Whitening cosmetic

Abstract

To provide a whitening cosmetic which reduces the stickiness from whitening active ingredients, has high transparency, and demonstrates excellent usability and stability, through the combined use of specific ingredients.SOLUTION: A whitening cosmetic is provided that contains the following (A) to (D): (A) one or more selected from the group consisting of tranexamic acid, ascorbic acid derivatives, arbutin, and niacinamide; (B) tetraester oil; (C) inulin fatty acid ester; and (D) dimer acid ester.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a skin whitening cosmetic composition. [Background technology]

[0002] When considering compositions that can be used in cosmetics, etc., technological development is being carried out to increase added value, such as by combining various ingredients. In general, cosmetics are required to have a wide range of functions, such as high UV protection and whitening effects. However, when a large amount of metal oxide is added in hopes of achieving a high sunscreen effect, there are problems such as the cosmetic not being transparent when applied to the skin (leaving a white cast) and the occurrence of a squeaky feeling due to the metal oxide. In addition, when whitening active ingredients are added, there are problems such as stickiness and poor skin compatibility, and intensive research is being conducted to solve these problems.

[0003] In recent years, products that combine multiple effects have been developed (Patent Document 1). Patent Document 2 describes a sunscreen cosmetic that contains squalane to reduce stickiness and provide transparency. However, no consideration was given to squeaking, and there was room for further improvement in transparency. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-199451 A [Patent Document 2] Patent No. 6445787 DISCLOSURE OF THEINVENTION [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a whitening cosmetic composition which reduces stickiness caused by a whitening active ingredient, has high transparency, and has a good feel and stability when used, by using specific ingredients in combination. [Means for solving the problem]

[0006] The object of the present invention is to provide a whitening cosmetic composition containing the following (A) to (D): (A) one or more selected from the group consisting of tranexamic acid, ascorbic acid derivatives, arbutin, and niacinamide (B) Tetraester oil (C) Inulin fatty acid ester (D) Dimer acid ester Effect of the Invention

[0007] The whitening cosmetic composition of the present invention, by using specific ingredients in combination, exhibits the effects of reducing stickiness caused by the whitening active ingredient, having high transparency, a good feel in use and stability. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described.

[0009] [Tranexamic acid] Tranexamic acid that can be incorporated in the whitening cosmetic composition of the present invention is a water-soluble t-cycloamino acid derivative, and there are no particular limitations on the raw materials, production method, purification method, etc., so long as it is one that is usually used in cosmetics, etc.

[0010] [Ascorbic acid derivatives] Ascorbic acid derivatives that can be incorporated into the whitening cosmetic composition of the present invention are not particularly limited in terms of raw materials, production method, purification method, etc., as long as they are those that are normally used in cosmetics, etc. Specific examples of vitamin C derivatives include trisodium ascorbyl palmitate phosphate, ascorbyl tetrahexyldecanoate, potassium (ascorbyl / tocoheryl) phosphate, ascorbyl-2-phosphate-6 palmitate, ascorbyl glucoside, sodium ascorbyl phosphate, magnesium ascorbyl phosphate, etc. In the present invention, it is preferable to use ascorbyl glucoside in terms of its effects. These ascorbic acid derivatives may be used alone or in combination of two or more.

[0011] [Arbutin] The arbutin that can be blended in the whitening cosmetic composition of the present invention can be either β-arbutin or α-arbutin. Either one can be used alone or in combination, and there is no particular restriction on the raw material, production method, purification method, etc., as long as it is one that is normally used in cosmetics, etc.

[0012] [Niacinamide] Niacinamide that can be blended in the whitening cosmetic composition of the present invention is a water-soluble vitamin that is one of the vitamin B group, and is also called nicotinamide. There are no particular limitations on the raw materials, production method, purification method, etc., as long as it is one that is usually used in cosmetics, etc.

[0013] The above component (A) may be used alone or in combination of two or more. The amount of component (A) is preferably 0.01 to 7% by mass, more preferably 0.1 to 6% by mass, based on the total amount of the whitening cosmetic composition of the present invention. If the amount is less than 0.01% by mass, the effect may not be exhibited. If the amount is more than 7% by mass, the feeling of use may be undesirable.

[0014] [Tetraester oil] The tetraester oil (B) used in the present invention is not particularly limited as long as it is a component that is usually used in cosmetics, etc. Examples of the tetraester oil include pentaerythrityl tetraethylhexanoate, pentaerythrityl tetraisostearate, dipentaerythrityl tetraisostearate, diglyceryl tetraisostearate, pentaerythrityl tetraoctanoate, etc. Among these, it is preferable to use pentaerythrityl tetraethylhexanoate from the viewpoint of effectiveness.

[0015] Component (B) may be used alone or in combination of two or more kinds. The blending amount of component (B) is in the range of 0.01 to 15 mass %, preferably 0.05 to 10 mass %, more preferably 0.1 to 7 mass %, based on the total amount of the whitening cosmetic composition of the present invention.

[0016] [Inulin fatty acid ester] The inulin fatty acid ester (C) used in the present invention is not particularly limited as long as it is a component that is usually used in cosmetics and the like. The inulin fatty acid ester is an ester of inulin and a linear or branched, saturated or unsaturated fatty acid having 6 to 32 carbon atoms, and the average degree of substitution is preferably 1 to 3 per monosaccharide, and the average sugar polymerization degree of inulin is preferably 10 to 60. Examples include inulin stearate, inulin palmitate, inulin myristic acid, etc., and inulin stearate is particularly preferred from the viewpoint of effectiveness. Commercially available products include Leopearl ISK2 and Leopearl ISL2 (both manufactured by Chiba Flour Milling Co., Ltd.).

[0017] Component (C) may be used alone or in combination of two or more kinds. The blending amount of component (C) is in the range of 0.01 to 30 mass %, preferably 0.05 to 20 mass %, more preferably 0.1 to 5 mass %, based on the total amount of the whitening cosmetic composition of the present invention.

[0018] [Dimer acid ester] The dimer acid ester (D) used in the present invention may be an ester of dimer acid and alcohol, preferably an ester of dimer dilinoleic acid, more preferably an ester of dimer dilinoleic acid and dimer diol. The ester moiety of dimer acid or dimer dilinoleic acid preferably contains one or more moieties selected from behenyl, isostearyl, stearyl, cetyl, and phytosteryl, more preferably two or more moieties selected from behenyl, isostearyl, stearyl, cetyl, and phytosteryl. More specifically, examples of the dimer dilinoleate include bis(behenyl / isostearyl / phytosteryl) dimer dilinoleate, bis(phytosteryl / isostearyl / cetyl / stearyl / behenyl) dimer dilinoleate, phytosteryl / isostearyl / cetyl / stearyl / behenyl) dimer dilinoleate, di(isostearyl / phytosteryl) dimer dilinoleate, and dimer dilinoleyl diisostearate. Of these, phytosteryl / isostearyl / cetyl / stearyl / behenyl) dimer dilinoleate and di(isostearyl-phytosteryl) dimer dilinoleate are preferred, and phytosteryl / isostearyl / cetyl / stearyl / behenyl) dimer dilinoleate is more preferred.

[0019] Commercially available products include dimer dilinoleate (phytosteryl / isostearyl / cetyl / stearyl / behenyl) as "Plandool-S, -H", di(isostearyl / phytosteryl) dimer dilinoleate as "LUSPLAN PI-DA", dimer dilinoleyl dimer dilinoleate as "LUSPLAN DD-DA", dilinoleyl dimer dilinoleate (behenyl / isostearyl / phytosteryl) as "Plandool-G", and dimer dilinoleyl diisostearate as "LUSPLAN DD-IS" (all manufactured by Nippon Fine Chemicals).

[0020] Component (D) may be used alone or in combination of two or more kinds. The blending amount of component (D) is in the range of 0.0001 to 10 mass %, preferably 0.001 to 5 mass %, more preferably 0.005 to 5 mass %, based on the total amount of the whitening cosmetic composition of the present invention.

[0021] The whitening cosmetic composition of the present invention can be provided with a sunscreen effect by using an ultraviolet ray shielding agent in combination. As the ultraviolet ray shielding agent, one or more kinds selected from fine particle metal oxides and organic ultraviolet ray absorbing agents can be used. When an ultraviolet ray shielding agent is incorporated into the whitening cosmetic composition of the present invention, it is preferable to use fine particles of a metal oxide, since the incorporation of an organic ultraviolet ray absorbing agent can cause skin irritation and stickiness upon use.

[0022] In the present invention, fine particles refer to particles having an average particle size in the range of about 10 nm to 200 nm. The average particle size is a volume-based average particle size and can be measured by a laser diffraction / scattering type particle size distribution analyzer. Such metal oxides are not particularly limited as long as they are components normally used in cosmetics, etc., and include fine titanium oxide, fine zinc oxide, fine zirconium oxide, fine cerium oxide, etc. One or two types selected from fine titanium oxide and fine zinc oxide are preferred because of their excellent ultraviolet scattering effect, and fine zinc oxide is particularly preferred because of its excellent UVA blocking effect. The shape of the fine metal oxide particles is not particularly limited, and they may be hydrophilized or hydrophobized.

[0023] The fine titanium oxide particles can be used without any particular limitation as long as they are used in ordinary cosmetics. The shape of the fine titanium oxide particles is not particularly limited. In addition, the particle diameter of the fine titanium oxide particles is preferably, for example, an average particle diameter of the primary particles of 100 nm or less, further 80 nm or less. The lower limit of the average particle diameter of the fine titanium oxide particles is not particularly limited, but is usually about 30 nm. The fine titanium oxide particles can be produced by ordinary methods such as the sulfuric acid method and the chlorine method, and commercially available products can also be used. Examples of commercially available fine titanium oxide particles include SIV series, TTO-55 series, TTO-S series (all manufactured by Ishihara Sangyo Kaisha), MT-100TV, MT-500V, MT-01 (all manufactured by Teika Corporation), etc.

[0024] Titanium oxide microparticles can be used after being subjected to hydrophilic or hydrophobic treatment on the surface as required.Hydrophilic treatment means can be exemplified by surface treatment such as polyhydric alcohol treatment such as glycerin, hyaluronic acid treatment, etc.Furthermore, hydrophobic treatment means can be exemplified by surface treatment such as fluorine compound treatment, silicone treatment, alkyl treatment, alkylsilane treatment, metal soap treatment, water-soluble polymer treatment, amino acid treatment, N-acylamino acid treatment, lecithin treatment, organic titanate treatment, polyol treatment, acrylic resin treatment, methacrylic resin treatment, urethane resin treatment, fatty acid treatment, etc.

[0025] Although the fine particle titanium dioxide and / or its surface-treated fine particle titanium dioxide can be blended directly into cosmetics, it can be used as necessary after coating the surface of other powders such as plate-like powders such as talc, mica, and sericite, silica, and spherical powders. By coating plate-like powders or spherical powders with fine particle titanium dioxide, the aggregation of fine particle titanium dioxide is reduced, and a high ultraviolet protection effect is obtained. In addition, by coating plate-like powders or spherical powders with fine particle titanium dioxide, the rough feeling in use that is peculiar to fine particle titanium dioxide is reduced, and a cosmetic with a good feel in use can be obtained.

[0026] The fine particle titanium dioxide and / or surface-treated fine particle titanium dioxide can be blended directly in the form of powder into cosmetics, but it can also be used after being dispersed in advance in an oil such as silicone oil or hydrocarbon oil, or in an aqueous component.

[0027] The fine zinc oxide particles can be used without any particular limitation as long as they are used in ordinary cosmetics. The shape of the fine zinc oxide particles is not particularly limited. In addition, examples of commercially available fine zinc oxide particles include FINEX-25, FINEX-30, FINEX-50 (all manufactured by Sakai Chemical Industry Co., Ltd.), MZ-300, MZ-500 (all manufactured by Teika Co., Ltd.), etc.

[0028] The zinc oxide microparticles can be used after the surface is hydrophilized or hydrophobized as required. Examples of hydrophilization treatment include surface treatment such as polyhydric alcohol treatment such as glycerin, hyaluronic acid treatment, etc. Examples of hydrophobization treatment include surface treatment such as fluorine compound treatment, silicone treatment, alkyl treatment, alkylsilane treatment, metal soap treatment, water-soluble polymer treatment, amino acid treatment, N-acylamino acid treatment, lecithin treatment, organic titanate treatment, polyol treatment, acrylic resin treatment, methacrylic resin treatment, urethane resin treatment, fatty acid treatment, etc. Among them, fatty acid treatment is preferred, and isostearic acid treatment is particularly preferred.

[0029] The fine particle zinc oxide and / or its surface-treated fine particle zinc oxide can be blended directly into cosmetics, but if necessary, it can be used in the form of a coating on the surface of other powders such as talc, mica, sericite, etc., plate-like powders, silica, spherical powders, etc.

[0030] The fine particle zinc oxide and / or its surface-treated fine particle zinc oxide powder can be blended directly into cosmetics, but it can also be used after being dispersed in advance in an oil such as silicone oil or hydrocarbon oil, or in an aqueous component.

[0031] The above-mentioned fine particle metal oxides may be used alone or in combination of two or more kinds. The blending amount of the fine particle metal oxide in the present invention is preferably 0.1 to 30 mass% based on the total amount of the whitening cosmetic. When the fine particle metal oxide is 0.1 mass% or more, the ultraviolet ray shielding effect of the fine particle metal oxide can be expected to be more excellent. When the fine particle metal oxide is 30 mass% or less, the feeling of use can be more preferable.

[0032] The whitening cosmetic composition of the present invention preferably contains a component that imparts a soft focus effect. Examples of such components include aluminum hydroxide powder, crosslinked methylpolysiloxane powder, synthetic phlogopite, titanium oxide-coated mica, and spherical silica.

[0033] In addition to the above-mentioned components, the whitening cosmetic composition of the present invention may contain, as necessary, aqueous components, oily components, moisturizers, pigments, surfactants, thickeners, cosmetic ingredients, fragrances, polymeric substances, antibacterial and antifungal agents, alcohols, powders, biologically derived components, and the like that are usually contained in topical skin preparations.

[0034] The whitening cosmetic composition of the present invention can be used in the form of, for example, a lotion, emulsion, or ointment. Furthermore, the whitening cosmetic composition of the present invention can be produced by any method.

[0035] In view of the composition of the oily components, the whitening cosmetic composition of the present invention is preferably an oil-based cosmetic composition or a water-in-oil type emulsion cosmetic composition. EXAMPLES

[0036] The present invention will be described in detail below with reference to examples, but the scope of the present invention is not limited thereto. The blend amounts are in mass % unless otherwise specified.

[0037] First, the evaluation methods for the examples and comparative examples of the present invention will be described.

[0038] The prepared whitening cosmetic compositions according to the Examples and Comparative Examples were applied to the skin, and then subjected to a sensory evaluation by five expert sensory evaluators. Each sample of the Examples and Comparative Examples was evaluated by consensus on the skin compatibility, lack of squeaking, and lack of stickiness after application, using the following three-level scale. The results are shown in Table 1. [Good compatibility with skin, no squeaking, no stickiness] ○: Good △: Defective ×: Very bad

[0039] The prepared whitening cosmetic compositions according to the Examples and Comparative Examples were applied to black artificial leather at a concentration of 2 mg / cm. 2 After coating, the samples were visually evaluated by five expert sensory evaluators. The transparency of each sample of the Examples and Comparative Examples after coating was evaluated by consensus on the following three-level scale. The results are shown in Table 1. [Transparency] ○: High transparency △: Low transparency (white cast) ×: Very low transparency (very whitish)

[0040] The prepared whitening cosmetic compositions according to the Examples and Comparative Examples were stored in a thermostatic chamber at 50° C. for one month, after which the changes over time were visually evaluated. The results are shown in Table 1. [Stability] ○: No precipitation or separation observed △: Some precipitation or separation is observed. ×: Precipitation or separation is observed

[0041] [Table 1]

[0042] As shown in Table 1, in comparison with Comparative Examples 1 to 5, Examples 1 and 2 provided good results in all of the transparency of the applied surface, compatibility with the skin, non-squeakiness, non-stickiness, and stability.

[0043] [Example 3] Whitening cosmetic agent (mass%) PEG-9 Polydimethylsiloxyethyl Dimethicone (Note 1) 4.4 (Dimethicone / vinyl dimethicone) crosspolymer, dimethicone (Note 2) 1.0 Fine particle zinc oxide (hydrophobic surface treatment) 9.5 Fine particle titanium dioxide (hydrophobic surface treatment) 8.5 Dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / Stearyl / Behenyl) (Note 3) 0.5 Pentaerythrityl tetraethylhexanoate (Note 4) 3.0 Cyclopentasiloxane (Note 6) 23.55 Inulin stearate (note 7) 1.0 Spherical Silica 1.0 Sodium chloride 0.8 Phenoxyethanol 0.4 1,3-Butylene glycol 5.0 Glycerin 2.5 Arbutin 3.0 Trisodium citrate 0.15 Sodium chloride 0.2 Distilled water remaining

[0044] Example 3 gave good results in terms of transparency of the applied surface, compatibility with the skin, lack of squeaking, lack of stickiness, and stability.

[0045] [Example 4] Whitening cosmetic agent (mass%) PEG-9 Polydimethylsiloxyethyl Dimethicone (Note 1) 4.4 (Dimethicone / vinyl dimethicone) crosspolymer, dimethicone (Note 2) 1.0 Fine particle zinc oxide (hydrophobic surface treatment) 9.5 Fine particle titanium dioxide (hydrophobic surface treatment) 8.5 Dimer dilinoleic acid (phytosteryl / isostearyl / cetyl / Stearyl / Behenyl) (Note 3) 0.5 Pentaerythrityl tetraethylhexanoate (Note 4) 3.0 Cyclopentasiloxane (Note 6) 23.55 Inulin stearate (note 7) 1.0 Aluminum hydroxide 0.5 Crosslinked methylsiloxane powder 0.5 Sodium chloride 0.8 Phenoxyethanol 0.4 1,3-Butylene glycol 5.0 Glycerin 2.5 Niacinamide 6.0 Trisodium citrate 0.15 Sodium chloride 0.2 Distilled water remaining

[0046] Example 4 gave good results in terms of transparency of the applied surface, compatibility with the skin, lack of squeaking, lack of stickiness, and stability.

Claims

[Claim 1] Whitening cosmetics containing the following (A) to (D). (A) One or more selected from the group consisting of tranexamic acid, ascorbic acid derivatives, arbutin, and niacinamide. (B) Tetraester oil (C) Inulin fatty acid ester (D) Dimer acid ester