Hair cosmetics

Abstract

This hair cosmetic contains a large amount of conditioning ingredients, yet is a clear liquid before use, making it easy to apply to the hair. When water is added during use, it becomes cloudy and thickens, creating a rich care feel while providing the hair with a moist and smooth texture, and also exhibiting excellent stability over time at low temperatures. [Solution] The hair cosmetic composition contains (a) 1 to 7% by mass of a single-chain cationic surfactant, (b) 5 to 45% by mass of a linear higher alcohol having 12 and / or 14 carbon atoms, (c) 10 to 80% by mass of propylene glycol and / or dipropylene glycol, (d) 0 to 70% by mass of ethanol, and (e) 0 to 10% by mass of water, wherein the mass ratio of the amount of component (b) to the total amount of component (c) and component (d) ((b) / ((c)+(d))) is 0.05 or more and 1 or less, and is a transparent liquid at 25°C.

Description

Technical Field

[0001] The present invention relates to hair cosmetics.

Background Art

[0002] In recent years, hair cosmetics such as hair conditioning preparations are also required to have aesthetic properties such as appearance and visual appeal. In addition to the conventionally common white cream-like preparations, there are various preparations such as semi-transparent balm-like ones, but those with excellent aesthetic properties by making the hair cosmetics transparent are known. In this transparent liquid conditioning agent form, a cationic surfactant and an oil component are included as a conditioning base material in the same way as ordinary hair conditioners, but there is a problem that this conditioning component precipitates in the transparent liquid agent form at low temperatures. In response to this problem, Patent Document 1 proposes a system containing (A) a higher alcohol, (B) a polyhydric alcohol having an IOB value of 2 or less, (C) ethanol, (D) a cationic surfactant, (E) an ester oil that is liquid at 25°C, and a phenyl-modified silicone oil. It is said to have an excellent feeling in use, good stability even at low temperatures, and excellent transparency and aesthetic appearance. However, the cosmetic disclosed in Patent Document 1 has a disadvantage that the content of the higher alcohol, which is a conditioning component, is as low as 3% by mass or less, and it is insufficient in terms of the effect of imparting a rich care feeling when applied to the hair.

Prior Art Documents

Patent Documents

[0003] <00000(此处原内容似乎有误,推测应为 )

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention has been made in view of the above circumstances, and aims to provide a hair cosmetic that contains a large amount of conditioning ingredients, is a transparent liquid before use, is easy to apply to the hair, becomes cloudy and thickens when water is added during use to create a rich care feeling during use, provides the hair with a moist and smooth feel, and has excellent stability over time at low temperatures. [Means for solving the problem]

[0005] The inventors diligently researched to solve the above problems and found that in a system containing (a) a single-chain cationic surfactant, (b) a linear higher alcohol having 12 and / or 14 carbon atoms, (c) propylene glycol and / or dipropylene glycol, and (d) ethanol, a transparent liquid cosmetic can be obtained in which a high concentration of higher alcohol (5-45%) can be obtained in the range where the mass ratio of the amount of component (b) to the total amount of components (c) and (d) ((b) / ((c)+(d))) is 0.05 or more and 1 or less. This completed the present invention. The above cosmetic has excellent low-temperature stability over time, suitable for use in winter, and can contain a large amount of conditioning components, thus providing a rich care feeling to the hair.

[0006] In other words, the hair cosmetic composition according to the present invention is (a) A single-chain cationic surfactant in 1 to 7% by mass, (b) 5 to 45% by mass of a linear higher alcohol having 12 and / or 14 carbon atoms, (c) Propylene glycol and / or dipropylene glycol in an amount of 10 to 80% by mass, (d) Ethanol in an amount of 0-70% by mass, (e) Water is 0 to 10% by mass, It contains such that the mass ratio of the amount of component (b) to the total amount of component (c) and component (d) ((b) / ((c)+(d))) is 0.05 or more and 1 or less, It is a clear liquid at 25°C.

[0007] Furthermore, the hair cosmetic composition according to the present invention may contain (f) ethylhexyl palmitate and / or diisostearyl malate in an amount of 0.01 to 5% by mass.

[0008] Furthermore, the hair cosmetic composition according to the present invention may contain 0.01% to 5% by mass of (g) mineral oil. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a hair cosmetic that contains a large amount of conditioning ingredients, is a transparent liquid before use, is easy to apply to the hair, becomes cloudy and thickens when water is added during use, creating a rich care feeling during use, while providing the hair with a moist and smooth feel, and exhibiting excellent stability over time at low temperatures. [Modes for carrying out the invention]

[0010] The embodiments of the present invention will be described in detail below, but the present invention is not limited to the embodiments described below. The present invention is not limited to the configurations described below, and various modifications are possible within the scope of the claims, and embodiments and examples obtained by appropriately combining the technical means disclosed in different embodiments and examples are also included in the technical scope of the present invention. Furthermore, unless otherwise specified in this specification, "A to B" representing a numerical range means "greater than or equal to A and less than or equal to B".

[0011] In this specification, "rich care feeling" refers to the feeling of coating the hair with the product, which is felt by the rich texture of the product when it is applied to the hair, and is caused by the viscosity of the product on wet hair, that is, the high viscosity of the product after hydration and thickening. "Low temperature" refers to a temperature lower than room temperature (25°C), for example, 5 to 15°C, and "having stability over time at low temperatures" means that when left standing for one month at low temperatures, it remains in a transparent liquid state and no precipitates are formed. Furthermore, "transparent appearance" means that there are no precipitates or turbidity at all, and that what is on the other side of the product is clearly visible to the naked eye.

[0012] <Hair Cosmetics> The hair cosmetic composition according to this embodiment comprises (a) a single-chain cationic surfactant, (b) a linear higher alcohol having 12 and / or 14 carbon atoms, (c) propylene glycol and / or dipropylene glycol, and may also contain (d) ethanol and / or (e) water, and is a transparent liquid at 25°C.

[0013] (a) Single-chain cationic surfactants Component (a) used in the hair cosmetic according to this embodiment is a single-chain cationic surfactant. The cationic component adheres specifically to the hair surface and is added as an ingredient that contributes to a smooth finish for the hair.

[0014] (a) The single-chain cationic surfactant used as an ingredient is not particularly limited, but specifically includes lauryltrimonium chloride, cetrimonium chloride, steartrimonium chloride, behentrimonium chloride, lauryltrimonium bromide, cetrimonium bromide, steartrimonium bromide, behentrimonium bromide, lauryl PG trimonium chloride, myristyl PG trimonium chloride, cetyl PG trimonium chloride, stear PG trimonium chloride, behenyl PG trimonium chloride, lauryltrimonium methosulfate, cetrimonium methosulfate, steartrimonium chloride Examples include altrimonium methosulfate, behentrimonium methosulfate, lauryltrimonium ethosulfate, cetrimonium ethosulfate, steartrimonium ethosulfate, behentrimonium ethosulfate, and stearoxypropyltrimonium chloride. These can be used individually or in combination of two or more. In addition, component (a) may be a commercially available product.

[0015] The amount of component (a) used in the hair cosmetic according to this embodiment is 1 to 7% by mass of the total hair cosmetic amount (unless otherwise specified, % refers to mass%). From the viewpoint of achieving a smooth finish for the hair, the amount of component (a) is preferably 2 to 7%. Furthermore, if the amount of component (a) is 7% or less, the stability over time at low temperatures can be maintained. When two or more types of component (a) are used in mixture, the amount of component (a) is the sum of those amounts.

[0016] (b) Linear higher alcohols having 12 and / or 14 carbon atoms. The component (b) used in the hair cosmetic according to this embodiment is a linear higher alcohol having 12 and / or 14 carbon atoms. This component is added to provide a conditioning effect on the hair and, in particular, to contribute to a rich care feel when applied by adding water to the hair cosmetic to make it cloudy and thicken it.

[0017] Examples of linear higher alcohols with 12 and / or 14 carbon atoms include lauryl alcohol and myristyl alcohol, which can be used individually or in mixtures of two or more. Having 12 and / or 14 carbon atoms allows for sustained stability at low temperatures over time while providing a rich, care-like feel upon application.

[0018] The amount of component (b) used in the hair cosmetic according to this embodiment is 5 to 45% of the total composition of the hair cosmetic, preferably 10 to 40%. If the amount of component (b) is 5% or more, a rich care feeling can be sufficiently provided when applied, and if it is 45% or less, the stability over time at low temperatures can be sufficiently improved. When two or more types of component (b) are used in combination, the amount of component (b) is the sum of those amounts.

[0019] <(c) Propylene glycol and / or dipropylene glycol> The component (c) used in the hair cosmetic according to this embodiment is propylene glycol and / or dipropylene glycol. This component is added as a component that contributes to a moist finish on the hair.

[0020] Propylene glycol and / or dipropylene glycol can be used alone or in combination of two or more.

[0021] The blending amount of the component (c) used in the hair cosmetic according to this embodiment is 10 to 80% by mass in the total composition with respect to the entire hair cosmetic, preferably 20 to 80%. If the blending amount of the component (c) is 10% or more, the hair can have a moist finish. Also, if the blending amount of the component (c) is 80% or less, the daily stability at low temperature can be maintained. When two or more kinds of the component (c) are used in combination, the blending amount of the component (c) is the total of them.

[0022] <(d) Ethanol> The hair cosmetic according to this embodiment may contain ethanol as the component (d). Although the hair cosmetic according to this embodiment has sufficient daily stability at low temperature by containing the above-mentioned (a) to (c), the daily stability at low temperature can be further improved by containing ethanol.

[0023] The blending amount of the component (d) used in the hair cosmetic according to this embodiment is 0 to 70% by mass in the total composition with respect to the entire hair cosmetic. From the viewpoint of further improving the daily stability at low temperature of the hair cosmetic according to this embodiment, the content of the component (d) is preferably 15 to 60%.

[0024] Also, in the hair cosmetic according to this embodiment, the mass ratio ((b) / ((c)+(d))) of the blending amount of the component (b) to the total blending amount of the components (c) and (d) is 0.05 or more and 1 or less, preferably 0.07 or more and 0.8 or less. If the mass ratio is 1 or less, the appearance can be kept transparent from normal temperature (25°C) to low temperature.

[0025] <(e) Water> The hair cosmetic composition according to this embodiment may contain water as component (e). The hair cosmetic composition according to this embodiment has transparency in appearance by containing the above-mentioned (a) to (c), but if water is included, the transparency in appearance can be sufficiently maintained at room temperature (25°C) to low temperatures as long as the amount of water is within 10%.

[0026] <(f) Ethylhexyl palmitate and / or diisostearyl malate> The hair cosmetic composition according to this embodiment may optionally contain ethylhexyl palmitate and / or diisostearyl malate as component (f). By including component (f) in the hair cosmetic composition according to this embodiment, the smooth finish of the hair can be further improved.

[0027] Ethylhexyl palmitate and / or diisostearyl malate can be used individually or in combination of two or more.

[0028] In the hair cosmetic composition according to this embodiment, the amount of component (f) used is preferably 0.01 to 5% of the total composition of the hair cosmetic composition, and more preferably 0.1 to 4%. If the amount of component (f) is 5% or less, squeaking during rinsing can be suppressed. When two or more types of component (f) are used in combination, the amount of component (f) is the sum of those amounts.

[0029] <(g) Mineral oil> The hair cosmetic according to this embodiment may optionally contain mineral oil as component (g). By including component (g) in the hair cosmetic according to this embodiment, the manageability of the hair when dry can be improved.

[0030] Mineral oil can be used individually or in combination of two or more types.

[0031] In the hair cosmetic composition according to this embodiment, the amount of component (g) used is preferably 0.01 to 5% of the total composition of the hair cosmetic composition, and more preferably 0.1 to 4%. If the amount of component (g) is 5% or less, squeaky feeling during rinsing can be suppressed. When two or more types of component (g) are used in combination, the amount of component (g) is the sum of those amounts.

[0032] <Other ingredients> In addition to the above-mentioned components, the hair cosmetic composition according to this embodiment may contain other components as appropriate, within the limits that do not impair the effects of the present invention, such as organic acids like lactic acid and citric acid; and other components such as UV absorbers, preservatives, sugars, fragrances, colorants, antioxidants, and various other agents.

[0033] The hair cosmetic composition according to this embodiment contains (a) a single-chain cationic surfactant in an amount of 1 to 7% by mass, (b) Contains 5 to 45% by mass of linear higher alcohols having 12 and / or 14 carbon atoms, (c) Contains 10 to 80% by mass of propylene glycol and / or dipropylene glycol, (d) Contains 0 to 70% by mass of ethanol, and (e) Contains 0 to 10% by mass of water, and (b) / ((c)+(d)) is set to 0.05 or more and 1 or less, so that a large amount of conditioning ingredients can be incorporated, while the product remains a transparent liquid at 25°C before use, is easy to apply to the hair, becomes cloudy and thickens when water is added during use, creating a rich care feeling during use, while providing the hair with a moist and smooth feel, as well as excellent stability over time at low temperatures.

[0034] The hair cosmetic composition according to this embodiment can be manufactured according to conventional methods. Furthermore, the hair cosmetic composition according to this embodiment can preferably be used in rinse-off hair cosmetic compositions such as transparent liquid conditioners, treatments, and hair masks, and more preferably in transparent liquid treatments. [Examples]

[0035] Next, the present invention will be specifically described by illustrating examples and comparative examples, but the present invention is not limited in any way by these examples. First, the test methods and evaluation methods used in each example will be described.

[0036] To evaluate the usefulness of the hair cosmetic, hair was first treated using the following method: Commercially available hair (10g, 30cm, manufactured by Beaulux) was washed with a commercially available hair cleansing cosmetic such as shampoo, rinsed thoroughly with hot water, then 3g of the prepared conditioning composition for evaluation was applied to the hair strands, and rinsed thoroughly again with hot water. After that, the hair was towel-dried and dried with a hairdryer, and the smoothness, moisturizing effect, and manageability of the hair were evaluated.

[0037] <Evaluation of hair samples> Using the hair samples prepared as described above, the following indicators were evaluated.

[0038] • Test of smooth finish on hair (sensory evaluation) Ten trained evaluators conducted a sensory evaluation of the "smoothness of hair" after using each hair cosmetic product, using the following four-point scoring system. The evaluation criteria were based on the average of the scores given by the ten evaluators.

[0039] 4 points: When I ran my fingers through the hair strands, there was no snagging, and it felt as if the conditioning ingredients were evenly coated on the surface of the hair.

[0040] 3 points: When I ran my fingers through the hair strands, there was not much snagging, and it felt as if the conditioning ingredients were coated fairly evenly on the surface of the hair.

[0041] Points 2: When I ran my fingers through the hair strands, there wasn't much snagging, but I didn't feel like the conditioning ingredients were coating the surface of the hair.

[0042] 1 point: I felt some resistance when I ran my fingers through the hair strands, but I didn't feel like the conditioning ingredients were coating the surface of the hair.

[0043] • Test of the moisturizing finish on hair (sensory evaluation) Ten trained evaluators conducted a sensory evaluation of the "moisture level of hair" after using each hair cosmetic product, using the following four-point rating system. The evaluation criteria were based on the average of the scores given by the ten evaluators.

[0044] 4 points: Leaves hair feeling extremely moisturized after use.

[0045] 3 points: Leaves hair feeling moisturized after use.

[0046] Points 2: The hair feels slightly moisturized after use.

[0047] 1 point: The hair doesn't feel moisturized after use.

[0048] • Hair manageability test (sensory evaluation) Ten trained evaluators conducted a sensory evaluation of the "manageability of hair" after using each hair cosmetic product, using the following four-point rating system. The evaluation criteria were based on the average of the scores given by the ten evaluators.

[0049] 4 points: There is no visible frizz or spreading of hair after use.

[0050] 3 points: After use, the hair doesn't appear to spread out much.

[0051] 2 points: After use, the hair appears slightly more spread out.

[0052] 1 point: After use, the hair appears to spread out.

[0053] • Evaluation test for lack of squeaking during rinsing (sensory evaluation) Ten trained evaluators conducted a sensory evaluation of each hair cosmetic product, assessing the "lack of squeaky feeling during rinsing" using a four-point rating system. The evaluation criteria were based on the average of the scores given by the ten evaluators.

[0054] 4 points: When rinsing, the hair slides smoothly when pinched and pulled, without becoming stiff or squeaky.

[0055] 3 points: When rinsing, the hair is smooth and doesn't feel stiff when you pinch and pull it.

[0056] 2 points: When rinsing, the hair doesn't slide very smoothly when you pinch and pull it, and it feels a bit stiff.

[0057] 1 point: When rinsing, the hair doesn't slip when you pinch and pull it, and instead feels squeaky.

[0058] • Stability testing over time (visual evaluation) Each hair cosmetic product was filled into a glass bottle and left standing at 10°C for one month. The long-term stability was evaluated according to the following criteria. The evaluation criteria were as follows:

[0059] ○: Clear liquid with no precipitates. △: Transparent liquid, but with slight precipitates. ×: Not a clear liquid, but contains precipitates. To evaluate the rich care feel when using hair cosmetic products, the following hydration and thickening test was conducted.

[0060] • Water addition viscosity test The appearance change and viscosity of each hair cosmetic product when mixed with water in a 1:1 ratio were measured using a B-type viscometer, and evaluated according to the criteria shown below. This test was conducted only on hair cosmetic products that did not precipitate conditioning components at room temperature and were in a clear liquid state.

[0061] ○: The appearance changes to a cloudy, creamy consistency after mixing with water, and the viscosity is 10,000 mPa·s or higher. △: After mixing with water, the appearance changes to a cloudy white, and the viscosity is between 5000 mPa·s and 10000 mPa·s. ×: Viscosity is less than 5000 mPa·s, regardless of the change in appearance after mixing with water. Blank: Not implemented (Examples and comparative examples) Hair cosmetic compositions with the compositions shown in Tables 1-3 were prepared and evaluated using each test method. The results are also shown in Tables 1-3. Note that the amounts used in all the following examples and comparative examples are all in mass percent.

[0062] [Table 1]

[0063] [Table 2]

[0064] [Table 3]

[0065] As is clear from Tables 1-3, the hair cosmetic compositions in the examples all obtained superior evaluation results compared to the compositions in the comparative examples.

[0066] Other formulation examples of the hair cosmetic of the present invention are listed below. For these formulation examples, the following aspects were also examined: smoothness, moisturizing effect, manageability, long-term stability of the hair cosmetic, and hydration-induced thickening properties that provide a rich care feel.

[0067] Example Formulation 1: Hair Treatment (by mass %) (1) Steartrimonium chloride 6% (2) Myristyl alcohol 20% (3) Dipropylene glycol 40% (4) Ethanol 30% (5) Water 1% (6) Ethylhexyl palmitate 1% (7) Mineral oil 2% A hair treatment with the above composition was prepared using a conventional method, and its smoothness, moisturizing effect, manageability, long-term stability of the hair cosmetic, and hydration-induced thickening properties indicating a rich care feel were evaluated. All of these properties were excellent, and favorable results were obtained.

[0068] Formula Example 2: Hair Treatment (by mass %) (1) Steartrimonium chloride 4% (2) Lauryl alcohol 30% (3) Myristyl alcohol 10% (3) Propylene glycol 25% (4) Dipropylene glycol 10% (4) Ethanol 17% (5) Water 1% (6) Diisostearyl malate 2% (7) Mineral oil 1% A hair treatment with the above composition was prepared using a conventional method, and its smoothness, moisturizing effect, manageability, long-term stability of the hair cosmetic, and hydration-induced thickening properties indicating a rich care feel were evaluated. All of these properties were excellent, and favorable results were obtained.

Claims

1. (a) 1 to 7% by mass of a single-chain cationic surfactant, (b) 5 to 45% by mass of a linear higher alcohol having 12 and / or 14 carbon atoms, (c) propylene glycol and / or dipropylene glycol in an amount of 10 to 80% by mass, (d) Ethanol in an amount of 0 to 70% by mass, (e) Water in a mass of 0 to 10%, It contains such that the mass ratio of the amount of component (b) to the total amount of component (c) and component (d) ((b) / ((c)+(d))) is 0.05 or more and 1 or less, A hair cosmetic that is a transparent liquid at 25°C.

2. (f) The hair cosmetic composition according to claim 1, comprising 0.01 to 5% by mass of ethylhexyl palmitate and / or diisostearyl malate.

3. (g) A hair cosmetic composition according to claim 1 or 2, containing 0.01% to 5% by mass of mineral oil.

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