JP2014532051A - 油中水型エマルション及びその調製方法 - Google Patents
油中水型エマルション及びその調製方法 Download PDFInfo
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- JP2014532051A JP2014532051A JP2014532439A JP2014532439A JP2014532051A JP 2014532051 A JP2014532051 A JP 2014532051A JP 2014532439 A JP2014532439 A JP 2014532439A JP 2014532439 A JP2014532439 A JP 2014532439A JP 2014532051 A JP2014532051 A JP 2014532051A
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Abstract
Description
さらに望ましい実施形態では、当該エマルションの前記総含水率は、少なくとも70%(w/w)であり、特に75%(w/w)である。
さらに望ましい実施形態では、当該エマルションの前記親水性相は、ヒドロゲル化剤をさらに含む。
特定の実施形態において、その方法は、調製温度と、前記エマルションの総含水率と、前記エマルションの前記疎水性相において親水性親油性バランスの両親媒性分子における油に対する比率と、前記親水性相におけるヒドロゲル化剤の存在とからなる群から選択されるいずれか一つ又は複数の調製パラメータを調整することによって、前記疎水性相において形成される前記リオトロピック液晶性ナノ構造体の結晶相を制御することをさらに含む。
さらに望ましい実施形態では、当該方法における前記予混合する工程を少なくとも15,000rpmの回転速度、かつ少なくとも25,000s−1のせん断速度で行う。
図1の左のパネルにおいて、ナノ構造体を含む従来の水中油型分散系を示す。安定剤は、製剤を調製及び安定化するために必要である。その一方で、本発明に従う油中水型エマルションを調製する場合、水油相間用の乳化安定剤を必要とせず、分子安定剤及びコロイド安定剤のどちらも必要としない。正しくは、リオトロピック液晶性ナノ構造体の製剤及び所望の親水性相の高密度充填によって、製剤の安定性を実現する。
本発明は、水油相間用の乳化安定剤を使用せず、分子安定剤及びコロイド安定剤のどちらも使用することなく、高濃度で安定した油中水型エマルションを生成することができるという予期しない研究結果に基づく。この結果は、エマルションの連続疎水性相を形成するリオトロピック液晶性ナノ構造体の集合によって実現される。高温状態におけるせん断力の利用によって、本明細書において説明するエマルションを効率的に調製することができる。調製中に実験条件を制御することによって、目的の特定の利用に適した物理化学的特性を有する「カスタマイズ」したエマルションの調製が可能である。
説明及び請求項において「含む」という用語を用いる場合、他の構成要素又は工程は、除外されない。本発明の目的として、「からなる」という用語は、「含む」という用語の望ましい実施形態であると考慮される。本明細書の以降において、群が少なくとも一定数の実施形態を含むことを規定しており、望ましくは、これらの実施形態のみからなる群を開示するということも理解される。
特定の実施形態では、方法は、調製温度、エマルションの総含水率、エマルションの疎水性相において低い親水性親油性バランスの両親媒性分子における油に対する比率、及び親水性相におけるヒドロゲル化剤の存在からなる群から選択されるいずれか一つ又は複数の調製パラメータを調整することによって、疎水性相において形成されるリオトロピック液晶性ナノ構造体の結晶相を制御することをさらに含む。たとえばヘキサゴナル相を有するリオトロピック液晶性ナノ構造体といった所望のナノ構造体を有する油中水型エマルションを生成するために、特にこれらのパラメータのいずれか一つ又は複数を監視し、適用できる場合には、これに基づいて調整する。このように、調製パラメータを変更することによって、特定の利用に特に適合するような「カスタマイズ」又は「仕立て」たエマルションの調製が可能である。例示的な調製パラメータの結果として得られる各種のリオトロピック液晶性ナノ構造体を上記に説明している。
16gの「油相」(疎水性相)を約30℃で混合することにより調製する。この油相は、4.48gのグリセロールモノオレイン(GMO:glycerol monoolein)、6.72gのジグリセロールモノオレイン(DGMO:diglycerol monoolein)、4.67gのアーモンドオイル、及び0.13gのティーツリー油からなる。
11gの「油相」(疎水性相)を約30℃で混合することにより調製する。この油相は、3.08gのGMO、4.62gのDGMO、1.65gのアーモンドオイル、及び1.65gのひまわり油からなる。
160gの「油相」(疎水性相)を約30℃で混合することにより調製する。この油相は、44.8gのGMO、67.2gのDGMO、及び48gの月見草油からなる。
11gの「油相」(疎水性相)を約30℃で混合することにより調製する。この油相は、8.24gのMLO(DIMODAN(登録商標) U/J)、0.92gのアーモンドオイル、及び0.92gのR(+)−リモネンからなる。
15.2gの「油相」(疎水性相)を約40℃で混合することにより調製する。この油相は、12.0gのMLO(DIMODAN U/J)、2.13gのアーモンドオイル、及び1.07gのオレイン酸からなる。
15.2gの「油相」(疎水性相)を約40℃で混合することにより調製する。この油相は、12.0gのMLO(DIMODAN U/J)、2.13gのアーモンドオイル、及び1.07gのオレイン酸からなる。
Claims (15)
- 親水性相が分散した連続疎水性相を含む油中水型エマルションであって、
(1)当該エマルションは、30%〜95%(w/w)の範囲の総含水率を有し、
(2)当該エマルションは、乳化安定剤を含まず、
(3)前記疎水性相は、低い親水性親油性バランスの両親媒性分子における油に対する比率が50%〜96%(w/w)の範囲であり、
(4)前記連続疎水性相は、5%〜40%(w/w)の水を含むリオトロピック液晶性ナノ構造体で形成され、かつ、ラメラ相を含まず、
前記低い親水性親油性バランスの両親媒性分子は、親水性親油性バランス値が4及び11の間の範囲である油中水型エマルション。 - 前記リオトロピック液晶性ナノ構造体は、流体性アイソトロピック、ヘキサゴナル、両連続キュービック、及び離散ミセルキュービックからなる群から選択される結晶相を有する請求項1に記載の油中水型エマルション。
- 前記親水性相が、0.1μm〜50μmの範囲の直径を有する液滴の形で分散した請求項1又は請求項2に記載の油中水型エマルション。
- 前記総含水率は、少なくとも70%(w/w)であり、特に75%(w/w)である請求項1〜請求項3のいずれか一項に記載の油中水型エマルション。
- 前記油は、天然油である請求項1〜請求項4のいずれか一項に記載の油中水型エマルション。
- 前記親水性相は、ヒドロゲル化剤をさらに含む請求項1〜請求項5のいずれか一項に記載の油中水型エマルション。
- 請求項1〜請求項6のいずれか一項に記載のリオトロピック液晶性ナノ構造体で形成される連続疎水性相を含む油中水型エマルションの調製方法であって、
(a)少なくとも4,000rpmの回転速度かつ少なくとも40℃で親水性相及び疎水性相の二つの流体を予混合することによって、エマルション原液を生成することと、
(b)前記エマルション原液をせん断装置に配置することと、
(c)少なくとも4,500s−1のせん断速度で作動させ、得られた最終エマルションを周囲温度まで冷却することによって、リオトロピック液晶性ナノ構造体で形成されるエマルションの連続疎水性相を生成することと
を含む方法。 - 前記せん断装置は、クエット層流せん断装置である請求項7に記載の方法。
- 調製温度と、前記エマルションの総含水率と、前記エマルションの前記疎水性相において低い親水性親油性バランスの両親媒性分子における油に対する比率と、前記親水性相におけるヒドロゲル化剤の存在とからなる群から選択されるいずれか一つ又は複数の調製パラメータを調整することによって、前記疎水性相において形成される前記リオトロピック液晶性ナノ構造体の結晶相を制御することをさらに含む請求項7又は請求項8に記載の方法。
- 前記予混合する工程を少なくとも60℃で行う請求項7〜請求項9のいずれか一項に記載の方法。
- 前記予混合する工程を少なくとも15,000rpmの回転速度、かつ少なくとも25,000s−1のせん断速度で行う請求項7〜請求項10のいずれか一項に記載の方法。
- 請求項7〜請求項11のいずれか一項に記載の方法に従って調製される油中水型エマルションであって、前記リオトロピック液晶性ナノ構造体で形成される連続疎水性相を含む油中水型エマルション。
- 請求項1〜請求項6のいずれか一項に記載の特徴を有する請求項12に記載の油中水型エマルション。
- 化粧品組成物又は医薬品組成物の調製用の請求項1〜請求項6のいずれか一項に記載の油中水型エマルションの使用方法であって、前記組成物は、一つ又は複数の有効成分を含む油中水型エマルションの使用方法。
- 前記化粧品組成物又は前記医薬品組成物は、局所使用用であり、特に、クリーム剤、ローション剤、ムース剤、及びバーム剤からなる群から選択される請求項14に記載の使用方法。
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JP2007291023A (ja) * | 2006-04-26 | 2007-11-08 | Cosmos Technical Center:Kk | 皮膚外用剤 |
JP2010248173A (ja) * | 2009-03-27 | 2010-11-04 | Shiseido Co Ltd | 油中水型乳化組成物 |
WO2011007082A1 (fr) * | 2009-07-17 | 2011-01-20 | Centre National De La Recherche Scientifique - Cnrs - | Emulsion activable par ultrasons et son procede de fabrication |
JP2012017318A (ja) * | 2010-06-07 | 2012-01-26 | Nikko Chemical Co Ltd | 液晶及びそれを含有する皮膚外用剤 |
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JP2021059680A (ja) * | 2019-10-08 | 2021-04-15 | 花王株式会社 | 液晶組成物 |
WO2021070709A1 (ja) * | 2019-10-08 | 2021-04-15 | 花王株式会社 | 液晶組成物 |
JP2021134198A (ja) * | 2020-02-28 | 2021-09-13 | 花王株式会社 | 口腔用組成物 |
JP7565159B2 (ja) | 2020-02-28 | 2024-10-10 | 花王株式会社 | 口腔用組成物 |
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EP2790655B1 (en) | 2016-11-09 |
EP2604253A1 (en) | 2013-06-19 |
WO2013087791A1 (en) | 2013-06-20 |
CA2850599C (en) | 2016-12-06 |
US20140294904A1 (en) | 2014-10-02 |
CA2850599A1 (en) | 2013-06-20 |
EP2790655A1 (en) | 2014-10-22 |
JP5952410B2 (ja) | 2016-07-13 |
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