Nonaqueous composition and hair treatment method

Abstract

To provide a nonaqueous composition that is suitable for reducing an amount of use of volatile cyclic silicone, contains an ultraviolet absorber and is applied to the skin or hair, and a hair treatment method that uses the nonaqueous composition for anti-ultraviolet measures.SOLUTION: A nonaqueous composition contains an ultraviolet absorber and a volatile hydrocarbon and is for skin or hair. A hair treatment method treats hair with the nonaqueous composition.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a non-aqueous composition for skin or hair, and a method for treating hair using the non-aqueous composition. [Background technology]

[0002] Hair is exposed to sunlight in daily life and is affected by the ultraviolet rays contained in sunlight. Reported effects include hair damage and discoloration of hair that has been color-treated. It is also widely known that the skin is affected by ultraviolet rays.

[0003] It is well known that UV absorbers are added to hair cosmetics to protect hair from UV rays, and there are hair products on the market. Some of these products are labeled with PA (Protection Grade of UVA), which is an index of protection against UVA rays, or SPF (Sun Protection Factor), which is an index of protection against UVB rays, and this labeling can increase consumer purchasing interest. In addition, the skin-protecting function indicated by PA or SPF (hereinafter sometimes referred to as "PA, etc.") can be said to be applicable to skin applications.

[0004] Hair cosmetics containing ultraviolet absorbents are also disclosed in the literature, and for example, Patent Document 1 discloses a non-aqueous hair cosmetic containing an ultraviolet absorbent, a volatile cyclic silicone, and the like. This cosmetic is non-aqueous, and therefore can impart a different feel to hair than aqueous products. However, the volatile cyclic silicone is a versatile ingredient that is used in non-aqueous hair cosmetics, and the demand for cosmetics is increasing worldwide, so there are cases where the supply of the volatile cyclic silicone is a concern. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2017-109954 A Summary of the Invention [Problem to be solved by the invention]

[0006] In view of the above circumstances, an object of the present invention is to provide a non-aqueous composition that is applied to skin or hair and contains an ultraviolet absorber, which is suitable for reducing the amount of volatile cyclic silicone used, and a hair treatment method that uses the non-aqueous composition for ultraviolet protection. [Means for solving the problem]

[0007] The non-aqueous composition according to the present invention is for skin or hair, and contains an ultraviolet absorbing agent and a liquid hydrocarbon.

[0008] The non-aqueous composition according to the present invention preferably has a viscosity of 50 mPa·s or more. A viscosity of 50 mPa·s or more is suitable for improving PA, etc. (PA or SPF).

[0009] The non-aqueous composition according to the present invention contains a volatile hydrocarbon as the liquid hydrocarbon, and the amount of the volatile hydrocarbon is preferably 20% by mass or more, and preferably 30% by mass or more. Although volatile cyclic silicones such as decamethylcyclopentasiloxane, which are classified as volatile silicones, are highly versatile components and the demand for cosmetics is increasing worldwide, so that there are concerns about the supply, the incorporation of 20% by mass or more of the volatile hydrocarbon is suitable for suppressing the amount of volatile cyclic silicones used.

[0010] In the non-aqueous composition according to the present invention, the volatile hydrocarbon may be a volatile hydrocarbon having a lower kinetic viscosity than decamethylcyclopentasiloxane. By blending a volatile hydrocarbon having a low kinetic viscosity, decamethylcyclopentasiloxane can be substituted. In addition, when blending the volatile hydrocarbon as a substitute, there is a risk of a decrease in PA, etc. due to a decrease in the viscosity of the non-aqueous composition, but by setting the viscosity of the non-aqueous composition to 50 mPa s or more as described above, the decrease in PA, etc. can be suppressed.

[0011] The non-aqueous composition according to the present invention preferably contains an ultraviolet absorbing agent in an amount of 1.0% by mass or more. Since the incorporation of a certain amount of an ultraviolet absorbing agent is effective for protecting the skin or hair from ultraviolet rays, it is preferable that the amount of the ultraviolet absorbing agent is 1.0% by mass or more.

[0012] The non-aqueous composition according to the present invention may preferably contain no volatile cyclic silicone or may contain a greater amount of the liquid hydrocarbon than the volatile cyclic silicone, which is suitable for reducing the amount of volatile cyclic silicone used.

[0013] The hair treatment method according to the present invention is characterized by using the non-aqueous composition according to the present invention. Effect of the Invention

[0014] According to the non-aqueous composition of the present invention, a liquid hydrocarbon is blended together with an ultraviolet absorbing agent, so that it is possible to protect the skin or hair from ultraviolet rays while reducing the amount of volatile cyclic silicone used.

[0015] Furthermore, according to the hair treatment method of the present invention, a non-aqueous composition containing a liquid hydrocarbon together with an ultraviolet absorber is used, making it possible to protect the skin or hair from ultraviolet rays while reducing the amount of volatile cyclic silicone used. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The present invention will be described below based on the embodiments of the present invention. The non-aqueous composition according to this embodiment contains an ultraviolet absorber and a liquid hydrocarbon, and is used for skin or hair.

[0017] The composition of the present embodiment is non-aqueous, and "non-aqueous" means that the external phase of the composition does not have an oil phase or an aqueous phase. Since the incorporation of water easily causes separation of the aqueous phase and the oil phase and the composition to become cloudy, it is preferable not to incorporate water, and when water is incorporated, the amount of water incorporated is preferably less than 5.0 mass%, preferably less than 3.0 mass%, more preferably less than 1.0 mass%, even more preferably less than 0.5 mass%, and even more preferably less than 0.1 mass%.

[0018] The viscosity of the non-aqueous composition of this embodiment is preferably 50 mPa·s or more and less than 5000 mPa·s, preferably 100 mPa·s or more and less than 3000 mPa·s, more preferably 150 mPa·s or more and less than 1000 mPa·s, even more preferably 200 mPa·s or more and less than 800 mPa·s, and even more preferably 200 mPa·s or more and less than 600 mPa·s. A viscosity of 50 mPa·s or more is suitable for UV protection of the skin or hair and for ease of handling when applying the non-aqueous composition of this embodiment by hand, and a viscosity of less than 5000 mPa·s is suitable for penetration into the inside of hair.

[0019] The viscosity of the non-aqueous composition of the present embodiment is measured using a rheometer (e.g., a rheometer "Rheo Stress 6000 (product name)" manufactured by HAAKE), at a measurement temperature of 25°C, a diameter of a cone-plate sensor of 35 mm, an inclination angle of the cone-plate sensor of 2°, and a shear rate dγ / dt of 36 s -1 This value is measured in a steady flow curve mode under the conditions.

[0020] When it is necessary to increase the viscosity of the non-aqueous composition of the present embodiment, it is advisable to use a general method for increasing viscosity. For example, to increase the viscosity by adding a component (the component is referred to as an "additional component" for convenience), a component having a higher viscosity than the composition before the component is added is used as the additional component. The additional component is not limited to a single component such as ester oil, but also includes a multi-component such as a decamethylcyclopentasiloxane solution of a highly polymerized methylpolysiloxane or an isododecane solution of a highly polymerized methylpolysiloxane.

[0021] The ultraviolet absorbent blended in the non-aqueous composition of the present embodiment is a known one, and examples thereof include benzoate-based ultraviolet absorbents (2-[4-(diethylamino)-2-hydroxybenzoyl]hexyl benzoate, para-aminobenzoic acid, ethyl para-aminobenzoate, glyceryl para-aminobenzoate, amyl para-dimethylaminobenzoate, ethyl 4-[N,N-di(2-hydroxypropyl)amino]benzoate, etc.), salicylic acid-based ultraviolet absorbents (ethylene glycol salicylate, 2-ethylhexyl salicylate, homomenthyl salicylate, etc.), cinnamic acid-based ultraviolet absorbents (2-ethylhexyl paramethoxycinnamate, glyceryl di-paramethoxycinnamate mono-2-ethylhexanoate, isopropyl paramethoxycinnamate, 2-ethylhexyl paramethoxycinnamate, diisopropyl cinnamate, etc.), benzophenone-based ultraviolet absorbents (dihydroxydimethoxybenzophenone, diheptyl cinnamate, diphenyl ether ... hydroxydimethoxybenzophenone disulfonate sodium, dihydroxybenzophenone, tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, hydroxymethoxybenzophenone sulfonic acid, hydroxymethoxybenzophenone sulfonic acid, hydroxymethoxybenzophenone sodium sulfonate, etc.), 2-cyano-3,3-diphenylprop-2-enoic acid 2-ethylhexyl ester, anthranilate menthyl, terephthalidenedicamphorsulfonic acid, 2,4,6-tris[4-(2-ethylhexyloxycarbonyl)anilino]-1,3,5-triazine, bisethylhexyloxyphenol methoxyphenyl triazine, 4-tert-butyl-4'-methoxy-dibenzoylmethane, 2,2'-methylenebis(6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol).

[0022] The non-aqueous composition of this embodiment contains one or more ultraviolet absorbents, and the amount of the ultraviolet absorbent in the non-aqueous composition of this embodiment is preferably 1.0% by mass or more and less than 30% by mass, more preferably 2.0% by mass or more and less than 25% by mass, more preferably 3.0% by mass or more and less than 20% by mass, and even more preferably 5.0% by mass or more and less than 18% by mass. When the amount of the ultraviolet absorbent is 1.0% by mass or more, it is suitable for protecting the skin or hair from ultraviolet rays, and when the amount is less than 30% by mass, it is suitable for reducing costs.

[0023] The liquid hydrocarbons to be blended in the non-aqueous composition of the present embodiment are known, and examples thereof include hydrogenated polyisobutene (heavy liquid isoparaffin, light liquid isoparaffin, etc.), mineral oil, and isododecane. The non-aqueous composition of the present embodiment may be blended with one or more liquid hydrocarbons, and the blending amount of the liquid hydrocarbons in the non-aqueous composition of the present embodiment is, for example, 10% by mass or more and less than 90% by mass.

[0024] In the case where volatility is required in the liquid hydrocarbon, as in the case of volatile cyclic silicones, a volatile hydrocarbon is blended as the liquid hydrocarbon in the non-aqueous composition of this embodiment. Volatile hydrocarbons have features such as a smaller latent heat of vaporization compared to water, making it difficult to feel cold, and improving the ease of running fingers through hair, making them suitable as a solvent for non-aqueous compositions.

[0025] When a volatile hydrocarbon is blended into the non-aqueous composition of this embodiment, the volatile hydrocarbon may be a known volatile hydrocarbon such as light liquid isoparaffin or isododecane, and preferably has a boiling point of 260° C. or less at normal pressure. Even if the volatile hydrocarbon to be blended has a lower kinetic viscosity than decamethylcyclopentasiloxane, it is possible to suppress or improve the decrease in PA, etc. by increasing the viscosity of the non-aqueous composition of this embodiment (here, the kinetic viscosity is a value measured according to JIS K-2283).

[0026] The non-aqueous composition of the present embodiment contains one or more volatile hydrocarbons, and the amount of the volatile hydrocarbons in the non-aqueous composition is preferably 20% by mass or more and less than 90% by mass, more preferably 30% by mass or more, more preferably 45% by mass or more, even more preferably 60% by mass or more, and even more preferably 70% by mass or more. If the amount is 20% by mass or more, it is suitable for reducing the amount of volatile cyclic silicone used, the supply of which is a concern.

[0027] The non-aqueous composition of the present embodiment contains a volatile linear silicone (having a kinetic viscosity of 2 mm at 25° C. 2 Known volatile silicones such as silicones having a viscosity of about 1 / s or less, volatile cyclic silicones (octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, etc.), and trimethicone may be blended. It is preferable to blend one or more types of volatile silicones, and the blending amount of the volatile silicone in the non-aqueous composition of the present embodiment is, for example, 5% by mass or more and less than 30% by mass.

[0028] From the viewpoint of reducing the amount of volatile cyclic silicone used, it is preferable that the nonaqueous composition of this embodiment contains a greater amount of liquid hydrocarbon than volatile cyclic silicone, and it is more preferable that no volatile cyclic silicone is contained.

[0029] In addition to the above-mentioned components, the non-aqueous composition of the present embodiment can contain any known cosmetic raw materials depending on the intended use of the composition. Examples of the raw materials that can be optionally contained include nonionic surfactants, cationic surfactants, anionic surfactants, amphoteric surfactants, higher alcohols, hydrocarbons, waxes, ester oils, vegetable oils, silicones, polymeric compounds, wetting agents, preservatives, chelating agents, fragrances, and colorants.

[0030] The non-aqueous composition of the present embodiment is for skin or hair, and is preferably applied to the skin or hair in order to suppress the effects of ultraviolet rays. For example, when the non-aqueous composition of the present embodiment is used for hair treatment, the non-aqueous composition may be in a liquid form, sprayed or applied by hand to the hair, and then dried with hot air as necessary without being washed off. EXAMPLES

[0031] The present invention will be described in detail below with reference to examples, but the present invention should not be construed as being limited to the descriptions of these examples.

[0032] Non-aqueous compositions of Examples, Comparative Examples, and Reference Examples were prepared, and their viscosity, SPF, and UVAPF were measured. The details are as follows.

[0033] (Non-aqueous composition) The non-aqueous compositions of the Examples, Comparative Examples, and Reference Examples were prepared by mixing 2-cyano-3,3-diphenylprop-2-enoic acid 2-ethylhexyl ester, 4-tert-butyl-4'-methoxydibenzoylmethane, bisethylhexyloxyphenol methoxyphenyl triazine, 2-ethylhexyl paramethoxycinnamate, 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoic acid hexyl ester, 2-ethylhexyl isononanoate, dicaprylyl carbonate, and dimer dilinoleic acid. Mixture of dimer dilinoleyl, highly polymerized methylpolysiloxane, and decamethylcyclopentasiloxane (viscosity measured 60 seconds after the start of measurement using a Brookfield viscometer at 25°C and a rotor speed of 60 rpm: 5000 mPa s), mixture of highly polymerized methylpolysiloxane and isododecane (viscosity measured 60 seconds after the start of measurement using a Brookfield viscometer at 25°C and a rotor speed of 60 rpm: 2700 mPa s), heavy liquid isoparaffin, isododecane (kinematic viscosity at 37.8°C: 1.35 mm 2 The details of the blended components and their blended amounts (blending amount unit: parts by mass) are shown in Tables 1 to 5.

[0034] (viscosity) The viscosity of each non-aqueous composition was measured using a rheometer "Rheo Stress 6000" manufactured by HAAKE, at a measurement temperature of 25°C, a diameter of the cone-plate sensor of 35 mm, an inclination angle of the cone-plate sensor of 2°, and a shear rate dγ / dt of 36 s. -1 The measurements were performed under the following conditions.

[0035] (SPF, UVAPF) For each non-aqueous composition, SPF and UVAPF (UVAPF: an index for determining the PA level) measurements were performed using an in vitro test method, with 0.0325 g of the non-aqueous composition applied to a Helioscreen "HELIOPLATE" and a Labsphere "UV2000S" SPF analyzer.

[0036] Table 1 below shows the ingredients, their amounts, viscosity, SPF, and UVAPF blended in Comparative Example 1a, Examples 1a-1b, and Examples 2a-2b. From the SPF and UVAPF values ​​shown in Examples 1a-1b and 2a-2b blended with liquid hydrocarbons (heavy liquid isoparaffin, isododecane), it can be confirmed that UV protection is possible even if the amount of decamethylcyclopentasiloxane, a volatile cyclic silicone, is reduced or not blended. In addition, a comparison between Comparative Example 1a and Examples 1a-1b and a comparison between Examples 2a-2b confirms that the higher the viscosity, the higher the SPF or UVAPF value.

[0037] [Table 1]

[0038] The following Tables 2 to 5 show the components blended in each Reference Example, their blended amounts, viscosity, SPF, and UVAPF. Although the results in Tables 2 to 5 do not include liquid hydrocarbons, when the blended component system is the same, it can be confirmed that the higher the viscosity, the higher the SPF or UVAPF value, as in the results in Table 1. In other words, regardless of whether liquid hydrocarbons are blended or not, there is a relationship between viscosity and SPF or UVAPF.

[0039]

Table 2

[0040]

Table 3

[0041]

Table 4

[0042]

Table 5

Claims

1. A non-aqueous composition for skin or hair containing an ultraviolet absorbing agent and a liquid hydrocarbon.

2. 2. The non-aqueous composition according to claim 1, having a viscosity of 50 mPa·s or more.

3. 3. The non-aqueous composition according to claim 1, wherein the liquid hydrocarbon is a volatile hydrocarbon, and the amount of the volatile hydrocarbon is 20 mass % or more.

4. The non-aqueous composition according to claim 3 , wherein the amount of the volatile hydrocarbon is 30% by mass or more.

5. 5. The non-aqueous composition according to claim 3, wherein the volatile hydrocarbon has a kinetic viscosity lower than that of decamethylcyclopentasiloxane.

6. The non-aqueous composition according to any one of claims 1 to 5, wherein the ultraviolet absorber is contained in an amount of 1.0% by mass or more.

7. 7. The non-aqueous composition according to any one of claims 1 to 6, which is free of a volatile cyclic silicone or contains a larger amount of the liquid hydrocarbon than the volatile cyclic silicone.

8. A hair treatment method, comprising using the non-aqueous composition according to any one of claims 1 to 7.

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