Thermoplastic polyurethane method of making same and forming a medical article therefrom
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United States of America Patent
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Aug 13, 1996
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app pub date -
Jul 14, 1993
filing date -
Jul 14, 1993
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Abstract
A thermoplastic polyurethane having inherent softness properties is formed from a diisocyanate, a polyetherglycol and a mixture of diol chain extenders. The mixture of chain extenders includes a first diol and a second diol which has side chain branching. A method for making the polyurethane of the present invention includes mixing the components to induce an exothermic reaction, followed by curing. The polyurethane formed is suitable for melt processing into medical devices such as catheters, other tubing, hubs and the like.
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