JP2020023668A - 伸縮性膜及びその形成方法 - Google Patents
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Abstract
Description
本発明の伸縮性膜は、樹脂の硬化物であり、この樹脂はフッ素原子を有する繰り返し単位と、珪素原子を有する繰り返し単位を有するとともに、主鎖にウレタン結合を有する高分子化合物を含有するものである。前記高分子化合物は、フッ素原子を有する繰り返し単位と、珪素原子を有する繰り返し単位を有するとともに、主鎖にウレタン結合を有するものであれば特に限定されない。各繰り返し単位におけるフッ素原子と珪素素原子の結合位置は特に限定されない。このような伸縮性膜であれば、優れた伸縮性と強度を有し、かつ膜表面の撥水性にも優れる。
上記樹脂に含有される高分子化合物は、フッ素原子を有する繰り返し単位と、珪素原子を有する繰り返し単位を有するとともに、主鎖にウレタン結合を有するものである。フッ素原子を有する繰り返し単位は、フッ素原子を側鎖に有するものであってよく、珪素原子を有する繰り返し単位は、珪素原子を側鎖に有するものであってもよい。このような高分子化合物としては、下記一般式(1)で示される構造を有するものが好ましい。
本発明の伸縮性膜は、上記高分子化合物を含有する樹脂の硬化物である。前記樹脂を硬化物とする方法(硬化方法)として以下の方法がある。
本発明の伸縮性膜は、JIS K6251に規定される引っ張り試験で伸縮率が40〜1000%のものであることが好ましい。このような伸縮率であれば、伸縮配線の被覆膜として特に好適に用いることができる。
本発明の伸縮性膜は、伸縮性を有する導電性配線に接触する膜として用いられるものであることが好ましい。本発明の伸縮性膜は、特にこのような用途に好適に用いることができる。
本発明では、上述の伸縮性膜を形成する方法であって、上記一般式(2)で示されるジオール化合物と、イソシアネート基を有する化合物とを混合し、該混合物を製膜し、加熱によって硬化させる伸縮性膜の形成方法を提供する。
ここで、図1〜9に本発明の伸縮性膜の応用例を示す。図1は、本発明の伸縮性膜で覆った状態の心電計を示す断面図であり、図2は図1の心電計を生体電極側から見た概略図である。また、図3は、本発明の伸縮性膜で覆う前の状態の心電計を示す断面図であり、図4は図3の心電計を生体電極側から見た概略図であり、図3,4の心電計は特許文献1に記載のものである。図3,4に示されるように、心電計1は、3つの生体電極2が電気信号を通電する配線3によって繋がれ、センターデバイス4に接続されている。
ヒドロキシ化合物1の0.5モル、ヒドロキシ化合物2の0.5モル、フルオロペンダントジオール1の0.5モル、シリコーンペンダントジオール1の0.5モルを混合し、60℃で加熱して減圧乾燥によって水分を除去した。イソシアネート化合物1の5モルと、ジブチル錫ジラウレートを0.01モル添加し、60℃で3時間攪拌しながら反応し、ヒドロキシエチルアクリレートを2モル添加し、60℃で3時間攪拌しながら反応し、フルオロシリコーンペンダントウレタン(メタ)アクリレート1を得た。得られた重合体を13C,1H−NMR、及びGPC測定したところ、以下の分析結果となった。
光ラジカル発生剤1:2,4,6−トリメチルベンゾイル−ジフェニル−フォスフィンオキサイド
光ラジカル発生剤2:2,2−ジメトキシ−2−フェニルアセトフェノン
光ラジカル発生剤3:(±)−カンファーキノン
熱ラジカル発生剤1:2,2’−アゾビス(2−メチルプロピオン酸)ジメチル
熱ラジカル発生剤2:アゾビスイソブチロニトリル(AIBN)
有機溶剤:プロピレングリコールモノメチルエーテルアセテート(PGMEA)
硬化後の伸縮性膜における膜厚、及び表面の水の接触角を測定した。また、伸縮性膜表面の水の接触角を測定した後に、伸縮性膜を基板から剥がし、JIS K6251に準じた方法で伸縮率と強度を測定した。結果を表2に示す。
5…粘着部、 6,6’…伸縮性膜、 7…基板、 8…布。
Claims (13)
- 伸縮性膜であって、フッ素原子を有する繰り返し単位と、珪素原子を有する繰り返し単位を有するとともに、主鎖にウレタン結合を有する高分子化合物を含有する樹脂の硬化物であることを特徴とする伸縮性膜。
- 前記珪素原子を有する繰り返し単位が、珪素原子を側鎖に有するものであることを特徴とする請求項1に記載の伸縮性膜。
- 前記フッ素原子を有する繰り返し単位が、フッ素原子を側鎖に有するものであることを特徴とする請求項1又は請求項2に記載の伸縮性膜。
- 前記高分子化合物が、下記一般式(1)で示される構造を有するものであることを特徴とする請求項1から請求項3のいずれか一項に記載の伸縮性膜。
- 前記高分子化合物が、重量平均分子量が500以上のものであることを特徴とする請求項1から請求項6のいずれか一項に記載の伸縮性膜。
- 前記伸縮性膜が、JIS K6251に規定される引っ張り試験で伸縮率が40〜1000%のものであることを特徴とする請求項1から請求項7のいずれか一項に記載の伸縮性膜。
- 前記伸縮性膜が、伸縮性を有する導電性配線に接触する膜として用いられるものであることを特徴とする請求項1から請求項8のいずれか一項に記載の伸縮性膜。
- 伸縮性膜を形成する方法であって、
下記一般式(2)で示されるジオール化合物Maと、ジオール化合物Mb1及び/又はジオール化合物Mb2を含むジオール化合物と、イソシアネート基を有する化合物とを混合し、該混合物を製膜し、加熱によって硬化させることを特徴とする伸縮性膜の形成方法。
- 伸縮性膜を形成する方法であって、
下記一般式(3)で示される、末端に(メタ)アクリレート基を有する化合物を含む樹脂を製膜し、加熱及び/又は光照射によって硬化させることを特徴とする伸縮性膜の形成方法。
- 下記一般式(1)で示される構造を含有するものであることを特徴とする重量平均分子量500〜1000000の範囲の高分子化合物。
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