Thermoplastic polyurethane blends
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United States of America Patent
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Jan 25, 1994
Grant Date -
N/A
app pub date -
Sep 3, 1992
filing date -
Sep 3, 1992
priority date (Note) -
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Abstract
A thermoplastic polyurethane chain extended with an alkylenediol is blended with a thermoplastic polyurethane chain extended with an oxyalkylene qlycol oligomer. The blend is extruded into a catheter tubing having sufficient initial stiffness for satisfactory insertion in a patient and a high degree of softening for safe positioning and long term catheterization procedures without the risk of vessel wall perforation.
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