JP2004107227A - Skin cosmetic - Google Patents

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Publication number
JP2004107227A
JP2004107227A JP2002269234A JP2002269234A JP2004107227A JP 2004107227 A JP2004107227 A JP 2004107227A JP 2002269234 A JP2002269234 A JP 2002269234A JP 2002269234 A JP2002269234 A JP 2002269234A JP 2004107227 A JP2004107227 A JP 2004107227A
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Japan
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group
carbon atoms
oil
component
skin
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JP2002269234A
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JP3779661B2 (en
Inventor
Yuri Kato
加藤 有里
Joji Okada
岡田 譲二
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Kao Corp
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Kao Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To prepare a highly safe skin cosmetic having excellent humectant properties and a good feeling of use and preservation stability without skin irritation. <P>SOLUTION: This skin cosmetic comprises the following ingredients (A), (B) and (C). (A) An amphiphilic polymer, (B) one or two or more kinds of compounds selected from ceramides and ceramide analog compounds and (C) an oil which is a pasty form at 25°C and/or a polar oil that is a liquid at 25°C. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、保湿性に優れ、使用感、及び保存安定性が良好で、皮膚刺激性がなく安全性に優れた皮膚化粧料に関する。
【0002】
【従来の技術】
皮膚角質層に存在する細胞間脂質の主成分であるセラミドは、皮膚のバリア機能や保湿機能を担う生体物質であることが知られている。しかしながら、セラミドは結晶性が高く、一般的な化粧品基剤に対する溶解性が乏しいために化粧料に配合することが困難である。
【0003】
化粧料にセラミドやセラミド類似化合物を安定配合する試みとしては、特許文献1に非イオン性界面活性剤及びイオン性界面活性剤を配合することが開示されている。しかしながら多量又は複数の界面活性剤を配合すると、化粧料の保存安定性が悪くなる傾向があり、さらに使用感や皮膚刺激性の面で不充分である。
【0004】
また、特許文献2には、セラミドやセラミド類似化合物等の角質細胞間脂質成分と特定のジアミド化合物を組み合わせることで、角質層のバリア機能及び水分保持機能をより本質的に改善、補強できることが開示されているが、化粧料の安定性や使用感の点で充分とはいえない。
【特許文献1】
特開平6−345633号公報
【特許文献2】
特開2002−114666号公報
【0005】
【発明が解決しようとする課題】
本発明の目的は、保湿性に優れ、保存安定性が良好で、皮膚刺激性がなく使用感に優れた皮膚化粧料を提供することにある。
【0006】
【課題を解決するための手段】
発明者らは、保湿性に優れるが結晶性が高いために化粧料に配合することが困難なセラミド類に、両親媒性高分子、及び特定の油剤を配合することで、上記課題を解決できることを見出した。
【0007】
すなわち、本発明は、次の(A)成分、(B)成分、及び(C)成分:
(A)両親媒性高分子、
(B)セラミド及びセラミド類似化合物から選択される一種又は二種以上の化合物、及び
(C)25℃でペースト状の油剤及び/又は25℃で液体の極性油剤、
を含有する皮膚化粧料を提供するものである。
【0008】
【発明の実施の形態】
本明細書中において、(メタ)アクリルは、アクリル及びメタクリルを表す。
【0009】
本発明に係る皮膚化粧料は、必須成分として次の(A)成分、(B)成分、及び(C)成分:
(A)両親媒性高分子、
(B)セラミド及びセラミド類似化合物から選択される一種又は二種以上の化合物、及び
(C)25℃でペースト状の油剤及び/又は25℃で液体の極性油剤、を含有する。
【0010】
本発明に係る皮膚化粧料は、セラミド及びセラミド類似化合物(以下、セラミド類、と示す)(B)に、両親媒性高分子(A)、及び特定の油剤(C)を組み合わせて配合するため、セラミド類が性能を発揮するのに充分な量を安定的に溶解させることができ、保湿性に優れた化粧料である。また、本発明に係る皮膚化粧料は、従来セラミド類(B)を化粧料に配合するために必須とされていた界面活性剤を少量のみ使用するだけで又は全く使用しなくても、セラミド類(B)を均一且つ安定に配合した化粧料を調製することができ、従って、皮膚刺激性がなく使用感に優れた化粧料である。さらに、本発明に係る皮膚化粧料は、セラミド類(B)と、両親媒性高分子(A)及び特定の油剤(C)とを組み合わせて配合するため、両親媒性高分子(A)のみを使用する際のしっとり感に欠けるデメリット、及び特定の油剤(C)のみを使用する際の油性感のデメリットを互いに打ち消しあい、使用感が良好となり、且つ保存安定性も良好となる。
【0011】
本発明において、(A)成分である両親媒性高分子は、疎水性官能基と親水性官能基を有する高分子で、水性媒体及び油性媒体の両者に親和性を有するものである。両親媒性高分子(A)としては、水性媒体及び油性媒体の両者に親和性を有し、且つ、増粘性及び乳化性がある高分子であれば、特に制限されることなく用いることができる。疎水性官能基としては、炭素数8〜40の直鎖又は分岐鎖の飽和又は不飽和の炭化水素基であることが好ましく、親水性官能基としては、カルボキシル基、スルホン基、リン酸基、第3級アミノ基、第4級アンモニウム基等のイオン性官能基であることが好ましい。
【0012】
両親媒性高分子(A)としては、例えば、アクリル酸アルキル共重合体;(メタ)アクリル酸/(メタ)アクリル酸アルキル共重合体;アクリル酸、メタクリル酸、アクリル酸アルキル、又はメタクリル酸アルキルの少なくとも1種以上のモノマーとポリオキシエチレンステアリルエーテルとメタクリル酸のエステルの共重合体;水溶性セルロース誘導体第4級アンモニウムエーテル;及び多糖誘導体等が挙げられる。尚、本発明の目的を達成できる限り、共重合体には他の単量体を含有していても良い。
【0013】
具体的には、アクリル酸アルキル共重合体としては、アキュリン33(ISP社)等が市販されている。(メタ)アクリル酸/(メタ)アクリル酸アルキル共重合体としては、カーボポール1382、ペムレンTR−1、ペムレンTR−2(以上、Noveon INC.)等が市販されている。アクリル酸、メタクリル酸、アクリル酸アルキル、又はメタクリル酸アルキルの少なくとも1種以上のモノマーとポリオキシエチレンステアリルエーテルとメタクリル酸のエステルの共重合体としては、粧配規(1998年版)に記載の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(20)ステアリルエーテル共重合体等が挙げられ、また、市販品としてはアキュリン22(ISP社)等が挙げられる。水溶性セルロース誘導体第4級アンモニウムエーテルとしては、ヒドロキシエチルセルロース塩化ヒドロキシプロピルラウリルジメチルアンモニウムエーテルが挙げられ、クオータリーソフトLM−200(ユニオンカーバイド社)等が市販されている。多糖誘導体としては、特開平9−235301、特開平10−292001号公報記載の方法により製造した多糖誘導体が含まれ、例えば、ヒドロキシエチルセルロースヒドロキシプロピルステアリルエーテルヒドロキシプロピルスルホン酸ナトリウム等が好ましい。
【0014】
中でも、乳化分散性、保存安定性の点から、アクリル酸、メタクリル酸、アクリル酸アルキル、又はメタクリル酸アルキルの少なくとも1種以上のモノマーとポリオキシエチレンステアリルエーテルとメタクリル酸のエステルの共重合体、及び/又は水溶性セルロース誘導体第4級アンモニウムエーテルを用いることが好ましく、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(20)ステアリルエーテル共重合体、及び/又はヒドロキシエチルセルロースヒドロキシプロピルステアリルエーテルヒドロキシプロピルスルホン酸ナトリウムを用いることが更に好ましい。
【0015】
両親媒性高分子(A)は、単独又は2種以上を組み合わせて用いても良い。
【0016】
皮膚化粧料中における両親媒性高分子(A)の含有量は、剤型等により異なり特に制限されないが、全組成中に0.01〜10重量%であることが好ましく、使用性の良好な粘度となる点から0.1〜5重量%であることが特に好ましい。
【0017】
本発明において(B)成分として用いられるセラミド及びセラミド類似化合物から選択される一種又は二種以上の化合物は、優れた保湿性を与える成分である。
【0018】
セラミドとしては、動植物から抽出、精製されたもの、微生物学的方法又は科学的方法によって合成されたものが含まれる。例えば、次の一般式(2)で表されるアミド誘導体が挙げられる。
【0019】
【化2】

Figure 2004107227
【0020】
(式中、Rは、1つ以上の水酸基が置換していてもよい、炭素数8〜50の直鎖又は分岐鎖の飽和又は不飽和の炭化水素基、或いはR−COO−R−で表される基であり、Rは炭素数8〜30の直鎖又は分岐鎖の飽和又は不飽和の炭化水素基、Rは1つ以上の水酸基が置換していてもよい炭素数8〜40の直鎖又は分岐鎖の飽和又は不飽和の炭化水素基を示し、
は、1つ以上の水酸基が置換していてもよい、炭素数8〜50の直鎖又は分岐鎖の飽和又は不飽和の炭化水素基を示す。)
具体的には、Robson K.J. et al., J. Lipid Res.,35,2060(1994)や、WertzP.W. et al., J. Lipid Res.,24,759(1983)等に記載されているタイプI〜VIIのセラミドが含まれる。市販されているセラミドとしては、セラミドIII、セラミドIIIB、セラミドIIIA、セラミドIV、フィトセラミドI(以上、デグサ社)、セラミドII(セダーマ社)、セラミドTIC−001(高砂香料社)等が挙げられる。
【0021】
一方、セラミド類似化合物としては、例えば特開昭62−228048号公報記載の次の式(3)で表わされるアミド誘導体が挙げられる。
【0022】
【化3】
Figure 2004107227
【0023】
(式中、Rは炭素数9〜25の直鎖又は分岐鎖の飽和又は不飽和の炭化水素基を示し、Rは炭素数10〜26の直鎖又は分岐鎖の飽和又は不飽和の炭化水素基を示す)
式(3)で表されるアミド誘導体は、特開昭62−228048号公報、特開昭63−228048号公報等に記載された方法で製造することができ、また、ソフケアセラミドSL−E(花王)等が市販されている。
【0024】
(B)成分としては、式(2)及び/又は式(3)で表されるアミド誘導体を用いることが、保湿性の効果の点から好ましく、またこれらのうち2種以上の化合物を用いることが好ましい。
【0025】
セラミド類(B)の皮膚化粧料中における含有量は、剤型等により異なり特に制限されないが、全組成中に0.00001〜10重量%であることが好ましく、保湿性の効果の点から0.0001〜5重量%であることが更に好ましい。
【0026】
(C)成分である油剤は、25℃でペースト状の油剤(C−1)及び25℃で液体の極性油剤(C−2)を含み、これらの中から選ばれる少なくとも1種が用いられる。
【0027】
25℃でペースト状の油剤(C−1)とは、25℃より高い温度に融点を有し、25℃で完全に固化しない半固体状態の油剤であって、液体油、固体脂とは区別される油剤であり、公定書(粧原基等)で軟こう様、ワセリン様等と示されるものをいう。
【0028】
25℃でペースト状の油剤は水溶性でも水に難溶性でも良い。例えば、ラノリン、トリラノリン脂肪酸グリセリル、軟質ラノリン脂肪酸、ワセリン、分岐又はヒドロキシル化した脂肪酸コレステリル、ジペンタエリトリット脂肪酸エステル(ヘキサオキシステアリン酸ジペンタエリトリット等)等が挙げられる。中でも、使用感が良好で、保湿性に優れ、且つ、保存安定性が良好になる点から、ワセリン、分岐又はヒドロキシル化した脂肪酸コレステリル、ジペンタエリトリット脂肪酸エステルを用いることが好ましく、ワセリン、イソステアリン酸コレステリル、ヒドロキシステアリン酸コレステリルを用いることが更に好ましい。
【0029】
25℃で液体の極性油剤(C−2)とは、25℃で液体で分子内に電気双極子を有する油剤をいう。25℃で液体の極性油剤(C−2)としては、化粧品、医薬品等に用いられるものであれば特に限定されず用いることができ、例えば合成又は天然のエステル油を挙げることができる。
【0030】
合成エステル油としては、具体的には、オクタン酸セチル、ミリスチン酸オクチルドデシル、パルミチン酸イソプロピル、パルミチン酸オクチル、ステアリン酸オクチル、オレイン酸デシル、ジカプリン酸ネオペンチルグリコール、リンゴ酸ジイソステアリル、アジピン酸ジイソブチル、N−ラウロイル−L−グルタミン酸ジ(フィトステリル・2−オクチルドデシル)、モノイソステアリン酸ポリグリセリル、ジイソステアリン酸ポリグリセリル、トリイソステアリン酸ポリグリセリル、テトライソステアリン酸ポリグリセリル、ジ−2−エチルヘキサン酸ネオペンチルグリコール、ミリスチン酸イソプロピル、ミリスチン酸イソドデシル、2−エチルヘキサン酸セチル、トリ−2−エチルヘキサン酸グリセリン、ミリスチン酸イソステアリル、セスキオレイン酸ソルビタン、乳酸オクチルドデシル、モノイソステアリン酸モノミリスチン酸グリセリル、イソノナン酸イソトリデシル等が例示される。
【0031】
天然のエステル油としては、アボガド油、ツバキ油、マカデミアナッツ油、トウモロコシ油、オリーブ油、ナタネ油、卵黄油、ゴマ油、パーシック油、小麦胚芽油、サザンカ油、ヒマシ油、アマニ油、サフラワー油、綿実油、大豆油、落花生油、茶実油、カヤ油、コメヌカ油、シナギリ油、ホホバ油、胚芽油、等が例示される。
【0032】
中でも、25℃で液体の極性油剤(C−2)としては、(B)成分との相容性の点から、モノイソステアリン酸ポリグリセリル、ジイソステアリン酸ポリグリセリル、トリイソステアリン酸ポリグリセリル、テトライソステアリン酸ポリグリセリル、ジ−2−エチルヘキサン酸ネオペンチルグリコール、ミリスチン酸イソステアリル、セスキオレイン酸ソルビタン、リンゴ酸ジイソステアリル、乳酸オクチルドデシル、ジカプリン酸ネオペンチルグリコール、モノイソステアリン酸モノミリスチン酸グリセリル、イソノナン酸イソトリデシル、ミリスチン酸イソプロピル、オクタン酸セチル、オレイン酸デシル、テトラ−2−エチルヘキサン酸ペンタエリトリトール、及び、オリーブ油が好ましく用いられ、ジイソステアリン酸ポリグリセリル、ミリスチン酸イソプロピル、オクタン酸セチル、オレイン酸デシルが更に好ましく用いられ、ジイソステアリン酸ポリグリセリルが特に好ましく用いられる。
【0033】
皮膚化粧料中における25℃でペースト状の油剤及び/又は25℃で液体の極性油剤(C)の含有量は、剤型等により適宜調整され、特に制限されないが、全組成中に0.1〜20重量%であることが好ましく、使用感が良好となる点から0.3〜10重量%であることが更に好ましい。
【0034】
(C)成分としては、ペースト状油剤(C−1)と液状極性油剤(C−2)を併用することが好ましい。(C−2)成分としてジイソステアリン酸ポリグリセリル、及び(C−1)成分としてワセリン又はイソステアリルコレステリルエステルを併用することが好ましい。
【0035】
また、25℃でペースト状の油剤(C−1)と25℃で液体の極性油剤(C−2)を併用する場合には、C−1とC−2の各々が全組成中に0.1〜10重量%含有することが更に好ましく、使用感が良好となる点からC−1とC−2の各々が全組成中に0.3〜10重量%含有することが特に好ましい。また、C−1とC−2の重量比は、10:90〜90:10であることが好ましく、20:80〜50:50であることが更に好ましい。
【0036】
本発明に係る皮膚化粧料には、更に(D)次の一般式(1)
【0037】
【化4】
Figure 2004107227
【0038】
(式中、Rは、水酸基及び/又はアルコキシ基が置換していてもよい、炭素数1〜22の直鎖又は分岐鎖の炭化水素基を示し、Rは、炭素数1〜12の直鎖又は分岐鎖の二価の炭化水素基を示し、Rは、炭素数1〜42の直鎖又は分岐鎖の二価の炭化水素基を示す。)
で表わされるジアミド化合物を含有することが好ましい。ジアミド化合物(D)は、皮膚自体のバリア効果及び保湿効果を高めるセラミドに似た特性を示すセラミド機能様脂質化合物であり、(B)と組み合わせることで角質層のバリア機能及び水分保持機能の維持及び補強効果が高まる点から好ましい。
【0039】
成分(D)の一般式(1)で表わされるジアミド化合物のRは、水酸基及び炭素数1〜6のアルコキシ基から選ばれる1〜3個が置換していてもよい炭素数1〜22の直鎖又は分岐鎖のアルキル基が好ましく、水酸基とアルコキシ基が同時に置換していてもよい。また、炭素数1〜18のアルキル基、炭素数1〜18のモノ又はジ−ヒドロキシアルキル基、炭素数1〜6のアルコキシが置換した炭素数1〜18のアルキル基及びヒドロキシと炭素数1〜6のアルコキシが置換した炭素数1〜18のアルキル基が好ましい。さらには、炭素数1〜18のアルキル基、炭素数2〜12のモノ−又はジ−ヒドロキシアルキル基、炭素数1〜6のアルコキシが置換した炭素数2〜12のアルキル基、ヒドロキシと炭素数1〜6のアルコキシが置換した炭素数2〜12のアルキル基がより好ましい。具体的にはメチル基、エチル基、プロピル基、ブチル基、ヘキシル基、ドデシル基、2−メチルプロピル基、2−エチルヘキシル基、メチル分岐イソステアリル基、2−ヒドロキシエチル基、9−ヒドロキシノニル基、2,3−ジヒドロキシプロピル基、2−メトキシエチル基、2−ヒドロキシ−3−メトキシプロピル基、9−メトキシノニル基等が挙げられる。このうち、2−ヒドロキシエチル基、メチル基、ドデシル基、2−メトキシエチル基がより好ましい。
【0040】
は、炭素数1〜12の直鎖又は分岐鎖のアルキレン基、さらには炭素数2〜6の直鎖又は分岐鎖のアルキレン基が好ましい。具体的にはエチレン基、トリメチレン基、テトラメチレン基、ペンタメチレン基、ヘキサメチレン基、メチルメチレン基(エチリデン基)、1−メチルエチレン基、2−メチルエチレン基、1−メチルトリメチレン基、2−メチルトリメチレン基、1,1−ジメチルエチレン基、2−エチルトリメチレン基等が挙げられる。このうちエチレン基及びトリメチレン基がより好ましい。
【0041】
一般式(1)において、Rは、炭素数2〜34の直鎖又は分岐鎖の二価炭化水素基が好ましく、さらには炭素数2〜34の直鎖又は分岐鎖のアルキレン基又は1〜4個の二重結合を有するアルケニレン基が好ましく、特に炭素数2〜24の直鎖又は分岐鎖のアルキレン基又は1〜4個の二重結合を有するアルケニレン基が好ましい。具体例としては、エチレン基、トリメチレン基、テトラメチレン基、ヘキサメチレン基、ヘプタメチレン基、オクタメチレン基、デカメチレン基、ウンデカメチレン基、ドデカメチレン基、トリデカメチレン基、テトラデカメチレン基、ヘキサデカメチレン基、オクタデカメチレン基、トリコサメチレン基、ヘキサコサメチレン基、トリアコンタメチレン基、1−メチルエチレン基、2−エチルトリメチレン基、1−メチルヘプタメチレン基、2−メチルヘプタメチレン基、1−ブチルヘキサメチレン基、2−メチル−5−エチルヘプタメチレン基、2,3,6−トリメチルヘプタメチレン基、6−エチルデカメチレン基、7−メチルテトラデカメチレン基、7−エチルヘキサデカメチレン基、7,12−ジメチルオクタデカメチレン基、8,11−ジメチルオクタデカメチレン基、7,10−ジメチル−7−エチルヘキサデカメチレン基、1−オクタデシルエチレン基、9,10−ジオクチルオクタデカメチレン基、8,9−ジノニルヘキサデカメチレン基、エテニレン基、1−オクタデセニルエチレン基、7,11−オクタデカジエニレン基、7−エテニル−9−ヘキサデカメチレン基、7,12−ジメチル−7,11−オクタデカジエニレン基、8,11−ジメチル−7,11−オクタデカジエニレン基、9,10−ジオクチル−7,11−オクタデカジエニレン基、8,9−ジノニル−6,10−ヘキサデカジエニレン基等が挙げられる。このうち、7,12−ジメチルオクタデカメチレン基、7,12−ジメチル−7,11−オクタデカジエニレン基、オクタデカメチレン基、オクタメチレン基、デカメチレン基、ウンデカメチレン基、トリデカメチレン基がより好ましい。
【0042】
ジアミド化合物において、好ましい化合物は、一般式(1)中のR、R及びRがそれぞれ上記のより好ましい範囲の基を組合せた化合物である。本発明の外用剤組成物に用いるジアミド化合物において、特に好ましいのは、以下の化合物である。
【0043】
【化5】
Figure 2004107227
【0044】
【化6】
Figure 2004107227
【0045】
成分(D)のジアミド化合物は、例えば、次の公知のアミド合成法によって製造することができる。
【0046】
【化7】
Figure 2004107227
【0047】
(式中、R、R及びRは前記と同様の意味を示す。)
すなわち、対応するジカルボン酸又はその反応性誘導体(エステル、酸ハライド、酸無水物等)とアミンを縮合させることにより、目的のジアミド化合物を効率的に得ることができる。
【0048】
成分(D)は、2種以上を併用してもよい。本発明の皮膚化粧料中における成分(D)の含有量は、剤型等により異なり特に制限されないが、全組成中に成分(B)+成分(D)の合計が0.00001〜15重量%であるように含有することが好ましく、0.0001〜10重量%であるように含有することが角質層のバリア機能及び水分保持機能の維持及び補強効果が高まる点から更に好ましい。
【0049】
本発明の化粧料には、必須成分(A)、(B)、(C)に更に(D)を含有することが好ましいが、特に好ましい組み合わせとしては、前記(A)成分が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(20)ステアリルエーテル共重合体及び/又はヒドロキシエチルセルロースヒドロキシプロピルステアリルエーテルヒドロキシプロピルスルホン酸ナトリウム;前記(B)成分が式(2)及び/又は式(3)
【0050】
【化8】
Figure 2004107227
【0051】
(式中、Rは、1つ以上の水酸基が置換していてもよい、炭素数8〜50の直鎖又は分岐鎖の飽和又は不飽和の炭化水素基、或いはR−COO−R−で表される基であり、Rは炭素数8〜30の直鎖又は分岐鎖の飽和又は不飽和の炭化水素基、Rは1つ以上の水酸基が置換していてもよい炭素数8〜40の直鎖又は分岐鎖の飽和又は不飽和の炭化水素基を示し、
は、1つ以上の水酸基が置換していてもよい、炭素数8〜50の直鎖又は分岐鎖の飽和又は不飽和の炭化水素基を示す。)
【0052】
【化9】
Figure 2004107227
【0053】
(式中、Rは炭素数9〜25の直鎖又は分岐鎖の飽和又は不飽和の炭化水素基を示し、Rは炭素数10〜26の直鎖又は分岐鎖の飽和又は不飽和の炭化水素基を示す)
で表わされるアミド誘導体;前記(C)成分が(C−2)成分としてジイソステアリン酸ポリグリセリル、及び(C−1)成分としてワセリン又はイソステアリルコレステリルエステルを併用するものであり;更に前記(D)成分が次の一般式(1)
【0054】
【化10】
Figure 2004107227
【0055】
(式中、Rは、水酸基及び/又はアルコキシ基が置換していてもよい、炭素数1〜22の直鎖又は分岐鎖の炭化水素基を示し、Rは、炭素数1〜12の直鎖又は分岐鎖の二価の炭化水素基を示し、Rは、炭素数1〜42の直鎖又は分岐鎖の二価の炭化水素基を示す。)
で表わされるジアミド化合物である。
【0056】
本発明に係る皮膚化粧料には、更に(E)揮発性及び不揮発性のジメチルポリシロキサンを含有することが、皮膚に滑らかさが付与され、且つ、塗布時のべたつきが抑えられて使用感が良好になる点から好ましい。
【0057】
ジメチルシロキサンとしては、種々の粘度(粧原基第一法に基づく)のものを単独又は2種以上組み合わせて用いることができるが、粘度が1〜20000mPa・S、更に好ましくは1〜1000mPa・Sのものを用いることが、良好な使用感の持続性及び皮膚を滑らかにする効果がより優れる点から好ましい。 本発明の皮膚化粧料中における成分(E)の含有量は、剤型等により異なり特に制限されないが、全組成中に0.1〜15重量%であることが、良好な使用感及び皮膚を滑らかにする効果の点から好ましい。
【0058】
本発明に係る皮膚化粧料には、上記成分以外に、必要に応じて通常の化粧料に配合される成分を配合することができる。例えば、粘度調製、起泡、乳化・分散助剤としての界面活性剤;滑らかさ等感触向上のためのポリエーテルシリコーン、メチルフェニルシリコーン等の変性シリコーン油;流動パラフィン、流動イソパラフィン、ロウ類、固体パラフィン等の(C)成分以外の油剤、防腐剤、酸化防止剤、紫外線遮蔽剤、ポリオール類、アミノ酸及びその塩類等の保湿剤、溶剤、各種エキス、殺菌剤、キレート剤、pH調整剤、増粘剤、色素、香料等を本発明の目的及び効果を損なわない質的及び量的範囲内で配合することができる。
【0059】
本発明の皮膚化粧料は、上記各材料を用いて常法に従って製造することができ、形態は可溶化系、乳化系等いずれでも良く、ローション、ジェル、クリーム、UVケア化粧料、エアゾールフォーム等の任意の剤型とすることができる。
【0060】
【実施例】
(実施例1〜7)
表1に示す割合に従って、精製水にグリセリン、メチルパラベンを加えて80℃で加熱溶解したものに、(A)成分を加え80℃で溶解した。これに必要に応じて水酸化カリウムを加え、水相を調整した。別途、80℃で(B)成分、(C)成分、(D)成分及びスクワランを均一に混合し油相を調整した。80℃で、この油相を、先に調整した水相に加え予備乳化を行った。ホモミキサーにて乳化粒子を均一に調整した後、脱気、ろ過を行い、皮膚化粧料を得た。この皮膚化粧料を用いてセラミド類の溶解性、保存安定性、使用感、皮膚刺激性を評価した。
【0061】
(比較例1)
表1に示す割合に従って、(A)成分の代わりに(A’)成分としてカルボキシルビニルポリマーを使用した以外は、実施例1と同様の手順で皮膚化粧料を得た。この皮膚化粧料を用いてセラミド類の溶解性、保存安定性、使用感、皮膚刺激性を評価した。
【0062】
(比較例2)
表1に示す割合に従って、(A)成分の代わりに界面活性剤を用いた。精製水にグリセリン、メチルパラベンを加えて80℃で加熱溶解し、水相を調製した。別途、(C)成分、スクワラン、界面活性剤を加え、80℃で加熱溶解し、油相を調整した。80℃で、この油相を、先に調整した水相に加え予備乳化を行った。さらにホモミキサーにて乳化粒子を均一にし、室温まで冷却した後、脱気、ろ過を行い、皮膚化粧料を得た。この皮膚化粧料を用いてセラミド類の溶解性、保存安定性、使用感、皮膚刺激性を評価した。
【0063】
(比較例3)
表1に示す割合に従って、(C)成分を使用しない以外は、実施例1と同様の手順で皮膚化粧料を得た。この皮膚化粧料を用いてセラミド類の溶解性、保存安定性、使用感、皮膚刺激性を評価した。
【0064】
なお、使用した材料の由来を以下に示す。
*1 アキュリン22:ISP製
*2 ヒドロキシエチルセルロース(ナトロゾル250HHX:ハーキュレス製)、ステアリルグリシジルエーテル(ステアリル基の置換度0.0036mol%:花王製)、及び2,3−エポキシプロパンスルホン酸ナトリウム(スルホン基の置換度0.115:花王製)を用いて、特開平9−235301号公報、特開平10−292001号公報記載の方法に準じて製造。
*3 PEMULEN TR−1:Noveon Inc製
*4 カーボポール980:Noveon Inc製
*5 セラミドIII:デグサ製
*6 ソフケアセラミドSL−E:花王製
*7 コスモール42:日清製油製
*8 イソステアリン酸コレステリル:花王製
*9 WO00/61097の製造例6
*10 WO00/61097の製造例11
*11 モノステアリン酸ポリオキシエチレン(20.E.O.)ソルビタン:商品名レオドールスーパーTW−S120:花王製
*12 ポリオキシエチレンラウリルエーテルリン酸ナトリウム:商品名SPE−104NB:花王製
【0065】
【表1】
Figure 2004107227
【0066】
(評価)
各実施例及び比較例で得られた皮膚化粧料について、下記の手順により保存安定性、使用感、皮膚刺激性を評価した。評価結果は表1に示す。
【0067】
(1)保存安定性
各実施例及び比較例で得られた皮膚化粧料を、5℃、室温(25℃)、50℃において、1ヶ月保存し、性状の変化(増粘、ゲル化、分離、結晶の析出等)の有無で評価した。
○:5℃、室温(25℃)、50℃において、性状変化が認められない。
△:5℃、室温(25℃)、50℃において、性状変化が少し認められる。
×:5℃、室温(25℃)、50℃において、性状変化が明らかに認められる。
【0068】
(2)使用感
化粧品専門評価パネラー10名により、得られた各皮膚化粧料を使用して、べたつきのなさを判断した。
○:8名以上が、べたつかず使用感が良いと評価した。
△:6、7名が、べたつかず使用感が良いと評価した。
×:5名以上が、べたついて使用感が悪いと評価した。
【0069】
(3)皮膚刺激性
敏感肌専門評価パネラー10名により、得られた各皮膚化粧料を使用して、刺激感(ヒリヒリ感、発赤、ブツブツ、カサツキ等)の有無を判断した。
○:8名以上が、刺激感がないと評価した。
△:6、7名が、刺激感がないと評価した。
×:5名以上が、刺激感があると評価した。
【0070】
実施例1〜7はいずれも、保存安定性、使用感、皮膚刺激性において良好な評価であった。(A)成分の代わりに汎用の水溶性高分子を用いた比較例1は、保存安定性の点において劣るものであった。(A)成分の代わりに汎用の界面活性剤を用いた比較例2は、使用感、及び皮膚刺激性の点で実施例に比べて劣るものであった。(C)成分を使用しなかった比較例3は、使用感の点で実施例に比べて劣るものであった。
【0071】
(実施例8:乳液)
表2に示す組成に従って、精製水にグリセリン、防腐剤を加えて80℃で加熱溶解したものと(A)成分を加え80℃で溶解した。これに水酸化カリウムを加えたものを水相とした。これに80℃で均一混合した(B)成分、(C)成分、(D)成分、スクワラン、メチルポリシロキサン、香料を加えて乳化した。ホモミキサーにて乳化粒子を均一に調整した後、脱気、ろ過を行い、乳液を得た。
【0072】
【表2】
Figure 2004107227
【0073】
(実施例9:クリーム)
表3に示す組成に従って、精製水にグリセリン、防腐剤を加えて80℃で加熱溶解したものと(A)成分を加え80℃で溶解した。これに水酸化カリウムを加えたものを水相とした。これに80℃で均一混合した(B)成分、(C)成分、(D)成分、香料を加えて乳化した。ホモミキサーにて乳化粒子を均一に調整した後、脱気、ろ過を行い、クリームを得た。
【0074】
【表3】
Figure 2004107227
【0075】
(実施例10:エッセンス)
表4に示す組成に従って、精製水にグリセリン、1,3−ブチレングリコール、エタノール、防腐剤を加えて80℃で加熱溶解したものと(A)成分を加え80℃でようかいし、水相とした。これに80℃で均一混合した(B)成分、(C)成分、(D)成分、メチルポリシロキサンを加えて乳化した。ホモミキサーにて乳化粒子を均一に調整した後、室温まで冷却し、脱気、ろ過を行い、エッセンスを得た。
【0076】
【表4】
Figure 2004107227
【0077】
実施例8〜10の皮膚化粧料は、いずれもセラミド類が良好に溶解し、保湿性に優れ、使用感、及び保存安定性が良好で、皮膚刺激性がなく安全性に優れた皮膚化粧料であった。
【0078】
【発明の効果】
本発明に係る皮膚化粧料は、保湿性に優れるが結晶性が高いために化粧料に配合することが困難なセラミド類(B)に、両親媒性高分子(A)、及び特定の油剤(C)を組み合わせて配合するため、従来セラミド類(B)を化粧料に配合するために必須とされてきた界面活性剤を使用しなくても、セラミド類(B)を配合した化粧料を調製することができ、界面活性剤を含有しないために皮膚刺激性がなく安全性に優れた化粧料である。また、本発明に係る皮膚化粧料は、セラミド類(B)を配合するため保湿性に優れ、両親媒性高分子(A)、及び特定の油剤(C)を組み合わせて配合するため、使用感及び保存安定性が良好である。
【0079】
本発明に係る皮膚化粧料に、更に(D)成分を含有する場合には、角質層のバリア機能及び水分保持機能の維持及び補強効果が高まる。
【0080】
また、本発明に係る皮膚化粧料に、更に(E)成分を含有する場合には、皮膚に滑らかさが付与され、且つ、塗布時のべたつきが抑えられて使用感が更に良好になる。[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a skin cosmetic excellent in moisture retention, excellent in use feeling and storage stability, and free of skin irritation and excellent in safety.
[0002]
[Prior art]
Ceramide, which is a main component of intercellular lipids present in the stratum corneum of the skin, is known to be a biological substance that has a skin barrier function and a moisture retention function. However, ceramides have high crystallinity and poor solubility in common cosmetic bases, so that it is difficult to incorporate them into cosmetics.
[0003]
As an attempt to stably blend ceramide or a ceramide-like compound into cosmetics, Patent Document 1 discloses that a nonionic surfactant and an ionic surfactant are blended. However, when a large amount or a plurality of surfactants are blended, the storage stability of the cosmetic tends to deteriorate, and further, the feeling of use and skin irritation are insufficient.
[0004]
Patent Literature 2 discloses that a barrier function and a water retention function of the stratum corneum can be substantially improved and reinforced by combining a specific diamide compound with a keratin intercellular lipid component such as ceramide or a ceramide-like compound. However, it is not sufficient in terms of stability and feeling of use of cosmetics.
[Patent Document 1]
JP-A-6-345633
[Patent Document 2]
JP-A-2002-114666
[0005]
[Problems to be solved by the invention]
An object of the present invention is to provide a skin cosmetic composition which is excellent in moisturizing property, has good storage stability, has no skin irritation, and is excellent in use feeling.
[0006]
[Means for Solving the Problems]
The inventors can solve the above-mentioned problems by blending an amphiphilic polymer and a specific oil agent with ceramides which are excellent in moisturizing properties but are difficult to be blended in cosmetics because of high crystallinity. Was found.
[0007]
That is, the present invention provides the following component (A), component (B), and component (C):
(A) an amphiphilic polymer,
(B) one or more compounds selected from ceramide and ceramide-like compounds, and
(C) a paste oil at 25 ° C. and / or a polar oil which is liquid at 25 ° C.
And a skin cosmetic containing the same.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
In the present specification, (meth) acryl represents acryl and methacryl.
[0009]
The skin cosmetic according to the present invention comprises the following components (A), (B), and (C) as essential components:
(A) an amphiphilic polymer,
(B) one or more compounds selected from ceramide and ceramide-like compounds, and
(C) It contains a paste oil at 25 ° C and / or a polar oil which is liquid at 25 ° C.
[0010]
The skin cosmetic according to the present invention is used for combining ceramide and ceramide-like compounds (hereinafter, referred to as ceramides) (B) with an amphiphilic polymer (A) and a specific oil agent (C). It is a cosmetic having excellent moisturizing properties, in which ceramides can be stably dissolved in a sufficient amount to exhibit performance. In addition, the skin cosmetic composition according to the present invention can provide a ceramide compound by using only a small amount of a surfactant which has been conventionally indispensable for blending the ceramide (B) into the cosmetic, or even without using a surfactant at all. It is possible to prepare a cosmetic in which (B) is uniformly and stably blended, and therefore, it is a cosmetic which has no skin irritation and is excellent in use feeling. Furthermore, since the skin cosmetic according to the present invention contains the ceramides (B) in combination with the amphiphilic polymer (A) and the specific oil agent (C), only the amphiphilic polymer (A) is used. The disadvantages of lacking in moist feeling when using the compound and the disadvantages of oily feeling when using only the specific oil agent (C) are canceled each other, so that the feeling of use is improved and the storage stability is also improved.
[0011]
In the present invention, the amphiphilic polymer as the component (A) is a polymer having a hydrophobic functional group and a hydrophilic functional group, and has an affinity for both an aqueous medium and an oil medium. As the amphiphilic polymer (A), any polymer can be used without particular limitation as long as it has affinity for both an aqueous medium and an oily medium, and has a viscosity increasing property and an emulsifying property. . As the hydrophobic functional group, a linear or branched saturated or unsaturated hydrocarbon group having 8 to 40 carbon atoms is preferable, and as the hydrophilic functional group, a carboxyl group, a sulfone group, a phosphate group, It is preferably an ionic functional group such as a tertiary amino group and a quaternary ammonium group.
[0012]
Examples of the amphiphilic polymer (A) include: alkyl acrylate copolymer; (meth) acrylic acid / alkyl (meth) acrylate copolymer; acrylic acid, methacrylic acid, alkyl acrylate, or alkyl methacrylate And polyoxyethylene stearyl ether and methacrylic acid esters; water-soluble cellulose derivatives; quaternary ammonium ethers; and polysaccharide derivatives. The copolymer may contain another monomer as long as the object of the present invention can be achieved.
[0013]
Specifically, as the alkyl acrylate copolymer, Accurin 33 (ISP) and the like are commercially available. As the (meth) acrylic acid / alkyl (meth) acrylate copolymer, Carbopol 1382, Pemulen TR-1, Pemulen TR-2 (above, Noveon INC.) And the like are commercially available. As a copolymer of at least one monomer of acrylic acid, methacrylic acid, alkyl acrylate or alkyl methacrylate, and a copolymer of polyoxyethylene stearyl ether and an ester of methacrylic acid, acrylic copolymers described in Cosmetics Regulations (1998 edition) Examples include alkyl acrylate / alkyl methacrylate / polyoxyethylene (20) stearyl ether copolymer, and commercially available products include Aculin 22 (ISP). Examples of the water-soluble cellulose derivative quaternary ammonium ether include hydroxyethyl cellulose hydroxypropyl lauryl dimethyl ammonium ether, and Quarterly Soft LM-200 (Union Carbide) is commercially available. Examples of the polysaccharide derivative include polysaccharide derivatives produced by the methods described in JP-A-9-235301 and JP-A-10-292001. For example, sodium hydroxyethylcellulose hydroxypropylstearyl ether hydroxypropylsulfonate is preferred.
[0014]
Among them, from the viewpoint of emulsifying dispersibility and storage stability, acrylic acid, methacrylic acid, alkyl acrylate, or a copolymer of at least one or more monomers of alkyl methacrylate and an ester of polyoxyethylene stearyl ether and an ester of methacrylic acid, It is preferable to use a water-soluble cellulose derivative quaternary ammonium ether, and an alkyl acrylate / alkyl methacrylate / polyoxyethylene (20) stearyl ether copolymer and / or hydroxyethyl cellulose hydroxypropyl stearyl ether hydroxypropyl sulfone More preferably, sodium acid is used.
[0015]
The amphiphilic polymer (A) may be used alone or in combination of two or more.
[0016]
The content of the amphiphilic polymer (A) in the skin cosmetic varies depending on the dosage form and the like, and is not particularly limited. However, the content is preferably 0.01 to 10% by weight in the whole composition, and the usability is good. It is particularly preferable that the content is 0.1 to 5% by weight from the viewpoint of viscosity.
[0017]
In the present invention, one or more compounds selected from ceramide and ceramide-like compounds used as the component (B) are components that impart excellent moisture retention.
[0018]
Ceramides include those extracted and purified from animals and plants, and those synthesized by microbiological or scientific methods. For example, an amide derivative represented by the following general formula (2) can be given.
[0019]
Embedded image
Figure 2004107227
[0020]
(Where R 4 Is a straight-chain or branched-chain saturated or unsaturated hydrocarbon group having 8 to 50 carbon atoms, which may be substituted by one or more hydroxyl groups, or R 6 -COO-R 7 A group represented by- 6 Is a straight-chain or branched-chain saturated or unsaturated hydrocarbon group having 8 to 30 carbon atoms, R 7 Represents a linear or branched saturated or unsaturated hydrocarbon group having 8 to 40 carbon atoms which may be substituted by one or more hydroxyl groups,
R 5 Represents a linear or branched, saturated or unsaturated hydrocarbon group having 8 to 50 carbon atoms, which may be substituted by one or more hydroxyl groups. )
Specifically, Robson K. et al. J. et al. J. et al. Lipid Res. , 35, 2060 (1994); W. et al. J. et al. Lipid Res. , 24, 759 (1983) and the like. Commercially available ceramides include ceramide III, ceramide IIIB, ceramide IIIA, ceramide IV, phytoceramide I (above, Degussa), ceramide II (Cedama), ceramide TIC-001 (Takasago Inc.) and the like. .
[0021]
On the other hand, examples of the ceramide-like compound include an amide derivative represented by the following formula (3) described in JP-A-62-228048.
[0022]
Embedded image
Figure 2004107227
[0023]
(Where R 8 Represents a linear or branched saturated or unsaturated hydrocarbon group having 9 to 25 carbon atoms; 9 Represents a linear or branched saturated or unsaturated hydrocarbon group having 10 to 26 carbon atoms)
The amide derivative represented by the formula (3) can be produced by the method described in JP-A-62-228048, JP-A-63-228048, and the like, and further, Sofcare ceramide SL-E (Kao) and the like are commercially available.
[0024]
As the component (B), it is preferable to use an amide derivative represented by the formula (2) and / or the formula (3) from the viewpoint of the moisturizing effect, and to use two or more of these compounds. Is preferred.
[0025]
The content of the ceramide (B) in the skin cosmetic varies depending on the dosage form and the like and is not particularly limited, but is preferably 0.00001 to 10% by weight in the whole composition, and is 0% from the viewpoint of the moisture retention effect. More preferably, it is 0.0001 to 5% by weight.
[0026]
The oil agent as the component (C) includes a paste oil agent (C-1) at 25 ° C and a polar oil agent (C-2) which is liquid at 25 ° C, and at least one selected from these is used.
[0027]
The oil agent (C-1) in the form of a paste at 25 ° C. is a semi-solid oil agent having a melting point at a temperature higher than 25 ° C. and not completely solidifying at 25 ° C., and is distinguished from liquid oil and solid fat. These are oils that are indicated as ointment-like, vaseline-like, etc. in the official compendium (such as cosmetic primordia).
[0028]
The oily agent in the form of a paste at 25 ° C. may be water-soluble or slightly soluble in water. Examples include lanolin, glyceryl trilanolin fatty acid, soft lanolin fatty acid, petrolatum, branched or hydroxylated fatty acid cholesteryl, dipentaerythritol fatty acid ester (such as dipentaerythritol hexaoxystearate) and the like. Among them, it is preferable to use petrolatum, a branched or hydroxylated fatty acid cholesteryl, dipentaerythritol fatty acid ester, from the viewpoints of good usability, excellent moisture retention, and good storage stability, and petrolatum, isostearin More preferably, cholesteryl acid and cholesteryl hydroxystearate are used.
[0029]
The polar oil agent (C-2) that is liquid at 25 ° C. refers to an oil agent that is liquid at 25 ° C. and has an electric dipole in the molecule. The polar oil agent (C-2) that is liquid at 25 ° C can be used without particular limitation as long as it is used for cosmetics, pharmaceuticals, and the like, and examples thereof include synthetic or natural ester oils.
[0030]
Specific examples of synthetic ester oils include cetyl octanoate, octyl dodecyl myristate, isopropyl palmitate, octyl palmitate, octyl stearate, decyl oleate, neopentyl glycol dicaprate, diisostearyl malate, adipic acid Diisobutyl, di (phytosteryl-2-octyldodecyl) N-lauroyl-L-glutamate, polyglyceryl monoisostearate, polyglyceryl diisostearate, polyglyceryl triisostearate, polyglyceryl tetraisostearate, neopentyl glycol di-2-ethylhexanoate, myristine Isopropyl acetate, isododecyl myristate, cetyl 2-ethylhexanoate, glycerin tri-2-ethylhexanoate, isostear myristate Le, sorbitan sesquioleate, octyldodecyl lactate, monoisostearate monomyristate, isotridecyl isononanoate, and the like.
[0031]
Natural ester oils include avocado oil, camellia oil, macadamia nut oil, corn oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil , Soybean oil, peanut oil, teaseed oil, kaya oil, rice bran oil, cinnamon oil, jojoba oil, germ oil and the like.
[0032]
Among them, as the polar oil agent (C-2) which is liquid at 25 ° C., from the viewpoint of compatibility with the component (B), polyglyceryl monoisostearate, polyglyceryl diisostearate, polyglyceryl triisostearate, polyglyceryl tetraisostearate, Neopentyl glycol 2-ethylhexanoate, isostearyl myristate, sorbitan sesquioleate, diisostearyl malate, octyldodecyl lactate, neopentyl glycol dicaprate, glyceryl monomyristate monoisostearate, isotridecyl isononanoate, myristic acid Isopropyl, cetyl octoate, decyl oleate, pentaerythritol tetra-2-ethylhexanoate, and olive oil are preferably used, and polyglycerol diisostearate is used. , Isopropyl myristate, cetyl octanoate, decyl oleate is used more preferably, polyglyceryl diisostearate is particularly preferably used.
[0033]
The content of the oily agent in the form of a paste at 25 ° C. and / or the polar oily agent (C) which is liquid at 25 ° C. in the skin cosmetic is appropriately adjusted depending on the dosage form and the like, and is not particularly limited. The content is preferably from 20 to 20% by weight, and more preferably from 0.3 to 10% by weight from the viewpoint of improving the usability.
[0034]
As the component (C), it is preferable to use a paste oil agent (C-1) and a liquid polar oil agent (C-2) in combination. It is preferable to use polyglyceryl diisostearate as the component (C-2) and petrolatum or isostearyl cholesteryl ester as the component (C-1).
[0035]
When the paste-like oil agent (C-1) at 25 ° C. and the polar oil agent (C-2) which is liquid at 25 ° C. are used together, each of C-1 and C-2 accounts for 0.1% in the total composition. The content is more preferably 1 to 10% by weight, and it is particularly preferable that each of C-1 and C-2 be contained in the entire composition in an amount of 0.3 to 10% by weight from the viewpoint of improving the usability. The weight ratio of C-1 to C-2 is preferably from 10:90 to 90:10, and more preferably from 20:80 to 50:50.
[0036]
The skin cosmetic according to the present invention further comprises (D) the following general formula (1)
[0037]
Embedded image
Figure 2004107227
[0038]
(Where R 1 Represents a linear or branched hydrocarbon group having 1 to 22 carbon atoms which may be substituted by a hydroxyl group and / or an alkoxy group; 2 Represents a linear or branched divalent hydrocarbon group having 1 to 12 carbon atoms; 3 Represents a linear or branched divalent hydrocarbon group having 1 to 42 carbon atoms. )
It is preferable to contain a diamide compound represented by the following formula: The diamide compound (D) is a ceramide function-like lipid compound exhibiting properties similar to ceramide that enhances the barrier effect and moisturizing effect of the skin itself, and when combined with (B), maintains the barrier function and moisture retention function of the stratum corneum. It is preferable in that the reinforcing effect is enhanced.
[0039]
R of the diamide compound represented by the general formula (1) of the component (D) 1 Is preferably a straight-chain or branched-chain alkyl group having 1 to 22 carbon atoms which may be substituted with 1 to 3 selected from a hydroxyl group and an alkoxy group having 1 to 6 carbon atoms, and the hydroxyl group and the alkoxy group are simultaneously substituted. You may have. Further, an alkyl group having 1 to 18 carbon atoms, a mono- or di-hydroxyalkyl group having 1 to 18 carbon atoms, an alkyl group having 1 to 18 carbon atoms substituted with an alkoxy having 1 to 6 carbon atoms, and hydroxy and 1 to 1 carbon atoms. An alkyl group having 1 to 18 carbon atoms substituted by 6 alkoxy groups is preferred. Furthermore, an alkyl group having 1 to 18 carbon atoms, a mono- or di-hydroxyalkyl group having 2 to 12 carbon atoms, an alkyl group having 2 to 12 carbon atoms substituted by alkoxy having 1 to 6 carbon atoms, hydroxy and carbon number An alkyl group having 2 to 12 carbon atoms substituted with 1 to 6 alkoxy is more preferred. Specifically, a methyl group, an ethyl group, a propyl group, a butyl group, a hexyl group, a dodecyl group, a 2-methylpropyl group, a 2-ethylhexyl group, a methyl-branched isostearyl group, a 2-hydroxyethyl group, and a 9-hydroxynonyl group , A 2,3-dihydroxypropyl group, a 2-methoxyethyl group, a 2-hydroxy-3-methoxypropyl group, and a 9-methoxynonyl group. Of these, a 2-hydroxyethyl group, a methyl group, a dodecyl group, and a 2-methoxyethyl group are more preferred.
[0040]
R 2 Is preferably a linear or branched alkylene group having 1 to 12 carbon atoms, more preferably a linear or branched alkylene group having 2 to 6 carbon atoms. Specifically, ethylene, trimethylene, tetramethylene, pentamethylene, hexamethylene, methylmethylene (ethylidene), 1-methylethylene, 2-methylethylene, 1-methyltrimethylene, 2 -Methyltrimethylene group, 1,1-dimethylethylene group, 2-ethyltrimethylene group and the like. Of these, an ethylene group and a trimethylene group are more preferred.
[0041]
In the general formula (1), R 3 Is preferably a linear or branched divalent hydrocarbon group having 2 to 34 carbon atoms, and more preferably a linear or branched alkylene group having 2 to 34 carbon atoms or alkenylene having 1 to 4 double bonds. A group is preferable, and a linear or branched alkylene group having 2 to 24 carbon atoms or an alkenylene group having 1 to 4 double bonds is particularly preferable. Specific examples include an ethylene group, a trimethylene group, a tetramethylene group, a hexamethylene group, a heptamethylene group, an octamethylene group, a decamethylene group, an undecamethylene group, a dodecamethylene group, a tridecamethylene group, a tetradecamethylene group, and a hexamethylene group. Decamethylene group, octadecamethylene group, tricosamethylene group, hexacosamethylene group, triacontamethylene group, 1-methylethylene group, 2-ethyltrimethylene group, 1-methylheptamethylene group, 2-methylheptamethylene group , 1-butylhexamethylene group, 2-methyl-5-ethylheptamethylene group, 2,3,6-trimethylheptamethylene group, 6-ethyldecamethylene group, 7-methyltetradecamethylene group, 7-ethylhexadecamine Methylene group, 7,12-dimethyloctadecamethylene group, 8 11-dimethyloctadecamethylene group, 7,10-dimethyl-7-ethylhexadecamethylene group, 1-octadecylethylene group, 9,10-dioctyloctadecamethylene group, 8,9-dinonylhexadecamethylene group, ethenylene Group, 1-octadecenylethylene group, 7,11-octadecadienylene group, 7-ethenyl-9-hexadecamethylene group, 7,12-dimethyl-7,11-octadecadienylene group, 8, Examples thereof include an 11-dimethyl-7,11-octadecadienylene group, a 9,10-dioctyl-7,11-octadecadienylene group, and an 8,9-dinonyl-6,10-hexadecadienylene group. Of these, 7,12-dimethyloctadecamethylene group, 7,12-dimethyl-7,11-octadecadienienene group, octadecamethylene group, octamethylene group, decamethylene group, undecamethylene group, and tridecamethylene group Is more preferred.
[0042]
Among the diamide compounds, preferred compounds are those represented by R in the general formula (1) 1 , R 2 And R 3 Are compounds obtained by combining the above groups in the more preferable ranges. Among the diamide compounds used in the external preparation composition of the present invention, particularly preferred are the following compounds.
[0043]
Embedded image
Figure 2004107227
[0044]
Embedded image
Figure 2004107227
[0045]
The diamide compound of the component (D) can be produced, for example, by the following known amide synthesis method.
[0046]
Embedded image
Figure 2004107227
[0047]
(Where R 1 , R 2 And R 3 Has the same meaning as described above. )
That is, by condensing the amine with the corresponding dicarboxylic acid or its reactive derivative (ester, acid halide, acid anhydride, etc.), the desired diamide compound can be efficiently obtained.
[0048]
As the component (D), two or more kinds may be used in combination. The content of the component (D) in the skin cosmetic of the present invention varies depending on the dosage form and the like and is not particularly limited, but the total of the component (B) + the component (D) is 0.00001 to 15% by weight in the whole composition. Is preferable, and the content is more preferably 0.0001 to 10% by weight, from the viewpoint of maintaining the barrier function and the moisture retention function of the stratum corneum and enhancing the reinforcing effect.
[0049]
The cosmetic of the present invention preferably further contains (D) in addition to the essential components (A), (B) and (C). In a particularly preferred combination, the component (A) is an alkyl acrylate. Alkyl methacrylate / polyoxyethylene (20) stearyl ether copolymer and / or sodium hydroxyethyl cellulose hydroxypropyl stearyl ether hydroxypropyl sulfonate; wherein the component (B) is represented by the formula (2) and / or the formula (3)
[0050]
Embedded image
Figure 2004107227
[0051]
(Where R 4 Is a straight-chain or branched-chain saturated or unsaturated hydrocarbon group having 8 to 50 carbon atoms, which may be substituted by one or more hydroxyl groups, or R 6 -COO-R 7 A group represented by- 6 Is a straight-chain or branched-chain saturated or unsaturated hydrocarbon group having 8 to 30 carbon atoms, R 7 Represents a linear or branched saturated or unsaturated hydrocarbon group having 8 to 40 carbon atoms which may be substituted by one or more hydroxyl groups,
R 5 Represents a linear or branched, saturated or unsaturated hydrocarbon group having 8 to 50 carbon atoms, which may be substituted by one or more hydroxyl groups. )
[0052]
Embedded image
Figure 2004107227
[0053]
(Where R 8 Represents a linear or branched saturated or unsaturated hydrocarbon group having 9 to 25 carbon atoms; 9 Represents a linear or branched saturated or unsaturated hydrocarbon group having 10 to 26 carbon atoms)
An amide derivative represented by the formula: wherein the component (C) is a combination of polyglyceryl diisostearate as the component (C-2) and petrolatum or isostearyl cholesteryl ester as the component (C-1); and the component (D) Is the following general formula (1)
[0054]
Embedded image
Figure 2004107227
[0055]
(Where R 1 Represents a linear or branched hydrocarbon group having 1 to 22 carbon atoms which may be substituted by a hydroxyl group and / or an alkoxy group; 2 Represents a linear or branched divalent hydrocarbon group having 1 to 12 carbon atoms; 3 Represents a linear or branched divalent hydrocarbon group having 1 to 42 carbon atoms. )
Is a diamide compound represented by
[0056]
The skin cosmetic composition according to the present invention further contains (E) a volatile and nonvolatile dimethylpolysiloxane, which imparts smoothness to the skin, suppresses stickiness during application, and provides a feeling of use. It is preferable from the viewpoint that it becomes better.
[0057]
As the dimethylsiloxane, those having various viscosities (based on the first method of cosmetic primordia) can be used alone or in combination of two or more, and the viscosity is preferably 1 to 20000 mPa · S, more preferably 1 to 1000 mPa · S. It is preferable to use one from the viewpoint that the durability of good feeling of use and the effect of smoothing the skin are more excellent. The content of the component (E) in the skin cosmetic of the present invention varies depending on the dosage form and the like, and is not particularly limited. However, the content of 0.1 to 15% by weight in the whole composition provides a good feeling of use and skin. This is preferable from the viewpoint of smoothing effect.
[0058]
The skin cosmetics according to the present invention may contain, in addition to the above-mentioned components, components to be added to ordinary cosmetics, if necessary. For example, surfactants as viscosity control, foaming, emulsification / dispersion aids; modified silicone oils such as polyether silicone and methylphenyl silicone for improving feel such as smoothness; liquid paraffin, liquid isoparaffin, waxes, and solids Oils other than the component (C) such as paraffin, preservatives, antioxidants, ultraviolet ray shielding agents, humectants such as polyols, amino acids and their salts, solvents, various extracts, bactericides, chelating agents, pH adjusters, Viscous agents, pigments, fragrances and the like can be blended within a qualitative and quantitative range that does not impair the objects and effects of the present invention.
[0059]
The skin cosmetic of the present invention can be produced according to a conventional method using each of the above-mentioned materials, and may be in any form of a solubilizing system, an emulsifying system, etc., such as a lotion, a gel, a cream, a UV care cosmetic, an aerosol foam, etc. Can be any dosage form.
[0060]
【Example】
(Examples 1 to 7)
In accordance with the ratios shown in Table 1, glycerin and methylparaben were added to purified water and dissolved by heating at 80 ° C, and the component (A) was added and dissolved at 80 ° C. Potassium hydroxide was added as needed to adjust the aqueous phase. Separately, the components (B), (C), (D) and squalane were uniformly mixed at 80 ° C. to prepare an oil phase. At 80 ° C., the oil phase was added to the previously prepared aqueous phase to perform preliminary emulsification. After uniformly adjusting the emulsified particles with a homomixer, deaeration and filtration were performed to obtain a skin cosmetic. Using this skin cosmetic, the solubility, storage stability, feeling of use, and skin irritation of ceramides were evaluated.
[0061]
(Comparative Example 1)
According to the ratios shown in Table 1, a skin cosmetic was obtained in the same procedure as in Example 1, except that a carboxyvinyl polymer was used as the component (A ') instead of the component (A). Using this skin cosmetic, the solubility, storage stability, feeling of use, and skin irritation of ceramides were evaluated.
[0062]
(Comparative Example 2)
According to the ratio shown in Table 1, a surfactant was used instead of the component (A). Glycerin and methylparaben were added to purified water and dissolved by heating at 80 ° C. to prepare an aqueous phase. Separately, the component (C), squalane, and a surfactant were added, and the mixture was heated and dissolved at 80 ° C. to prepare an oil phase. At 80 ° C., the oil phase was added to the previously prepared aqueous phase to perform preliminary emulsification. Further, the emulsified particles were homogenized with a homomixer, cooled to room temperature, then degassed and filtered to obtain a skin cosmetic. Using this skin cosmetic, the solubility, storage stability, feeling of use, and skin irritation of ceramides were evaluated.
[0063]
(Comparative Example 3)
According to the ratio shown in Table 1, except that the component (C) was not used, a skin cosmetic was obtained in the same procedure as in Example 1. Using this skin cosmetic, the solubility, storage stability, feeling of use, and skin irritation of ceramides were evaluated.
[0064]
In addition, the origin of the used material is shown below.
* 1 Accurin 22: manufactured by ISP
* 2 Hydroxyethyl cellulose (Natrosol 250HHX: manufactured by Hercules), stearyl glycidyl ether (substitution degree of stearyl group: 0.0036 mol%: manufactured by Kao), and sodium 2,3-epoxypropanesulfonate (degree of substitution of sulfone group: 0.115: Manufactured by Kao) in accordance with the methods described in JP-A-9-235301 and JP-A-10-292001.
* 3 PEMULEN TR-1: manufactured by Noveon Inc.
* 4 Carbopol 980: manufactured by Noveon Inc
* 5 Ceramide III: Degussa
* 6 Soft Care Ceramide SL-E: manufactured by Kao
* 7 Cosmall 42: Nisshin Oil Refinery
* 8 Cholesteryl isostearate: manufactured by Kao
* 9 Manufacturing Example 6 of WO00 / 61097
* 10 Manufacturing Example 11 of WO00 / 61097
* 11 Polyoxyethylene monostearate (20.EO) sorbitan: Trade name: Leodol Super TW-S120: manufactured by Kao
* 12 Sodium polyoxyethylene lauryl ether phosphate: trade name SPE-104NB: manufactured by Kao
[0065]
[Table 1]
Figure 2004107227
[0066]
(Evaluation)
The skin cosmetics obtained in each Example and Comparative Example were evaluated for storage stability, feeling of use, and skin irritation according to the following procedures. The evaluation results are shown in Table 1.
[0067]
(1) Storage stability
The skin cosmetics obtained in each Example and Comparative Example were stored at 5 ° C., room temperature (25 ° C.) and 50 ° C. for 1 month, and changed in properties (thickening, gelling, separation, precipitation of crystals, etc.). Was evaluated by the presence or absence of.
:: No change in properties was observed at 5 ° C., room temperature (25 ° C.), and 50 ° C.
Δ: At 5 ° C., room temperature (25 ° C.) and 50 ° C., a slight change in properties was observed.
×: At 5 ° C., room temperature (25 ° C.) and 50 ° C., a change in properties is clearly observed.
[0068]
(2) Usability
Non-stickiness was judged by each of the obtained skin cosmetics by ten cosmetic evaluation panelists.
:: Eight or more evaluated that the feeling of use was good without stickiness.
Δ: Six or seven persons evaluated that the feeling of use was good without stickiness.
×: Five or more people evaluated that the feeling of use was poor due to stickiness.
[0069]
(3) Skin irritation
Ten sensitive panelists evaluated the presence / absence of irritation (irritability, redness, bumps, swelling, etc.) using the obtained skin cosmetics.
:: Eight or more evaluated that there was no irritation.
B: Six or seven persons evaluated that there was no irritation.
X: Five or more persons evaluated that there was a feeling of irritation.
[0070]
Examples 1 to 7 all had good evaluations in storage stability, usability, and skin irritation. Comparative Example 1 using a general-purpose water-soluble polymer instead of the component (A) was inferior in storage stability. Comparative Example 2 in which a general-purpose surfactant was used in place of the component (A) was inferior to the examples in terms of usability and skin irritation. Comparative Example 3 in which the component (C) was not used was inferior to the Examples in terms of usability.
[0071]
(Example 8: emulsion)
According to the composition shown in Table 2, glycerin and a preservative were added to purified water and dissolved by heating at 80 ° C, and the component (A) was added and dissolved at 80 ° C. The aqueous phase was obtained by adding potassium hydroxide thereto. The components (B), (C) and (D), squalane, methylpolysiloxane and fragrance, which were uniformly mixed at 80 ° C., were added to the mixture and emulsified. After uniformly adjusting the emulsified particles with a homomixer, deaeration and filtration were performed to obtain an emulsion.
[0072]
[Table 2]
Figure 2004107227
[0073]
(Example 9: cream)
According to the composition shown in Table 3, glycerin and a preservative were added to purified water and dissolved by heating at 80 ° C, and the component (A) was added and dissolved at 80 ° C. The aqueous phase was obtained by adding potassium hydroxide thereto. The component (B), the component (C), the component (D), and the fragrance, which were uniformly mixed at 80 ° C., were added thereto and emulsified. After uniformly adjusting the emulsified particles with a homomixer, deaeration and filtration were performed to obtain a cream.
[0074]
[Table 3]
Figure 2004107227
[0075]
(Example 10: essence)
According to the composition shown in Table 4, glycerin, 1,3-butylene glycol, ethanol, and a preservative were added to purified water and dissolved by heating at 80 ° C., and the component (A) was added. . The component (B), the component (C), the component (D) and the methylpolysiloxane which were uniformly mixed at 80 ° C. were added thereto and emulsified. After uniformly adjusting the emulsified particles with a homomixer, the mixture was cooled to room temperature, deaerated and filtered to obtain an essence.
[0076]
[Table 4]
Figure 2004107227
[0077]
The skin cosmetics of Examples 8 to 10 all have ceramides dissolved well, have excellent moisturizing properties, have a good feeling in use and storage stability, have no skin irritation, and are excellent in safety. Met.
[0078]
【The invention's effect】
The skin cosmetics according to the present invention include ceramides (B) which are excellent in moisturizing properties but are difficult to be incorporated into cosmetics due to high crystallinity, amphiphilic polymers (A), and specific oils ( Because of combining C), a cosmetic containing ceramides (B) can be prepared without using a surfactant which has been conventionally essential for incorporating ceramides (B) into cosmetics. It is a cosmetic that is safe and has no skin irritation because it does not contain a surfactant. In addition, the skin cosmetic composition according to the present invention has excellent moisturizing properties because it contains a ceramide (B), and has a feeling of use because it is combined with an amphiphilic polymer (A) and a specific oil agent (C). And storage stability is good.
[0079]
When the skin cosmetic according to the present invention further contains the component (D), the effect of maintaining and reinforcing the barrier function and moisture retaining function of the stratum corneum is enhanced.
[0080]
Further, when the skin cosmetic according to the present invention further contains the component (E), smoothness is imparted to the skin and stickiness at the time of application is suppressed, so that the feeling of use is further improved.

Claims (2)

次の(A)成分、(B)成分、及び(C)成分:
(A)両親媒性高分子、
(B)セラミド及びセラミド類似化合物から選択される一種又は二種以上の化合物、及び
(C)25℃でペースト状の油剤及び/又は25℃で液体の極性油剤、
を含有する皮膚化粧料。
The following components (A), (B) and (C):
(A) an amphiphilic polymer,
(B) one or more compounds selected from ceramide and ceramide-like compounds, and (C) a paste oil at 25 ° C and / or a polar oil liquid at 25 ° C,
Skin cosmetics containing.
更に(D)次の一般式(1)
Figure 2004107227
(式中、Rは、水酸基及び/又はアルコキシ基が置換していてもよい、炭素数1〜22の直鎖又は分岐鎖の炭化水素基を示し、Rは、炭素数1〜12の直鎖又は分岐鎖の二価の炭化水素基を示し、Rは、炭素数1〜42の直鎖又は分岐鎖の二価の炭化水素基を示す。)
で表わされるジアミド化合物を含有する、請求項1に記載の皮膚化粧料。
Further, (D) the following general formula (1)
Figure 2004107227
(Wherein, R 1 represents a linear or branched hydrocarbon group having 1 to 22 carbon atoms, which may be substituted with a hydroxyl group and / or an alkoxy group, and R 2 has 1 to 12 carbon atoms. A linear or branched divalent hydrocarbon group is shown, and R 3 is a linear or branched divalent hydrocarbon group having 1 to 42 carbon atoms.)
The skin cosmetic according to claim 1, which comprises a diamide compound represented by the following formula:
JP2002269234A 2002-09-13 2002-09-13 Skin cosmetics Expired - Fee Related JP3779661B2 (en)

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JP2006124309A (en) * 2004-10-28 2006-05-18 Kao Corp Oil in water type emulsion composition
JP2007191443A (en) * 2006-01-20 2007-08-02 Kao Corp Oil-in-water type emulsion composition
EP1563831A4 (en) * 2004-10-26 2008-07-30 Shiseido Co Ltd External composition for skin
JP2010006786A (en) * 2008-06-30 2010-01-14 Mochida Pharmaceut Co Ltd Skin care preparation for external use
JP2011231049A (en) * 2010-04-28 2011-11-17 Kao Corp Production method of oil-in-water type emulsion
JP2012214469A (en) * 2011-03-31 2012-11-08 Kao Corp Emulsion composition
US8536380B2 (en) 2004-06-22 2013-09-17 Birken Gmbh Triterpene-containing oleogel-forming agent, triterpene-containing oleogel and method for producing a triterpene-containing oleogel
US11083733B2 (en) 2018-01-04 2021-08-10 Amryt Research Limited Betulin-containing birch bark extracts and their formulation

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JP2001122734A (en) * 1999-10-22 2001-05-08 Kao Corp Emulsified cosmetic
JP2001206834A (en) * 2000-01-25 2001-07-31 Kanebo Ltd Skin preparation for external use
JP2001233754A (en) * 2000-02-25 2001-08-28 Kanebo Ltd Emulsion type skin care preparation
JP2002114666A (en) * 2000-10-05 2002-04-16 Kao Corp Skin cosmetic
JP2003176210A (en) * 2001-12-12 2003-06-24 Nonogawa Shoji Kk Emulsion type cosmetic

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WO2000061097A1 (en) * 1999-04-08 2000-10-19 Kao Corporation External preparation compositions
JP2001122734A (en) * 1999-10-22 2001-05-08 Kao Corp Emulsified cosmetic
JP2001206834A (en) * 2000-01-25 2001-07-31 Kanebo Ltd Skin preparation for external use
JP2001233754A (en) * 2000-02-25 2001-08-28 Kanebo Ltd Emulsion type skin care preparation
JP2002114666A (en) * 2000-10-05 2002-04-16 Kao Corp Skin cosmetic
JP2003176210A (en) * 2001-12-12 2003-06-24 Nonogawa Shoji Kk Emulsion type cosmetic

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8536380B2 (en) 2004-06-22 2013-09-17 Birken Gmbh Triterpene-containing oleogel-forming agent, triterpene-containing oleogel and method for producing a triterpene-containing oleogel
EP1563831A4 (en) * 2004-10-26 2008-07-30 Shiseido Co Ltd External composition for skin
JP2006124309A (en) * 2004-10-28 2006-05-18 Kao Corp Oil in water type emulsion composition
JP2007191443A (en) * 2006-01-20 2007-08-02 Kao Corp Oil-in-water type emulsion composition
JP2010006786A (en) * 2008-06-30 2010-01-14 Mochida Pharmaceut Co Ltd Skin care preparation for external use
JP2011231049A (en) * 2010-04-28 2011-11-17 Kao Corp Production method of oil-in-water type emulsion
JP2012214469A (en) * 2011-03-31 2012-11-08 Kao Corp Emulsion composition
US11083733B2 (en) 2018-01-04 2021-08-10 Amryt Research Limited Betulin-containing birch bark extracts and their formulation
US11266660B2 (en) 2018-01-04 2022-03-08 Amryt Research Limited Betulin-containing birch bark extracts and their formulation
US11826374B2 (en) 2018-01-04 2023-11-28 Amryt Research Limited Betulin-containing birch bark extracts and their formulation

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