JP5495852B2 - Topical skin preparation - Google Patents
Topical skin preparation Download PDFInfo
- Publication number
- JP5495852B2 JP5495852B2 JP2010042010A JP2010042010A JP5495852B2 JP 5495852 B2 JP5495852 B2 JP 5495852B2 JP 2010042010 A JP2010042010 A JP 2010042010A JP 2010042010 A JP2010042010 A JP 2010042010A JP 5495852 B2 JP5495852 B2 JP 5495852B2
- Authority
- JP
- Japan
- Prior art keywords
- external preparation
- skin
- mass
- skin external
- component
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229940057910 shea butter Drugs 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 229940032094 squalane Drugs 0.000 description 1
- 229940031439 squalene Drugs 0.000 description 1
- TUHBEKDERLKLEC-UHFFFAOYSA-N squalene Natural products CC(=CCCC(=CCCC(=CCCC=C(/C)CCC=C(/C)CC=C(C)C)C)C)C TUHBEKDERLKLEC-UHFFFAOYSA-N 0.000 description 1
- 125000003696 stearoyl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 230000000475 sunscreen effect Effects 0.000 description 1
- 239000000516 sunscreening agent Substances 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 125000005063 tetradecenyl group Chemical group C(=CCCCCCCCCCCCC)* 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
Landscapes
- Medicinal Preparation (AREA)
- Cosmetics (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
Description
本発明は、両親媒性脂質を含有する皮膚外用剤に関する。 The present invention relates to a skin external preparation containing an amphiphilic lipid.
皮膚の最外層である角層は、外部からの物質の進入を抑制すると同時に、自身が水分を保持することにより皮膚の柔軟性やなめらかな外観を保つ機能を持っている。荒れ肌、乾燥肌、老化肌等においては、この角層の水分量が低下していることから、角層の水分を保持又は角層に水分を供給するための油剤や水溶性保湿成分を配合した化粧料が広く用いられている。一方、角層を構成する角質細胞の間隙には、角質細胞間脂質と呼ばれる両親媒性脂質が角質細胞のすきまを埋めるように存在しており、このような両親媒性脂質に着目した皮膚外用剤も、数多く報告され、広く使用されるに至っている(特許文献1〜3)。 The stratum corneum, which is the outermost layer of the skin, suppresses the entry of substances from the outside, and at the same time has a function of maintaining the softness and smooth appearance of the skin by retaining moisture. In rough skin, dry skin, aging skin, etc., the amount of moisture in this stratum corneum is reduced, so oils and water-soluble moisturizing ingredients were added to retain or supply moisture to the stratum corneum. Cosmetics are widely used. On the other hand, there are amphipathic lipids called keratin intercellular lipids that fill the gaps in the stratum corneum that make up the stratum corneum. Many agents have been reported and widely used (Patent Documents 1 to 3).
しかし、広く用いられている角質細胞間脂質やその類似体等の両親媒性物質は、室温で固体であることから、皮膚外用剤に安定に配合することは非常に難しい。そこで近年では安定配合に関する検討も成されている(特許文献4、5)。 However, widely used amphiphiles such as keratin intercellular lipids and analogs thereof are solid at room temperature, and thus it is very difficult to stably mix them with external preparations for skin. Therefore, in recent years, studies on stable blending have been made (Patent Documents 4 and 5).
一概に安定配合といってもそれを妨げる原因には色々あり、従来、両親媒性脂質が三次元構造を作りやすいため、高温において経時的に流動性がなくなったり指どれが悪くなる等、両親媒性脂質の析出や流動性の低下が、安定配合を妨げる原因として報告されていた。
本発明者は、今般、両親媒性脂質含有の皮膚外用剤を高温保存条件下で長期間保存すると油層や水層の分離が起きてしまうという問題があることを見出した。
In general, there are various reasons for obstructing the stable formulation, but since the amphiphilic lipid has been easy to form a three-dimensional structure in the past, it has become difficult for parents to lose fluidity over time or have their fingers worse. The precipitation of fluid lipids and the decrease in fluidity have been reported as the cause of hindering stable blending.
The present inventor has now found that there is a problem that separation of an oil layer or an aqueous layer occurs when an external preparation containing amphiphilic lipids is stored for a long period of time under high temperature storage conditions.
従って、本発明の課題は、高温保存条件下でも長期間油層や水層の分離が抑制され、かつ使用感の良好な皮膚外用剤を提供することにある。 Accordingly, an object of the present invention is to provide an external preparation for skin, in which separation of an oil layer and an aqueous layer is suppressed for a long period of time even under high temperature storage conditions and the feeling of use is good.
そこで、本発明者は、かかる課題を解決すべく鋭意検討したところ、両親媒性脂質であるアミド誘導体と非イオン性界面活性剤と長鎖アシルアルキルタウリン塩とを併用し、これにシア脂を一定量配合することにより顕著に高温での油層や水層の分離が抑制され、かつ使用感の良好な皮膚外用剤が得られることを見出した。 Therefore, the present inventors diligently studied to solve such problems, and as a result, an amide derivative that is an amphiphilic lipid, a nonionic surfactant, and a long-chain acylalkyltaurine salt are used in combination, and shea fat is added thereto. It has been found that by adding a certain amount, an external preparation for skin can be obtained, in which separation of an oil layer and an aqueous layer at a high temperature is remarkably suppressed and the feeling of use is good.
すなわち、本発明は、次の成分(A)、(B)、(C)、(D)及び(E)
(A)次の一般式(1)で表わされるアミド誘導体、
That is, the present invention includes the following components (A), (B), (C), (D) and (E)
(A) an amide derivative represented by the following general formula (1):
(式中、R1は炭素数10〜26の直鎖若しくは分岐鎖の飽和若しくは不飽和の炭化水素基、R2は炭素数9〜25の直鎖若しくは分岐鎖の飽和若しくは不飽和の炭化水素基を示し、Xは基−(CH2)n−、−(CH2CH2O)m−CH2CH2−又は−CH2CH(OH)−CH2−から選ばれる基を示す。但しn及びmは2〜6の数を示す)
(B)非イオン性界面活性剤、
(C)N−長鎖アシルアルキルタウリン塩、
(D)シア脂、
(E)水性媒体
を含有し、成分(B)及び(C)と成分(D)との含有質量比(D)/{(B)+(C)}が0.5〜2.0である皮膚外用剤を提供するものである。
(In the formula, R 1 represents a straight chain or a saturated or unsaturated hydrocarbon group branched, R 2 is a hydrocarbon, saturated or unsaturated linear or branched 9 to 25 carbon atoms 10 to 26 carbon atoms X represents a group selected from the group — (CH 2 ) n —, — (CH 2 CH 2 O) m —CH 2 CH 2 — or —CH 2 CH (OH) —CH 2 —. n and m represent a number of 2 to 6)
(B) a nonionic surfactant,
(C) N-long chain acylalkyltaurine salt,
(D) Shea fat,
(E) It contains an aqueous medium, and the mass ratio (D) / {(B) + (C)} of components (B) and (C) to component (D) is 0.5 to 2.0. An external preparation for skin is provided.
本発明の皮膚外用剤は、高温で保存しても油層や水層の分離が抑制され、かつ肌へのなじみ感が良く、べたつかず、使用感も良好である。 The external preparation for skin of the present invention can suppress separation of the oil layer and aqueous layer even when stored at a high temperature, has a good feeling on the skin, is not sticky, and has a good feeling of use.
本発明に用いられる一般式(1)で表されるアミド誘導体は、両親媒性物質であり、角質層の水分保持能力を改善する作用を有するものである。 The amide derivative represented by the general formula (1) used in the present invention is an amphiphilic substance and has an action of improving the moisture retention ability of the stratum corneum.
一般式(1)中、R1で示される炭化水素基は炭素数10〜26のものであるが、就中炭素数14〜18のものが好ましく、また、R2で示される炭化水素基は炭素数9〜25のものであるが、就中炭素数14〜18のものが好ましい。また、これらの炭化水素基としては、直鎖又は分岐鎖のアルキル基又はアルケニル基が好ましい。斯かる炭化水素基の具体例としては、デシル、ドデシル、テトラデシル、ヘキサデシル、オクタデシル、エイコシル、ドコシル、デセニル、ドデセニル、テトラデセニル、ヘキサデセニル、オクタデセニル、エイコセニル、ドコセニル、デカジエニル、ドデカジエニル、テトラデカジエニル、ヘキサデカジエニル、オクタデカジエニル、エイコサジエニル、ドコサジエニル、テトラコサジエニル、ヘキサコサジエニル、2−ヘキシルデシル、2−オクチルウンデシル、2−デシルテトラデシル基等が挙げられる。 In the general formula (1), the hydrocarbon group represented by R 1 has 10 to 26 carbon atoms, preferably 14 to 18 carbon atoms, and the hydrocarbon group represented by R 2 is preferably Among them, those having 9 to 25 carbon atoms are preferred, especially those having 14 to 18 carbon atoms. Moreover, as these hydrocarbon groups, a linear or branched alkyl group or alkenyl group is preferable. Specific examples of such hydrocarbon groups include decyl, dodecyl, tetradecyl, hexadecyl, octadecyl, eicosyl, docosyl, decenyl, dodecenyl, tetradecenyl, hexadecenyl, octadecenyl, eicosenyl, dococenyl, decadienyl, dodecadienyl, tetradecadienyl, hexadecadienyl Examples include dienyl, octadecadienyl, eicosadienyl, docosadienyl, tetracosadienyl, hexacosadienyl, 2-hexyldecyl, 2-octylundecyl, 2-decyltetradecyl group and the like.
一般式(1)中、Xとしては、−(CH2)n−、−CH2CH(OH)CH2−が好ましい。またn及びmは2〜4が好ましく、特に2が好ましい。 In general formula (1), X is preferably — (CH 2 ) n — or —CH 2 CH (OH) CH 2 —. N and m are preferably 2 to 4, and 2 is particularly preferable.
これらの(A)成分のアミド誘導体は単独で、又は二種以上を組み合わせて用いることができ、(A)成分の本発明皮膚外用剤中の含有量は、スキンケア効果及び分離抑制の点から0.1〜10質量%が好ましく、さらに0.5〜5質量%であることが好ましく、特に3〜4質量%であることが好ましい。 These amide derivatives of component (A) can be used singly or in combination of two or more. The content of component (A) in the external preparation for skin of the present invention is 0 from the viewpoint of skin care effect and suppression of separation. 0.1 to 10% by mass is preferable, 0.5 to 5% by mass is more preferable, and 3 to 4% by mass is particularly preferable.
本発明に用いられる(B)非イオン性界面活性剤としては、ポリオキシエチレンアルキルエーテル、ポリオキシエチレン硬化ヒマシ油、ポリオキシエチレンソルビタン脂肪酸エステル、ソルビタン脂肪酸エステル、ポリエチレングリコール脂肪酸エステル、ポリオキシエチレンソルビット脂肪酸エステル、ポリグリセリン脂肪酸エステル、アルキルグリセリンエーテル、グリセリン脂肪酸エステル、ポリオキシエチレンコレステリルエーテル、アルキルポリグルコシド、ショ糖脂肪酸エステル、アミンオキシド等が挙げられる。これらの非イオン性界面活性剤中のアルキル基及び脂肪酸の炭素数は8〜20が好ましい。特に、ポリオキシエチレンソルビタン脂肪酸エステル、ソルビタン脂肪酸エステル等のソルビタンエステル系非イオン性界面活性剤が分離抑制の点で好ましい。これらは単独で、又は2種以上を組み合わせて使用することでき、本発明皮膚外用剤中に、0.05〜30質量%含有するのが分離抑制及び使用感の点から好ましく、特に2〜5質量%含有するのが好ましい。 Examples of the nonionic surfactant (B) used in the present invention include polyoxyethylene alkyl ether, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan fatty acid ester, sorbitan fatty acid ester, polyethylene glycol fatty acid ester, polyoxyethylene sorbit Examples include fatty acid esters, polyglycerin fatty acid esters, alkyl glycerin ethers, glycerin fatty acid esters, polyoxyethylene cholesteryl ethers, alkyl polyglucosides, sucrose fatty acid esters, and amine oxides. As for the carbon number of the alkyl group and fatty acid in these nonionic surfactants, 8-20 are preferable. In particular, sorbitan ester-based nonionic surfactants such as polyoxyethylene sorbitan fatty acid ester and sorbitan fatty acid ester are preferable from the viewpoint of suppression of separation. These can be used singly or in combination of two or more. In the external preparation for skin of the present invention, it is preferably contained in an amount of 0.05 to 30% by mass from the viewpoint of suppression of separation and feeling of use, particularly 2 to 5%. It is preferable to contain by mass.
本発明に用いられる(C)N−長鎖アシルアルキルタウリン塩としては、次の一般式(2) The (C) N-long chain acylalkyltaurine salt used in the present invention is represented by the following general formula (2).
(式中、R3は炭素数7〜19のアルキル基、アルケニル基又はヒドロキシアルキル基を示し、R4は炭素数1〜3のアルキル基を示し、Mはアルカリ金属又は有機アミンを示す)で表される化合物が挙げられる。 (Wherein R 3 represents an alkyl group having 7 to 19 carbon atoms, an alkenyl group or a hydroxyalkyl group, R 4 represents an alkyl group having 1 to 3 carbon atoms, and M represents an alkali metal or an organic amine). And the compounds represented.
一般式(2)中、R3CO−で示されるアシル基の具体例としては、ラウロイル、パルミトイル、ステアロイル、オレオイル、ヤシ油脂肪酸由来のココイル基(R3の炭素数が11〜19の間に分布しているアルカノイル基)等が挙げられる。R4で示されるアルキル基の具体例としては、メチル、エチル、プロピル基等が挙げられる。さらに対イオンMの具体例としては、リチウム、カリウム、ナトリウム、トリエタノールアミン、ジエタノールアミン、モノエタノールアミン等が挙げられる。 In the general formula (2), specific examples of the acyl group represented by R 3 CO— are cocoyl groups derived from lauroyl, palmitoyl, stearoyl, oleoyl, coconut oil fatty acid (the carbon number of R 3 is between 11 and 19). Alkanoyl group distributed in the above). Specific examples of the alkyl group represented by R 4 include methyl, ethyl, propyl group and the like. Furthermore, specific examples of the counter ion M include lithium, potassium, sodium, triethanolamine, diethanolamine, monoethanolamine and the like.
一般式(2)中、R3で示される炭化水素基は炭素数7〜19のものであるが、就中炭素数14〜18のものが分離抑制及び使用感の点から好ましい。これらの(C)成分のN−長鎖アシルアルキルタウリン塩は単独で、又は二種以上を組み合わせて用いることができ、その本発明皮膚外用剤中の含有量は、分離抑制及び使用感の点から0.01〜5質量%が好ましく、特に0.1〜2質量%が好ましい。 In the general formula (2), the hydrocarbon group represented by R 3 is one having 7 to 19 carbon atoms, and especially one having 14 to 18 carbon atoms is preferable from the viewpoint of suppression of separation and feeling of use. These N-long chain acylalkyltaurine salts of component (C) can be used alone or in combination of two or more, and the content in the external preparation for skin of the present invention is the point of separation suppression and feeling of use. 0.01 to 5 mass% is preferable, and 0.1 to 2 mass% is particularly preferable.
本発明に用いられる(D)シア脂はシアの木の実由来の脂肪で、シアバターとも称されている。当該シア脂としては、例えば、Cropure SB(クローダジャパン株式会社製)の商品名で市販されているものを使用することができる。シア脂は、分離抑制及び使用感の点から、本発明皮膚外用剤中に2〜6質量%とするのが好ましく、さらに3〜5質量%含有するのが好ましく、特に4〜4.5質量%含有するのが好ましい。 The (D) shea fat used in the present invention is fat derived from shea nuts and is also called shea butter. As the said shea fat, what is marketed by the brand name of Cropure SB (made by Croda Japan Co., Ltd.) can be used, for example. The shea fat is preferably 2 to 6% by mass, more preferably 3 to 5% by mass, particularly 4 to 4.5% by mass in the skin external preparation of the present invention from the viewpoint of separation suppression and usability. % Content is preferable.
本発明の皮膚外用剤は、成分(B)及び(C)と成分(D)との含有質量比(D)/{(B)+(C)}が、0.5〜2であることが、分離抑制及び使用感の点で重要である。当該含有比がこの範囲内であると分離抑制や使用感において十分な効果が発揮される。より好ましい含有質量比(D)/{(B)+(C)}は、0.6〜1.9であり、特に好ましくは0.7〜1.8である。
さらに、成分(D)と成分(A)との含有質量比(D)/(A)が、0.5〜1.8、特に0.7〜1.5であると分離抑制や使用感が好ましいものとなる。
In the external preparation for skin of the present invention, the mass ratio (D) / {(B) + (C)} of the components (B) and (C) and the component (D) is 0.5 to 2. It is important in terms of separation suppression and usability. When the content ratio is within this range, a sufficient effect is exhibited in suppressing separation and feeling in use. The more preferable content ratio (D) / {(B) + (C)} is 0.6 to 1.9, particularly preferably 0.7 to 1.8.
Furthermore, when the content mass ratio (D) / (A) of the component (D) to the component (A) is 0.5 to 1.8, particularly 0.7 to 1.5, separation suppression and usability are obtained. This is preferable.
本発明皮膚外用剤に用いられる(E)水性媒体としては、水及び水溶性有機溶媒が挙げられ、具体的には、水、エタノール、グリセリン、ソルビトール、プロピレングリコール、ジイソプロピレングリコール、1,3−ブタンジオール等の水、水溶性アルコール、ポリオール及びこれらの1種又は2種以上の組み合わせが挙げられる。
当該(E)水性媒体の本発明皮膚外用剤中の含有量は、分離抑制及び使用感等の点から50〜90質量%が好ましく、さらに55〜80質量%が好ましい。
Examples of the aqueous medium (E) used in the skin external preparation of the present invention include water and water-soluble organic solvents. Specifically, water, ethanol, glycerin, sorbitol, propylene glycol, diisopropylene glycol, 1, 3 -Water such as butanediol, water-soluble alcohols, polyols, and one or a combination of two or more thereof.
The content of the aqueous medium (E) in the external preparation for skin of the present invention is preferably 50 to 90% by mass, more preferably 55 to 80% by mass, from the viewpoint of separation suppression and feeling of use.
本発明皮膚外用剤には、前記成分の他に、(D)成分以外の油性物質、粉体、他の保湿剤、紫外線吸収剤、pH調整剤、防腐剤、増粘剤、色素、香料等を含有させることができる。 In addition to the above components, the skin external preparation of the present invention includes oily substances other than the component (D), powder, other moisturizers, ultraviolet absorbers, pH adjusters, preservatives, thickeners, pigments, fragrances, and the like Can be contained.
(D)成分以外の油性物質としては、通常化粧料に使用されている一般化粧料油剤を用いることができる。これらの油剤は特に限定されないが、ジメチルポリシロキサン、ジメチルシクロポリシロキサン、メチルフェニルポリシロキサン、メチルハイドロジェンポリシロキサン、オクタメチルシクロテトラシロキサン、オクタメチルシクロペンタシロキサン、デカメチルシクロペンタシロキサン等のシリコーン油;アボカド油、ツバキ油、マカデミアナッツ油、オリーブ油、ホホバ油等の植物油;オレイン酸、イソステアリン酸等の脂肪酸;ベヘニルアルコール、オクタデシルアルコール、ヘキサデシルアルコール、オレイルアルコール等の高級アルコール類;2−エチルヘキサン酸セチル、パルミチン酸−2−エチルヘキシル、ミリスチン酸−2−オクチルドデシル、ジ−2−エチルヘキサン酸ネオペンチルグリコール、トリ−2−エチルヘキサン酸グリセロール、オレイン酸−2−オクチルドデシル、ミリスチン酸イソプロピル、トリイソステアリン酸グリセロール、トリ−2−エチルヘキサン酸グリセロール、オレイン酸−2−オクチルドデシル、ミリスチン酸イソプロピル、トリイソステアリン酸グリセロール、2−エチルヘキサン酸ジグリセリド、ジ−パラメトキシケイヒ酸−モノ−2−エチルヘキサン酸グリセリル等のエステル類;流動イソパラフィン、コレステロール、ワセリン、スクワレン、スクワラン等の炭化水素油等が挙げられ、特に油性感、べたつき感を軽減する場合には、揮発性のジメチルポリシロキサン、ジメチルシクロポリシロキサン等のシリコーン油を好ましいものとして例示することができる。この場合、皮膚外用剤におけるシリコーン油の好ましい含有量は1〜10質量%である。また、ベヘニルアルコール等の高級アルコール類を1〜5質量%、流動イソパラフィン、コレステロール等の炭化水素油を1〜10質量%含有させることも、分離抑制及び使用感の点で好ましい。 As the oily substance other than the component (D), a general cosmetic oil usually used in cosmetics can be used. These oil agents are not particularly limited, but silicone oils such as dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, octamethylcyclotetrasiloxane, octamethylcyclopentasiloxane, decamethylcyclopentasiloxane, etc. Vegetable oils such as avocado oil, camellia oil, macadamia nut oil, olive oil and jojoba oil; fatty acids such as oleic acid and isostearic acid; higher alcohols such as behenyl alcohol, octadecyl alcohol, hexadecyl alcohol and oleyl alcohol; cetyl 2-ethylhexanoate , 2-ethylhexyl palmitate, 2-octyldodecyl myristate, neopentyl glycol di-2-ethylhexanoate, tri-2-ethylhexa Glyceric acid, oleic acid-2-octyldodecyl, isopropyl myristate, glycerol triisostearate, glycerol tri-2-ethylhexanoate, -2-octyldodecyl oleate, isopropyl myristate, glycerol triisostearate, 2-ethylhexane Esters such as acid diglyceride, di-paramethoxycinnamic acid-glyceryl mono-2-ethylhexanoate; hydrocarbon oils such as liquid isoparaffin, cholesterol, petrolatum, squalene, squalane, etc. In the case of reduction, silicone oils such as volatile dimethylpolysiloxane and dimethylcyclopolysiloxane can be exemplified as preferable examples. In this case, the preferable content of the silicone oil in the external preparation for skin is 1 to 10% by mass. Moreover, it is also preferable from the point of isolation | separation suppression and a usability | use_condition to contain 1-5 mass% of higher alcohols, such as behenyl alcohol, and 1-10 mass% of hydrocarbon oils, such as a liquid isoparaffin and cholesterol.
これらの他の油性物質は単独で、又は二種以上を組み合わせて用いることができ、その本発明皮膚外用剤中の含有量は1〜30質量%、特に5〜20質量%であることが好ましい。またこれらの他の油性物質は、(D)成分に対して、質量比で0.2〜10、特に1.0〜3.0含有することがより使用感の面から好ましい。 These other oily substances can be used alone or in combination of two or more, and the content in the skin external preparation of the present invention is preferably 1 to 30% by mass, particularly preferably 5 to 20% by mass. . Moreover, it is more preferable from the surface of a usability | use_condition that these other oily substances contain 0.2-10 by mass ratio with respect to (D) component, especially 1.0-3.0.
なお、本発明では、皮膚外用剤で一般的に用いられている増粘剤の含有量が少なくても分離抑制が達成される。増粘剤とは、(メタ)アクリル酸・(メタ)アクリル酸アルキル共重合体やアクリル酸アルキル重合体、アクリル酸アルキル及び/又はメタクリル酸アルキルの1種以上のモノマーとポリオキシエチレンアルキルエーテルとの共重合体であるアクリル酸アルキル・メタクリル酸アルキル・ポリオキシエチレンステアリルエーテル共重合体等が挙げられ、中でも、アクリル酸共重合体等が挙げられる。これら増粘剤の本発明皮膚外用剤中の含有量は、0.05質量%以下であっても良く、さらに0.01質量%以下であっても良く、特に増粘剤を実質的に含まなくても良い。 In addition, in this invention, even if there is little content of the thickener generally used with the skin external preparation, isolation | separation suppression is achieved. Thickeners include (meth) acrylic acid / alkyl (meth) acrylate copolymers, alkyl acrylate polymers, alkyl acrylates and / or alkyl methacrylate monomers and polyoxyethylene alkyl ethers. Examples thereof include alkyl acrylates, alkyl methacrylates, polyoxyethylene stearyl ether copolymers, and the like, and among them, acrylic acid copolymers and the like. The content of these thickeners in the external preparation for skin of the present invention may be 0.05% by mass or less, more preferably 0.01% by mass or less, and particularly substantially contains the thickener. It is not necessary.
本発明の皮膚外用剤の形態は、水中油型乳化物であるのが好ましく、クリーム、ファンデーション、乳液、日焼け止めとするのが好ましい。本発明皮膚外用剤のpHは、健常の肌により近く肌にやさしい点から弱酸性が好ましく、特にpH4〜6が好ましい。本発明の皮膚外用剤で、このようなpH値を達成するために、好ましいpH調整剤の組み合わせとしては、コハク酸、クエン酸、クエン酸Na、グリコール酸、酒石酸、アスコルビン酸、グルタミン酸等の有機酸を含有する酸を好ましくは0.01〜0.20質量%、特に好ましくは0.05〜0.15質量%含有させることが良い。さらに好ましくは、上記酸に加え、水酸化ナトリウム、水酸化カリウム、トリエタノールアミン、アルギニン等のアルカリ剤を好ましくは0.001〜0.02質量%、特に好ましくは0.005〜0.015質量%併用することが良い。 The form of the external preparation for skin of the present invention is preferably an oil-in-water emulsion, and preferably a cream, foundation, emulsion, or sunscreen. The pH of the external preparation for skin of the present invention is preferably weakly acidic from the viewpoint of being close to healthy skin and friendly to the skin, and particularly preferably pH 4-6. In order to achieve such a pH value in the external preparation for skin of the present invention, preferable combinations of pH adjusters include organic compounds such as succinic acid, citric acid, sodium citrate, glycolic acid, tartaric acid, ascorbic acid, and glutamic acid. The acid containing acid is preferably contained in an amount of 0.01 to 0.20% by mass, particularly preferably 0.05 to 0.15% by mass. More preferably, in addition to the above acid, an alkali agent such as sodium hydroxide, potassium hydroxide, triethanolamine, arginine is preferably 0.001 to 0.02% by mass, particularly preferably 0.005 to 0.015% by mass. It is good to use together.
本発明の皮膚外用剤は、例えば、次のようにして製造される。成分(A)、(B)、(D)及び(D)以外の油性物質を含有する油相成分を(高温80〜90℃で)溶解し、これに別途同程度の温度に加熱した成分(C)、(E)を含有する水相成分を加え撹拌し、(室温20〜30℃まで)徐冷することにより、微細な脂質分散乳化物である本発明の皮膚化粧料が得られる。 The external preparation for skin of the present invention is produced, for example, as follows. Ingredients (A), (B), (D) and oil phase components containing oily substances other than (D) are dissolved (at a high temperature of 80 to 90 ° C.) and separately heated to the same temperature ( The skin cosmetic of the present invention which is a fine lipid-dispersed emulsion can be obtained by adding an aqueous phase component containing C) and (E), stirring, and gradually cooling (to room temperature of 20 to 30 ° C.).
次に実施例を挙げて本発明を詳細に説明する。 EXAMPLES Next, an Example is given and this invention is demonstrated in detail.
実施例1〜4及び比較例1〜6
(調製方法)
1.油相成分を80℃に加熱溶解する。
2.水相成分を80℃に加熱溶解する。
3.攪拌している油相に水相を加え、ホモミキサーで処理し、室温まで除冷することで乳化物を得る。
Examples 1-4 and Comparative Examples 1-6
(Preparation method)
1. The oil phase component is dissolved by heating at 80 ° C.
2. The aqueous phase component is dissolved by heating at 80 ° C.
3. An aqueous phase is added to the stirring oil phase, the mixture is treated with a homomixer, and cooled to room temperature to obtain an emulsion.
(安定性評価方法)
上記製造法で得られた乳化物をガラスびんに入れて50℃で1ヶ月保存した。これを室温にもどし外観を観察し下記基準で評価した。
○:分離現象のない均一な乳化物
×:分離現象あり
(Stability evaluation method)
The emulsion obtained by the above production method was placed in a glass bottle and stored at 50 ° C. for 1 month. This was returned to room temperature and the appearance was observed and evaluated according to the following criteria.
○: Uniform emulsion without separation phenomenon ×: There is separation phenomenon
(試験方法)
専門パネリスト10名が、調製したクリームを実際に使用し、実用評価を行った。評価項目は、肌になじむ感じ、塗布後のべたつきの2項目であり、下記基準により評価した。
(評価基準)
◎:8名以上が良好と感じた。
○:6名以上が良好と感じた。
△:4名以下が良好と感じた。
×:2名以下が良好と感じた。
(Test method)
Ten professional panelists actually used the prepared cream and evaluated it for practical use. The evaluation items were two items, a feeling of conforming to the skin and stickiness after application, and evaluation was performed according to the following criteria.
(Evaluation criteria)
A: Eight or more people felt good.
○: Six or more people felt good.
Δ: Fewer than 4 people felt good.
X: 2 or less felt good.
表1及び表2から明らかなように、アミド誘導体(1)に、非イオン性界面活性剤及びN−長鎖アシルアルキルタウリン塩を配合した皮膚外用剤に、シア脂を一定量配合することにより分離が抑制され、かつ使用感の良好な皮膚外用剤が得られた。 As is apparent from Tables 1 and 2, by adding a certain amount of shea fat to an external preparation for skin containing a nonionic surfactant and an N-long chain acylalkyltaurine salt in the amide derivative (1). A skin external preparation having a good feeling in use while being separated was obtained.
Claims (6)
(A)次の一般式(1)で表わされるアミド誘導体、
(B)非イオン性界面活性剤、
(C)N−長鎖アシルアルキルタウリン塩、
(D)シア脂、
(E)水性媒体
を含有し、成分(B)及び(C)と成分(D)との含有質量比(D)/{(B)+(C)}が0.5〜2.0である皮膚外用剤。 The following components (A), (B), (C), (D) and (E):
(A) an amide derivative represented by the following general formula (1):
(B) a nonionic surfactant,
(C) N-long chain acylalkyltaurine salt,
(D) Shea fat,
(E) It contains an aqueous medium, and the mass ratio (D) / {(B) + (C)} of components (B) and (C) to component (D) is 0.5 to 2.0. Skin external preparation.
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