Cosmetic comprising niacinamide

Abstract

To provide a cosmetic which contains niacinamide and a sodium acrylate / sodium acryloyldimethyl taurate copolymer, and offers superior feel upon application.SOLUTION: A cosmetic of the present invention comprises (A) niacinamide, (B) a sodium acrylate / sodium acryloyldimethyl taurate copolymer, (C) a carbomer, and (D) porous spherical silica having an oil absorption of 70 ml / 100 g or more.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention relates to a cosmetic containing niacinamide, which has a rich taste and a fresh feeling of use, and has no sticky feeling during application.

Background Art

[0002] Niacinamide (also known as nicotinamide) is one of the vitamin B group, which is a water-soluble vitamin. It has high safety and is known as an effective ingredient for improving keratin, whitening effect and anti-wrinkle effect. According to the demand for whitening and anti-aging, it is widely used in cosmetics. However, when an effective amount of niacinamide is blended in a cosmetic, a fresh feeling of use may be lost, stickiness may occur at the application site, and especially in an emulsion-type cosmetic, a sticky feeling may occur during application, resulting in poor skin affinity.

[0003] Therefore, technologies for improving the feel of use of cosmetics containing niacinamide have been proposed. For example, in Patent Document 1, an anionic surfactant having a sulfonic acid group in the molecule is added to a cosmetic containing niacinamide and a hydrophobically modified polyether urethane, so that there is freshness during application, and stickiness on the skin to which the cosmetic is applied is suppressed. Also, in Patent Document 2, in an emulsified cosmetic containing niacinamide, one or more water-soluble polymers selected from acryloyldimethyltaurine salt-containing copolymer, sclerotium gum, alkali-producing polysaccharide, carboxymethyl dextran sodium and xanthan gum and an ester oil having an IOB value of 0.15 to 0.35 are blended, whereby the elongation of the cosmetic during application and the skin affinity (absence of a sticky feeling) are excellent, and a fresh feeling of use can be obtained.

[0004] On the one hand, the (sodium acrylate / sodium acryloyldimethyltaurate) copolymer is known as a hydrophilic thickener that can impart a kokuminess (a residual feeling after the cosmetic adheres well to the skin, as if the cosmetic covers the skin) to cosmetics, and is often used in cosmetics that require a rich texture. However, it has a heavy spreading property during application and tends to lack freshness.

[0005] In cosmetics containing niacinamide, when the (sodium acrylate / sodium acryloyldimethyltaurate) copolymer is used to impart a kokuminess, there has been a problem in improving the feel of use of the niacinamide-containing cosmetics without losing the unique feel of use of the hydrophilic thickener.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0007] An object of the present invention is to provide a cosmetic excellent in feel of use in a cosmetic containing niacinamide and a (sodium acrylate / sodium acryloyldimethyltaurate) copolymer.

Means for Solving the Problems

[0008] As a result of intensive studies to solve the above problems, the present inventor has found that by combining a carbomer, which is a hydrophilic thickener, with a specific porous spherical silica, the stickiness during application caused by niacinamide can be suppressed without impairing the kokuminess (the after-feeling that the cosmetic covers the skin after the cosmetic has adapted to the skin) obtained when using a (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, and a fresh feeling of use can be obtained, thus completing the present invention.

[0009] That is, the present invention provides (A) Niacinamide, (B) A (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, (C) Carbomer, and (D) Porous spherical silica having an oil absorption amount of 70 ml / 100 g or more and provides a cosmetic containing the same.

Effects of the Invention

[0010] By having the above configuration, the cosmetic according to the present invention can achieve a fresh feeling of use, no stickiness during application, and a feeling of use with kokuminess in a cosmetic containing niacinamide.

Modes for Carrying Out the Invention

[0011] The cosmetic of the present invention is characterized by containing (A) niacinamide, (B) a (sodium acrylate / sodium acryloyldimethyltaurate) copolymer, (C) carbomer, and (D) porous spherical silica. Hereinafter, each component constituting the cosmetic of the present invention will be described in detail.

[0012] <(A) Niacinamide> (A) Niacinamide of the present invention (hereinafter, may be simply referred to as “component (A)”) is an amide compound of nicotinic acid (also referred to as vitamin B3 or niacin). Niacinamide is a water-soluble vitamin and is a substance widely known as one of the vitamin B groups, and can be obtained by extracting from natural products such as rice bran or synthesizing by a known method.

[0013] The blending amount of component (A) in the cosmetic of the present invention is not particularly limited as long as it is an amount that exhibits the effectiveness of niacinamide. However, it is preferably 3% by mass or more, more preferably 4% by mass or more, based on the total amount of the cosmetic. Examples of the blending amount range include 3 to 10% by mass, 4 to 8% by mass, etc. If blended within the above range, an effect can be obtained in terms of improving wrinkles and sagging and preventing rough skin based on the horny layer improving effect, whitening effect, and anti-wrinkle action of niacinamide.

[0014] <(B) (Sodium acrylate / sodium acryloyldimethyltaurate) copolymer> (B) (Sodium acrylate / sodium acryloyldimethyltaurate) copolymer of the present invention (hereinafter, may be simply referred to as “component (B)”) is a copolymer of sodium acrylate and sodium acryloyldimethyltaurate, and is a microgel-based thickener that swells in water and forms a hydrated gel phase.

[0015] Commercially available products can be used as component (B) of the present invention. Examples of commercially available products of component (B) include SIMULGEL EG ((sodium acrylate / sodium acryloyldimethyltaurate) copolymer 37.5%, isododecane 22.5%, polysorbate 80 7.5%, sorbitan oleate 2.5%, water 30% mixture, manufactured by Seppic), etc.

[0016] The blending amount of component (B) in the cosmetic of the present invention is not particularly limited as long as it is an amount usually blended to thicken the aqueous phase according to the dosage form of the cosmetic. Examples of the lower limit value of the blending amount with respect to the total amount of the cosmetic include 0.1% by mass, 0.2% by mass, 0.3% by mass, etc., and examples of the upper limit value include 5% by mass, 3% by mass, 2% by mass, 1% by mass, etc. Therefore, examples of the blending amount range include 0.1 to 5% by mass, 0.2 to 3% by mass, etc.

[0017] <(C) Carbomer> The (C) carbomer of the present invention (also referred to as carboxyvinyl polymer, hereinafter may be simply referred to as “component (C)”) is an acrylic acid-based water-soluble polymer having acrylic acid as the main chain and crosslinked with pentaerythrityl allyl ether, sucrose allyl ether or propylene allyl ether, and has a carboxyl group. The (C) carbomer of the present invention refers to those generally used in cosmetics as thickeners for solvents such as water and alcohol.

[0018] Commercially available products can be used as component (C) of the present invention. Examples of commercially available products of component (C) include Acpec HV-501E, HV-505E, HV-505ED, HV-801EG, HV-801EG-300, HV-805EG, HV-805EG-300 and SW-705E (manufactured by Sumitomo Seika Chemicals Co., Ltd.), Hibis Wako 103, Hibis Wako 104 and Hibis Wako 105 (manufactured by Fujifilm Wako Pure Chemical Corporation), Carbopol (registered trademark) 934 polymer, 940 polymer, 941 polymer, 980 polymer, 981 polymer, 2984 polymer, 5984 polymer, ETD2050 polymer, Silk100 polymer, Style2.0 polymer, Ultrez10 polymer and Ultrez30 polymer (manufactured by Lubrizol Corporation), etc.

[0019] The blending amount of component (C) in the cosmetic of the present invention is not particularly limited as long as it is an amount usually blended to thicken the aqueous phase according to the dosage form of the cosmetic. However, as the lower limit value of the blending amount relative to the total amount of the cosmetic, for example, 0.05% by mass, 0.08% by mass, 0.1% by mass, etc. can be mentioned, and as the upper limit value, 1% by mass, 0.8% by mass, 0.5% by mass, 0.3% by mass, etc. can be mentioned. Therefore, as the blending amount range, 0.05 - 1% by mass, 0.08 - 0.8% by mass, etc. can be mentioned.

[0020] In the cosmetic of the present invention, the blending ratio (B / C) of the (B) (sodium acrylate / sodium acryloyldimethyltaurine) copolymer to the (C) carbomer is preferably 2.0 - 5.0 in terms of mass ratio, and more preferably 2.5 - 4.0.

[0021] <(D) Porous spherical silica> The (D) porous spherical silica of the present invention (hereinafter, may be simply referred to as “component (D)”) is a porous silica having an oil absorption amount measured according to JIS K5101 - 13 - 2 (boiled linseed oil method) of 70 ml / 100 g or more, preferably 100 ml / 100 g or more. The shape of this porous silica is spherical, and it is particularly preferably a true sphere. Here, “true sphere” means that it shows a substantially circular shape when projected from any direction, and the minimum value of the particle diameter is 80% or more, more preferably 90% or more of the maximum value. The average particle diameter of the (D) porous spherical silica is not particularly limited, but is preferably 1 - 15 μm, and more preferably 2 - 10 μm. As the component (D) of the present invention, it is preferably spherical silica having a hydrophilic surface.

[0022] Commercially available products can be used as the component (D) of the present invention. Examples of commercially available products of the component (D) include God Ball E - 6C, God Ball B - 6C (both manufactured by Suzuki Oil & Fat Co., Ltd.), Sansphere L - 31, Sansphere L - 51 (both manufactured by AGC Si-Tech Co., Ltd.), etc.

[0023] The blending amount of component (D) in the cosmetic of the present invention is preferably 0.3 to 3% by mass, more preferably 0.4 to 2.5% by mass, and even more preferably 0.5 to 2% by mass based on the total amount of the cosmetic. If the blending amount is less than 0.3% by mass, the suppression of the sticky feeling during application may not be sufficient, and if it exceeds 3% by mass, the richness tends to decrease.

[0024] When preparing the cosmetic according to the present invention as an emulsified cosmetic, a surfactant may be blended in addition to the components (A) to (D). The surfactant is not particularly limited, and a lipophilic or hydrophilic surfactant is appropriately selected according to the desired emulsified cosmetic such as oil-in-water type or water-in-oil type. As the lipophilic surfactant, it is preferable to use a nonionic surfactant having an HLB of less than 7, and as the hydrophilic surfactant, it is preferable to use a nonionic surfactant having an HLB of 7 or more. Examples of nonionic surfactants having an HLB of less than 7 include glycerin fatty acid esters such as glyceryl monoisostearate, glyceryl sesquisostearate, glyceryl monooleate, glyceryl dioleate, glyceryl sesquioleate; polyglycerin fatty acid esters such as polyglyceryl-2 diisostearate, polyglyceryl triisostearate, decaglyceryl pentaisostearate, decaglyceryl pentaoleate, diglyceryl monoisostearate, diglyceryl diisostearate, diglyceryl dioleate; sorbitan fatty acid esters such as sorbitan monooleate, sorbitan monostearate, sorbitan tristearate, sorbitan trioleate, sorbitan isostearate, sorbitan sesquisostearate, sorbitan sesquioleate, etc. Examples of nonionic surfactants with an HLB of 7 or more include polyoxyethylene hydrogenated castor oil such as PEG-10 hydrogenated castor oil; polyoxyethylene polyhydric alcohol fatty acid esters such as glyceryl PEG-3 monoisostearate and glyceryl PEG-8 monoisostearate; polyglycerol fatty acid esters such as polyglyceryl diisostearate; polyoxyethylene sorbitan fatty acid esters such as POE(20) sorbitan monooleate (cosmetic ingredient display name: polysorbate 80) and POE(20) sorbitan monostearate (cosmetic ingredient display name: polysorbate 60); polyoxyethylene sterol ethers such as PEG-30 phytosterol, etc. In the cosmetic of the present invention, one or more selected from the above surfactants can be used.

[0025] Since the surfactant is a selectively blended component in the cosmetic of the present invention, it does not necessarily have to be blended. However, when blended, it is necessary to be in a preferable blending amount from the viewpoint of emulsion stability. Examples include 0.01 to 5% by mass, 0.1 to 3% by mass, 0.3 to 2% by mass, etc. based on the total amount of the cosmetic.

[0026] When preparing the cosmetic of the present invention as an oil-in-water type emulsion cosmetic, among the surfactants, it is preferable to blend the above nonionic surfactant with an HLB of 7 or more.

[0027] The cosmetic of the present invention is not particularly limited in form, such as aqueous cosmetics, oil-in-water or water-in-oil type emulsion cosmetics, oil-based cosmetics, etc. However, since the component (B) of the present invention has excellent emulsifying properties, it is suitable for the form of emulsion cosmetics, particularly the form of oil-in-water type emulsion cosmetics.

[0028] In addition to the above components, the cosmetic according to the present invention may optionally contain other optional components that are commonly used in external skin preparations such as cosmetics and pharmaceuticals, as long as the object and effects of the present invention are not impaired. Examples of other optional components include, for example, oil, water, hydrophilic thickeners other than the components (B) and (C), humectants, lower alcohols, lipophilic thickeners, ultraviolet absorbers, ultraviolet scattering agents, powder components, dispersants, chelating agents, pH adjusters (neutralizing agents), antioxidants, fragrances, preservatives, bactericides, various drugs, and the like. However, it is not limited to these examples.

[0029] As the oil component, silicone oils such as linear silicone oils like dimethicone, diphenylsiloxyphenyltrimethicone, hydrogen dimethicone, dodecamethylpentasiloxane, decamethyltetrasiloxane, etc., and cyclic silicone oils like decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, octamethylcyclotetrasiloxane, etc.; hydrocarbon oils such as liquid paraffin, isohexadecane, isododecane, undecane, tridecane, ozokerite, squalane, squalene, pristane, paraffin, isoparaffin, ceresin, petrolatum, microcrystalline wax, hydrogenated polyisobutene, olefin oligomer, hydrogenated polydecene, etc.; ester oils such as pentaerythrityl tetraethylhexanoate, cetyl ethylhexanoate, di(phytosteryl / octyldodecyl) lauroylglutamate, triisostearin, glyceryl diisostearate, triethylhexanoin, (phytosteryl / behenyl) dimer dilinoleate, (phytosteryl / isostearyl / cetyl / stearyl / behenyl) dimer dilinoleate, isopropyl palmitate, phytosteryl macadamia nut fatty acid, pentaerythrityl tetra(behenate / benzoate / ethylhexanoate), ethylhexyl palmitate, myristyl myristate, isopropyl myristate, tripropylene glycol dipivalate, diisopropyl sebacate, isodecyl neopentanoate, etc.; linear alcohols such as lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetostearyl alcohol, etc.; higher alcohols with 12 to 22 carbon atoms such as monostearyl glycerin ether (batyl alcohol), 2-decyltetradecynol, lanolin alcohol, cholesterol, phytosterol, hexyl dodecanol, isostearyl alcohol, octyl dodecanol, etc., which are branched-chain alcohols;Examples of oils and fats include castor oil, cocoa butter, avocado oil, camellia oil, macadamia nut oil, corn oil, olive oil, rapeseed oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, camellia seed oil, kaya oil, rice bran oil, sinagiri oil, Japanese cedar oil, jojoba oil, germ oil, triglyceride, glyceryl trioctanoate, glyceryl triisopalmitate, and the like.;

[0030] As water, ion-exchanged water, purified water, tap water, natural water, etc. are selected as necessary. The blending amount is the remaining amount (mass% based on the total amount of the cosmetic) with respect to the sum of the essential components according to the present invention and other optional blending components.

[0031] Examples of the hydrophilic thickener other than the components (B) and (C) include plant-based polymers such as gum arabic, tragacanth, galactan, carob gum, guar gum, karaya gum, carrageenan, xanthan gum, pectin, agar, quince seed (marmelo), algal colloid (kelp extract), glycyrrhizic acid; microbial-based polymers such as xanthan gum, dextran, succinoglucan, pullulan; animal-based polymers such as collagen, casein, albumin, gelatin; starch-based polymers such as starch (rice, corn, potato, wheat), carboxymethyl starch, methylhydroxypropyl starch; cellulose-based polymers such as methylcellulose, nitrocellulose, ethylcellulose, methylhydroxypropyl cellulose, hydroxyethyl cellulose, sodium cellulose sulfate, hydroxypropyl cellulose, sodium carboxymethyl cellulose (CMC), hydrophobically modified alkyl cellulose, crystalline cellulose, cellulose powder; alginic acid-based polymers such as sodium alginate, propylene glycol alginate; vinyl-based polymers such as polyvinyl alcohol, polyvinyl methyl ether, polyvinyl pyrrolidone; polyoxyethylene-based polymers; polyoxyethylene polyoxypropylene copolymer-based polymers; acrylic-based polymers such as polyacrylic acid and its salts, polyethyl acrylate, polyacrylamide; inorganic water-soluble polymers such as polyethyleneimine, cationic polymer, bentonite, magnesium aluminum silicate, laponite, hectorite, silicic anhydride; taurate-based polymers such as (dimethylacrylamide / acryloyldimethyltaurine sodium) cross-polymer, (acryloyldimethyltaurine ammonium / vinylpyrrolidone) copolymer, (acryloyldimethyltaurine ammonium / behenyl methacrylate-25) cross-polymer; hydrophobically modified polyether urethane such as PEG-240 / decyltetradeceth-20 / hexamethylene diisocyanate copolymer; acrylate-based polymers such as acrylates / acrylic acid alkyl (C10-30) cross-polymer, acrylates / stearyl methacrylate-20 copolymer, etc.

[0032] Since the hydrophilic thickener is an optional ingredient in the cosmetics of the present invention, it does not necessarily have to be formulated. However, when formulating, it is preferably formulated to such an extent that the effect of the formulation is recognized and within the limit where no adverse effects such as excessive formulation amount impairing the usability are recognized. A suitable formulation amount is preferably about 0.01 to 1% by mass based on the total amount of the cosmetics.

[0033] Examples of the humectant include polyoxyalkylene-polyoxyethylene copolymer dialkyl ether, 1,3-butylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, hexylene glycol, glycerin, diglycerin, xylitol, maltitol, maltose, D-mannitol and the like.

[0034] Examples of the lower alcohol include ethanol, isopropyl alcohol and the like.

[0035] The method for producing the cosmetics of the present invention is not particularly limited and can be produced according to a conventional method according to the intended dosage form.

[0036] The cosmetics of the present invention can be made into dosage forms such as emulsion, gel, paste, cream, balm and the like. Among them, it is suitable for making cream cosmetics filled in wide-mouth containers or tubes.

[0037] The cosmetics according to the present invention can be widely applied in the forms of pharmaceuticals, quasi-drugs (such as ointments), and basic cosmetics such as facial cleansers, lotions, emulsions, creams, gels, essences (beauty liquids), packs, masks, etc.; makeup cosmetics such as foundations, lipsticks, etc.; sun care products such as sunscreen; fragrance cosmetics; body cosmetics, etc. However, in view of the use feeling when applied to the skin, the effects based on niacinamide, etc., it is particularly suitable for providing as skin cosmetics.

Examples

[0038] Examples are given below to describe the present invention in further detail, but the present invention is not limited thereto in any way. Unless otherwise specified, the blending amount is expressed as mass% with respect to the system in which the component is blended. Before specifically explaining each example, the evaluation method adopted will be described.

[0039] 1. Practical use test For each 0.2 g of the sample of each example, it was applied to the skin of a professional panelist in a circular motion with the finger of the panelist, and the feeling during application (moisture, stickiness) and the firmness after application were scored by the following four-level evaluation, and the average value was calculated for evaluation. Those with an average score of 1.5 or more were set as the passing line. (Evaluation criteria) 3 points: Very good 2 points: Good 1 point: Slightly bad 0 point: Bad

[0040] A cream-type water-in-oil emulsion cosmetic having the composition shown in Table 1 below was prepared. Specifically, it was prepared by adding an aqueous component mixture (aqueous phase) separately obtained by mixing and dissolving to an oily component mixture (oil phase) obtained by mixing while heating the oily components, and emulsifying with a homomixer or the like. For the prepared samples, each characteristic was evaluated according to the above-described evaluation method. The results are shown together in a table.

[0041]

Table 1

[0042] As shown in Table 1, the cosmetic of Comparative Example 1 containing (A) niacinamide and (B) (sodium acrylate / sodium acryloyldimethyltaurate) copolymer of the present invention but not containing (C) carbomer had a cocoon-like feeling, but did not have a fresh feeling of use, stickiness occurred during application, and a poor skin affinity was felt. Further, the cosmetic of Comparative Example 2 containing (A) niacinamide, (B) (sodium acrylate / sodium acryloyldimethyltaurate) copolymer and (C) carbomer of the present invention but not containing (D) porous spherical silica had a fresh feeling of use, but the cocoon-like feeling decreased, stickiness occurred during application, and a poor skin affinity was felt. On the other hand, in the cosmetics of Examples 1 to 4 containing the components (A) to (D) of the present invention, there was a fresh feeling of use, no stickiness during application, good skin affinity was felt, and the cocoon-like feeling after application was excellent. Also in the cosmetics of Examples 5 and 6 in which the blending amounts of (B) and (C) of the present invention were changed, there was a fresh feeling of use, no stickiness during application, good skin affinity was felt, and the cocoon-like feeling after application was excellent.

[0043] Similar to Table 1, a cream-type water-in-oil emulsion cosmetic having the composition listed in Table 2 was prepared. Table 2 shows examples using spherical silica with different oil absorption amounts.

Table 2

[0044] As shown in Table 2, in the cosmetics of Comparative Examples 3 to 6 using spherical silica with an oil absorption amount of less than 70 ml / 100 g, a fresh feeling of use could not be obtained, the cocoon-like feeling also decreased, and the feeling of stickiness during application could not be suppressed. Further, in the cosmetic of Comparative Example 7 in which the blending amount of spherical silica with an oil absorption amount of less than 70 ml / 100 g was increased, the cocoon-like feeling decreased, and the feeling of stickiness during application could not be sufficiently suppressed. On the other hand, in the cosmetics of Example 1 and Example 7 using spherical silica with an oil absorption amount of 70 ml / 100 g or more, a fresh feeling of use was obtained, and while having a cocoon-like feeling, the feeling of stickiness during application could be sufficiently suppressed.

Claims

Claim 1 (A) Niacinamide, (B) (Sodium acrylate / sodium acryloyldimethyltaurate) copolymer, (C) Carbomer, and (D) Porous spherical silica having an oil absorption of 70 ml / 100 g or more A cosmetic comprising the same. Claim 2 The cosmetic according to Claim 1, wherein the blending amount of the component (A) is 3% by mass or more based on the total amount of the cosmetic. Claim 3 The cosmetic according to Claim 1, wherein the blending ratio (B / C) of the component (B) to the component (C) is 2.0 to 5.0 in terms of mass ratio. Claim 4 The cosmetic according to Claim 1, wherein the blending amount of the component (D) is 0.3 to 3% by mass based on the total amount of the cosmetic. Claim 5 The cosmetic according to Claim 1, which is an oil-in-water type emulsified cosmetic.

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