JP6053951B2 - 親水性及び抗菌性を備えるシリコーンゲル接着剤 - Google Patents
親水性及び抗菌性を備えるシリコーンゲル接着剤 Download PDFInfo
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- JP6053951B2 JP6053951B2 JP2015546446A JP2015546446A JP6053951B2 JP 6053951 B2 JP6053951 B2 JP 6053951B2 JP 2015546446 A JP2015546446 A JP 2015546446A JP 2015546446 A JP2015546446 A JP 2015546446A JP 6053951 B2 JP6053951 B2 JP 6053951B2
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- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
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Description
本開示は、親水性シリコーンゲル接着剤、及びより具体的には、電子ビーム又はガンマ線硬化を含む方法によって作製された、架橋親水性シリコーンゲル接着剤に関する。
皮膚に接着させるための、シリコーン感圧接着剤を含む感圧接着剤(PSA)の応用は、当該技術分野において既知であり、多くの例が市販されている。しかしながら、PSAのいくつかの特性が、皮膚への接着用途に関しそれらの適用を制限している。例えば、PSAが示す接着力が強すぎる場合には、PSAを取り外す際に皮膚に損傷が生じる恐れがある。一方で、接着力を低減させた場合、PSAは有用となる十分な保持力に欠く可能性があり、又は室温下で有用となる十分な粘着力を失う恐れがある。更に、皮膚と比較して相対的に堅く、又は柔軟性のないPSAは、典型的には使用時に患者にかなりの不快感を生じさせる。同様に、皮膚に対し測定される低剥離接着力を有する接着剤でさえ、取り外す時に不快感を生じさせる場合がある(例えば、接着剤が毛を巻き込んだ場合など)。
本開示の接着剤組成物は、架橋されたシリコーンゲル、シリコーンゲル中に分散された親水性成分、及びシリコーンゲル中に分散された抗菌剤を含む。この接着剤組成物は皮膚に簡単に適用(及び取り外し)でき、かつ好ましい親水性及び抗菌性を有する。有利なことに、架橋されたシリコーンゲル中の親水性成分は簡単には(例えば、pH 7緩衝液に対して)抽出されにくい。驚くべきことに、架橋されたシリコーンゲル中の親水性成分と抗菌剤の組み合わせによって、相乗的な抗菌活性が提供される。
接着剤組成物(例えば、医療用包帯)の使用においては、接着部位に存在し得る水分の管理をする必要がある。接着剤組成物中に親水性成分を含有させることで、水分が存在する場合に、接着剤組成物の接着力を増大できる。好ましくは、親水性成分は接着剤組成物から抽出されにくく、これは接着剤組成物の医療使用において特に有利である。また、この親水性成分が水分(例えば、創傷部位において)によって抽出されにくいことは多くの場合好ましい。加えて、多くの場合、接着剤組成物に抗菌剤を含有させることが望ましく、好ましくは、接着剤組成物中の親水性成分と抗菌剤の組み合わせによって、接着部位における抗菌性能を相乗的に高めることができる。
式中、R1は、ヒドロキシル、アルキル又はアリールであり、かつR2は、それぞれ独立してアルキル又はアリールである。ポリ(ジオルガノシロキサン)はポリ(シロキサン)主鎖を有している。いくつかの実施形態では、ポリ(ジオルガノシロキサン)は、脂肪族及び/又は芳香族置換基を有するシロキサン主鎖を示す式2によって表される線形材料であってよい。
式中、それぞれのR1は独立にヒドロキシル、アルキル又はアリールであり、それぞれのR2、R3、R4、R5、並びにR6は独立してアルキル又はアリールであり、m及びnは整数であり、m又はnのうち少なくともいずれかはゼロではない。アルキル基は1から約20までの炭素原子を含むことができ、アリール基は一般的に6から10の炭素原子を含むことができる。いくつかの実施形態では、アルキル基又はアリール基のうちの1つ以上はハロゲン置換基、例えばフッ素を含有し得る。例えば、いくつかの実施形態では、1つ以上のアルキル基は−CH2CH2C4F9であってよい。
式中、それぞれのR1は独立にヒドロキシル、アルキル又はアリールであり、それぞれのR2は独立してアルキル又はアリールであり、R7、R8、R9、及びR10のうち少なくとも1つは、アルキル又はアリール(必要に応じてハロゲン化アルキル又はアリール)置換基を有する直鎖又は分枝鎖シロキサンであり、この直鎖又は分枝鎖シロキサンは式1の末端部基を有し、m及びnは整数であり、m又はnのうち少なくともいずれかはゼロではない。式3中、R7、R8、R9、及びR10のうちの残りのR基(すなわち直鎖又は分枝鎖シロキサンではないもの)のいずれかは独立してアルキル又はアリール(必要に応じてハロゲン化アルキル又はアリールを含む)である。式3のアルキル及びアリールは式2で定義される通りのものである。
実施形態1.接着剤組成物であって、
a)式−O−Si(R1)(R2)2の末端基を有する架橋されたポリ(ジオルガノシロキサン)を含み、式中、R1はヒドロキシル、アルキル又はアリールであり、R2はそれぞれ独立してアルキル又はアリールである、シリコーンゲルと、
b)シリコーンゲル中に分散された親水性成分であって、親水性成分が、少なくとも3つのヒドロキシル基を有する炭水化物、少なくとも3つのヒドロキシル基を有する炭水化物誘導体又はそれらの組み合わせを含む、親水性成分と、
c)シリコーンゲル中に分散された抗菌剤であって、抗菌剤が、元素銅、元素銀、銅含有化合物、銀含有化合物又はそれらの組み合わせを含む、抗菌剤と、を備え、
親水性成分の10重量%未満が、室温下で24時間以内に、前記接着剤組成物からpH 7のリン酸緩衝食塩水へと抽出され得る、接着剤組成物。
[式中、それぞれのR1は独立にヒドロキシル、アルキル又はアリールであり、それぞれのR2、R3、R4、R5及びR6は独立してアルキル又はアリールであり、m及びnは整数であり、m又はnのうち少なくともいずれかはゼロではない。]
試料の電子ビームイオン化処理
シリコーン接着剤を塗布したフィルム試料を、電子ビーム発生装置(Energy Sciences,Inc.,Wilmington,MAより入手した商品名「MODEL CB−300」)上で架橋するために電離放射線に曝露した。試料はポリエチレンテレフタレート支持体フィルムに貼り付け、窒素不活性雰囲気下の電子ビーム発生装置の照射室に送り込んだ。
シリコーン接着剤試料の吸収能力は以下の試験方法で決定された。シリコーン接着剤(「初期試料」)をコーティングした、3片の2.5センチメートル×2.5センチメートルのポリウレタンフィルムの試料(「初期試料」)の重量を測定し、それらの質量(「初期質量」)を記録した。これらの試料を、ワイヤーメッシュのかごに入れ、折れたり、他の試料に貼りついたりしないように、ワイヤーメッシュでゆるく覆った。ワイヤーメッシュのかごに入れた試料を、pHが7.4になるように調整された1リットルのリン酸緩衝液(10mM Na2HPO4)の入ったビンに設置した。試料をこの溶液中に24時間保持した後、ビンから取り出し、表面の水分を穏やかに拭きとった後、重量を測定した。吸収は、初期質量からの質量の増分(%)として算出した。典型的には、これらの最終的な、質量を測り終わった試料を、次に、試料一体性測定方法に従って親水性成分の抽出を測定する「試料一体性」について評価した。
「試料一体性」(すなわち、親水性成分の抽出量の測定)は、吸収能力試験方法の、重量測定が終わった最終的な試料を蒸発皿の上に載せ、120℃で4時間乾燥させることにより測定した。この乾燥した試料の重量を測定して、乾燥後の試料の重量を求め、初期試料(すなわち、リン酸塩緩衝液の吸収前)に対して、親水性添加物の重量喪失をパーセントであらわしたものを、以下の式を使って計算する(ここで「wt.」は「重量」の意味である)。
シリコーン接着剤の180°剥離力はASTM D 3330−90(方法A)に従って測定した。ステンレス鋼パネルはChemInstruments(Indian Springs,OH)より入手した。ステンレス鋼パネルをメチルエチルケトン、及びn−ヘプタンの順に洗浄し、使用前に10分乾燥した。ポリウレタンフィルム上の25マイクロメートルの厚みのシリコーン接着剤コーティングを2.54センチメートル×15センチメートルの試料片に切り出した。それぞれの試料片を5センチメートル×20センチメートルの、清潔な、溶媒で洗浄したステンレス鋼パネルに貼り付けた。これは、2キログラムのローラーを、試料片上で、毎分30センチメートルで2回転がすことによって実施した。接着したこの組立品を室温で約1分間放置し、IMASSスリップ/剥離試験機(Instrumentors Inc.,Strongsville,OHより商品名「MODEL SP−2000」で入手)を使用して、毎分30センチメートルの速度で、10秒間のデータ収集時間により、180°剥離接着について試験した。2つの試料を試験し、それぞれの試料の剥離接着力の値の平均を剥離接着力の値とした。
シリコーン接着剤の抗菌活性をJIS Z 2801(日本工業規格、財団法人日本規格協会(東京、日本))に従って実施した。1部のトリプチケースソイブロス(BBL Prepared Plated Media,Becton,Dickinson and Company,Sparks,MD)及び499部のリン酸塩緩衝液(0.3mM KH2PO4)からなる溶液で、約1×106コロニー形成単位/mLの濃度になるよう細菌接種材料を調製した。試料は1インチ×1インチ(2.54cm×2.54cm)の正方形に切り出した。細菌懸濁液の150マイクロリットルアリコートを試料表面に載せ、接種試料を、27℃±1℃にて、所定の接触時間にわたってインキュベートした。インキュベート後、試料を20mLのDey/Engley(D/E)中和培養液(DIFCO,Becton,Dickinson and Company,Sparks,MD)に入れた。段階希釈し、AEROBIC COUNT(AC)PETRIFILM(3M Company(St.Paul,MN))に配置し、中和培養液中に生存している細菌数を求めた。各プレートを35℃±1℃で48時間インキュベートした。適切な希釈に由来する細菌コロニーを、製造元からの使用説明書に従って計数し、1cm2あたりのコロニー形成単位(CFU)として生菌数を記録した。
Claims (4)
- 接着剤組成物であって、
a)式−O−Si(R1)(R2)2の末端基を有する架橋されたポリ(ジオルガノシロキサン)を含み、式中、R1はヒドロキシル、アルキル又はアリールであり、R2はそれぞれ独立してアルキル又はアリールである、シリコーンゲルと、
b)前記シリコーンゲル中に分散された親水性成分であって、前記親水性成分が、少なくとも3つのヒドロキシル基を有する炭水化物、少なくとも3つのヒドロキシル基を有する炭水化物誘導体又はそれらの組み合わせを含む、親水性成分と、
c)前記シリコーンゲル中に分散された抗菌剤であって、前記抗菌剤が、元素銅、元素銀、銅含有化合物、銀含有化合物又はそれらの組み合わせを含む、抗菌剤と、
を備え、
前記親水性成分の10重量%未満が、室温下で24時間以内に、前記接着剤組成物からpH 7のリン酸緩衝食塩水へと抽出され得る、接着剤組成物。 - 前記シリコーンゲルが、ペルオキシド、縮合触媒又はヒドロシリル化触媒の非存在下で架橋される、請求項1に記載の接着剤組成物。
- 前記シリコーンゲルが実質的に−SiH基を含まない、請求項1に記載の接着剤組成物。
- 基材と、前記基材に接着された、請求項1〜3のいずれか一項に記載の接着剤組成物の層と、を含む、物品。
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WO2014088622A1 (en) | 2014-06-12 |
EP2928978A1 (en) | 2015-10-14 |
US10370571B2 (en) | 2019-08-06 |
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US20150299542A1 (en) | 2015-10-22 |
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