JP5930877B2 - 経皮吸収製剤 - Google Patents
経皮吸収製剤 Download PDFInfo
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- JP5930877B2 JP5930877B2 JP2012144937A JP2012144937A JP5930877B2 JP 5930877 B2 JP5930877 B2 JP 5930877B2 JP 2012144937 A JP2012144937 A JP 2012144937A JP 2012144937 A JP2012144937 A JP 2012144937A JP 5930877 B2 JP5930877 B2 JP 5930877B2
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- adhesive layer
- sensitive adhesive
- pressure
- support film
- ethylene
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Description
表1に示す支持体、粘着剤組成、架橋剤、油性添加剤を用いて、支持体の片面に厚み100μmの粘着剤層を形成した経皮吸収製剤を作製した。
なお、表1に記載の材料の詳細は、以下の通りである。
・EVOH(EF−E):エチレン−ビニルアルコール共重合体、クラレ社製“EF−E”、ケン化度99.9%、エチレン単位の比率44モル%、厚み30μm
・EVOH(EF−F):エチレン−ビニルアルコール共重合体、クラレ社製“EF−F”、ケン化度99.9%、エチレン単位の比率32モル%、厚み30μm
・EVOH(EF−E)下塗り処理:上記EVOH(EF−E)の片面に、日本触媒社製“ポリメントNK−350”を約0.12μm厚で塗布。
・EVA:エチレン−酢酸ビニル共重合体、タマポリ社製“SBシリーズ”、厚み30μm
・PE:ポリエチレン、3M社製“Cotran9720”、厚み76.2μm
・EHA/VP/AA:アクリル酸2−エチルヘキシルエステル/2−ビニルピロリドン/アクリル酸の共重合体
・EHA/AA:アクリル酸2−エチルヘキシルエステル/アクリル酸の共重合体
・ALCH:アルミニウムエチルアセテート・ジイソプロピレート、川研ファインケミカルズ社製
・IPM:ミリスチン酸イソプロピル
・GTC:トリカプリル酸グリセリル
また、架橋処理を行っていない実施例5〜6にて得られた経皮吸収製剤は、粘着剤60重量部に対して油性添加剤40重量部を含有させた粘着剤層を形成したものである。
比較例1〜2にて得られた経皮吸収製剤は、粘着剤59.88重量部に対して油性添加剤40重量部を含有させ、架橋剤0.12重量部によって架橋処理を行った粘着剤層を形成したものである。
得られた経皮吸収製剤を25℃で30日間密封保存したのち、5cm2の大きさに裁断し、支持フィルムと粘着剤層を剥離した。
粘着剤層を剥離した支持フィルム中から油性添加剤を抽出して、支持フィルムへの油性添加剤の吸着量を測定した。測定は支持フィルムを抽出溶剤(IPMの抽出:n−ヘキサン、GTCの抽出:N,N−ジメチルアセトアミド)に40℃で1時間浸漬したのち、ガスクロマトグラフィーを用いてFID検出器にて定量した。吸着率は、経皮吸収製剤の作製時に粘着剤層中に配合する油性添加剤の含有量を100重量%として、上記のように抽出、測定した油性添加剤の量の比率を%で表した。
従って、本発明の経皮吸収製剤では粘着剤中に含有する油性添加剤が支持フィルムに吸着、移行することがないので、当然ながら支持フィルム背面から油性添加剤が滲出することもなく、粘着剤層の粘着物性を安定に維持できると共に、含有する経皮吸収用薬物の安定した経皮吸収性を維持できるものであることが判る。
Claims (6)
- エチレン−ビニルアルコール共重合体を含む支持フィルムの片面に、油性添加剤および経皮吸収用薬物を含有する粘着剤層を形成してなり、
前記油性添加剤が、炭素数6〜22の高級脂肪酸と炭素数1〜20のアルコールからなる脂肪酸アルキルエステル、または脂肪酸グリセリルエステルである
ことを特徴とする経皮吸収製剤。 - 粘着剤層が、(メタ)アクリル酸アルキルエステルを主成分単量体として共重合してなるアクリル系共重合体をさらに含有する請求項1記載の経皮吸収製剤。
- エチレン−ビニルアルコール共重合体が、ケン化度99〜100%である請求項1記載の経皮吸収製剤。
- エチレン−ビニルアルコール共重合体のエチレン単位の比率が、20〜60モル%である請求項1記載の経皮吸収製剤。
- アクリル系共重合体が、アクリル酸2−エチルヘキシルエステルと、2−ビニルピロリドンおよび/または(メタ)アクリル酸からなる共重合体である請求項2記載の経皮吸収製剤。
- 支持フィルムにおける粘着剤層形成面に、凹凸処理が施されているか、化学変性層が形成されている請求項1記載の経皮吸収製剤。
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