JP6707727B2 - 乳化物及び乳化物の製造方法 - Google Patents
乳化物及び乳化物の製造方法 Download PDFInfo
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- JP6707727B2 JP6707727B2 JP2016197005A JP2016197005A JP6707727B2 JP 6707727 B2 JP6707727 B2 JP 6707727B2 JP 2016197005 A JP2016197005 A JP 2016197005A JP 2016197005 A JP2016197005 A JP 2016197005A JP 6707727 B2 JP6707727 B2 JP 6707727B2
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Description
前記乳化剤分散液と、抱水性油剤を含む油剤とを、前記抱水性油剤の融点以上の温度にて混合することで、O/Wエマルションを形成する工程と、を有する乳化物の製造方法。
乳化剤分散液と、抱水性油剤を含む油剤とを、抱水性油剤の融点以上の温度にて混合することで、O/Wエマルションを形成する工程と、を有する方法により製造される。
水139.0gにレシチン1.0gを加えて撹拌した。この撹拌液100gを80℃に加熱し、温水40gを加え、更に80℃のセタノール60gを加えた。この液を、ホモミキサーにより6000rpm、80℃、10分間に亘って撹拌し、乳化を行った。その後、15分間かけて放冷し、更に35℃まで水冷することで、乳化物を調製した。
乳化を、ホモミキサーを用いず、70℃で5分間に亘り静置した点を除き、実施例1と同様の手順で、乳化物を調製した。
80℃の水139.9gにアルカシーラン0.1gを加えて撹拌した。この撹拌液100gに80℃のセタノール60gを加えた。この液を、ホモミキサーにより6000rpm、80℃、5分間に亘って撹拌し、乳化を行った。その後、4000rpmで撹拌しながら10分間かけて40℃まで冷却し、更に25℃まで水冷することで、乳化物を調製した。
6人のパネラに、各乳化物約0.5gを、前腕内側部分の皮膚に適用させ、その時及びその後の使用感について、3段階(○:良、△:普通、×:悪)で評価させた。この結果を表1に示す。
エマルション形成後の冷却を、放冷を行わず、全工程を撹拌しながら水冷して行った点を除き、実施例1と同様の手順で乳化物を調製した。図4は、本実施例で調製した乳化物の同一視野(倍率200倍)における全光顕微鏡写真(a)及び同一視野における偏光顕微鏡写真(b)である。(a)において断面円形に観察される内相の一部分が、(b)において黒十字ニコルを示しており、リオトロピック球状液晶が形成されていることが認められる。なお、乳化した内相の割合自体が小さく、また、1.0μm以上の断面長径を有する内相において、リオトロピック球状液晶の状態である油相の割合は、30%にとどまった。このことから、エマルション形成後の冷却を徐々に行うことが、乳化及びリオトロピック球状液晶の形成のために重要であることが分かった。調製した乳化物について、実施例1と同様の手順で評価した結果を表2に示す。
実施例4では、水の量を159.0g、セタノールの量を40gとし、実施例5では、水の量を179.0g、セタノールの量を20gとした点を除き、実施例1と同様の手順で乳化物を調製した。また、実施例6では、セタノールの代わりにステアリルアルコールを用いた点を除き、実施例1と同様の手順で乳化物を調製した。調製した乳化物について、実施例1と同様の手順で評価した結果を表2に示す。
Claims (8)
- 内相は高級アルコールを含みかつ少なくとも一部がリオトロピック球状液晶の状態である油相であり、外相は水相であり、自発的に閉鎖小胞体を形成する両親媒性物質により形成された閉鎖小胞体又は水酸基を有する半合成高分子又は合成高分子である重縮合ポリマー(ポリエステル類およびブロックコポリマーを除く)の粒子を含み、
前記閉鎖小胞体又は前記重縮合ポリマーの粒子が水相及び油相の界面に介在し、
1.0μm以上の断面長径を有する前記内相においてリオトロピック球状液晶の状態である油相の割合は80%以上であるO/Wエマルションを含む乳化物。 - 前記高級アルコールの配合割合が前記乳化物に対して10質量%超である請求項1記載の乳化物。
- 請求項1又は2記載の乳化物を含み、皮膚又は毛髪に適用される化粧料。
- 両親媒性物質の二分子膜の層状体を水に分散させ、又は水酸基を有する半合成高分子又は合成高分子である重縮合ポリマー(ポリエステル類およびブロックコポリマーを除く)を水中に単粒子化させ、前記両親媒性物質により形成された閉鎖小胞体又は前記重縮合ポリマーの粒子を含む乳化剤分散液を形成する工程と、
前記乳化剤分散液と、高級アルコールを含む油剤とを、前記高級アルコールの融点以上の温度にて混合することで、O/Wエマルションを形成する工程と、を有する請求項1または2記載の乳化物の製造方法。 - 前記O/Wエマルションを形成する工程において、前記高級アルコールの配合量が、前記乳化物に対して10質量%超である請求項4記載の乳化物の製造方法。
- 請求項4記載の方法で製造された乳化物を化粧料に加工する工程を有する化粧料の製造方法。
- 前記加工する工程は、前記乳化物を水で希釈する工程を有する請求項6記載の化粧料の製造方法。
- 前記加工する工程は、前記乳化物に液状油成分の乳化物を加える工程を有する請求項6又は7記載の化粧料の製造方法。
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