Two-phase composition comprising diphenyl polydimethylsiloxane and abietate oil

Abstract

The present invention relates to a two-phase composition comprising diphenyl polydimethylsiloxane and a abietate oil. In the present invention, by using an arylated silicone having a specific gravity of 1.0 or more and a abietic acid ester oil, dispersion-association of the oil can be stably reproduced at an appropriate speed in a two-phase dosage form in which the oil settles in an aqueous phase.

Description

Technical Field

[0001] This invention relates to a two-phase composition comprising diphenyl polydimethylsiloxane and rosinate oil. Background Technology

[0002] As clean beauty becomes a trend, there is a growing demand for formulations with minimal ingredients and fewer concerns about irritation. Consumers pay attention to the overall ingredients of cosmetics before making a purchase decision and are persuaded by phrases such as "uses gentle ingredients." Correspondingly, cosmetic marketing no longer only emphasizes effects but also pursues cleansing properties, such as being harmless, low-irritant or non-irritating, free of harmful ingredients, and containing naturally derived ingredients.

[0003] Emulsifiers, a type of surfactant, are essential ingredients added to stabilize water-oil mixtures, such as cosmetics. Surfactants have a molecular structure consisting of hydrophilic and lipophilic groups, thus enabling them to mix with water and oil. These emulsifiers are widely used not only in cosmetics but also in food, pharmaceuticals, and daily necessities.

[0004] Emulsifiers can be classified by structure into PEG (polyethylene glycol) and silicone types, and by origin into natural and synthetic types. During the synthesis of PEG emulsifiers, carcinogenic substances such as 1,4-dioxane and ethylene oxide may remain alongside the emulsifier, leading to increasing concerns about the safety of using PEG emulsifiers. In addition to concerns about harmful residues, the trend towards using only the minimum necessary ingredients for skin care necessitates reducing the amount of emulsifier in formulations.

[0005] On the other hand, bilayer formulations have a distinctive appearance; that is, they form layers by allowing an oil layer to float on a non-viscosity aqueous layer, resulting in oil droplets when mixed for use. This type of bilayer formulation provides both oil and moisture to the skin without the presence of surfactants with high concerns about their harmfulness. Furthermore, since there is no need to stabilize the emulsion, it also eliminates the need for polymers used in this process, thus offering the advantage of a lighter, more refreshing feel.

[0006] However, in the case of two-phase formulations, since the density of the oil contained in the oil layer is lower than that of the aqueous layer, the formulations with the oil layer located above the aqueous layer are the main ones. In terms of user experience, these formulations mostly provide a sense of moisture rather than the nutritional feel of oil.

[0007] Therefore, in order to move beyond the traditional framework of existing bilayer formulations where the oil layer is located above the aqueous layer, there is increasing interest in developing cosmetic compositions that can place the oil layer at the lower end of the aqueous layer. Summary of the Invention

[0008] The problem to be solved

[0009] This invention relates to a two-phase cosmetic composition, providing a two-phase composition comprising an arylated silicone ester oil having a specific gravity of 1.0 or higher and a rosinate oil. Thus, a method is provided to stably and at an appropriate rate reproduce the dispersion-association of oil in a two-phase formulation in which the oil phase is settled in the aqueous phase.

[0010] Solution to the problem

[0011] This invention provides a two-phase cosmetic composition comprising: The oil phase comprises arylated silicones with a specific gravity of 1.0 or greater and rosin ester oils; and Aqueous phase, It has two phases, an aqueous phase and an oil phase, when left to stand, and an emulsion phase when shaken or stirred.

[0012] Invention Effects

[0013] In this invention, a two-phase cosmetic composition is provided that, by appropriately adjusting the specific gravity difference between the aqueous and oil phases, has a shape in which the oil settles in the aqueous phase when left to stand, and exhibits excellent shape retention even after repeated dispersion-association.

[0014] Furthermore, by combining arylated silicones with a specific gravity of 1.0 or higher with rosinate oils, the dispersion-association of oils can be reproduced at an appropriate rate and stably in two-phase cosmetic compositions.

[0015] In addition, by optimizing the components and their content in the composition, excellent stability and apparent suspension can be achieved.

[0016] In addition, two-phase cosmetic compositions can attract consumers' attention by having a special appearance in which oil settles in the aqueous phase, and consumers can feel a high level of nutrition by using the oil phase, which has a higher density than the aqueous phase. Attached Figure Description

[0017] Figure 1a as well as Figure 1b An image of the composition prepared in Experimental Example 1 according to the electrolyte content is shown.

[0018] Figure 2 Images of compositions prepared in Experimental Example 2 according to the type of surfactant are shown.

[0019] Figures 3a to 3b , Figure 4 as well as Figure 5An image is shown of the composition prepared in Experimental Example 3 according to the content ratio of arylated silicone and rosinate oil. Detailed Implementation

[0020] This invention relates to a two-phase cosmetic composition comprising: The oil phase comprises arylated silicones with a specific gravity of 1.0 or greater and rosin ester oils; and Aqueous phase, It has two phases, an aqueous phase and an oil phase, when left to stand, and an emulsion phase when shaken or stirred.

[0021] The two-phase cosmetic composition of the present invention will now be described in more detail.

[0022] In this invention, although the numerical value is limited to above, below, or more than or less than, unless otherwise specified, it means above or below.

[0023] In this invention, a two-phase cosmetic composition refers to a composition comprising two phases, an aqueous phase and an oil phase, or an oil phase and an emulsion phase, which are visually and / or macroscopically separated when left to stand, or a composition consisting of these.

[0024] At this point, the aqueous phase refers to a phase consisting of hydrophilic, water-soluble, or water-dispersible substances or a liquid phase composed of these at room temperature, and the oil phase refers to a phase consisting of lipophilic, oil-soluble, or oil-dispersible substances or a liquid phase composed of these at room temperature.

[0025] In one specific example, the two-phase cosmetic composition of the present invention may have two phases, an aqueous phase and an oil phase, when left to stand, with the oil phase settling in the aqueous phase. "The shape with the oil phase settling in the aqueous phase" can refer to a separate two-layer structure where the oil phase layer is located below the aqueous phase layer, or it can refer to a structure where a spherical oil phase is settling below the aqueous phase. In this case, "spherical" does not refer to the shape of a mathematically perfect sphere, but may also include cases where the projected image presents a shape that is the same as or similar to a circle or ellipse. There may be more than one spherical oil phase present below the aqueous phase, preferably one.

[0026] In one specific example, the two-phase cosmetic composition can achieve an emulsified phase upon shaking or stirring. Specifically, when the two-phase cosmetic composition is shaken or stirred, the oil phase can disperse into multiple small oil droplets. Moreover, after a certain period of time, it can recombine into the original large spherical oil phase droplets.

[0027] In this invention, the rate at which the oil phase dispersed into multiple droplets transforms into the original large oil phase droplets can be described as the merging rate. The merging rate of the two-phase cosmetic composition of this invention can be less than 60 minutes, less than 30 minutes, less than 20 minutes, or less than 10 minutes.

[0028] The two-phase cosmetic composition of the present invention may be surfactant-free, or the surfactant content may be less than 0.03% by weight, 0.01% by weight, 0.001% by weight, or 0.0001% by weight relative to 100% of the total composition. This allows for faster blending and improved cleansing performance. Furthermore, the absence of polymer components for emulsification stability results in a refreshing feel.

[0029] The two-phase cosmetic composition of the present invention comprises an oil phase and an aqueous phase.

[0030] In one specific example, the aqueous phase and the oil phase have a specific gravity difference, with the oil phase having a higher specific gravity than the aqueous phase. This allows for the appearance of the oil phase (oil) settling in the aqueous phase, attracting consumer attention and creating a sense of high nutritional value. Furthermore, a greater specific gravity difference between the aqueous and oil phases facilitates repeated dispersion-association of the dosage form. When a solute is added to the aqueous phase of a cosmetic composition, since most of the solute contributes to increasing the specific gravity, it is necessary to appropriately adjust the acceptable content of each component (or combination) contained in the aqueous phase. The specific gravity difference between the aqueous and oil phases can be, for example, 0.001 to 0.50, 0.002 to 0.40, 0.005 to 0.30, or 0.01 to 0.20.

[0031] In this invention, the oil phase may contain arylated silicones with a specific gravity of 1.0 or higher and rosin ester oils.

[0032] In one specific example, the oil phase may be 5 to 25% by weight, 5 to 20% by weight, 5 to 14% by weight, or 10 to 20% by weight relative to 100% of the total composition. A two-phase dosage form can be achieved within the above content range.

[0033] In this invention, the arylated silicone can have a high specific gravity of 1.0 or higher, thereby enabling the realization of a two-phase dosage form, specifically a form in which the oil phase (oil) settles in the aqueous phase. When the specific gravity is less than 1.0, it is difficult to achieve the morphology of a two-phase dosage form.

[0034] In one specific example, the aryl silicone may be selected from one or more of the group consisting of diphenyldimethicone, phenyl methicone, phenyltrimethicone, diphenylsiloxyphenyltrimethicone, tetramethyl tetraphenyl trisiloxane, triphenyl trimethicone, tetramethyltetraphenyl trisiloxane, and trimethyl pentaphenyltrisiloxane, and specifically, diphenyldimethicone may be used.

[0035] In one specific example, the content of aryl silicone relative to 100% by weight of the composition can be 3 to 20% by weight, 5 to 15% by weight, or 5 to 10% by weight. Within the above content range, it can have the effect of forming the oil phase into spherical shapes and causing it to settle.

[0036] In one specific example, the content of aryl silicone can be more than 10%, 20%, or 50% by weight of the oil phase, and the upper limit can be less than 100%, 99%, or 90% by weight.

[0037] In this invention, rosinate oils can promote the association of the oil phase in a two-phase formulation, thereby enhancing the coagulation of the oil. That is, rosinate oils have strong coagulation properties, so by using the above-mentioned rosinate oils, it is possible to achieve a large spherical oil phase.

[0038] In one specific example, the rosinate oil may use one or more of the following groups: methyl rosinate, ethylene glycol rosinate, dimeric pentaerythritol hexahydroxystearate / hexastearate / hexahydrogenated rosinate, glyceryl dibenzyl ester / hydrogenated rosinate, glyceryl dimyristate / hydrogenated rosinate, triethylene glycol hydrogenated rosinate, triethylene glycol rosinate, diethylene glycol rosinate, methyl rosinate, pentaerythritol hydrogenated rosinate, pentaerythritol rosinate, dimeric linoleyl alcohol hydrogenated rosinate, glyceryl hydrogenated rosinate, glyceryl tri-hydrogenated rosinate, glyceryl rosinate, and glyceryl diisostearate / hydrogenated rosinate. Specifically, methyl rosinate may be used.

[0039] In one specific example, the content of rosinate oil relative to 100% by weight of the composition may be 0.1 to 10% by weight, 0.5 to 10% by weight, or 1 to 5% by weight. The higher the oil content, the stronger the stickiness. Therefore, when the aforementioned range is exceeded, excessive stickiness may cause the spherical shape to collapse, and there is a concern that oil dispersion may not occur at all.

[0040] In addition, the content of rosin ester oil can be less than 90% by weight, 80% by weight or less than 50% by weight of the oil phase, and the lower limit can be more than 0% by weight, more than 1% by weight or more than 10% by weight.

[0041] In one specific example, in addition to the aforementioned components, the oil phase may use, without restriction, any of the components used in the oil phase of the cosmetic composition, without altering the shape of the two-phase dosage form.

[0042] In this invention, the aqueous phase may contain purified water.

[0043] In one specific example, the aqueous phase may be 75 to 95% by weight, 80 to 95% by weight, 84 to 95% by weight, or 80 to 90% by weight relative to 100% by weight of the total composition.

[0044] In this invention, the aqueous phase may further contain an electrolyte. The electrolyte may be an ion-binding compound, which can be a water-soluble salt formed by the combination of cations and anions involved in salt formation. This electrolyte can promote the salting-out of oil, thereby enabling oil merging to occur in a short time.

[0045] The principle behind the salting-out phenomenon is that when an electrolyte with a high charge density dissolves in the aqueous phase, an electrostatic repulsion force is generated between the charges. At the same time, due to the increase in the hydrophobic effect, the coagulation between oil droplets is promoted, thereby enabling the dispersed oil to merge in a short period of time.

[0046] In one specific example, the electrolyte may be one or more selected from the group consisting of sodium chloride (NaCl), sodium sulfate (Na2SO4), sodium carbonate (Na2CO3), potassium chloride (KCl), potassium sulfate (K2SO4), potassium carbonate (K2CO3), magnesium chloride (MgCl2), calcium chloride (CaCl2), calcium carbonate (CaCO3), and magnesium sulfate (MgSO4).

[0047] In one specific example, the electrolyte content relative to 100% by weight of the composition can be less than 3% by weight, 0.01 to 2.5% by weight, 0.02 to 2% by weight, 0.05 to 1.5% by weight, or 0.1 to 1% by weight. When an excessive amount of electrolyte is used, there is a concern that the specific gravity difference may reverse, causing the oil phase to float upwards.

[0048] In this invention, the aqueous phase may further comprise a polyol. The polyol contains hydroxyl groups within its structure; through the binding force of these hydroxyl groups on water, separation from oil can be achieved more quickly.

[0049] In a specific example, the polyol can be a substance with two or more -OH groups bonded in its molecular structure. For example, it can be one or more selected from the group consisting of glycerol, dipropylene glycol, 1,3-butanediol, 2,3-butanediol, pentanediol, 1,2-hexanediol, octyl ethylene glycol, propylene glycol, and 1,2-propanediol. Specifically, pentanediol can be used.

[0050] In one specific example, the content of the polyol relative to 100% by weight of the total composition may be 0.1 to 10% by weight, 0.1 to 5% by weight, or 0.5 to 5% by weight. The aforementioned polyol may be included within the aforementioned range, taking into account the effect of opacity and the effect of increase or decrease in specific gravity, depending on the characteristics of the polyol.

[0051] In addition to the aforementioned components, the two-phase cosmetic composition of the present invention may further include, without reducing the effectiveness of the present invention, any one or more of the following components selected from the group consisting of oil components, moisturizers, polymeric raw materials, sugars, antioxidants, buffers, various extracts, preservatives, pigments, or fragrances commonly incorporated into cosmetics.

[0052] Implementation

[0053] The present invention will now be described in detail through embodiments. These embodiments are merely illustrative and the scope of the invention is not limited to them. These embodiments are provided to fully disclose the invention and to completely inform those skilled in the art of the scope of the invention, and the invention is defined only by the scope of the claims.

[0054] Example

[0055] Experimental Example 1. Setting the electrolyte content

[0056] The content of electrolytes that promotes merging without reversing the specific gravity values ​​between the oil and water phases was selected.

[0057] A composition containing an electrolyte (MgSO4) was manufactured according to the composition and content specified in Table 1 below.

[0058] The manufacturing method is as follows.

[0059] 1. Dissolve 'A' completely at room temperature.

[0060] 2. Add 'B' to the 'A' dissolved in 1.

[0061] [Table 1]

[0062] The results are confirmed as follows.

[0063] 1. First, put the composition into a vial, and then shake it simultaneously with similar force and number of times.

[0064] 2. Next, place the small bottle on a flat surface and measure the time required for merging (oil merging speed).

[0065] The appearance status after 30 minutes following execution 1 is classified as follows.

[0066] ◎: Merge into a large sphere

[0067] O: Distributed with a large spherical oil and several small spherical oils

[0068] X: Not merged

[0069] In addition, the oil merging speed is classified as follows.

[0070] ◎: Merge completed within 10 minutes

[0071] ○: Merge completed within 30 minutes

[0072] X: No merger after 8 hours

[0073] The measurement results are shown in Figure 1a , Figure 1b And Table 2.

[0074] [Table 2]

[0075] Figure 1a The images show the cases where oil settles in a dispersed state (left, manufacturing example 1-1) and the cases where it merges (right, manufacturing example 1-4). Figure 1b The examples show cases where salt concentration did not cause a reversal of the specific gravity value (left, manufacturing examples 1-4) and cases where it did cause a reversal of the specific gravity value (right, manufacturing examples 1-6). At this time, in... Figure 1b In the case of colorants, although the composition contains colorants, the colorants do not affect the combination.

[0076] like Figure 1a , Figure 1b As shown in Table 2, it can be confirmed that in the absence of electrolyte (MgSO4) (Manufacturing Example 1-1), the oil phase cannot maintain a spherical shape, and the oil settles in a dispersed state without coalescence. However, in the case of an excess of electrolyte concentration of 3% or more (Manufacturing Example 1-6), the specific gravity difference is reversed, causing the oil phase to float upward and hindering its settling.

[0077] In Experiment 1, oil settles due to its high specific gravity. Therefore, the electrolyte concentration was selected to be around 1%. At this electrolyte concentration, even if salt is added to the aqueous phase, the specific gravity difference between the aqueous and oil phases can be stably maintained.

[0078] Experimental Example 2. Evaluation of the appearance caused by the use of surfactants

[0079] Compositions containing surfactants were manufactured according to the composition and content specified in Table 3 below.

[0080] [Table 3]

[0081] Figure 2 Images of compositions prepared in Experimental Example 2 according to the type of surfactant are shown.

[0082] like Figure 2 As shown, it can be confirmed that the composition underwent partial emulsification / solubilization, and the entire dosage form was suspended, failing to revert to spherical oil. That is, it can be confirmed that regardless of the type of surfactant, after shaking, the oil did not revert to a spherical shape, and both the aqueous and oil phases remained suspended.

[0083] Experimental Example 3. Preparation of a two-phase cosmetic composition

[0084] Experimental examples confirmed that when the oil phase containing aryl silicone also contains rosinate oil, the coalescence rate of the dispersed oil is improved.

[0085] Specifically, after the composition was manufactured according to the composition and content in Table 4 below, the appearance was evaluated according to the method of Experimental Example 1.

[0086] [Table 4]

[0087] Figures 3a to 3b , Figure 4 as well as Figure 5 An image is shown of the composition prepared in Experimental Example 3, based on the content ratio of arylated silicone and rosin ester oil. Specifically, Figure 3a The image shown is of the composition immediately after shaking. Figure 3bThe image shown is an image of the composition after 10 minutes of shaking. Figure 3c The image shown is an image taken 30 minutes after the composition was shaken.

[0088] As shown in Figure 3, it can be confirmed that Examples 1 to 3, which contain diphenyl polydimethylsiloxane and methyl rosinate in the oil phase, exhibit a faster coalescence rate in the dispersed oil phase compared to Comparative Example 1, which does not contain methyl rosinate.

[0089] in particular, Figure 4 The image shows the composition prepared in Example 2 after shaking for 30 minutes, confirming that rapid merging was achieved after dispersion.

[0090] in addition, Figure 5 The image shows the composition prepared in Comparative Example 2 immediately after shaking. It can be confirmed that when the content of hydrogenated methyl rosinate is 90% of the total weight of the oil phase, the viscosity of the oil phase is too high, causing the dispersion to fail properly. This is not aesthetically desirable, and therefore it can be confirmed that the rosinate oil should be included in a lower content.

[0091] Industrial applications

[0092] In this invention, a two-phase cosmetic composition is provided that, by appropriately adjusting the specific gravity difference between the aqueous and oil phases, has a shape in which the oil settles in the aqueous phase when left to stand, and exhibits excellent shape retention even after repeated dispersion-association.

Claims

1. A two-phase cosmetic composition comprising: The oil phase contains arylated silicones with a specific gravity of 1.0 or greater and rosin ester oils; as well as Aqueous phase, It has two phases, an aqueous phase and an oil phase, when left to stand, and an emulsion phase when shaken or stirred.

2. The two-phase cosmetic composition according to claim 1, wherein, It does not contain surfactants, or the content of the surfactants is less than 0.03% by weight relative to the total weight of the composition.

3. The two-phase cosmetic composition according to claim 1, wherein, The oil phase comprises 5 to 25% by weight relative to the total weight of the composition. The aqueous phase is 75 to 95% by weight relative to the total weight of the composition.

4. The two-phase cosmetic composition according to claim 1, wherein, The arylated silicone with a specific gravity of 1.0 or greater is selected from one or more of the group consisting of diphenyldimethicone, phenyl methicone, phenyltrimethicone, diphenylsiloxyphenyltrimethicone, tetramethyl tetraphenyl trisiloxane, triphenyl trimethicone, tetramethyltetraphenyl trisiloxane, and trimethyl pentaphenyltrisiloxane.

5. The two-phase cosmetic composition according to claim 1, wherein, The content of arylated silicone with a specific gravity of 1.0 or more is 3 to 20 by weight relative to the total weight of the composition.

6. The two-phase cosmetic composition according to claim 1, wherein, Rosinate oils are selected from one or more of the following groups: methyl rosinate, ethylene glycol rosinate, dimeric pentaerythritol hexahydroxystearate / hexastearate / hexahydrogenated rosinate, glyceryl dibenzyl ester / hydrogenated rosinate, glyceryl dimyristate / hydrogenated rosinate, triethylene glycol hydrogenated rosinate, triethylene glycol rosinate, diethylene glycol rosinate, methyl rosinate, pentaerythritol hydrogenated rosinate, pentaerythritol rosinate, dimeric linoleyl alcohol hydrogenated rosinate, glyceryl hydrogenated rosinate, glyceryl tri-hydrogenated rosinate, glyceryl rosinate, and glyceryl diisostearate / hydrogenated rosinate.

7. The two-phase cosmetic composition according to claim 1, wherein, The content of rosinate oil is 0.1 to 10% by weight relative to the total weight of the composition.

8. The two-phase cosmetic composition according to claim 1, wherein, It also includes one or more electrolytes selected from the group consisting of sodium chloride (NaCl), sodium sulfate (Na2SO4), sodium carbonate (Na2CO3), potassium chloride (KCl), potassium sulfate (K2SO4), potassium carbonate (K2CO3), magnesium chloride (MgCl2), calcium chloride (CaCl2), calcium carbonate (CaCO3), and magnesium sulfate (MgSO4). The content of the above electrolyte is less than 3% by weight relative to the total weight of the composition.

9. The two-phase cosmetic composition according to claim 1, wherein, It also contains polyols, The content of the above polyol is 0.1 to 10 by weight relative to the total weight of the composition.

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