Nonaqueous composition and hair treatment method

Abstract

To provide a nonaqueous composition useful for anti-ultraviolet measures such as control of PA (Protection Grade of UVA) or SPF (Sun Protection Factor), and a hair treatment method.SOLUTION: A nonaqueous composition is for skin or hair and has a viscosity of 10 mPa s or more and has a blending amount of an ultraviolet absorber of 0.5 mass% or more (where the ultraviolet absorber does not include 2-ethylhexyl-p-methoxycinnamate or 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoic acid hexyl ester). The hair treatment method uses 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 absorbers are also disclosed in the literature, for example, Patent Document 1 discloses a non-aqueous hair cosmetic containing 2-ethylhexyl paramethoxycinnamate and 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoic acid hexyl ester as a specific cosmetic (see Examples and Comparative Examples). In addition, Patent Document 2 also discloses a hair cosmetic containing 2-ethylhexyl paramethoxycinnamate and 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoic acid hexyl ester (see Claim 1), and since the hair cosmetic can be sprayed in a mist form (paragraph 0001), it can be understood to be of low viscosity. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2017-109954 A [Patent Document 2] JP 2013-107838 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, depending on the type of ultraviolet absorber, the wavelength range of ultraviolet light that is specifically absorbed, the stability, the cost, etc., may differ, and it may be necessary to add ultraviolet absorbers other than 2-ethylhexyl paramethoxycinnamate and 2-[4-(diethylamino)-2-hydroxybenzoyl]hexyl benzoate and adjust the amount of the added ultraviolet absorbers. By selecting these ultraviolet absorbers and adjusting the amount, it is possible to adjust PA, etc. Furthermore, since hair has the same keratin as the skin as a constituent protein, the adjustment of PA, etc. is expected to be useful for UV protection not only for the skin but also for hair. However, the adjustment of PA, etc. may be limited due to reasons such as the cost of ultraviolet absorbers and instability in supply.

[0007] In view of the above circumstances, an object of the present invention is to provide a non-aqueous composition that is useful for UV protection, such as adjusting PA or SPF, and a hair treatment method using the composition. [Means for solving the problem]

[0008] As a result of intensive research, the present inventors discovered that increasing the viscosity of a non-aqueous composition is useful for UV protection, such as improving the PA or SPF, and have thus completed the present invention.

[0009] That is, the non-aqueous composition according to the present invention is for skin or hair and contains an ultraviolet absorber, and is characterized in that it has a viscosity of 10 mPa·s or more and the amount of the ultraviolet absorber is 0.5 mass% or more (however, this means the amount of ultraviolet absorbers other than 2-ethylhexyl paramethoxycinnamate and 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoic acid hexyl ester, the same applies below). In the present invention, the viscosity is set to 10 mPa·s or more in order to improve PA, etc. Also, in the present invention, since the incorporation of a certain amount or more of an ultraviolet absorber is effective for ultraviolet protection of skin or hair, the amount of the ultraviolet absorber is set to 0.5 mass% or more, and the composition has a non-aqueous configuration in order to impart a different feel to the skin or hair from aqueous compositions.

[0010] 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 and the like.

[0011] The non-aqueous composition according to the present invention preferably contains the ultraviolet absorbing agent in an amount of 1.0% by mass or more, which is suitable for improving PA and the like.

[0012] The non-aqueous composition according to the present invention is, for example, a composition containing volatile silicone in an amount of 40 mass% or more. Even in a non-aqueous composition containing 40 mass% or more of volatile silicone, the PA and the like are improved when the viscosity is increased.

[0013] The non-aqueous composition according to the present invention is, for example, one that contains a volatile hydrocarbon, and the amount of the volatile hydrocarbon is 20% by mass or more. Even in a non-aqueous composition containing 20% ​​by mass or more of a volatile hydrocarbon, the PA and the like are improved when the viscosity is increased. In addition, 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 cases where supply is a concern. However, the incorporation of 20% by mass or more of a volatile hydrocarbon is suitable for suppressing the amount of volatile cyclic silicones used.

[0014] 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. When a volatile hydrocarbon having a lower kinetic viscosity than decamethylcyclopentasiloxane is blended, if this blend is a substitute for decamethylcyclopentasiloxane, there is a risk of a decrease in PA, etc. due to a decrease in the viscosity of the non-aqueous composition. However, by setting the viscosity to 10 mPa s or more as in the present invention, the decrease in PA, etc. can be suppressed.

[0015] 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

[0016] The non-aqueous composition according to the present invention contains 0.5% by mass or more of a specific ultraviolet absorbing agent and has a viscosity of 10 mPa·s or more, and therefore is excellent in protecting the skin or hair from ultraviolet rays.

[0017] Furthermore, according to the hair treatment method of the present invention, a non-aqueous composition containing 0.5 mass % or more of a specified ultraviolet absorber and having a viscosity of 10 mPa s or more is used, thereby enabling excellent ultraviolet protection for the skin or hair. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The present invention will be described below based on the embodiments of the present invention. The non-aqueous composition according to this embodiment has a viscosity of 10 mPa·s or more, contains a prescribed ultraviolet absorbing agent in an amount of 0.5 mass % or more, and is used for skin or hair.

[0019] 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%.

[0020] The viscosity of the non-aqueous composition of the present embodiment is 10 mPa·s or more. Here, the viscosity is measured using a rheometer (for example, 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.

[0021] The viscosity is preferably from 10 mPa·s to less than 5000 mPa·s, more preferably from 20 mPa·s to less than 3000 mPa·s, more preferably from 50 mPa·s to less than 1000 mPa·s, even more preferably from 100 mPa·s to less than 800 mPa·s, and even more preferably from 200 mPa·s to less than 600 mPa·s. A viscosity of 10 mPa·s or more is suitable for UV protection of the skin or hair and for ease of handling when applying the nonaqueous composition of this embodiment by hand, and a viscosity of less than 5000 mPa·s is suitable for penetration into the interior of hair.

[0022] When it is necessary to increase the viscosity of the non-aqueous composition of the present embodiment, a general method for increasing viscosity is For example, to increase the viscosity by adding a component (for convenience, the component is referred to as the "additional component"), a component having a higher viscosity than the composition before the component is blended is used as the additional component. The additional component is not limited to a single component such as ester oil, but also includes a component consisting of multiple components such as a decamethylcyclopentasiloxane solution of highly polymerized methylpolysiloxane or an isododecane solution of highly polymerized methylpolysiloxane.

[0023] The non-aqueous composition of the present embodiment contains an ultraviolet absorber other than 2-ethylhexyl paramethoxycinnamate and 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoic acid hexyl ester (hereinafter, sometimes referred to as a "predetermined ultraviolet absorber") as an essential component.

[0024] The above-mentioned predetermined ultraviolet absorber is a known ultraviolet absorber, and examples thereof include benzoate-based ultraviolet absorbers (paraaminobenzoic acid, ethyl paraaminobenzoate, glyceryl paraaminobenzoate, amyl paradimethylaminobenzoate, ethyl 4-[N,N-di(2-hydroxypropyl)amino]benzoate, etc.), salicylic acid-based ultraviolet absorbers (ethylene glycol salicylate, 2-ethylhexyl salicylate, homomenthyl salicylate, etc.), cinnamic acid-based ultraviolet absorbers (glyceryl di-paramethoxycinnamate mono 2-ethylhexanoate, isopropyl paramethoxycinnamate, 2-ethylhexyl paramethoxycinnamate, diisopropyl cinnamate, etc.), benzophenone-based ultraviolet absorbers (dihydroxydimethoxybenzophenone, sodium dihydroxydimethoxybenzophenone disulfonate, dihydroxybenzyl benzoate, sodium ... benzophenone, tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, hydroxymethoxybenzophenone sulfonic acid, hydroxymethoxybenzophenone sulfonic acid, sodium hydroxymethoxybenzophenone sulfonate, etc.), 2-cyano-3,3-diphenylprop-2-enoic acid 2-ethylhexyl ester, menthyl anthranilate, terephthalylidene dicamphor sulfonic 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).

[0025] The above-mentioned predetermined ultraviolet absorbent is blended in one or more kinds in the non-aqueous composition of this embodiment, and the blending amount of the above-mentioned predetermined ultraviolet absorbent in the non-aqueous composition of this embodiment is 0.5 mass% or more. Some known compositions contain a small amount of ultraviolet light to improve the stability of the composition itself against light such as sunlight, but the blending amount of the non-aqueous composition of this embodiment is 0.5 mass% or more as described above in order to protect the skin or hair from ultraviolet rays. The blending amount of the above-mentioned predetermined ultraviolet absorbent is preferably 1.0 mass% or more and less than 30 mass%, preferably 2.0 mass% or more and less than 25 mass%, more preferably 3.0 mass% or more and less than 20 mass%, and even more preferably 5.0 mass% or more and less than 18 mass%. When the blending amount of the predetermined ultraviolet absorbent is 1.0 mass% or more, it is suitable for protecting the skin or hair from ultraviolet rays, and when the blending amount is less than 30 mass%, it is suitable for reducing costs.

[0026] When the above-mentioned specific ultraviolet absorber is blended, 2-ethylhexyl paramethoxycinnamate and / or 2-[4-(diethylamino)-2-hydroxybenzoyl]hexyl benzoate can be blended optionally in the non-aqueous composition of this embodiment. When this optional blending is performed, the blending amount in the non-aqueous composition of this embodiment is, for example, 2.0 mass% or more and less than 10 mass% for 2-ethylhexyl paramethoxycinnamate, and 0.5 mass% or more and less than 4.0 mass% for 2-[4-(diethylamino)-2-hydroxybenzoyl]hexyl benzoate.

[0027] Some non-aqueous hair compositions contain volatile silicone and / or volatile hydrocarbon, and the non-aqueous hair composition of the present embodiment can contain any of volatile silicone, volatile hydrocarbon, or volatile silicone and volatile hydrocarbon. Compared to water, volatile silicone and volatile hydrocarbon have a small latent heat of vaporization, so they are less likely to feel cold, and they have the characteristic of improving the smoothness of hair, making them suitable as a solvent for non-aqueous hair compositions. When volatile silicone and volatile hydrocarbon are contained, the amount of volatile silicone and volatile hydrocarbon contained in the non-aqueous hair composition of the present embodiment is, for example, 40% by mass or more and less than 90% by mass.

[0028] When a volatile silicone is blended in the non-aqueous composition of the present embodiment, the volatile silicone may be, for example, a volatile cyclic silicone (octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane), a volatile linear silicone (having a kinetic viscosity of 2 mm at 25° C.), or a volatile cyclic silicone (having a kinetic viscosity of 2 mm at 25° C.). 2 One or more kinds of volatile silicones may be blended into the non-aqueous composition of the present embodiment. The blending amount of the volatile silicone in the non-aqueous composition of the present embodiment is, for example, 40% by mass or more and less than 90% by mass.

[0029] Decamethylcyclopentasiloxane, a type of volatile silicone, is widely used because of its excellent usability, low cost, etc. When decamethylcyclopentasiloxane is blended into the non-aqueous composition of the present embodiment, the blending amount is, for example, 40% by mass or more and less than 90% by mass.

[0030] 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).

[0031] 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, for example, 20% by mass or more and less than 90% by mass. The amount is preferably 30% by mass or more, more preferably 40% by mass or more, more preferably 50% 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 30% by mass or more, it is suitable for reducing the amount of volatile cyclic silicone used, the supply of which is a concern.

[0032] 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.

[0033] 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

[0034] 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.

[0035] 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.

[0036] (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.

[0037] (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.

[0038] (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.

[0039] The ingredients, their amounts, viscosity, SPF, and UVAPF used in Comparative Example 1a, Examples 1a-1b, Comparative Example 2a, and Examples 2a-2b are shown in Table 1. Comparisons between Comparative Example 1a and Examples 1a-1b, and between Comparative Example 2a and Examples 2a-2b, which use the same ingredients, confirm that the higher the viscosity, the higher the SPF or UVAPF value.

[0040] [Table 1]

[0041] The ingredients, their amounts, viscosity, SPF, and UVAPF used in Comparative Example 3a, Examples 3a-3b, Comparative Example 4a, Examples 4a-4b, Examples 5a-5b, Examples 6a-6b, and Examples 7a-7b are shown in Tables 2 and 3. When the ingredients used are the same, it can be seen that the higher the viscosity, the higher the SPF or UVAPF value, as in the results in Table 1.

[0042] [Table 2]

[0043] [Table 3]

[0044] Tables 4 and 5 below show the ingredients, their blended amounts, viscosity, SPF, and UVAPF blended in Reference Examples 1a, 1a-1b, 2a, 2a-2b, and 3a-3b. The results in Tables 4 and 5 do not include UV absorbers other than 2-ethylhexyl paramethoxycinnamate and 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoic acid hexyl ester, but when the blended ingredients are 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 the type of UV absorber, there is a relationship between viscosity and SPF or UVAPF.

[0045] [Table 4]

[0046]

Table 5

Claims

1. A non-aqueous composition for skin or hair containing an ultraviolet absorbing agent, Viscosity is 10 mPa·s or more, The blending amount of the ultraviolet absorber is 0.5% by mass or more (however, this means the blending amount of the ultraviolet absorber other than 2-ethylhexyl paramethoxycinnamate and 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoic acid hexyl ester, the same applies hereinafter). Non-aqueous composition.

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

3. The non-aqueous composition according to claim 1 or 2, wherein the content of the ultraviolet absorber is 1.0% by mass or more.

4. The non-aqueous composition according to any one of claims 1 to 3, further comprising a volatile silicone in an amount of 40 mass% or more.

5. 5. The non-aqueous composition according to claim 1, further comprising a volatile hydrocarbon in an amount of 20 mass % or more.

6. 6. The non-aqueous composition according to claim 5, wherein the volatile hydrocarbon is a volatile hydrocarbon having a kinematic viscosity lower than that of decamethylcyclopentasiloxane.

7. A hair treatment method, comprising using the non-aqueous composition according to any one of claims 1 to 6.

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