JP2010116373A - 多層被覆粒子及びその製造方法並びにそれを含有する皮膚外用剤 - Google Patents
多層被覆粒子及びその製造方法並びにそれを含有する皮膚外用剤 Download PDFInfo
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- JP2010116373A JP2010116373A JP2008292283A JP2008292283A JP2010116373A JP 2010116373 A JP2010116373 A JP 2010116373A JP 2008292283 A JP2008292283 A JP 2008292283A JP 2008292283 A JP2008292283 A JP 2008292283A JP 2010116373 A JP2010116373 A JP 2010116373A
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Abstract
【解決手段】平均粒径が50nm〜1mmで薬効成分を含有する多孔性粒子が、正電荷を有する多糖重合体と負電荷を有するアクリル酸系重合体とを交互に吸着させて形成した重合体・積層膜により被覆された多層被覆粒子を用いる。該重合体・積層膜はその多孔性粒子を保護するシェルとしての機能を有しており、積層膜の厚さや密度を変化させることにより、その薬効成分の加水分解等に対する経時安定性を向上できる。
【選択図】図1
Description
また、レチノールに代表されるレチノイド類を配合した皮膚用外用剤は、その配合量が多いと皮膚刺激が問題となり、配合量が限定されその効果が十分に発揮されない場合があるなどの課題が存在していた。
本発明の多層被覆粒子は、平均粒径が50nm〜1mmで薬効成分を含有する多孔性粒子が、正電荷を有する多糖重合体と負電荷を有するアクリル酸系重合体とを交互に吸着させて形成した重合体積層膜により被覆されてなることを特徴とするものである。
抗酸化作用を有する物質(抗酸化剤)は、酸化反応を阻害するか、酸素又は過酸化物によって促進される反応を抑制する物質であり、特に脂溶性抗酸化剤は細胞膜中に吸収されて酸素ラジカルを中和することができるので好ましい。本発明において好ましい抗酸化剤としては、カロテノイド、レチノイド(レチノール及びその誘導体)、スーパーオキサイドディスムターゼ、マンニトール、クエルセチン、カテキン及びその誘導体、ルチン及びその誘導体、ボタンピ抽出物、ヤシャジツ抽出物、メリッサ抽出物、羅漢果抽出物、チアミンおよびその誘導体、リボフラビンおよびその誘導体、ピリドキシンおよびその誘導体、ニコチン酸およびその誘導体等のビタミンB類、トコフェロール及びその誘導体等のビタミンE類、ジブチルヒドロキシトルエン及びブチルヒドロキシアニソール等が挙げられる。さらに、好ましくはアスタキサンチンや、レチノール、レチナール、レチノイン酸、パルミチン酸レチニル、酢酸レチニル、そしてリノール酸レチニルを挙げることができる。
美白剤は日焼け等により生じる皮膚の黒化、色素沈着により生ずるシミ、ソバカス等の現象を防止する目的で用いられ、アルブチン、ハイドロキノン、エラグ酸、リノール酸、ビタミンC及びその誘導体、AMP、ビタミンE及びその誘導体、4-メトキシサリチル酸カリウム塩、グリチルリチン酸及びその誘導体、トラネキサム酸、4-n-ブチルレゾルシノール、5,5’-ジプロピル-ビフェニル-2,2’-ジオールなどのビフェニル誘導体、胎盤抽出物、カミツレ抽出物、カンゾウ抽出物、エイジツ抽出物、オウゴン抽出物、海藻抽出物、クジン抽出物、ケイケットウ抽出物、ゴカヒ抽出物、コメヌカ抽出物、小麦胚芽抽出物、サイシン抽出物、サンザシ抽出物、サンペンズ抽出物、シラユリ抽出物、シャクヤク抽出物、センプクカ抽出物、大豆抽出物、茶抽出物、糖蜜抽出物、ビャクレン抽出物、ブドウ抽出物、ホップ抽出物、マイカイカ抽出物、モッカ抽出物、ユキノシタ抽出物、ヨクイニン抽出物等が挙げられる。
なお、本発明においては、1層とは多孔性粒子の概ね全面を覆う重合体の集合膜を言い、多層構造とはその集合膜が正電荷を有する重合体と負電荷を有する重合体とでポリイオンコンプレックスを形成し、積層された構造を言い、ゼータ電位等の方法により確認することができる。
本発明の多層被覆粒子の製造方法は、薬効成分を含有する多孔性粒子を調製し、その多孔性粒子を正電荷を有する多糖重合体を含む溶液と負電荷を有するアクリル酸系重合体を含む溶液とに交互に浸漬し、その多糖重合体とそのアクリル酸系重合体とからなる重合体積層膜により多孔性粒子を被覆するものである。
(実施例1)
アスタキサンチンの5質量%トリ(カプリル/カプリン酸)トリグリセリル溶液1.0gをエタノール200mlに溶解させた溶液に多孔性シリカ粒子(平均粒径3μm、比表面積約500m2/g)15.0gを添加した後、エバポレーターにて溶媒を除去して、アスタキサンチンをシリカ粒子に含有させた。
アスタキサンチンの5質量%トリ(カプリル/カプリン酸)トリグリセリル溶液1.0gをエタノール200mlに溶解させた溶液に多孔性シリカ粒子(平均粒径3μm、比表面積約500m2/g)15.0gを添加した後、エバポレーターにて溶媒を除去して、アスタキサンチンをシリカ粒子に含有させた。
アスタキサンチンの5質量%トリ(カプリル/カプリン酸)トリグリセリル溶液1.0gをエタノール200mlに溶解させた溶液に多孔性シリカ粒子(平均粒径3μm、比表面積約500m2/g)15.0gを添加した後、エバポレーターにて溶媒を除去して、アスタキサンチンを担持させたシリカ粒子3を得た。
1.放出性評価
実施例1及び2の多層被覆シリカ粒子0.1gを精製水、2質量%塩化ナトリウム水溶液2mlにそれぞれ添加し室温に放置した。一定時間経過後(直後、1時間後、3時間後、5時間後)、遠心分離により溶媒を取り除き、そこへエタノール1ml添加することで、アスタキサンチンを抽出し、吸光光度計UV−2500PC(島津製作所社製)を用いて475.8nmにおける吸光光度を測定した。一定時間経過後のエタノール中のアスタキサンチン量Xsolを多層被覆シリカ粒子からの放出量とし、多層被覆シリカ粒子によるアスタキサンチンの初期担持量をXoとし、以下の式により放出率を算出して、放出性を評価した。比較例のシリカ粒子についても、同様の方法により評価した。
図1は、多層被覆シリカ粒子1の放出率と時間との関係を示すグラフである。また、表1に放出率の値を示す。
実施例1の多層被覆シリカ粒子1と比較例1のシリカ粒子3を用い、50℃における経時安定性を、以下の方法により評価した。
実施例1の多層被覆シリカ粒子1と比較例1のシリカ粒子3の0.1gに精製水2mlを添加し、水分散物を作成し、50℃で24時間静置した。その後、サンプルを遠心分離し溶媒を取り除き、そこへエタノールを1ml添加することで、アスタキサンチンを抽出し、吸光光度計UV−2500PC(島津製作所社製)を用いて475.8nmにおける吸光光度を測定した。24時間後のエタノール中のアスタキサンチン量とアスタキサンチンの初期担持量より、アスタキサンチン残存率を算出した。
アスタキサンチンを単にシリカに担持させた場合は残存率が27.5%であった。これに対し、多層被覆シリカ粒子では残存率が61.2%であり、アスタキサンチンの経時安定性が向上した。
以下に示した成分1〜8をそれぞれの割合で加えて80℃に加温した。さらに、成分9〜18をそれぞれの割合で加えたものを80℃に加温し、攪拌しながら乳化した。続いて、攪拌しながら冷却し、乳液を調製した(%は質量%を表す)。
2.テトラオレイン酸ポリオキシプロピレンソルビトール(40PO) 1.5%
3.親油型モノステアリン酸グリセリル 1.0%
4.ステアリン酸 0.5%
5.ベヘニルアルコール 1.5%
6.スクワラン 5.0%
7.2−エチルヘキサン酸セチル 5.0%
8.メチルポリシロキサン 0.5%
9.(メタ)アクリル酸/(メタ)アクリル酸アルキルエステル共重合体 0.1%
10.キサンタンガム 0.1%
11.水酸化ナトリウム 0.05%
12.乳酸ソーダ 0.3%
13.クエン酸 0.01%
14.リン酸一水素ナトリウム 0.1%
15.1,3−ブチレングリコール 7.0%
16.多層被覆シリカ粒子1 3.0%
17.防腐剤 適量
18.精製水 合計で100%となる割合
以下に示した成分1〜12をそれぞれの割合で常温にて混合溶解し、攪拌しながら粘稠性液体とし、美容液を調製した(%は質量%を表す)。
2.水酸化ナトリウム 0.08%
3.リン酸L−アスコルビン酸マグネシウム 3.0%
4.クエン酸ナトリウム 0.5%
5.エデト酸4ナトリウム 0.1%
6.1,3−ブチレングリコール 7.0%
7.グリセリン 8.0%
8.精製水 合計で100%となる割合
9.グリシン 0.1%
10.多層被覆シリカ粒子2 5.0%
11.防腐剤 適量
12.エタノール 5.0%
Claims (7)
- 平均粒径が50nm〜1mmで薬効成分を含有する多孔性粒子が、正電荷を有する多糖重合体と負電荷を有するアクリル酸系重合体とを交互に吸着させて形成した重合体積層膜により被覆されてなる多層被覆粒子。
- 前記アクリル酸系重合体が(メタ)アクリル酸−(メタ)アクリル酸アルキルエステル共重合体である請求項1記載の多層被覆粒子。
- 前記多糖重合体がカチオン化セルロース及び/又はカチオン化グアーガムである請求項1又は2に記載の多層被覆粒子。
- 前記多孔性粒子がシリカ粒子である請求項1から3のいずれか一つに記載の多層被覆粒子。
- 前記薬効成分がレチノイド類及び/又はカロテノイド類である請求項1から4のいずれか一つに記載の多層被覆粒子。
- 薬効成分を含有する多孔性粒子を調製し、該多孔性粒子を正電荷を有する多糖重合体を含む溶液と負電荷を有するアクリル酸系重合体を含む溶液とに交互に浸漬し、該多糖重合体と該アクリル酸系重合体とからなる重合体積層膜により該多孔性粒子を被覆する多層被覆粒子の製造方法。
- 平均粒径が50nm〜1mmで薬効成分を含有する多孔性粒子が、正電荷を有する多糖重合体と負電荷を有するアクリル酸系重合体とを交互に吸着させて形成した重合体積層膜により被覆されてなる多層被覆粒子を含有する皮膚外用剤。
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JP2014189495A (ja) * | 2013-03-26 | 2014-10-06 | Kose Corp | カロテノイド含有組成物、並びにカロテノイドの劣化抑制剤及び劣化抑制方法 |
JP2016523896A (ja) * | 2013-08-08 | 2016-08-12 | バイオジェニックス インコーポレイテッド | 水難溶性物質を用いた安定化した三重層カプセル、その製造方法及びこれを用いた化粧品組成物 |
JP6083610B2 (ja) * | 2011-03-31 | 2017-02-22 | 国立大学法人豊橋技術科学大学 | 複合粒子製造装置および複合粒子の製造方法 |
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JP6083610B2 (ja) * | 2011-03-31 | 2017-02-22 | 国立大学法人豊橋技術科学大学 | 複合粒子製造装置および複合粒子の製造方法 |
JP2014189495A (ja) * | 2013-03-26 | 2014-10-06 | Kose Corp | カロテノイド含有組成物、並びにカロテノイドの劣化抑制剤及び劣化抑制方法 |
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US10806233B2 (en) | 2015-11-17 | 2020-10-20 | Elc Management Llc | Mascara composition and method |
CN108697617A (zh) * | 2015-11-17 | 2018-10-23 | Elc 管理有限责任公司 | 睫毛膏组合物和方法 |
JP2018533636A (ja) * | 2015-11-17 | 2018-11-15 | イーエルシー マネージメント エルエルシー | マスカラ組成物および方法 |
JP2018533637A (ja) * | 2015-11-17 | 2018-11-15 | イーエルシー マネージメント エルエルシー | マスカラ組成物および方法 |
KR20180067728A (ko) * | 2015-11-17 | 2018-06-20 | 이엘씨 매니지먼트 엘엘씨 | 마스카라 조성물 및 방법 |
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CN108472237B (zh) * | 2015-11-17 | 2021-12-28 | Elc 管理有限责任公司 | 睫毛膏组合物和方法 |
CN108697617B (zh) * | 2015-11-17 | 2021-08-13 | Elc 管理有限责任公司 | 睫毛膏组合物和方法 |
KR102144716B1 (ko) | 2015-11-17 | 2020-08-18 | 이엘씨 매니지먼트 엘엘씨 | 마스카라 조성물 및 방법 |
CN108472237A (zh) * | 2015-11-17 | 2018-08-31 | Elc 管理有限责任公司 | 睫毛膏组合物和方法 |
JP2019055369A (ja) * | 2017-09-21 | 2019-04-11 | 水澤化学工業株式会社 | 機能性成分の吸着に用いる吸着剤 |
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JP7094816B2 (ja) | 2018-07-19 | 2022-07-04 | 株式会社ファンケル | アスタキサンチン含有粉末 |
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