JP6854814B2 - 医療器具を形成するための熱可塑性ポリウレタン材料 - Google Patents
医療器具を形成するための熱可塑性ポリウレタン材料 Download PDFInfo
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- JP6854814B2 JP6854814B2 JP2018518991A JP2018518991A JP6854814B2 JP 6854814 B2 JP6854814 B2 JP 6854814B2 JP 2018518991 A JP2018518991 A JP 2018518991A JP 2018518991 A JP2018518991 A JP 2018518991A JP 6854814 B2 JP6854814 B2 JP 6854814B2
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- polyurethane
- propanediol
- access device
- thermoplastic polyurethane
- vascular access
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Description
HO(CH2CH2CH2CH2−O−)nH
(式中、nは3から40までの範囲内の平均値を有する)を有するポリテトラメチレンエーテルグリコール(PTMEG)である。さらに別の実施形態において、少なくとも1種のポリグリコールは、少なくとも2種またはそれ以上のPTMEGの配合物であり、第1のPTMEGは、250ダルトンから1000ダルトン未満の範囲内の第1の公称分子量を有し、第2のPTMEGは、1000ダルトンから2900ダルトンまでの範囲内の第2の公称分子量を有する。具体的な実施形態において、少なくとも1種のポリグリコールは、種々の分子量(MW)を有する2種以上のPTMEG:PTMEG250、PTMEG650、PTMEG1000、PTMEG1450、PTMEG1800、PTMEG2000、およびPTMEG2900の配合物である(「PTMEG」の後ろの数値は、ダルトン単位の公称MWである)。PTMEG250は230〜270のMWを有し、PTMEG650は625〜675のMWを有し、PTMEG1000は950〜1050のMWを有し、PTMEG1450は1350〜1450のMWを有し、PTMEG1800は1700〜1900のMWを有し、PTMEG2000は1900〜2100のMWを有し、およびPTMEG2900は2825〜2975のMWを有する。
4,4’−ジフェニルメタンジイソシアネート、2,2’−ジメチル−4,4’−ビフェニルジイソシアネート、3,3’−ジメチル−4,4’−ビフェニルジイソシアネート、およびそれらの組み合わせからなる群から選択される芳香族ジイソシアネート;
ポリエチレンオキシドグリコール(PEG)、ポリプロピレンオキシドグリコール(PPG)、ポリテトラメチレンエーテルグリコール(PTMEG)、ポリエステルグリコール、シリコーングリコール、ポリカーボネートグリコールおよびそれらの組み合わせからなる群から選択される少なくとも1種のポリグリコール;および
2,2−ジメチル−1,3−プロパンジオール、2−メチル−1,3−プロパンジオール、およびそれらの組み合わせからなる群から選択される少なくとも1種の鎖延長剤
の反応生成物を含む溶融加工可能な熱可塑性ポリウレタンを指向する。
以下の成分:非芳香族ジイソシアネートを除外する芳香族ジイソシアネート;少なくとも1種のポリグリコール;および少なくとも1種の側鎖分枝ジオールを含むが直鎖ジオールを除外する鎖延長剤を含み合わせる工程と;
触媒を用いない単工程塊状重合において前記成分を重合させ、熱可塑性ポリウレタンを形成する工程と;
ポリウレタンを硬化させる工程と;
ポリウレタンを熱成形に適当なチップに集める工程と;
ポリウレタンを、血管アクセス器具へと成形する工程と
を含む。側鎖分枝ジオールは、2,2−ジメチル−1,3−プロパンジオール、2−メチル−1,3−プロパンジオール、またはその両方を、0:100から100:0までの2,2−ジメチル−1,3−プロパンジオール:2−メチル−1,3−プロパンジオールの重量比で含んでもよい。
イソシアネート指数=イソシアネート当量/ポリオール当量
イソシアネート当量は、芳香族ジイソシアネート1g当量と化合する試料の重量として定義される。試料は、一般的には、イソシアネートと反応することができる、ポリオール、アミン、または他の化合物である。C. Hepburn "Polyurethane Elastomers " 2nd Edition, Springer, pages 42−43, (1992)を参照。一般的に、ポリウレタンは、イソシアネート指数の増加に伴い、より硬くなる。しかしながら、その点を超えると硬度が増大しなくなり、および他の物理的特性が低下し始める点が存在する。
本明細書で議論されるポリウレタンは、「ワンショット」塊状重合プロセスにより調製された。最初にバキュームストリップを用いて、次いで12〜24時間にわたる窒素ガスパージを用いて、ポリオールおよび鎖延長剤を徹底的に混合した。室温において、激しく攪拌しながら、計算された量のMDIを一回で全て添加した。激しい攪拌を実施し、次いで混合物をテフロン内張りされたトレイに注ぎ、後硬化のために直ちにオーブン内に配置した。
芳香族ジイソシアネートとしてMDIを用い、種々の分子量(公称MW<1000および公称1000≧MW≦2900)を有するポリグリコールPTMEGを伴う、上記の例示的調合物Cにしたがう「ワンショット」塊状重合プロセス(無触媒)により、ポリウレタンを作製した。鎖延長剤は、2,2−ジメチル−1.3−プロパンジオールであった。
「ワンショット」塊状重合プロセス(無触媒)により、参考のポリウレタンを作製した。参考のポリウレタンは、芳香族ジイソシアネートとしてのMDI、本発明実施例1に比較してより狭いPTMEG分子量分布を有するポリグリコールPTMEGを用いた。参考のポリウレタンは、鎖延長剤として直鎖ジオールを用いる。
本発明実施例1および参考実施例2のポリウレタンを、引張強度および伸びに関して試験した。本発明のポリウレタンの引張、伸びおよび弾性率を、Instron万能試験機モデル1122を用いるASTM手順D638により測定してもよい。第1表は結果の比較を提供する。
Foremost粉砕機により、合成したポリウレタン板状物を顆粒へと粉砕した。二軸スクリュー配合機により、ポリウレタンの顆粒を、均一の寸法を有するポリウレタンペレットへと配合した。配合条件を第3表に示した。配合されたペレットを24時間にわたって乾燥させ、Davis−Standard一軸スクリュー押出機を用いて18ゲージの管へと押出した。
カテーテル管の剛性を、最大曲げ力の測定により特徴付けた。曲げ力試験は、2000gのロードセルを取り付けたInstron万能試験機モデル1122を用い、2インチ長さのカテーテル管について実施した。管を曲げるのに必要とする最大軸方向力の圧縮測定を実施した。管の軟化の程度は、25℃において少なくとも40時間および37℃のノーマルセーライン溶液中24時間にわたって管をコンディショニングした後に測定される曲げ力の減少のパーセントにより決定した。
前述と同様の方法により、純粋なポリウレタンペレットに加えて、伝統的な慣用の配合機により、ポリウレタンの顆粒を硫酸バリウム粉末と配合して、放射線不透性のポリウレタン−硫酸バリウム配合物を形成した。
Claims (8)
- 溶融加工可能な熱可塑性ポリウレタンを含む血管アクセス器具であって、前記溶融加工可能な熱可塑性ポリウレタンは、
4,4’−ジフェニルメタンジイソシアネート、2,2’−ジメチル−4,4’−ビフェニルジイソシアネート、3,3’−ジメチル−4,4’−ビフェニルジイソシアネート、およびそれらの組み合わせからなる群から選択される芳香族ジイソシアネートと;
ポリエチレンオキシドグリコール(PEG)、ポリプロピレンオキシドグリコール(PPG)、ポリテトラメチレンエーテルグリコール(PTMEG)、およびそれらの組み合わせからなる群から選択される少なくとも1種のポリグリコールと;
2,2−ジメチル−1,3−プロパンジオール、2−メチル−1,3−プロパンジオール、およびそれらの組み合わせからなる群から選択される少なくとも1種の鎖延長剤と;
任意選択的に、アミン終端ポリエーテルと
の反応生成物を含むことを特徴とする血管アクセス器具。 - 前記溶融加工可能な熱可塑性ポリウレタンは、前記ポリウレタンを基準とする重量パーセンテージにおいて、
約40%から約55%の前記芳香族ジイソシアネートと、
約15%から約59.9%の前記少なくとも1種のポリグリコールと、
約0.1%から約25%の前記少なくとも1種の鎖延長剤と、
任意選択的に、0%から約30%の前記アミン終端ポリエーテルと
を含み、量の合計が100%であることを特徴とする請求項1に記載の血管アクセス器具。 - 前記溶融加工可能な熱可塑性ポリウレタンは、放射線不透性材料、抗血栓剤、抗菌剤、潤滑剤、または着色剤の1種または複数種をさらに含むことを特徴とする請求項1に記載の血管アクセス器具。
- 前記溶融加工可能な熱可塑性ポリウレタンは、50重量%と75重量%との間の範囲内のハードセグメント含有量を含むことを特徴とする請求項1に記載の血管アクセス器具。
- 前記溶融加工可能な熱可塑性ポリウレタンは、前記ポリウレタンの約46%(w/w)から約49%(w/w)の範囲内の量の前記芳香族ジイソシアネートと、前記ポリウレタンの約12%(w/w)から約18%(w/w)の範囲内の量の前記鎖延長剤とを含むことを特徴とする請求項2に記載の血管アクセス器具。
- 血管アクセス器具は、中心静脈カテーテル、末梢挿入型中心静脈カテーテル、または末梢静脈内カニューレを含む群から選択されることを特徴とする請求項1に記載の血管アクセス器具。
- 以下の成分:非芳香族ジイソシアネートを除く芳香族ジイソシアネートと、少なくとも1種のポリグリコールと、少なくとも1種の側鎖分枝ジオールを含み、直鎖ジオールを除外する鎖延長剤とを組み合わせる工程と、
前記成分を、触媒を用いない単工程塊状重合で重合させて、熱可塑性ポリウレタンを形成する工程と、
ポリウレタンを硬化させる工程と、
ポリウレタンを熱成形に適当なチップに集める工程と、
ポリウレタンを溶融成形して血管アクセス器具を得る工程と
を含み、前記側鎖分枝ジオールが、式(IV)
の構造を有することを特徴とする、血管アクセス器具を製造する方法。 - 前記側鎖分枝ジオールは、2,2−ジメチル−1,3−プロパンジオール、2−メチル−1,3−プロパンジオール、またはその両方から本質的に構成され、2,2−ジメチル−1,3−プロパンジオール:2−メチル−1,3−プロパンジオールの重量比は0:100から100:0までであることを特徴とする請求項7に記載の方法。
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US11344705B2 (en) | 2017-12-27 | 2022-05-31 | Argos Corporation | Split sheath introducer and method of manufacturing a split sheath introducer |
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CN114949372B (zh) * | 2021-02-25 | 2023-08-29 | 贝克顿·迪金森公司 | 聚氨酯型医疗制品 |
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BR112018007251A2 (pt) | 2018-11-06 |
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EP3362493B1 (en) | 2023-07-12 |
BR112018007251B1 (pt) | 2022-05-03 |
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