Oily gel fragrance composition for cosmetics

Abstract

To provide an oily gel fragrance composition for cosmetics that is readily preparable, has transparency, exhibits high fragrance persistence, and has favorable usability and gel stability over time.SOLUTION: The present invention provides an oily gel fragrance composition for cosmetics having a transparent appearance, which contains the following components (A) to (C): (A) 1 to 20 wt.% of a fragrance, relative to the total amount of the composition; (B) 5 to 15 wt.% of fumed hydrophobic silica, relative to the total amount of the composition; and (C) 80 wt.% or more of a liquid ester oil having two or more ester bonds and one or less hydroxyl groups in each molecule, relative to the total amount of liquid oily components excluding component (A).SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to an oily gel fragrance composition for cosmetics that is easy to prepare, transparent, has high fragrance persistence, and has good usability and gel stability over time.

Background Art

[0002] Conventionally, as fragrance compositions applied to the body, liquid compositions such as perfumes and eau de toilettes in which fragrance components are mixed with alcohols such as ethanol and water have been mainstream, and atomizer-type containers have been widely used. Such alcohol-based fragrance compositions in atomizer containers are difficult for people sensitive to alcohol to use, contain many volatile components, have low fragrance persistence, and are difficult to adjust in terms of portability, application amount, and application range.

[0003] In order to compensate for the drawbacks of alcohol-based fragrance compositions and increase the usage scenarios of fragrance compositions, it has been reported that the liquid system is thickened by reducing the alcohol content or appropriately blending polymers into the base (see Patent Documents 1 and 2). However, in systems using these polymers, stickiness derived from the polymers is likely to occur when the base is applied to the skin, and those that satisfy usability have not been obtained. Due to the influence of the fragrances, surfactants, or alcohols such as ethanol used, the viscosity of the gel decreases over time, and there are also problems in terms of stability over time. In addition, in order to suppress the content of alcohols such as ethanol to a small amount, a large amount of surfactant must be used. However, a high content of surfactant also causes stickiness when applied to the skin.

[0004] On the one hand, since the oil-based fragrance composition does not need to use alcohols such as ethanol that dissolve fragrance components, it is easy for people sensitive to alcohol to use. Also, since the composition remains on the skin without volatilizing, the fragrance components can gradually vaporize to sustain the fragrance for a long time. Furthermore, by gelling the liquid oil-based component, the usability and portability can be improved, and the usage scenarios can be increased.

[0005] Conventionally, as oil-based gelling agents used in gel-like oil-based cosmetics, there are solid oil agents such as waxes (see Patent Document 3), dextrin fatty acid esters (see Patent Document 4), bis(acylamino)cyclohexane derivatives (see Patent Document 5), and the like. However, when a solid oil agent such as wax is used as a gelling agent, there is a problem that the gelled composition becomes cloudy and the appearance is impaired. Also, when using dextrin fatty acid esters or bis(acylamino)cyclohexane derivatives, heating and dissolution at high temperatures are required during production, resulting in poor workability. Moreover, since the fragrance must be added at high temperatures, it may affect the fragrance tone.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Summary of the Invention

Problems to be Solved by the Invention

[0007] The problem in the present invention is to provide an oily gel fragrance composition for cosmetics that is easy to prepare, transparent, has high fragrance persistence, and has good usability and gel stability over time.

Means for Solving the Problem

[0008] In view of the above circumstances, as a result of intensive research by the inventors of the present application, by combining a fragrance, fumed hydrophobic silica, and a liquid ester oil having two or more ester bonds and one or less hydroxy groups in one molecule, an oily gel fragrance composition for cosmetics that is easy to prepare, transparent, has high fragrance persistence, and has good usability and gel stability over time can be obtained, and the present invention has been completed.

[0009] That is, the present invention is an oily gel fragrance composition for cosmetics containing the following components (A) to (C) and having a transparent appearance. (A) 1 to 20% by weight of a fragrance based on the total amount of the composition (B) 5 to 15% by weight of fumed hydrophobic silica based on the total amount of the composition (C) A liquid ester oil having two or more ester bonds and one or less hydroxy groups in one molecule, 80% by weight or more based on the total amount of the liquid oily components (excluding component (A))

Effect of the Invention

[0010] The present invention is to provide an oily gel fragrance composition for cosmetics that is easy to prepare, transparent, has high fragrance persistence, and has good usability and gel stability over time.

Best Mode for Carrying Out the Invention

[0011] Component (A) used in the present invention is not particularly limited as long as it is a fragrance usually used in cosmetics, and examples include natural fragrances, synthetic fragrances, or compounded fragrances combining these. The content is 1 to 20% by weight based on the total amount of the composition, preferably 3 to 15% by weight. If it is less than 1% by weight, a composition with high fragrance persistence cannot be obtained, and if the content exceeds 20% by weight, the gel stability over time and usability may deteriorate.

[0012] Component (B) used in the present invention is fumed hydrophobic silica. Fumed hydrophobic silica is fine silica with an average particle diameter of about 5 to 50 nm, and its surface is hydrophobically treated with a treating agent such as dimethyldichlorosilane, hexamethyldisilazane, or dimethylpolysiloxane. Examples of commercially available products include AEROSIL R972, AEROSIL R974, AEROSIL R976, AEROSIL RX200, AEROSIL RX300, AEROSIL R812, AEROSIL R812S (manufactured by Nippon Aerosil Co., Ltd.), etc. One or more of these can be used as necessary.

[0013] The M value is used as an index representing the degree of hydrophobicity of fumed hydrophobic silica. Fumed hydrophobic silica is put into several water / methanol mixed solutions with different concentrations, and the value of the methanol concentration at which all the fumed hydrophobic silica begins to settle is taken as the M value. The higher the M value, the higher the degree of hydrophobicity. The preferred range of the M value of the fumed hydrophobic silica used in the present invention is 60 or less.

[0014] Method for Measuring the M Value Prepare a water / methanol mixed solution with the methanol concentration changed at 5% by volume intervals, and put 5 ml of this into a test tube with an inner diameter of 15 mm (outer diameter of 18 mm) and a length of about 12.5 cm. Then add 0.1 g of the powder to be measured, shake and mix, let it stand, and observe. The value of the minimum methanol concentration at which all the powder becomes wet and is uniformly dispersed is taken as the M value.

[0015] The content of component (B) is 5 to 15% by weight, preferably 7 to 11% by weight, based on the total amount of the composition. If the content is less than 5% by weight, the gelation of the oily component is not sufficient, and bleeding of the oily component is likely to occur. On the other hand, if it is 15% by weight or more, it is difficult to disperse, the workability is poor, and the transparency, gel stability over time, and usability may deteriorate.

[0016] Component (C) used in the present invention is a liquid ester oil having two or more ester bonds and one or less hydroxy groups in one molecule. The liquid ester oil is an ester oil having fluidity at 20°C.

[0017] Examples of the ester oil having two or more ester bonds and one or less hydroxy groups in one molecule of component (C) include esters of polyvalent carboxylic acids and alcohols, esters of carboxylic acids and polyvalent alcohols, esters of carboxylic acids and polyethylene glycol or polyglycerin, etc. Further examples include esters having a glycerin skeleton, a polyglycerin skeleton, a trimethylolpropane skeleton, a propanediol skeleton, a pentaerythritol skeleton, a neopentyl glycol skeleton, etc. Specifically, diglyceryl tetraisostearate, diglyceryl tetraisooctanoate, diglyceryl tristearate, diglyceryl isostearate, glyceryl triisostearate, glyceryl triisooctanoate, glyceryl tri(caprylic / capric acid), glyceryl triethylhexanoate, trimethylolpropane triisostearate, trimethylolpropane triisooctanoate, trimethylolpropane triethylhexanoate, propanediol diisostearate, propanediol di(caprylic / capric acid), pentaerythritol tetraisostearate, pentaerythritol tetraisooctanoate, pentaerythritol tetraethylhexanoate, dipentaerythritol hexaisostearate, neopentyl glycol dioctanoate, neopentyl glycol diethylhexanoate, diisostearyl malate, diethylhexyl succinate, etc.

[0018] The content of component (C) is 80% by weight or more based on the total amount of the liquid oily components (excluding component (A)). When it is less than 80% by weight, bleeding of the oily components is likely to occur, and the gel stability over time may deteriorate.

[0019] In addition to the above essential components, the oil-based gel fragrance composition for cosmetics of the present invention can be blended with any components usually used in ordinary cosmetics, pharmaceuticals, quasi-drugs, etc., as long as the intended effects are not impaired. For example, humectants, thickeners, ultraviolet absorbers, ultraviolet scattering agents, preservatives, chelating agents, antioxidants, colorants, glitter, etc. may be mentioned. However, it is not limited to these examples.

Examples

[0020] Next, the present invention will be described in more detail with reference to examples. However, the present invention is not limited thereto. The content is in weight%.

[0021] Manufacturing method Component (B) was dispersed in component (C) (or component (C) + optional components if there are any) using a homomixer. Then, defoaming was performed, and component (A) was added and mixed uniformly to obtain an oil-based gel fragrance composition for cosmetics.

[0022] Transparency evaluation A cylindrical transparent glass bottle with a diameter of 2.5 cm was filled with the sample. A piece of paper printed with a plurality of black horizontal lines with a line width of 2 mm and an interval of 7 mm was placed on the back of the sample, and the state of the horizontal lines was confirmed from the front. The transparency was judged according to the following criteria. (Judgment criteria) (Judgment): (Evaluation) ◎: Can be clearly confirmed 〇: Slightly turbid but can be confirmed △: Somewhat turbid and the horizontal lines are difficult to confirm ×: Cannot be confirmed ―: No evaluation (does not gel)

[0023] Gel stability evaluation over time Regarding the evaluation of the gel stability over time, each sample was left standing in a storage chamber with a temperature change from -5 to 40 °C (temperature change rate: 45 °C / 6 hours), and the appearance state after 2 months was visually confirmed. The gel stability over time was judged according to the following criteria. (Judgment criteria) (Judgment): (Evaluation) ◎: No seeps of oily components, and no differences are observed from the initial gel state. ○: There is a slight seepage of oily components, but no differences are observed from the initial gel state. △: There is a lot of seepage of oily components, and differences are observed from the initial gel state. ×: The gel has collapsed. ―: No evaluation (does not gel).

[0024] Evaluation of fragrance persistence A total of 10 people, including 2 fragrance experts and 8 general panelists, applied each sample to their forearms and evaluated the fragrance after 6 hours. The average score of each panelist was calculated as the evaluation value, and the fragrance persistence was judged according to the following criteria. (Evaluation criteria) (Score): (Evaluation) 4: The fragrance persistence is very good. 3: The fragrance persistence is good. 2: The fragrance persistence is slightly poor. 1: The fragrance persistence is poor. (Judgment criteria) (Judgment): (Evaluation value) ◎: 3.5 points or more ○: 3 points or more and less than 3.5 points △: 2 points or more and less than 3 points ×: Less than 2 points

[0025] Evaluation of usability Ten professional panelists used each sample and evaluated the usability from the perspectives of "ease of application" during application and "non-stickiness" after application. The average score of each panelist was calculated as the evaluation value, and the usability was judged according to the following criteria. (Evaluation criteria) (Score): (Evaluation) 4: The usability is very good. 3: The usability is good. 2: The usability is slightly poor. 1: The usability is poor. (Judgment criteria) (Judgment): (Evaluation value) ◎: 3.5 points or more ○: 3 points or more and less than 3.5 points △: Two or more but less than three points ×: Less than two points

[0026]

Table 1

[0027] As shown in Examples 1 to 4 of Table 1, when the content of the fragrance satisfied 1 to 20% by weight with respect to the total amount of the composition, it was revealed that all the evaluated items were good. On the other hand, as shown in Comparative Examples 1 and 2, when the content of the fragrance was less than 1% by weight with respect to the total amount of the composition, the persistence of the scent was poor. When it was more than 20% by weight, both the gel stability over time and usability were poor.

[0028]

Table 2

[0029] As shown in Examples 5 to 12 of Table 2, when fumed hydrophobized silica was used and the content of the fumed hydrophobized silica satisfied 5 to 15% by weight with respect to the total amount of the composition, it was revealed that all the evaluated items were good. On the other hand, as shown in Comparative Examples 3 and 4, when non-fumed hydrophobized silica was used, the liquid oily component could not be gelled, and when unfumed untreated fumed silica was used, both the transparency and the gel stability over time were poor. Also, as shown in Comparative Examples 5 and 6, when the content of the fumed hydrophobized silica was less than 5% by weight with respect to the total amount of the composition, the liquid oily component could not be sufficiently gelled, and when it was more than 15% by weight, all of the transparency, the gel stability over time, and the usability were poor.

[0030]

Table 3

[0031] As shown in Examples 13 to 20 of Table 3, when using a liquid ester oil having two or more ester bonds and one or less hydroxy groups in one molecule, and the content of the liquid ester oil satisfies 80% by weight or more with respect to the total amount of the liquid oily components (excluding component (A)), it was revealed that all evaluated items were good. On the other hand, in Comparative Example 7 using a liquid ester oil having less than two ester bonds in one molecule, all of transparency, gel stability over time, and usability were poor. In Comparative Example 8 using a liquid ester oil having more than one hydroxy group in one molecule, stickiness occurred and usability was poor. In Comparative Example 9 where the content of the liquid ester oil was less than 80% by weight with respect to the total amount of the liquid oily components (excluding component (A)), bleeding of the oily components was much and gel stability over time was poor.

[0032] In Tables 1 to 3, the following products were used for the components marked with ※.

[0033] ※1: AEROSIL R974 (manufactured by Nippon Aerosil Co., Ltd.) ※2: AEROSIL R976 (manufactured by Nippon Aerosil Co., Ltd.) ※3: AEROSIL R812 (manufactured by Nippon Aerosil Co., Ltd.) ※4: AEROSIL R812S (manufactured by Nippon Aerosil Co., Ltd.) ※5: AEROSIL RX200 (manufactured by Nippon Aerosil Co., Ltd.) ※6: SA - SB - 300 (7%) (manufactured by Miyoshi Kasei Co., Ltd.) ※7: AEROSIL 200 (manufactured by Nippon Aerosil Co., Ltd.) ※8: CRODAMOL OSU - LQ - (JP) (manufactured by Croda Japan Co., Ltd.) ※9: O.D.O (manufactured by Nisshin Oillio Group, Ltd.) ※10: NIKKOL Trifat S - 308 (manufactured by Nippon Surfactant Industry Co., Ltd.) ※11: NIKKOL Pentalan - 408 (manufactured by Nippon Surfactant Industry Co., Ltd.) ※12: Cosmol 44V (manufactured by Nisshin Oillio Group, Ltd.) ※13: Resolex PGIS23 (manufactured by Koso Alcohol Industry Co., Ltd.) ※14: Saracos 99 (manufactured by Nisshin Oillio Group, Ltd.) ※15: Cosmoll 42V (manufactured by Nisshin Oillio Group, Ltd.) ※16: CARNATION (manufactured by SONNEBORN, INC.)

[0034] Examples of the present invention are shown below.

[0035] Example 21 Oil Gel Fragrance 1 (Components) (wt%) 1. Diethylhexyl Succinate ※8 5.00 2. Triethylhexanoin ※10 60.00 3. Pentaerythrityl Tetraethylhexanoate ※11 17.00 4. Mineral Oil ※16 5.00 5. Fumed Hydrophobic Silica (M value = 45) ※2 8.00 6. Fragrance (fruity floral type) 5.00

[0036] (Preparation Method) Component 5 was dispersed in Components 1 to 4 using a homomixer. Then, it was defoamed and Component 6 was added and mixed uniformly to obtain an oily gel-like fragrance composition for cosmetics.

[0037] Example 22 Oil Gel Fragrance 2 (Components) (wt%) 1. Diethylhexyl Succinate ※8 7.00 2. Glyceryl Tri(caprylate / caprate) ※9 60.00 3. Polyglyceryl-2 Triisostearate ※13 15.00 4. Mineral Oil ※16 5.00 5. Fumed Hydrophobic Silica (M value = 45) ※2 3.00 6. Fumed Hydrophobic Silica (M value = 50) ※3 4.00 7. Fragrance (Green Fruity Type) 6.00

[0038] (Preparation Method) Disperse Components 5 and 6 in Components 1 to 4 using a homomixer. Then, defoam and add Component 7 and mix uniformly to obtain an oily gel-like fragrance composition for cosmetics.

[0039] In Examples 21 and 22 above, an oily gel-like fragrance composition for cosmetics with excellent transparency, fragrance persistence, usability, and gel stability over time could be obtained.

Claims

Claim 1 An oily gel fragrance composition for cosmetics, which contains the following components (A) to (C) and has a transparent appearance. (A) 1 to 20% by weight of perfume based on the total amount of the composition (B) 5 to 15% by weight of fumed hydrophobic silica based on the total amount of the composition (C) A liquid ester oil having two or more ester bonds and one or less hydroxy group in one molecule, and 80% by weight or more based on the total amount of liquid oily components (excluding component (A)). Claim 2 The oily gel fragrance composition for cosmetics according to claim 1, wherein the M value of the component (B) is 60 or less.

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