[0034] Regarding the viscosity modifier and the liquid crystal forming agent, the description of the part overlapping with the composition of the liquid crystal cosmetic is omitted.

Advantages of the Invention

[0035] The composition of the liquid crystal cosmetic according to one aspect of the present invention forms a composition of a liquid crystal cosmetic with high hardness having a resilient feeling by selectively mixing and using a viscosity modifier, contains a low-concentration oil, and has a smoother and lighter feel in use with a sense of moisture more felt than existing liquid crystal cosmetic compositions.

Brief Description of the Drawings

[0036] [Fig. 1] It is a result showing how the liquid crystal of the composition of the liquid crystal cosmetic according to one aspect is formed.

Embodiments for Carrying Out the Invention

[0037] Hereinafter, the present invention will be described in more detail through examples. However, these examples are for illustrative purposes of the present invention, and the scope of the present invention is not limited to these examples.

[0038] [Examples] Examples 1 to 6: Production of a highly hard liquid crystal cosmetic composition with a feeling of elasticity Examples were prepared to confirm the optimal mixing weight ratio of the viscosity modifier for a composition of a high-hardness cosmetic having an appearance with a resilient feeling while having a more felt sense of moisture than existing liquid crystal cosmetic compositions, including a low-concentration oil.

[0039] Cosmetic compositions of Examples 1 to 6 were produced with the compositions and contents shown in Table 1 below (unit: wt%). A beaker containing the raw materials included in the aqueous phase was heated to 70 to 80 °C to dissolve the aqueous phase components, and mixed with a homomixer (product name: Mark II, manufacturer: PRIMIX Japan) until all components were uniformly dispersed. After the mixing of the aqueous phase was completed, a viscosity modifier was added and dispersed uniformly. Next, a beaker containing the raw materials included in the oil phase was heated and dissolved in the same manner as the aqueous phase, mixed, and then emulsified with a homomixer. Thereafter, a neutralizing agent was added to the emulsified emulsion to produce a high-hardness liquid crystal cosmetic composition.

[0040]

Table 1

[0041] [Experimental Examples] Experimental Example 1: Confirmation of the formation of liquid crystals in the cosmetic composition The formation of liquid crystals in the cosmetic compositions produced in Examples 1 to 6 was confirmed. As a result, it was found that the cosmetic composition of Example 1 formed stable liquid crystals in an obvious form as shown in Figure 1. In addition, stable liquid crystals were also formed in the cosmetic compositions of Examples 3 to 5. In the case of Example 2, the formation of liquid crystals was not clearly visible. In the case of Example 6, the viscosity formed by the addition of the viscosity modifier during production was high and stirring was not easy, and stable emulsions and liquid crystals were not formed.

[0042] Experimental Example 2: Evaluation of the hardness and usability of the cosmetic composition The hardness of the cosmetic compositions produced in Examples 1 to 6 was measured after storage at room temperature for a whole day. The hardness was measured using a Fudoh Rheometer RT-3005D manufactured by Rheotec Co., at an operating speed of 2 cm / min, up to a depth of 25 mm of the sample. The average value was derived after 5 measurements.

[0043]

Table 2

[0044] As a result, as shown in Table 2, it was found that as the cosmetic compositions of Example 1 and Examples 3 to 5, a cosmetic composition with high hardness with a feeling of elasticity was produced. Also, while having high hardness, it has an appropriate feeling of elasticity, and when applied to the skin, it has a unique stretch and moisture feeling as if kneaded in, has a fresh and light texture, is quickly absorbed, and is excellent in the overall usability. On the other hand, among the viscosity modifiers, in the case of Example 2 using only the (acrylates / alkyl acrylate (C 10 - 30 )) cross-polymer alone, the feeling of elasticity was felt to be insufficient compared to the cosmetic compositions of Example 1 and Examples 3 to 5, and when rolling like a general cream, it had a somewhat thick feeling, and it was found that it was crispy and not much moisture feeling was felt. Also, in the case of Example 6 using only carbomer which has no emulsifying power but has a large thickening power among the viscosity modifiers, the viscosity of the emulsion greatly increased at the time of charging, stirring was not easy, a stable emulsion was not formed, and the hardness was too high to be applied to the skin.

[0045] Experimental Example 3: Evaluation of the stability of the cosmetic composition The stability of the cosmetic compositions produced in Examples 1 to 6 was evaluated. While storing at room temperature and high temperature conditions of 45°C for 5 days, 10 days, 15 days and one month, the dosage form stability was observed according to the occurrence of hardness decrease, oil floating or separation, etc., and the results are shown in Table 3 below.

[0046]

Table 3

[0047] As can be seen from Table 3, in the case of Example 2, a decrease in hardness was confirmed when stored at high temperature for one month, and in the case of Example 6, separation phenomena such as oil floating were confirmed at normal temperature and high temperature, and the dosage form stability was not good. On the other hand, in the case of Example 1 and Examples 3 to 5, it was found that the dosage form stability was stably maintained regardless of the storage temperature and period.

[0048] Through the above experimental results, it was found that the composition of the liquid crystal cosmetic according to one aspect can ensure excellent usability and high stability while forming a composition of a liquid crystal cosmetic with high hardness and elasticity through the selective mixed use of a viscosity modifier.

Claims

1. A composition of a liquid crystal cosmetic comprising 5 to 10 parts by weight of a liquid crystal forming agent and 0.05 to 1 part by weight of a viscosity modifier with respect to 100 parts by weight of the total composition, wherein the viscosity modifier comprises a combination of an acrylates / alkyl acrylate (C10-30)) cross-polymer and a carbomer.

2. The liquid crystal-forming agent is C １２ - １６ alcohol, C １４ - ２２ alcohol, cetearyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, cetearyl glucoside, cetearyl olive oil fatty acid, sorbitan olive oil fatty acid, sorbitan palmitate, sucrose polystearate, C １２ - ２０ alkyl glucoside, polyglyceryl-3 methylglucose distearate, hydrogenated lecithin, dicaprylyl carbonate, ethylhexyl palmitate, neopentyl glycol dicaprylate, cetyl ethylhexanoate, dicaprylyl ether, pentaerythrityl tetraethylhexanoate, pentaerythrityl tetraisostearate, (caprylic acid / capric acid) coconut alkyl, tri(caprylic acid / capric acid) glyceryl, and ethylhexyl stearate, and is two or more selected from the group consisting of. The composition of the liquid crystal cosmetic according to claim 1, characterized in that.

3. The composition has a hardness of 80 to 150 dynes / cm ２ The composition of the liquid crystal cosmetic according to claim 1, characterized in that it is as described above.

4. The composition of the liquid crystal cosmetic according to claim 1, characterized in that the composition is a water cream.

5. A method for producing a composition of a liquid crystal cosmetic, comprising the step of adding a viscosity modifier to an aqueous phase portion, and the step of mixing a liquid crystal forming agent with the aqueous phase portion to which the viscosity modifier has been added, wherein the viscosity modifier comprises a combination of an acrylates / alkyl acrylate (C10-30)) cross-polymer and a carbomer.

6. The liquid crystal forming agent is C １２ - １６ -alcohol, C １４ - ２２ -alcohol, cetearyl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, cetearyl glucoside, cetearyl olive oil fatty acid, sorbitan olive oil fatty acid, sorbitan palmitate, sucrose polystearate, C １２ - ２０ -alkyl glucoside, polyglyceryl-3 methylglucose distearate, hydrogenated lecithin, dicaprylyl carbonate, ethylhexyl palmitate, neopentyl glycol dicaprylate, cetyl ethylhexanoate, dicaprylyl ether, pentaerythrityl tetraethylhexanoate, pentaerythrityl tetraisostearate, (caprylic acid / capric acid) coconut alkyl, tri(caprylic acid / capric acid) glyceryl, and ethylhexyl stearate, and the method for producing the composition of the liquid crystal cosmetic according to claim 5, characterized in that it is two or more selected from the group consisting of.

7. The method for producing a composition of a liquid crystal cosmetic according to claim 5, characterized in that the liquid crystal forming agent is contained in an amount of 5 to 10 parts by weight with respect to 100 parts by weight of the total composition, and the viscosity modifier is contained in an amount of 0.05 to 1 part by weight with respect to 100 parts by weight of the total composition.

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