JP6634487B2 - 分解性光架橋剤 - Google Patents
分解性光架橋剤 Download PDFInfo
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- JP6634487B2 JP6634487B2 JP2018154782A JP2018154782A JP6634487B2 JP 6634487 B2 JP6634487 B2 JP 6634487B2 JP 2018154782 A JP2018154782 A JP 2018154782A JP 2018154782 A JP2018154782 A JP 2018154782A JP 6634487 B2 JP6634487 B2 JP 6634487B2
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- 239000003795 chemical substances by application Substances 0.000 claims description 141
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Description
上述したように、分解性連結剤は、連結基に結合されている1個以上の光反応性基を含む。分解性連結剤は、式Photo1−LG−Photo2により表わされ得、式中、Photo1およびPhoto2は、独立して、少なくとも1個の光反応性基を表わし、LGは、連結基を表わす。本明細書で使用される場合、用語「連結基」は、2個以上の分子を互いに連結させるように構成されている分子の部分または基であって、当該連結基は1つ以上の条件下で分解することが可能であるものをいう。1つの実施形態において、連結基は、少なくとも1個のケイ素原子を含む。別の実施形態において、連結基は、少なくとも1個のリン原子を含む。
(a)ビス(4−ベンゾイルフェニル)水素ホスフェート:
分解性連結剤は、任意の適切な反応経路を使用して形成され得る。1つの実施形態において、分解性連結剤は、官能基化された連結分子を、1個以上の、典型的には2個以上の、光反応性基と反応させることによって形成される。本明細書で使用される場合、用語「連結分子」は、分解性連結剤の連結基成分であって、1個以上の光反応性基に結合される前のものをいう。用語「官能基化された連結分子」は、連結分子が1個以上の反応性官能基を含んでいることを示すために使用される。1つの実施形態において、連結分子は、1個以上のハロゲン官能基を含む。用語「ハロゲン」は、フッ素、塩素、臭素、またはヨウ素官能基をいう。別の実施形態において、連結分子は、1個以上のトリフルオロメタンスルフォネート(CF3SO3−)官能基を含む。
分解性連結剤は、任意の適切な反応経路を使用して形成され得る。1つの実施形態において、分解性連結剤は、ハロゲン化またはトリフレート化された連結分子を、1個以上の、典型的には2個以上の、光反応性基と、例えば求核置換反応により、反応させることによって形成される。本明細書で使用される場合、用語「連結分子」は、分解性連結剤の連結基成分であって、光反応性基に結合される前のものをいう。本明細書で使用される場合、用語「ハロゲン化(された)」は、適切な条件下で求核置換反応において脱離基として機能し得る1個以上のハロゲン置換基(フッ素、塩素、臭素、またはヨウ素を含む)の存在をいう。本明細書で使用される場合、用語トリフレート化(された)は、適切な条件下で求核置換反応において脱離基として機能し得る1個以上のトリフルオロメタンスルフォネート(CF3SO3−)官能基の存在をいう。
本明細書で使用される場合、用語「光反応性基」は、特定の加えられた外部刺激に応答して活性種生成を行い、同じまたは異なる分子により提供され得る隣接する化学構造と、共有結合を形成することが可能な1個以上の官能基を有する分子をいう。光反応性基は、貯蔵条件下ではその共有結合をもとのまま維持するが、外部エネルギー源による活性化により他の分子と1個以上の共有結合を形成する、ある分子中の原子の基である。1つの実施形態において、光反応性基は、電磁エネルギーの吸収により活性種(例えば、フリーラジカル)を生成し得る。光反応性基は、電磁スペクトルの様々な部分(例えば、スペクトルの紫外部分および可視部分を含む)に応答性であるように選択され得る。光反応性基は、例えば米国特許第5,002,582号明細書に記載されており、その開示内容は参照により本明細書に援用される。
1つの実施形態において、連結剤は、水溶性、血液適合性および/または抗血栓形成性などの特性を改善するために、1個以上の荷電基を含む。本明細書で使用される場合、「荷電」基は、一般に、溶液中でイオン形態にて存在する、すなわち、使用の条件(例えばpH)下において電荷を有する基をいう。連結剤中の荷電基の種類および数は可変である。1つの実施形態において、連結剤は、連結剤に(室温および最適pHで)少なくとも約0.1mg/mL、少なくとも約0.5mg/mL、および少なくとも約1mg/mLの水への溶解度を付与するのに十分な数および種類の荷電基を含む。1つの実施形態において、連結剤は、表面コーティング処理における使用に向けて構成されており、少なくとも約0.1mg/mLの溶解度レベルを有する。
1つの実施形態において、分解性連結剤は、支持体表面上にコーティングを形成するために使用される。1つの実施形態において、コーティングは疎水性である。別の実施形態において、コーティングは親水性である。コーティングは、任意の好適なやり方で、例えば支持体表面への連結剤および化合物(例えば、重合性基を有する分子)の同時のまたは逐次的な結合により、形成され得る。1つの実施形態において、その方法は、連結剤が最初に表面に結合され、その後に、その結合した連結剤の光開始剤を使用して化合物がその上で重合されるという逐次的な工程を含む二段法を含む。逐次的なアプローチの1つの利点は、この種の光重合が、支持体表面上の薄いポリマー層の生成を可能にすることである。結果として生じるポリマー層は、典型的に、接着性が高く、厚さが均一であり、かつ耐久性が高い。さらに、ポリマー層を形成するために使用される溶液は、あらゆる表面形態の任意の適切な支持体表面に(例えば、溶液としての塗布、浸し塗り、吹付塗り、ナイフ塗布、およびローラー塗りによって)塗布され得る。結果として生じるポリマー層は、ひいては滑らかな比較的均一な表面のみならず、不規則な表面を覆うようにも適応されていることができる。重合性種はまた、連結剤と同時に支持体表面に、そのような同時の連結剤の結合および重合性種の重合を可能にするのに適した反応条件を与えることによって、結合され得る。
別の実施形態において、連結剤は、インサイチュー重合が可能な組成物に関して使用され得る。1つの実施形態において、連結剤は、生体適合性の生分解性ポリマーフォームに関して使用され得る。創傷の処置に使用される生分解性フォームは、例えば米国特許出願公開第2009/0093550号明細書に記載されており、その開示内容は、これによりその全体が参照により本明細書に援用される。
Claims (9)
- 前記連結剤の1個以上のベンゾフェノン基が、医療デバイスの表面と共有結合されている、請求項1に記載のコーティングされた医療デバイス。
- 前記連結剤の1個以上のベンゾフェノン基が、前記ポリマーコーティングと共有結合されている、請求項1に記載のコーティングされた医療デバイス。
- 疎水性ポリマーコーティングを含む、請求項1に記載のコーティングされた医療デバイス。
- 親水性ポリマーコーティングを含む、請求項1に記載のコーティングされた医療デバイス。
- 医療デバイスが、脈管デバイス、整形外科デバイス、歯科デバイス、または眼科デバイスを含む、請求項1に記載のコーティングされた医療デバイス。
- 医療デバイスがカテーテルを含む、請求項1に記載のコーティングされた医療デバイス。
- 医療デバイスが移植片を含む、請求項1に記載のコーティングされた医療デバイス。
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